Fix installation stuff

.clangd

@@ -1,5 +1,5 @@
 CompileFlags:
-  Add: [-I/home/syed/main/crib/include, -I/home/syed/main/crib/libs, -I/usr/include/ruby-3.4.0, -I/usr/include/ruby-3.4.0/x86_64-linux, c++20]
+  Add: [-I/home/syed/main/crib/include, -I/home/syed/main/crib/libs, -I/home/syed/main/crib/libs/libruby, c++20]
   Remove: []
   Compiler: clang++
 

.gitattributes

@@ -1 +1 @@
-/libs/unicode_width/** linguist-vendored
+/libs/** linguist-vendored

.gitignore

@@ -3,6 +3,7 @@
 *.a
 *.o
 *.so
+!libs/libruby/libruby.so
 *.yml
 
 .vscode

Makefile

@@ -4,7 +4,8 @@ OBJ_DIR := build
 INCLUDE_DIR := include
 
 TARGET_DEBUG := $(BIN_DIR)/crib-dbg
-TARGET_RELEASE := $(BIN_DIR)/crib
+TARGET_RELEASE_32 := $(BIN_DIR)/crib-ruby3.2
+TARGET_RELEASE_34 := $(BIN_DIR)/crib-ruby3.4
 
 PCH_DEBUG := $(OBJ_DIR)/debug/pch.h.gch
 PCH_RELEASE := $(OBJ_DIR)/release/pch.h.gch
@@ -12,13 +13,23 @@ PCH_RELEASE := $(OBJ_DIR)/release/pch.h.gch
 CCACHE := ccache
 CXX := $(CCACHE) clang++
 
+RUBY32_INC := -I./libs/libruby
+RUBY32_LIB := libs/libruby/libruby.so
+RUBY32_PATCH := patchelf --replace-needed libruby-3.2.so.3.2 libruby.so
+
+RUBY34_INC := \
+	-I/usr/include/ruby-3.4.0 \
+	-I/usr/include/ruby-3.4.0/x86_64-linux
+
+RUBY34_LIB := -lruby
+
 CFLAGS_DEBUG :=\
 	-std=c++23 -Wall -Wextra -Wno-c23-extensions \
 	-O0 -fno-inline -gsplit-dwarf\
 	-g -fno-omit-frame-pointer\
 	-Wno-unused-command-line-argument \
-	-I./include -I./libs \
-	-I/usr/include/ruby-3.4.0 -I/usr/include/ruby-3.4.0/x86_64-linux
+	-I./include -I./libs -I./libs/libruby
+
 CFLAGS_RELEASE :=\
 	-std=c++23 -O3 -march=native \
   -fno-rtti -fstrict-aliasing \
@@ -29,8 +40,20 @@ CFLAGS_RELEASE :=\
 	-fno-unwind-tables -fno-asynchronous-unwind-tables\
 	-Wno-unused-command-line-argument \
 	-Wno-c23-extensions \
-	-I./include -I./libs \
-	-I/usr/include/ruby-3.4.0 -I/usr/include/ruby-3.4.0/x86_64-linux
+	-I./include -I./libs -I./libs/libruby
+
+CFLAGS_RELEASE_32 := $(CFLAGS_RELEASE) $(RUBY32_INC)
+CFLAGS_RELEASE_34 := $(CFLAGS_RELEASE) $(RUBY34_INC)
+
+LIBS_32 := \
+	libs/libgrapheme/libgrapheme.a \
+	$(RUBY32_LIB) \
+	-Wl,-Bstatic -lpcre2-8 -Wl,-Bdynamic -lmagic
+
+LIBS_34 := \
+	libs/libgrapheme/libgrapheme.a \
+	$(RUBY34_LIB) \
+	-Wl,-Bstatic -lpcre2-8 -Wl,-Bdynamic -lmagic
 
 PCH_CFLAGS_DEBUG := $(CFLAGS_DEBUG) -x c++-header
 PCH_CFLAGS_RELEASE := $(CFLAGS_RELEASE) -x c++-header
@@ -40,10 +63,6 @@ UNICODE_SRC := $(wildcard libs/unicode_width/*.c)
 UNICODE_OBJ_DEBUG := $(patsubst libs/unicode_width/%.c,$(OBJ_DIR)/debug/unicode_width/%.o,$(UNICODE_SRC))
 UNICODE_OBJ_RELEASE := $(patsubst libs/unicode_width/%.c,$(OBJ_DIR)/release/unicode_width/%.o,$(UNICODE_SRC))
 
-LIBS := \
-	libs/libgrapheme/libgrapheme.a \
-	-Wl,-Bstatic -lpcre2-8 -Wl,-Bdynamic -lmagic -lruby
-
 SRC := $(wildcard $(SRC_DIR)/**/*.cc) $(wildcard $(SRC_DIR)/*.cc)
 OBJ_DEBUG := $(patsubst $(SRC_DIR)/%.cc,$(OBJ_DIR)/debug/%.o,$(SRC))
 OBJ_RELEASE := $(patsubst $(SRC_DIR)/%.cc,$(OBJ_DIR)/release/%.o,$(SRC))
@@ -57,7 +76,7 @@ all: debug
 
 test: $(TARGET_DEBUG)
 
-release: $(TARGET_RELEASE)
+release: $(TARGET_RELEASE_32) $(TARGET_RELEASE_34)
 
 $(PCH_DEBUG): $(INCLUDE_DIR)/pch.h
 	mkdir -p $(dir $@)
@@ -70,10 +89,16 @@ $(PCH_RELEASE): $(INCLUDE_DIR)/pch.h
 $(TARGET_DEBUG): $(PCH_DEBUG) $(OBJ_DEBUG) $(UNICODE_OBJ_DEBUG)
 	mkdir -p $(BIN_DIR)
 	$(CXX) $(CFLAGS_DEBUG) -o $@ $(OBJ_DEBUG) $(UNICODE_OBJ_DEBUG) $(LIBS)
+	patchelf --replace-needed libruby-3.2.so.3.2 libruby.so $@
 
-$(TARGET_RELEASE): $(PCH_RELEASE) $(OBJ_RELEASE) $(UNICODE_OBJ_RELEASE)
+$(TARGET_RELEASE_32): $(PCH_RELEASE) $(OBJ_RELEASE) $(UNICODE_OBJ_RELEASE)
 	mkdir -p $(BIN_DIR)
-	$(CXX) $(CFLAGS_RELEASE) -o $@ $(OBJ_RELEASE) $(UNICODE_OBJ_RELEASE) $(LIBS)
+	$(CXX) $(CFLAGS_RELEASE_32) -o $@ $(OBJ_RELEASE) $(UNICODE_OBJ_RELEASE) $(LIBS_32)
+	$(RUBY32_PATCH) $@
+
+$(TARGET_RELEASE_34): $(PCH_RELEASE) $(OBJ_RELEASE) $(UNICODE_OBJ_RELEASE)
+	mkdir -p $(BIN_DIR)
+	$(CXX) $(CFLAGS_RELEASE_34) -o $@ $(OBJ_RELEASE) $(UNICODE_OBJ_RELEASE) $(LIBS_34)
 
 $(OBJ_DIR)/debug/%.o: $(SRC_DIR)/%.cc $(PCH_DEBUG)
 	mkdir -p $(dir $@)

README.md

@@ -12,6 +12,19 @@ It aims to be complete general purpose IDE.<br>
 (It is still very much a work in progress so a lot of things may seem incomplete)<br>
 For now it is just a single file editor. I plan to add a multi-file support with file pickers and tabs soon.<br>
 
+## Installation
+
+Binary can be installed with the following command:
+
+```bash
+curl https://syedm.dev/crib | sh
+```
+
+It requires `libruby-3.2.so` or `libruby.so.3.4` to be installed in the system.<br>
+It also requires `libmagic` to be installed (most systems have it preinstalled).<br>
+Currently only for Linux.<br>
+*Tested with arch linux and ubuntu*<br>
+
 ## Building
 
 ### Get started

TODO.md

@@ -9,6 +9,7 @@ Copyright 2025 Syed Daanish
 * [ ] **Critical Crash:** Fix bug where closing immediately while LSP is still loading hangs and then segfaults (especially on slow ones like fish-lsp where quick edits and exit can hang).
 * [ ] **Line move:** fix the move line functions to work without the calculations from folds as folds are removed.
 * [ ] **Editor Indentation Fix:** - Main : merger indentation with the parser for more accurate results.
+    * [ ] Fix bug where enter at start of line with ending type crashes
     * [ ] Keep cache of language maps in engine to reduce lookup time.
     * [ ] In indents add function to support tab which indents if before any content and inserts a pure \t otherwise.
     * [ ] And backspace which undents if before any content.

include/pch.h

@@ -6,7 +6,7 @@
 
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wunused-parameter"
-#include <ruby.h>
+#include "ruby/ruby.h"
 #pragma clang diagnostic pop
 #include <magic.h>
 #include <nlohmann/json.hpp>

installer.sh

@@ -1,43 +1,91 @@
-#!/usr/bin/env bash
-set -e
+#!/usr/bin/env sh
 
-BINARY_NAME="crib"
-GITHUB_URL="https://github.com/SyedM-dev/crib/releases/download/v0.0.1-alpha/crib-linux-x86_64"
+set -eu
 
-# 1️⃣ Check dependencies
-missing=()
-command -v ruby >/dev/null 2>&1 || missing+=("ruby")
-ldconfig -p | grep libmagic >/dev/null 2>&1 || missing+=("libmagic")
+install() {
+  BINARY_NAME="crib"
+  VERSION="v0.0.1-alpha"
+  RUBY_VERSION="3.4"
+  HAVE_34=0
+  HAVE_32=0
 
-if [ ${#missing[@]} -ne 0 ]; then
-  echo "Missing dependencies: ${missing[*]}"
-  echo "Install them using your package manager:"
-  echo "Ubuntu/Debian: sudo apt install ruby libmagic1"
-  echo "Arch: sudo pacman -S ruby file"
-  echo "Void: sudo xbps-install -Sy ruby file"
-  exit 1
-fi
+  if ldconfig -p | grep -q libruby.so.3.4; then
+    HAVE_34=1
+  fi
+  if ldconfig -p | grep -q libruby-3.2.so; then
+    HAVE_32=1
+  fi
 
-# 2️⃣ Ask installation path
-echo "Install locally (~/.local/bin) or globally (/usr/bin)? [l/g]"
-read -r choice
-case "$choice" in
-l | L) INSTALL_DIR="$HOME/.local/bin" ;;
-g | G) INSTALL_DIR="/usr/bin" ;;
-*)
-  echo "Invalid choice"
-  exit 1
-  ;;
-esac
+  if [ "$HAVE_34" = "1" ] && [ "$HAVE_32" = "1" ]; then
+    echo "Multiple Ruby versions detected."
+    echo "Select Ruby ABI:"
+    echo "  1) Ruby 3.4"
+    echo "  2) Ruby 3.2"
+    read -r choice </dev/tty
+    case "$choice" in
+    1) RUBY_VERSION="3.4" ;;
+    2) RUBY_VERSION="3.2" ;;
+    *)
+      echo "Invalid choice"
+      exit 1
+      ;;
+    esac
+  elif [ "$HAVE_34" = "1" ]; then
+    RUBY_VERSION="3.4"
+  elif [ "$HAVE_32" = "1" ]; then
+    RUBY_VERSION="3.2"
+  else
+    echo "No compatible Ruby library found need Ruby 3.2 or 3.4."
+    exit 1
+  fi
 
-mkdir -p "$INSTALL_DIR"
+  GITHUB_URL="https://github.com/SyedM-dev/crib/releases/download/$VERSION/crib-linux-x86_64-ruby$RUBY_VERSION"
 
-# 3️⃣ Download the binary
-echo "Downloading binary..."
-curl -L "$GITHUB_URL" -o "$INSTALL_DIR/$BINARY_NAME"
-chmod +x "$INSTALL_DIR/$BINARY_NAME"
+  missing_ruby=""
+  missing_magic=""
+  command -v ruby >/dev/null 2>&1 || missing_ruby="ruby"
+  ldconfig -p | grep libmagic >/dev/null 2>&1 || missing_magic="libmagic"
 
-# 4️⃣ Optional: confirm
-echo "$BINARY_NAME installed to $INSTALL_DIR"
-echo "You can run it with: $BINARY_NAME"
-echo "Remember to add $INSTALL_DIR to PATH if not already."
+  if [ -n "$missing_ruby" ] || [ -n "$missing_magic" ]; then
+    echo "Missing dependencies: ${missing_ruby} ${missing_magic}"
+    echo "Install them using your package manager:"
+    echo "Ubuntu/Debian: sudo apt install ruby libmagic1"
+    echo "Arch: sudo pacman -S ruby file"
+    echo "Void: sudo xbps-install -Sy ruby file"
+    exit 1
+  fi
+
+  echo "Installing Crib (Ruby $RUBY_VERSION)"
+
+  echo "Install locally (~/.local/bin) or globally (/usr/bin)? [l/g]"
+  read -r choice </dev/tty
+  case "$choice" in
+  l | L)
+    INSTALL_DIR="$HOME/.local/bin"
+    SUDO=""
+    ;;
+  g | G)
+    INSTALL_DIR="/usr/bin"
+    SUDO="sudo"
+    ;;
+  *)
+    echo "Invalid choice"
+    exit 1
+    ;;
+  esac
+
+  $SUDO mkdir -p "$INSTALL_DIR"
+
+  echo "Downloading binary..."
+  curl -L "$GITHUB_URL" -o /tmp/"$BINARY_NAME"
+  $SUDO install -m 755 /tmp/"$BINARY_NAME" "$INSTALL_DIR/$BINARY_NAME"
+  rm -f /tmp/"$BINARY_NAME"
+
+  echo
+  echo "✔ Crib installed to $INSTALL_DIR"
+  echo "Run with: $BINARY_NAME"
+  echo "Ruby ABI: $RUBY_VERSION"
+  echo "Add $INSTALL_DIR to PATH if needed."
+}
+
+install "$@"

libs/libruby/ruby.h

@@ -0,0 +1,40 @@
+#ifndef RUBY_H                                       /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_H 1
+/**
+ * @author     $Author$
+ * @date       Sun 10 12:06:15 Jun JST 2007
+ * @copyright  2007-2008 Yukihiro Matsumoto
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ */
+#define HAVE_RUBY_ATOMIC_H      1
+#define HAVE_RUBY_DEBUG_H       1
+#define HAVE_RUBY_DEFINES_H     1
+#define HAVE_RUBY_ENCODING_H    1
+#define HAVE_RUBY_FIBER_SCHEDULER_H 1
+#define HAVE_RUBY_INTERN_H      1
+#define HAVE_RUBY_IO_H          1
+#define HAVE_RUBY_MEMORY_VIEW_H 1
+#define HAVE_RUBY_MISSING_H     1
+#define HAVE_RUBY_ONIGMO_H      1
+#define HAVE_RUBY_ONIGURUMA_H   1
+#define HAVE_RUBY_RACTOR_H      1
+#define HAVE_RUBY_RANDOM_H      1
+#define HAVE_RUBY_RE_H          1
+#define HAVE_RUBY_REGEX_H       1
+#define HAVE_RUBY_RUBY_H        1
+#define HAVE_RUBY_ST_H          1
+#define HAVE_RUBY_THREAD_H      1
+#define HAVE_RUBY_THREAD_NATIVE_H 1
+#define HAVE_RUBY_UTIL_H        1
+#define HAVE_RUBY_VERSION_H     1
+#define HAVE_RUBY_VM_H          1
+#ifdef _WIN32
+#define HAVE_RUBY_WIN32_H       1
+#endif
+
+#include "ruby/ruby.h"
+
+#endif /* RUBY_H */

libs/libruby/ruby/assert.h

@@ -0,0 +1,234 @@
+#ifndef RUBY_ASSERT_H                                /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_ASSERT_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @date       Wed May 18 00:21:44 JST 1994
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ */
+#include "ruby/internal/assume.h"
+#include "ruby/internal/attr/cold.h"
+#include "ruby/internal/attr/noreturn.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/backward/2/assume.h"
+
+/* RUBY_NDEBUG  is very  simple:  after everything  described  below are  done,
+ * define it with either NDEBUG is undefined (=0) or defined (=1).  It is truly
+ * subordinate.
+ *
+ * RUBY_DEBUG versus NDEBUG is complicated.  Assertions shall be:
+ *
+ *                      | -UNDEBUG | -DNDEBUG
+ *       ---------------+----------+---------
+ *       -URUBY_DEBUG   | (*1)     | disabled
+ *       -DRUBY_DEBUG=0 | disabled | disabled
+ *       -DRUBY_DEBUG=1 | enabled  | (*2)
+ *       -DRUBY_DEBUG   | enabled  | (*2)
+ *
+ * where:
+ *
+ *   - (*1): Assertions shall  be silently disabled, no warnings,  in favour of
+ *     commit 21991e6ca59274e41a472b5256bd3245f6596c90.
+ *
+ *   - (*2): Compile-time warnings shall be issued.
+ */
+
+/** @cond INTERNAL_MACRO */
+
+/*
+ * Pro tip: `!!RUBY_DEBUG-1` expands to...
+ *
+ * - `!!(-1)`  (== `!0`  ==  `1`) when RUBY_DEBUG is defined to be empty,
+ * - `(!!0)-1` (== `0-1` == `-1`) when RUBY_DEBUG is defined as 0, and
+ * - `(!!n)-1` (== `1-1` ==  `0`) when RUBY_DEBUG is defined as something else.
+ */
+#if ! defined(RUBY_DEBUG)
+# define RBIMPL_RUBY_DEBUG 0
+#elif !!RUBY_DEBUG-1 < 0
+# define RBIMPL_RUBY_DEBUG 0
+#else
+# define RBIMPL_RUBY_DEBUG 1
+#endif
+
+/*
+ * ISO/IEC 9899 (all past versions) says that  "If NDEBUG is defined as a macro
+ * name at  the point  in the  source file where  <assert.h> is  included, ..."
+ * which means we must not take its defined value into account.
+ */
+#if defined(NDEBUG)
+# define RBIMPL_NDEBUG 1
+#else
+# define RBIMPL_NDEBUG 0
+#endif
+
+/** @endcond */
+
+/* Here we go... */
+#undef RUBY_DEBUG
+#undef RUBY_NDEBUG
+#undef NDEBUG
+#if defined(__DOXYGEN__)
+# /** Define this macro when you want assertions. */
+# define RUBY_DEBUG 0
+# /** Define this macro when you don't want assertions. */
+# define NDEBUG
+# /** This macro is basically the same as #NDEBUG */
+# define RUBY_NDEBUG 1
+
+#elif (RBIMPL_NDEBUG == 1) && (RBIMPL_RUBY_DEBUG == 0)
+# /* Assertions disabled as per request, no conflicts. */
+# define RUBY_DEBUG 0
+# define RUBY_NDEBUG 1
+# define NDEBUG
+
+#elif (RBIMPL_NDEBUG == 0) && (RBIMPL_RUBY_DEBUG == 1)
+# /* Assertions enabled as per request, no conflicts. */
+# define RUBY_DEBUG 1
+# define RUBY_NDEBUG 0
+# /* keep NDEBUG undefined */
+
+#elif (RBIMPL_NDEBUG == 0) && (RBIMPL_RUBY_DEBUG == 0)
+# /* The (*1) situation in above diagram. */
+# define RUBY_DEBUG 0
+# define RUBY_NDEBUG 1
+# define NDEBUG
+
+#elif (RBIMPL_NDEBUG == 1) && (RBIMPL_RUBY_DEBUG == 1)
+# /* The (*2) situation in above diagram. */
+# define RUBY_DEBUG 1
+# define RUBY_NDEBUG 0
+# /* keep NDEBUG undefined */
+
+# if defined(_MSC_VER)
+#  pragma message("NDEBUG is ignored because RUBY_DEBUG>0.")
+# elif defined(__GNUC__)
+#  pragma GCC warning "NDEBUG is ignored because RUBY_DEBUG>0."
+# else
+#  error NDEBUG is ignored because RUBY_DEBUG>0.
+# endif
+#endif
+#undef RBIMPL_NDEBUG
+#undef RBIMPL_RUBY_DEBUG
+
+/** @cond INTERNAL_MACRO */
+#define RBIMPL_ASSERT_NOTHING RBIMPL_CAST((void)0)
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+RBIMPL_ATTR_NORETURN()
+RBIMPL_ATTR_COLD()
+void rb_assert_failure(const char *file, int line, const char *name, const char *expr);
+RBIMPL_SYMBOL_EXPORT_END()
+
+#ifdef RUBY_FUNCTION_NAME_STRING
+# define RBIMPL_ASSERT_FUNC RUBY_FUNCTION_NAME_STRING
+#else
+# define RBIMPL_ASSERT_FUNC RBIMPL_CAST((const char *)0)
+#endif
+
+/** @endcond */
+
+/**
+ * Prints the given message, and terminates the entire process abnormally.
+ *
+ * @param  mesg  The message to display.
+ */
+#define RUBY_ASSERT_FAIL(mesg) \
+    rb_assert_failure(__FILE__, __LINE__, RBIMPL_ASSERT_FUNC, mesg)
+
+/**
+ * Asserts that the expression is truthy.  If not aborts with the message.
+ *
+ * @param  expr  What supposedly evaluates to true.
+ * @param  mesg  The message to display on failure.
+ */
+#define RUBY_ASSERT_MESG(expr, mesg) \
+    (RB_LIKELY(expr) ? RBIMPL_ASSERT_NOTHING : RUBY_ASSERT_FAIL(mesg))
+
+/**
+ * A variant of #RUBY_ASSERT that does not interface with #RUBY_DEBUG.
+ *
+ * @copydetails #RUBY_ASSERT
+ */
+#define RUBY_ASSERT_ALWAYS(expr) RUBY_ASSERT_MESG((expr), #expr)
+
+/**
+ * Asserts that the given expression is truthy if and only if #RUBY_DEBUG is truthy.
+ *
+ * @param  expr  What supposedly evaluates to true.
+ */
+#if RUBY_DEBUG
+# define RUBY_ASSERT(expr) RUBY_ASSERT_MESG((expr), #expr)
+#else
+# define RUBY_ASSERT(expr) RBIMPL_ASSERT_NOTHING
+#endif
+
+/**
+ * A  variant  of   #RUBY_ASSERT  that  interfaces  with   #NDEBUG  instead  of
+ * #RUBY_DEBUG.  This almost resembles `assert`  C standard macro, except minor
+ * implementation details.
+ *
+ * @copydetails #RUBY_ASSERT
+ */
+/* Currently  `RUBY_DEBUG == ! defined(NDEBUG)` is  always true.   There is  no
+ * difference any longer between this one and `RUBY_ASSERT`. */
+#if defined(NDEBUG)
+# define RUBY_ASSERT_NDEBUG(expr) RBIMPL_ASSERT_NOTHING
+#else
+# define RUBY_ASSERT_NDEBUG(expr) RUBY_ASSERT_MESG((expr), #expr)
+#endif
+
+/**
+ * @copydoc #RUBY_ASSERT_WHEN
+ * @param  mesg  The message to display on failure.
+ */
+#if RUBY_DEBUG
+# define RUBY_ASSERT_MESG_WHEN(cond, expr, mesg) RUBY_ASSERT_MESG((expr), (mesg))
+#else
+# define RUBY_ASSERT_MESG_WHEN(cond, expr, mesg) \
+    ((cond) ? RUBY_ASSERT_MESG((expr), (mesg)) : RBIMPL_ASSERT_NOTHING)
+#endif
+
+/**
+ * A variant  of #RUBY_ASSERT  that asserts when  either #RUBY_DEBUG  or `cond`
+ * parameter is truthy.
+ *
+ * @param  cond  Extra condition that shall hold for assertion to take effect.
+ * @param  expr  What supposedly evaluates to true.
+ */
+#define RUBY_ASSERT_WHEN(cond, expr) RUBY_ASSERT_MESG_WHEN((cond), (expr), #expr)
+
+/**
+ * This is either #RUBY_ASSERT or #RBIMPL_ASSUME, depending on #RUBY_DEBUG.
+ *
+ * @copydetails #RUBY_ASSERT
+ */
+#if RUBY_DEBUG
+# define RBIMPL_ASSERT_OR_ASSUME(expr) RUBY_ASSERT_ALWAYS(expr)
+#elif RBIMPL_COMPILER_BEFORE(Clang, 7, 0, 0)
+# /* See commit 67d259c5dccd31fe49d417fec169977712ffdf10 */
+# define RBIMPL_ASSERT_OR_ASSUME(expr) RBIMPL_ASSERT_NOTHING
+#elif defined(RUBY_ASSERT_NOASSUME)
+# /* See commit d300a734414ef6de7e8eb563b7cc4389c455ed08 */
+# define RBIMPL_ASSERT_OR_ASSUME(expr) RBIMPL_ASSERT_NOTHING
+#elif ! defined(RBIMPL_HAVE___ASSUME)
+# define RBIMPL_ASSERT_OR_ASSUME(expr) RBIMPL_ASSERT_NOTHING
+#else
+# define RBIMPL_ASSERT_OR_ASSUME(expr) RBIMPL_ASSUME(expr)
+#endif
+
+#endif /* RUBY_ASSERT_H */

libs/libruby/ruby/atomic.h

@@ -0,0 +1,890 @@
+#ifndef RUBY_ATOMIC_H                                /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_ATOMIC_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Atomic operations
+ *
+ * Basically, if  we could assume  either C11 or  C++11, these macros  are just
+ * redundant.  Sadly we cannot.  We have to do them ourselves.
+ */
+
+#include "ruby/internal/config.h"
+
+#ifdef STDC_HEADERS
+# include <stddef.h>            /* size_t */
+#endif
+
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>         /* ssize_t */
+#endif
+
+#if RBIMPL_COMPILER_SINCE(MSVC, 13, 0, 0)
+# pragma intrinsic(_InterlockedOr)
+#elif defined(__sun) && defined(HAVE_ATOMIC_H)
+# include <atomic.h>
+#endif
+
+#include "ruby/assert.h"
+#include "ruby/backward/2/limits.h"
+#include "ruby/internal/attr/artificial.h"
+#include "ruby/internal/attr/noalias.h"
+#include "ruby/internal/attr/nonnull.h"
+#include "ruby/internal/compiler_since.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/value.h"
+#include "ruby/internal/static_assert.h"
+#include "ruby/internal/stdbool.h"
+
+/*
+ * Asserts that  your environment supports  more than one atomic  types.  These
+ * days systems tend to have such property  (C11 was a standard of decades ago,
+ * right?) but we still support older ones.
+ */
+#if defined(__DOXYGEN__) || defined(HAVE_GCC_ATOMIC_BUILTINS) || defined(HAVE_GCC_SYNC_BUILTINS)
+# define RUBY_ATOMIC_GENERIC_MACRO 1
+#endif
+
+/**
+ * Type  that  is eligible  for  atomic  operations.   Depending on  your  host
+ * platform you might have  more than one such type, but we  choose one of them
+ * anyways.
+ */
+#if defined(__DOXYGEN__)
+using rb_atomic_t = std::atomic<unsigned>;
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
+typedef unsigned int rb_atomic_t;
+#elif defined(HAVE_GCC_SYNC_BUILTINS)
+typedef unsigned int rb_atomic_t;
+#elif defined(_WIN32)
+typedef LONG rb_atomic_t;
+#elif defined(__sun) && defined(HAVE_ATOMIC_H)
+typedef unsigned int rb_atomic_t;
+#else
+# error No atomic operation found
+#endif
+
+/**
+ * Atomically replaces the  value pointed by `var` with the  result of addition
+ * of `val` to the old value of `var`.
+ *
+ * @param   var  A variable of ::rb_atomic_t.
+ * @param   val  Value to add.
+ * @return  What was stored in `var` before the addition.
+ * @post    `var` holds `var + val`.
+ */
+#define RUBY_ATOMIC_FETCH_ADD(var, val) rbimpl_atomic_fetch_add(&(var), (val))
+
+/**
+ * Atomically  replaces  the  value  pointed   by  `var`  with  the  result  of
+ * subtraction of `val` to the old value of `var`.
+ *
+ * @param   var  A variable of ::rb_atomic_t.
+ * @param   val  Value to subtract.
+ * @return  What was stored in `var` before the subtraction.
+ * @post    `var` holds `var - val`.
+ */
+#define RUBY_ATOMIC_FETCH_SUB(var, val) rbimpl_atomic_fetch_sub(&(var), (val))
+
+/**
+ * Atomically  replaces  the  value  pointed   by  `var`  with  the  result  of
+ * bitwise OR between `val` and the old value of `var`.
+ *
+ * @param   var   A variable of ::rb_atomic_t.
+ * @param   val   Value to mix.
+ * @return  void
+ * @post    `var` holds `var | val`.
+ * @note    For portability, this macro can return void.
+ */
+#define RUBY_ATOMIC_OR(var, val) rbimpl_atomic_or(&(var), (val))
+
+/**
+ * Atomically replaces the value pointed by  `var` with `val`.  This is just an
+ * assignment, but you can additionally know the previous value.
+ *
+ * @param   var   A variable of ::rb_atomic_t.
+ * @param   val   Value to set.
+ * @return  What was stored in `var` before the assignment.
+ * @post    `var` holds `val`.
+ */
+#define RUBY_ATOMIC_EXCHANGE(var, val) rbimpl_atomic_exchange(&(var), (val))
+
+/**
+ * Atomic compare-and-swap.   This stores  `val` to  `var` if  and only  if the
+ * assignment changes  the value of `var`  from `oldval` to `newval`.   You can
+ * detect whether the assignment happened or not using the return value.
+ *
+ * @param   var        A variable of ::rb_atomic_t.
+ * @param   oldval     Expected value of `var` before the assignment.
+ * @param   newval     What you want to store at `var`.
+ * @retval  oldval     Successful assignment (`var` is now `newval`).
+ * @retval  otherwise  Something else is at `var`; not updated.
+ */
+#define RUBY_ATOMIC_CAS(var, oldval, newval) \
+    rbimpl_atomic_cas(&(var), (oldval), (newval))
+
+/**
+ * Identical to #RUBY_ATOMIC_EXCHANGE, except for the return type.
+ *
+ * @param   var   A variable of ::rb_atomic_t.
+ * @param   val   Value to set.
+ * @return  void
+ * @post    `var` holds `val`.
+ */
+#define RUBY_ATOMIC_SET(var, val) rbimpl_atomic_set(&(var), (val))
+
+/**
+ * Identical to #RUBY_ATOMIC_FETCH_ADD, except for the return type.
+ *
+ * @param   var  A variable of ::rb_atomic_t.
+ * @param   val  Value to add.
+ * @return  void
+ * @post    `var` holds `var + val`.
+ */
+#define RUBY_ATOMIC_ADD(var, val) rbimpl_atomic_add(&(var), (val))
+
+/**
+ * Identical to #RUBY_ATOMIC_FETCH_SUB, except for the return type.
+ *
+ * @param   var  A variable of ::rb_atomic_t.
+ * @param   val  Value to subtract.
+ * @return  void
+ * @post    `var` holds `var - val`.
+ */
+#define RUBY_ATOMIC_SUB(var, val) rbimpl_atomic_sub(&(var), (val))
+
+/**
+ * Atomically increments the value pointed by `var`.
+ *
+ * @param   var  A variable of ::rb_atomic_t.
+ * @return  void
+ * @post    `var` holds `var + 1`.
+ */
+#define RUBY_ATOMIC_INC(var) rbimpl_atomic_inc(&(var))
+
+/**
+ * Atomically decrements the value pointed by `var`.
+ *
+ * @param   var  A variable of ::rb_atomic_t.
+ * @return  void
+ * @post    `var` holds `var - 1`.
+ */
+#define RUBY_ATOMIC_DEC(var) rbimpl_atomic_dec(&(var))
+
+/**
+ * Identical to #RUBY_ATOMIC_INC,  except it expects its  argument is `size_t`.
+ * There are cases where ::rb_atomic_t is  32bit while `size_t` is 64bit.  This
+ * should be used for size related operations to support such platforms.
+ *
+ * @param   var  A variable of `size_t`.
+ * @return  void
+ * @post    `var` holds `var + 1`.
+ */
+#define RUBY_ATOMIC_SIZE_INC(var) rbimpl_atomic_size_inc(&(var))
+
+/**
+ * Identical to #RUBY_ATOMIC_DEC,  except it expects its  argument is `size_t`.
+ * There are cases where ::rb_atomic_t is  32bit while `size_t` is 64bit.  This
+ * should be used for size related operations to support such platforms.
+ *
+ * @param   var  A variable of `size_t`.
+ * @return  void
+ * @post    `var` holds `var - 1`.
+ */
+#define RUBY_ATOMIC_SIZE_DEC(var) rbimpl_atomic_size_dec(&(var))
+
+/**
+ * Identical  to #RUBY_ATOMIC_EXCHANGE,  except  it expects  its arguments  are
+ * `size_t`.  There  are cases where  ::rb_atomic_t is 32bit while  `size_t` is
+ * 64bit.  This  should be  used for  size related  operations to  support such
+ * platforms.
+ *
+ * @param   var  A variable of `size_t`.
+ * @param   val   Value to set.
+ * @return  What was stored in `var` before the assignment.
+ * @post    `var` holds `val`.
+ */
+#define RUBY_ATOMIC_SIZE_EXCHANGE(var, val) \
+    rbimpl_atomic_size_exchange(&(var), (val))
+
+/**
+ * Identical to #RUBY_ATOMIC_CAS, except it expects its arguments are `size_t`.
+ * There are cases where ::rb_atomic_t is 32bit while `size_t` is 64bit.  This
+ * should be used for size related operations to support such platforms.
+ *
+ * @param   var        A variable of `size_t`.
+ * @param   oldval     Expected value of `var` before the assignment.
+ * @param   newval     What you want to store at `var`.
+ * @retval  oldval     Successful assignment (`var` is now `newval`).
+ * @retval  otherwise  Something else is at `var`; not updated.
+ */
+#define RUBY_ATOMIC_SIZE_CAS(var, oldval, newval) \
+    rbimpl_atomic_size_cas(&(var), (oldval), (newval))
+
+/**
+ * Identical to #RUBY_ATOMIC_ADD, except it expects its arguments are `size_t`.
+ * There are cases where ::rb_atomic_t is 32bit while `size_t` is 64bit.  This
+ * should be used for size related operations to support such platforms.
+ *
+ * @param   var  A variable of `size_t`.
+ * @param   val  Value to add.
+ * @return  void
+ * @post    `var` holds `var + val`.
+ */
+#define RUBY_ATOMIC_SIZE_ADD(var, val) rbimpl_atomic_size_add(&(var), (val))
+
+/**
+ * Identical to #RUBY_ATOMIC_SUB, except it expects its arguments are `size_t`.
+ * There are cases where ::rb_atomic_t is 32bit while `size_t` is 64bit.  This
+ * should be used for size related operations to support such platforms.
+ *
+ * @param   var  A variable of `size_t`.
+ * @param   val  Value to subtract.
+ * @return  void
+ * @post    `var` holds `var - val`.
+ */
+#define RUBY_ATOMIC_SIZE_SUB(var, val) rbimpl_atomic_size_sub(&(var), (val))
+
+/**
+ * Identical  to #RUBY_ATOMIC_EXCHANGE,  except  it expects  its arguments  are
+ * `void*`.   There are  cases where  ::rb_atomic_t is  32bit while  `void*` is
+ * 64bit.  This should  be used for pointer related operations  to support such
+ * platforms.
+ *
+ * @param   var  A variable of `void *`.
+ * @param   val   Value to set.
+ * @return  What was stored in `var` before the assignment.
+ * @post    `var` holds `val`.
+ *
+ * @internal
+ *
+ * :FIXME: this `(void*)` cast is evil!  However `void*` is incompatible with
+ * some pointers, most notably function pointers.
+ */
+#define RUBY_ATOMIC_PTR_EXCHANGE(var, val) \
+    RBIMPL_CAST(rbimpl_atomic_ptr_exchange((void **)&(var), (void *)val))
+
+/**
+ * Identical to #RUBY_ATOMIC_CAS, except it expects its arguments are `void*`.
+ * There are cases where ::rb_atomic_t is 32bit while `void*` is 64bit.  This
+ * should be used for size related operations to support such platforms.
+ *
+ * @param   var        A variable of `void*`.
+ * @param   oldval     Expected value of `var` before the assignment.
+ * @param   newval     What you want to store at `var`.
+ * @retval  oldval     Successful assignment (`var` is now `newval`).
+ * @retval  otherwise  Something else is at `var`; not updated.
+ */
+#define RUBY_ATOMIC_PTR_CAS(var, oldval, newval) \
+    RBIMPL_CAST(rbimpl_atomic_ptr_cas((void **)&(var), (oldval), (newval)))
+
+/**
+ * Identical  to #RUBY_ATOMIC_EXCHANGE,  except  it expects  its arguments  are
+ * ::VALUE.   There are  cases where  ::rb_atomic_t is  32bit while  ::VALUE is
+ * 64bit.  This should  be used for pointer related operations  to support such
+ * platforms.
+ *
+ * @param   var  A variable of ::VALUE.
+ * @param   val   Value to set.
+ * @return  What was stored in `var` before the assignment.
+ * @post    `var` holds `val`.
+ */
+#define RUBY_ATOMIC_VALUE_EXCHANGE(var, val) \
+    rbimpl_atomic_value_exchange(&(var), (val))
+
+/**
+ * Identical to #RUBY_ATOMIC_CAS, except it  expects its arguments are ::VALUE.
+ * There are cases  where ::rb_atomic_t is 32bit while ::VALUE  is 64bit.  This
+ * should be used for size related operations to support such platforms.
+ *
+ * @param   var        A variable of `void*`.
+ * @param   oldval     Expected value of `var` before the assignment.
+ * @param   newval     What you want to store at `var`.
+ * @retval  oldval     Successful assignment (`var` is now `newval`).
+ * @retval  otherwise  Something else is at `var`; not updated.
+ */
+#define RUBY_ATOMIC_VALUE_CAS(var, oldval, newval) \
+    rbimpl_atomic_value_cas(&(var), (oldval), (newval))
+
+/** @cond INTERNAL_MACRO */
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline rb_atomic_t
+rbimpl_atomic_fetch_add(volatile rb_atomic_t *ptr, rb_atomic_t val)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
+    return __atomic_fetch_add(ptr, val, __ATOMIC_SEQ_CST);
+
+#elif defined(HAVE_GCC_SYNC_BUILTINS)
+    return __sync_fetch_and_add(ptr, val);
+
+#elif defined(_WIN32)
+    return InterlockedExchangeAdd(ptr, val);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H)
+    /*
+     * `atomic_add_int_nv` takes its second argument as `int`!  Meanwhile our
+     * `rb_atomic_t` is unsigned.  We cannot pass `val` as-is.  We have to
+     * manually check integer overflow.
+     */
+    RBIMPL_ASSERT_OR_ASSUME(val <= INT_MAX);
+    return atomic_add_int_nv(ptr, val) - val;
+
+#else
+# error Unsupported platform.
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline void
+rbimpl_atomic_add(volatile rb_atomic_t *ptr, rb_atomic_t val)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
+    /*
+     * GCC on amd64 is smart enough to detect this `__atomic_add_fetch`'s
+     * return value is not used, then compiles it into single `LOCK ADD`
+     * instruction.
+     */
+    __atomic_add_fetch(ptr, val, __ATOMIC_SEQ_CST);
+
+#elif defined(HAVE_GCC_SYNC_BUILTINS)
+    __sync_add_and_fetch(ptr, val);
+
+#elif defined(_WIN32)
+    /*
+     * `InterlockedExchangeAdd` is `LOCK XADD`.  It seems there also is
+     * `_InterlockedAdd` intrinsic in ARM Windows but not for x86?  Sticking to
+     * `InterlockedExchangeAdd` for better portability.
+     */
+    InterlockedExchangeAdd(ptr, val);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H)
+    /* Ditto for `atomic_add_int_nv`. */
+    RBIMPL_ASSERT_OR_ASSUME(val <= INT_MAX);
+    atomic_add_int(ptr, val);
+
+#else
+# error Unsupported platform.
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline void
+rbimpl_atomic_size_add(volatile size_t *ptr, size_t val)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
+    __atomic_add_fetch(ptr, val, __ATOMIC_SEQ_CST);
+
+#elif defined(HAVE_GCC_SYNC_BUILTINS)
+    __sync_add_and_fetch(ptr, val);
+
+#elif defined(_WIN32) && defined(_M_AMD64)
+    /* Ditto for `InterlockeExchangedAdd`. */
+    InterlockedExchangeAdd64(ptr, val);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H) && (defined(_LP64) || defined(_I32LPx))
+    /* Ditto for `atomic_add_int_nv`. */
+    RBIMPL_ASSERT_OR_ASSUME(val <= LONG_MAX);
+    atomic_add_long(ptr, val);
+
+#else
+    RBIMPL_STATIC_ASSERT(size_of_rb_atomic_t, sizeof *ptr == sizeof(rb_atomic_t));
+
+    volatile rb_atomic_t *const tmp = RBIMPL_CAST((volatile rb_atomic_t *)ptr);
+    rbimpl_atomic_add(tmp, val);
+
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline void
+rbimpl_atomic_inc(volatile rb_atomic_t *ptr)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS) || defined(HAVE_GCC_SYNC_BUILTINS)
+    rbimpl_atomic_add(ptr, 1);
+
+#elif defined(_WIN32)
+    InterlockedIncrement(ptr);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H)
+    atomic_inc_uint(ptr);
+
+#else
+    rbimpl_atomic_add(ptr, 1);
+
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline void
+rbimpl_atomic_size_inc(volatile size_t *ptr)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS) || defined(HAVE_GCC_SYNC_BUILTINS)
+    rbimpl_atomic_size_add(ptr, 1);
+
+#elif defined(_WIN32) && defined(_M_AMD64)
+    InterlockedIncrement64(ptr);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H) && (defined(_LP64) || defined(_I32LPx))
+    atomic_inc_ulong(ptr);
+
+#else
+    rbimpl_atomic_size_add(ptr, 1);
+
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline rb_atomic_t
+rbimpl_atomic_fetch_sub(volatile rb_atomic_t *ptr, rb_atomic_t val)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
+    return __atomic_fetch_sub(ptr, val, __ATOMIC_SEQ_CST);
+
+#elif defined(HAVE_GCC_SYNC_BUILTINS)
+    return __sync_fetch_and_sub(ptr, val);
+
+#elif defined(_WIN32)
+    /* rb_atomic_t is signed here! Safe to do `-val`. */
+    return InterlockedExchangeAdd(ptr, -val);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H)
+    /* Ditto for `rbimpl_atomic_fetch_add`. */
+    const signed neg = -1;
+    RBIMPL_ASSERT_OR_ASSUME(val <= INT_MAX);
+    return atomic_add_int_nv(ptr, neg * val) + val;
+
+#else
+# error Unsupported platform.
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline void
+rbimpl_atomic_sub(volatile rb_atomic_t *ptr, rb_atomic_t val)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
+    __atomic_sub_fetch(ptr, val, __ATOMIC_SEQ_CST);
+
+#elif defined(HAVE_GCC_SYNC_BUILTINS)
+    __sync_sub_and_fetch(ptr, val);
+
+#elif defined(_WIN32)
+    InterlockedExchangeAdd(ptr, -val);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H)
+    const signed neg = -1;
+    RBIMPL_ASSERT_OR_ASSUME(val <= INT_MAX);
+    atomic_add_int(ptr, neg * val);
+
+#else
+# error Unsupported platform.
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline void
+rbimpl_atomic_size_sub(volatile size_t *ptr, size_t val)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
+    __atomic_sub_fetch(ptr, val, __ATOMIC_SEQ_CST);
+
+#elif defined(HAVE_GCC_SYNC_BUILTINS)
+    __sync_sub_and_fetch(ptr, val);
+
+#elif defined(_WIN32) && defined(_M_AMD64)
+    const ssize_t neg = -1;
+    InterlockedExchangeAdd64(ptr, neg * val);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H) && (defined(_LP64) || defined(_I32LPx))
+    const signed neg = -1;
+    RBIMPL_ASSERT_OR_ASSUME(val <= LONG_MAX);
+    atomic_add_long(ptr, neg * val);
+
+#else
+    RBIMPL_STATIC_ASSERT(size_of_rb_atomic_t, sizeof *ptr == sizeof(rb_atomic_t));
+
+    volatile rb_atomic_t *const tmp = RBIMPL_CAST((volatile rb_atomic_t *)ptr);
+    rbimpl_atomic_sub(tmp, val);
+
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline void
+rbimpl_atomic_dec(volatile rb_atomic_t *ptr)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS) || defined(HAVE_GCC_SYNC_BUILTINS)
+    rbimpl_atomic_sub(ptr, 1);
+
+#elif defined(_WIN32)
+    InterlockedDecrement(ptr);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H)
+    atomic_dec_uint(ptr);
+
+#else
+    rbimpl_atomic_sub(ptr, 1);
+
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline void
+rbimpl_atomic_size_dec(volatile size_t *ptr)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS) || defined(HAVE_GCC_SYNC_BUILTINS)
+    rbimpl_atomic_size_sub(ptr, 1);
+
+#elif defined(_WIN32) && defined(_M_AMD64)
+    InterlockedDecrement64(ptr);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H) && (defined(_LP64) || defined(_I32LPx))
+    atomic_dec_ulong(ptr);
+
+#else
+    rbimpl_atomic_size_sub(ptr, 1);
+
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline void
+rbimpl_atomic_or(volatile rb_atomic_t *ptr, rb_atomic_t val)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
+    __atomic_or_fetch(ptr, val, __ATOMIC_SEQ_CST);
+
+#elif defined(HAVE_GCC_SYNC_BUILTINS)
+    __sync_or_and_fetch(ptr, val);
+
+#elif RBIMPL_COMPILER_SINCE(MSVC, 13, 0, 0)
+    _InterlockedOr(ptr, val);
+
+#elif defined(_WIN32) && defined(__GNUC__)
+    /* This was for old MinGW.  Maybe not needed any longer? */
+    __asm__(
+        "lock\n\t"
+        "orl\t%1, %0"
+        : "=m"(ptr)
+        : "Ir"(val));
+
+#elif defined(_WIN32) && defined(_M_IX86)
+    __asm mov eax, ptr;
+    __asm mov ecx, val;
+    __asm lock or [eax], ecx;
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H)
+    atomic_or_uint(ptr, val);
+
+#else
+# error Unsupported platform.
+#endif
+}
+
+/* Nobody uses this but for theoretical backwards compatibility... */
+#if RBIMPL_COMPILER_BEFORE(MSVC, 13, 0, 0)
+static inline rb_atomic_t
+rb_w32_atomic_or(volatile rb_atomic_t *var, rb_atomic_t val)
+{
+    return rbimpl_atomic_or(var, val);
+}
+#endif
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline rb_atomic_t
+rbimpl_atomic_exchange(volatile rb_atomic_t *ptr, rb_atomic_t val)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
+    return __atomic_exchange_n(ptr, val, __ATOMIC_SEQ_CST);
+
+#elif defined(HAVE_GCC_SYNC_BUILTINS)
+    return __sync_lock_test_and_set(ptr, val);
+
+#elif defined(_WIN32)
+    return InterlockedExchange(ptr, val);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H)
+    return atomic_swap_uint(ptr, val);
+
+#else
+# error Unsupported platform.
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline size_t
+rbimpl_atomic_size_exchange(volatile size_t *ptr, size_t val)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
+    return __atomic_exchange_n(ptr, val, __ATOMIC_SEQ_CST);
+
+#elif defined(HAVE_GCC_SYNC_BUILTINS)
+    return __sync_lock_test_and_set(ptr, val);
+
+#elif defined(_WIN32) && defined(_M_AMD64)
+    return InterlockedExchange64(ptr, val);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H) && (defined(_LP64) || defined(_I32LPx))
+    return atomic_swap_ulong(ptr, val);
+
+#else
+    RBIMPL_STATIC_ASSERT(size_of_size_t, sizeof *ptr == sizeof(rb_atomic_t));
+
+    volatile rb_atomic_t *const tmp = RBIMPL_CAST((volatile rb_atomic_t *)ptr);
+    const rb_atomic_t ret = rbimpl_atomic_exchange(tmp, val);
+    return RBIMPL_CAST((size_t)ret);
+
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline void *
+rbimpl_atomic_ptr_exchange(void *volatile *ptr, const void *val)
+{
+#if 0
+
+#elif defined(InterlockedExchangePointer)
+    /* const_cast */
+    PVOID *pptr = RBIMPL_CAST((PVOID *)ptr);
+    PVOID pval = RBIMPL_CAST((PVOID)val);
+    return InterlockedExchangePointer(pptr, pval);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H)
+    return atomic_swap_ptr(ptr, RBIMPL_CAST((void *)val));
+
+#else
+    RBIMPL_STATIC_ASSERT(sizeof_voidp, sizeof *ptr == sizeof(size_t));
+
+    const size_t sval = RBIMPL_CAST((size_t)val);
+    volatile size_t *const sptr = RBIMPL_CAST((volatile size_t *)ptr);
+    const size_t sret = rbimpl_atomic_size_exchange(sptr, sval);
+    return RBIMPL_CAST((void *)sret);
+
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline VALUE
+rbimpl_atomic_value_exchange(volatile VALUE *ptr, VALUE val)
+{
+    RBIMPL_STATIC_ASSERT(sizeof_value, sizeof *ptr == sizeof(size_t));
+
+    const size_t sval = RBIMPL_CAST((size_t)val);
+    volatile size_t *const sptr = RBIMPL_CAST((volatile size_t *)ptr);
+    const size_t sret = rbimpl_atomic_size_exchange(sptr, sval);
+    return RBIMPL_CAST((VALUE)sret);
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline void
+rbimpl_atomic_set(volatile rb_atomic_t *ptr, rb_atomic_t val)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
+    __atomic_store_n(ptr, val, __ATOMIC_SEQ_CST);
+
+#else
+    /* Maybe std::atomic<rb_atomic_t>::store can be faster? */
+    rbimpl_atomic_exchange(ptr, val);
+
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline rb_atomic_t
+rbimpl_atomic_cas(volatile rb_atomic_t *ptr, rb_atomic_t oldval, rb_atomic_t newval)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
+    __atomic_compare_exchange_n(
+        ptr, &oldval, newval, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
+    return oldval;
+
+#elif defined(HAVE_GCC_SYNC_BUILTINS)
+    return __sync_val_compare_and_swap(ptr, oldval, newval);
+
+#elif RBIMPL_COMPILER_SINCE(MSVC, 13, 0, 0)
+    return InterlockedCompareExchange(ptr, newval, oldval);
+
+#elif defined(_WIN32)
+    PVOID *pptr = RBIMPL_CAST((PVOID *)ptr);
+    PVOID pold = RBIMPL_CAST((PVOID)oldval);
+    PVOID pnew = RBIMPL_CAST((PVOID)newval);
+    PVOID pret = InterlockedCompareExchange(pptr, pnew, pold);
+    return RBIMPL_CAST((rb_atomic_t)pret);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H)
+    return atomic_cas_uint(ptr, oldval, newval);
+
+#else
+# error Unsupported platform.
+#endif
+}
+
+/* Nobody uses this but for theoretical backwards compatibility... */
+#if RBIMPL_COMPILER_BEFORE(MSVC, 13, 0, 0)
+static inline rb_atomic_t
+rb_w32_atomic_cas(volatile rb_atomic_t *var, rb_atomic_t oldval, rb_atomic_t newval)
+{
+    return rbimpl_atomic_cas(var, oldval, newval);
+}
+#endif
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline size_t
+rbimpl_atomic_size_cas(volatile size_t *ptr, size_t oldval, size_t newval)
+{
+#if 0
+
+#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
+    __atomic_compare_exchange_n(
+        ptr, &oldval, newval, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
+    return oldval;
+
+#elif defined(HAVE_GCC_SYNC_BUILTINS)
+    return __sync_val_compare_and_swap(ptr, oldval, newval);
+
+#elif defined(_WIN32) && defined(_M_AMD64)
+    return InterlockedCompareExchange64(ptr, newval, oldval);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H) && (defined(_LP64) || defined(_I32LPx))
+    return atomic_cas_ulong(ptr, oldval, newval);
+
+#else
+    RBIMPL_STATIC_ASSERT(size_of_size_t, sizeof *ptr == sizeof(rb_atomic_t));
+
+    volatile rb_atomic_t *tmp = RBIMPL_CAST((volatile rb_atomic_t *)ptr);
+    return rbimpl_atomic_cas(tmp, oldval, newval);
+
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline void *
+rbimpl_atomic_ptr_cas(void **ptr, const void *oldval, const void *newval)
+{
+#if 0
+
+#elif defined(InterlockedExchangePointer)
+    /* ... Can we say that InterlockedCompareExchangePtr surly exists when
+     * InterlockedExchangePointer is defined?  Seems so but...?*/
+    PVOID *pptr = RBIMPL_CAST((PVOID *)ptr);
+    PVOID pold = RBIMPL_CAST((PVOID)oldval);
+    PVOID pnew = RBIMPL_CAST((PVOID)newval);
+    return InterlockedCompareExchangePointer(pptr, pnew, pold);
+
+#elif defined(__sun) && defined(HAVE_ATOMIC_H)
+    void *pold = RBIMPL_CAST((void *)oldval);
+    void *pnew = RBIMPL_CAST((void *)newval);
+    return atomic_cas_ptr(ptr, pold, pnew);
+
+
+#else
+    RBIMPL_STATIC_ASSERT(sizeof_voidp, sizeof *ptr == sizeof(size_t));
+
+    const size_t snew = RBIMPL_CAST((size_t)newval);
+    const size_t sold = RBIMPL_CAST((size_t)oldval);
+    volatile size_t *const sptr = RBIMPL_CAST((volatile size_t *)ptr);
+    const size_t sret = rbimpl_atomic_size_cas(sptr, sold, snew);
+    return RBIMPL_CAST((void *)sret);
+
+#endif
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+RBIMPL_ATTR_NOALIAS()
+RBIMPL_ATTR_NONNULL((1))
+static inline VALUE
+rbimpl_atomic_value_cas(volatile VALUE *ptr, VALUE oldval, VALUE newval)
+{
+    RBIMPL_STATIC_ASSERT(sizeof_value, sizeof *ptr == sizeof(size_t));
+
+    const size_t snew = RBIMPL_CAST((size_t)newval);
+    const size_t sold = RBIMPL_CAST((size_t)oldval);
+    volatile size_t *const sptr = RBIMPL_CAST((volatile size_t *)ptr);
+    const size_t sret = rbimpl_atomic_size_cas(sptr, sold, snew);
+    return RBIMPL_CAST((VALUE)sret);
+}
+/** @endcond */
+#endif /* RUBY_ATOMIC_H */

libs/libruby/ruby/backward.h

@@ -0,0 +1,25 @@
+#ifndef RUBY_RUBY_BACKWARD_H                         /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_RUBY_BACKWARD_H 1
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ */
+#include "ruby/internal/value.h"
+#include "ruby/internal/interpreter.h"
+#include "ruby/backward/2/attributes.h"
+
+#define RBIMPL_ATTR_DEPRECATED_SINCE(ver) RBIMPL_ATTR_DEPRECATED(("since " #ver))
+#define RBIMPL_ATTR_DEPRECATED_INTERNAL(ver) RBIMPL_ATTR_DEPRECATED(("since "#ver", also internal"))
+#define RBIMPL_ATTR_DEPRECATED_INTERNAL_ONLY() RBIMPL_ATTR_DEPRECATED(("only for internal use"))
+
+RBIMPL_ATTR_DEPRECATED_INTERNAL_ONLY() void rb_clear_constant_cache(void);
+
+/* from version.c */
+#if defined(RUBY_SHOW_COPYRIGHT_TO_DIE) && !!(RUBY_SHOW_COPYRIGHT_TO_DIE+0)
+# error RUBY_SHOW_COPYRIGHT_TO_DIE is deprecated
+#endif
+
+#endif /* RUBY_RUBY_BACKWARD_H */

libs/libruby/ruby/backward/2/assume.h

@@ -0,0 +1,56 @@
+#ifndef RUBY_BACKWARD2_ASSUME_H                      /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_BACKWARD2_ASSUME_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #ASSUME / #RB_LIKELY / #UNREACHABLE
+ */
+#include "ruby/internal/config.h"
+#include "ruby/internal/assume.h"
+#include "ruby/internal/has/builtin.h"
+
+#define ASSUME             RBIMPL_ASSUME             /**< @old{RBIMPL_ASSUME} */
+#define UNREACHABLE        RBIMPL_UNREACHABLE()      /**< @old{RBIMPL_UNREACHABLE} */
+#define UNREACHABLE_RETURN RBIMPL_UNREACHABLE_RETURN /**< @old{RBIMPL_UNREACHABLE_RETURN} */
+
+/* likely */
+#if RBIMPL_HAS_BUILTIN(__builtin_expect)
+/**
+ * Asserts that the given Boolean expression likely holds.
+ *
+ * @param  x  An expression that likely holds.
+ *
+ * @note  Consider this macro carefully.  It has been here since when CPUs were
+ *        like  babies,  but  contemporary  processors are  beasts.   They  are
+ *        smarter than  mare mortals like  us today.  Their  branch predictions
+ *        highly expectedly outperform your use of this macro.
+ */
+# define RB_LIKELY(x)   (__builtin_expect(!!(x), 1))
+
+/**
+ * Asserts that the given Boolean expression likely doesn't hold.
+ *
+ * @param  x  An expression that likely doesn't hold.
+ */
+# define RB_UNLIKELY(x) (__builtin_expect(!!(x), 0))
+#else
+# define RB_LIKELY(x)   (x)
+# define RB_UNLIKELY(x) (x)
+#endif
+
+#endif /* RUBY_BACKWARD2_ASSUME_H */

libs/libruby/ruby/backward/2/attributes.h

@@ -0,0 +1,165 @@
+#ifndef RUBY_BACKWARD2_ATTRIBUTES_H                  /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_BACKWARD2_ATTRIBUTES_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Various attribute-related macros.
+ *
+ * ### Q&A ###
+ *
+ * - Q: Why  are the  macros defined  in this  header file  so inconsistent  in
+ *      style?
+ *
+ * - A: Don't know.   Don't blame me.  Backward compatibility is  the key here.
+ *      I'm just preserving what they have been.
+ */
+#include "ruby/internal/config.h"
+#include "ruby/internal/attr/alloc_size.h"
+#include "ruby/internal/attr/cold.h"
+#include "ruby/internal/attr/const.h"
+#include "ruby/internal/attr/deprecated.h"
+#include "ruby/internal/attr/error.h"
+#include "ruby/internal/attr/forceinline.h"
+#include "ruby/internal/attr/format.h"
+#include "ruby/internal/attr/maybe_unused.h"
+#include "ruby/internal/attr/noinline.h"
+#include "ruby/internal/attr/nonnull.h"
+#include "ruby/internal/attr/noreturn.h"
+#include "ruby/internal/attr/pure.h"
+#include "ruby/internal/attr/restrict.h"
+#include "ruby/internal/attr/returns_nonnull.h"
+#include "ruby/internal/attr/warning.h"
+#include "ruby/internal/has/attribute.h"
+
+/* function attributes */
+#undef CONSTFUNC
+#define CONSTFUNC(x) RBIMPL_ATTR_CONST() x
+
+#undef PUREFUNC
+#define PUREFUNC(x) RBIMPL_ATTR_PURE() x
+
+#undef DEPRECATED
+#define DEPRECATED(x) RBIMPL_ATTR_DEPRECATED(("")) x
+
+#undef DEPRECATED_BY
+#define DEPRECATED_BY(n,x) RBIMPL_ATTR_DEPRECATED(("by: " # n)) x
+
+#undef DEPRECATED_TYPE
+#if defined(__GNUC__)
+# define DEPRECATED_TYPE(mesg, decl)                      \
+    _Pragma("message \"DEPRECATED_TYPE is deprecated\""); \
+    decl RBIMPL_ATTR_DEPRECATED(mseg)
+#elif defined(_MSC_VER)
+# pragma deprecated(DEPRECATED_TYPE)
+# define DEPRECATED_TYPE(mesg, decl)                              \
+    __pragma(message(__FILE__"("STRINGIZE(__LINE__)"): warning: " \
+                     "DEPRECATED_TYPE is deprecated"))            \
+    decl RBIMPL_ATTR_DEPRECATED(mseg)
+#else
+# define DEPRECATED_TYPE(mesg, decl)                    \
+    <-<-"DEPRECATED_TYPE is deprecated"->->
+#endif
+
+#undef RUBY_CXX_DEPRECATED
+#define RUBY_CXX_DEPRECATED(mseg) RBIMPL_ATTR_DEPRECATED((mseg))
+
+#undef NOINLINE
+#define NOINLINE(x) RBIMPL_ATTR_NOINLINE() x
+
+#ifndef MJIT_HEADER
+# undef ALWAYS_INLINE
+# define ALWAYS_INLINE(x) RBIMPL_ATTR_FORCEINLINE() x
+#endif
+
+#undef ERRORFUNC
+#define ERRORFUNC(mesg, x) RBIMPL_ATTR_ERROR(mesg) x
+#if RBIMPL_HAS_ATTRIBUTE(error)
+# define HAVE_ATTRIBUTE_ERRORFUNC 1
+#endif
+
+#undef WARNINGFUNC
+#define WARNINGFUNC(mesg, x) RBIMPL_ATTR_WARNING(mesg) x
+#if RBIMPL_HAS_ATTRIBUTE(warning)
+# define HAVE_ATTRIBUTE_WARNINGFUNC 1
+#endif
+
+/*
+  cold attribute for code layout improvements
+  RUBY_FUNC_ATTRIBUTE not used because MSVC does not like nested func macros
+ */
+#undef COLDFUNC
+#define COLDFUNC RBIMPL_ATTR_COLD()
+
+#define PRINTF_ARGS(decl, string_index, first_to_check) \
+    RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, (string_index), (first_to_check)) \
+    decl
+
+#undef RUBY_ATTR_ALLOC_SIZE
+#define RUBY_ATTR_ALLOC_SIZE RBIMPL_ATTR_ALLOC_SIZE
+
+#undef RUBY_ATTR_MALLOC
+#define RUBY_ATTR_MALLOC RBIMPL_ATTR_RESTRICT()
+
+#undef RUBY_ATTR_RETURNS_NONNULL
+#define RUBY_ATTR_RETURNS_NONNULL RBIMPL_ATTR_RETURNS_NONNULL()
+
+#ifndef FUNC_MINIMIZED
+#define FUNC_MINIMIZED(x) x
+#endif
+
+#ifndef FUNC_UNOPTIMIZED
+#define FUNC_UNOPTIMIZED(x) x
+#endif
+
+#ifndef RUBY_ALIAS_FUNCTION_TYPE
+#define RUBY_ALIAS_FUNCTION_TYPE(type, prot, name, args) \
+    FUNC_MINIMIZED(type prot) {return (type)name args;}
+#endif
+
+#ifndef RUBY_ALIAS_FUNCTION_VOID
+#define RUBY_ALIAS_FUNCTION_VOID(prot, name, args) \
+    FUNC_MINIMIZED(void prot) {name args;}
+#endif
+
+#ifndef RUBY_ALIAS_FUNCTION
+#define RUBY_ALIAS_FUNCTION(prot, name, args) \
+    RUBY_ALIAS_FUNCTION_TYPE(VALUE, prot, name, args)
+#endif
+
+#undef RUBY_FUNC_NONNULL
+#define RUBY_FUNC_NONNULL(n, x) RBIMPL_ATTR_NONNULL(n) x
+
+#undef  NORETURN
+#define NORETURN(x) RBIMPL_ATTR_NORETURN() x
+#define NORETURN_STYLE_NEW
+
+#ifndef PACKED_STRUCT
+# define PACKED_STRUCT(x) x
+#endif
+
+#ifndef PACKED_STRUCT_UNALIGNED
+# if UNALIGNED_WORD_ACCESS
+#   define PACKED_STRUCT_UNALIGNED(x) PACKED_STRUCT(x)
+# else
+#   define PACKED_STRUCT_UNALIGNED(x) x
+# endif
+#endif
+
+#undef RB_UNUSED_VAR
+#define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
+
+#endif /* RUBY_BACKWARD2_ATTRIBUTES_H */

libs/libruby/ruby/backward/2/bool.h

@@ -0,0 +1,36 @@
+#ifndef RUBY_BACKWARD2_BOOL_H                        /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_BACKWARD2_BOOL_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines old TRUE / FALSE
+ */
+#include "ruby/internal/stdbool.h"
+
+#ifndef FALSE
+# define FALSE false
+#elif FALSE
+# error FALSE must be false
+#endif
+
+#ifndef TRUE
+# define TRUE true
+#elif ! TRUE
+# error TRUE must be true
+#endif
+
+#endif /* RUBY_BACKWARD2_BOOL_H */

libs/libruby/ruby/backward/2/gcc_version_since.h

@@ -0,0 +1,37 @@
+#ifndef RUBY_BACKWARD2_GCC_VERSION_SINCE_H           /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_BACKWARD2_GCC_VERSION_SINCE_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines old GCC_VERSION_SINCE
+ */
+#include "ruby/internal/compiler_since.h"
+
+#ifndef GCC_VERSION_SINCE
+#define GCC_VERSION_SINCE(x, y, z) RBIMPL_COMPILER_SINCE(GCC, (x), (y), (z))
+#endif
+
+#ifndef GCC_VERSION_BEFORE
+#define GCC_VERSION_BEFORE(x, y, z) \
+     (RBIMPL_COMPILER_BEFORE(GCC, (x), (y), (z)) || \
+     (RBIMPL_COMPILER_IS(GCC)                    && \
+    ((RBIMPL_COMPILER_VERSION_MAJOR == (x))      && \
+    ((RBIMPL_COMPILER_VERSION_MINOR == (y))      && \
+     (RBIMPL_COMPILER_VERSION_PATCH == (z))))))
+#endif
+
+#endif /* RUBY_BACKWARD2_GCC_VERSION_SINCE_H */

libs/libruby/ruby/backward/2/inttypes.h

@@ -0,0 +1,131 @@
+#ifndef RUBY_BACKWARD2_INTTYPES_H                    /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_BACKWARD2_INTTYPES_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      C99 shim for `<inttypes.h>`
+ */
+#include "ruby/internal/config.h"      /* PRI_LL_PREFIX etc. are here */
+
+#ifdef HAVE_INTTYPES_H
+# include <inttypes.h>
+#endif
+
+#include "ruby/internal/value.h"       /* PRI_VALUE_PREFIX is here. */
+
+#ifndef PRI_INT_PREFIX
+# define PRI_INT_PREFIX ""
+#endif
+
+#ifndef PRI_LONG_PREFIX
+# define PRI_LONG_PREFIX "l"
+#endif
+
+#ifndef PRI_SHORT_PREFIX
+# define PRI_SHORT_PREFIX "h"
+#endif
+
+#ifdef PRI_64_PREFIX
+# /* Take that. */
+#elif SIZEOF_LONG == 8
+# define PRI_64_PREFIX PRI_LONG_PREFIX
+#elif SIZEOF_LONG_LONG == 8
+# define PRI_64_PREFIX PRI_LL_PREFIX
+#endif
+
+#ifndef PRIdPTR
+# define PRIdPTR PRI_PTR_PREFIX"d"
+# define PRIiPTR PRI_PTR_PREFIX"i"
+# define PRIoPTR PRI_PTR_PREFIX"o"
+# define PRIuPTR PRI_PTR_PREFIX"u"
+# define PRIxPTR PRI_PTR_PREFIX"x"
+# define PRIXPTR PRI_PTR_PREFIX"X"
+#endif
+
+#ifndef RUBY_PRI_VALUE_MARK
+# define RUBY_PRI_VALUE_MARK "\v"
+#endif
+
+#if defined PRIdPTR && !defined PRI_VALUE_PREFIX
+# define PRIdVALUE PRIdPTR
+# define PRIoVALUE PRIoPTR
+# define PRIuVALUE PRIuPTR
+# define PRIxVALUE PRIxPTR
+# define PRIXVALUE PRIXPTR
+# define PRIsVALUE PRIiPTR"" RUBY_PRI_VALUE_MARK
+#else
+# define PRIdVALUE PRI_VALUE_PREFIX"d"
+# define PRIoVALUE PRI_VALUE_PREFIX"o"
+# define PRIuVALUE PRI_VALUE_PREFIX"u"
+# define PRIxVALUE PRI_VALUE_PREFIX"x"
+# define PRIXVALUE PRI_VALUE_PREFIX"X"
+# define PRIsVALUE PRI_VALUE_PREFIX"i" RUBY_PRI_VALUE_MARK
+#endif
+
+#ifndef PRI_VALUE_PREFIX
+# define PRI_VALUE_PREFIX ""
+#endif
+
+#ifdef PRI_TIMET_PREFIX
+# /* Take that. */
+#elif SIZEOF_TIME_T == SIZEOF_INT
+# define PRI_TIMET_PREFIX
+#elif SIZEOF_TIME_T == SIZEOF_LONG
+# define PRI_TIMET_PREFIX "l"
+#elif SIZEOF_TIME_T == SIZEOF_LONG_LONG
+# define PRI_TIMET_PREFIX PRI_LL_PREFIX
+#endif
+
+#ifdef PRI_PTRDIFF_PREFIX
+# /* Take that. */
+#elif SIZEOF_PTRDIFF_T == SIZEOF_INT
+# define PRI_PTRDIFF_PREFIX ""
+#elif SIZEOF_PTRDIFF_T == SIZEOF_LONG
+# define PRI_PTRDIFF_PREFIX "l"
+#elif SIZEOF_PTRDIFF_T == SIZEOF_LONG_LONG
+# define PRI_PTRDIFF_PREFIX PRI_LL_PREFIX
+#endif
+
+#ifndef PRIdPTRDIFF
+# define PRIdPTRDIFF PRI_PTRDIFF_PREFIX"d"
+# define PRIiPTRDIFF PRI_PTRDIFF_PREFIX"i"
+# define PRIoPTRDIFF PRI_PTRDIFF_PREFIX"o"
+# define PRIuPTRDIFF PRI_PTRDIFF_PREFIX"u"
+# define PRIxPTRDIFF PRI_PTRDIFF_PREFIX"x"
+# define PRIXPTRDIFF PRI_PTRDIFF_PREFIX"X"
+#endif
+
+#ifdef PRI_SIZE_PREFIX
+# /* Take that. */
+#elif SIZEOF_SIZE_T == SIZEOF_INT
+# define PRI_SIZE_PREFIX ""
+#elif SIZEOF_SIZE_T == SIZEOF_LONG
+# define PRI_SIZE_PREFIX "l"
+#elif SIZEOF_SIZE_T == SIZEOF_LONG_LONG
+# define PRI_SIZE_PREFIX PRI_LL_PREFIX
+#endif
+
+#ifndef PRIdSIZE
+# define PRIdSIZE PRI_SIZE_PREFIX"d"
+# define PRIiSIZE PRI_SIZE_PREFIX"i"
+# define PRIoSIZE PRI_SIZE_PREFIX"o"
+# define PRIuSIZE PRI_SIZE_PREFIX"u"
+# define PRIxSIZE PRI_SIZE_PREFIX"x"
+# define PRIXSIZE PRI_SIZE_PREFIX"X"
+#endif
+
+#endif /* RUBY_BACKWARD2_INTTYPES_H */

libs/libruby/ruby/backward/2/limits.h

@@ -0,0 +1,99 @@
+#ifndef RUBY_BACKWARD2_LIMITS_H                      /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_BACKWARD2_LIMITS_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Historical shim for `<limits.h>`.
+ *
+ * The macros in this header file are obsolescent.  Does anyone really need our
+ * own definition of `CHAR_BIT` today?
+ */
+#include "ruby/internal/config.h"
+
+#ifdef HAVE_LIMITS_H
+# include <limits.h>
+#endif
+
+#include "ruby/backward/2/long_long.h"
+
+#ifndef LONG_MAX
+# /* assuming 32bit(2's complement) long */
+# define LONG_MAX 2147483647L
+#endif
+
+#ifndef LONG_MIN
+# define LONG_MIN (-LONG_MAX-1)
+#endif
+
+#ifndef CHAR_BIT
+# define CHAR_BIT 8
+#endif
+
+#ifdef LLONG_MAX
+# /* Take that. */
+#elif defined(LONG_LONG_MAX)
+# define LLONG_MAX  LONG_LONG_MAX
+#elif defined(_I64_MAX)
+# define LLONG_MAX _I64_MAX
+#else
+# /* assuming 64bit(2's complement) long long */
+# define LLONG_MAX 9223372036854775807LL
+#endif
+
+#ifdef LLONG_MIN
+# /* Take that. */
+#elif defined(LONG_LONG_MIN)
+# define LLONG_MIN  LONG_LONG_MIN
+#elif defined(_I64_MAX)
+# define LLONG_MIN _I64_MIN
+#else
+# define LLONG_MIN (-LLONG_MAX-1)
+#endif
+
+#ifdef SIZE_MAX
+# /* Take that. */
+#elif SIZEOF_SIZE_T == SIZEOF_LONG_LONG
+# define SIZE_MAX ULLONG_MAX
+# define SIZE_MIN ULLONG_MIN
+#elif SIZEOF_SIZE_T == SIZEOF_LONG
+# define SIZE_MAX ULONG_MAX
+# define SIZE_MIN ULONG_MIN
+#elif SIZEOF_SIZE_T == SIZEOF_INT
+# define SIZE_MAX UINT_MAX
+# define SIZE_MIN UINT_MIN
+#else
+# define SIZE_MAX USHRT_MAX
+# define SIZE_MIN USHRT_MIN
+#endif
+
+#ifdef SSIZE_MAX
+# /* Take that. */
+#elif SIZEOF_SIZE_T == SIZEOF_LONG_LONG
+# define SSIZE_MAX LLONG_MAX
+# define SSIZE_MIN LLONG_MIN
+#elif SIZEOF_SIZE_T == SIZEOF_LONG
+# define SSIZE_MAX LONG_MAX
+# define SSIZE_MIN LONG_MIN
+#elif SIZEOF_SIZE_T == SIZEOF_INT
+# define SSIZE_MAX INT_MAX
+# define SSIZE_MIN INT_MIN
+#else
+# define SSIZE_MAX SHRT_MAX
+# define SSIZE_MIN SHRT_MIN
+#endif
+
+#endif /* RUBY_BACKWARD2_LIMITS_H */

libs/libruby/ruby/backward/2/long_long.h

@@ -0,0 +1,73 @@
+#ifndef RUBY_BACKWARD2_LONG_LONG_H                   /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_BACKWARD2_LONG_LONG_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines old #LONG_LONG
+ *
+ * No  known  compiler   that  can  compile  today's  ruby   lacks  long  long.
+ * Historically MSVC was  one of such compiler, but it  implemented long long a
+ * while  ago  (some  time  back  in  2013).   The  macros  are  for  backwards
+ * compatibility only.
+ */
+#include "ruby/internal/config.h"
+#include "ruby/internal/has/warning.h"
+#include "ruby/internal/warning_push.h"
+
+#if defined(__DOXYGEN__)
+# /** @cond INTERNAL_MACRO */
+# define HAVE_LONG_LONG 1
+# define HAVE_TRUE_LONG_LONG 1
+# /** @endcond */
+# /** @deprecated  Just use `long long` directly. */
+# define LONG_LONG long long.
+
+#elif RBIMPL_HAS_WARNING("-Wc++11-long-long")
+# define HAVE_TRUE_LONG_LONG 1
+# define LONG_LONG                           \
+    RBIMPL_WARNING_PUSH()                     \
+    RBIMPL_WARNING_IGNORED(-Wc++11-long-long) \
+    long long                                \
+    RBIMPL_WARNING_POP()
+
+#elif RBIMPL_HAS_WARNING("-Wlong-long")
+# define HAVE_TRUE_LONG_LONG 1
+# define LONG_LONG                     \
+    RBIMPL_WARNING_PUSH()               \
+    RBIMPL_WARNING_IGNORED(-Wlong-long) \
+    long long                          \
+    RBIMPL_WARNING_POP()
+
+#elif defined(HAVE_LONG_LONG)
+# define HAVE_TRUE_LONG_LONG 1
+# define LONG_LONG long long
+
+#elif SIZEOF___INT64 > 0
+# define HAVE_LONG_LONG 1
+# define LONG_LONG __int64
+# undef SIZEOF_LONG_LONG
+# define SIZEOF_LONG_LONG SIZEOF___INT64
+
+#else
+# error Hello!  Ruby developers believe this message must not happen.
+# error If you encounter this message, can you file a bug report?
+# error Remember to attach a detailed description of your environment.
+# error Thank you!
+#endif
+
+#endif /* RBIMPL_BACKWARD2_LONG_LONG_H */

libs/libruby/ruby/backward/2/r_cast.h

@@ -0,0 +1,32 @@
+#ifndef RUBY_BACKWARD2_R_CAST_H                      /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_BACKWARD2_R_CAST_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines old R_CAST
+ *
+ * Nobody is actively using this macro.
+ */
+#define R_CAST(st)   (struct st*)
+#define RMOVED(obj)  (R_CAST(RMoved)(obj))
+
+#if defined(__GNUC__)
+# warning R_CAST and RMOVED are deprecated
+#elif defined(_MSC_VER)
+# pragma message("warning: R_CAST and RMOVED are deprecated")
+#endif
+#endif /* RUBY_BACKWARD2_R_CAST_H */

libs/libruby/ruby/backward/2/rmodule.h

@@ -0,0 +1,36 @@
+#ifndef RUBY_BACKWARD2_RMODULE_H                     /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_BACKWARD2_RMODULE_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Orphan macros.
+ *
+ * These macros  seems broken since at  least 2011. Nobody (except  ruby itself
+ * who is implementing the internals) could have used those macros for a while.
+ * Kept public as-is here to keep some theoretical backwards compatibility.
+ */
+#define RMODULE_IV_TBL(m) RCLASS_IV_TBL(m)
+#define RMODULE_CONST_TBL(m) RCLASS_CONST_TBL(m)
+#define RMODULE_M_TBL(m) RCLASS_M_TBL(m)
+#define RMODULE_SUPER(m) RCLASS_SUPER(m)
+
+#if defined(__GNUC__)
+# warning RMODULE_* macros are deprecated
+#elif defined(_MSC_VER)
+# pragma message("warning: RMODULE_* macros are deprecated")
+#endif
+#endif /* RUBY_BACKWARD2_RMODULE_H */

libs/libruby/ruby/backward/2/stdalign.h

@@ -0,0 +1,30 @@
+#ifndef RUBY_BACKWARD2_STDALIGN_H                    /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_BACKWARD2_STDALIGN_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RUBY_ALIGNAS / #RUBY_ALIGNOF
+ */
+#include "ruby/internal/stdalign.h"
+
+#undef RUBY_ALIGNAS
+#undef RUBY_ALIGNOF
+#define RUBY_ALIGNAS RBIMPL_ALIGNAS /**< @copydoc RBIMPL_ALIGNAS */
+#define RUBY_ALIGNOF RBIMPL_ALIGNOF /**< @copydoc RBIMPL_ALIGNOF */
+
+#endif /* RUBY_BACKWARD2_STDALIGN_H */

libs/libruby/ruby/backward/2/stdarg.h

@@ -0,0 +1,69 @@
+#ifndef RUBY_BACKWARD2_STDARG_H                      /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_BACKWARD2_STDARG_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines old #_
+ *
+ * Nobody should  ever use these  macros any  longer.  No known  compilers lack
+ * prototypes today.  It's 21st century.  Just forget them.
+ */
+
+#undef _
+/**
+ * @deprecated  Nobody practically needs this macro any longer.
+ * @brief       This was a transition path from K&R to ANSI.
+ */
+#ifdef HAVE_PROTOTYPES
+# define _(args) args
+#else
+# define _(args) ()
+#endif
+
+#undef __
+/**
+ * @deprecated  Nobody practically needs this macro any longer.
+ * @brief       This was a transition path from K&R to ANSI.
+ */
+#ifdef HAVE_STDARG_PROTOTYPES
+# define __(args) args
+#else
+# define __(args) ()
+#endif
+
+/**
+ * Functions  declared using  this  macro take  arbitrary arguments,  including
+ * void.
+ *
+ * ```CXX
+ * void func(ANYARGS);
+ * ```
+ *
+ * This  was a  necessary  evil when  there  was no  such  thing like  function
+ * overloading.  But it  is the 21st century today.  People  generally need not
+ * use this.  Just use a granular typed function.
+ *
+ * @see ruby::backward::cxxanyargs
+ */
+#ifdef __cplusplus
+#define ANYARGS ...
+#else
+#define ANYARGS
+#endif
+
+#endif /* RUBY_BACKWARD2_STDARG_H */

libs/libruby/ruby/backward/cxxanyargs.hpp

@@ -0,0 +1,700 @@
+#ifndef RUBY_BACKWARD_CXXANYARGS_HPP                       //-*-C++-*-vi:ft=cpp
+#define RUBY_BACKWARD_CXXANYARGS_HPP
+/// @file
+/// @author     @shyouhei
+/// @copyright  This  file  is  a  part   of  the  programming  language  Ruby.
+///             Permission  is hereby  granted, to  either redistribute  and/or
+///             modify this file, provided that the conditions mentioned in the
+///             file COPYING are met.  Consult the file for details.
+/// @note       DO NOT  MODERNISE THIS FILE!   As the  file name implies  it is
+///             meant to  be a backwards  compatibility shim.  Please  stick to
+///             C++ 98 and never use newer features, like `constexpr`.
+/// @brief      Provides old prototypes for C++ programs.
+#include "ruby/internal/config.h"
+#include "ruby/internal/intern/class.h"
+#include "ruby/internal/intern/cont.h"
+#include "ruby/internal/intern/hash.h"
+#include "ruby/internal/intern/proc.h"
+#include "ruby/internal/intern/thread.h"
+#include "ruby/internal/intern/variable.h"
+#include "ruby/internal/intern/vm.h"
+#include "ruby/internal/iterator.h"
+#include "ruby/internal/method.h"
+#include "ruby/internal/value.h"
+#include "ruby/internal/variable.h"
+#include "ruby/backward/2/stdarg.h"
+#include "ruby/st.h"
+
+extern "C++" {
+
+#ifdef HAVE_NULLPTR
+#include <cstddef>
+#endif
+
+/// @brief  The main namespace.
+/// @note   The name  "ruby" might  already be  taken, but that  must not  be a
+///         problem because namespaces are allowed to reopen.
+namespace ruby {
+
+/// Backwards compatibility layer.
+namespace backward {
+
+/// Provides ANYARGS  deprecation warnings.   In C, ANYARGS  means there  is no
+/// function prototype.  Literally  anything, even including nothing,  can be a
+/// valid ANYARGS.   So passing a  correctly prototyped function pointer  to an
+/// ANYARGS-ed  function  parameter is  valid,  at  the  same time  passing  an
+/// ANYARGS-ed function pointer to a  granular typed function parameter is also
+/// valid.  However on the other hand in C++, ANYARGS doesn't actually mean any
+/// number of arguments.   C++'s ANYARGS means _variadic_  number of arguments.
+/// This is incompatible with ordinal, correct function prototypes.
+///
+/// Luckily, function  prototypes being distinct  each other means they  can be
+/// overloaded.  We can provide a compatibility layer for older Ruby APIs which
+/// used to have ANYARGS.  This namespace includes such attempts.
+namespace cxxanyargs {
+
+typedef VALUE type(ANYARGS);      ///< ANYARGS-ed function type.
+typedef void void_type(ANYARGS);  ///< ANYARGS-ed function type, void variant.
+typedef int int_type(ANYARGS);    ///< ANYARGS-ed function type, int variant.
+typedef VALUE onearg_type(VALUE); ///< Single-argumented function type.
+
+/// @name Hooking global variables
+/// @{
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       Define a function-backended global variable.
+/// @param[in]   q  Name of the variable.
+/// @param[in]   w  Getter function.
+/// @param[in]   e  Setter function.
+/// @note        Both functions can be nullptr.
+/// @see         rb_define_hooked_variable()
+/// @deprecated  Use granular typed overload instead.
+inline void
+rb_define_virtual_variable(const char *q, type *w, void_type *e)
+{
+    rb_gvar_getter_t *r = reinterpret_cast<rb_gvar_getter_t*>(w);
+    rb_gvar_setter_t *t = reinterpret_cast<rb_gvar_setter_t*>(e);
+    ::rb_define_virtual_variable(q, r, t);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+inline void
+rb_define_virtual_variable(const char *q, rb_gvar_getter_t *w, void_type *e)
+{
+    rb_gvar_setter_t *t = reinterpret_cast<rb_gvar_setter_t*>(e);
+    ::rb_define_virtual_variable(q, w, t);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+inline void
+rb_define_virtual_variable(const char *q, type *w, rb_gvar_setter_t *e)
+{
+    rb_gvar_getter_t *r = reinterpret_cast<rb_gvar_getter_t*>(w);
+    ::rb_define_virtual_variable(q, r, e);
+}
+
+#ifdef HAVE_NULLPTR
+inline void
+rb_define_virtual_variable(const char *q, rb_gvar_getter_t *w, std::nullptr_t e)
+{
+    ::rb_define_virtual_variable(q, w, e);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+inline void
+rb_define_virtual_variable(const char *q, type *w, std::nullptr_t e)
+{
+    rb_gvar_getter_t *r = reinterpret_cast<rb_gvar_getter_t *>(w);
+    ::rb_define_virtual_variable(q, r, e);
+}
+
+inline void
+rb_define_virtual_variable(const char *q, std::nullptr_t w, rb_gvar_setter_t *e)
+{
+    ::rb_define_virtual_variable(q, w, e);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+inline void
+rb_define_virtual_variable(const char *q, std::nullptr_t w, void_type *e)
+{
+    rb_gvar_setter_t *r = reinterpret_cast<rb_gvar_setter_t *>(e);
+    ::rb_define_virtual_variable(q, w, r);
+}
+#endif
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       Define a function-backended global variable.
+/// @param[in]   q  Name of the variable.
+/// @param[in]   w  Variable storage.
+/// @param[in]   e  Getter function.
+/// @param[in]   r  Setter function.
+/// @note        Both functions can be nullptr.
+/// @see         rb_define_virtual_variable()
+/// @deprecated  Use granular typed overload instead.
+inline void
+rb_define_hooked_variable(const char *q, VALUE *w, type *e, void_type *r)
+{
+    rb_gvar_getter_t *t = reinterpret_cast<rb_gvar_getter_t*>(e);
+    rb_gvar_setter_t *y = reinterpret_cast<rb_gvar_setter_t*>(r);
+    ::rb_define_hooked_variable(q, w, t, y);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+inline void
+rb_define_hooked_variable(const char *q, VALUE *w, rb_gvar_getter_t *e, void_type *r)
+{
+    rb_gvar_setter_t *y = reinterpret_cast<rb_gvar_setter_t*>(r);
+    ::rb_define_hooked_variable(q, w, e, y);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+inline void
+rb_define_hooked_variable(const char *q, VALUE *w, type *e, rb_gvar_setter_t *r)
+{
+    rb_gvar_getter_t *t = reinterpret_cast<rb_gvar_getter_t*>(e);
+    ::rb_define_hooked_variable(q, w, t, r);
+}
+
+#ifdef HAVE_NULLPTR
+inline void
+rb_define_hooked_variable(const char *q, VALUE *w, rb_gvar_getter_t *e, std::nullptr_t r)
+{
+    ::rb_define_hooked_variable(q, w, e, r);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+inline void
+rb_define_hooked_variable(const char *q, VALUE *w, type *e, std::nullptr_t r)
+{
+    rb_gvar_getter_t *y = reinterpret_cast<rb_gvar_getter_t *>(e);
+    ::rb_define_hooked_variable(q, w, y, r);
+}
+
+inline void
+rb_define_hooked_variable(const char *q, VALUE *w, std::nullptr_t e, rb_gvar_setter_t *r)
+{
+    ::rb_define_hooked_variable(q, w, e, r);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+inline void
+rb_define_hooked_variable(const char *q, VALUE *w, std::nullptr_t e, void_type *r)
+{
+    rb_gvar_setter_t *y = reinterpret_cast<rb_gvar_setter_t *>(r);
+    ::rb_define_hooked_variable(q, w, e, y);
+}
+#endif
+
+/// @}
+/// @name Exceptions and tag jumps
+/// @{
+
+// RUBY_CXX_DEPRECATED("by rb_block_call since 1.9")
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       Old way to implement iterators.
+/// @param[in]   q  A function that can yield.
+/// @param[in]   w  Passed to `q`.
+/// @param[in]   e  What is to be yielded.
+/// @param[in]   r  Passed to `e`.
+/// @return      The return value of `q`.
+/// @note        `e` can be nullptr.
+/// @deprecated  This function is obsoleted since  long before 2.x era.  Do not
+///              use it any longer.  rb_block_call() is provided instead.
+inline VALUE
+rb_iterate(onearg_type *q, VALUE w, type *e, VALUE r)
+{
+    rb_block_call_func_t t = reinterpret_cast<rb_block_call_func_t>(e);
+    return backward::rb_iterate_deprecated(q, w, t, r);
+}
+
+#ifdef HAVE_NULLPTR
+RUBY_CXX_DEPRECATED("by rb_block_call since 1.9")
+inline VALUE
+rb_iterate(onearg_type *q, VALUE w, std::nullptr_t e, VALUE r)
+{
+    return backward::rb_iterate_deprecated(q, w, e, r);
+}
+#endif
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       Call a method with a block.
+/// @param[in]   q  The self.
+/// @param[in]   w  The method.
+/// @param[in]   e  The # of elems of `r`
+/// @param[in]   r  The arguments.
+/// @param[in]   t  What is to be yielded.
+/// @param[in]   y  Passed to `t`
+/// @return      Return value of `q#w(*r,&t)`
+/// @note        't' can be nullptr.
+/// @deprecated  Use granular typed overload instead.
+inline VALUE
+rb_block_call(VALUE q, ID w, int e, const VALUE *r, type *t, VALUE y)
+{
+    rb_block_call_func_t u = reinterpret_cast<rb_block_call_func_t>(t);
+    return ::rb_block_call(q, w, e, r, u, y);
+}
+
+#ifdef HAVE_NULLPTR
+inline VALUE
+rb_block_call(VALUE q, ID w, int e, const VALUE *r, std::nullptr_t t, VALUE y)
+{
+    return ::rb_block_call(q, w, e, r, t, y);
+}
+#endif
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       An equivalent of `rescue` clause.
+/// @param[in]   q  A function that can raise.
+/// @param[in]   w  Passed to `q`.
+/// @param[in]   e  A function that cleans-up.
+/// @param[in]   r  Passed to `e`.
+/// @return      The return value of `q` if  no exception occurs, or the return
+///              value of `e` if otherwise.
+/// @note        `e` can be nullptr.
+/// @see         rb_ensure()
+/// @see         rb_rescue2()
+/// @see         rb_protect()
+/// @deprecated  Use granular typed overload instead.
+inline VALUE
+rb_rescue(type *q, VALUE w, type *e, VALUE r)
+{
+    typedef VALUE func1_t(VALUE);
+    typedef VALUE func2_t(VALUE, VALUE);
+    func1_t *t = reinterpret_cast<func1_t*>(q);
+    func2_t *y = reinterpret_cast<func2_t*>(e);
+    return ::rb_rescue(t, w, y, r);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       An equivalent of `rescue` clause.
+/// @param[in]   q    A function that can raise.
+/// @param[in]   w    Passed to `q`.
+/// @param[in]   e    A function that cleans-up.
+/// @param[in]   r    Passed to `e`.
+/// @param[in]   ...  0-terminated list of subclass of @ref rb_eException.
+/// @return      The return value of `q` if  no exception occurs, or the return
+///              value of `e` if otherwise.
+/// @note        `e` can be nullptr.
+/// @see         rb_ensure()
+/// @see         rb_rescue()
+/// @see         rb_protect()
+/// @deprecated  Use granular typed overload instead.
+inline VALUE
+rb_rescue2(type *q, VALUE w, type *e, VALUE r, ...)
+{
+    typedef VALUE func1_t(VALUE);
+    typedef VALUE func2_t(VALUE, VALUE);
+    func1_t *t = reinterpret_cast<func1_t*>(q);
+    func2_t *y = reinterpret_cast<func2_t*>(e);
+    va_list ap;
+    va_start(ap, r);
+    VALUE ret = ::rb_vrescue2(t, w, y, r, ap);
+    va_end(ap);
+    return ret;
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       An equivalent of `ensure` clause.
+/// @param[in]   q  A function that can raise.
+/// @param[in]   w  Passed to `q`.
+/// @param[in]   e  A function that ensures.
+/// @param[in]   r  Passed to `e`.
+/// @return      The return value of `q`.
+/// @note        It makes no sense to pass nullptr to `e`.
+/// @see         rb_rescue()
+/// @see         rb_rescue2()
+/// @see         rb_protect()
+/// @deprecated  Use granular typed overload instead.
+inline VALUE
+rb_ensure(type *q, VALUE w, type *e, VALUE r)
+{
+    typedef VALUE func1_t(VALUE);
+    func1_t *t = reinterpret_cast<func1_t*>(q);
+    func1_t *y = reinterpret_cast<func1_t*>(e);
+    return ::rb_ensure(t, w, y, r);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       An equivalent of `Kernel#catch`.
+/// @param[in]   q  The "tag" string.
+/// @param[in]   w  A function that can throw.
+/// @param[in]   e  Passed to `w`.
+/// @return      What was thrown.
+/// @note        `q` can be a nullptr but makes no sense to pass nullptr to`w`.
+/// @see         rb_block_call()
+/// @see         rb_protect()
+/// @see         rb_rb_catch_obj()
+/// @see         rb_rescue()
+/// @deprecated  Use granular typed overload instead.
+inline VALUE
+rb_catch(const char *q, type *w, VALUE e)
+{
+    rb_block_call_func_t r = reinterpret_cast<rb_block_call_func_t>(w);
+    return ::rb_catch(q, r, e);
+}
+
+#ifdef HAVE_NULLPTR
+inline VALUE
+rb_catch(const char *q, std::nullptr_t w, VALUE e)
+{
+    return ::rb_catch(q, w, e);
+}
+#endif
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       An equivalent of `Kernel#catch`.
+/// @param[in]   q  The "tag" object.
+/// @param[in]   w  A function that can throw.
+/// @param[in]   e  Passed to `w`.
+/// @return      What was thrown.
+/// @note        It makes no sense to pass nullptr to`w`.
+/// @see         rb_block_call()
+/// @see         rb_protect()
+/// @see         rb_rb_catch_obj()
+/// @see         rb_rescue()
+/// @deprecated  Use granular typed overload instead.
+inline VALUE
+rb_catch_obj(VALUE q, type *w, VALUE e)
+{
+    rb_block_call_func_t r = reinterpret_cast<rb_block_call_func_t>(w);
+    return ::rb_catch_obj(q, r, e);
+}
+
+/// @}
+/// @name Procs, Fibers and Threads
+/// @{
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       Creates a rb_cFiber instance.
+/// @param[in]   q  The fiber body.
+/// @param[in]   w  Passed to `q`.
+/// @return      What was allocated.
+/// @note        It makes no sense to pass nullptr to`q`.
+/// @see         rb_proc_new()
+/// @see         rb_thread_create()
+/// @deprecated  Use granular typed overload instead.
+inline VALUE
+rb_fiber_new(type *q, VALUE w)
+{
+    rb_block_call_func_t e = reinterpret_cast<rb_block_call_func_t>(q);
+    return ::rb_fiber_new(e, w);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       Creates a @ref rb_cProc instance.
+/// @param[in]   q  The proc body.
+/// @param[in]   w  Passed to `q`.
+/// @return      What was allocated.
+/// @note        It makes no sense to pass nullptr to`q`.
+/// @see         rb_fiber_new()
+/// @see         rb_thread_create()
+/// @deprecated  Use granular typed overload instead.
+inline VALUE
+rb_proc_new(type *q, VALUE w)
+{
+    rb_block_call_func_t e = reinterpret_cast<rb_block_call_func_t>(q);
+    return ::rb_proc_new(e, w);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       Creates a @ref rb_cThread instance.
+/// @param[in]   q  The thread body.
+/// @param[in]   w  Passed to `q`.
+/// @return      What was allocated.
+/// @note        It makes no sense to pass nullptr to`q`.
+/// @see         rb_proc_new()
+/// @see         rb_fiber_new()
+/// @deprecated  Use granular typed overload instead.
+inline VALUE
+rb_thread_create(type *q, void *w)
+{
+    typedef VALUE ptr_t(void*);
+    ptr_t *e = reinterpret_cast<ptr_t*>(q);
+    return ::rb_thread_create(e, w);
+}
+
+/// @}
+/// @name Hash and st_table
+/// @{
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       Iteration over the given table.
+/// @param[in]   q  A table to scan.
+/// @param[in]   w  A function to iterate.
+/// @param[in]   e  Passed to `w`.
+/// @retval      0  Always returns 0.
+/// @note        It makes no sense to pass nullptr to`w`.
+/// @see         st_foreach_check()
+/// @see         rb_hash_foreach()
+/// @deprecated  Use granular typed overload instead.
+inline int
+st_foreach(st_table *q, int_type *w, st_data_t e)
+{
+    st_foreach_callback_func *r =
+        reinterpret_cast<st_foreach_callback_func*>(w);
+    return ::st_foreach(q, r, e);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       Iteration over the given table.
+/// @param[in]   q  A table to scan.
+/// @param[in]   w  A function to iterate.
+/// @param[in]   e  Passed to `w`.
+/// @retval      0  Successful end of iteration.
+/// @retval      1  Element removed during traversing.
+/// @note        It makes no sense to pass nullptr to`w`.
+/// @see         st_foreach()
+/// @deprecated  Use granular typed overload instead.
+inline int
+st_foreach_check(st_table *q, int_type *w, st_data_t e, st_data_t)
+{
+    st_foreach_check_callback_func *t =
+        reinterpret_cast<st_foreach_check_callback_func*>(w);
+    return ::st_foreach_check(q, t, e, 0);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       Iteration over the given table.
+/// @param[in]   q  A table to scan.
+/// @param[in]   w  A function to iterate.
+/// @param[in]   e  Passed to `w`.
+/// @note        It makes no sense to pass nullptr to`w`.
+/// @see         st_foreach_check()
+/// @deprecated  Use granular typed overload instead.
+inline void
+st_foreach_safe(st_table *q, int_type *w, st_data_t e)
+{
+    st_foreach_callback_func *r =
+        reinterpret_cast<st_foreach_callback_func*>(w);
+    ::st_foreach_safe(q, r, e);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       Iteration over the given hash.
+/// @param[in]   q  A hash to scan.
+/// @param[in]   w  A function to iterate.
+/// @param[in]   e  Passed to `w`.
+/// @note        It makes no sense to pass nullptr to`w`.
+/// @see         st_foreach()
+/// @deprecated  Use granular typed overload instead.
+inline void
+rb_hash_foreach(VALUE q, int_type *w, VALUE e)
+{
+    st_foreach_callback_func *r =
+        reinterpret_cast<st_foreach_callback_func*>(w);
+    ::rb_hash_foreach(q, r, e);
+}
+
+RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
+/// @brief       Iteration over each instance variable of the object.
+/// @param[in]   q  An object.
+/// @param[in]   w  A function to iterate.
+/// @param[in]   e  Passed to `w`.
+/// @note        It makes no sense to pass nullptr to`w`.
+/// @see         st_foreach()
+/// @deprecated  Use granular typed overload instead.
+inline void
+rb_ivar_foreach(VALUE q, int_type *w, VALUE e)
+{
+    st_foreach_callback_func *r =
+        reinterpret_cast<st_foreach_callback_func*>(w);
+    ::rb_ivar_foreach(q, r, e);
+}
+
+/// @}
+
+/// Driver for *_define_method.  ::rb_define_method function for instance takes
+/// a  pointer to  ANYARGS-ed  functions,  which in  fact  varies 18  different
+/// prototypes.  We  still need to  preserve ANYARGS  for storages but  why not
+/// check  the consistencies  if  possible.   In C++  a  function  has its  own
+/// prototype, which  is a compile-time  constant (static type) by  nature.  We
+/// can list  up all the  possible input types  and provide warnings  for other
+/// cases.  This is such attempt.
+namespace define_method {
+
+/// Type of ::rb_f_notimplement().
+typedef VALUE notimpl_type(int, const VALUE *, VALUE, VALUE);
+
+/// @brief   Template metaprogramming to generate function prototypes.
+/// @tparam  T  Type of method id (`ID` or `const char*` in practice).
+/// @tparam  F  Definition driver e.g. ::rb_define_method.
+template<typename T, void (*F)(VALUE klass, T mid, type *func, int arity)>
+struct driver {
+
+    /// @brief      Defines a method
+    /// @tparam     N  Arity of the function.
+    /// @tparam     U  The function in question
+    template<int N, typename U>
+    struct engine {
+
+        /* :TODO: Following deprecation attribute renders tons of warnings (one
+         * per  every  method  definitions),  which  is  annoying.   Of  course
+         * annoyance is the  core feature of deprecation  warnings...  But that
+         * could be  too much,  especially when the  warnings happen  inside of
+         * machine-generated programs.   And SWIG  is known  to do  such thing.
+         * The new  (granular) API was  introduced in  API version 2.7.   As of
+         * this writing the  version is 2.8.  Let's warn this  later, some time
+         * during 3.x.   Hopefully codes in  old (ANYARGS-ed) format  should be
+         * less than now. */
+#if (RUBY_API_VERSION_MAJOR * 100 + RUBY_API_VERSION_MINOR) >= 301
+        RUBY_CXX_DEPRECATED("use of ANYARGS is deprecated")
+#endif
+        /// @copydoc define(VALUE klass, T mid, U func)
+        /// @deprecated  Pass correctly typed function instead.
+        static inline void
+        define(VALUE klass, T mid, type func)
+        {
+            F(klass, mid, func, N);
+        }
+
+        /// @brief      Defines klass#mid as func, whose arity is N.
+        /// @param[in]  klass  Where the method lives.
+        /// @param[in]  mid    Name of the method to define.
+        /// @param[in]  func   Function that implements klass#mid.
+        static inline void
+        define(VALUE klass, T mid, U func)
+        {
+            F(klass, mid, reinterpret_cast<type *>(func), N);
+        }
+
+        /// @copydoc define(VALUE klass, T mid, U func)
+        static inline void
+        define(VALUE klass, T mid, notimpl_type func)
+        {
+            F(klass, mid, reinterpret_cast<type *>(func), N);
+        }
+    };
+
+    /// @cond INTERNAL_MACRO
+    template<int N, bool = false> struct specific : public engine<N, type *> {};
+    template<bool b> struct specific<15, b> : public engine<15, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific<14, b> : public engine<14, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific<13, b> : public engine<13, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific<12, b> : public engine<12, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific<11, b> : public engine<11, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific<10, b> : public engine<10, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 9, b> : public engine< 9, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 8, b> : public engine< 8, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 7, b> : public engine< 7, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 6, b> : public engine< 6, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 5, b> : public engine< 5, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 4, b> : public engine< 4, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 3, b> : public engine< 3, VALUE(*)(VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 2, b> : public engine< 2, VALUE(*)(VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 1, b> : public engine< 1, VALUE(*)(VALUE, VALUE)> {};
+    template<bool b> struct specific< 0, b> : public engine< 0, VALUE(*)(VALUE)> {};
+    template<bool b> struct specific<-1, b> : public engine<-1, VALUE(*)(int argc, VALUE *argv, VALUE self)> {
+        using engine<-1, VALUE(*)(int argc, VALUE *argv, VALUE self)>::define;
+        static inline void define(VALUE c, T m, VALUE(*f)(int argc, const VALUE *argv, VALUE self)) { F(c, m, reinterpret_cast<type *>(f), -1); }
+    };
+    template<bool b> struct specific<-2, b> : public engine<-2, VALUE(*)(VALUE, VALUE)> {};
+    /// @endcond
+};
+
+/* We could perhaps merge this struct into the one above using variadic
+ * template parameters if we could assume C++11, but sadly we cannot. */
+/// @copydoc ruby::backward::cxxanyargs::define_method::driver
+template<typename T, void (*F)(T mid, type func, int arity)>
+struct driver0 {
+
+    /// @brief      Defines a method
+    /// @tparam     N  Arity of the function.
+    /// @tparam     U  The function in question
+    template<int N, typename U>
+    struct engine {
+        RUBY_CXX_DEPRECATED("use of ANYARGS is deprecated")
+        /// @copydoc define(T mid, U func)
+        /// @deprecated  Pass correctly typed function instead.
+        static inline void
+        define(T mid, type func)
+        {
+            F(mid, func, N);
+        }
+
+        /// @brief      Defines Kernel#mid as func, whose arity is N.
+        /// @param[in]  mid    Name of the method to define.
+        /// @param[in]  func   Function that implements klass#mid.
+        static inline void
+        define(T mid, U func)
+        {
+            F(mid, reinterpret_cast<type *>(func), N);
+        }
+
+        /// @copydoc define(T mid, U func)
+        /// @deprecated  Pass correctly typed function instead.
+        static inline void
+        define(T mid, notimpl_type func)
+        {
+            F(mid, reinterpret_cast<type *>(func), N);
+        }
+    };
+
+    /// @cond INTERNAL_MACRO
+    template<int N, bool = false> struct specific : public engine<N, type *> {};
+    template<bool b> struct specific<15, b> : public engine<15, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific<14, b> : public engine<14, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific<13, b> : public engine<13, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific<12, b> : public engine<12, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific<11, b> : public engine<11, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific<10, b> : public engine<10, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 9, b> : public engine< 9, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 8, b> : public engine< 8, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 7, b> : public engine< 7, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 6, b> : public engine< 6, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 5, b> : public engine< 5, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 4, b> : public engine< 4, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 3, b> : public engine< 3, VALUE(*)(VALUE, VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 2, b> : public engine< 2, VALUE(*)(VALUE, VALUE, VALUE)> {};
+    template<bool b> struct specific< 1, b> : public engine< 1, VALUE(*)(VALUE, VALUE)> {};
+    template<bool b> struct specific< 0, b> : public engine< 0, VALUE(*)(VALUE)> {};
+    template<bool b> struct specific<-1, b> : public engine<-1, VALUE(*)(int argc, VALUE *argv, VALUE self)> {
+        using engine<-1, VALUE(*)(int argc, VALUE *argv, VALUE self)>::define;
+        static inline void define(T m, VALUE(*f)(int argc, const VALUE *argv, VALUE self)) { F(m, reinterpret_cast<type *>(f), -1); }
+    };
+    template<bool b> struct specific<-2, b> : public engine<-2, VALUE(*)(VALUE, VALUE)> {};
+    /// @endcond
+};
+
+struct rb_define_method           : public driver <const char *, ::rb_define_method> {};           ///< Dispatches appropriate driver for ::rb_define_method.
+struct rb_define_method_id        : public driver <ID,           ::rb_define_method_id> {};        ///< Dispatches appropriate driver for ::rb_define_method_id.
+struct rb_define_private_method   : public driver <const char *, ::rb_define_private_method> {};   ///< Dispatches appropriate driver for ::rb_define_private_method.
+struct rb_define_protected_method : public driver <const char *, ::rb_define_protected_method> {}; ///< Dispatches appropriate driver for ::rb_define_protected_method.
+struct rb_define_singleton_method : public driver <const char *, ::rb_define_singleton_method> {}; ///< Dispatches appropriate driver for ::rb_define_singleton_method.
+struct rb_define_module_function  : public driver <const char *, ::rb_define_module_function> {};  ///< Dispatches appropriate driver for ::rb_define_module_function.
+struct rb_define_global_function  : public driver0<const char *, ::rb_define_global_function> {};  ///< Dispatches appropriate driver for ::rb_define_global_function.
+
+/// @brief        Defines klass\#mid.
+/// @param        klass  Where the method lives.
+/// @copydetails  #rb_define_global_function(mid, func, arity)
+#define rb_define_method(klass, mid, func, arity)           ::ruby::backward::cxxanyargs::define_method::rb_define_method::specific<arity>::define(klass, mid, func)
+
+/// @copydoc #rb_define_method(klass, mid, func, arity)
+#define rb_define_method_id(klass, mid, func, arity)        ::ruby::backward::cxxanyargs::define_method::rb_define_method_id::specific<arity>::define(klass, mid, func)
+
+/// @brief        Defines klass\#mid and makes it private.
+/// @copydetails  #rb_define_method(klass, mid, func, arity)
+#define rb_define_private_method(klass, mid, func, arity)   ::ruby::backward::cxxanyargs::define_method::rb_define_private_method::specific<arity>::define(klass, mid, func)
+
+/// @brief        Defines klass\#mid and makes it protected.
+/// @copydetails  #rb_define_method
+#define rb_define_protected_method(klass, mid, func, arity) ::ruby::backward::cxxanyargs::define_method::rb_define_protected_method::specific<arity>::define(klass, mid, func)
+
+/// @brief        Defines klass.mid.(klass, mid, func, arity)
+/// @copydetails  #rb_define_method
+#define rb_define_singleton_method(klass, mid, func, arity) ::ruby::backward::cxxanyargs::define_method::rb_define_singleton_method::specific<arity>::define(klass, mid, func)
+
+/// @brief        Defines klass\#mid and makes it a module function.
+/// @copydetails  #rb_define_method(klass, mid, func, arity)
+#define rb_define_module_function(klass, mid, func, arity)  ::ruby::backward::cxxanyargs::define_method::rb_define_module_function::specific<arity>::define(klass, mid, func)
+
+/// @brief Defines ::rb_mKernel \#mid.
+/// @param mid    Name of the defining method.
+/// @param func   Implementation of \#mid.
+/// @param arity  Arity of \#mid.
+#define rb_define_global_function(mid, func, arity)         ::ruby::backward::cxxanyargs::define_method::rb_define_global_function::specific<arity>::define(mid, func)
+
+}}}}}
+
+using namespace ruby::backward::cxxanyargs;
+#endif // RUBY_BACKWARD_CXXANYARGS_HPP

libs/libruby/ruby/config.h

@@ -0,0 +1,505 @@
+#ifndef INCLUDE_RUBY_CONFIG_H
+#define INCLUDE_RUBY_CONFIG_H 1
+/* confdefs.h */
+#define HAVE_STDIO_H 1
+#define HAVE_STDLIB_H 1
+#define HAVE_STRING_H 1
+#define HAVE_INTTYPES_H 1
+#define HAVE_STDINT_H 1
+#define HAVE_STRINGS_H 1
+#define HAVE_SYS_STAT_H 1
+#define HAVE_SYS_TYPES_H 1
+#define HAVE_UNISTD_H 1
+#define HAVE_WCHAR_H 1
+#define STDC_HEADERS 1
+#define _ALL_SOURCE 1
+#define _DARWIN_C_SOURCE 1
+#define _GNU_SOURCE 1
+#define _HPUX_ALT_XOPEN_SOCKET_API 1
+#define _NETBSD_SOURCE 1
+#define _OPENBSD_SOURCE 1
+#define _POSIX_PTHREAD_SEMANTICS 1
+#define __STDC_WANT_IEC_60559_ATTRIBS_EXT__ 1
+#define __STDC_WANT_IEC_60559_BFP_EXT__ 1
+#define __STDC_WANT_IEC_60559_DFP_EXT__ 1
+#define __STDC_WANT_IEC_60559_EXT__ 1
+#define __STDC_WANT_IEC_60559_FUNCS_EXT__ 1
+#define __STDC_WANT_IEC_60559_TYPES_EXT__ 1
+#define __STDC_WANT_LIB_EXT2__ 1
+#define __STDC_WANT_MATH_SPEC_FUNCS__ 1
+#define _TANDEM_SOURCE 1
+#define __EXTENSIONS__ 1
+#define RUBY_SYMBOL_EXPORT_BEGIN _Pragma("GCC visibility push(default)")
+#define RUBY_SYMBOL_EXPORT_END _Pragma("GCC visibility pop")
+#define HAVE_STMT_AND_DECL_IN_EXPR 1
+#define HAVE_PTHREAD_H 1
+#define _REENTRANT 1
+#define _THREAD_SAFE 1
+#define HAVE_LIBPTHREAD 1
+#define THREAD_IMPL_H "thread_pthread.h"
+#define THREAD_IMPL_SRC "thread_pthread.c"
+#define HAVE_LIBCRYPT 1
+#define HAVE_LIBDL 1
+#define HAVE_DIRENT_H 1
+#define HAVE__BOOL 1
+#define HAVE_STDBOOL_H 1
+#define HAVE_SYS_WAIT_H 1
+#define HAVE_GRP_H 1
+#define HAVE_FCNTL_H 1
+#define HAVE_FLOAT_H 1
+#define HAVE_LANGINFO_H 1
+#define HAVE_LIMITS_H 1
+#define HAVE_LOCALE_H 1
+#define HAVE_MALLOC_H 1
+#define HAVE_PWD_H 1
+#define HAVE_SANITIZER_ASAN_INTERFACE_H 1
+#define HAVE_STDALIGN_H 1
+#define HAVE_STDIO_H 1
+#define HAVE_SYS_EVENTFD_H 1
+#define HAVE_SYS_FCNTL_H 1
+#define HAVE_SYS_FILE_H 1
+#define HAVE_SYS_IOCTL_H 1
+#define HAVE_SYS_PARAM_H 1
+#define HAVE_SYS_PRCTL_H 1
+#define HAVE_SYS_RANDOM_H 1
+#define HAVE_SYS_RESOURCE_H 1
+#define HAVE_SYS_SELECT_H 1
+#define HAVE_SYS_SENDFILE_H 1
+#define HAVE_SYS_SOCKET_H 1
+#define HAVE_SYS_SYSCALL_H 1
+#define HAVE_SYS_SYSMACROS_H 1
+#define HAVE_SYS_TIME_H 1
+#define HAVE_SYS_TIMES_H 1
+#define HAVE_SYS_UIO_H 1
+#define HAVE_SYSCALL_H 1
+#define HAVE_TIME_H 1
+#define HAVE_UCONTEXT_H 1
+#define HAVE_UTIME_H 1
+#define HAVE_SYS_EPOLL_H 1
+#define HAVE_STDCKDINT_H 1
+#define HAVE_STDATOMIC_H 1
+#define HAVE_X86INTRIN_H 1
+#if defined(__x86_64__)
+#define HAVE_X86INTRIN_H 1
+#endif
+#define HAVE_GMP_H 1
+#define HAVE_LIBGMP 1
+#define HAVE_TYPEOF 1
+#define restrict __restrict__
+#define HAVE_LONG_LONG 1
+#define HAVE_OFF_T 1
+#define SIZEOF_INT 4
+#define SIZEOF_SHORT 2
+#define SIZEOF_LONG 8
+#define SIZEOF_LONG_LONG 8
+#define SIZEOF___INT64 0
+#define SIZEOF___INT128 16
+#define SIZEOF_OFF_T 8
+#define SIZEOF_VOIDP 8
+#define SIZEOF_FLOAT 4
+#define SIZEOF_DOUBLE 8
+#define SIZEOF_TIME_T 8
+#define SIZEOF_CLOCK_T 8
+#define RBIMPL_ATTR_PACKED_STRUCT_BEGIN()
+#define RBIMPL_ATTR_PACKED_STRUCT_END() __attribute__((packed))
+#define USE_UNALIGNED_MEMBER_ACCESS 1
+#define PRI_LL_PREFIX "ll"
+#define HAVE_PID_T 1
+#define rb_pid_t pid_t
+#define SIGNEDNESS_OF_PID_T -1
+#define PIDT2NUM(v) INT2NUM(v)
+#define NUM2PIDT(v) NUM2INT(v)
+#define PRI_PIDT_PREFIX PRI_INT_PREFIX
+#define HAVE_UID_T 1
+#define rb_uid_t uid_t
+#define SIGNEDNESS_OF_UID_T +1
+#define UIDT2NUM(v) UINT2NUM(v)
+#define NUM2UIDT(v) NUM2UINT(v)
+#define PRI_UIDT_PREFIX PRI_INT_PREFIX
+#define HAVE_GID_T 1
+#define rb_gid_t gid_t
+#define SIGNEDNESS_OF_GID_T +1
+#define GIDT2NUM(v) UINT2NUM(v)
+#define NUM2GIDT(v) NUM2UINT(v)
+#define PRI_GIDT_PREFIX PRI_INT_PREFIX
+#define HAVE_TIME_T 1
+#define rb_time_t time_t
+#define SIGNEDNESS_OF_TIME_T -1
+#define TIMET2NUM(v) LONG2NUM(v)
+#define NUM2TIMET(v) NUM2LONG(v)
+#define PRI_TIMET_PREFIX PRI_LONG_PREFIX
+#define HAVE_DEV_T 1
+#define rb_dev_t dev_t
+#define SIGNEDNESS_OF_DEV_T +1
+#define DEVT2NUM(v) ULONG2NUM(v)
+#define NUM2DEVT(v) NUM2ULONG(v)
+#define PRI_DEVT_PREFIX PRI_LONG_PREFIX
+#define HAVE_MODE_T 1
+#define rb_mode_t mode_t
+#define SIGNEDNESS_OF_MODE_T +1
+#define MODET2NUM(v) UINT2NUM(v)
+#define NUM2MODET(v) NUM2UINT(v)
+#define PRI_MODET_PREFIX PRI_INT_PREFIX
+#define HAVE_RLIM_T 1
+#define rb_rlim_t rlim_t
+#define SIGNEDNESS_OF_RLIM_T +1
+#define RLIM2NUM(v) ULONG2NUM(v)
+#define NUM2RLIM(v) NUM2ULONG(v)
+#define PRI_RLIM_PREFIX PRI_LONG_PREFIX
+#define HAVE_OFF_T 1
+#define rb_off_t off_t
+#define SIGNEDNESS_OF_OFF_T -1
+#define OFFT2NUM(v) LONG2NUM(v)
+#define NUM2OFFT(v) NUM2LONG(v)
+#define PRI_OFFT_PREFIX PRI_LONG_PREFIX
+#define HAVE_CLOCKID_T 1
+#define rb_clockid_t clockid_t
+#define SIGNEDNESS_OF_CLOCKID_T -1
+#define CLOCKID2NUM(v) INT2NUM(v)
+#define NUM2CLOCKID(v) NUM2INT(v)
+#define PRI_CLOCKID_PREFIX PRI_INT_PREFIX
+#define HAVE_VA_ARGS_MACRO 1
+#define HAVE__ALIGNOF 1
+#define CONSTFUNC(x) __attribute__((__const__)) x
+#define PUREFUNC(x) __attribute__((__pure__)) x
+#define NORETURN(x) __attribute__((__noreturn__)) x
+#define DEPRECATED(x) __attribute__((__deprecated__)) x
+#define DEPRECATED_BY(n, x) __attribute__((__deprecated__("by " #n))) x
+#define NOINLINE(x) __attribute__((__noinline__)) x
+#define ALWAYS_INLINE(x) __attribute__((__always_inline__)) x
+#define NO_SANITIZE(san, x) __attribute__((__no_sanitize__(san))) x
+#define NO_SANITIZE_ADDRESS(x) __attribute__((__no_sanitize_address__)) x
+#define NO_ADDRESS_SAFETY_ANALYSIS(x)                                          \
+  __attribute__((__no_address_safety_analysis__)) x
+#define WARN_UNUSED_RESULT(x) __attribute__((__warn_unused_result__)) x
+#define MAYBE_UNUSED(x) __attribute__((__unused__)) x
+#define ERRORFUNC(mesg, x) __attribute__((__error__ mesg)) x
+#define WARNINGFUNC(mesg, x) __attribute__((__warning__ mesg)) x
+#define WEAK(x) __attribute__((__weak__)) x
+#define HAVE_FUNC_WEAK 1
+#define RUBY_CXX_DEPRECATED(msg) __attribute__((__deprecated__(msg)))
+#define HAVE_NULLPTR 1
+#define FUNC_UNOPTIMIZED(x) __attribute__((__optimize__("O0"))) x
+#define FUNC_MINIMIZED(x)                                                      \
+  __attribute__((__optimize__("-Os", "-fomit-frame-pointer"))) x
+#define HAVE_ATTRIBUTE_FUNCTION_ALIAS 1
+#define RUBY_ALIAS_FUNCTION_TYPE(type, prot, name, args)                       \
+  type prot __attribute__((alias(#name)));
+#define RUBY_ALIAS_FUNCTION_VOID(prot, name, args)                             \
+  RUBY_ALIAS_FUNCTION_TYPE(void, prot, name, args)
+#define HAVE_GCC_ATOMIC_BUILTINS 1
+#define HAVE_GCC_SYNC_BUILTINS 1
+#define HAVE___BUILTIN_UNREACHABLE 1
+#define RUBY_FUNC_EXPORTED __attribute__((__visibility__("default"))) extern
+#define RUBY_FUNC_NONNULL(n, x) __attribute__((__nonnull__(n))) x
+#define RUBY_FUNCTION_NAME_STRING __func__
+#define ENUM_OVER_INT 1
+#define HAVE_DECL_SYS_NERR 0
+#define HAVE_DECL_GETENV 1
+#define SIZEOF_SIZE_T 8
+#define SIZEOF_PTRDIFF_T 8
+#define SIZEOF_DEV_T 8
+#define PRI_SIZE_PREFIX "z"
+#define PRI_PTRDIFF_PREFIX "t"
+#define HAVE_STRUCT_STAT_ST_BLKSIZE 1
+#define HAVE_STRUCT_STAT_ST_BLOCKS 1
+#define HAVE_STRUCT_STAT_ST_RDEV 1
+#define SIZEOF_STRUCT_STAT_ST_SIZE SIZEOF_OFF_T
+#define SIZEOF_STRUCT_STAT_ST_BLOCKS SIZEOF_OFF_T
+#define SIZEOF_STRUCT_STAT_ST_INO SIZEOF_LONG
+#define SIZEOF_STRUCT_STAT_ST_DEV SIZEOF_DEV_T
+#define SIZEOF_STRUCT_STAT_ST_RDEV SIZEOF_DEV_T
+#define HAVE_STRUCT_STAT_ST_ATIM 1
+#define HAVE_STRUCT_STAT_ST_MTIM 1
+#define HAVE_STRUCT_STAT_ST_CTIM 1
+#define HAVE_STRUCT_STATX_STX_BTIME 1
+#define HAVE_STRUCT_TIMEVAL 1
+#define SIZEOF_STRUCT_TIMEVAL_TV_SEC SIZEOF_TIME_T
+#define HAVE_STRUCT_TIMESPEC 1
+#define HAVE_STRUCT_TIMEZONE 1
+#define HAVE_RB_FD_INIT 1
+#define HAVE_INT8_T 1
+#define SIZEOF_INT8_T 1
+#define HAVE_UINT8_T 1
+#define SIZEOF_UINT8_T 1
+#define HAVE_INT16_T 1
+#define SIZEOF_INT16_T 2
+#define HAVE_UINT16_T 1
+#define SIZEOF_UINT16_T 2
+#define HAVE_INT32_T 1
+#define SIZEOF_INT32_T 4
+#define HAVE_UINT32_T 1
+#define SIZEOF_UINT32_T 4
+#define HAVE_INT64_T 1
+#define SIZEOF_INT64_T 8
+#define HAVE_UINT64_T 1
+#define SIZEOF_UINT64_T 8
+#define HAVE_INT128_T 1
+#define int128_t __int128
+#define SIZEOF_INT128_T SIZEOF___INT128
+#define HAVE_UINT128_T 1
+#define uint128_t unsigned __int128
+#define SIZEOF_UINT128_T SIZEOF___INT128
+#define HAVE_INTPTR_T 1
+#define SIZEOF_INTPTR_T 8
+#define HAVE_UINTPTR_T 1
+#define SIZEOF_UINTPTR_T 8
+#define HAVE_SSIZE_T 1
+#define SIZEOF_SSIZE_T 8
+#define STACK_END_ADDRESS __libc_stack_end
+#define GETGROUPS_T gid_t
+#define HAVE_ALLOCA_H 1
+#define HAVE_ALLOCA 1
+#define HAVE_DUP 1
+#define HAVE_DUP2 1
+#define HAVE_ACOSH 1
+#define HAVE_CBRT 1
+#define HAVE_CRYPT 1
+#define HAVE_ERF 1
+#define HAVE_EXPLICIT_BZERO 1
+#define HAVE_FFS 1
+#define HAVE_FLOCK 1
+#define HAVE_HYPOT 1
+#define HAVE_LGAMMA_R 1
+#define HAVE_MEMMOVE 1
+#define HAVE_NAN 1
+#define HAVE_NEXTAFTER 1
+#define HAVE_STRCHR 1
+#define HAVE_STRERROR 1
+#define HAVE_STRLCAT 1
+#define HAVE_STRLCPY 1
+#define HAVE_STRSTR 1
+#define HAVE_TGAMMA 1
+#define HAVE_ISFINITE 1
+#define SPT_TYPE SPT_REUSEARGV
+#define HAVE_SIGNBIT 1
+#define HAVE_FORK 1
+#define HAVE_VFORK 1
+#define HAVE_WORKING_VFORK 1
+#define HAVE_WORKING_FORK 1
+#define HAVE__LONGJMP 1
+#define HAVE_ARC4RANDOM_BUF 1
+#define HAVE_ATAN2L 1
+#define HAVE_ATAN2F 1
+#define HAVE_DECL_ATOMIC_SIGNAL_FENCE 1
+#define HAVE_CHMOD 1
+#define HAVE_CHOWN 1
+#define HAVE_CHROOT 1
+#define HAVE_CLOCK_GETTIME 1
+#define HAVE_COPY_FILE_RANGE 1
+#define HAVE_COSH 1
+#define HAVE_CRYPT_R 1
+#define HAVE_DIRFD 1
+#define HAVE_DL_ITERATE_PHDR 1
+#define HAVE_DLOPEN 1
+#define HAVE_DLADDR 1
+#define HAVE_DUP3 1
+#define HAVE_EACCESS 1
+#define HAVE_ENDGRENT 1
+#define HAVE_EVENTFD 1
+#define HAVE_EXECL 1
+#define HAVE_EXECLE 1
+#define HAVE_EXECV 1
+#define HAVE_EXECVE 1
+#define HAVE_FCHDIR 1
+#define HAVE_FCHMOD 1
+#define HAVE_FCHOWN 1
+#define HAVE_FCNTL 1
+#define HAVE_FDATASYNC 1
+#define HAVE_FDOPENDIR 1
+#define HAVE_FMOD 1
+#define HAVE_FSTATAT 1
+#define HAVE_FSYNC 1
+#define HAVE_FTRUNCATE 1
+#define HAVE_FTRUNCATE64 1
+#define HAVE_GETCWD 1
+#define HAVE_GETEGID 1
+#define HAVE_GETENTROPY 1
+#define HAVE_GETEUID 1
+#define HAVE_GETGID 1
+#define HAVE_GETGRNAM 1
+#define HAVE_GETGRNAM_R 1
+#define HAVE_GETGROUPS 1
+#define HAVE_GETLOGIN 1
+#define HAVE_GETLOGIN_R 1
+#define HAVE_GETPGID 1
+#define HAVE_GETPGRP 1
+#define HAVE_GETPPID 1
+#define HAVE_GETPRIORITY 1
+#define HAVE_GETPWNAM 1
+#define HAVE_GETPWNAM_R 1
+#define HAVE_GETPWUID 1
+#define HAVE_GETPWUID_R 1
+#define HAVE_GETRANDOM 1
+#define HAVE_GETRESGID 1
+#define HAVE_GETRESUID 1
+#define HAVE_GETRLIMIT 1
+#define HAVE_GETSID 1
+#define HAVE_GETTIMEOFDAY 1
+#define HAVE_GETUID 1
+#define HAVE_GMTIME_R 1
+#define HAVE_INITGROUPS 1
+#define HAVE_IOCTL 1
+#define HAVE_KILL 1
+#define HAVE_KILLPG 1
+#define HAVE_LCHMOD 1
+#define HAVE_LCHOWN 1
+#define HAVE_LINK 1
+#define HAVE_LLABS 1
+#define HAVE_LOCKF 1
+#define HAVE_LOG2 1
+#define HAVE_LSTAT 1
+#define HAVE_LUTIMES 1
+#define HAVE_MALLOC_USABLE_SIZE 1
+#define HAVE_MALLOC_TRIM 1
+#define HAVE_MBLEN 1
+#define HAVE_MEMALIGN 1
+#define HAVE_WRITEV 1
+#define HAVE_MEMRCHR 1
+#define HAVE_MEMMEM 1
+#define HAVE_MKFIFO 1
+#define HAVE_MKNOD 1
+#define HAVE_MKTIME 1
+#define HAVE_MMAP 1
+#define HAVE_MREMAP 1
+#define HAVE_OPENAT 1
+#define HAVE_PCLOSE 1
+#define HAVE_PIPE 1
+#define HAVE_PIPE2 1
+#define HAVE_POLL 1
+#define HAVE_POPEN 1
+#define HAVE_POSIX_FADVISE 1
+#define HAVE_POSIX_MADVISE 1
+#define HAVE_POSIX_MEMALIGN 1
+#define HAVE_PPOLL 1
+#define HAVE_PREAD 1
+#define HAVE_PWRITE 1
+#define HAVE_QSORT_R 1
+#define HAVE_READLINK 1
+#define HAVE_REALPATH 1
+#define HAVE_ROUND 1
+#define HAVE_SCHED_GETAFFINITY 1
+#define HAVE_SEEKDIR 1
+#define HAVE_SENDFILE 1
+#define HAVE_SETEGID 1
+#define HAVE_SETENV 1
+#define HAVE_SETEUID 1
+#define HAVE_SETGID 1
+#define HAVE_SETGROUPS 1
+#define HAVE_SETPGID 1
+#define HAVE_SETPGRP 1
+#define HAVE_SETREGID 1
+#define HAVE_SETRESGID 1
+#define HAVE_SETRESUID 1
+#define HAVE_SETREUID 1
+#define HAVE_SETRLIMIT 1
+#define HAVE_SETSID 1
+#define HAVE_SETUID 1
+#define HAVE_SHUTDOWN 1
+#define HAVE_SIGACTION 1
+#define HAVE_SIGALTSTACK 1
+#define HAVE_SIGPROCMASK 1
+#define HAVE_SINH 1
+#define HAVE_SNPRINTF 1
+#define HAVE_SYMLINK 1
+#define HAVE_SYSCALL 1
+#define HAVE_SYSCONF 1
+#define HAVE_SYSTEM 1
+#define HAVE_TANH 1
+#define HAVE_TELLDIR 1
+#define HAVE_TIMEGM 1
+#define HAVE_TIMES 1
+#define HAVE_TRUNCATE 1
+#define HAVE_TRUNCATE64 1
+#define HAVE_TZSET 1
+#define HAVE_UMASK 1
+#define HAVE_UNSETENV 1
+#define HAVE_UTIMENSAT 1
+#define HAVE_UTIMES 1
+#define HAVE_WAIT4 1
+#define HAVE_WAITPID 1
+#define HAVE_STATX 1
+#define HAVE_CRYPT_H 1
+#define HAVE_STRUCT_CRYPT_DATA_INITIALIZED 1
+#define HAVE_BUILTIN___BUILTIN_ALLOCA_WITH_ALIGN 1
+#define HAVE_BUILTIN___BUILTIN_ASSUME_ALIGNED 1
+#define HAVE_BUILTIN___BUILTIN_BSWAP16 1
+#define HAVE_BUILTIN___BUILTIN_BSWAP32 1
+#define HAVE_BUILTIN___BUILTIN_BSWAP64 1
+#define HAVE_BUILTIN___BUILTIN_POPCOUNT 1
+#define HAVE_BUILTIN___BUILTIN_POPCOUNTLL 1
+#define HAVE_BUILTIN___BUILTIN_CLZ 1
+#define HAVE_BUILTIN___BUILTIN_CLZL 1
+#define HAVE_BUILTIN___BUILTIN_CLZLL 1
+#define HAVE_BUILTIN___BUILTIN_CTZ 1
+#define HAVE_BUILTIN___BUILTIN_CTZLL 1
+#define HAVE_BUILTIN___BUILTIN_CONSTANT_P 1
+#define HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR 1
+#define HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P 1
+#define HAVE_BUILTIN___BUILTIN_TYPES_COMPATIBLE_P 1
+#define HAVE_BUILTIN___BUILTIN_TRAP 1
+#define HAVE_BUILTIN___BUILTIN_EXPECT 1
+#define HAVE_BUILTIN___BUILTIN_ADD_OVERFLOW 1
+#define HAVE_BUILTIN___BUILTIN_ADD_OVERFLOW_P 1
+#define USE___BUILTIN_ADD_OVERFLOW_LONG_LONG 1
+#define HAVE_BUILTIN___BUILTIN_SUB_OVERFLOW 1
+#define HAVE_BUILTIN___BUILTIN_SUB_OVERFLOW_P 1
+#define USE___BUILTIN_SUB_OVERFLOW_LONG_LONG 1
+#define HAVE_BUILTIN___BUILTIN_MUL_OVERFLOW 1
+#define HAVE_BUILTIN___BUILTIN_MUL_OVERFLOW_P 1
+#define USE___BUILTIN_MUL_OVERFLOW_LONG_LONG 1
+#define HAVE_GNU_QSORT_R 1
+#define ATAN2_INF_C99 1
+#define HAVE_CLOCK_GETRES 1
+#define HAVE_LIBRT 1
+#define HAVE_LIBRT 1
+#define HAVE_TIMER_CREATE 1
+#define HAVE_TIMER_SETTIME 1
+#define HAVE_STRUCT_TM_TM_ZONE 1
+#define HAVE_TM_ZONE 1
+#define HAVE_STRUCT_TM_TM_GMTOFF 1
+#define HAVE_DAYLIGHT 1
+#define NEGATIVE_TIME_T 1
+#define POSIX_SIGNAL 1
+#define HAVE_SIG_T 1
+#define RSHIFT(x, y) ((x) >> (int)(y))
+#define USE_COPY_FILE_RANGE 1
+#define HAVE__SC_CLK_TCK 1
+#define STACK_GROW_DIRECTION -1
+#define COROUTINE_H "coroutine/amd64/Context.h"
+#define HAVE_SCHED_YIELD 1
+#define HAVE_PTHREAD_ATTR_SETINHERITSCHED 1
+#define HAVE_PTHREAD_ATTR_GETSTACK 1
+#define HAVE_PTHREAD_ATTR_GETGUARDSIZE 1
+#define HAVE_PTHREAD_CONDATTR_SETCLOCK 1
+#define HAVE_PTHREAD_SETNAME_NP 1
+#define HAVE_PTHREAD_SIGMASK 1
+#define HAVE_PTHREAD_GETATTR_NP 1
+#define SET_CURRENT_THREAD_NAME(name) pthread_setname_np(pthread_self(), name)
+#define SET_ANOTHER_THREAD_NAME(thid, name) pthread_setname_np(thid, name)
+#define RB_THREAD_LOCAL_SPECIFIER _Thread_local
+#define DEFINE_MCONTEXT_PTR(mc, uc) mcontext_t *mc = &(uc)->uc_mcontext
+#define HAVE_GETCONTEXT 1
+#define HAVE_SETCONTEXT 1
+#define HAVE_SYS_USER_H 1
+#define HAVE_CONST_PAGE_SIZE 0
+#define IOCTL_REQ_TYPE unsigned long
+#define NUM2IOCTLREQ(num) NUM2ULONG(num)
+#define USE_ELF 1
+#define HAVE_ELF_H 1
+#define HAVE_LIBZ 1
+#define HAVE_BACKTRACE 1
+#define DLEXT_MAXLEN 3
+#define DLEXT ".so"
+#define SOEXT ".so"
+#define LIBDIR_BASENAME "lib"
+#define HAVE__SETJMP 1
+#define RUBY_SETJMP(env) _setjmp((env))
+#define RUBY_LONGJMP(env, val) _longjmp((env), val)
+#define RUBY_JMP_BUF jmp_buf
+#define USE_MODULAR_GC 0
+#define USE_YJIT 1
+#define USE_RJIT 1
+#define RUBY_PLATFORM "x86_64-linux"
+#define RB_DEFAULT_PARSER RB_DEFAULT_PARSER_PRISM
+#endif /* INCLUDE_RUBY_CONFIG_H */

libs/libruby/ruby/debug.h

@@ -0,0 +1,667 @@
+#ifndef RB_DEBUG_H                                   /*-*-C++-*-vi:se ft=cpp:*/
+#define RB_DEBUG_H 1
+/**
+ * @file
+ * @author     $Author: ko1 $
+ * @date       Tue Nov 20 20:35:08 2012
+ * @copyright  Copyright (C) 2012 Yukihiro Matsumoto
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ */
+#include "ruby/internal/attr/nonnull.h"
+#include "ruby/internal/attr/returns_nonnull.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/event.h"
+#include "ruby/internal/value.h"
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+
+/* Note: This file contains experimental APIs. */
+/* APIs can be replaced at Ruby 2.0.1 or later */
+
+/**
+ * @name Frame-profiling APIs
+ *
+ * @{
+ */
+
+RBIMPL_ATTR_NONNULL((3))
+/**
+ * Queries mysterious "frame"s of the given range.
+ *
+ * The returned values are opaque backtrace  pointers, which you are allowed to
+ * issue a very  limited set of operations listed below.   Don't call arbitrary
+ * ruby methods.
+ *
+ * @param[in]   start  Start position (0 means the topmost).
+ * @param[in]   limit  Number objects of `buff`.
+ * @param[out]  buff   Return buffer.
+ * @param[out]  lines  Return buffer.
+ * @return      Number of objects filled into `buff`.
+ * @post        `buff` is filled with backtrace pointers.
+ * @post        `lines` is filled with `__LINE__` of each backtraces.
+ *
+ * @internal
+ *
+ * @shyouhei  doesn't  like  this  abuse  of  ::VALUE.   It  should  have  been
+ * `const struct rb_callable_method_entry_struct *`.
+ */
+int rb_profile_frames(int start, int limit, VALUE *buff, int *lines);
+
+/**
+ * Queries the path of the passed backtrace.
+ *
+ * @param[in]  frame      What rb_profile_frames() returned.
+ * @retval     RUBY_Qnil  The frame is implemented in C etc.
+ * @retval     otherwise  Where `frame` is running.
+ */
+VALUE rb_profile_frame_path(VALUE frame);
+
+/**
+ * Identical  to  rb_profile_frame_path(),  except   it  tries  to  expand  the
+ * returning  path.   In case  the  path  is  `require`-d from  something  else
+ * rb_profile_frame_path() can return relative paths.   This one tries to avoid
+ * that.
+ *
+ * @param[in]  frame      What rb_profile_frames() returned.
+ * @retval     "<cfunc>"  The frame is in C.
+ * @retval     RUBY_Qnil  Can't infer real path (inside of `eval` etc.).
+ * @retval     otherwise  Where `frame` is running.
+ */
+VALUE rb_profile_frame_absolute_path(VALUE frame);
+
+/**
+ * Queries human-readable "label" string.  This is `"<main>"` for the toplevel,
+ * `"<compiled>"` for evaluated  ones, method name for methods,  class name for
+ * classes.
+ *
+ * @param[in]  frame         What rb_profile_frames() returned.
+ * @retval     RUBY_Qnil     Can't infer the label (C etc.).
+ * @retval     "<main>"      The frame is global toplevel.
+ * @retval     "<compiled>"  The frame is dynamic.
+ * @retval     otherwise     Label of the frame.
+ */
+VALUE rb_profile_frame_label(VALUE frame);
+
+/**
+ * Identical  to rb_profile_frame_label(),  except  it does  not "qualify"  the
+ * result.  Consider the following backtrace:
+ *
+ * ```ruby
+ * def bar
+ *   caller_locations
+ * end
+ *
+ * def foo
+ *   [1].map { bar }.first
+ * end
+ *
+ * obj = foo.first
+ * obj.label      # => "block in foo"
+ * obj.base_label # => "foo"
+ * ```
+ *
+ * @param[in]  frame         What rb_profile_frames() returned.
+ * @retval     RUBY_Qnil     Can't infer the label (C etc.).
+ * @retval     "<main>"      The frame is global toplevel.
+ * @retval     "<compiled>"  The frame is dynamic.
+ * @retval     otherwise     Base label of the frame.
+ */
+VALUE rb_profile_frame_base_label(VALUE frame);
+
+/**
+ * Identical to rb_profile_frame_label(), except it returns a qualified result.
+ *
+ * @param[in]  frame         What rb_profile_frames() returned.
+ * @retval     RUBY_Qnil     Can't infer the label (C etc.).
+ * @retval     "<main>"      The frame is global toplevel.
+ * @retval     "<compiled>"  The frame is dynamic.
+ * @retval     otherwise     Qualified label of the frame.
+ *
+ * @internal
+ *
+ * As  of writing  there is  no way  to obtain  this return  value from  a Ruby
+ * script.  This may change  in future (it took 8 years  and still no progress,
+ * though).
+ */
+VALUE rb_profile_frame_full_label(VALUE frame);
+
+/**
+ * Queries the first  line of the method  of the passed frame  pointer.  Can be
+ * handy when for instance a debugger want to display the frame in question.
+ *
+ * @param[in]  frame      What rb_profile_frames() returned.
+ * @retval     RUBY_Qnil  Can't infer the line (C etc.).
+ * @retval     otherwise  Line number of the method in question.
+ */
+VALUE rb_profile_frame_first_lineno(VALUE frame);
+
+/**
+ * Queries the class path of the method that the passed frame represents.
+ *
+ * @param[in]  frame      What rb_profile_frames() returned.
+ * @retval     RUBY_Qnil  Can't infer the class (global toplevel etc.).
+ * @retval     otherwise  Class path as in rb_class_path().
+ */
+VALUE rb_profile_frame_classpath(VALUE frame);
+
+/**
+ * Queries if the method of the passed frame is a singleton class.
+ *
+ * @param[in]  frame        What rb_profile_frames() returned.
+ * @retval     RUBY_Qtrue   It is a singleton method.
+ * @retval     RUBY_Qfalse  Otherwise (normal method/non-method).
+ */
+VALUE rb_profile_frame_singleton_method_p(VALUE frame);
+
+/**
+ * Queries the name of the method of the passed frame.
+ *
+ * @param[in]  frame      What rb_profile_frames() returned.
+ * @retval     RUBY_Qnil  The frame in question is not a method.
+ * @retval     otherwise  Name of the method of the frame.
+ */
+VALUE rb_profile_frame_method_name(VALUE frame);
+
+/**
+ * Identical  to  rb_profile_frame_method_name(),  except  it  "qualifies"  the
+ * return value with its defining class.
+ *
+ * @param[in]  frame      What rb_profile_frames() returned.
+ * @retval     RUBY_Qnil  The frame in question is not a method.
+ * @retval     otherwise  Qualified name of the method of the frame.
+ */
+VALUE rb_profile_frame_qualified_method_name(VALUE frame);
+
+/** @} */
+
+/**
+ * @name Debug inspector APIs
+ *
+ * @{
+ */
+
+/** Opaque struct representing a debug inspector. */
+typedef struct rb_debug_inspector_struct rb_debug_inspector_t;
+
+/**
+ * Type  of   the  callback   function  passed   to  rb_debug_inspector_open().
+ * Inspection  shall happen  only inside  of  them.  The  passed pointers  gets
+ * invalidated once after the callback returns.
+ *
+ * @param[in]      dc    A debug context.
+ * @param[in,out]  data  What was passed to rb_debug_inspector_open().
+ * @return         What would be the return value of rb_debug_inspector_open().
+ */
+typedef VALUE (*rb_debug_inspector_func_t)(const rb_debug_inspector_t *dc, void *data);
+
+/**
+ * Prepares, executes, then cleans up a debug session.
+ *
+ * @param[in]      func  A callback to run inside of a debug session.
+ * @param[in,out]  data  Passed as-is to `func`.
+ * @return         What was returned from `func`.
+ */
+VALUE rb_debug_inspector_open(rb_debug_inspector_func_t func, void *data);
+
+/**
+ * Queries  the backtrace  object  of the  context.   This is  as  if you  call
+ * `caller_locations` at the point of debugger.
+ *
+ * @param[in]  dc  A debug context.
+ * @return     An array  of `Thread::Backtrace::Location` which  represents the
+ *             current point of execution at `dc`.
+
+ */
+VALUE rb_debug_inspector_backtrace_locations(const rb_debug_inspector_t *dc);
+
+/**
+ * Queries the current receiver of the passed context's upper frame.
+ *
+ * @param[in]  dc           A debug context.
+ * @param[in]  index        Index of the frame from top to bottom.
+ * @exception  rb_eArgError `index` out of range.
+ * @return     The current receiver at `index`-th frame.
+ */
+VALUE rb_debug_inspector_frame_self_get(const rb_debug_inspector_t *dc, long index);
+
+/**
+ * Queries the current class of the passed context's upper frame.
+ *
+ * @param[in]  dc           A debug context.
+ * @param[in]  index        Index of the frame from top to bottom.
+ * @exception  rb_eArgError `index` out of range.
+ * @return     The current class at `index`-th frame.
+ */
+VALUE rb_debug_inspector_frame_class_get(const rb_debug_inspector_t *dc, long index);
+
+/**
+ * Queries the binding of the passed context's upper frame.
+ *
+ * @param[in]  dc           A debug context.
+ * @param[in]  index        Index of the frame from top to bottom.
+ * @exception  rb_eArgError `index` out of range.
+ * @return     The binding at `index`-th frame.
+ */
+VALUE rb_debug_inspector_frame_binding_get(const rb_debug_inspector_t *dc, long index);
+
+/**
+ * Queries the instruction sequence of the passed context's upper frame.
+ *
+ * @param[in]  dc           A debug context.
+ * @param[in]  index        Index of the frame from top to bottom.
+ * @exception  rb_eArgError `index` out of range.
+ * @retval     RUBY_Qnil    `index`-th frame is not in Ruby (C etc.).
+ * @retval     otherwise    An instance  of `RubyVM::InstructionSequence` which
+ *                          represents the  instruction sequence  at `index`-th
+ *                          frame.
+ */
+VALUE rb_debug_inspector_frame_iseq_get(const rb_debug_inspector_t *dc, long index);
+
+/**
+ * Queries the depth of the passed context's upper frame.
+ *
+ * Note that the depth is not same as the frame index because debug_inspector
+ * skips some special frames but the depth counts all frames.
+ *
+ * @param[in]  dc           A debug context.
+ * @param[in]  index        Index of the frame from top to bottom.
+ * @exception  rb_eArgError `index` out of range.
+ * @retval     The depth at `index`-th frame in Integer.
+ */
+VALUE rb_debug_inspector_frame_depth(const rb_debug_inspector_t *dc, long index);
+
+// A macro to recognize `rb_debug_inspector_frame_depth()` is available or not
+#define RB_DEBUG_INSPECTOR_FRAME_DEPTH(dc, index) rb_debug_inspector_frame_depth(dc, index)
+
+/**
+ * Return current frmae depth.
+ *
+ * @retval     The depth of the current frame in Integer.
+ */
+VALUE rb_debug_inspector_current_depth(void);
+
+/** @} */
+
+/**
+ * @name Old style set_trace_func APIs
+ *
+ * @{
+ */
+
+/* duplicated def of include/ruby/ruby.h */
+#include "ruby/internal/event.h"
+
+/**
+ * Identical to  rb_remove_event_hook(), except it additionally  takes the data
+ * argument.  This extra  argument is the same as  that of rb_add_event_hook(),
+ * and this function removes the hook which matches both arguments at once.
+ *
+ * @param[in]  func  A callback.
+ * @param[in]  data  What to be passed to `func`.
+ * @return     Number of deleted event hooks.
+ * @note       As  multiple  events can  share  the  same  `func` it  is  quite
+ *             possible for the return value to become more than one.
+ */
+int rb_remove_event_hook_with_data(rb_event_hook_func_t func, VALUE data);
+
+/**
+ * Identical to rb_add_event_hook(), except its effect is limited to the passed
+ * thread.  Other threads are not affected by this.
+ *
+ * @param[in]  thval          An instance of ::rb_cThread.
+ * @param[in]  func           A callback.
+ * @param[in]  events         A set of events that `func` should run.
+ * @param[in]  data           Passed as-is to `func`.
+ * @exception  rb_eTypeError  `thval` is not a thread.
+ */
+void rb_thread_add_event_hook(VALUE thval, rb_event_hook_func_t func, rb_event_flag_t events, VALUE data);
+
+/**
+ * Identical to  rb_remove_event_hook(), except it additionally  takes a thread
+ * argument.     This   extra    argument   is    the   same    as   that    of
+ * rb_thread_add_event_hook(), and this function removes the hook which matches
+ * both arguments at once.
+ *
+ * @param[in]  thval          An instance of ::rb_cThread.
+ * @param[in]  func           A callback.
+ * @exception  rb_eTypeError  `thval` is not a thread.
+ * @return     Number of deleted event hooks.
+ * @note       As  multiple  events can  share  the  same  `func` it  is  quite
+ *             possible for the return value to become more than one.
+ */
+int rb_thread_remove_event_hook(VALUE thval, rb_event_hook_func_t func);
+
+/**
+ * Identical to rb_thread_remove_event_hook(), except it additionally takes the
+ * data  argument.    It  can  also   be  seen   as  a  routine   identical  to
+ * rb_remove_event_hook_with_data(), except  it additionally takes  the thread.
+ * This function deletes hooks that satisfy all three criteria.
+ *
+ * @param[in]  thval          An instance of ::rb_cThread.
+ * @param[in]  func           A callback.
+ * @param[in]  data           What to be passed to `func`.
+ * @exception  rb_eTypeError  `thval` is not a thread.
+ * @return     Number of deleted event hooks.
+ * @note       As  multiple  events can  share  the  same  `func` it  is  quite
+ *             possible for the return value to become more than one.
+ */
+int rb_thread_remove_event_hook_with_data(VALUE thval, rb_event_hook_func_t func, VALUE data);
+
+/** @} */
+
+/**
+ * @name TracePoint APIs
+ *
+ * @{
+ */
+
+/**
+ * Creates a  tracepoint by  registering a  callback function  for one  or more
+ * tracepoint   events.  Once   the  tracepoint   is  created,   you  can   use
+ * rb_tracepoint_enable to enable the tracepoint.
+ *
+ * @param[in]      target_thread_not_supported_yet  Meant   for   picking   the
+ *                         thread  in which  the tracepoint  is to  be created.
+ *                         However,   current    implementation   ignore   this
+ *                         parameter,  tracepoint is  created for  all threads.
+ *                         Simply specify Qnil.
+ * @param[in]      events  Event(s) to listen to.
+ * @param[in]      func    A callback function.
+ * @param[in,out]  data    Void  pointer that  will be  passed to  the callback
+ *                         function.
+ *
+ * When the callback function is called, it will be passed 2 parameters:
+ *   1. `VALUE  tpval` -  the TracePoint  object from which  trace args  can be
+ *      extracted.
+ *   1. `void  *data` -  A void  pointer which  helps to  share scope  with the
+ *      callback function.
+ *
+ * It is important to note that you cannot register callbacks for normal events
+ * and internal events simultaneously because  they are different purpose.  You
+ * can use  any Ruby APIs  (calling methods and so  on) on normal  event hooks.
+ * However, in  internal events,  you can  not use any  Ruby APIs  (even object
+ * creations).   This is  why we  can't specify  internal events  by TracePoint
+ * directly.  Limitations are MRI version specific.
+ *
+ * Example:
+ *
+ * ```CXX
+ * rb_tracepoint_new(
+ *     Qnil,
+ *     RUBY_INTERNAL_EVENT_NEWOBJ | RUBY_INTERNAL_EVENT_FREEOBJ,
+ *     obj_event_i,
+ *     data);
+ * ```
+ *
+ * In this  example, a callback  function `obj_event_i` will be  registered for
+ * internal           events          #RUBY_INTERNAL_EVENT_NEWOBJ           and
+ * #RUBY_INTERNAL_EVENT_FREEOBJ.
+ */
+VALUE rb_tracepoint_new(VALUE target_thread_not_supported_yet, rb_event_flag_t events, void (*func)(VALUE, void *), void *data);
+
+/**
+ * Starts (enables) trace(s) defined by the passed object.  A TracePoint object
+ * does not immediately  take effect on creation.  You have  to explicitly call
+ * this API.
+ *
+ * @param[in]  tpval         An instance of TracePoint.
+ * @exception  rb_eArgError  A trace is already running.
+ * @return     Undefined value.  Forget this.  It should have returned `void`.
+ * @post       Trace(s) defined by `tpval` start.
+ */
+VALUE rb_tracepoint_enable(VALUE tpval);
+
+/**
+ * Stops (disables) an already running instance of TracePoint.
+ *
+ * @param[in]  tpval  An instance of TracePoint.
+ * @return     Undefined value.  Forget this.  It should have returned `void`.
+ * @post       Trace(s) defined by `tpval` stop.
+ */
+VALUE rb_tracepoint_disable(VALUE tpval);
+
+/**
+ * Queries if the passed TracePoint is up and running.
+ *
+ * @param[in]  tpval        An instance of TracePoint.
+ * @retval     RUBY_Qtrue   It is.
+ * @retval     RUBY_Qfalse  It isn't.
+ */
+VALUE rb_tracepoint_enabled_p(VALUE tpval);
+
+/**
+ * Type  that  represents  a  specific  trace  event.   Roughly  resembles  the
+ * tracepoint object that is passed to the block of `TracePoint.new`:
+ *
+ * ```ruby
+ * TracePoint.new(*events) do |obj|
+ *   ...                    # ^^^^^  Resembles this object.
+ * end
+ * ```
+ */
+typedef struct rb_trace_arg_struct rb_trace_arg_t;
+
+RBIMPL_ATTR_RETURNS_NONNULL()
+/**
+ * Queries the current event of the passed tracepoint.
+ *
+ * @param[in]  tpval             An instance of TracePoint.
+ * @exception  rb_eRuntimeError  `tpval` is disabled.
+ * @return     The current event.
+ *
+ * @internal
+ *
+ * `tpval` is  a fake.  There is  only one instance of  ::rb_trace_arg_t at one
+ * time.  This function just returns that global variable.
+ */
+rb_trace_arg_t *rb_tracearg_from_tracepoint(VALUE tpval);
+
+RBIMPL_ATTR_NONNULL(())
+/**
+ * Queries the event of the passed trace.
+ *
+ * @param[in]  trace_arg  A trace instance.
+ * @return     Its event.
+ */
+rb_event_flag_t rb_tracearg_event_flag(rb_trace_arg_t *trace_arg);
+
+RBIMPL_ATTR_NONNULL(())
+/**
+ * Identical to  rb_tracearg_event_flag(), except  it returns  the name  of the
+ * event in Ruby's symbol.
+ *
+ * @param[in]  trace_arg  A trace instance.
+ * @return     Its event, in Ruby level Symbol object.
+ */
+VALUE rb_tracearg_event(rb_trace_arg_t *trace_arg);
+
+RBIMPL_ATTR_NONNULL(())
+/**
+ * Queries the line of the point where the trace is at.
+ *
+ * @param[in]  trace_arg  A trace instance.
+ * @retval     0          The trace is not at Ruby frame.
+ * @return     otherwise  Its line number.
+ */
+VALUE rb_tracearg_lineno(rb_trace_arg_t *trace_arg);
+
+RBIMPL_ATTR_NONNULL(())
+/**
+ * Queries the file name of the point where the trace is at.
+ *
+ * @param[in]  trace_arg  A trace instance.
+ * @retval     RUBY_Qnil  The trace is not at Ruby frame.
+ * @retval     otherwise  Its path.
+ */
+VALUE rb_tracearg_path(rb_trace_arg_t *trace_arg);
+
+RBIMPL_ATTR_NONNULL(())
+/**
+ * Queries the method name of the point where the trace is at.
+ *
+ * @param[in]  trace_arg  A trace instance.
+ * @retval     RUBY_Qnil  There is no method.
+ * @retval     otherwise  Its method name, in Ruby level Symbol.
+ */
+VALUE rb_tracearg_method_id(rb_trace_arg_t *trace_arg);
+
+RBIMPL_ATTR_NONNULL(())
+/**
+ * Identical  to  rb_tracearg_method_id(), except  it  returns  callee id  like
+ * rb_frame_callee().
+ *
+ * @param[in]  trace_arg  A trace instance.
+ * @retval     RUBY_Qnil  There is no method.
+ * @retval     otherwise  Its method name, in Ruby level Symbol.
+ */
+VALUE rb_tracearg_callee_id(rb_trace_arg_t *trace_arg);
+
+RBIMPL_ATTR_NONNULL(())
+/**
+ * Queries the class that defines the method that the passed trace is at.  This
+ * can be different from the class of rb_tracearg_self()'s return value because
+ * of inheritance(s).
+ *
+ * @param[in]  trace_arg  A trace instance.
+ * @retval     RUBY_Qnil  There is no method.
+ * @retval     otherwise  Its method's class.
+ */
+VALUE rb_tracearg_defined_class(rb_trace_arg_t *trace_arg);
+
+RBIMPL_ATTR_NONNULL(())
+/**
+ * Creates a binding object of the point where the trace is at.
+ *
+ * @param[in]  trace_arg  A trace instance.
+ * @retval     RUBY_Qnil  The point has no binding.
+ * @retval     otherwise  Its binding.
+ *
+ * @internal
+ *
+ * @shyouhei  has  no  idea  on  which situation  shall  this  function  return
+ * ::RUBY_Qnil.
+ */
+VALUE rb_tracearg_binding(rb_trace_arg_t *trace_arg);
+
+RBIMPL_ATTR_NONNULL(())
+/**
+ * Queries the receiver of the point trace is at.
+ *
+ * @param[in]  trace_arg  A trace instance.
+ * @return     Its receiver.
+ */
+VALUE rb_tracearg_self(rb_trace_arg_t *trace_arg);
+
+RBIMPL_ATTR_NONNULL(())
+/**
+ * Queries the return value that the trace represents.
+ *
+ * @param[in]  trace_arg         A trace instance.
+ * @exception  rb_eRuntimeError  The tracing event is not return-related.
+ * @return     The return value.
+ */
+VALUE rb_tracearg_return_value(rb_trace_arg_t *trace_arg);
+
+RBIMPL_ATTR_NONNULL(())
+/**
+ * Queries the raised exception that the trace represents.
+ *
+ * @param[in]  trace_arg         A trace instance.
+ * @exception  rb_eRuntimeError  The tracing event is not exception-related.
+ * @return     The raised exception.
+ */
+VALUE rb_tracearg_raised_exception(rb_trace_arg_t *trace_arg);
+
+RBIMPL_ATTR_NONNULL(())
+/**
+ * Queries the allocated/deallocated object that the trace represents.
+ *
+ * @param[in]  trace_arg         A trace instance.
+ * @exception  rb_eRuntimeError  The tracing event is not GC-related.
+ * @return     The allocated/deallocated object.
+ */
+VALUE rb_tracearg_object(rb_trace_arg_t *trace_arg);
+
+
+/** @} */
+
+/**
+ * @name Postponed Job API
+ *
+ * @{
+ */
+
+/*
+ * Postponed Job API
+ * rb_postponed_job_register and rb_postponed_job_register_one are
+ * async-signal-safe and used via SIGPROF by the "stackprof" RubyGem
+ */
+
+/**
+ * Type of postponed jobs.
+ *
+ * @param[in,out]  arg What was passed to rb_postponed_job_register().
+ */
+typedef void (*rb_postponed_job_func_t)(void *arg);
+
+/**
+ * Registers a postponed job.
+ *
+ * There  are situations  when running  a ruby  program is  not possible.   For
+ * instance when  a program is in  a signal handler; for  another instance when
+ * the GC  is busy.   On such situations  however, there might  be needs  to do
+ * something.  We cannot but defer such operations until we are 100% sure it is
+ * safe  to execute  them.   This  mechanism is  called  postponed jobs.   This
+ * function  registers a  new one.   The registered  job would  eventually gets
+ * executed.
+ *
+ * @param[in]      flags      (Unused) reserved for future extensions.
+ * @param[in]      func       Job body.
+ * @param[in,out]  data       Passed as-is to `func`.
+ * @retval         0          Postponed job buffer is full.  Failed.
+ * @retval         otherwise  Opaque return value.
+ * @post           The passed job is postponed.
+ */
+int rb_postponed_job_register(unsigned int flags, rb_postponed_job_func_t func, void *data);
+
+/**
+ * Identical to rb_postponed_job_register_one(),  except it additionally checks
+ * for  duplicated registration.   In case  the passed  job is  already in  the
+ * postponed job buffer this function does nothing.
+ *
+ * @param[in]      flags      (Unused) reserved for future extensions.
+ * @param[in]      func       Job body.
+ * @param[in,out]  data       Passed as-is to `func`.
+ * @retval         0          Postponed job buffer is full.  Failed.
+ * @retval         otherwise  Opaque return value.
+ */
+int rb_postponed_job_register_one(unsigned int flags, rb_postponed_job_func_t func, void *data);
+
+/** @} */
+
+/**
+ * @cond INTERNAL_MACRO
+ *
+ * Anything  after this  are  intentionally left  undocumented,  to honour  the
+ * comment below.
+ */
+
+/* undocumented advanced tracing APIs */
+
+typedef enum {
+    RUBY_EVENT_HOOK_FLAG_SAFE    = 0x01,
+    RUBY_EVENT_HOOK_FLAG_DELETED = 0x02,
+    RUBY_EVENT_HOOK_FLAG_RAW_ARG = 0x04
+} rb_event_hook_flag_t;
+
+void rb_add_event_hook2(rb_event_hook_func_t func, rb_event_flag_t events, VALUE data, rb_event_hook_flag_t hook_flag);
+void rb_thread_add_event_hook2(VALUE thval, rb_event_hook_func_t func, rb_event_flag_t events, VALUE data, rb_event_hook_flag_t hook_flag);
+
+/** @endcond */
+
+RBIMPL_SYMBOL_EXPORT_END()
+
+#endif /* RUBY_DEBUG_H */

libs/libruby/ruby/defines.h

@@ -0,0 +1,116 @@
+#ifndef RUBY_DEFINES_H /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_DEFINES_H 1
+/**
+ * @file
+ * @author     $Author$
+ * @date       Wed May 18 00:21:44 JST 1994
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ */
+
+#include "ruby/internal/config.h"
+
+/* AC_INCLUDES_DEFAULT */
+#include <stdio.h>
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+
+#ifdef STDC_HEADERS
+#include <stddef.h>
+#include <stdlib.h>
+#else
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#endif
+
+#ifdef HAVE_STRING_H
+#if !defined STDC_HEADERS && defined HAVE_MEMORY_H
+#include <memory.h>
+#endif
+#include <string.h>
+#endif
+
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+
+#ifdef HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif
+
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
+
+#ifdef HAVE_STDALIGN_H
+#include <stdalign.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+
+#ifdef RUBY_USE_SETJMPEX
+#include <setjmpex.h>
+#endif
+
+#include "ruby/backward/2/assume.h"
+#include "ruby/backward/2/attributes.h"
+#include "ruby/backward/2/bool.h"
+#include "ruby/backward/2/long_long.h"
+#include "ruby/backward/2/stdalign.h"
+#include "ruby/backward/2/stdarg.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/dosish.h"
+#include "ruby/internal/xmalloc.h"
+#include "ruby/missing.h"
+
+/**
+ * Asserts that the compilation unit includes  Ruby's CAPI.  This has been here
+ * since the very beginning (at least since version 0.49).
+ */
+#define RUBY
+
+#ifdef __GNUC__
+#/** This is expanded to nothing for non-GCC compilers. */
+#define RB_GNUC_EXTENSION __extension__
+#/** This is expanded to the passed token for non-GCC compilers. */
+#define RB_GNUC_EXTENSION_BLOCK(x) __extension__({ x; })
+#else
+#define RB_GNUC_EXTENSION
+#define RB_GNUC_EXTENSION_BLOCK(x) (x)
+#endif
+
+/** @cond INTERNAL_MACRO */
+
+/* :FIXME:  Can someone  tell us  why is  this macro  defined here?   @shyouhei
+ * thinks this  is a  truly internal  macro but cannot  move around  because he
+ * doesn't understand the reason of this arrangement. */
+#ifndef RUBY_MBCHAR_MAXSIZE
+#define RUBY_MBCHAR_MAXSIZE INT_MAX
+#/* MB_CUR_MAX will not work well in C locale */
+#endif
+
+#if defined(__sparc)
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+void rb_sparc_flush_register_windows(void);
+RBIMPL_SYMBOL_EXPORT_END()
+#define FLUSH_REGISTER_WINDOWS rb_sparc_flush_register_windows()
+#else
+#define FLUSH_REGISTER_WINDOWS ((void)0)
+#endif
+/** @endcond */
+#endif /* RUBY_DEFINES_H */

libs/libruby/ruby/digest.h

@@ -0,0 +1,72 @@
+/************************************************
+
+  digest.h - header file for ruby digest modules
+
+  $Author$
+  created at: Fri May 25 08:54:56 JST 2001
+
+
+  Copyright (C) 2001-2006 Akinori MUSHA
+
+  $RoughId: digest.h,v 1.3 2001/07/13 15:38:27 knu Exp $
+  $Id$
+
+************************************************/
+
+#include "ruby.h"
+
+#define RUBY_DIGEST_API_VERSION	3
+
+typedef int (*rb_digest_hash_init_func_t)(void *);
+typedef void (*rb_digest_hash_update_func_t)(void *, unsigned char *, size_t);
+typedef int (*rb_digest_hash_finish_func_t)(void *, unsigned char *);
+
+typedef struct {
+    int api_version;
+    size_t digest_len;
+    size_t block_len;
+    size_t ctx_size;
+    rb_digest_hash_init_func_t init_func;
+    rb_digest_hash_update_func_t update_func;
+    rb_digest_hash_finish_func_t finish_func;
+} rb_digest_metadata_t;
+
+#define DEFINE_UPDATE_FUNC_FOR_UINT(name) \
+void \
+rb_digest_##name##_update(void *ctx, unsigned char *ptr, size_t size) \
+{ \
+    const unsigned int stride = 16384; \
+ \
+    for (; size > stride; size -= stride, ptr += stride) { \
+        name##_Update(ctx, ptr, stride); \
+    } \
+    if (size > 0) name##_Update(ctx, ptr, size); \
+}
+
+#define DEFINE_FINISH_FUNC_FROM_FINAL(name) \
+int \
+rb_digest_##name##_finish(void *ctx, unsigned char *ptr) \
+{ \
+    return name##_Final(ptr, ctx); \
+}
+
+static inline VALUE
+rb_digest_namespace(void)
+{
+    rb_require("digest");
+    return rb_path2class("Digest");
+}
+
+static inline ID
+rb_id_metadata(void)
+{
+    return rb_intern_const("metadata");
+}
+
+static inline VALUE
+rb_digest_make_metadata(const rb_digest_metadata_t *meta)
+{
+#undef RUBY_UNTYPED_DATA_WARNING
+#define RUBY_UNTYPED_DATA_WARNING 0
+    return rb_obj_freeze(Data_Wrap_Struct(0, 0, 0, (void *)meta));
+}

libs/libruby/ruby/encoding.h

@@ -0,0 +1,31 @@
+#ifndef RUBY_ENCODING_H                              /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_ENCODING_H 1
+/**
+ * @file
+ * @author     $Author: matz $
+ * @date       Thu May 24 11:49:41 JST 2007
+ * @copyright  Copyright (C) 2007 Yukihiro Matsumoto
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @brief      Encoding relates APIs.
+ *
+ * These APIs are mainly for  implementing encodings themselves.  Encodings are
+ * built on  top of  Ruby's core  CAPIs.  Though not  prohibited, there  can be
+ * relatively less rooms for things in  this header file be useful when writing
+ * an extension library.
+ */
+#include "ruby/ruby.h"
+
+#include "ruby/internal/encoding/coderange.h"
+#include "ruby/internal/encoding/ctype.h"
+#include "ruby/internal/encoding/encoding.h"
+#include "ruby/internal/encoding/pathname.h"
+#include "ruby/internal/encoding/re.h"
+#include "ruby/internal/encoding/sprintf.h"
+#include "ruby/internal/encoding/string.h"
+#include "ruby/internal/encoding/symbol.h"
+#include "ruby/internal/encoding/transcode.h"
+
+#endif /* RUBY_ENCODING_H */

libs/libruby/ruby/fiber/scheduler.h

@@ -0,0 +1,374 @@
+#ifndef RUBY_FIBER_SCHEDULER_H                       /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_FIBER_SCHEDULER_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @brief      Scheduler APIs.
+ */
+#include "ruby/internal/config.h"
+
+#include <errno.h>
+
+#ifdef STDC_HEADERS
+#include <stddef.h> /* size_t */
+#endif
+
+#include "ruby/ruby.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/arithmetic.h"
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+
+#define RUBY_FIBER_SCHEDULER_VERSION 2
+
+struct timeval;
+
+/**
+ * Wrap a `ssize_t` and `int errno` into a single `VALUE`. This interface should
+ * be used to safely capture results from system calls  like `read` and `write`.
+ *
+ * You should use `rb_fiber_scheduler_io_result_apply` to unpack the result of
+ * this value and update `int errno`.
+ *
+ * You should not directly try to interpret the result value as it is considered
+ * an opaque representation. However, the general representation is an integer
+ * in the range of `[-int errno, size_t size]`. Linux generally restricts the
+ * result of system calls like `read` and `write` to `<= 2^31` which means this
+ * will typically fit within a single FIXNUM.
+ *
+ * @param[in]  result   The result of the system call.
+ * @param[in]  error    The value of `errno`.
+ * @return              A `VALUE` which contains the result and/or errno.
+ */
+static inline VALUE
+rb_fiber_scheduler_io_result(ssize_t result, int error)
+{
+    if (result == -1) {
+        return RB_INT2NUM(-error);
+    }
+    else {
+        return RB_SIZE2NUM(result);
+    }
+}
+
+/**
+ * Apply an io result to the local thread, returning the value of the original
+ * system call that created it and updating `int errno`.
+ *
+ * You should not directly try to interpret the result value as it is considered
+ * an opaque representation.
+ *
+ * @param[in]  result   The `VALUE` which contains an errno and/or result size.
+ * @post                Updates `int errno` with the value if negative.
+ * @return              The original result of the system call.
+ */
+static inline ssize_t
+rb_fiber_scheduler_io_result_apply(VALUE result)
+{
+    if (RB_FIXNUM_P(result) && RB_NUM2INT(result) < 0) {
+        errno = -RB_NUM2INT(result);
+        return -1;
+    }
+    else {
+        return RB_NUM2SIZE(result);
+    }
+}
+
+/**
+ * Queries the  current scheduler of  the current  thread that is  calling this
+ * function.
+ *
+ * @retval  RUBY_Qnil  No scheduler has  been set so far to  this thread (which
+ *                     is the default).
+ * @retval  otherwise  The scheduler that  was last set for  the current thread
+ *                     with rb_fiber_scheduler_set().
+ */
+VALUE rb_fiber_scheduler_get(void);
+
+/**
+ * Destructively assigns  the passed  scheduler to that  of the  current thread
+ * that is calling this function.  If the scheduler is set, non-blocking fibers
+ * (created by `Fiber.new` with `blocking: false`, or by `Fiber.schedule`) call
+ * that scheduler's  hook methods on  potentially blocking operations,  and the
+ * current  thread  will  call  scheduler's  `#close`  method  on  finalisation
+ * (allowing  the  scheduler  to  properly  manage  all  non-finished  fibers).
+ * `scheduler`   can   be   an   object   of   any   class   corresponding   to
+ * `Fiber::SchedulerInterface`. Its implementation is up to the user.
+ *
+ * @param[in]  scheduler     The scheduler to set.
+ * @exception  rb_eArgError  `scheduler` does not conform the interface.
+ * @post       Current thread's scheduler is `scheduler`.
+ */
+VALUE rb_fiber_scheduler_set(VALUE scheduler);
+
+/**
+ * Identical to rb_fiber_scheduler_get(), except it also returns ::RUBY_Qnil in
+ * case of a blocking fiber.  As blocking fibers do not participate schedulers'
+ * scheduling this function can be handy.
+ *
+ * @retval  RUBY_Qnil  No scheduler is in effect.
+ * @retval  otherwise  The scheduler that is in effect, if any.
+ */
+VALUE rb_fiber_scheduler_current(void);
+
+/**
+ * Identical to rb_fiber_scheduler_current(), except it queries for that of the
+ * passed thread instead of the implicit current one.
+ *
+ * @param[in]  thread         Target thread.
+ * @exception  rb_eTypeError  `thread` is not a thread.
+ * @retval     RUBY_Qnil      No scheduler is in effect in `thread`.
+ * @retval     otherwise      The scheduler that is in effect in `thread`.
+ */
+VALUE rb_fiber_scheduler_current_for_thread(VALUE thread);
+
+/**
+ * Converts the passed timeout to an expression that rb_fiber_scheduler_block()
+ * etc. expects.
+ *
+ * @param[in]  timeout    A duration (can be `NULL`).
+ * @retval     RUBY_Qnil  No timeout (blocks indefinitely).
+ * @retval     otherwise  A timeout object.
+ */
+VALUE rb_fiber_scheduler_make_timeout(struct timeval *timeout);
+
+/**
+ * Closes the passed scheduler object.  This expects the scheduler to wait for
+ * all fibers.  Thus the scheduler's main loop tends to start here.
+ *
+ * @param[in]  scheduler  Target scheduler.
+ * @return     What `scheduler.close` returns.
+ */
+VALUE rb_fiber_scheduler_close(VALUE scheduler);
+
+/**
+ * Non-blocking  `sleep`.  Depending  on  scheduler  implementation,  this  for
+ * instance switches to another fiber etc.
+ *
+ * @param[in]  scheduler  Target scheduler.
+ * @param[in]  duration   Passed as-is to `scheduler.kernel_sleep`.
+ * @return     What `scheduler.kernel_sleep` returns.
+ */
+VALUE rb_fiber_scheduler_kernel_sleep(VALUE scheduler, VALUE duration);
+
+/**
+ * Identical to rb_fiber_scheduler_kernel_sleep(), except  it can pass multiple
+ * arguments.
+ *
+ * @param[in]  scheduler  Target scheduler.
+ * @param[in]  argc       Number of objects of `argv`.
+ * @param[in]  argv       Passed as-is to `scheduler.kernel_sleep`
+ * @return     What `scheduler.kernel_sleep` returns.
+ */
+VALUE rb_fiber_scheduler_kernel_sleepv(VALUE scheduler, int argc, VALUE * argv);
+
+/* Description TBW */
+#if 0
+VALUE rb_fiber_scheduler_timeout_after(VALUE scheduler, VALUE timeout, VALUE exception, VALUE message);
+VALUE rb_fiber_scheduler_timeout_afterv(VALUE scheduler, int argc, VALUE * argv);
+int rb_fiber_scheduler_supports_process_wait(VALUE scheduler);
+#endif
+
+/**
+ * Non-blocking `waitpid`.  Depending  on  scheduler  implementation, this  for
+ * instance switches to another fiber etc.
+ *
+ * @param[in]  scheduler  Target scheduler.
+ * @param[in]  pid        Process ID to wait.
+ * @param[in]  flags      Wait flags, e.g. `WUNTRACED`.
+ * @return     What `scheduler.process_wait` returns.
+ */
+VALUE rb_fiber_scheduler_process_wait(VALUE scheduler, rb_pid_t pid, int flags);
+
+/**
+ * Non-blocking  wait  for  the  passed   "blocker",  which  is   for  instance
+ * `Thread.join` or `Mutex.lock`.  Depending  on scheduler implementation, this
+ * for instance switches to another fiber etc.
+ *
+ * @param[in]  scheduler  Target scheduler.
+ * @param[in]  blocker    What blocks the current fiber.
+ * @param[in]  timeout    Numeric timeout.
+ * @return     What `scheduler.block` returns.
+ */
+VALUE rb_fiber_scheduler_block(VALUE scheduler, VALUE blocker, VALUE timeout);
+
+/**
+ * Wakes up a fiber previously blocked using rb_fiber_scheduler_block().
+ *
+ * @param[in]  scheduler  Target scheduler.
+ * @param[in]  blocker    What was awaited for.
+ * @param[in]  fiber      What to unblock.
+ * @return     What `scheduler.unblock` returns.
+ */
+VALUE rb_fiber_scheduler_unblock(VALUE scheduler, VALUE blocker, VALUE fiber);
+
+/**
+ * Non-blocking version of rb_io_wait().  Depending on scheduler
+ * implementation, this for instance switches to another fiber etc.
+ *
+ * The  "events" here  is a  Ruby level  integer, which  is an  OR-ed value  of
+ * `IO::READABLE`, `IO::WRITABLE`, and `IO::PRIORITY`.
+ *
+ * @param[in]  scheduler  Target scheduler.
+ * @param[in]  io         An io object to wait.
+ * @param[in]  events     An integer set of interests.
+ * @param[in]  timeout    Numeric timeout.
+ * @return     What `scheduler.io_wait` returns.
+ */
+VALUE rb_fiber_scheduler_io_wait(VALUE scheduler, VALUE io, VALUE events, VALUE timeout);
+
+/**
+ * Non-blocking  wait until the passed  IO  is ready  for reading.   This is  a
+ * special  case   of  rb_fiber_scheduler_io_wait(),  where  the   interest  is
+ * `IO::READABLE` and timeout is never.
+ *
+ * @param[in]  scheduler  Target scheduler.
+ * @param[in]  io         An io object to wait.
+ * @return     What `scheduler.io_wait` returns.
+ */
+VALUE rb_fiber_scheduler_io_wait_readable(VALUE scheduler, VALUE io);
+
+/**
+ * Non-blocking  wait until  the passed  IO  is ready  for writing.   This is a
+ * special  case   of  rb_fiber_scheduler_io_wait(),  where  the   interest  is
+ * `IO::WRITABLE` and timeout is never.
+ *
+ * @param[in]  scheduler  Target scheduler.
+ * @param[in]  io         An io object to wait.
+ * @return     What `scheduler.io_wait` returns.
+ */
+VALUE rb_fiber_scheduler_io_wait_writable(VALUE scheduler, VALUE io);
+
+/**
+ * Non-blocking version of `IO.select`.
+ *
+ * It's possible that this will be emulated using a thread, so you should not
+ * rely on it for high performance.
+ *
+ * @param[in]  scheduler    Target scheduler.
+ * @param[in]  readables    An array of readable objects.
+ * @param[in]  writables    An array of writable objects.
+ * @param[in]  exceptables  An array of objects that might encounter exceptional conditions.
+ * @param[in]  timeout      Numeric timeout or nil.
+ * @return     What `scheduler.io_select` returns, normally a 3-tuple of arrays of ready objects.
+ */
+VALUE rb_fiber_scheduler_io_select(VALUE scheduler, VALUE readables, VALUE writables, VALUE exceptables, VALUE timeout);
+
+/**
+ * Non-blocking version of `IO.select`, `argv` variant.
+ */
+VALUE rb_fiber_scheduler_io_selectv(VALUE scheduler, int argc, VALUE *argv);
+
+/**
+ * Non-blocking read from the passed IO.
+ *
+ * @param[in]   scheduler    Target scheduler.
+ * @param[out]  io           An io object to read from.
+ * @param[out]  buffer       Return buffer.
+ * @param[in]   length       Requested number of bytes to read.
+ * @param[in]   offset       The offset in the buffer to read to.
+ * @retval      RUBY_Qundef  `scheduler` doesn't have `#io_read`.
+ * @return      otherwise    What `scheduler.io_read` returns `[-errno, size]`.
+ */
+VALUE rb_fiber_scheduler_io_read(VALUE scheduler, VALUE io, VALUE buffer, size_t length, size_t offset);
+
+/**
+ * Non-blocking write to the passed IO.
+ *
+ * @param[in]   scheduler    Target scheduler.
+ * @param[out]  io           An io object to write to.
+ * @param[in]   buffer       What to write.
+ * @param[in]   length       Number of bytes to write.
+ * @param[in]   offset       The offset in the buffer to write from.
+ * @retval      RUBY_Qundef  `scheduler` doesn't have `#io_write`.
+ * @return      otherwise    What `scheduler.io_write` returns `[-errno, size]`.
+ */
+VALUE rb_fiber_scheduler_io_write(VALUE scheduler, VALUE io, VALUE buffer, size_t length, size_t offset);
+
+/**
+ * Non-blocking read from the passed IO at the specified offset.
+ *
+ * @param[in]   scheduler    Target scheduler.
+ * @param[out]  io           An io object to read from.
+ * @param[in]   from         The offset in the given IO to read the data from.
+ * @param[out]  buffer       The buffer to read the data to.
+ * @param[in]   length       Requested number of bytes to read.
+ * @param[in]   offset       The offset in the buffer to read to.
+ * @retval      RUBY_Qundef  `scheduler` doesn't have `#io_read`.
+ * @return      otherwise    What `scheduler.io_read` returns.
+ */
+VALUE rb_fiber_scheduler_io_pread(VALUE scheduler, VALUE io, rb_off_t from, VALUE buffer, size_t length, size_t offset);
+
+/**
+ * Non-blocking write to the passed IO at the specified offset.
+ *
+ * @param[in]   scheduler    Target scheduler.
+ * @param[out]  io           An io object to write to.
+ * @param[in]   from         The offset in the given IO to write the data to.
+ * @param[in]   buffer       The buffer to write the data from.
+ * @param[in]   length       Number of bytes to write.
+ * @param[in]   offset       The offset in the buffer to write from.
+ * @retval      RUBY_Qundef  `scheduler` doesn't have `#io_write`.
+ * @return      otherwise    What `scheduler.io_write` returns.
+ */
+VALUE rb_fiber_scheduler_io_pwrite(VALUE scheduler, VALUE io, rb_off_t from, VALUE buffer, size_t length, size_t offset);
+
+/**
+ * Non-blocking read from the passed IO using a native buffer.
+ *
+ * @param[in]   scheduler    Target scheduler.
+ * @param[out]  io           An io object to read from.
+ * @param[out]  buffer       Return buffer.
+ * @param[in]   size         Size of the return buffer.
+ * @param[in]   length       Requested number of bytes to read.
+ * @retval      RUBY_Qundef  `scheduler` doesn't have `#io_read`.
+ * @return      otherwise    What `scheduler.io_read` returns.
+ */
+VALUE rb_fiber_scheduler_io_read_memory(VALUE scheduler, VALUE io, void *buffer, size_t size, size_t length);
+
+/**
+ * Non-blocking write to the passed IO using a native buffer.
+ *
+ * @param[in]   scheduler    Target scheduler.
+ * @param[out]  io           An io object to write to.
+ * @param[in]   buffer       What to write.
+ * @param[in]   size         Size of the buffer.
+ * @param[in]   length       Number of bytes to write.
+ * @retval      RUBY_Qundef  `scheduler` doesn't have `#io_write`.
+ * @return      otherwise    What `scheduler.io_write` returns.
+ */
+VALUE rb_fiber_scheduler_io_write_memory(VALUE scheduler, VALUE io, const void *buffer, size_t size, size_t length);
+
+/**
+ * Non-blocking close the given IO.
+ *
+ * @param[in]  scheduler    Target scheduler.
+ * @param[in]  io           An io object to close.
+ * @retval     RUBY_Qundef  `scheduler` doesn't have `#io_close`.
+ * @return     otherwise    What `scheduler.io_close` returns.
+ */
+VALUE rb_fiber_scheduler_io_close(VALUE scheduler, VALUE io);
+
+/**
+ * Non-blocking DNS lookup.
+ *
+ * @param[in]  scheduler    Target scheduler.
+ * @param[in]  hostname     A host name to query.
+ * @retval     RUBY_Qundef  `scheduler` doesn't have `#address_resolve`.
+ * @return     otherwise    What `scheduler.address_resolve` returns.
+ */
+VALUE rb_fiber_scheduler_address_resolve(VALUE scheduler, VALUE hostname);
+
+/**
+ * Create and schedule a non-blocking fiber.
+ *
+ */
+VALUE rb_fiber_scheduler_fiber(VALUE scheduler, int argc, VALUE *argv, int kw_splat);
+
+RBIMPL_SYMBOL_EXPORT_END()
+
+#endif /* RUBY_FIBER_SCHEDULER_H */

libs/libruby/ruby/intern.h

@@ -0,0 +1,64 @@
+#ifndef RUBY_INTERN_H                                /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_INTERN_H 1
+/**
+ * @file
+ * @author     $Author$
+ * @date       Thu Jun 10 14:22:17 JST 1993
+ * @copyright  Copyright (C) 1993-2007 Yukihiro Matsumoto
+ * @copyright  Copyright (C) 2000  Network Applied Communication Laboratory, Inc.
+ * @copyright  Copyright (C) 2000  Information-technology Promotion Agency, Japan
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ */
+#include "ruby/internal/config.h"
+#include "ruby/defines.h"
+
+#include <stdarg.h>
+
+#include "ruby/st.h"
+
+/*
+ * Functions and variables that are used by more than one source file of
+ * the kernel.
+ */
+
+#include "ruby/internal/intern/array.h"
+#include "ruby/internal/intern/bignum.h"
+#include "ruby/internal/intern/class.h"
+#include "ruby/internal/intern/compar.h"
+#include "ruby/internal/intern/complex.h"
+#include "ruby/internal/intern/cont.h"
+#include "ruby/internal/intern/dir.h"
+#include "ruby/internal/intern/enum.h"
+#include "ruby/internal/intern/enumerator.h"
+#include "ruby/internal/intern/error.h"
+#include "ruby/internal/intern/eval.h"
+#include "ruby/internal/intern/file.h"
+#include "ruby/internal/intern/gc.h"
+#include "ruby/internal/intern/hash.h"
+#include "ruby/internal/intern/io.h"
+#include "ruby/internal/intern/load.h"
+#include "ruby/internal/intern/marshal.h"
+#include "ruby/internal/intern/numeric.h"
+#include "ruby/internal/intern/object.h"
+#include "ruby/internal/intern/parse.h"
+#include "ruby/internal/intern/proc.h"
+#include "ruby/internal/intern/process.h"
+#include "ruby/internal/intern/random.h"
+#include "ruby/internal/intern/range.h"
+#include "ruby/internal/intern/rational.h"
+#include "ruby/internal/intern/re.h"
+#include "ruby/internal/intern/ruby.h"
+#include "ruby/internal/intern/select.h"
+#include "ruby/internal/intern/signal.h"
+#include "ruby/internal/intern/sprintf.h"
+#include "ruby/internal/intern/string.h"
+#include "ruby/internal/intern/struct.h"
+#include "ruby/internal/intern/thread.h"
+#include "ruby/internal/intern/time.h"
+#include "ruby/internal/intern/variable.h"
+#include "ruby/internal/intern/vm.h"
+
+#endif /* RUBY_INTERN_H */

libs/libruby/ruby/internal/abi.h

@@ -0,0 +1,58 @@
+#ifndef RUBY_ABI_H
+#define RUBY_ABI_H
+
+#ifdef RUBY_ABI_VERSION /* should match the definition in config.h */
+
+/* This number represents Ruby's ABI version.
+ *
+ * In development Ruby, it should be bumped every time an ABI incompatible
+ * change is introduced. This will force other developers to rebuild extension
+ * gems.
+ *
+ * The following cases are considered as ABI incompatible changes:
+ * - Changing any data structures.
+ * - Changing macros or inline functions causing a change in behavior.
+ * - Deprecating or removing function declarations.
+ *
+ * The following cases are NOT considered as ABI incompatible changes:
+ * - Any changes that does not involve the header files in the `include`
+ *   directory.
+ * - Adding macros, inline functions, or function declarations.
+ * - Backwards compatible refactors.
+ * - Editing comments.
+ *
+ * In released versions of Ruby, this number is not defined since teeny
+ * versions of Ruby should guarantee ABI compatibility.
+ */
+#define RUBY_ABI_VERSION 3
+
+/* Windows does not support weak symbols so ruby_abi_version will not exist
+ * in the shared library. */
+#if defined(HAVE_FUNC_WEAK) && !defined(_WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__)
+# define RUBY_DLN_CHECK_ABI
+#endif
+#endif  /* RUBY_ABI_VERSION */
+
+#ifdef RUBY_DLN_CHECK_ABI
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+RUBY_FUNC_EXPORTED unsigned long long __attribute__((weak))
+ruby_abi_version(void)
+{
+# ifdef RUBY_ABI_VERSION
+    return RUBY_ABI_VERSION;
+# else
+    return 0;
+# endif
+}
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+#endif

libs/libruby/ruby/internal/anyargs.h

@@ -0,0 +1,376 @@
+#ifndef RBIMPL_ANYARGS_H                             /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ANYARGS_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Function overloads to issue warnings around #ANYARGS.
+ *
+ * For instance ::rb_define_method  takes a pointer to  #ANYARGS -ed functions,
+ * which in  fact varies 18  different prototypes.   We still need  to preserve
+ * #ANYARGS for storages but why not check the consistencies if possible.  With
+ * those complex macro overlays defined in  this header file, use of a function
+ * pointer gets checked against the corresponding arity argument.
+ *
+ * ### Q&A ###
+ *
+ * - Q: Where did the magic number "18" came from in the description above?
+ *
+ * - A: Count the case branch of `vm_method.c:call_cfunc_invoker_func()`.  Note
+ *      also that the 18  branches has lasted for at least  25 years.  See also
+ *      commit 200e0ee2fd3c1c006c528874a88f684447215524.
+ *
+ * - Q: What is this `__weakref__` thing?
+ *
+ * - A: That is a kind of function overloading mechanism that GCC provides.  In
+ *      this   case  for   instance  `rb_define_method_00`   is  an   alias  of
+ *      ::rb_define_method, with a strong type.
+ *
+ * - Q: What is this `__transparent_union__` thing?
+ *
+ *   A: That  is  another  kind  of function  overloading  mechanism  that  GCC
+ *      provides.   In this  case  the attributed  function  pointer is  either
+ *      `VALUE(*)(int,VALUE*,VALUE)` or `VALUE(*)(int,const VALUE*,VALUE)`.
+ *
+ *      This is better than `void*` or #ANYARGS because we can reject all other
+ *      possibilities than the two.
+ *
+ * - Q: What does this #rb_define_method macro mean?
+ *
+ * - A: It  selects  appropriate  alias  of  the  ::rb_define_method  function,
+ *      depending on the last (arity) argument.
+ *
+ * - Q: Why the special case for ::rb_f_notimplement ?
+ *
+ * - A: Function   pointer  to   ::rb_f_notimplement   is   special  cased   in
+ *      `vm_method.c:rb_add_method_cfunc()`.   That should  be  handled by  the
+ *      `__builtin_choose_expr`   chain  inside   of  #rb_define_method   macro
+ *      expansion.      In    order     to    do     so,    comparison     like
+ *      `(func == rb_f_notimplement)`        is        inappropriate        for
+ *      `__builtin_choose_expr`'s  expression  (which  must be  a  compile-time
+ *      integer constant  but the address  of ::rb_f_notimplement is  not fixed
+ *      until      the      linker).        Instead      we      are      using
+ *      `__builtin_types_compatible_p`, and in doing  so we need to distinguish
+ *      ::rb_f_notimplement from others, by type.
+ */
+#include "ruby/internal/attr/maybe_unused.h"
+#include "ruby/internal/attr/nonnull.h"
+#include "ruby/internal/attr/weakref.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/config.h"
+#include "ruby/internal/has/attribute.h"
+#include "ruby/internal/intern/class.h"
+#include "ruby/internal/intern/vm.h"
+#include "ruby/internal/method.h"
+#include "ruby/internal/value.h"
+#include "ruby/backward/2/stdarg.h"
+
+#if defined(__cplusplus)
+# include "ruby/backward/cxxanyargs.hpp"
+
+#elif defined(_WIN32) || defined(__CYGWIN__)
+# /* Skip due to [Bug #16134] */
+
+#elif ! RBIMPL_HAS_ATTRIBUTE(transparent_union)
+# /* :TODO: improve here, please find a way to support. */
+
+#elif ! defined(HAVE_VA_ARGS_MACRO)
+# /* :TODO: improve here, please find a way to support. */
+
+#else
+# /** @cond INTERNAL_MACRO */
+# if ! defined(HAVE_BUILTIN___BUILTIN_TYPES_COMPATIBLE_P)
+#  define RBIMPL_CFUNC_IS_rb_f_notimplement(f) 0
+# else
+#  define RBIMPL_CFUNC_IS_rb_f_notimplement(f) \
+    __builtin_types_compatible_p(             \
+        __typeof__(f),                        \
+        __typeof__(rb_f_notimplement))
+# endif
+
+# if ! defined(HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P)
+#  define RBIMPL_ANYARGS_DISPATCH(expr, truthy, falsy) (falsy)
+# else
+#  define RBIMPL_ANYARGS_DISPATCH(expr, truthy, falsy) \
+    __builtin_choose_expr(                            \
+        __builtin_choose_expr(                        \
+            __builtin_constant_p(expr),               \
+            (expr), 0),                               \
+        (truthy), (falsy))
+# endif
+
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_m2(n) RBIMPL_ANYARGS_DISPATCH((n) == -2, rb_define_singleton_method_m2, rb_define_singleton_method_m3)
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_m1(n) RBIMPL_ANYARGS_DISPATCH((n) == -1, rb_define_singleton_method_m1, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_m2(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_00(n) RBIMPL_ANYARGS_DISPATCH((n) ==  0, rb_define_singleton_method_00, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_m1(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_01(n) RBIMPL_ANYARGS_DISPATCH((n) ==  1, rb_define_singleton_method_01, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_00(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_02(n) RBIMPL_ANYARGS_DISPATCH((n) ==  2, rb_define_singleton_method_02, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_01(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_03(n) RBIMPL_ANYARGS_DISPATCH((n) ==  3, rb_define_singleton_method_03, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_02(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_04(n) RBIMPL_ANYARGS_DISPATCH((n) ==  4, rb_define_singleton_method_04, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_03(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_05(n) RBIMPL_ANYARGS_DISPATCH((n) ==  5, rb_define_singleton_method_05, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_04(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_06(n) RBIMPL_ANYARGS_DISPATCH((n) ==  6, rb_define_singleton_method_06, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_05(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_07(n) RBIMPL_ANYARGS_DISPATCH((n) ==  7, rb_define_singleton_method_07, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_06(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_08(n) RBIMPL_ANYARGS_DISPATCH((n) ==  8, rb_define_singleton_method_08, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_07(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_09(n) RBIMPL_ANYARGS_DISPATCH((n) ==  9, rb_define_singleton_method_09, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_08(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_10(n) RBIMPL_ANYARGS_DISPATCH((n) == 10, rb_define_singleton_method_10, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_09(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_11(n) RBIMPL_ANYARGS_DISPATCH((n) == 11, rb_define_singleton_method_11, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_10(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_12(n) RBIMPL_ANYARGS_DISPATCH((n) == 12, rb_define_singleton_method_12, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_11(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_13(n) RBIMPL_ANYARGS_DISPATCH((n) == 13, rb_define_singleton_method_13, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_12(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_14(n) RBIMPL_ANYARGS_DISPATCH((n) == 14, rb_define_singleton_method_14, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_13(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_15(n) RBIMPL_ANYARGS_DISPATCH((n) == 15, rb_define_singleton_method_15, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_14(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_m2(n) RBIMPL_ANYARGS_DISPATCH((n) == -2, rb_define_protected_method_m2, rb_define_protected_method_m3)
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_m1(n) RBIMPL_ANYARGS_DISPATCH((n) == -1, rb_define_protected_method_m1, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_m2(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_00(n) RBIMPL_ANYARGS_DISPATCH((n) ==  0, rb_define_protected_method_00, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_m1(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_01(n) RBIMPL_ANYARGS_DISPATCH((n) ==  1, rb_define_protected_method_01, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_00(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_02(n) RBIMPL_ANYARGS_DISPATCH((n) ==  2, rb_define_protected_method_02, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_01(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_03(n) RBIMPL_ANYARGS_DISPATCH((n) ==  3, rb_define_protected_method_03, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_02(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_04(n) RBIMPL_ANYARGS_DISPATCH((n) ==  4, rb_define_protected_method_04, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_03(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_05(n) RBIMPL_ANYARGS_DISPATCH((n) ==  5, rb_define_protected_method_05, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_04(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_06(n) RBIMPL_ANYARGS_DISPATCH((n) ==  6, rb_define_protected_method_06, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_05(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_07(n) RBIMPL_ANYARGS_DISPATCH((n) ==  7, rb_define_protected_method_07, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_06(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_08(n) RBIMPL_ANYARGS_DISPATCH((n) ==  8, rb_define_protected_method_08, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_07(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_09(n) RBIMPL_ANYARGS_DISPATCH((n) ==  9, rb_define_protected_method_09, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_08(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_10(n) RBIMPL_ANYARGS_DISPATCH((n) == 10, rb_define_protected_method_10, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_09(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_11(n) RBIMPL_ANYARGS_DISPATCH((n) == 11, rb_define_protected_method_11, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_10(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_12(n) RBIMPL_ANYARGS_DISPATCH((n) == 12, rb_define_protected_method_12, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_11(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_13(n) RBIMPL_ANYARGS_DISPATCH((n) == 13, rb_define_protected_method_13, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_12(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_14(n) RBIMPL_ANYARGS_DISPATCH((n) == 14, rb_define_protected_method_14, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_13(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_15(n) RBIMPL_ANYARGS_DISPATCH((n) == 15, rb_define_protected_method_15, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_14(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_m2(n)   RBIMPL_ANYARGS_DISPATCH((n) == -2, rb_define_private_method_m2,   rb_define_private_method_m3)
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_m1(n)   RBIMPL_ANYARGS_DISPATCH((n) == -1, rb_define_private_method_m1,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_m2(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_00(n)   RBIMPL_ANYARGS_DISPATCH((n) ==  0, rb_define_private_method_00,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_m1(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_01(n)   RBIMPL_ANYARGS_DISPATCH((n) ==  1, rb_define_private_method_01,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_00(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_02(n)   RBIMPL_ANYARGS_DISPATCH((n) ==  2, rb_define_private_method_02,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_01(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_03(n)   RBIMPL_ANYARGS_DISPATCH((n) ==  3, rb_define_private_method_03,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_02(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_04(n)   RBIMPL_ANYARGS_DISPATCH((n) ==  4, rb_define_private_method_04,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_03(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_05(n)   RBIMPL_ANYARGS_DISPATCH((n) ==  5, rb_define_private_method_05,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_04(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_06(n)   RBIMPL_ANYARGS_DISPATCH((n) ==  6, rb_define_private_method_06,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_05(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_07(n)   RBIMPL_ANYARGS_DISPATCH((n) ==  7, rb_define_private_method_07,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_06(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_08(n)   RBIMPL_ANYARGS_DISPATCH((n) ==  8, rb_define_private_method_08,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_07(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_09(n)   RBIMPL_ANYARGS_DISPATCH((n) ==  9, rb_define_private_method_09,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_08(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_10(n)   RBIMPL_ANYARGS_DISPATCH((n) == 10, rb_define_private_method_10,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_09(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_11(n)   RBIMPL_ANYARGS_DISPATCH((n) == 11, rb_define_private_method_11,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_10(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_12(n)   RBIMPL_ANYARGS_DISPATCH((n) == 12, rb_define_private_method_12,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_11(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_13(n)   RBIMPL_ANYARGS_DISPATCH((n) == 13, rb_define_private_method_13,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_12(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_14(n)   RBIMPL_ANYARGS_DISPATCH((n) == 14, rb_define_private_method_14,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_13(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_15(n)   RBIMPL_ANYARGS_DISPATCH((n) == 15, rb_define_private_method_15,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_14(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_m2(n)  RBIMPL_ANYARGS_DISPATCH((n) == -2, rb_define_module_function_m2,  rb_define_module_function_m3)
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_m1(n)  RBIMPL_ANYARGS_DISPATCH((n) == -1, rb_define_module_function_m1,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_m2(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_00(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  0, rb_define_module_function_00,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_m1(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_01(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  1, rb_define_module_function_01,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_00(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_02(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  2, rb_define_module_function_02,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_01(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_03(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  3, rb_define_module_function_03,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_02(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_04(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  4, rb_define_module_function_04,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_03(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_05(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  5, rb_define_module_function_05,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_04(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_06(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  6, rb_define_module_function_06,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_05(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_07(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  7, rb_define_module_function_07,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_06(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_08(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  8, rb_define_module_function_08,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_07(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_09(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  9, rb_define_module_function_09,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_08(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_10(n)  RBIMPL_ANYARGS_DISPATCH((n) == 10, rb_define_module_function_10,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_09(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_11(n)  RBIMPL_ANYARGS_DISPATCH((n) == 11, rb_define_module_function_11,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_10(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_12(n)  RBIMPL_ANYARGS_DISPATCH((n) == 12, rb_define_module_function_12,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_11(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_13(n)  RBIMPL_ANYARGS_DISPATCH((n) == 13, rb_define_module_function_13,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_12(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_14(n)  RBIMPL_ANYARGS_DISPATCH((n) == 14, rb_define_module_function_14,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_13(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_15(n)  RBIMPL_ANYARGS_DISPATCH((n) == 15, rb_define_module_function_15,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_14(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_m2(n)  RBIMPL_ANYARGS_DISPATCH((n) == -2, rb_define_global_function_m2,  rb_define_global_function_m3)
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_m1(n)  RBIMPL_ANYARGS_DISPATCH((n) == -1, rb_define_global_function_m1,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_m2(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_00(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  0, rb_define_global_function_00,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_m1(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_01(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  1, rb_define_global_function_01,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_00(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_02(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  2, rb_define_global_function_02,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_01(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_03(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  3, rb_define_global_function_03,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_02(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_04(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  4, rb_define_global_function_04,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_03(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_05(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  5, rb_define_global_function_05,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_04(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_06(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  6, rb_define_global_function_06,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_05(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_07(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  7, rb_define_global_function_07,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_06(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_08(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  8, rb_define_global_function_08,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_07(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_09(n)  RBIMPL_ANYARGS_DISPATCH((n) ==  9, rb_define_global_function_09,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_08(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_10(n)  RBIMPL_ANYARGS_DISPATCH((n) == 10, rb_define_global_function_10,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_09(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_11(n)  RBIMPL_ANYARGS_DISPATCH((n) == 11, rb_define_global_function_11,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_10(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_12(n)  RBIMPL_ANYARGS_DISPATCH((n) == 12, rb_define_global_function_12,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_11(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_13(n)  RBIMPL_ANYARGS_DISPATCH((n) == 13, rb_define_global_function_13,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_12(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_14(n)  RBIMPL_ANYARGS_DISPATCH((n) == 14, rb_define_global_function_14,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_13(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_15(n)  RBIMPL_ANYARGS_DISPATCH((n) == 15, rb_define_global_function_15,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_14(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_m2(n)        RBIMPL_ANYARGS_DISPATCH((n) == -2, rb_define_method_id_m2,        rb_define_method_id_m3)
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_m1(n)        RBIMPL_ANYARGS_DISPATCH((n) == -1, rb_define_method_id_m1,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_m2(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_00(n)        RBIMPL_ANYARGS_DISPATCH((n) ==  0, rb_define_method_id_00,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_m1(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_01(n)        RBIMPL_ANYARGS_DISPATCH((n) ==  1, rb_define_method_id_01,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_00(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_02(n)        RBIMPL_ANYARGS_DISPATCH((n) ==  2, rb_define_method_id_02,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_01(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_03(n)        RBIMPL_ANYARGS_DISPATCH((n) ==  3, rb_define_method_id_03,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_02(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_04(n)        RBIMPL_ANYARGS_DISPATCH((n) ==  4, rb_define_method_id_04,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_03(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_05(n)        RBIMPL_ANYARGS_DISPATCH((n) ==  5, rb_define_method_id_05,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_04(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_06(n)        RBIMPL_ANYARGS_DISPATCH((n) ==  6, rb_define_method_id_06,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_05(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_07(n)        RBIMPL_ANYARGS_DISPATCH((n) ==  7, rb_define_method_id_07,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_06(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_08(n)        RBIMPL_ANYARGS_DISPATCH((n) ==  8, rb_define_method_id_08,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_07(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_09(n)        RBIMPL_ANYARGS_DISPATCH((n) ==  9, rb_define_method_id_09,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_08(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_10(n)        RBIMPL_ANYARGS_DISPATCH((n) == 10, rb_define_method_id_10,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_09(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_11(n)        RBIMPL_ANYARGS_DISPATCH((n) == 11, rb_define_method_id_11,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_10(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_12(n)        RBIMPL_ANYARGS_DISPATCH((n) == 12, rb_define_method_id_12,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_11(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_13(n)        RBIMPL_ANYARGS_DISPATCH((n) == 13, rb_define_method_id_13,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_12(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_14(n)        RBIMPL_ANYARGS_DISPATCH((n) == 14, rb_define_method_id_14,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_13(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_15(n)        RBIMPL_ANYARGS_DISPATCH((n) == 15, rb_define_method_id_15,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_14(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_m2(n)           RBIMPL_ANYARGS_DISPATCH((n) == -2, rb_define_method_m2,           rb_define_method_m3)
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_m1(n)           RBIMPL_ANYARGS_DISPATCH((n) == -1, rb_define_method_m1,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_m2(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_00(n)           RBIMPL_ANYARGS_DISPATCH((n) ==  0, rb_define_method_00,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_m1(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_01(n)           RBIMPL_ANYARGS_DISPATCH((n) ==  1, rb_define_method_01,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_00(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_02(n)           RBIMPL_ANYARGS_DISPATCH((n) ==  2, rb_define_method_02,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_01(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_03(n)           RBIMPL_ANYARGS_DISPATCH((n) ==  3, rb_define_method_03,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_02(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_04(n)           RBIMPL_ANYARGS_DISPATCH((n) ==  4, rb_define_method_04,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_03(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_05(n)           RBIMPL_ANYARGS_DISPATCH((n) ==  5, rb_define_method_05,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_04(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_06(n)           RBIMPL_ANYARGS_DISPATCH((n) ==  6, rb_define_method_06,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_05(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_07(n)           RBIMPL_ANYARGS_DISPATCH((n) ==  7, rb_define_method_07,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_06(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_08(n)           RBIMPL_ANYARGS_DISPATCH((n) ==  8, rb_define_method_08,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_07(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_09(n)           RBIMPL_ANYARGS_DISPATCH((n) ==  9, rb_define_method_09,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_08(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_10(n)           RBIMPL_ANYARGS_DISPATCH((n) == 10, rb_define_method_10,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_09(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_11(n)           RBIMPL_ANYARGS_DISPATCH((n) == 11, rb_define_method_11,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_10(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_12(n)           RBIMPL_ANYARGS_DISPATCH((n) == 12, rb_define_method_12,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_11(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_13(n)           RBIMPL_ANYARGS_DISPATCH((n) == 13, rb_define_method_13,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_12(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_14(n)           RBIMPL_ANYARGS_DISPATCH((n) == 14, rb_define_method_14,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_13(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_15(n)           RBIMPL_ANYARGS_DISPATCH((n) == 15, rb_define_method_15,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_14(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method(n, f) RBIMPL_ANYARGS_DISPATCH(RBIMPL_CFUNC_IS_rb_f_notimplement(f), rb_define_singleton_method_notimpl, RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method_15(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method(n, f) RBIMPL_ANYARGS_DISPATCH(RBIMPL_CFUNC_IS_rb_f_notimplement(f), rb_define_protected_method_notimpl, RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method_15(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_private_method(n, f)   RBIMPL_ANYARGS_DISPATCH(RBIMPL_CFUNC_IS_rb_f_notimplement(f), rb_define_private_method_notimpl,   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method_15(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_module_function(n, f)  RBIMPL_ANYARGS_DISPATCH(RBIMPL_CFUNC_IS_rb_f_notimplement(f), rb_define_module_function_notimpl,  RBIMPL_ANYARGS_DISPATCH_rb_define_module_function_15(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_global_function(n, f)  RBIMPL_ANYARGS_DISPATCH(RBIMPL_CFUNC_IS_rb_f_notimplement(f), rb_define_global_function_notimpl,  RBIMPL_ANYARGS_DISPATCH_rb_define_global_function_15(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method_id(n, f)        RBIMPL_ANYARGS_DISPATCH(RBIMPL_CFUNC_IS_rb_f_notimplement(f), rb_define_method_id_notimpl,        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id_15(n))
+# define RBIMPL_ANYARGS_DISPATCH_rb_define_method(n, f)           RBIMPL_ANYARGS_DISPATCH(RBIMPL_CFUNC_IS_rb_f_notimplement(f), rb_define_method_notimpl,           RBIMPL_ANYARGS_DISPATCH_rb_define_method_15(n))
+# define RBIMPL_ANYARGS_ATTRSET(sym) RBIMPL_ATTR_MAYBE_UNUSED() RBIMPL_ATTR_NONNULL(()) RBIMPL_ATTR_WEAKREF(sym)
+# define RBIMPL_ANYARGS_DECL(sym, ...) \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _notimpl(__VA_ARGS__, VALUE(*)(int, const VALUE *, VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _m3(__VA_ARGS__, VALUE(*)(ANYARGS), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _m2(__VA_ARGS__, VALUE(*)(VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _m1(__VA_ARGS__, VALUE(*)(int, union { VALUE *x; const VALUE *y; } __attribute__((__transparent_union__)), VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _00(__VA_ARGS__, VALUE(*)(VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _01(__VA_ARGS__, VALUE(*)(VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _02(__VA_ARGS__, VALUE(*)(VALUE, VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _03(__VA_ARGS__, VALUE(*)(VALUE, VALUE, VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _04(__VA_ARGS__, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _05(__VA_ARGS__, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _06(__VA_ARGS__, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _07(__VA_ARGS__, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _08(__VA_ARGS__, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _09(__VA_ARGS__, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _10(__VA_ARGS__, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _11(__VA_ARGS__, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _12(__VA_ARGS__, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _13(__VA_ARGS__, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _14(__VA_ARGS__, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE), int); \
+RBIMPL_ANYARGS_ATTRSET(sym) static void sym ## _15(__VA_ARGS__, VALUE(*)(VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE, VALUE), int);
+RBIMPL_ANYARGS_DECL(rb_define_singleton_method, VALUE, const char *)
+RBIMPL_ANYARGS_DECL(rb_define_protected_method, VALUE, const char *)
+RBIMPL_ANYARGS_DECL(rb_define_private_method, VALUE, const char *)
+RBIMPL_ANYARGS_DECL(rb_define_module_function, VALUE, const char *)
+RBIMPL_ANYARGS_DECL(rb_define_global_function, const char *)
+RBIMPL_ANYARGS_DECL(rb_define_method_id, VALUE, ID)
+RBIMPL_ANYARGS_DECL(rb_define_method, VALUE, const char *)
+/** @endcond */
+
+/**
+ * @brief  Defines klass\#mid.
+ * @see    ::rb_define_method
+ * @param  klass  Where the method lives.
+ * @param  mid    Name of the defining method.
+ * @param  func   Implementation of klass\#mid.
+ * @param  arity  Arity of klass\#mid.
+ */
+#define rb_define_method(klass, mid, func, arity)           RBIMPL_ANYARGS_DISPATCH_rb_define_method((arity), (func))((klass), (mid), (func), (arity))
+
+/**
+ * @brief  Defines klass\#mid.
+ * @see    ::rb_define_method_id
+ * @param  klass  Where the method lives.
+ * @param  mid    Name of the defining method.
+ * @param  func   Implementation of klass\#mid.
+ * @param  arity  Arity of klass\#mid.
+ */
+#define rb_define_method_id(klass, mid, func, arity)        RBIMPL_ANYARGS_DISPATCH_rb_define_method_id((arity), (func))((klass), (mid), (func), (arity))
+
+/**
+ * @brief  Defines obj.mid.
+ * @see    ::rb_define_singleton_method
+ * @param  obj    Where the method lives.
+ * @param  mid    Name of the defining method.
+ * @param  func   Implementation of obj.mid.
+ * @param  arity  Arity of obj.mid.
+ */
+#define rb_define_singleton_method(obj, mid, func, arity)   RBIMPL_ANYARGS_DISPATCH_rb_define_singleton_method((arity), (func))((obj), (mid), (func), (arity))
+
+/**
+ * @brief  Defines klass\#mid and make it protected.
+ * @see    ::rb_define_protected_method
+ * @param  klass  Where the method lives.
+ * @param  mid    Name of the defining method.
+ * @param  func   Implementation of klass\#mid.
+ * @param  arity  Arity of klass\#mid.
+ */
+#define rb_define_protected_method(klass, mid, func, arity) RBIMPL_ANYARGS_DISPATCH_rb_define_protected_method((arity), (func))((klass), (mid), (func), (arity))
+
+/**
+ * @brief  Defines klass\#mid and make it private.
+ * @see    ::rb_define_private_method
+ * @param  klass  Where the method lives.
+ * @param  mid    Name of the defining method.
+ * @param  func   Implementation of klass\#mid.
+ * @param  arity  Arity of klass\#mid.
+ */
+#define rb_define_private_method(klass, mid, func, arity)   RBIMPL_ANYARGS_DISPATCH_rb_define_private_method((arity), (func))((klass), (mid), (func), (arity))
+
+/**
+ * @brief  Defines mod\#mid and make it a module function.
+ * @see    ::rb_define_module_function
+ * @param  mod    Where the method lives.
+ * @param  mid    Name of the defining method.
+ * @param  func   Implementation of mod\#mid.
+ * @param  arity  Arity of mod\#mid.
+ */
+#define rb_define_module_function(mod, mid, func, arity)    RBIMPL_ANYARGS_DISPATCH_rb_define_module_function((arity), (func))((mod), (mid), (func), (arity))
+
+/**
+ * @brief  Defines ::rb_mKerbel \#mid.
+ * @see    ::rb_define_global_function
+ * @param  mid    Name of the defining method.
+ * @param  func   Implementation of ::rb_mKernel \#mid.
+ * @param  arity  Arity of ::rb_mKernel \#mid.
+ */
+#define rb_define_global_function(mid, func, arity)         RBIMPL_ANYARGS_DISPATCH_rb_define_global_function((arity), (func))((mid), (func), (arity))
+
+#endif /* __cplusplus */
+
+/**
+ * This  macro is  to properly  cast  a function  parameter of  *_define_method
+ * family.  It  has been  around since  1.x era so  you can  maximise backwards
+ * compatibility by using it.
+ *
+ * ```CXX
+ * rb_define_method(klass, "method", RUBY_METHOD_FUNC(func), arity);
+ * ```
+ *
+ * @param  func  A pointer to a function that implements a method.
+ */
+#if ! defined(RUBY_DEVEL)
+# define RUBY_METHOD_FUNC(func) RBIMPL_CAST((VALUE (*)(ANYARGS))(func))
+
+#elif ! RUBY_DEVEL
+# define RUBY_METHOD_FUNC(func) RBIMPL_CAST((VALUE (*)(ANYARGS))(func))
+
+#elif ! defined(rb_define_method)
+# define RUBY_METHOD_FUNC(func) RBIMPL_CAST((VALUE (*)(ANYARGS))(func))
+
+#else
+# define RUBY_METHOD_FUNC(func) (func)
+
+#endif
+
+#endif /* RBIMPL_ANYARGS_H */

libs/libruby/ruby/internal/arithmetic.h

@@ -0,0 +1,39 @@
+#ifndef RBIMPL_ARITHMETIC_H                          /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Conversion  between  C's arithmetic  types  and  Ruby's  numeric
+ *             types.
+ */
+#include "ruby/internal/arithmetic/char.h"
+#include "ruby/internal/arithmetic/double.h"
+#include "ruby/internal/arithmetic/fixnum.h"
+#include "ruby/internal/arithmetic/gid_t.h"
+#include "ruby/internal/arithmetic/int.h"
+#include "ruby/internal/arithmetic/intptr_t.h"
+#include "ruby/internal/arithmetic/long.h"
+#include "ruby/internal/arithmetic/long_long.h"
+#include "ruby/internal/arithmetic/mode_t.h"
+#include "ruby/internal/arithmetic/off_t.h"
+#include "ruby/internal/arithmetic/pid_t.h"
+#include "ruby/internal/arithmetic/short.h"
+#include "ruby/internal/arithmetic/size_t.h"
+#include "ruby/internal/arithmetic/st_data_t.h"
+#include "ruby/internal/arithmetic/uid_t.h"
+#endif /* RBIMPL_ARITHMETIC_H */

libs/libruby/ruby/internal/arithmetic/char.h

@@ -0,0 +1,81 @@
+#ifndef RBIMPL_ARITHMETIC_CHAR_H                     /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_CHAR_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Arithmetic conversion between C's `char` and Ruby's.
+ */
+#include "ruby/internal/arithmetic/int.h"  /* NUM2INT is here, but */
+#include "ruby/internal/arithmetic/long.h" /* INT2FIX is here.*/
+#include "ruby/internal/attr/artificial.h"
+#include "ruby/internal/attr/const.h"
+#include "ruby/internal/attr/constexpr.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/core/rstring.h"
+#include "ruby/internal/value_type.h"
+
+#define RB_NUM2CHR rb_num2char_inline /**< @alias{rb_num2char_inline} */
+#define NUM2CHR    RB_NUM2CHR         /**< @old{RB_NUM2CHR} */
+#define CHR2FIX    RB_CHR2FIX         /**< @old{RB_CHR2FIX} */
+
+/** @cond INTERNAL_MACRO */
+#define RB_CHR2FIX RB_CHR2FIX
+/** @endcond */
+
+RBIMPL_ATTR_CONST_UNLESS_DEBUG()
+RBIMPL_ATTR_CONSTEXPR_UNLESS_DEBUG(CXX14)
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Converts a C's `unsigned char` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  c  Arbitrary `unsigned char` value.
+ * @return     An instance of ::rb_cInteger.
+ *
+ * @internal
+ *
+ * Nobody explicitly states this but in  Ruby, a char means an unsigned integer
+ * value of  range 0..255.   This is  a general principle.   AFAIK there  is no
+ * single line of code where char is signed.
+ */
+static inline VALUE
+RB_CHR2FIX(unsigned char c)
+{
+    return RB_INT2FIX(c);
+}
+
+/**
+ * Converts an instance of ::rb_cNumeric into  C's `char`.  At the same time it
+ * accepts a String of more than one character, and returns its first byte.  In
+ * the  early days  there  was a  Ruby level  "character"  literal `?c`,  which
+ * roughly worked this way.
+ *
+ * @param[in]  x               Either a string or a numeric.
+ * @exception  rb_eTypeError   `x` is not a numeric.
+ * @exception  rb_eRangeError  `x` is out of range of `unsigned int`.
+ * @return     The passed value converted into C's `char`.
+ */
+static inline char
+rb_num2char_inline(VALUE x)
+{
+    if (RB_TYPE_P(x, RUBY_T_STRING) && (RSTRING_LEN(x)>=1))
+        return RSTRING_PTR(x)[0];
+    else
+        return RBIMPL_CAST((char)RB_NUM2INT(x));
+}
+
+#endif /* RBIMPL_ARITHMETIC_CHAR_H */

libs/libruby/ruby/internal/arithmetic/double.h

@@ -0,0 +1,72 @@
+#ifndef RBIMPL_ARITHMETIC_DOUBLE_H                   /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_DOUBLE_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Arithmetic conversion between C's `double` and Ruby's.
+ */
+#include "ruby/internal/attr/pure.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/value.h"
+
+#define NUM2DBL      rb_num2dbl       /**< @old{rb_num2dbl} */
+#define RFLOAT_VALUE rb_float_value   /**< @old{rb_float_value} */
+#define DBL2NUM      rb_float_new     /**< @old{rb_float_new} */
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+/**
+ * Converts an instance of ::rb_cNumeric into C's `double`.
+ *
+ * @param[in]  num             Something numeric.
+ * @exception  rb_eTypeError   `num` is not a numeric.
+ * @return     The passed value converted into C's `double`.
+ */
+double rb_num2dbl(VALUE num);
+
+RBIMPL_ATTR_PURE()
+/**
+ * Extracts its double value from an instance of ::rb_cFloat.
+ *
+ * @param[in]  num  An instance of ::rb_cFloat.
+ * @pre        Must not pass anything other than a Fixnum.
+ * @return     The passed value converted into C's `double`.
+ */
+double rb_float_value(VALUE num);
+
+/**
+ * Converts a C's `double` into an instance of ::rb_cFloat.
+ *
+ * @param[in]  d  Arbitrary `double` value.
+ * @return     An instance of ::rb_cFloat.
+ */
+VALUE rb_float_new(double d);
+
+/**
+ * Identical to rb_float_new(), except it does not generate Flonums.
+ *
+ * @param[in]  d  Arbitrary `double` value.
+ * @return     An instance of ::rb_cFloat.
+ *
+ * @internal
+ *
+ * @shyouhei has no idea why it is here.
+ */
+VALUE rb_float_new_in_heap(double d);
+RBIMPL_SYMBOL_EXPORT_END()
+
+#endif /* RBIMPL_ARITHMETIC_DOUBLE_H */

libs/libruby/ruby/internal/arithmetic/fixnum.h

@@ -0,0 +1,60 @@
+#ifndef RBIMPL_ARITHMETIC_FIXNUM_H                   /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_FIXNUM_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Handling of integers formerly known as Fixnums.
+ */
+#include "ruby/backward/2/limits.h"
+
+#define FIXABLE    RB_FIXABLE      /**< @old{RB_FIXABLE} */
+#define FIXNUM_MAX RUBY_FIXNUM_MAX /**< @old{RUBY_FIXNUM_MAX} */
+#define FIXNUM_MIN RUBY_FIXNUM_MIN /**< @old{RUBY_FIXNUM_MIN} */
+#define NEGFIXABLE RB_NEGFIXABLE   /**< @old{RB_NEGFIXABLE} */
+#define POSFIXABLE RB_POSFIXABLE   /**< @old{RB_POSFIXABLE} */
+
+/**
+ * Checks if the passed value is in  range of fixnum, assuming it is a positive
+ * number.  Can sometimes be useful for C's unsigned integer types.
+ *
+ * @internal
+ *
+ * FIXABLE can be applied to anything, from double to intmax_t.  The problem is
+ * double.   On a  64bit system  RUBY_FIXNUM_MAX is  4,611,686,018,427,387,903,
+ * which is not representable by a double.  The nearest value that a double can
+ * represent  is   4,611,686,018,427,387,904,  which   is  not   fixable.   The
+ * seemingly-strange "< FIXNUM_MAX + 1" expression below is due to this.
+ */
+#define RB_POSFIXABLE(_) ((_) <  RUBY_FIXNUM_MAX + 1)
+
+/**
+ * Checks if the passed value is in  range of fixnum, assuming it is a negative
+ * number.  This is an implementation of #RB_FIXABLE.  Rarely used stand alone.
+ */
+#define RB_NEGFIXABLE(_) ((_) >= RUBY_FIXNUM_MIN)
+
+/** Checks if the passed value is in  range of fixnum */
+#define RB_FIXABLE(_)    (RB_POSFIXABLE(_) && RB_NEGFIXABLE(_))
+
+/** Maximum possible value that a fixnum can represent. */
+#define RUBY_FIXNUM_MAX  (LONG_MAX / 2)
+
+/** Minimum possible value that a fixnum can represent. */
+#define RUBY_FIXNUM_MIN  (LONG_MIN / 2)
+
+#endif /* RBIMPL_ARITHMETIC_FIXNUM_H */

libs/libruby/ruby/internal/arithmetic/gid_t.h

@@ -0,0 +1,41 @@
+#ifndef RBIMPL_ARITHMETIC_GID_T_H                    /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_GID_T_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Arithmetic conversion between C's `gid_t` and Ruby's.
+ */
+#include "ruby/internal/config.h"
+#include "ruby/internal/arithmetic/long.h"
+
+/** Converts a C's `gid_t` into an instance of ::rb_cInteger. */
+#ifndef GIDT2NUM
+# define GIDT2NUM RB_LONG2NUM
+#endif
+
+/** Converts an instance of ::rb_cNumeric into C's `gid_t`. */
+#ifndef NUM2GIDT
+# define NUM2GIDT RB_NUM2LONG
+#endif
+
+/** A rb_sprintf() format prefix to be used for a `gid_t` parameter. */
+#ifndef PRI_GIDT_PREFIX
+# define PRI_GIDT_PREFIX PRI_LONG_PREFIX
+#endif
+
+#endif /* RBIMPL_ARITHMETIC_GID_T_H */

libs/libruby/ruby/internal/arithmetic/int.h

@@ -0,0 +1,264 @@
+#ifndef RBIMPL_ARITHMETIC_INT_H                      /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_INT_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Arithmetic conversion between C's `int` and Ruby's.
+ */
+#include "ruby/internal/config.h"
+#include "ruby/internal/arithmetic/fixnum.h"
+#include "ruby/internal/arithmetic/intptr_t.h"
+#include "ruby/internal/arithmetic/long.h"
+#include "ruby/internal/attr/artificial.h"
+#include "ruby/internal/attr/const.h"
+#include "ruby/internal/attr/constexpr.h"
+#include "ruby/internal/compiler_is.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/special_consts.h"
+#include "ruby/internal/value.h"
+#include "ruby/internal/warning_push.h"
+#include "ruby/assert.h"
+
+#define RB_INT2NUM  rb_int2num_inline  /**< @alias{rb_int2num_inline} */
+#define RB_NUM2INT  rb_num2int_inline  /**< @alias{rb_num2int_inline} */
+#define RB_UINT2NUM rb_uint2num_inline /**< @alias{rb_uint2num_inline} */
+
+#define FIX2INT    RB_FIX2INT          /**< @old{RB_FIX2INT} */
+#define FIX2UINT   RB_FIX2UINT         /**< @old{RB_FIX2UINT} */
+#define INT2NUM    RB_INT2NUM          /**< @old{RB_INT2NUM} */
+#define NUM2INT    RB_NUM2INT          /**< @old{RB_NUM2INT} */
+#define NUM2UINT   RB_NUM2UINT         /**< @old{RB_NUM2UINT} */
+#define UINT2NUM   RB_UINT2NUM         /**< @old{RB_UINT2NUM} */
+
+/** @cond INTERNAL_MACRO */
+#define RB_FIX2INT  RB_FIX2INT
+#define RB_NUM2UINT RB_NUM2UINT
+#define RB_FIX2UINT RB_FIX2UINT
+/** @endcond */
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+
+/**
+ * Converts an instance of ::rb_cNumeric into C's `long`.
+ *
+ * @param[in]  num             Something numeric.
+ * @exception  rb_eTypeError   `num` is not a numeric.
+ * @exception  rb_eRangeError  `num` is out of range of `int`.
+ * @return     The passed value converted into C's `long`.
+ *
+ * @internal
+ *
+ * Yes, the  API is  really strange.   It returns `long`,  but raises  when the
+ * value is out of `int`.  This seems to  be due to the fact that Matz favoured
+ * K&R before, and his machine at that moment was an ILP32 architecture.
+ */
+long rb_num2int(VALUE num);
+
+/**
+ * Identical to rb_num2int().
+ *
+ * @param[in]  num             Something numeric.
+ * @exception  rb_eTypeError   `num` is not a numeric.
+ * @exception  rb_eRangeError  `num` is out of range of `int`.
+ * @return     The passed value converted into C's `long`.
+ *
+ * @internal
+ *
+ * This function seems to be a complete  waste of disk space.  @shyouhei has no
+ * idea why this is a different thing from rb_num2short().
+ */
+long rb_fix2int(VALUE num);
+
+/**
+ * Converts an instance of ::rb_cNumeric into C's `unsigned long`.
+ *
+ * @param[in]  num             Something numeric.
+ * @exception  rb_eTypeError   `num` is not a numeric.
+ * @exception  rb_eRangeError  `num` is out of range of `unsigned int`.
+ * @return     The passed value converted into C's `unsigned long`.
+ *
+ * @internal
+ *
+ * Yes, the API is really strange.  It returns `unsigned long`, but raises when
+ * the value is out  of `unsigned int`.  This seems to be due  to the fact that
+ * Matz  favoured K&R  before, and  his  machine at  that moment  was an  ILP32
+ * architecture.
+ */
+unsigned long rb_num2uint(VALUE num);
+
+/**
+ * Identical to rb_num2uint().
+ *
+ * @param[in]  num             Something numeric.
+ * @exception  rb_eTypeError   `num` is not a numeric.
+ * @exception  rb_eRangeError  `num` is out of range of `unsigned int`.
+ * @return     The passed value converted into C's `unsigned long`.
+ *
+ * @internal
+ *
+ * This function seems to be a complete  waste of disk space.  @shyouhei has no
+ * idea why this is a different thing from rb_num2short().
+ */
+unsigned long rb_fix2uint(VALUE num);
+RBIMPL_SYMBOL_EXPORT_END()
+
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Converts a Fixnum into C's `int`.
+ *
+ * @param[in]  x  Some Fixnum.
+ * @pre        Must not pass anything other than a Fixnum.
+ * @return     The passed value converted into C's `int`.
+ */
+static inline int
+RB_FIX2INT(VALUE x)
+{
+    /* "FIX2INT raises a  TypeError if passed nil", says rubyspec.  Not sure if
+     * that is a desired behaviour but just preserve backwards compatilibily.
+     */
+#if 0
+    RBIMPL_ASSERT_OR_ASSUME(RB_FIXNUM_P(x));
+#endif
+    long ret;
+
+    if /* constexpr */ (sizeof(int) < sizeof(long)) {
+        ret = rb_fix2int(x);
+    }
+    else {
+        ret = RB_FIX2LONG(x);
+    }
+
+    return RBIMPL_CAST((int)ret);
+}
+
+/**
+ * Converts an instance of ::rb_cNumeric into C's `int`.
+ *
+ * @param[in]  x               Something numeric.
+ * @exception  rb_eTypeError   `x` is not a numeric.
+ * @exception  rb_eRangeError  `x` is out of range of `int`.
+ * @return     The passed value converted into C's `int`.
+ */
+static inline int
+rb_num2int_inline(VALUE x)
+{
+    long ret;
+
+    if /* constexpr */ (sizeof(int) == sizeof(long)) {
+        ret = RB_NUM2LONG(x);
+    }
+    else if (RB_FIXNUM_P(x)) {
+        ret = rb_fix2int(x);
+    }
+    else {
+        ret = rb_num2int(x);
+    }
+
+    return RBIMPL_CAST((int)ret);
+}
+
+/**
+ * Converts an instance of ::rb_cNumeric into C's `unsigned int`.
+ *
+ * @param[in]  x               Something numeric.
+ * @exception  rb_eTypeError   `x` is not a numeric.
+ * @exception  rb_eRangeError  `x` is out of range of `unsigned int`.
+ * @return     The passed value converted into C's `unsigned int`.
+ */
+RBIMPL_ATTR_ARTIFICIAL()
+static inline unsigned int
+RB_NUM2UINT(VALUE x)
+{
+    unsigned long ret;
+
+    if /* constexpr */ (sizeof(int) < sizeof(long)) {
+        ret = rb_num2uint(x);
+    }
+    else {
+        ret = RB_NUM2ULONG(x);
+    }
+
+    return RBIMPL_CAST((unsigned int)ret);
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Converts a Fixnum into C's `int`.
+ *
+ * @param[in]  x  Some Fixnum.
+ * @pre        Must not pass anything other than a Fixnum.
+ * @return     The passed value converted into C's `int`.
+ */
+static inline unsigned int
+RB_FIX2UINT(VALUE x)
+{
+#if 0 /* Ditto for RB_FIX2INT. */
+    RBIMPL_ASSERT_OR_ASSUME(RB_FIXNUM_P(x));
+#endif
+    unsigned long ret;
+
+    if /* constexpr */ (sizeof(int) < sizeof(long)) {
+        ret = rb_fix2uint(x);
+    }
+    else {
+        ret = RB_FIX2ULONG(x);
+    }
+
+    return RBIMPL_CAST((unsigned int)ret);
+}
+
+RBIMPL_WARNING_PUSH()
+#if RBIMPL_COMPILER_IS(GCC)
+RBIMPL_WARNING_IGNORED(-Wtype-limits) /* We can ignore them here. */
+#elif RBIMPL_HAS_WARNING("-Wtautological-constant-out-of-range-compare")
+RBIMPL_WARNING_IGNORED(-Wtautological-constant-out-of-range-compare)
+#endif
+
+/**
+ * Converts a C's `int` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  v  Arbitrary `int` value.
+ * @return     An instance of ::rb_cInteger.
+ */
+static inline VALUE
+rb_int2num_inline(int v)
+{
+    if (RB_FIXABLE(v))
+        return RB_INT2FIX(v);
+    else
+        return rb_int2big(v);
+}
+
+/**
+ * Converts a C's `unsigned int` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  v  Arbitrary `unsigned int` value.
+ * @return     An instance of ::rb_cInteger.
+ */
+static inline VALUE
+rb_uint2num_inline(unsigned int v)
+{
+    if (RB_POSFIXABLE(v))
+        return RB_LONG2FIX(v);
+    else
+        return rb_uint2big(v);
+}
+
+RBIMPL_WARNING_POP()
+
+#endif /* RBIMPL_ARITHMETIC_INT_H */

libs/libruby/ruby/internal/arithmetic/intptr_t.h

@@ -0,0 +1,74 @@
+#ifndef RBIMPL_ARITHMETIC_INTPTR_T_H                 /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_INTPTR_T_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Arithmetic conversion between C's `intptr_t` and Ruby's.
+ */
+#include "ruby/internal/config.h"
+
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+
+#include "ruby/internal/value.h"
+#include "ruby/internal/dllexport.h"
+
+#define rb_int_new  rb_int2inum  /**< @alias{rb_int2inum} */
+#define rb_uint_new rb_uint2inum /**< @alias{rb_uint2inum} */
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+
+/**
+ * Converts a C's `intptr_t` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  i  Arbitrary `intptr_t` value.
+ * @return     An instance of ::rb_cInteger.
+ * @note       This function always allocates Bignums, even if the given number
+ *             is small enough to fit into a Fixnum.
+ */
+VALUE rb_int2big(intptr_t i);
+
+/**
+ * Converts a C's `intptr_t` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  i  Arbitrary `intptr_t` value.
+ * @return     An instance of ::rb_cInteger.
+ */
+VALUE rb_int2inum(intptr_t i);
+
+/**
+ * Converts a C's `intptr_t` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  i  Arbitrary `intptr_t` value.
+ * @return     An instance of ::rb_cInteger.
+ * @note       This function always allocates Bignums, even if the given number
+ *             is small enough to fit into a Fixnum.
+ */
+VALUE rb_uint2big(uintptr_t i);
+
+/**
+ * Converts a C's `uintptr_t` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  i  Arbitrary `uintptr_t` value.
+ * @return     An instance of ::rb_cInteger.
+ */
+VALUE rb_uint2inum(uintptr_t i);
+RBIMPL_SYMBOL_EXPORT_END()
+
+#endif /* RBIMPL_ARITHMETIC_INTPTR_T_H */

libs/libruby/ruby/internal/arithmetic/long.h

@@ -0,0 +1,356 @@
+#ifndef RBIMPL_ARITHMETIC_LONG_H                     /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_LONG_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Arithmetic conversion between C's `long` and Ruby's.
+ *
+ * ### Q&A ###
+ *
+ * - Q: Why are INT2FIX etc. here, not in `int.h`?
+ *
+ * - A: Because they  are in fact  handling `long`.   It seems someone  did not
+ *      understand the difference of `int`  and `long` when they designed those
+ *      macros.
+ */
+#include "ruby/internal/config.h"
+#include "ruby/internal/arithmetic/fixnum.h"   /* FIXABLE */
+#include "ruby/internal/arithmetic/intptr_t.h" /* rb_int2big etc.*/
+#include "ruby/internal/assume.h"
+#include "ruby/internal/attr/artificial.h"
+#include "ruby/internal/attr/cold.h"
+#include "ruby/internal/attr/const.h"
+#include "ruby/internal/attr/constexpr.h"
+#include "ruby/internal/attr/noreturn.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/special_consts.h"      /* FIXNUM_FLAG */
+#include "ruby/internal/value.h"
+#include "ruby/assert.h"
+
+#define FIX2LONG     RB_FIX2LONG          /**< @old{RB_FIX2LONG} */
+#define FIX2ULONG    RB_FIX2ULONG         /**< @old{RB_FIX2ULONG} */
+#define INT2FIX      RB_INT2FIX           /**< @old{RB_INT2FIX} */
+#define LONG2FIX     RB_INT2FIX           /**< @old{RB_INT2FIX} */
+#define LONG2NUM     RB_LONG2NUM          /**< @old{RB_LONG2NUM} */
+#define NUM2LONG     RB_NUM2LONG          /**< @old{RB_NUM2LONG} */
+#define NUM2ULONG    RB_NUM2ULONG         /**< @old{RB_NUM2ULONG} */
+#define RB_FIX2LONG  rb_fix2long          /**< @alias{rb_fix2long} */
+#define RB_FIX2ULONG rb_fix2ulong         /**< @alias{rb_fix2ulong} */
+#define RB_LONG2FIX  RB_INT2FIX           /**< @alias{RB_INT2FIX} */
+#define RB_LONG2NUM  rb_long2num_inline   /**< @alias{rb_long2num_inline} */
+#define RB_NUM2LONG  rb_num2long_inline   /**< @alias{rb_num2long_inline} */
+#define RB_NUM2ULONG rb_num2ulong_inline  /**< @alias{rb_num2ulong_inline} */
+#define RB_ULONG2NUM rb_ulong2num_inline  /**< @alias{rb_ulong2num_inline} */
+#define ULONG2NUM    RB_ULONG2NUM         /**< @old{RB_ULONG2NUM} */
+#define rb_fix_new   RB_INT2FIX           /**< @alias{RB_INT2FIX} */
+#define rb_long2int  rb_long2int_inline   /**< @alias{rb_long2int_inline} */
+
+/** @cond INTERNAL_MACRO */
+#define RB_INT2FIX RB_INT2FIX
+/** @endcond */
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+
+RBIMPL_ATTR_NORETURN()
+RBIMPL_ATTR_COLD()
+/**
+ * This is an utility function to raise an ::rb_eRangeError.
+ *
+ * @param[in]  num             A signed value about to overflow.
+ * @exception  rb_eRangeError  `num` is out of range of `int`.
+ */
+void rb_out_of_int(SIGNED_VALUE num);
+
+/**
+ * Converts an instance of ::rb_cNumeric into C's `long`.
+ *
+ * @param[in]  num             Something numeric.
+ * @exception  rb_eTypeError   `num` is not a numeric.
+ * @exception  rb_eRangeError  `num` is out of range of `long`.
+ * @return     The passed value converted into C's `long`.
+ */
+long rb_num2long(VALUE num);
+
+/**
+ * Converts an instance of ::rb_cNumeric into C's `unsigned long`.
+ *
+ * @param[in]  num             Something numeric.
+ * @exception  rb_eTypeError   `num` is not a numeric.
+ * @exception  rb_eRangeError  `num` is out of range of `unsigned long`.
+ * @return     The passed value converted into C's `unsigned long`.
+ */
+unsigned long rb_num2ulong(VALUE num);
+RBIMPL_SYMBOL_EXPORT_END()
+
+RBIMPL_ATTR_CONST_UNLESS_DEBUG()
+RBIMPL_ATTR_CONSTEXPR_UNLESS_DEBUG(CXX14)
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Converts a C's `long` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  i  Arbitrary `long` value.
+ * @return     An instance of ::rb_cInteger.
+ */
+static inline VALUE
+RB_INT2FIX(long i)
+{
+    RBIMPL_ASSERT_OR_ASSUME(RB_FIXABLE(i));
+
+    /* :NOTE: VALUE can be wider than long.  As j being unsigned, 2j+1 is fully
+     * defined. Also it can be compiled into a single LEA instruction. */
+    const unsigned long j = i;
+    const unsigned long k = (j << 1) + RUBY_FIXNUM_FLAG;
+    const long          l = k;
+    const SIGNED_VALUE  m = l; /* Sign extend */
+    const VALUE         n = m;
+
+    RBIMPL_ASSERT_OR_ASSUME(RB_FIXNUM_P(n));
+    return n;
+}
+
+/**
+ * Checks if `int` can hold the given integer.
+ *
+ * @param[in]  n               Arbitrary `long` value.
+ * @exception  rb_eRangeError  `n` is out of range of `int`.
+ * @return     Identical value of type `int`
+ */
+static inline int
+rb_long2int_inline(long n)
+{
+    int i = RBIMPL_CAST((int)n);
+
+    if /* constexpr */ (sizeof(long) <= sizeof(int)) {
+        RBIMPL_ASSUME(i == n);
+    }
+
+    if (i != n)
+        rb_out_of_int(n);
+
+    return i;
+}
+
+RBIMPL_ATTR_CONST_UNLESS_DEBUG()
+RBIMPL_ATTR_CONSTEXPR_UNLESS_DEBUG(CXX14)
+/**
+ * @private
+ *
+ * This  is an  implementation detail  of rb_fix2long().   People don't  use it
+ * directly.
+ *
+ * @param[in]  x  A Fixnum.
+ * @return     Identical value of type `long`
+ * @pre        Must not pass anything other than a Fixnum.
+ */
+static inline long
+rbimpl_fix2long_by_idiv(VALUE x)
+{
+    RBIMPL_ASSERT_OR_ASSUME(RB_FIXNUM_P(x));
+
+    /* :NOTE: VALUE  can be wider  than long.  (x-1)/2 never  overflows because
+     * RB_FIXNUM_P(x)  holds.   Also it  has  no  portability issue  like  y>>1
+     * below. */
+    const SIGNED_VALUE y = x - RUBY_FIXNUM_FLAG;
+    const SIGNED_VALUE z = y / 2;
+    const long         w = RBIMPL_CAST((long)z);
+
+    RBIMPL_ASSERT_OR_ASSUME(RB_FIXABLE(w));
+    return w;
+}
+
+RBIMPL_ATTR_CONST_UNLESS_DEBUG()
+RBIMPL_ATTR_CONSTEXPR_UNLESS_DEBUG(CXX14)
+/**
+ * @private
+ *
+ * This  is an  implementation detail  of rb_fix2long().   People don't  use it
+ * directly.
+ *
+ * @param[in]  x  A Fixnum.
+ * @return     Identical value of type `long`
+ * @pre        Must not pass anything other than a Fixnum.
+ */
+static inline long
+rbimpl_fix2long_by_shift(VALUE x)
+{
+    RBIMPL_ASSERT_OR_ASSUME(RB_FIXNUM_P(x));
+
+    /* :NOTE: VALUE can be wider than long.  If right shift is arithmetic, this
+     * is noticeably faster than above. */
+    const SIGNED_VALUE y = x;
+    const SIGNED_VALUE z = y >> 1;
+    const long         w = RBIMPL_CAST((long)z);
+
+    RBIMPL_ASSERT_OR_ASSUME(RB_FIXABLE(w));
+    return w;
+}
+
+RBIMPL_ATTR_CONST()
+RBIMPL_ATTR_CONSTEXPR(CXX11)
+/**
+ * @private
+ *
+ * This  is an  implementation detail  of rb_fix2long().   People don't  use it
+ * directly.
+ *
+ * @retval  true   This C compiler's right shift operator is arithmetic.
+ * @retval  false  This C compiler's right shift operator is logical.
+ */
+static inline bool
+rbimpl_right_shift_is_arithmetic_p(void)
+{
+    return (-1 >> 1) == -1;
+}
+
+RBIMPL_ATTR_CONST_UNLESS_DEBUG()
+RBIMPL_ATTR_CONSTEXPR_UNLESS_DEBUG(CXX14)
+/**
+ * Converts a Fixnum into C's `long`.
+ *
+ * @param[in]  x  Some Fixnum.
+ * @pre        Must not pass anything other than a Fixnum.
+ * @return     The passed value converted into C's `long`.
+ */
+static inline long
+rb_fix2long(VALUE x)
+{
+    if /* constexpr */ (rbimpl_right_shift_is_arithmetic_p()) {
+        return rbimpl_fix2long_by_shift(x);
+    }
+    else {
+        return rbimpl_fix2long_by_idiv(x);
+    }
+}
+
+RBIMPL_ATTR_CONST_UNLESS_DEBUG()
+RBIMPL_ATTR_CONSTEXPR_UNLESS_DEBUG(CXX14)
+/**
+ * Converts a Fixnum into C's `unsigned long`.
+ *
+ * @param[in]  x  Some Fixnum.
+ * @pre        Must not pass anything other than a Fixnum.
+ * @return     The passed value converted into C's `unsigned long`.
+ * @note       Negative fixnums will be converted into large unsigned longs.
+ */
+static inline unsigned long
+rb_fix2ulong(VALUE x)
+{
+    RBIMPL_ASSERT_OR_ASSUME(RB_FIXNUM_P(x));
+    return rb_fix2long(x);
+}
+
+/**
+ * Converts an instance of ::rb_cNumeric into C's `long`.
+ *
+ * @param[in]  x               Something numeric.
+ * @exception  rb_eTypeError   `x` is not a numeric.
+ * @exception  rb_eRangeError  `x` is out of range of `long`.
+ * @return     The passed value converted into C's `long`.
+ */
+static inline long
+rb_num2long_inline(VALUE x)
+{
+    if (RB_FIXNUM_P(x))
+        return RB_FIX2LONG(x);
+    else
+        return rb_num2long(x);
+}
+
+/**
+ * Converts an instance of ::rb_cNumeric into C's `unsigned long`.
+ *
+ * @param[in]  x               Something numeric.
+ * @exception  rb_eTypeError   `x` is not a numeric.
+ * @exception  rb_eRangeError  `x` is out of range of `unsigned long`.
+ * @return     The passed value converted into C's `unsigned long`.
+ *
+ * @internal
+ *
+ * This  (negative fixnum  would become  a large  unsigned long  while negative
+ * bignum  is an  exception)  has been  THE behaviour  of  NUM2ULONG since  the
+ * beginning.  It is strange, but we can  no longer change how it works at this
+ * moment.  We have to get by with it.
+ *
+ * @see https://bugs.ruby-lang.org/issues/9089
+ */
+static inline unsigned long
+rb_num2ulong_inline(VALUE x)
+{
+    if (RB_FIXNUM_P(x))
+        return RB_FIX2ULONG(x);
+    else
+        return rb_num2ulong(x);
+}
+
+/**
+ * Converts a C's `long` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  v  Arbitrary `long` value.
+ * @return     An instance of ::rb_cInteger.
+ */
+static inline VALUE
+rb_long2num_inline(long v)
+{
+    if (RB_FIXABLE(v))
+        return RB_LONG2FIX(v);
+    else
+        return rb_int2big(v);
+}
+
+/**
+ * Converts a C's `unsigned long` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  v  Arbitrary `unsigned long` value.
+ * @return     An instance of ::rb_cInteger.
+ */
+static inline VALUE
+rb_ulong2num_inline(unsigned long v)
+{
+    if (RB_POSFIXABLE(v))
+        return RB_LONG2FIX(v);
+    else
+        return rb_uint2big(v);
+}
+
+/**
+ * @cond INTERNAL_MACRO
+ *
+ * Following overload is necessary because sometimes  INT2FIX is used as a enum
+ * value (e.g. `enum {  FOO = INT2FIX(0) };`).  THIS IS NG  in theory because a
+ * VALUE does not fit into an enum (which must be a signed int).  But we cannot
+ * break existing codes.
+ */
+#if RBIMPL_HAS_ATTR_CONSTEXPR_CXX14
+# /* C++ can write constexpr as enum values. */
+
+#elif ! defined(HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P)
+# undef INT2FIX
+# define INT2FIX(i) (RBIMPL_CAST((VALUE)(i)) << 1 | RUBY_FIXNUM_FLAG)
+
+#else
+# undef INT2FIX
+# define INT2FIX(i)                                     \
+    __builtin_choose_expr(                              \
+        __builtin_constant_p(i),                        \
+        RBIMPL_CAST((VALUE)(i)) << 1 | RUBY_FIXNUM_FLAG, \
+        RB_INT2FIX(i))
+#endif
+/** @endcond */
+
+#endif /* RBIMPL_ARITHMETIC_LONG_H */

libs/libruby/ruby/internal/arithmetic/long_long.h

@@ -0,0 +1,135 @@
+#ifndef RBIMPL_ARITHMETIC_LONG_LONG_H                /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_LONG_LONG_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Arithmetic conversion between C's `long long` and Ruby's.
+ */
+#include "ruby/internal/value.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/special_consts.h"
+#include "ruby/backward/2/long_long.h"
+
+#define RB_LL2NUM  rb_ll2num_inline   /**< @alias{rb_ll2num_inline} */
+#define RB_ULL2NUM rb_ull2num_inline  /**< @alias{rb_ull2num_inline} */
+#define LL2NUM     RB_LL2NUM          /**< @old{RB_LL2NUM} */
+#define ULL2NUM    RB_ULL2NUM         /**< @old{RB_ULL2NUM} */
+#define RB_NUM2LL  rb_num2ll_inline   /**< @alias{rb_num2ll_inline} */
+#define RB_NUM2ULL rb_num2ull_inline  /**< @alias{rb_num2ull_inline} */
+#define NUM2LL     RB_NUM2LL          /**< @old{RB_NUM2LL} */
+#define NUM2ULL    RB_NUM2ULL         /**< @old{RB_NUM2ULL} */
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+/**
+ * Converts a C's `long long` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  num  Arbitrary `long long` value.
+ * @return     An instance of ::rb_cInteger.
+ */
+VALUE rb_ll2inum(LONG_LONG num);
+
+/**
+ * Converts a C's `unsigned long long` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  num  Arbitrary `unsigned long long` value.
+ * @return     An instance of ::rb_cInteger.
+ */
+VALUE rb_ull2inum(unsigned LONG_LONG num);
+
+/**
+ * Converts an instance of ::rb_cNumeric into C's `long long`.
+ *
+ * @param[in]  num             Something numeric.
+ * @exception  rb_eTypeError   `num` is not a numeric.
+ * @exception  rb_eRangeError  `num` is out of range of `long long`.
+ * @return     The passed value converted into C's `long long`.
+ */
+LONG_LONG rb_num2ll(VALUE num);
+
+/**
+ * Converts an instance of ::rb_cNumeric into C's `unsigned long long`.
+ *
+ * @param[in]  num             Something numeric.
+ * @exception  rb_eTypeError   `num` is not a numeric.
+ * @exception  rb_eRangeError  `num` is out of range of `unsigned long long`.
+ * @return     The passed value converted into C's `unsigned long long`.
+ */
+unsigned LONG_LONG rb_num2ull(VALUE num);
+RBIMPL_SYMBOL_EXPORT_END()
+
+/**
+ * Converts a C's `long long` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  n  Arbitrary `long long` value.
+ * @return     An instance of ::rb_cInteger
+ */
+static inline VALUE
+rb_ll2num_inline(LONG_LONG n)
+{
+    if (FIXABLE(n)) return LONG2FIX((long)n);
+    return rb_ll2inum(n);
+}
+
+/**
+ * Converts a C's `unsigned long long` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  n  Arbitrary `unsigned long long` value.
+ * @return     An instance of ::rb_cInteger
+ */
+static inline VALUE
+rb_ull2num_inline(unsigned LONG_LONG n)
+{
+    if (POSFIXABLE(n)) return LONG2FIX((long)n);
+    return rb_ull2inum(n);
+}
+
+/**
+ * Converts an instance of ::rb_cNumeric into C's `long long`.
+ *
+ * @param[in]  x               Something numeric.
+ * @exception  rb_eTypeError   `x` is not a numeric.
+ * @exception  rb_eRangeError  `x` is out of range of `long long`.
+ * @return     The passed value converted into C's `long long`.
+ */
+static inline LONG_LONG
+rb_num2ll_inline(VALUE x)
+{
+    if (RB_FIXNUM_P(x))
+        return RB_FIX2LONG(x);
+    else
+        return rb_num2ll(x);
+}
+
+/**
+ * Converts an instance of ::rb_cNumeric into C's `unsigned long long`.
+ *
+ * @param[in]  x               Something numeric.
+ * @exception  rb_eTypeError   `x` is not a numeric.
+ * @exception  rb_eRangeError  `x` is out of range of `unsigned long long`.
+ * @return     The passed value converted into C's `unsigned long long`.
+ */
+static inline unsigned LONG_LONG
+rb_num2ull_inline(VALUE x)
+{
+    if (RB_FIXNUM_P(x))
+        return RB_FIX2LONG(x);
+    else
+        return rb_num2ull(x);
+}
+
+#endif /* RBIMPL_ARITHMETIC_LONG_LONG_H */

libs/libruby/ruby/internal/arithmetic/mode_t.h

@@ -0,0 +1,41 @@
+#ifndef RBIMPL_ARITHMETIC_MODE_T_H                   /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_MODE_T_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Arithmetic conversion between C's `mode_t` and Ruby's.
+ */
+#include "ruby/internal/config.h"
+#include "ruby/internal/arithmetic/int.h"
+
+/** Converts a C's `mode_t` into an instance of ::rb_cInteger. */
+#ifndef NUM2MODET
+# define NUM2MODET RB_NUM2INT
+#endif
+
+/** Converts an instance of ::rb_cNumeric into C's `mode_t`. */
+#ifndef MODET2NUM
+# define MODET2NUM RB_INT2NUM
+#endif
+
+/** A rb_sprintf() format prefix to be used for a `mode_t` parameter. */
+#ifndef PRI_MODET_PREFIX
+# define PRI_MODET_PREFIX PRI_INT_PREFIX
+#endif
+
+#endif /* RBIMPL_ARITHMETIC_MODE_T_H */

libs/libruby/ruby/internal/arithmetic/off_t.h

@@ -0,0 +1,62 @@
+#ifndef RBIMPL_ARITHMETIC_OFF_T_H                    /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_OFF_T_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Arithmetic conversion between C's `off_t` and Ruby's.
+ */
+#include "ruby/internal/config.h"
+#include "ruby/internal/arithmetic/int.h"
+#include "ruby/internal/arithmetic/long.h"
+#include "ruby/internal/arithmetic/long_long.h"
+#include "ruby/backward/2/long_long.h"
+
+/** Converts a C's `off_t` into an instance of ::rb_cInteger. */
+#ifdef OFFT2NUM
+# /* take that. */
+#elif SIZEOF_OFF_T == SIZEOF_LONG_LONG
+# define OFFT2NUM RB_LL2NUM
+#elif SIZEOF_OFF_T == SIZEOF_LONG
+# define OFFT2NUM RB_LONG2NUM
+#else
+# define OFFT2NUM RB_INT2NUM
+#endif
+
+/** Converts an instance of ::rb_cNumeric into C's `off_t`. */
+#ifdef NUM2OFFT
+# /* take that. */
+#elif SIZEOF_OFF_T == SIZEOF_LONG_LONG
+# define NUM2OFFT RB_NUM2LL
+#elif SIZEOF_OFF_T == SIZEOF_LONG
+# define NUM2OFFT RB_NUM2LONG
+#else
+# define NUM2OFFT RB_NUM2INT
+#endif
+
+/** A rb_sprintf() format prefix to be used for an `off_t` parameter. */
+#ifdef PRI_OFFT_PREFIX
+# /* take that. */
+#elif SIZEOF_OFF_T == SIZEOF_LONG_LONG
+# define PRI_OFFT_PREFIX PRI_LL_PREFIX
+#elif SIZEOF_OFF_T == SIZEOF_LONG
+# define PRI_OFFT_PREFIX PRI_LONG_PREFIX
+#else
+# define PRI_OFFT_PREFIX PRI_INT_PREFIX
+#endif
+
+#endif /* RBIMPL_ARITHMETIC_OFF_T_H */

libs/libruby/ruby/internal/arithmetic/pid_t.h

@@ -0,0 +1,41 @@
+#ifndef RBIMPL_ARITHMETIC_PID_T_H                    /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_PID_T_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Arithmetic conversion between C's `pid_t` and Ruby's.
+ */
+#include "ruby/internal/config.h"
+#include "ruby/internal/arithmetic/long.h"
+
+/** Converts a C's `pid_t` into an instance of ::rb_cInteger. */
+#ifndef PIDT2NUM
+# define PIDT2NUM RB_LONG2NUM
+#endif
+
+/** Converts an instance of ::rb_cNumeric into C's `pid_t`. */
+#ifndef NUM2PIDT
+# define NUM2PIDT RB_NUM2LONG
+#endif
+
+/** A rb_sprintf() format prefix to be used for a `pid_t` parameter. */
+#ifndef PRI_PIDT_PREFIX
+# define PRI_PIDT_PREFIX PRI_LONG_PREFIX
+#endif
+
+#endif /* RBIMPL_ARITHMETIC_PID_T_H */

libs/libruby/ruby/internal/arithmetic/short.h

@@ -0,0 +1,113 @@
+#ifndef RBIMPL_ARITHMETIC_SHORT_H                    /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_SHORT_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Arithmetic conversion between C's `short` and Ruby's.
+ *
+ * Shyouhei  wonders:  why  there  is   no  SHORT2NUM,  given  there  are  both
+ * #USHORT2NUM and #CHR2FIX?
+ */
+#include "ruby/internal/value.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/special_consts.h"
+
+#define RB_NUM2SHORT  rb_num2short_inline /**< @alias{rb_num2short_inline} */
+#define RB_NUM2USHORT rb_num2ushort       /**< @alias{rb_num2ushort} */
+#define NUM2SHORT     RB_NUM2SHORT        /**< @old{RB_NUM2SHORT} */
+#define NUM2USHORT    RB_NUM2USHORT       /**< @old{RB_NUM2USHORT} */
+#define USHORT2NUM    RB_INT2FIX          /**< @old{RB_INT2FIX} */
+#define RB_FIX2SHORT  rb_fix2short        /**< @alias{rb_fix2ushort} */
+#define FIX2SHORT     RB_FIX2SHORT        /**< @old{RB_FIX2SHORT} */
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+
+/**
+ * Converts an instance of ::rb_cNumeric into C's `short`.
+ *
+ * @param[in]  num             Something numeric.
+ * @exception  rb_eTypeError   `num` is not a numeric.
+ * @exception  rb_eRangeError  `num` is out of range of `short`.
+ * @return     The passed value converted into C's `short`.
+ */
+short rb_num2short(VALUE num);
+
+/**
+ * Converts an instance of ::rb_cNumeric into C's `unsigned short`.
+ *
+ * @param[in]  num             Something numeric.
+ * @exception  rb_eTypeError   `num` is not a numeric.
+ * @exception  rb_eRangeError  `num` is out of range of `unsigned short`.
+ * @return     The passed value converted into C's `unsigned short`.
+ */
+unsigned short rb_num2ushort(VALUE num);
+
+/**
+ * Identical to rb_num2short().
+ *
+ * @param[in]  num             Something numeric.
+ * @exception  rb_eTypeError   `num` is not a numeric.
+ * @exception  rb_eRangeError  `num` is out of range of `short`.
+ * @return     The passed value converted into C's `short`.
+ *
+ * @internal
+ *
+ * This function seems to be a complete  waste of disk space.  @shyouhei has no
+ * idea why this is a different thing from rb_num2short().
+ */
+short rb_fix2short(VALUE num);
+
+/**
+ * Identical to rb_num2ushort().
+ *
+ * @param[in]  num             Something numeric.
+ * @exception  rb_eTypeError   `num` is not a numeric.
+ * @exception  rb_eRangeError  `num` is out of range of `unsigned short`.
+ * @return     The passed value converted into C's `unsigned short`.
+ *
+ * @internal
+ *
+ * This function seems to be a complete  waste of disk space.  @shyouhei has no
+ * idea why this is a different thing from rb_num2ushort().
+ */
+unsigned short rb_fix2ushort(VALUE num);
+RBIMPL_SYMBOL_EXPORT_END()
+
+/**
+ * Identical to rb_num2short().
+ *
+ * @param[in]  x               Something numeric.
+ * @exception  rb_eTypeError   `x` is not a numeric.
+ * @exception  rb_eRangeError  `x` is out of range of `short`.
+ * @return     The passed value converted into C's `short`.
+ *
+ * @internal
+ *
+ * This function seems to  be a complete waste of time.   @shyouhei has no idea
+ * why this is a different thing from rb_num2short().
+ */
+static inline short
+rb_num2short_inline(VALUE x)
+{
+    if (RB_FIXNUM_P(x))
+        return rb_fix2short(x);
+    else
+        return rb_num2short(x);
+}
+
+#endif /* RBIMPL_ARITHMETIC_SHORT_H */

libs/libruby/ruby/internal/arithmetic/size_t.h

@@ -0,0 +1,66 @@
+#ifndef RBIMPL_ARITHMETIC_SIZE_T_H                   /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_SIZE_T_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Arithmetic conversion between C's `size_t` and Ruby's.
+ */
+#include "ruby/internal/config.h"
+#include "ruby/internal/arithmetic/int.h"
+#include "ruby/internal/arithmetic/long.h"
+#include "ruby/internal/arithmetic/long_long.h"
+#include "ruby/backward/2/long_long.h"
+
+#if defined(__DOXYGEN__)
+# /** Converts a C's `size_t` into an instance of ::rb_cInteger. */
+# define RB_SIZE2NUM RB_ULONG2NUM
+# /** Converts a C's `ssize_t` into an instance of ::rb_cInteger. */
+# define RB_SSIZE2NUM RB_LONG2NUM
+#elif SIZEOF_SIZE_T == SIZEOF_LONG_LONG
+# define RB_SIZE2NUM RB_ULL2NUM
+# define RB_SSIZE2NUM RB_LL2NUM
+#elif SIZEOF_SIZE_T == SIZEOF_LONG
+# define RB_SIZE2NUM RB_ULONG2NUM
+# define RB_SSIZE2NUM RB_LONG2NUM
+#else
+# define RB_SIZE2NUM RB_UINT2NUM
+# define RB_SSIZE2NUM RB_INT2NUM
+#endif
+
+#if defined(__DOXYGEN__)
+# /** Converts an instance of ::rb_cInteger into C's `size_t`. */
+# define RB_NUM2SIZE RB_NUM2ULONG
+# /** Converts an instance of ::rb_cInteger into C's `ssize_t`. */
+# define RB_NUM2SSIZE RB_NUM2LONG
+#elif SIZEOF_SIZE_T == SIZEOF_LONG_LONG
+# define RB_NUM2SIZE RB_NUM2ULL
+# define RB_NUM2SSIZE RB_NUM2LL
+#elif SIZEOF_SIZE_T == SIZEOF_LONG
+# define RB_NUM2SIZE RB_NUM2ULONG
+# define RB_NUM2SSIZE RB_NUM2LONG
+#else
+# define RB_NUM2SIZE RB_NUM2UINT
+# define RB_NUM2SSIZE RB_NUM2INT
+#endif
+
+#define NUM2SIZET RB_NUM2SIZE   /**< @old{RB_NUM2SIZE} */
+#define SIZET2NUM RB_SIZE2NUM   /**< @old{RB_SIZE2NUM} */
+#define NUM2SSIZET RB_NUM2SSIZE /**< @old{RB_NUM2SSIZE} */
+#define SSIZET2NUM RB_SSIZE2NUM /**< @old{RB_SSIZE2NUM} */
+
+#endif /* RBIMPL_ARITHMETIC_SIZE_T_H */

libs/libruby/ruby/internal/arithmetic/st_data_t.h

@@ -0,0 +1,75 @@
+#ifndef RBIMPL_ARITHMERIC_ST_DATA_T_H                /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMERIC_ST_DATA_T_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Arithmetic conversion between C's `st_data_t` and Ruby's.
+ */
+#include "ruby/internal/arithmetic/fixnum.h"
+#include "ruby/internal/arithmetic/long.h"
+#include "ruby/internal/attr/artificial.h"
+#include "ruby/internal/attr/const.h"
+#include "ruby/internal/attr/constexpr.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/value.h"
+#include "ruby/assert.h"
+#include "ruby/st.h"
+
+#define ST2FIX    RB_ST2FIX     /**< @old{RB_ST2FIX} */
+/** @cond INTERNAL_MACRO */
+#define RB_ST2FIX RB_ST2FIX
+/** @endcond */
+
+RBIMPL_ATTR_CONST_UNLESS_DEBUG()
+RBIMPL_ATTR_CONSTEXPR_UNLESS_DEBUG(CXX14)
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Converts a C's `st_data_t` into an instance of ::rb_cInteger.
+ *
+ * @param[in]  i  The data in question.
+ * @return     A converted result
+ * @warning    THIS CONVERSION LOSES DATA!  Be warned.
+ * @see        https://bugs.ruby-lang.org/issues/13877
+ * @see        https://bugs.ruby-lang.org/issues/14218
+ *
+ * @internal
+ *
+ * This  is   needed  because  of   hash  functions.   Hash   functions  return
+ * `st_data_t`,  which could  theoretically  be bigger  than Fixnums.   However
+ * allocating Bignums for them every time  we calculate hash values is just too
+ * heavy.  To avoid  penalty we need to  ignore some upper bit(s)  and stick to
+ * Fixnums.  This function is used for that purpose.
+ */
+static inline VALUE
+RB_ST2FIX(st_data_t i)
+{
+    SIGNED_VALUE x = i;
+
+    if (x >= 0) {
+        x &= RUBY_FIXNUM_MAX;
+    }
+    else {
+        x |= RUBY_FIXNUM_MIN;
+    }
+
+    RBIMPL_ASSERT_OR_ASSUME(RB_FIXABLE(x));
+    unsigned long y = RBIMPL_CAST((unsigned long)x);
+    return RB_LONG2FIX(y);
+}
+
+#endif /* RBIMPL_ARITHMETIC_ST_DATA_T_H */

libs/libruby/ruby/internal/arithmetic/uid_t.h

@@ -0,0 +1,41 @@
+#ifndef RBIMPL_ARITHMETIC_UID_T_H                    /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ARITHMETIC_UID_T_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Arithmetic conversion between C's `uid_t` and Ruby's.
+ */
+#include "ruby/internal/config.h"
+#include "ruby/internal/arithmetic/long.h"
+
+/** Converts a C's `uid_t` into an instance of ::rb_cInteger. */
+#ifndef UIDT2NUM
+# define UIDT2NUM RB_LONG2NUM
+#endif
+
+/** Converts an instance of ::rb_cNumeric into C's `uid_t`. */
+#ifndef NUM2UIDT
+# define NUM2UIDT RB_NUM2LONG
+#endif
+
+/** A rb_sprintf() format prefix to be used for a `uid_t` parameter. */
+#ifndef PRI_UIDT_PREFIX
+# define PRI_UIDT_PREFIX PRI_LONG_PREFIX
+#endif
+
+#endif /* RBIMPL_ARITHMETIC_UID_T_H */

libs/libruby/ruby/internal/assume.h

@@ -0,0 +1,87 @@
+#ifndef RBIMPL_ASSUME_H                              /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ASSUME_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ASSUME / #RBIMPL_UNREACHABLE.
+ *
+ * These macros must be defined at once because:
+ *
+ * - #RBIMPL_ASSUME could fallback to #RBIMPL_UNREACHABLE.
+ * - #RBIMPL_UNREACHABLE could fallback to #RBIMPL_ASSUME.
+ */
+#include "ruby/internal/config.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/compiler_since.h"
+#include "ruby/internal/has/builtin.h"
+#include "ruby/internal/warning_push.h"
+
+/** @cond INTERNAL_MACRO */
+#if defined(HAVE___ASSUME)
+# define RBIMPL_HAVE___ASSUME
+#endif
+/** @endcond */
+
+/** Wraps (or simulates) `__builtin_unreachable`. */
+#if RBIMPL_HAS_BUILTIN(__builtin_unreachable)
+# define RBIMPL_UNREACHABLE_RETURN(_) __builtin_unreachable()
+
+#elif defined(RBIMPL_HAVE___ASSUME)
+# define RBIMPL_UNREACHABLE_RETURN(_) return (__assume(0), (_))
+
+#else
+# define RBIMPL_UNREACHABLE_RETURN(_) return (_)
+#endif
+
+/** Wraps (or simulates) `__builtin_unreachable`. */
+#if RBIMPL_HAS_BUILTIN(__builtin_unreachable)
+# define RBIMPL_UNREACHABLE __builtin_unreachable
+
+#elif defined(RBIMPL_HAVE___ASSUME)
+# define RBIMPL_UNREACHABLE() __assume(0)
+#endif
+
+/** Wraps (or simulates) `__assume`. */
+#if RBIMPL_COMPILER_SINCE(Intel, 13, 0, 0)
+# /* icc warnings are false positives.  Ignore them. */
+# /* "warning #2261: __assume expression with side effects discarded" */
+# define RBIMPL_ASSUME(expr)     \
+    RBIMPL_WARNING_PUSH()        \
+    RBIMPL_WARNING_IGNORED(2261) \
+    __assume(expr)              \
+    RBIMPL_WARNING_POP()
+
+#elif defined(RBIMPL_HAVE___ASSUME)
+# define RBIMPL_ASSUME __assume
+
+#elif RBIMPL_HAS_BUILTIN(__builtin_assume)
+# define RBIMPL_ASSUME __builtin_assume
+
+#elif ! defined(RBIMPL_UNREACHABLE)
+# define RBIMPL_ASSUME(_) RBIMPL_CAST((void)(_))
+
+#else
+# define RBIMPL_ASSUME(_) \
+    (RB_LIKELY(!!(_)) ? RBIMPL_CAST((void)0) : RBIMPL_UNREACHABLE())
+#endif
+
+#if ! defined(RBIMPL_UNREACHABLE)
+# define RBIMPL_UNREACHABLE() RBIMPL_ASSUME(0)
+#endif
+
+#endif /* RBIMPL_ASSUME_H */

libs/libruby/ruby/internal/attr/alloc_size.h

@@ -0,0 +1,32 @@
+#ifndef RBIMPL_ATTR_ALLOC_SIZE_H                     /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_ALLOC_SIZE_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_ALLOC_SIZE.
+ */
+#include "ruby/internal/has/attribute.h"
+
+/** Wraps (or simulates) `__attribute__((alloc_size))` */
+#if RBIMPL_HAS_ATTRIBUTE(alloc_size)
+# define RBIMPL_ATTR_ALLOC_SIZE(tuple) __attribute__((__alloc_size__ tuple))
+#else
+# define RBIMPL_ATTR_ALLOC_SIZE(tuple) /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_ALLOC_SIZE_H */

libs/libruby/ruby/internal/attr/artificial.h

@@ -0,0 +1,46 @@
+#ifndef RBIMPL_ATTR_ARTIFICIAL_H                     /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_ARTIFICIAL_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_ARTIFICIAL.
+ *
+ * ### Q&A ###
+ *
+ * - Q: What is this attribute?  I don't get what GCC manual is talking about.
+ *
+ * - A: In  short  it  is  an  attribute to  manipulate  GDB  backtraces.   The
+ *      attribute    makes    the   best    sense    when    it   comes    with
+ *      __attribute__((always_inline)).   When a  function annotated  with this
+ *      attribute gets inlined, and when you  somehow look at a backtrace which
+ *      includes such  inlined call site,  then the backtrace shows  the caller
+ *      and  not the  callee.  This  is handy  for instance  when an  identical
+ *      function is inlined  more than once in a single  big function.  On such
+ *      case it gets  vital to know where the inlining  happened in the callee.
+ *      See also https://stackoverflow.com/a/21936099
+ */
+#include "ruby/internal/has/attribute.h"
+
+/** Wraps (or simulates) `__attribute__((artificial))` */
+#if RBIMPL_HAS_ATTRIBUTE(artificial)
+# define RBIMPL_ATTR_ARTIFICIAL() __attribute__((__artificial__))
+#else
+# define RBIMPL_ATTR_ARTIFICIAL() /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_ARTIFICIAL_H */

libs/libruby/ruby/internal/attr/cold.h

@@ -0,0 +1,37 @@
+#ifndef RBIMPL_ATTR_COLD_H                           /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_COLD_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_COLD.
+ */
+#include "ruby/internal/compiler_is.h"
+#include "ruby/internal/has/attribute.h"
+
+/** Wraps (or simulates) `__attribute__((cold))` */
+#if RBIMPL_COMPILER_IS(SunPro)
+# /* Recent SunPro has __has_attribute, and is broken. */
+# /* It reports it has attribute cold, reality isn't (warnings issued). */
+# define RBIMPL_ATTR_COLD() /* void */
+#elif RBIMPL_HAS_ATTRIBUTE(cold)
+# define RBIMPL_ATTR_COLD() __attribute__((__cold__))
+#else
+# define RBIMPL_ATTR_COLD() /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_COLD_H */

libs/libruby/ruby/internal/attr/const.h

@@ -0,0 +1,46 @@
+#ifndef RBIMPL_ATTR_CONST_H                          /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_CONST_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_CONST.
+ */
+#include "ruby/internal/compiler_since.h"
+#include "ruby/internal/has/attribute.h"
+#include "ruby/internal/has/declspec_attribute.h"
+
+/** Wraps (or simulates) `__attribute__((const))` */
+#if RBIMPL_HAS_ATTRIBUTE(const)
+# define RBIMPL_ATTR_CONST() __attribute__((__const__))
+#elif RBIMPL_HAS_DECLSPEC_ATTRIBUTE(noalias)
+# /* If a function can be a const, that is also a noalias. */
+# define RBIMPL_ATTR_CONST() __declspec(noalias)
+#elif RBIMPL_COMPILER_SINCE(SunPro, 5, 10, 0)
+# define RBIMPL_ATTR_CONST() _Pragma("no_side_effect")
+#else
+# define RBIMPL_ATTR_CONST() /* void */
+#endif
+
+/** Enables #RBIMPL_ATTR_CONST if and only if. ! #RUBY_DEBUG. */
+#if !defined(RUBY_DEBUG) || !RUBY_DEBUG
+# define RBIMPL_ATTR_CONST_UNLESS_DEBUG() RBIMPL_ATTR_CONST()
+#else
+# define RBIMPL_ATTR_CONST_UNLESS_DEBUG() /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_CONST_H */

libs/libruby/ruby/internal/attr/constexpr.h

@@ -0,0 +1,84 @@
+#ifndef RBIMPL_ATTR_CONSTEXPR_H                      /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_CONSTEXPR_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      #RBIMPL_ATTR_CONSTEXPR.
+ */
+#include "ruby/internal/has/feature.h"
+#include "ruby/internal/compiler_is.h"
+
+/** @cond INTERNAL_MACRO */
+#if ! defined(__cplusplus)
+# /* Makes no sense. */
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX11 0
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX14 0
+
+#elif defined(__cpp_constexpr)
+# /* https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations */
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX11 (__cpp_constexpr >= 200704L)
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX14 (__cpp_constexpr >= 201304L)
+
+#elif RBIMPL_COMPILER_SINCE(MSVC, 19, 0, 0)
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX11 RBIMPL_COMPILER_SINCE(MSVC, 19, 00, 00)
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX14 RBIMPL_COMPILER_SINCE(MSVC, 19, 11, 00)
+
+#elif RBIMPL_COMPILER_SINCE(SunPro, 5, 13, 0)
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX11 (__cplusplus >= 201103L)
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX14 (__cplusplus >= 201402L)
+
+#elif RBIMPL_COMPILER_SINCE(GCC, 4, 9, 0)
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX11 (__cplusplus >= 201103L)
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX14 (__cplusplus >= 201402L)
+
+#elif RBIMPL_HAS_FEATURE(cxx_relaxed_constexpr)
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX11 1
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX14 1
+
+#elif RBIMPL_HAS_FEATURE(cxx_constexpr)
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX11 1
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX14 0
+
+#else
+# /* :FIXME: icpc must have constexpr but don't know how to detect. */
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX11 0
+# define RBIMPL_HAS_ATTR_CONSTEXPR_CXX14 0
+#endif
+/** @endcond */
+
+/** Wraps (or simulates) C++11 `constexpr`.  */
+#if RBIMPL_HAS_ATTR_CONSTEXPR_CXX14
+# define RBIMPL_ATTR_CONSTEXPR(_) constexpr
+
+#elif RBIMPL_HAS_ATTR_CONSTEXPR_CXX11
+# define RBIMPL_ATTR_CONSTEXPR(_) RBIMPL_ATTR_CONSTEXPR_ ## _
+# define RBIMPL_ATTR_CONSTEXPR_CXX11 constexpr
+# define RBIMPL_ATTR_CONSTEXPR_CXX14 /* void */
+
+#else
+# define RBIMPL_ATTR_CONSTEXPR(_) /* void */
+#endif
+
+/** Enables #RBIMPL_ATTR_CONSTEXPR if and only if. ! #RUBY_DEBUG. */
+#if !RUBY_DEBUG
+# define RBIMPL_ATTR_CONSTEXPR_UNLESS_DEBUG(_) RBIMPL_ATTR_CONSTEXPR(_)
+#else
+# define RBIMPL_ATTR_CONSTEXPR_UNLESS_DEBUG(_) /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_CONSTEXPR_H */

libs/libruby/ruby/internal/attr/deprecated.h

@@ -0,0 +1,75 @@
+#ifndef RBIMPL_ATTR_DEPRECATED_H                     /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_DEPRECATED_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_DEPRECATED.
+ */
+#include "ruby/internal/compiler_since.h"
+#include "ruby/internal/has/attribute.h"
+#include "ruby/internal/has/c_attribute.h"
+#include "ruby/internal/has/cpp_attribute.h"
+#include "ruby/internal/has/declspec_attribute.h"
+#include "ruby/internal/has/extension.h"
+
+/** Wraps (or simulates) `[[deprecated]]` */
+#if defined(__COVERITY__)
+/* Coverity Scan emulates gcc but seems not to support this attribute correctly */
+# define RBIMPL_ATTR_DEPRECATED(msg)
+
+#elif RBIMPL_HAS_EXTENSION(attribute_deprecated_with_message)
+# define RBIMPL_ATTR_DEPRECATED(msg) __attribute__((__deprecated__ msg))
+
+#elif defined(__cplusplus) && RBIMPL_COMPILER_SINCE(GCC, 10, 1, 0) && RBIMPL_COMPILER_BEFORE(GCC, 10, 3, 0)
+# /* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95302 */
+# define RBIMPL_ATTR_DEPRECATED(msg) /* disable until they fix this bug */
+
+#elif RBIMPL_COMPILER_SINCE(GCC, 4, 5, 0)
+# define RBIMPL_ATTR_DEPRECATED(msg) __attribute__((__deprecated__ msg))
+
+#elif RBIMPL_COMPILER_SINCE(Intel, 13, 0, 0)
+# define RBIMPL_ATTR_DEPRECATED(msg) __attribute__((__deprecated__ msg))
+
+#elif RBIMPL_HAS_ATTRIBUTE(deprecated) /* but not with message. */
+# define RBIMPL_ATTR_DEPRECATED(msg) __attribute__((__deprecated__))
+
+#elif RBIMPL_COMPILER_SINCE(MSVC, 14, 0, 0)
+# define RBIMPL_ATTR_DEPRECATED(msg) __declspec(deprecated msg)
+
+#elif RBIMPL_HAS_DECLSPEC_ATTRIBUTE(deprecated)
+# define RBIMPL_ATTR_DEPRECATED(msg) __declspec(deprecated)
+
+#elif RBIMPL_HAS_CPP_ATTRIBUTE(deprecated)
+# define RBIMPL_ATTR_DEPRECATED(msg) [[deprecated msg]]
+
+#elif RBIMPL_HAS_C_ATTRIBUTE(deprecated)
+# define RBIMPL_ATTR_DEPRECATED(msg) [[deprecated msg]]
+
+#else
+# define RBIMPL_ATTR_DEPRECATED(msg) /* void */
+#endif
+
+/** This is when a function is used internally (for backwards compatibility
+ * etc.), but extension libraries must consider it deprecated. */
+#if defined(RUBY_EXPORT)
+# define RBIMPL_ATTR_DEPRECATED_EXT(msg) /* void */
+#else
+# define RBIMPL_ATTR_DEPRECATED_EXT(msg) RBIMPL_ATTR_DEPRECATED(msg)
+#endif
+
+#endif /* RBIMPL_ATTR_DEPRECATED_H */

libs/libruby/ruby/internal/attr/diagnose_if.h

@@ -0,0 +1,42 @@
+#ifndef RBIMPL_ATTR_DIAGNOSE_IF_H                    /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_DIAGNOSE_IF_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_DIAGNOSE_IF.
+ */
+#include "ruby/internal/has/attribute.h"
+#include "ruby/internal/warning_push.h"
+
+/** Wraps (or simulates) `__attribute__((diagnose_if))` */
+#if RBIMPL_COMPILER_BEFORE(Clang, 5, 0, 0)
+# /* https://bugs.llvm.org/show_bug.cgi?id=34319 */
+# define RBIMPL_ATTR_DIAGNOSE_IF(_, __, ___) /* void */
+
+#elif RBIMPL_HAS_ATTRIBUTE(diagnose_if)
+# define RBIMPL_ATTR_DIAGNOSE_IF(_, __, ___) \
+    RBIMPL_WARNING_PUSH() \
+    RBIMPL_WARNING_IGNORED(-Wgcc-compat) \
+    __attribute__((__diagnose_if__(_, __, ___))) \
+    RBIMPL_WARNING_POP()
+
+#else
+# define RBIMPL_ATTR_DIAGNOSE_IF(_, __, ___) /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_DIAGNOSE_IF_H */

libs/libruby/ruby/internal/attr/enum_extensibility.h

@@ -0,0 +1,32 @@
+#ifndef RBIMPL_ATTR_ENUM_EXTENSIBILITY_H             /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_ENUM_EXTENSIBILITY_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      #RBIMPL_ATTR_ENUM_EXTENSIBILITY.
+ */
+#include "ruby/internal/has/attribute.h"
+
+/** Wraps (or simulates) `__attribute__((enum_extensibility))` */
+#if RBIMPL_HAS_ATTRIBUTE(enum_extensibility)
+# define RBIMPL_ATTR_ENUM_EXTENSIBILITY(_) __attribute__((__enum_extensibility__(_)))
+#else
+# define RBIMPL_ATTR_ENUM_EXTENSIBILITY(_) /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_ENUM_EXTENSIBILITY_H */

libs/libruby/ruby/internal/attr/error.h

@@ -0,0 +1,32 @@
+#ifndef RBIMPL_ATTR_ERROR_H                          /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_ERROR_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_ERROR.
+ */
+#include "ruby/internal/has/attribute.h"
+
+/** Wraps (or simulates) `__attribute__((error))` */
+#if RBIMPL_HAS_ATTRIBUTE(error)
+# define RBIMPL_ATTR_ERROR(msg) __attribute__((__error__ msg))
+#else
+# define RBIMPL_ATTR_ERROR(msg) /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_ERROR_H */

libs/libruby/ruby/internal/attr/flag_enum.h

@@ -0,0 +1,33 @@
+#ifndef RBIMPL_ATTR_FLAG_ENUM_H                      /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_FLAG_ENUM_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_FLAG_ENUM.
+ * @see        https://clang.llvm.org/docs/AttributeReference.html#flag_enum
+ */
+#include "ruby/internal/has/attribute.h"
+
+/** Wraps (or simulates) `__attribute__((flag_enum)` */
+#if RBIMPL_HAS_ATTRIBUTE(flag_enum)
+# define RBIMPL_ATTR_FLAG_ENUM() __attribute__((__flag_enum__))
+#else
+# define RBIMPL_ATTR_FLAG_ENUM() /* void */
+#endif
+
+#endif /* RBIMPLATTR_FLAG_ENUM_H */

libs/libruby/ruby/internal/attr/forceinline.h

@@ -0,0 +1,40 @@
+#ifndef RBIMPL_ATTR_FORCEINLINE_H                    /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_FORCEINLINE_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_FORCEINLINE.
+ */
+#include "ruby/internal/compiler_since.h"
+#include "ruby/internal/has/attribute.h"
+
+/**
+ * Wraps (or  simulates) `__forceinline`.  MSVC complains  on declarations like
+ * `static inline __forceinline void foo()`.   It  seems  MSVC's  `inline`  and
+ * `__forceinline` are mutually exclusive.  We have to mimic that behaviour for
+ * non-MSVC compilers.
+ */
+#if RBIMPL_COMPILER_SINCE(MSVC, 12, 0, 0)
+# define RBIMPL_ATTR_FORCEINLINE() __forceinline
+#elif RBIMPL_HAS_ATTRIBUTE(always_inline)
+# define RBIMPL_ATTR_FORCEINLINE() __attribute__((__always_inline__)) inline
+#else
+# define RBIMPL_ATTR_FORCEINLINE() inline
+#endif
+
+#endif /* RBIMPL_ATTR_FORCEINLINE_H */

libs/libruby/ruby/internal/attr/format.h

@@ -0,0 +1,38 @@
+#ifndef RBIMPL_ATTR_FORMAT_H                         /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_FORMAT_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_FORMAT.
+ */
+#include "ruby/internal/has/attribute.h"
+
+/** Wraps (or simulates) `__attribute__((format))` */
+#if RBIMPL_HAS_ATTRIBUTE(format)
+# define RBIMPL_ATTR_FORMAT(x, y, z) __attribute__((__format__(x, y, z)))
+#else
+# define RBIMPL_ATTR_FORMAT(x, y, z) /* void */
+#endif
+
+#if defined(__MINGW_PRINTF_FORMAT)
+# define RBIMPL_PRINTF_FORMAT __MINGW_PRINTF_FORMAT
+#else
+# define RBIMPL_PRINTF_FORMAT __printf__
+#endif
+
+#endif /* RBIMPL_ATTR_FORMAT_H */

libs/libruby/ruby/internal/attr/maybe_unused.h

@@ -0,0 +1,38 @@
+#ifndef RBIMPL_ATTR_MAYBE_UNUSED_H                   /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_MAYBE_UNUSED_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_MAYBE_UNUSED.
+ */
+#include "ruby/internal/has/attribute.h"
+#include "ruby/internal/has/c_attribute.h"
+#include "ruby/internal/has/cpp_attribute.h"
+
+/** Wraps  (or simulates)  `[[maybe_unused]]` */
+#if RBIMPL_HAS_CPP_ATTRIBUTE(maybe_unused)
+# define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
+#elif RBIMPL_HAS_C_ATTRIBUTE(maybe_unused)
+# define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
+#elif RBIMPL_HAS_ATTRIBUTE(unused)
+# define RBIMPL_ATTR_MAYBE_UNUSED() __attribute__((__unused__))
+#else
+# define RBIMPL_ATTR_MAYBE_UNUSED() /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_MAYBE_UNUSED */

libs/libruby/ruby/internal/attr/noalias.h

@@ -0,0 +1,69 @@
+#ifndef RBIMPL_ATTR_NOALIAS_H                        /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_NOALIAS_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_NOALIAS.
+ *
+ * ### Q&A ###
+ *
+ * - Q: There  are  seemingly   similar  attributes  named  #RBIMPL_ATTR_CONST,
+ *      #RBIMPL_ATTR_PURE, and #RBIMPL_ATTR_NOALIAS.  What are the difference?
+ *
+ * - A: Allowed operations are different.
+ *
+ *     - #RBIMPL_ATTR_CONST ... Functions attributed by this are not allowed to
+ *       read/write  _any_ pointers  at all  (there are  exceptional situations
+ *       when  reading a  pointer is  possible but  forget that;  they are  too
+ *       exceptional  to be  useful).  Just  remember that  everything pointer-
+ *       related are NG.
+ *
+ *     - #RBIMPL_ATTR_PURE  ...   Functions attributed  by  this  can read  any
+ *       nonvolatile pointers, but  no writes are allowed at  all.  The ability
+ *       to read _any_ nonvolatile pointers  makes it possible to mark ::VALUE-
+ *       taking functions as being pure, as long as they are read-only.
+ *
+ *     - #RBIMPL_ATTR_NOALIAS  ...  Can  both   read/write,  but  only  through
+ *       pointers  passed to  the function  as parameters.   This is  a typical
+ *       situation when you create a  C++ non-static member function which only
+ *       concerns `this`.  No  global variables are allowed  to read/write.  So
+ *       this is not a super-set of being pure.  If you want to read something,
+ *       that has to  be passed to the function as  a pointer.  ::VALUE -taking
+ *       functions thus cannot be attributed as such.
+ */
+#include "ruby/internal/compiler_since.h"
+#include "ruby/internal/has/declspec_attribute.h"
+
+/** Wraps (or simulates) `__declspec((noalias))` */
+#if RBIMPL_COMPILER_BEFORE(Clang, 12, 0, 0)
+# /*
+#  * `::llvm::Attribute::ArgMemOnly`  was buggy  before.  Maybe  because nobody
+#  * actually seriously used it.  It seems they somehow mitigated the situation
+#  * in  LLVM  12.  Still  not  found  the  exact  changeset which  fiexed  the
+#  * attribute, though.
+#  *
+#  * :FIXME: others (armclang, xlclang, ...) can also be affected?
+#  */
+# define RBIMPL_ATTR_NOALIAS() /* void */
+#elif RBIMPL_HAS_DECLSPEC_ATTRIBUTE(noalias)
+# define RBIMPL_ATTR_NOALIAS() __declspec(noalias)
+#else
+# define RBIMPL_ATTR_NOALIAS() /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_NOALIAS_H */

libs/libruby/ruby/internal/attr/nodiscard.h

@@ -0,0 +1,45 @@
+#ifndef RBIMPL_ATTR_NODISCARD_H                      /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_NODISCARD_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_NODISCARD.
+ */
+#include "ruby/internal/has/attribute.h"
+#include "ruby/internal/has/c_attribute.h"
+#include "ruby/internal/has/cpp_attribute.h"
+
+/**
+ * Wraps  (or simulates)  `[[nodiscard]]`.  In  C++  (at least  since C++20)  a
+ * nodiscard attribute can  have a message why the result shall not be ignored.
+ * However GCC attribute and SAL annotation cannot take them.
+ */
+#if RBIMPL_HAS_CPP_ATTRIBUTE(nodiscard)
+# define RBIMPL_ATTR_NODISCARD() [[nodiscard]]
+#elif RBIMPL_HAS_C_ATTRIBUTE(nodiscard)
+# define RBIMPL_ATTR_NODISCARD() [[nodiscard]]
+#elif RBIMPL_HAS_ATTRIBUTE(warn_unused_result)
+# define RBIMPL_ATTR_NODISCARD() __attribute__((__warn_unused_result__))
+#elif defined(_Check_return_)
+# /* Take SAL definition. */
+# define RBIMPL_ATTR_NODISCARD() _Check_return_
+#else
+# define RBIMPL_ATTR_NODISCARD() /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_NODISCARD_H */

libs/libruby/ruby/internal/attr/noexcept.h

@@ -0,0 +1,91 @@
+#ifndef RBIMPL_ATTR_NOEXCEPT_H                       /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_NOEXCEPT_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_NOEXCEPT.
+ *
+ * This isn't actually an attribute in C++ but who cares...
+ *
+ * Mainly due  to aesthetic reasons,  this one is  rarely used in  the project.
+ * But can  be handy on  occasions, especially when a  function's noexcept-ness
+ * depends on its calling functions.
+ *
+ * ### Q&A ###
+ *
+ * - Q: Can a function that raises Ruby exceptions be attributed `noexcept`?
+ *
+ * - A: Yes.   `noexcept` is  about  C++ exceptions,  not  Ruby's.  They  don't
+ *      interface each other.  You can  safely attribute a function that raises
+ *      Ruby exceptions as `noexcept`.
+ *
+ * - Q: How, then, can I assert that  a function I wrote doesn't raise any Ruby
+ *      exceptions?
+ *
+ * - A: `__attribute__((__leaf__))` is for that purpose.  A function attributed
+ *      as leaf can still throw C++  exceptions, but not Ruby's.  Note however,
+ *      that it's extremely difficult -- if  not impossible -- to assert that a
+ *      function  doesn't  raise any  Ruby  exceptions  at  all.  Use  of  that
+ *      attribute is not  recommended; mere mortals can't properly  use that by
+ *      hand.
+ *
+ * - Q: Does it make sense to attribute an inline function `noexcept`?
+ *
+ * - A: I thought so before.  But no, I don't think they are useful any longer.
+ *
+ *     - When an  inline function attributed `noexcept`  actually doesn't throw
+ *       any  exceptions at  all:  these days  I don't  see  any difference  in
+ *       generated assembly  by adding/removing this attribute.   C++ compilers
+ *       get smarter and  smarter.  Today they can infer if  it actually throws
+ *       or not without any annotations by humans (correct me if I'm wrong).
+ *
+ *     - When an inline function attributed `noexcepr` actually _does_ throw an
+ *       exception:  they  have to  call  `std::terminate`  then (C++  standard
+ *       mandates  so).  This  means exception  handling routines  are actually
+ *       enforced, not  omitted.  This doesn't impact  runtime performance (The
+ *       Itanium C++ ABI has zero-cost  exception handling), but does impact on
+ *       generated binary size.  This is bad.
+ */
+#include "ruby/internal/compiler_since.h"
+#include "ruby/internal/has/feature.h"
+
+/** Wraps (or simulates) C++11 `noexcept` */
+#if ! defined(__cplusplus)
+# /* Doesn't make sense. */
+# define RBIMPL_ATTR_NOEXCEPT(_) /* void */
+
+#elif RBIMPL_HAS_FEATURE(cxx_noexcept)
+# define RBIMPL_ATTR_NOEXCEPT(_) noexcept(noexcept(_))
+
+#elif defined(__GXX_EXPERIMENTAL_CXX0X__) && __GXX_EXPERIMENTAL_CXX0X__
+# define RBIMPL_ATTR_NOEXCEPT(_) noexcept(noexcept(_))
+
+#elif defined(__INTEL_CXX11_MODE__)
+# define RBIMPL_ATTR_NOEXCEPT(_) noexcept(noexcept(_))
+
+#elif RBIMPL_COMPILER_SINCE(MSVC, 19, 0, 0)
+# define RBIMPL_ATTR_NOEXCEPT(_) noexcept(noexcept(_))
+
+#elif __cplusplus >= 201103L
+# define RBIMPL_ATTR_NOEXCEPT(_) noexcept(noexcept(_))
+
+#else
+# define RBIMPL_ATTR_NOEXCEPT(_) /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_NOEXCEPT_H */

libs/libruby/ruby/internal/attr/noinline.h

@@ -0,0 +1,35 @@
+#ifndef RBIMPL_ATTR_NOINLINE_H                       /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_NOINLINE_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_NOINLINE.
+ */
+#include "ruby/internal/has/attribute.h"
+#include "ruby/internal/has/declspec_attribute.h"
+
+/** Wraps (or simulates) `__declspec(noinline)` */
+#if RBIMPL_HAS_DECLSPEC_ATTRIBUTE(noinline)
+# define RBIMPL_ATTR_NOINLINE() __declspec(noinline)
+#elif RBIMPL_HAS_ATTRIBUTE(noinline)
+# define RBIMPL_ATTR_NOINLINE() __attribute__((__noinline__))
+#else
+# define RBIMPL_ATTR_NOINLINE() /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_NOINLINE_H */

libs/libruby/ruby/internal/attr/nonnull.h

@@ -0,0 +1,34 @@
+#ifndef RBIMPL_ATTR_NONNULL_H                        /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_NONNULL_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_NONNULL.
+ */
+#include "ruby/internal/has/attribute.h"
+
+/** Wraps (or simulates) `__attribute__((nonnull))` */
+#if RBIMPL_HAS_ATTRIBUTE(nonnull)
+# define RBIMPL_ATTR_NONNULL(list) __attribute__((__nonnull__ list))
+# define RBIMPL_NONNULL_ARG(arg) RBIMPL_ASSERT_NOTHING
+#else
+# define RBIMPL_ATTR_NONNULL(list) /* void */
+# define RBIMPL_NONNULL_ARG(arg) RUBY_ASSERT(arg)
+#endif
+
+#endif /* RBIMPL_ATTR_NONNULL_H */

libs/libruby/ruby/internal/attr/noreturn.h

@@ -0,0 +1,48 @@
+#ifndef RBIMPL_ATTR_NORETURN_H                       /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_NORETURN_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_NORETURN.
+ */
+#include "ruby/internal/has/attribute.h"
+#include "ruby/internal/has/cpp_attribute.h"
+#include "ruby/internal/has/declspec_attribute.h"
+
+/** Wraps (or simulates) `[[noreturn]]` */
+#if RBIMPL_HAS_DECLSPEC_ATTRIBUTE(noreturn)
+# define RBIMPL_ATTR_NORETURN() __declspec(noreturn)
+
+#elif RBIMPL_HAS_ATTRIBUTE(noreturn)
+# define RBIMPL_ATTR_NORETURN() __attribute__((__noreturn__))
+
+#elif RBIMPL_HAS_CPP_ATTRIBUTE(noreturn)
+# define RBIMPL_ATTR_NORETURN() [[noreturn]]
+
+#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112)
+# define RBIMPL_ATTR_NORETURN() _Noreturn
+
+#elif defined(_Noreturn)
+# /* glibc <sys/cdefs.h> has this macro. */
+# define RBIMPL_ATTR_NORETURN() _Noreturn
+
+#else
+# define RBIMPL_ATTR_NORETURN() /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_NORETURN_H */

libs/libruby/ruby/internal/attr/pure.h

@@ -0,0 +1,43 @@
+#ifndef RBIMPL_ATTR_PURE_H                           /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_PURE_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_PURE.
+ */
+#include "ruby/internal/compiler_since.h"
+#include "ruby/internal/has/attribute.h"
+#include "ruby/assert.h"
+
+/** Wraps (or simulates) `__attribute__((pure))` */
+#if RBIMPL_HAS_ATTRIBUTE(pure)
+# define RBIMPL_ATTR_PURE() __attribute__((__pure__))
+#elif RBIMPL_COMPILER_SINCE(SunPro, 5, 10, 0)
+# define RBIMPL_ATTR_PURE() _Pragma("does_not_write_global_data")
+#else
+# define RBIMPL_ATTR_PURE() /* void */
+#endif
+
+/** Enables #RBIMPL_ATTR_PURE if and only if. ! #RUBY_DEBUG. */
+#if !RUBY_DEBUG
+# define RBIMPL_ATTR_PURE_UNLESS_DEBUG() RBIMPL_ATTR_PURE()
+#else
+# define RBIMPL_ATTR_PURE_UNLESS_DEBUG() /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_PURE_H */

libs/libruby/ruby/internal/attr/restrict.h

@@ -0,0 +1,44 @@
+#ifndef RBIMPL_ATTR_RESTRICT_H                       /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_RESTRICT_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_RESTRICT.
+ */
+#include "ruby/internal/compiler_since.h"
+#include "ruby/internal/has/attribute.h"
+
+/* :FIXME:  config.h  includes conflicting  `#define  restrict`.   MSVC can  be
+ * detected  using `RBIMPL_COMPILER_SINCE()`,  but  Clang &  family cannot  use
+ * `__has_declspec_attribute()` which involves macro substitution. */
+
+/** Wraps (or simulates) `__declspec(restrict)` */
+#if RBIMPL_COMPILER_SINCE(MSVC, 14, 0, 0)
+# define RBIMPL_ATTR_RESTRICT() __declspec(re ## strict)
+
+#elif RBIMPL_HAS_ATTRIBUTE(malloc)
+# define RBIMPL_ATTR_RESTRICT() __attribute__((__malloc__))
+
+#elif RBIMPL_COMPILER_SINCE(SunPro, 5, 10, 0)
+# define RBIMPL_ATTR_RESTRICT() _Pragma("returns_new_memory")
+
+#else
+# define RBIMPL_ATTR_RESTRICT() /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_RESTRICT_H */

libs/libruby/ruby/internal/attr/returns_nonnull.h

@@ -0,0 +1,37 @@
+#ifndef RBIMPL_ATTR_RETURNS_NONNULL_H                /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_RETURNS_NONNULL_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_RETURNS_NONNULL.
+ */
+#include "ruby/internal/has/attribute.h"
+
+/** Wraps (or simulates) `__attribute__((returns_nonnull))` */
+#if defined(_Ret_nonnull_)
+# /* Take SAL definition. */
+# define RBIMPL_ATTR_RETURNS_NONNULL() _Ret_nonnull_
+
+#elif RBIMPL_HAS_ATTRIBUTE(returns_nonnull)
+# define RBIMPL_ATTR_RETURNS_NONNULL() __attribute__((__returns_nonnull__))
+
+#else
+# define RBIMPL_ATTR_RETURNS_NONNULL() /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_RETURNS_NONNULL_H */

libs/libruby/ruby/internal/attr/warning.h

@@ -0,0 +1,32 @@
+#ifndef RBIMPL_ATTR_WARNING_H                        /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_WARNING_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_WARNING.
+ */
+#include "ruby/internal/has/attribute.h"
+
+/** Wraps (or simulates) `__attribute__((warning))` */
+#if RBIMPL_HAS_ATTRIBUTE(warning)
+# define RBIMPL_ATTR_WARNING(msg) __attribute__((__warning__ msg))
+#else
+# define RBIMPL_ATTR_WARNING(msg) /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_WARNING_H */

libs/libruby/ruby/internal/attr/weakref.h

@@ -0,0 +1,32 @@
+#ifndef RBIMPL_ATTR_WEAKREF_H                        /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ATTR_WEAKREF_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_ATTR_WEAKREF.
+ */
+#include "ruby/internal/has/attribute.h"
+
+/** Wraps (or simulates) `__attribute__((weakref))` */
+#if RBIMPL_HAS_ATTRIBUTE(weakref)
+# define RBIMPL_ATTR_WEAKREF(sym) __attribute__((__weakref__(# sym)))
+#else
+# define RBIMPL_ATTR_WEAKREF(sym) /* void */
+#endif
+
+#endif /* RBIMPL_ATTR_WEAKREF_H */

libs/libruby/ruby/internal/cast.h

@@ -0,0 +1,50 @@
+#ifndef RBIMPL_CAST_H                                /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_CAST_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines RBIMPL_CAST.
+ *
+ * This casting macro makes sense only inside  of other macros that are part of
+ * public headers.  They could be used  from C++, and C-style casts could issue
+ * warnings.  Ruby internals are pure C so they should not bother.
+ */
+#include "ruby/internal/compiler_since.h"
+#include "ruby/internal/has/warning.h"
+#include "ruby/internal/warning_push.h"
+
+#if ! defined(__cplusplus)
+# define RBIMPL_CAST(expr) (expr)
+
+#elif RBIMPL_COMPILER_SINCE(GCC, 4, 6, 0)
+# /* g++ has -Wold-style-cast since 1997 or so, but its _Pragma is broken. */
+# /* See https://gcc.godbolt.org/z/XWhU6J */
+# define RBIMPL_CAST(expr) (expr)
+# pragma GCC diagnostic ignored "-Wold-style-cast"
+
+#elif RBIMPL_HAS_WARNING("-Wold-style-cast")
+# define RBIMPL_CAST(expr)                   \
+    RBIMPL_WARNING_PUSH()                    \
+    RBIMPL_WARNING_IGNORED(-Wold-style-cast) \
+    (expr)                                  \
+    RBIMPL_WARNING_POP()
+
+#else
+# define RBIMPL_CAST(expr) (expr)
+#endif
+
+#endif /* RBIMPL_CAST_H */

libs/libruby/ruby/internal/compiler_is.h

@@ -0,0 +1,45 @@
+#ifndef RBIMPL_COMPILER_IS_H                         /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_COMPILER_IS_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_COMPILER_IS.
+ */
+
+/**
+ * @brief   Checks if the compiler is of given brand.
+ * @param   cc     Compiler brand, like `MSVC`.
+ * @retval  true   It is.
+ * @retval  false  It isn't.
+ */
+#define RBIMPL_COMPILER_IS(cc) RBIMPL_COMPILER_IS_ ## cc
+
+#include "ruby/internal/compiler_is/apple.h"
+#include "ruby/internal/compiler_is/clang.h"
+#include "ruby/internal/compiler_is/gcc.h"
+#include "ruby/internal/compiler_is/intel.h"
+#include "ruby/internal/compiler_is/msvc.h"
+#include "ruby/internal/compiler_is/sunpro.h"
+/* :TODO: Other possible compilers to support:
+ *
+ * - IBM  XL: recent  XL are  clang-backended  so some  tweaks like  we do  for
+ *   Apple's might be needed.
+ *
+ * - ARM's armclang: ditto, it can be clang-backended.  */
+
+#endif /* RBIMPL_COMPILER_IS_H */

libs/libruby/ruby/internal/compiler_is/apple.h

@@ -0,0 +1,40 @@
+#ifndef RBIMPL_COMPILER_IS_APPLE_H                   /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_COMPILER_IS_APPLE_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines RBIMPL_COMPILER_IS_Apple.
+ *
+ * Apple  ships clang.   Problem is,  its  `__clang_major__` etc.  are not  the
+ * upstream LLVM  version, but XCode's.  We  have to think Apple's  is distinct
+ * from LLVM's,  when it comes  to compiler  detection business in  this header
+ * file.
+ */
+#if ! defined(__clang__)
+# define RBIMPL_COMPILER_IS_Apple 0
+
+#elif ! defined(__apple_build_version__)
+# define RBIMPL_COMPILER_IS_Apple 0
+
+#else
+# define RBIMPL_COMPILER_IS_Apple 1
+# define RBIMPL_COMPILER_VERSION_MAJOR __clang_major__
+# define RBIMPL_COMPILER_VERSION_MINOR __clang_minor__
+# define RBIMPL_COMPILER_VERSION_PATCH __clang_patchlevel__
+#endif
+
+#endif /* RBIMPL_COMPILER_IS_APPLE_H */

libs/libruby/ruby/internal/compiler_is/clang.h

@@ -0,0 +1,37 @@
+#ifndef RBIMPL_COMPILER_IS_CLANG_H                   /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_COMPILER_IS_CLANG_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines RBIMPL_COMPILER_IS_Clang.
+ */
+#include "ruby/internal/compiler_is/apple.h"
+
+#if ! defined(__clang__)
+# define RBIMPL_COMPILER_IS_Clang 0
+
+#elif RBIMPL_COMPILER_IS(Apple)
+# define RBIMPL_COMPILER_IS_Clang 0
+
+#else
+# define RBIMPL_COMPILER_IS_Clang 1
+# define RBIMPL_COMPILER_VERSION_MAJOR __clang_major__
+# define RBIMPL_COMPILER_VERSION_MINOR __clang_minor__
+# define RBIMPL_COMPILER_VERSION_PATCH __clang_patchlevel__
+#endif
+
+#endif /* RBIMPL_COMPILER_IS_CLANG_H */

libs/libruby/ruby/internal/compiler_is/gcc.h

@@ -0,0 +1,45 @@
+#ifndef RBIMPL_COMPILER_IS_GCC_H                     /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_COMPILER_IS_GCC_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines RBIMPL_COMPILER_IS_GCC.
+ */
+#include "ruby/internal/compiler_is/apple.h"
+#include "ruby/internal/compiler_is/clang.h"
+#include "ruby/internal/compiler_is/intel.h"
+
+#if ! defined(__GNUC__)
+# define RBIMPL_COMPILER_IS_GCC 0
+
+#elif RBIMPL_COMPILER_IS(Apple)
+# define RBIMPL_COMPILER_IS_GCC 0
+
+#elif RBIMPL_COMPILER_IS(Clang)
+# define RBIMPL_COMPILER_IS_GCC 0
+
+#elif RBIMPL_COMPILER_IS(Intel)
+# define RBIMPL_COMPILER_IS_GCC 0
+
+#else
+# define RBIMPL_COMPILER_IS_GCC 1
+# define RBIMPL_COMPILER_VERSION_MAJOR __GNUC__
+# define RBIMPL_COMPILER_VERSION_MINOR __GNUC_MINOR__
+# define RBIMPL_COMPILER_VERSION_PATCH __GNUC_PATCHLEVEL__
+#endif
+
+#endif /* RBIMPL_COMPILER_IS_GCC_H */

libs/libruby/ruby/internal/compiler_is/intel.h

@@ -0,0 +1,40 @@
+#ifndef RBIMPL_COMPILER_IS_INTEL_H                   /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_COMPILER_IS_INTEL_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines RBIMPL_COMPILER_IS_Intel.
+ */
+#if ! defined(__INTEL_COMPILER)
+# define RBIMPL_COMPILER_IS_Intel 0
+
+#elif ! defined(__INTEL_COMPILER_UPDATE)
+# define RBIMPL_COMPILER_IS_Intel 1
+# /* __INTEL_COMPILER = XXYZ */
+# define RBIMPL_COMPILER_VERSION_MAJOR (__INTEL_COMPILER / 100)
+# define RBIMPL_COMPILER_VERSION_MINOR (__INTEL_COMPILER % 100 / 10)
+# define RBIMPL_COMPILER_VERSION_PATCH (__INTEL_COMPILER       % 10)
+
+#else
+# define RBIMPL_COMPILER_IS_Intel 1
+# /* __INTEL_COMPILER = XXYZ */
+# define RBIMPL_COMPILER_VERSION_MAJOR (__INTEL_COMPILER / 100)
+# define RBIMPL_COMPILER_VERSION_MINOR (__INTEL_COMPILER % 100 / 10)
+# define RBIMPL_COMPILER_VERSION_PATCH __INTEL_COMPILER_UPDATE
+#endif
+
+#endif /* RBIMPL_COMPILER_IS_INTEL_H */

libs/libruby/ruby/internal/compiler_is/msvc.h

@@ -0,0 +1,56 @@
+#ifndef RBIMPL_COMPILER_IS_MSVC_H                    /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_COMPILER_IS_MSVC_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines RBIMPL_COMPILER_IS_MSVC.
+ */
+#include "ruby/internal/compiler_is/clang.h"
+#include "ruby/internal/compiler_is/intel.h"
+
+#if ! defined(_MSC_VER)
+# define RBIMPL_COMPILER_IS_MSVC 0
+
+#elif RBIMPL_COMPILER_IS(Clang)
+# define RBIMPL_COMPILER_IS_MSVC 0
+
+#elif RBIMPL_COMPILER_IS(Intel)
+# define RBIMPL_COMPILER_IS_MSVC 0
+
+#elif _MSC_VER >= 1400
+# define RBIMPL_COMPILER_IS_MSVC 1
+# /* _MSC_FULL_VER = XXYYZZZZZ */
+# define RBIMPL_COMPILER_VERSION_MAJOR (_MSC_FULL_VER / 10000000)
+# define RBIMPL_COMPILER_VERSION_MINOR (_MSC_FULL_VER % 10000000 / 100000)
+# define RBIMPL_COMPILER_VERSION_PATCH (_MSC_FULL_VER            % 100000)
+
+#elif defined(_MSC_FULL_VER)
+# define RBIMPL_COMPILER_IS_MSVC 1
+# /* _MSC_FULL_VER = XXYYZZZZ */
+# define RBIMPL_COMPILER_VERSION_MAJOR (_MSC_FULL_VER / 1000000)
+# define RBIMPL_COMPILER_VERSION_MINOR (_MSC_FULL_VER % 1000000 / 10000)
+# define RBIMPL_COMPILER_VERSION_PATCH (_MSC_FULL_VER           % 10000)
+
+#else
+# define RBIMPL_COMPILER_IS_MSVC 1
+# /* _MSC_VER = XXYY */
+# define RBIMPL_COMPILER_VERSION_MAJOR (_MSC_VER / 100)
+# define RBIMPL_COMPILER_VERSION_MINOR (_MSC_VER % 100)
+# define RBIMPL_COMPILER_VERSION_PATCH 0
+#endif
+
+#endif /* RBIMPL_COMPILER_IS_MSVC_H */

libs/libruby/ruby/internal/compiler_is/sunpro.h

@@ -0,0 +1,54 @@
+#ifndef RBIMPL_COMPILER_IS_SUNPRO_H                  /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_COMPILER_IS_SUNPRO_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines RBIMPL_COMPILER_IS_SunPro.
+ */
+#if ! (defined(__SUNPRO_C) || defined(__SUNPRO_CC))
+# define RBIMPL_COMPILER_IS_SunPro 0
+
+#elif defined(__SUNPRO_C) && __SUNPRO_C >= 0x5100
+# define RBIMPL_COMPILER_IS_SunPro 1
+# /* __SUNPRO_C = 0xXYYZ */
+# define RBIMPL_COMPILER_VERSION_MAJOR  (__SUNPRO_C >> 12)
+# define RBIMPL_COMPILER_VERSION_MINOR ((__SUNPRO_C >> 8 & 0xF) * 10 + (__SUNPRO_C >> 4 & 0xF))
+# define RBIMPL_COMPILER_VERSION_PATCH  (__SUNPRO_C      & 0xF)
+
+#elif defined(__SUNPRO_CC) && __SUNPRO_CC >= 0x5100
+# define RBIMPL_COMPILER_IS_SunPro 1
+# /* __SUNPRO_CC = 0xXYYZ */
+# define RBIMPL_COMPILER_VERSION_MAJOR  (__SUNPRO_CC >> 12)
+# define RBIMPL_COMPILER_VERSION_MINOR ((__SUNPRO_CC >> 8 & 0xF) * 10 + (__SUNPRO_CC >> 4 & 0xF))
+# define RBIMPL_COMPILER_VERSION_PATCH  (__SUNPRO_CC      & 0xF)
+
+#elif defined(__SUNPRO_C)
+# define RBIMPL_COMPILER_IS_SunPro 1
+# /* __SUNPRO_C = 0xXYZ */
+# define RBIMPL_COMPILER_VERSION_MAJOR (__SUNPRO_C >> 8)
+# define RBIMPL_COMPILER_VERSION_MINOR (__SUNPRO_C >> 4 & 0xF)
+# define RBIMPL_COMPILER_VERSION_PATCH (__SUNPRO_C      & 0xF)
+
+#else
+# define RBIMPL_COMPILER_IS_SunPro 1
+# /* __SUNPRO_CC = 0xXYZ */
+# define RBIMPL_COMPILER_VERSION_MAJOR (__SUNPRO_CC >> 8)
+# define RBIMPL_COMPILER_VERSION_MINOR (__SUNPRO_CC >> 4 & 0xF)
+# define RBIMPL_COMPILER_VERSION_PATCH (__SUNPRO_CC      & 0xF)
+#endif
+
+#endif /* RBIMPL_COMPILER_IS_SUNPRO_H */

libs/libruby/ruby/internal/compiler_since.h

@@ -0,0 +1,61 @@
+#ifndef RBIMPL_COMPILER_SINCE_H                      /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_COMPILER_SINCE_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_COMPILER_SINCE.
+ */
+#include "ruby/internal/compiler_is.h"
+
+/**
+ * @brief   Checks if the compiler is of given brand and is newer than or equal
+ *          to the passed version.
+ * @param   cc     Compiler brand, like `MSVC`.
+ * @param   x      Major version.
+ * @param   y      Minor version.
+ * @param   z      Patchlevel.
+ * @retval  true   cc >= x.y.z.
+ * @retval  false  otherwise.
+ */
+#define RBIMPL_COMPILER_SINCE(cc, x, y, z)     \
+     (RBIMPL_COMPILER_IS(cc)                && \
+    ((RBIMPL_COMPILER_VERSION_MAJOR >  (x)) || \
+    ((RBIMPL_COMPILER_VERSION_MAJOR == (x)) && \
+    ((RBIMPL_COMPILER_VERSION_MINOR >  (y)) || \
+    ((RBIMPL_COMPILER_VERSION_MINOR == (y)) && \
+     (RBIMPL_COMPILER_VERSION_PATCH >= (z)))))))
+
+/**
+ * @brief   Checks if  the compiler  is of  given brand and  is older  than the
+ *          passed version.
+ * @param   cc     Compiler brand, like `MSVC`.
+ * @param   x      Major version.
+ * @param   y      Minor version.
+ * @param   z      Patchlevel.
+ * @retval  true   cc < x.y.z.
+ * @retval  false  otherwise.
+ */
+#define RBIMPL_COMPILER_BEFORE(cc, x, y, z)    \
+     (RBIMPL_COMPILER_IS(cc)                && \
+    ((RBIMPL_COMPILER_VERSION_MAJOR <  (x)) || \
+    ((RBIMPL_COMPILER_VERSION_MAJOR == (x)) && \
+    ((RBIMPL_COMPILER_VERSION_MINOR <  (y)) || \
+    ((RBIMPL_COMPILER_VERSION_MINOR == (y)) && \
+     (RBIMPL_COMPILER_VERSION_PATCH <  (z)))))))
+
+#endif /* RBIMPL_COMPILER_SINCE_H */

libs/libruby/ruby/internal/config.h

@@ -0,0 +1,155 @@
+#ifndef RBIMPL_CONFIG_H /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_CONFIG_H
+/**
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Thin wrapper to ruby/config.h
+ */
+#include "ruby/config.h"
+
+#ifdef RUBY_EXTCONF_H
+#include RUBY_EXTCONF_H
+#endif
+
+#include "ruby/internal/compiler_since.h"
+
+#undef HAVE_PROTOTYPES
+#define HAVE_PROTOTYPES 1
+
+#undef HAVE_STDARG_PROTOTYPES
+#define HAVE_STDARG_PROTOTYPES 1
+
+#undef TOKEN_PASTE
+#define TOKEN_PASTE(x, y) x##y
+
+#if defined(__cplusplus)
+#/* __builtin_choose_expr and __builtin_types_compatible aren't available
+# * on C++.  See https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html */
+#undef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P
+#undef HAVE_BUILTIN___BUILTIN_TYPES_COMPATIBLE_P
+
+/* HAVE_VA_ARGS_MACRO is for C.  C++ situations might be different. */
+#undef HAVE_VA_ARGS_MACRO
+#if __cplusplus >= 201103L
+#define HAVE_VA_ARGS_MACRO
+#elif defined(__GXX_EXPERIMENTAL_CXX0X__) && __GXX_EXPERIMENTAL_CXX0X__
+#define HAVE_VA_ARGS_MACRO
+#elif defined(__INTEL_CXX11_MODE__)
+#define HAVE_VA_ARGS_MACRO
+#elif RBIMPL_COMPILER_SINCE(MSVC, 16, 0, 0)
+#define HAVE_VA_ARGS_MACRO
+#else
+#/* NG, not known. */
+#endif
+#endif
+
+#if RBIMPL_COMPILER_BEFORE(GCC, 4, 9, 0)
+#/* See https://bugs.ruby-lang.org/issues/14221 */
+#undef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P
+#endif
+
+#if RBIMPL_COMPILER_BEFORE(GCC, 5, 0, 0)
+#/* GCC 4.9.2 reportedly has this feature  and is broken.  The function is not
+#  * officially documented below.  Seems we should not use it.
+#  * https://gcc.gnu.org/onlinedocs/gcc-4.9.4/gcc/Other-Builtins.html */
+#undef HAVE_BUILTIN___BUILTIN_ALLOCA_WITH_ALIGN
+#endif
+
+#if defined(__SUNPRO_CC)
+#/* Oracle  Developer Studio  12.5: GCC compatibility guide  says it  supports
+#  * statement expressions.   But to our  knowledge they support  the extension
+#  * only for C and not for C++.  Prove  me wrong.  Am happy to support them if
+#  * there is a way. */
+#undef HAVE_STMT_AND_DECL_IN_EXPR
+#endif
+
+#ifndef STRINGIZE0
+#define STRINGIZE(expr) STRINGIZE0(expr)
+#define STRINGIZE0(expr) #expr
+#endif
+
+#ifdef AC_APPLE_UNIVERSAL_BUILD
+#undef WORDS_BIGENDIAN
+#ifdef __BIG_ENDIAN__
+#define WORDS_BIGENDIAN
+#endif
+#endif
+
+#ifndef DLEXT_MAXLEN
+#define DLEXT_MAXLEN 4
+#endif
+
+#ifndef RUBY_PLATFORM
+#define RUBY_PLATFORM "unknown-unknown"
+#endif
+
+#ifdef UNALIGNED_WORD_ACCESS
+#/* Take that. */
+#elif defined(__i386)
+#define UNALIGNED_WORD_ACCESS 1
+#elif defined(__i386__)
+#define UNALIGNED_WORD_ACCESS 1
+#elif defined(_M_IX86)
+#define UNALIGNED_WORD_ACCESS 1
+#elif defined(__x86_64)
+#define UNALIGNED_WORD_ACCESS 1
+#elif defined(__x86_64__)
+#define UNALIGNED_WORD_ACCESS 1
+#elif defined(_M_AMD64)
+#define UNALIGNED_WORD_ACCESS 1
+#elif defined(__powerpc64__)
+#define UNALIGNED_WORD_ACCESS 1
+#elif defined(__POWERPC__) // __POWERPC__ is defined for ppc and ppc64 on Darwin
+#define UNALIGNED_WORD_ACCESS 1
+#elif defined(__aarch64__)
+#define UNALIGNED_WORD_ACCESS 1
+#elif defined(__mc68020__)
+#define UNALIGNED_WORD_ACCESS 1
+#else
+#define UNALIGNED_WORD_ACCESS 0
+#endif
+
+/* Detection of __VA_OPT__ */
+#if !defined(HAVE_VA_ARGS_MACRO)
+#undef HAVE___VA_OPT__
+
+#elif defined(__cplusplus)
+#if __cplusplus > 201703L
+#define HAVE___VA_OPT__
+#else
+#undef HAVE___VA_OPT__
+#endif
+#else
+#/* Idea taken from: https://stackoverflow.com/a/48045656 */
+#define RBIMPL_TEST3(q, w, e, ...) e
+#define RBIMPL_TEST2(...) RBIMPL_TEST3(__VA_OPT__(, ), 1, 0, 0)
+#define RBIMPL_TEST1() RBIMPL_TEST2("ruby")
+#if RBIMPL_TEST1()
+#define HAVE___VA_OPT__
+#else
+#undef HAVE___VA_OPT__
+#endif
+#undef RBIMPL_TEST1
+#undef RBIMPL_TEST2
+#undef RBIMPL_TEST3
+#endif /* HAVE_VA_ARGS_MACRO */
+
+#ifndef USE_RVARGC
+#define USE_RVARGC 1
+#endif
+
+#endif /* RBIMPL_CONFIG_H */

libs/libruby/ruby/internal/constant_p.h

@@ -0,0 +1,38 @@
+#ifndef RBIMPL_CONSTANT_P_H                          /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_CONSTANT_P_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines #RBIMPL_CONSTANT_P.
+ *
+ * Note that __builtin_constant_p can be applicable inside of inline functions,
+ * according to GCC manual.  Clang lacks that feature, though.
+ *
+ * @see https://bugs.llvm.org/show_bug.cgi?id=4898
+ * @see https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html
+ */
+#include "ruby/internal/has/builtin.h"
+
+/** Wraps (or simulates) `__builtin_constant_p` */
+#if RBIMPL_HAS_BUILTIN(__builtin_constant_p)
+# define RBIMPL_CONSTANT_P(expr) __builtin_constant_p(expr)
+#else
+# define RBIMPL_CONSTANT_P(expr) 0
+#endif
+
+#endif /* RBIMPL_CONSTANT_P_H */

libs/libruby/ruby/internal/core.h

@@ -0,0 +1,35 @@
+#ifndef RBIMPL_CORE_H                                /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_CORE_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Core data structures, definitions and manipulations.
+ */
+#include "ruby/internal/core/rarray.h"
+#include "ruby/internal/core/rbasic.h"
+#include "ruby/internal/core/rbignum.h"
+#include "ruby/internal/core/rclass.h"
+#include "ruby/internal/core/rdata.h"
+#include "ruby/internal/core/rfile.h"
+#include "ruby/internal/core/rhash.h"
+#include "ruby/internal/core/robject.h"
+#include "ruby/internal/core/rregexp.h"
+#include "ruby/internal/core/rstring.h"
+#include "ruby/internal/core/rstruct.h"
+#include "ruby/internal/core/rtypeddata.h"
+#endif /* RBIMPL_CORE_H */

libs/libruby/ruby/internal/core/rarray.h

@@ -0,0 +1,585 @@
+#ifndef RBIMPL_RARRAY_H                              /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_RARRAY_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines struct ::RArray.
+ */
+#include "ruby/internal/arithmetic/long.h"
+#include "ruby/internal/attr/artificial.h"
+#include "ruby/internal/attr/constexpr.h"
+#include "ruby/internal/attr/maybe_unused.h"
+#include "ruby/internal/attr/pure.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/core/rbasic.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/fl_type.h"
+#include "ruby/internal/rgengc.h"
+#include "ruby/internal/stdbool.h"
+#include "ruby/internal/value.h"
+#include "ruby/internal/value_type.h"
+#include "ruby/assert.h"
+
+/**
+ * @private
+ * @warning  Do not touch this macro.
+ * @warning  It is an implementation detail.
+ * @warning  The  value of  this  macro  must match  for  ruby  itself and  all
+ *           extension  libraries, otherwise  serious  memory corruption  shall
+ *           occur.
+ */
+#ifndef USE_TRANSIENT_HEAP
+# define USE_TRANSIENT_HEAP 1
+#endif
+
+/**
+ * Convenient casting macro.
+ *
+ * @param   obj  An object, which is in fact an ::RArray.
+ * @return  The passed object casted to ::RArray.
+ */
+#define RARRAY(obj)            RBIMPL_CAST((struct RArray *)(obj))
+/** @cond INTERNAL_MACRO */
+#define RARRAY_EMBED_FLAG      RARRAY_EMBED_FLAG
+#define RARRAY_EMBED_LEN_MASK  RARRAY_EMBED_LEN_MASK
+#define RARRAY_EMBED_LEN_MAX   RARRAY_EMBED_LEN_MAX
+#define RARRAY_EMBED_LEN_SHIFT RARRAY_EMBED_LEN_SHIFT
+#if USE_TRANSIENT_HEAP
+# define RARRAY_TRANSIENT_FLAG RARRAY_TRANSIENT_FLAG
+#else
+# define RARRAY_TRANSIENT_FLAG 0
+#endif
+/** @endcond */
+#define RARRAY_LEN                 rb_array_len                 /**< @alias{rb_array_len} */
+#define RARRAY_CONST_PTR           rb_array_const_ptr           /**< @alias{rb_array_const_ptr} */
+#define RARRAY_CONST_PTR_TRANSIENT rb_array_const_ptr_transient /**< @alias{rb_array_const_ptr_transient} */
+
+/** @cond INTERNAL_MACRO */
+#if defined(__fcc__) || defined(__fcc_version) || \
+    defined(__FCC__) || defined(__FCC_VERSION)
+/* workaround for old version of Fujitsu C Compiler (fcc) */
+# define FIX_CONST_VALUE_PTR(x) ((const VALUE *)(x))
+#else
+# define FIX_CONST_VALUE_PTR(x) (x)
+#endif
+
+#define RARRAY_EMBED_LEN   RARRAY_EMBED_LEN
+#define RARRAY_LENINT      RARRAY_LENINT
+#define RARRAY_TRANSIENT_P RARRAY_TRANSIENT_P
+#define RARRAY_ASET        RARRAY_ASET
+#define RARRAY_PTR         RARRAY_PTR
+/** @endcond */
+
+/**
+ * @private
+ *
+ * Bits that you can set to ::RBasic::flags.
+ *
+ * @warning  These enums are not the only bits we use for arrays.
+ *
+ * @internal
+ *
+ * Unlike  strings, flag  usages for  arrays  are scattered  across the  entire
+ * source codes.  @shyouhei doesn't know the complete list.  But what is listed
+ * here is at least incomplete.
+ */
+enum ruby_rarray_flags {
+    /**
+     * This flag  has something to do  with memory footprint.  If  the array is
+     * "small"  enough, ruby  tries to  be creative  to abuse  padding bits  of
+     * struct  ::RArray  for storing  its  contents.   This flag  denotes  that
+     * situation.
+     *
+     * @warning  This  bit has  to be  considered read-only.   Setting/clearing
+     *           this  bit without  corresponding fix  up must  cause immediate
+     *           SEGV.    Also,  internal   structures  of   an  array   change
+     *           dynamically  and  transparently  throughout of  its  lifetime.
+     *           Don't assume it being persistent.
+     *
+     * @internal
+     *
+     * 3rd parties must  not be aware that  there even is more than  one way to
+     * store array elements.  It was a bad idea to expose this to them.
+     */
+    RARRAY_EMBED_FLAG      = RUBY_FL_USER1,
+
+    /* RUBY_FL_USER2 is for ELTS_SHARED */
+
+    /**
+     * When an array employs embedded strategy (see ::RARRAY_EMBED_FLAG), these
+     * bits  are used  to store  the number  of elements  actually filled  into
+     * ::RArray::ary.
+     *
+     * @internal
+     *
+     * 3rd parties must  not be aware that  there even is more than  one way to
+     * store array elements.  It was a bad idea to expose this to them.
+     */
+#if USE_RVARGC
+    RARRAY_EMBED_LEN_MASK  = RUBY_FL_USER9 | RUBY_FL_USER8 | RUBY_FL_USER7 | RUBY_FL_USER6 |
+                                 RUBY_FL_USER5 | RUBY_FL_USER4 | RUBY_FL_USER3
+#else
+    RARRAY_EMBED_LEN_MASK  = RUBY_FL_USER4 | RUBY_FL_USER3
+#endif
+
+#if USE_TRANSIENT_HEAP
+    ,
+
+    /**
+     * This flag has something to do with an array's "transiency".  A transient
+     * array is an  array of young generation (of generational  GC), who stores
+     * its elements inside  of dedicated memory pages called  a transient heap.
+     * Not  every  young  generation  share  that  storage  scheme,  but  elder
+     * generations must no join.
+     *
+     * @internal
+     *
+     * 3rd parties must  not be aware that  there even is more than  one way to
+     * store array elements.  It was a bad idea to expose this to them.
+     */
+    RARRAY_TRANSIENT_FLAG  = RUBY_FL_USER13
+#endif
+};
+
+/**
+ * This is an enum because GDB wants it (rather than a macro).  People need not
+ * bother.
+ */
+enum ruby_rarray_consts {
+    /** Where ::RARRAY_EMBED_LEN_MASK resides. */
+    RARRAY_EMBED_LEN_SHIFT = RUBY_FL_USHIFT + 3
+
+#if !USE_RVARGC
+    ,
+
+    /** Max possible number elements that can be embedded. */
+    RARRAY_EMBED_LEN_MAX   = RBIMPL_EMBED_LEN_MAX_OF(VALUE)
+#endif
+};
+
+/** Ruby's array. */
+struct RArray {
+
+    /** Basic part, including flags and class. */
+    struct RBasic basic;
+
+    /** Array's specific fields. */
+    union {
+
+        /**
+         * Arrays  that  use separated  memory  region  for elements  use  this
+         * pattern.
+         */
+        struct {
+
+            /** Number of elements of the array. */
+            long len;
+
+            /** Auxiliary info. */
+            union {
+
+                /**
+                 * Capacity of `*ptr`.  A continuous  memory region of at least
+                 * `capa` elements is expected to exist at `*ptr`.  This can be
+                 * bigger than `len`.
+                 */
+                long capa;
+
+                /**
+                 * Parent  of  the  array.   Nowadays arrays  can  share  their
+                 * backend  memory regions  each  other, constructing  gigantic
+                 * nest  of objects.   This situation  is called  "shared", and
+                 * this is the field to control such properties.
+                 */
+#if defined(__clang__)      /* <- clang++ is sane */ || \
+    !defined(__cplusplus)   /* <- C99 is sane */     || \
+    (__cplusplus > 199711L) /* <- C++11 is sane */
+                const
+#endif
+                VALUE shared_root;
+            } aux;
+
+            /**
+             * Pointer to the C array that holds the elements of the array.  In
+             * the old days  each array had dedicated memory  regions.  That is
+             * no  longer  true today,  but  there  still  are arrays  of  such
+             * properties.  This field could be used to point such things.
+             */
+            const VALUE *ptr;
+        } heap;
+
+        /**
+         * Embedded elements.  When an array is short enough, it uses this area
+         * to store its elements.  In this  case the length is encoded into the
+         * flags.
+         */
+#if USE_RVARGC
+        /* This is a length 1 array because:
+         *   1. GCC has a bug that does not optimize C flexible array members
+         *      (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102452)
+         *   2. Zero length arrays are not supported by all compilers
+         */
+        const VALUE ary[1];
+#else
+        const VALUE ary[RARRAY_EMBED_LEN_MAX];
+#endif
+    } as;
+};
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+/**
+ * @private
+ *
+ * Declares  a  section of  code  where  raw pointers  are  used.   This is  an
+ * implementation detail of #RARRAY_PTR_USE.  People don't use it directly.
+ *
+ * @param[in]  ary  An object of ::RArray.
+ * @return     `ary`'s backend C array.
+ */
+VALUE *rb_ary_ptr_use_start(VALUE ary);
+
+/**
+ * @private
+ *
+ * Declares an  end of  a section  formerly started  by rb_ary_ptr_use_start().
+ * This is  an implementation detail  of #RARRAY_PTR_USE.  People don't  use it
+ * directly.
+ *
+ * @param[in]  a  An object of ::RArray.
+ */
+void rb_ary_ptr_use_end(VALUE a);
+
+#if USE_TRANSIENT_HEAP
+/**
+ * Destructively converts an array of transient backend into ordinal one.
+ *
+ * @param[out]  a  An object of ::RArray.
+ * @pre         `a` must be a transient array.
+ * @post        `a` gets out of transient heap, destructively.
+ */
+void rb_ary_detransient(VALUE a);
+#endif
+RBIMPL_SYMBOL_EXPORT_END()
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Queries the length of the array.
+ *
+ * @param[in]  ary  Array in question.
+ * @return     Its number of elements.
+ * @pre        `ary`  must  be  an  instance  of ::RArray,  and  must  has  its
+ *             ::RARRAY_EMBED_FLAG flag set.
+ *
+ * @internal
+ *
+ * This was a macro  before.  It was inevitable to be  public, since macros are
+ * global constructs.   But should it be  forever?  Now that it  is a function,
+ * @shyouhei thinks  it could  just be  eliminated, hidden  into implementation
+ * details.
+ */
+static inline long
+RARRAY_EMBED_LEN(VALUE ary)
+{
+    RBIMPL_ASSERT_TYPE(ary, RUBY_T_ARRAY);
+    RBIMPL_ASSERT_OR_ASSUME(RB_FL_ANY_RAW(ary, RARRAY_EMBED_FLAG));
+
+    VALUE f = RBASIC(ary)->flags;
+    f &= RARRAY_EMBED_LEN_MASK;
+    f >>= RARRAY_EMBED_LEN_SHIFT;
+    return RBIMPL_CAST((long)f);
+}
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+/**
+ * Queries the length of the array.
+ *
+ * @param[in]  a  Array in question.
+ * @return     Its number of elements.
+ * @pre        `a` must be an instance of ::RArray.
+ */
+static inline long
+rb_array_len(VALUE a)
+{
+    RBIMPL_ASSERT_TYPE(a, RUBY_T_ARRAY);
+
+    if (RB_FL_ANY_RAW(a, RARRAY_EMBED_FLAG)) {
+        return RARRAY_EMBED_LEN(a);
+    }
+    else {
+        return RARRAY(a)->as.heap.len;
+    }
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Identical to rb_array_len(), except it differs for the return type.
+ *
+ * @param[in]  ary             Array in question.
+ * @exception  rb_eRangeError  Too long.
+ * @return     Its number of elements.
+ * @pre        `ary` must be an instance of ::RArray.
+ *
+ * @internal
+ *
+ * This API seems redundant but has actual usages.
+ */
+static inline int
+RARRAY_LENINT(VALUE ary)
+{
+    return rb_long2int(RARRAY_LEN(ary));
+}
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Queries if the array is a transient array.
+ *
+ * @param[in]  ary    Array in question.
+ * @retval     true   Yes it is.
+ * @retval     false  No it isn't.
+ * @pre        `ary` must be an instance of ::RArray.
+ *
+ * @internal
+ *
+ * @shyouhei  doesn't  understand the  benefit  of  this function  called  from
+ * extension libraries.
+ */
+static inline bool
+RARRAY_TRANSIENT_P(VALUE ary)
+{
+    RBIMPL_ASSERT_TYPE(ary, RUBY_T_ARRAY);
+
+#if USE_TRANSIENT_HEAP
+    return RB_FL_ANY_RAW(ary, RARRAY_TRANSIENT_FLAG);
+#else
+    return false;
+#endif
+}
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+/**
+ * @private
+ *
+ * This is  an implementation  detail of  RARRAY_PTR().  People  do not  use it
+ * directly.
+ *
+ * @param[in]  a  An object of ::RArray.
+ * @return     Its backend storage.
+ */
+static inline const VALUE *
+rb_array_const_ptr_transient(VALUE a)
+{
+    RBIMPL_ASSERT_TYPE(a, RUBY_T_ARRAY);
+
+    if (RB_FL_ANY_RAW(a, RARRAY_EMBED_FLAG)) {
+        return FIX_CONST_VALUE_PTR(RARRAY(a)->as.ary);
+    }
+    else {
+        return FIX_CONST_VALUE_PTR(RARRAY(a)->as.heap.ptr);
+    }
+}
+
+#if ! USE_TRANSIENT_HEAP
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+#endif
+/**
+ * @private
+ *
+ * This is  an implementation  detail of  RARRAY_PTR().  People  do not  use it
+ * directly.
+ *
+ * @param[in]  a  An object of ::RArray.
+ * @return     Its backend storage.
+ * @post       `a` is not a transient array.
+ */
+static inline const VALUE *
+rb_array_const_ptr(VALUE a)
+{
+    RBIMPL_ASSERT_TYPE(a, RUBY_T_ARRAY);
+
+#if USE_TRANSIENT_HEAP
+    if (RARRAY_TRANSIENT_P(a)) {
+        rb_ary_detransient(a);
+    }
+#endif
+    return rb_array_const_ptr_transient(a);
+}
+
+/**
+ * @private
+ *
+ * This is an  implementation detail of #RARRAY_PTR_USE.  People do  not use it
+ * directly.
+ *
+ * @param[in]  a                An object of ::RArray.
+ * @param[in]  allow_transient  Whether `a` can be transient or not.
+ * @return     Its backend storage.
+ * @post       `a` is not a transient array unless `allow_transient`.
+ */
+static inline VALUE *
+rb_array_ptr_use_start(VALUE a,
+                       RBIMPL_ATTR_MAYBE_UNUSED()
+                       int allow_transient)
+{
+    RBIMPL_ASSERT_TYPE(a, RUBY_T_ARRAY);
+
+#if USE_TRANSIENT_HEAP
+    if (!allow_transient) {
+        if (RARRAY_TRANSIENT_P(a)) {
+            rb_ary_detransient(a);
+        }
+    }
+#endif
+
+    return rb_ary_ptr_use_start(a);
+}
+
+/**
+ * @private
+ *
+ * This is an  implementation detail of #RARRAY_PTR_USE.  People do  not use it
+ * directly.
+ *
+ * @param[in]  a                An object of ::RArray.
+ * @param[in]  allow_transient  Whether `a` can be transient or not.
+ */
+static inline void
+rb_array_ptr_use_end(VALUE a,
+                     RBIMPL_ATTR_MAYBE_UNUSED()
+                     int allow_transient)
+{
+    RBIMPL_ASSERT_TYPE(a, RUBY_T_ARRAY);
+    rb_ary_ptr_use_end(a);
+}
+
+/**
+ * @private
+ *
+ * This is an  implementation detail of #RARRAY_PTR_USE.  People do  not use it
+ * directly.
+ */
+#define RBIMPL_RARRAY_STMT(flag, ary, var, expr) do {        \
+    RBIMPL_ASSERT_TYPE((ary), RUBY_T_ARRAY);                 \
+    const VALUE rbimpl_ary = (ary);                          \
+    VALUE *var = rb_array_ptr_use_start(rbimpl_ary, (flag)); \
+    expr;                                                   \
+    rb_array_ptr_use_end(rbimpl_ary, (flag));                \
+} while (0)
+
+/**
+ * @private
+ *
+ * This is an  implementation detail of #RARRAY_PTR_USE.  People do  not use it
+ * directly.
+ */
+#define RARRAY_PTR_USE_END(a) rb_array_ptr_use_end(a, 0)
+
+/**
+ * Declares a section of code where raw pointers are used.  In case you need to
+ * touch the raw C array instead of  polite CAPIs, then that operation shall be
+ * wrapped using this macro.
+ *
+ * ```CXX
+ * const auto ary = rb_eval_string("[...]");
+ * const auto len = RARRAY_LENINT(ary);
+ * const auto symwrite = rb_intern("write");
+ *
+ * RARRAY_PTR_USE(ary, ptr, {
+ *     rb_funcallv(rb_stdout, symwrite, len, ptr);
+ * });
+ * ```
+ *
+ * @param  ary       An object of ::RArray.
+ * @param  ptr_name  A variable name which points the C array in `expr`.
+ * @param  expr      The expression that touches `ptr_name`.
+ *
+ * @internal
+ *
+ * For  historical reasons  use  of  this macro  is  not  enforced.  There  are
+ * extension libraries in the wild which call RARRAY_PTR() without it.  We want
+ * them use it...  Maybe some transition path can be implemented later.
+ */
+#define RARRAY_PTR_USE(ary, ptr_name, expr)     \
+    RBIMPL_RARRAY_STMT(0, ary, ptr_name, expr)
+
+/**
+ * Identical to #RARRAY_PTR_USE, except the pointer can be a transient one.
+ *
+ * @param  ary       An object of ::RArray.
+ * @param  ptr_name  A variable name which points the C array in `expr`.
+ * @param  expr      The expression that touches `ptr_name`.
+ */
+#define RARRAY_PTR_USE_TRANSIENT(ary, ptr_name, expr)   \
+    RBIMPL_RARRAY_STMT(1, ary, ptr_name, expr)
+
+/**
+ * Wild  use of  a  C  pointer.  This  function  accesses  the backend  storage
+ * directly.   This is  slower  than  #RARRAY_PTR_USE_TRANSIENT.  It  exercises
+ * extra manoeuvres  to protect our generational  GC.  Use of this  function is
+ * considered archaic.  Use a modern way instead.
+ *
+ * @param[in]  ary  An object of ::RArray.
+ * @return     The backend C array.
+ *
+ * @internal
+ *
+ * That said...  there are  extension libraries  in the wild  who uses  it.  We
+ * cannot but continue supporting.
+ */
+static inline VALUE *
+RARRAY_PTR(VALUE ary)
+{
+    RBIMPL_ASSERT_TYPE(ary, RUBY_T_ARRAY);
+
+    VALUE tmp = RB_OBJ_WB_UNPROTECT_FOR(ARRAY, ary);
+    return RBIMPL_CAST((VALUE *)RARRAY_CONST_PTR(tmp));
+}
+
+/**
+ * Assigns an object in an array.
+ *
+ * @param[out]  ary  Destination array object.
+ * @param[in]   i    Index of `ary`.
+ * @param[in]   v    Arbitrary ruby object.
+ * @pre         `ary` must be an instance of ::RArray.
+ * @pre         `ary`'s length must be longer than or equal to `i`.
+ * @pre         `i` must be greater than or equal to zero.
+ * @post        `ary`'s `i`th element is set to `v`.
+ */
+static inline void
+RARRAY_ASET(VALUE ary, long i, VALUE v)
+{
+    RARRAY_PTR_USE_TRANSIENT(ary, ptr,
+        RB_OBJ_WRITE(ary, &ptr[i], v));
+}
+
+/**
+ * @deprecated
+ *
+ * :FIXME: we want to convert RARRAY_AREF into an inline function (to add rooms
+ * for more sanity checks).  However there were situations where the address of
+ * this macro is taken i.e. &RARRAY_AREF(...).  They cannot be possible if this
+ * is not a  macro.  Such usages are abuse, and  we eliminated them internally.
+ * However we are afraid  of similar things to remain in  the wild.  This macro
+ * remains as  it is due to  that.  If we could  warn such usages we  can set a
+ * transition path, but currently no way is found to do so.
+ */
+#define RARRAY_AREF(a, i) RARRAY_CONST_PTR_TRANSIENT(a)[i]
+
+#endif /* RBIMPL_RARRAY_H */

libs/libruby/ruby/internal/core/rbasic.h

@@ -0,0 +1,158 @@
+#ifndef RBIMPL_RBASIC_H                              /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_RBASIC_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines struct ::RBasic.
+ */
+#include "ruby/internal/attr/artificial.h"
+#include "ruby/internal/attr/constexpr.h"
+#include "ruby/internal/attr/forceinline.h"
+#include "ruby/internal/attr/noalias.h"
+#include "ruby/internal/attr/pure.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/special_consts.h"
+#include "ruby/internal/value.h"
+#include "ruby/assert.h"
+
+/**
+ * Convenient casting macro.
+ *
+ * @param   obj  Arbitrary Ruby object.
+ * @return  The passed object casted to ::RBasic.
+ */
+#define RBASIC(obj)                 RBIMPL_CAST((struct RBasic *)(obj))
+/** @cond INTERNAL_MACRO */
+#define RBASIC_CLASS                RBASIC_CLASS
+#define RBIMPL_RVALUE_EMBED_LEN_MAX 3
+#define RVALUE_EMBED_LEN_MAX        RVALUE_EMBED_LEN_MAX
+#define RBIMPL_EMBED_LEN_MAX_OF(T) \
+    RBIMPL_CAST((int)(sizeof(VALUE[RBIMPL_RVALUE_EMBED_LEN_MAX]) / (sizeof(T))))
+/** @endcond */
+
+/**
+ * This is an enum because GDB wants it (rather than a macro).  People need not
+ * bother.
+ */
+enum ruby_rvalue_flags {
+    /** Max possible number of objects that can be embedded. */
+    RVALUE_EMBED_LEN_MAX = RBIMPL_RVALUE_EMBED_LEN_MAX
+};
+
+/**
+ * Ruby's object's,  base components.  Every  single ruby objects have  them in
+ * common.
+ */
+struct
+RUBY_ALIGNAS(SIZEOF_VALUE)
+RBasic {
+
+    /**
+     * Per-object  flags.  Each  ruby  objects have  their own  characteristics
+     * apart from their  classes.  For instance whether an object  is frozen or
+     * not is not  controlled by its class.  This is  where such properties are
+     * stored.
+     *
+     * @see enum ::ruby_fl_type
+     *
+     * @note  This is ::VALUE rather than  an enum for alignment purpose.  Back
+     *        in the 1990s there were no such thing like `_Alignas` in C.
+     */
+    VALUE flags;
+
+    /**
+     * Class of an object.  Every object has its class.  Also, everything is an
+     * object  in Ruby.   This means  classes are  also objects.   Classes have
+     * their own classes,  classes of classes have their classes,  too ...  and
+     * it recursively continues forever.
+     *
+     * Also note the `const` qualifier.  In  ruby an object cannot "change" its
+     * class.
+     */
+    const VALUE klass;
+
+#ifdef __cplusplus
+  public:
+    RBIMPL_ATTR_CONSTEXPR(CXX11)
+    RBIMPL_ATTR_ARTIFICIAL()
+    RBIMPL_ATTR_FORCEINLINE()
+    RBIMPL_ATTR_NOALIAS()
+    /**
+     * We need to define this explicit constructor because the field `klass` is
+     * const-qualified above,  which effectively  defines the  implicit default
+     * constructor as "deleted"  (as of C++11) --  No way but to  define one by
+     * ourselves.
+     */
+    RBasic() :
+        flags(RBIMPL_VALUE_NULL),
+        klass(RBIMPL_VALUE_NULL)
+    {
+    }
+#endif
+};
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+/**
+ * Make the object invisible from Ruby code.
+ *
+ * It is  useful to let  Ruby's GC manage your  internal data structure  -- The
+ * object keeps being managed by GC, but `ObjectSpace.each_object` never yields
+ * the object.
+ *
+ * Note that the object also lose a way to call a method on it.
+ *
+ * @param[out]  obj  A Ruby object.
+ * @return      The passed object.
+ * @post        The object is destructively modified to be invisible.
+ * @see         rb_obj_reveal
+ */
+VALUE rb_obj_hide(VALUE obj);
+
+/**
+ * Make a hidden object visible again.
+ *
+ * It is  the caller's  responsibility to  pass the  right `klass`  which `obj`
+ * originally used to belong to.
+ *
+ * @param[out]  obj    A Ruby object.
+ * @param[in]   klass  Class of `obj`.
+ * @return      Passed `obj`.
+ * @pre         `obj` was previously hidden.
+ * @post        `obj`'s class is `klass`.
+ * @see         rb_obj_hide
+ */
+VALUE rb_obj_reveal(VALUE obj, VALUE klass); /* do not use this API to change klass information */
+RBIMPL_SYMBOL_EXPORT_END()
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Queries the class of an object.
+ *
+ * @param[in]  obj  An object.
+ * @return     Its class.
+ */
+static inline VALUE
+RBASIC_CLASS(VALUE obj)
+{
+    RBIMPL_ASSERT_OR_ASSUME(! RB_SPECIAL_CONST_P(obj));
+    return RBASIC(obj)->klass;
+}
+
+#endif /* RBIMPL_RBASIC_H */

libs/libruby/ruby/internal/core/rbignum.h

@@ -0,0 +1,80 @@
+#ifndef RBIMPL_RBIGNUM_H                             /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_RBIGNUM_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Routines to manipulate struct RBignum.
+ * @note       The struct RBignum itself is opaque.
+ */
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/value.h"
+#include "ruby/internal/value_type.h"
+#include "ruby/internal/stdbool.h"
+
+#define RBIGNUM_SIGN rb_big_sign /**< @alias{rb_big_sign} */
+
+/** @cond INTERNAL_MACRO */
+#define RBIGNUM_POSITIVE_P RBIGNUM_POSITIVE_P
+#define RBIGNUM_NEGATIVE_P RBIGNUM_NEGATIVE_P
+/** @endcond */
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+/**
+ * The "sign" of a bignum.
+ *
+ * @param[in]  num  An object of RBignum.
+ * @retval     1    It is greater than or equal to zero.
+ * @retval     0    It is less than zero.
+ *
+ * @internal
+ *
+ * Implementation wise, unlike fixnums (which  are 2's complement), bignums are
+ * signed  magnitude  system.   Theoretically  it could  be  possible  to  have
+ * negative zero  instances.  But  in reality  there is no  way to  create such
+ * thing.  Nobody ever needed that kind of insanity.
+ */
+int rb_big_sign(VALUE num);
+RBIMPL_SYMBOL_EXPORT_END()
+
+/**
+ * Checks if the bignum is positive.
+ * @param[in]  b      An object of RBignum.
+ * @retval     false  `b` is less than zero.
+ * @retval     true   Otherwise.
+ */
+static inline bool
+RBIGNUM_POSITIVE_P(VALUE b)
+{
+    RBIMPL_ASSERT_TYPE(b, RUBY_T_BIGNUM);
+    return RBIGNUM_SIGN(b);
+}
+
+/**
+ * Checks if the bignum is negative.
+ * @param[in]  b      An object of RBignum.
+ * @retval     true   `b` is less than zero.
+ * @retval     false  Otherwise.
+ */
+static inline bool
+RBIGNUM_NEGATIVE_P(VALUE b)
+{
+    RBIMPL_ASSERT_TYPE(b, RUBY_T_BIGNUM);
+    return ! RBIGNUM_POSITIVE_P(b);
+}
+
+#endif /* RBIMPL_RBIGNUM_H */

libs/libruby/ruby/internal/core/rclass.h

@@ -0,0 +1,93 @@
+#ifndef RBIMPL_RCLASS_H                              /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_RCLASS_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Routines to manipulate struct RClass.
+ * @note       The struct RClass itself is opaque.
+ */
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/value.h"
+#include "ruby/internal/cast.h"
+
+/** @cond INTERNAL_MACRO */
+#define RMODULE_IS_REFINEMENT            RMODULE_IS_REFINEMENT
+/** @endcond */
+
+/**
+ * Convenient casting macro.
+ *
+ * @param   obj  An object, which is in fact an RClass.
+ * @return  The passed object casted to RClass.
+ */
+#define RCLASS(obj)  RBIMPL_CAST((struct RClass *)(obj))
+
+/** @alias{RCLASS} */
+#define RMODULE      RCLASS
+
+/** @alias{rb_class_get_superclass} */
+#define RCLASS_SUPER rb_class_get_superclass
+
+/**
+ * @private
+ *
+ * Bits that you can set to ::RBasic::flags.
+ *
+ * @internal
+ *
+ * Why is it here, given RClass itself is not?
+ */
+enum ruby_rmodule_flags {
+    /**
+     * This flag has something to do  with refinements.  A module created using
+     * rb_mod_refine()  has this  flag set.   This  is the  bit which  controls
+     * difference between normal inclusion versus refinements.
+     */
+    RMODULE_IS_REFINEMENT            = RUBY_FL_USER3
+};
+
+struct RClass; /* Opaque, declared here for RCLASS() macro. */
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+/**
+ * Returns the superclass of a class.
+ * @param[in]  klass        An object of RClass.
+ * @retval     RUBY_Qfalse  `klass` has no super class.
+ * @retval     otherwise    Raw superclass of `klass`
+ * @see        rb_class_superclass
+ *
+ * ### Q&A ###
+ *
+ * - Q: How can a class have no super class?
+ *
+ * - A: `klass` could be a module.  Or it could be ::rb_cBasicObject.
+ *
+ * - Q: What do you mean by "raw" superclass?
+ *
+ * - A: This  is a  really good  question.  The  answer is  that this  function
+ *      returns something  different from what  you would normally  expect.  On
+ *      occasions  ruby  inserts  hidden  classes   in  a  hierarchy  of  class
+ *      inheritance behind-the-scene.   Such classes are called  "iclass"es and
+ *      distinguished  using  ::RUBY_T_ICLASS  in  C  level.   They  are  truly
+ *      transparent from Ruby  level but can be accessed from  C, by using this
+ *      API.
+ */
+VALUE rb_class_get_superclass(VALUE klass);
+RBIMPL_SYMBOL_EXPORT_END()
+
+#endif /* RBIMPL_RCLASS_H */

libs/libruby/ruby/internal/core/rdata.h

@@ -0,0 +1,386 @@
+#ifndef RBIMPL_RDATA_H                               /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_RDATA_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines struct ::RData.
+ */
+#include "ruby/internal/config.h"
+
+#ifdef STDC_HEADERS
+# include <stddef.h>
+#endif
+
+#include "ruby/internal/attr/deprecated.h"
+#include "ruby/internal/attr/warning.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/core/rbasic.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/fl_type.h"
+#include "ruby/internal/value.h"
+#include "ruby/internal/value_type.h"
+#include "ruby/defines.h"
+
+/** @cond INTERNAL_MACRO */
+#ifdef RUBY_UNTYPED_DATA_WARNING
+# /* Take that. */
+#elif defined(RUBY_EXPORT)
+# define RUBY_UNTYPED_DATA_WARNING 1
+#else
+# define RUBY_UNTYPED_DATA_WARNING 0
+#endif
+
+#define RBIMPL_DATA_FUNC(f) RBIMPL_CAST((void (*)(void *))(f))
+#define RBIMPL_ATTRSET_UNTYPED_DATA_FUNC() \
+    RBIMPL_ATTR_WARNING(("untyped Data is unsafe; use TypedData instead")) \
+    RBIMPL_ATTR_DEPRECATED(("by TypedData"))
+
+#define RBIMPL_MACRO_SELECT(x, y) x ## y
+#define RUBY_MACRO_SELECT(x, y)   RBIMPL_MACRO_SELECT(x, y)
+/** @endcond */
+
+/**
+ * Convenient casting macro.
+ *
+ * @param   obj  An object, which is in fact an ::RData.
+ * @return  The passed object casted to ::RData.
+ */
+#define RDATA(obj)                RBIMPL_CAST((struct RData *)(obj))
+
+/**
+ * Convenient getter macro.
+ *
+ * @param   obj  An object, which is in fact an ::RData.
+ * @return  The passed object's ::RData::data field.
+ */
+#define DATA_PTR(obj)             RDATA(obj)->data
+
+/**
+ * This is a value you can set  to ::RData::dfree.  Setting this means the data
+ * was allocated using ::ruby_xmalloc() (or variants), and shall be freed using
+ * ::ruby_xfree().
+ *
+ * @warning  Do not  use this  if you  want to use  system malloc,  because the
+ *           system  and  Ruby  might  or  might  not  share  the  same  malloc
+ *           implementation.
+ */
+#define RUBY_DEFAULT_FREE         RBIMPL_DATA_FUNC(-1)
+
+/**
+ * This is a value you can set  to ::RData::dfree.  Setting this means the data
+ * is managed by  someone else, like, statically allocated.  Of  course you are
+ * on your own then.
+ */
+#define RUBY_NEVER_FREE           RBIMPL_DATA_FUNC(0)
+
+/**
+ * @private
+ *
+ * @deprecated  This macro once was a thing in the old days, but makes no sense
+ *              any  longer today.   Exists  here  for backwards  compatibility
+ *              only.  You can safely forget about it.
+ */
+#define RUBY_UNTYPED_DATA_FUNC(f) f RBIMPL_ATTRSET_UNTYPED_DATA_FUNC()
+
+/*
+#define RUBY_DATA_FUNC(func) ((void (*)(void*))(func))
+*/
+
+/**
+ * This is  the type of callbacks  registered to ::RData.  The  argument is the
+ * `data` field.
+ */
+typedef void (*RUBY_DATA_FUNC)(void*);
+
+/**
+ * @deprecated
+ *
+ * Old  "untyped"  user  data.   It  has  roughly  the  same  usage  as  struct
+ * ::RTypedData, but lacked several features such as support for compaction GC.
+ * Use of this struct is not recommended  any longer.  If it is dead necessary,
+ * please inform the core devs about your usage.
+ *
+ * @internal
+ *
+ * @shyouhei tried to add RBIMPL_ATTR_DEPRECATED for this type but that yielded
+ * too many warnings  in the core.  Maybe  we want to retry  later...  Just add
+ * deprecated document for now.
+ */
+struct RData {
+
+    /** Basic part, including flags and class. */
+    struct RBasic basic;
+
+    /**
+     * This function is called when the object is experiencing GC marks.  If it
+     * contains references to  other Ruby objects, you need to  mark them also.
+     * Otherwise GC will smash your data.
+     *
+     * @see      rb_gc_mark()
+     * @warning  This  is  called  during  GC  runs.   Object  allocations  are
+     *           impossible at that moment (that is why GC runs).
+     */
+    RUBY_DATA_FUNC dmark;
+
+    /**
+     * This function is called when the object  is no longer used.  You need to
+     * do whatever necessary to avoid memory leaks.
+     *
+     * @warning  This  is  called  during  GC  runs.   Object  allocations  are
+     *           impossible at that moment (that is why GC runs).
+     */
+    RUBY_DATA_FUNC dfree;
+
+    /** Pointer to the actual C level struct that you want to wrap. */
+    void *data;
+};
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+
+/**
+ * This is the primitive way to wrap an existing C struct into ::RData.
+ *
+ * @param[in]  klass          Ruby level class of the returning object.
+ * @param[in]  datap          Pointer to the target C struct.
+ * @param[in]  dmark          Mark function.
+ * @param[in]  dfree          Free function.
+ * @exception  rb_eTypeError  `klass` is not a class.
+ * @exception  rb_eNoMemError  Out of memory.
+ * @return     An allocated object that wraps `datap`.
+ */
+VALUE rb_data_object_wrap(VALUE klass, void *datap, RUBY_DATA_FUNC dmark, RUBY_DATA_FUNC dfree);
+
+/**
+ * Identical to  rb_data_object_wrap(), except it  allocates a new  data region
+ * internally instead of taking an existing  one.  The allocation is done using
+ * ruby_calloc().   Hence  it  makes  no  sense to  pass  anything  other  than
+ * ::RUBY_DEFAULT_FREE to the last argument.
+ *
+ * @param[in]  klass          Ruby level class of the returning object.
+ * @param[in]  size           Requested size of memory to allocate.
+ * @param[in]  dmark          Mark function.
+ * @param[in]  dfree          Free function.
+ * @exception  rb_eTypeError  `klass` is not a class.
+ * @exception  rb_eNoMemError  Out of memory.
+ * @return     An allocated object that wraps a new `size` byte region.
+ */
+VALUE rb_data_object_zalloc(VALUE klass, size_t size, RUBY_DATA_FUNC dmark, RUBY_DATA_FUNC dfree);
+
+/**
+ * @private
+ * Documented in include/ruby/internal/globals.h
+ */
+RUBY_EXTERN VALUE rb_cObject;
+RBIMPL_SYMBOL_EXPORT_END()
+
+/**
+ * Converts sval, a pointer to your struct, into a Ruby object.
+ *
+ * @param      klass          A ruby level class.
+ * @param      mark           Mark function.
+ * @param      free           Free function.
+ * @param      sval           A pointer to your struct.
+ * @exception  rb_eTypeError  `klass` is not a class.
+ * @exception  rb_eNoMemError  Out of memory.
+ * @return     A created Ruby object.
+ */
+#define Data_Wrap_Struct(klass, mark, free, sval) \
+    rb_data_object_wrap(                          \
+        (klass),                                  \
+        (sval),                                   \
+        RBIMPL_DATA_FUNC(mark),                    \
+        RBIMPL_DATA_FUNC(free))
+
+/**
+ * @private
+ *
+ * This is an implementation detail  of #Data_Make_Struct.  People don't use it
+ * directly.
+ *
+ * @param  result     Variable name of created Ruby object.
+ * @param  klass      Ruby level class of the object.
+ * @param  type       Type name of the C struct.
+ * @param  size       Size of the C struct.
+ * @param  mark       Mark function.
+ * @param  free       Free function.
+ * @param  sval       Variable name of created C struct.
+ */
+#define Data_Make_Struct0(result, klass, type, size, mark, free, sval)  \
+    VALUE result = rb_data_object_zalloc(          \
+        (klass),                                   \
+        (size),                                    \
+        RBIMPL_DATA_FUNC(mark),                     \
+        RBIMPL_DATA_FUNC(free));                    \
+    (sval) = RBIMPL_CAST((type *)DATA_PTR(result)); \
+    RBIMPL_CAST(/*suppress unused variable warnings*/(void)(sval))
+
+/**
+ * Identical  to  #Data_Wrap_Struct, except  it  allocates  a new  data  region
+ * internally instead of taking an existing  one.  The allocation is done using
+ * ruby_calloc().   Hence  it  makes  no  sense to  pass  anything  other  than
+ * ::RUBY_DEFAULT_FREE to the `free` argument.
+ *
+ * @param      klass          Ruby level class of the returning object.
+ * @param      type           Type name of the C struct.
+ * @param      mark           Mark function.
+ * @param      free           Free function.
+ * @param      sval           Variable name of created C struct.
+ * @exception  rb_eTypeError  `klass` is not a class.
+ * @exception  rb_eNoMemError  Out of memory.
+ * @return     A created Ruby object.
+ */
+#ifdef HAVE_STMT_AND_DECL_IN_EXPR
+#define Data_Make_Struct(klass, type, mark, free, sval) \
+    RB_GNUC_EXTENSION({      \
+        Data_Make_Struct0(   \
+            data_struct_obj, \
+            klass,           \
+            type,            \
+            sizeof(type),    \
+            mark,            \
+            free,            \
+            sval);           \
+        data_struct_obj;     \
+    })
+#else
+#define Data_Make_Struct(klass, type, mark, free, sval) \
+    rb_data_object_make(              \
+        (klass),                      \
+        RBIMPL_DATA_FUNC(mark),        \
+        RBIMPL_DATA_FUNC(free),        \
+        RBIMPL_CAST((void **)&(sval)), \
+        sizeof(type))
+#endif
+
+/**
+ * Obtains a C struct from inside of a wrapper Ruby object.
+ *
+ * @param      obj            An instance of ::RData.
+ * @param      type           Type name of the C struct.
+ * @param      sval           Variable name of obtained C struct.
+ * @return     Unwrapped C struct that `obj` holds.
+ */
+#define Data_Get_Struct(obj, type, sval) \
+    ((sval) = RBIMPL_CAST((type*)rb_data_object_get(obj)))
+
+RBIMPL_ATTRSET_UNTYPED_DATA_FUNC()
+/**
+ * @private
+ *
+ * This is an implementation detail of rb_data_object_wrap().  People don't use
+ * it directly.
+ *
+ * @param[in]  klass          Ruby level class of the returning object.
+ * @param[in]  ptr            Pointer to the target C struct.
+ * @param[in]  mark           Mark function.
+ * @param[in]  free           Free function.
+ * @exception  rb_eTypeError  `klass` is not a class.
+ * @exception  rb_eNoMemError  Out of memory.
+ * @return     An allocated object that wraps `datap`.
+ */
+static inline VALUE
+rb_data_object_wrap_warning(VALUE klass, void *ptr, RUBY_DATA_FUNC mark, RUBY_DATA_FUNC free)
+{
+    return rb_data_object_wrap(klass, ptr, mark, free);
+}
+
+/**
+ * @private
+ *
+ * This is an  implementation detail of #Data_Get_Struct.  People  don't use it
+ * directly.
+ *
+ * @param[in]  obj  An instance of ::RData.
+ * @return     Unwrapped C struct that `obj` holds.
+ */
+static inline void *
+rb_data_object_get(VALUE obj)
+{
+    Check_Type(obj, RUBY_T_DATA);
+    return DATA_PTR(obj);
+}
+
+RBIMPL_ATTRSET_UNTYPED_DATA_FUNC()
+/**
+ * @private
+ *
+ * This is an  implementation detail of #Data_Get_Struct.  People  don't use it
+ * directly.
+ *
+ * @param[in]  obj  An instance of ::RData.
+ * @return     Unwrapped C struct that `obj` holds.
+ */
+static inline void *
+rb_data_object_get_warning(VALUE obj)
+{
+    return rb_data_object_get(obj);
+}
+
+#if defined(HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P)
+# define rb_data_object_wrap_warning(klass, ptr, mark, free) \
+    RB_GNUC_EXTENSION(                                       \
+        __builtin_choose_expr(                               \
+            __builtin_constant_p(klass) && !(klass),         \
+            rb_data_object_wrap(klass, ptr, mark, free),     \
+            (rb_data_object_wrap_warning)(klass, ptr, mark, free)))
+#endif
+
+/**
+ * This is an implementation detail  of #Data_Make_Struct.  People don't use it
+ * directly.
+ *
+ * @param[in]  klass           Ruby level class of the returning object.
+ * @param[in]  mark_func       Mark function.
+ * @param[in]  free_func       Free function.
+ * @param[in]  datap           Variable of created C struct.
+ * @param[in]  size            Requested size of allocation.
+ * @exception  rb_eTypeError  `klass` is not a class.
+ * @exception  rb_eNoMemError  Out of memory.
+ * @return     A created Ruby object.
+ * @post       `*datap` holds the created C struct.
+ */
+static inline VALUE
+rb_data_object_make(VALUE klass, RUBY_DATA_FUNC mark_func, RUBY_DATA_FUNC free_func, void **datap, size_t size)
+{
+    Data_Make_Struct0(result, klass, void, size, mark_func, free_func, *datap);
+    return result;
+}
+
+RBIMPL_ATTR_DEPRECATED(("by: rb_data_object_wrap"))
+/** @deprecated  This function was renamed to rb_data_object_wrap(). */
+static inline VALUE
+rb_data_object_alloc(VALUE klass, void *data, RUBY_DATA_FUNC dmark, RUBY_DATA_FUNC dfree)
+{
+    return rb_data_object_wrap(klass, data, dmark, dfree);
+}
+
+/** @cond INTERNAL_MACRO */
+#define rb_data_object_wrap_0 rb_data_object_wrap
+#define rb_data_object_wrap_1 rb_data_object_wrap_warning
+#define rb_data_object_wrap_2 rb_data_object_wrap_ /* Used here vvvv */
+#define rb_data_object_wrap   RUBY_MACRO_SELECT(rb_data_object_wrap_2, RUBY_UNTYPED_DATA_WARNING)
+#define rb_data_object_get_0  rb_data_object_get
+#define rb_data_object_get_1  rb_data_object_get_warning
+#define rb_data_object_get_2  rb_data_object_get_ /* Used here vvvv */
+#define rb_data_object_get    RUBY_MACRO_SELECT(rb_data_object_get_2, RUBY_UNTYPED_DATA_WARNING)
+#define rb_data_object_make_0 rb_data_object_make
+#define rb_data_object_make_1 rb_data_object_make_warning
+#define rb_data_object_make_2 rb_data_object_make_ /* Used here vvvv */
+#define rb_data_object_make   RUBY_MACRO_SELECT(rb_data_object_make_2, RUBY_UNTYPED_DATA_WARNING)
+/** @endcond */
+#endif /* RBIMPL_RDATA_H */

libs/libruby/ruby/internal/core/rfile.h

@@ -0,0 +1,51 @@
+#ifndef RBIMPL_RFILE_H                               /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_RFILE_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines struct ::RFile.
+ */
+#include "ruby/internal/core/rbasic.h"
+#include "ruby/internal/cast.h"
+
+/* rb_io_t is in ruby/io.h.  The header file has historically not been included
+ * into ruby/ruby.h.  We follow that tradition. */
+struct rb_io_t;
+
+/**
+ * Ruby's File  and IO.  Ruby's  IO are not  just file descriptors.   They have
+ * buffers.   They also  have  encodings.  Various  information are  controlled
+ * using this struct.
+ */
+struct RFile {
+
+    /** Basic part, including flags and class. */
+    struct RBasic basic;
+
+    /** IO's specific fields. */
+    struct rb_io_t *fptr;
+};
+
+/**
+ * Convenient casting macro.
+ *
+ * @param   obj  An object, which is in fact an ::RFile.
+ * @return  The passed object casted to ::RFile.
+ */
+#define RFILE(obj) RBIMPL_CAST((struct RFile *)(obj))
+#endif /* RBIMPL_RFILE_H */

libs/libruby/ruby/internal/core/rhash.h

@@ -0,0 +1,144 @@
+#ifndef RBIMPL_RHASH_H                               /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_RHASH_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Routines to manipulate struct RHash.
+ * @note       The struct RHash itself is opaque.
+ */
+#include "ruby/internal/config.h"
+
+#ifdef STDC_HEADERS
+# include <stddef.h>
+#endif
+
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/value.h"
+#if !defined RUBY_EXPORT && !defined RUBY_NO_OLD_COMPATIBILITY
+# include "ruby/backward.h"
+#endif
+
+/**
+ * Retrieves the internal table.
+ *
+ * @param[in]  h  An instance of RHash.
+ * @pre        `h` must be of ::RUBY_T_HASH.
+ * @return     A struct st_table which has the contents of this hash.
+ * @note       Nowadays as Ruby  evolved over ages, RHash  has multiple backend
+ *             storage  engines.   `h`'s backend  is  not  guaranteed to  be  a
+ *             st_table.  This function creates one when necessary.
+ */
+#define RHASH_TBL(h)                rb_hash_tbl(h, __FILE__, __LINE__)
+
+/**
+ * @private
+ *
+ * @deprecated  This macro once was a thing in the old days, but makes no sense
+ *              any  longer today.   Exists  here  for backwards  compatibility
+ *              only.  You can safely forget about it.
+ *
+ * @internal
+ *
+ * Declaration of rb_hash_iter_lev() is at include/ruby/backward.h.
+ */
+#define RHASH_ITER_LEV(h)           rb_hash_iter_lev(h)
+
+/**
+ * @private
+ *
+ * @deprecated  This macro once was a thing in the old days, but makes no sense
+ *              any  longer today.   Exists  here  for backwards  compatibility
+ *              only.  You can safely forget about it.
+ *
+ * @internal
+ *
+ * Declaration of rb_hash_ifnone() is at include/ruby/backward.h.
+ */
+#define RHASH_IFNONE(h)             rb_hash_ifnone(h)
+
+/**
+ * Queries the size of  the hash.  Size here means the number  of keys that the
+ * hash stores.
+ *
+ * @param[in]  h  An instance of RHash.
+ * @pre        `h` must be of ::RUBY_T_HASH.
+ * @return     The size of the hash.
+ */
+#define RHASH_SIZE(h)               rb_hash_size_num(h)
+
+/**
+ * Checks if the hash is empty.
+ *
+ * @param[in]  h      An instance of RHash.
+ * @pre        `h` must be of ::RUBY_T_HASH.
+ * @retval     true   It is.
+ * @retval     false  It isn't.
+ */
+#define RHASH_EMPTY_P(h)            (RHASH_SIZE(h) == 0)
+
+/**
+ * Destructively updates the default value of the hash.
+ *
+ * @param[out]  h       An instance of RHash.
+ * @param[in]   ifnone  Arbitrary default value.
+ * @pre        `h` must be of ::RUBY_T_HASH.
+ *
+ * @internal
+ *
+ * But why you can set this, given rb_hash_ifnone() doesn't exist?
+ */
+#define RHASH_SET_IFNONE(h, ifnone) rb_hash_set_ifnone((VALUE)h, ifnone)
+
+struct st_table;  /* in ruby/st.h */
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+
+/**
+ * This is  the implementation detail  of #RHASH_SIZE.  People don't  call this
+ * directly.
+ *
+ * @param[in]  hash  An instance of RHash.
+ * @pre        `hash` must be of ::RUBY_T_HASH.
+ * @return     The size of the hash.
+ */
+size_t rb_hash_size_num(VALUE hash);
+
+/**
+ * This is  the implementation  detail of #RHASH_TBL.   People don't  call this
+ * directly.
+ *
+ * @param[in]  hash  An instance of RHash.
+ * @param[in]  file  The `__FILE__`.
+ * @param[in]  line  The `__LINE__`.
+ * @pre        `hash` must be of ::RUBY_T_HASH.
+ * @return     Table that has the contents of the hash.
+ */
+struct st_table *rb_hash_tbl(VALUE hash, const char *file, int line);
+
+/**
+ * This is the  implementation detail of #RHASH_SET_IFNONE.   People don't call
+ * this directly.
+ *
+ * @param[out]  hash    An instance of RHash.
+ * @param[in]   ifnone  Arbitrary default value.
+ * @pre        `hash` must be of ::RUBY_T_HASH.
+ */
+VALUE rb_hash_set_ifnone(VALUE hash, VALUE ifnone);
+RBIMPL_SYMBOL_EXPORT_END()
+
+#endif /* RBIMPL_RHASH_H */

libs/libruby/ruby/internal/core/rmatch.h

@@ -0,0 +1,146 @@
+#ifndef RBIMPL_RMATCH_H                              /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_RMATCH_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines struct ::RMatch.
+ */
+#include "ruby/internal/attr/artificial.h"
+#include "ruby/internal/attr/pure.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/core/rbasic.h"
+#include "ruby/internal/value.h"
+#include "ruby/internal/value_type.h"
+#include "ruby/assert.h"
+
+/**
+ * Convenient casting macro.
+ *
+ * @param   obj  An object, which is in fact an ::RMatch.
+ * @return  The passed object casted to ::RMatch.
+ */
+#define RMATCH(obj) RBIMPL_CAST((struct RMatch *)(obj))
+/** @cond INTERNAL_MACRO */
+#define RMATCH_REGS RMATCH_REGS
+/** @endcond */
+
+struct re_patter_buffer; /* a.k.a. OnigRegexType, defined in onigmo.h */
+struct re_registers;     /* Also in onigmo.h */
+
+/**
+ * @old{re_pattern_buffer}
+ *
+ * @internal
+ *
+ * @shyouhei wonders: is anyone actively using this typedef ...?
+ */
+typedef struct re_pattern_buffer Regexp;
+
+/**
+ * Represents the  region of a  capture group.   This is basically  for caching
+ * purpose.  re_registers have similar concepts  (`beg` and `end`) but they are
+ * in `ptrdiff_t*`.  In order for  us to implement `MatchData#offset` that info
+ * has to  be converted to  offset integers.  This is  the struct to  hold such
+ * things.
+ *
+ * @internal
+ *
+ * But why on earth it has to be visible from extension libraries?
+ */
+struct rmatch_offset {
+    long beg; /**< Beginning of a group. */
+    long end; /**< End of a group. */
+};
+
+/** Represents a match. */
+struct rmatch {
+    /**
+     * "Registers"  of a  match.   This  is a  quasi-opaque  struct that  holds
+     * execution result of a match.  Roughly resembles `&~`.
+     */
+    struct re_registers regs;
+
+    /** Capture group offsets, in C array. */
+    struct rmatch_offset *char_offset;
+
+    /** Number of ::rmatch_offset that ::rmatch::char_offset holds. */
+    int char_offset_num_allocated;
+};
+
+/**
+ * Regular expression  execution context.  When a  regular expression "matches"
+ * to a string, it generates capture  groups etc.  This struct holds that info.
+ * Visible from Ruby as an instance of `MatchData`.
+ *
+ * @note  There is  no way  for extension libraries  to manually  generate this
+ *        struct except by actually exercising the match operation of a regular
+ *        expression.
+ */
+struct RMatch {
+
+    /** Basic part, including flags and class. */
+    struct RBasic basic;
+
+    /**
+     * The target string that the match was made against.
+     */
+    VALUE str;
+
+    /**
+     * The result of this match.
+     */
+    struct rmatch *rmatch;
+
+    /**
+     * The expression of this match.
+     */
+    VALUE regexp;  /* RRegexp */
+};
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Queries the raw ::re_registers.
+ *
+ * @param[in]  match  A match object
+ * @pre        `match` must be of ::RMatch.
+ * @return     Its execution result.
+ * @note       Good.  So you  are aware of the fact that  it could return NULL.
+ *             Yes.  It  actually does.  This  is a really bizarre  thing.  The
+ *             situation  is about  `String#gsub`  and its  family.  They  take
+ *             strings as  arguments, like `"foo".sub("bar", "baz")`.   On such
+ *             situations,  in  order  to optimise  memory  allocations,  these
+ *             methods do  not involve regular  expressions at all.   They just
+ *             sequentially scan  the receiver.  Okay.  The  story begins here.
+ *             Even when  they do  not kick  our regexp  engine, there  must be
+ *             backref objects e.g. `$&`.  But how?  You know what?  Ruby fakes
+ *             them.  It  allocates an empty  ::RMatch and behaves as  if there
+ *             were  execution   contexts.   In  reality  there   weren't.   No
+ *             ::re_registers are  allocated then.   There is  no way  for this
+ *             function but  to return NULL  for those fake ::RMatch.   This is
+ *             the reason for the nullability of this function.
+ */
+static inline struct re_registers *
+RMATCH_REGS(VALUE match)
+{
+    RBIMPL_ASSERT_TYPE(match, RUBY_T_MATCH);
+    RBIMPL_ASSERT_OR_ASSUME(RMATCH(match)->rmatch != NULL);
+    return &RMATCH(match)->rmatch->regs;
+}
+
+#endif /* RBIMPL_RMATCH_H */

libs/libruby/ruby/internal/core/robject.h

@@ -0,0 +1,176 @@
+#ifndef RBIMPL_ROBJECT_H                             /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_ROBJECT_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines struct ::RObject.
+ */
+#include "ruby/internal/config.h"
+
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+
+#include "ruby/internal/attr/artificial.h"
+#include "ruby/internal/attr/deprecated.h"
+#include "ruby/internal/attr/pure.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/fl_type.h"
+#include "ruby/internal/value.h"
+#include "ruby/internal/value_type.h"
+
+/**
+ * Convenient casting macro.
+ *
+ * @param   obj  An object, which is in fact an ::RObject.
+ * @return  The passed object casted to ::RObject.
+ */
+#define ROBJECT(obj)          RBIMPL_CAST((struct RObject *)(obj))
+/** @cond INTERNAL_MACRO */
+#define ROBJECT_EMBED_LEN_MAX ROBJECT_EMBED_LEN_MAX
+#define ROBJECT_EMBED         ROBJECT_EMBED
+#define ROBJECT_IV_CAPACITY   ROBJECT_IV_CAPACITY
+#define ROBJECT_IVPTR         ROBJECT_IVPTR
+/** @endcond */
+
+/**
+ * @private
+ *
+ * Bits that you can set to ::RBasic::flags.
+ */
+enum ruby_robject_flags {
+    /**
+     * This flag has  something to do with memory footprint.   If the object is
+     * "small"  enough, ruby  tries to  be creative  to abuse  padding bits  of
+     * struct ::RObject for storing instance variables.  This flag denotes that
+     * situation.
+     *
+     * @warning  This  bit has  to be  considered read-only.   Setting/clearing
+     *           this  bit without  corresponding fix  up must  cause immediate
+     *           SEGV.   Also,   internal  structures   of  an   object  change
+     *           dynamically  and  transparently  throughout of  its  lifetime.
+     *           Don't assume it being persistent.
+     *
+     * @internal
+     *
+     * 3rd parties must  not be aware that  there even is more than  one way to
+     * store instance variables.  Might better be hidden.
+     */
+    ROBJECT_EMBED = RUBY_FL_USER1
+};
+
+#if !USE_RVARGC
+/**
+ * This is an enum because GDB wants it (rather than a macro).  People need not
+ * bother.
+ */
+enum ruby_robject_consts {
+    /** Max possible number of instance variables that can be embedded. */
+    ROBJECT_EMBED_LEN_MAX = RBIMPL_EMBED_LEN_MAX_OF(VALUE)
+};
+#endif
+
+struct st_table;
+
+/**
+ * Ruby's ordinal objects.  Unless otherwise  special cased, all predefined and
+ * user-defined classes share this struct to hold their instances.
+ */
+struct RObject {
+
+    /** Basic part, including flags and class. */
+    struct RBasic basic;
+
+    /** Object's specific fields. */
+    union {
+
+        /**
+         * Object that use  separated memory region for  instance variables use
+         * this pattern.
+         */
+        struct {
+            /** Pointer to a C array that holds instance variables. */
+            VALUE *ivptr;
+
+            /**
+             * This  is a  table that  holds  instance variable  name to  index
+             * mapping.  Used when accessing instance variables using names.
+             *
+             * @internal
+             *
+             * This is a shortcut for `RCLASS_IV_INDEX_TBL(rb_obj_class(obj))`.
+             */
+            struct rb_id_table *iv_index_tbl;
+        } heap;
+
+#if USE_RVARGC
+        /* Embedded instance variables. When an object is small enough, it
+         * uses this area to store the instance variables.
+         *
+         * This is a length 1 array because:
+         *   1. GCC has a bug that does not optimize C flexible array members
+         *      (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102452)
+         *   2. Zero length arrays are not supported by all compilers
+         */
+        VALUE ary[1];
+#else
+        /**
+        * Embedded instance  variables.  When  an object  is small  enough, it
+        * uses this area to store the instance variables.
+        */
+        VALUE ary[ROBJECT_EMBED_LEN_MAX];
+#endif
+    } as;
+};
+
+/* Offsets for YJIT */
+#ifndef __cplusplus
+static const int32_t ROBJECT_OFFSET_AS_HEAP_IVPTR = offsetof(struct RObject, as.heap.ivptr);
+static const int32_t ROBJECT_OFFSET_AS_HEAP_IV_INDEX_TBL = offsetof(struct RObject, as.heap.iv_index_tbl);
+static const int32_t ROBJECT_OFFSET_AS_ARY = offsetof(struct RObject, as.ary);
+#endif
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Queries the instance variables.
+ *
+ * @param[in]  obj  Object in question.
+ * @return     Its instance variables, in C array.
+ * @pre        `obj` must be an instance of ::RObject.
+ *
+ * @internal
+ *
+ * @shyouhei finds no reason for this to be visible from extension libraries.
+ */
+static inline VALUE *
+ROBJECT_IVPTR(VALUE obj)
+{
+    RBIMPL_ASSERT_TYPE(obj, RUBY_T_OBJECT);
+
+    struct RObject *const ptr = ROBJECT(obj);
+
+    if (RB_FL_ANY_RAW(obj, ROBJECT_EMBED)) {
+        return ptr->as.ary;
+    }
+    else {
+        return ptr->as.heap.ivptr;
+    }
+}
+
+#endif /* RBIMPL_ROBJECT_H */

libs/libruby/ruby/internal/core/rregexp.h

@@ -0,0 +1,168 @@
+#ifndef RBIMPL_RREGEXP_H                             /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_RREGEXP_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines struct ::RRegexp.
+ */
+#include "ruby/internal/attr/artificial.h"
+#include "ruby/internal/attr/pure.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/core/rbasic.h"
+#include "ruby/internal/core/rstring.h"
+#include "ruby/internal/value.h"
+#include "ruby/internal/value_type.h"
+
+/**
+ * Convenient casting macro.
+ *
+ * @param   obj  An object, which is in fact an ::RRegexp.
+ * @return  The passed object casted to ::RRegexp.
+ */
+#define RREGEXP(obj)     RBIMPL_CAST((struct RRegexp *)(obj))
+
+/**
+ * Convenient accessor macro.
+ *
+ * @param   obj  An object, which is in fact an ::RRegexp.
+ * @return  The passed object's pattern buffer.
+ */
+#define RREGEXP_PTR(obj) (RREGEXP(obj)->ptr)
+/** @cond INTERNAL_MACRO */
+#define RREGEXP_SRC      RREGEXP_SRC
+#define RREGEXP_SRC_PTR  RREGEXP_SRC_PTR
+#define RREGEXP_SRC_LEN  RREGEXP_SRC_LEN
+#define RREGEXP_SRC_END  RREGEXP_SRC_END
+/** @endcond */
+
+struct re_patter_buffer;  /* a.k.a. OnigRegexType, defined in onigmo.h */
+
+/**
+ * Ruby's regular expression.   A regexp is compiled into  its own intermediate
+ * representation.  This  one holds that  info.  Regexp "match"  operation then
+ * executes that IR.
+ */
+struct RRegexp {
+
+    /** Basic part, including flags and class. */
+    struct RBasic basic;
+
+    /**
+     * The pattern buffer.   This is a quasi-opaque struct  that holds compiled
+     * intermediate representation of the regular expression.
+     *
+     * @note  Compilation of a regexp could be delayed until actual match.
+     */
+    struct re_pattern_buffer *ptr;
+
+    /** Source code of this expression. */
+    const VALUE src;
+
+    /**
+     * Reference count.  A  regexp match can take extraordinarily  long time to
+     * run.  Ruby's  regular expression is  heavily extended and not  a regular
+     * language any  longer; runs in NP-time  in practice.  Now, Ruby  also has
+     * threads and GVL.  In order to prevent long GVL lockup, our regexp engine
+     * can release it on occasions.  This means that multiple threads can touch
+     * a regular expressions at once.  That  itself is okay.  But their cleanup
+     * phase shall wait for all  the concurrent runs, to prevent use-after-free
+     * situation.  This field is used to  count such threads that are executing
+     * this particular pattern buffer.
+     *
+     * @warning  Of course, touching this field from extension libraries causes
+     *           catastrophic effects.  Just leave it.
+     */
+    unsigned long usecnt;
+};
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Convenient getter function.
+ *
+ * @param[in]  rexp  The regular expression in question.
+ * @return     The source code of the regular expression.
+ * @pre        `rexp` must be of ::RRegexp.
+ */
+static inline VALUE
+RREGEXP_SRC(VALUE rexp)
+{
+    RBIMPL_ASSERT_TYPE(rexp, RUBY_T_REGEXP);
+    VALUE ret = RREGEXP(rexp)->src;
+    RBIMPL_ASSERT_TYPE(ret, RUBY_T_STRING);
+    return ret;
+}
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Convenient getter function.
+ *
+ * @param[in]  rexp  The regular expression in question.
+ * @return     The source code of the regular expression, in C's string.
+ * @pre        `rexp` must be of ::RRegexp.
+ *
+ * @internal
+ *
+ * It seems nobody uses this function in the wild.  Subject to hide?
+ */
+static inline char *
+RREGEXP_SRC_PTR(VALUE rexp)
+{
+    return RSTRING_PTR(RREGEXP_SRC(rexp));
+}
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Convenient getter function.
+ *
+ * @param[in]  rexp  The regular expression in question.
+ * @return     The length of the source code of the regular expression.
+ * @pre        `rexp` must be of ::RRegexp.
+ *
+ * @internal
+ *
+ * It seems nobody uses this function in the wild.  Subject to hide?
+ */
+static inline long
+RREGEXP_SRC_LEN(VALUE rexp)
+{
+    return RSTRING_LEN(RREGEXP_SRC(rexp));
+}
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Convenient getter function.
+ *
+ * @param[in]  rexp  The regular expression in question.
+ * @return     The end of the source code of the regular expression.
+ * @pre        `rexp` must be of ::RRegexp.
+ *
+ * @internal
+ *
+ * It seems nobody uses this function in the wild.  Subject to hide?
+ */
+static inline char *
+RREGEXP_SRC_END(VALUE rexp)
+{
+    return RSTRING_END(RREGEXP_SRC(rexp));
+}
+
+#endif /* RBIMPL_RREGEXP_H */

libs/libruby/ruby/internal/core/rstring.h

@@ -0,0 +1,578 @@
+#ifndef RBIMPL_RSTRING_H                             /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_RSTRING_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines struct ::RString.
+ */
+#include "ruby/internal/config.h"
+#include "ruby/internal/arithmetic/long.h"
+#include "ruby/internal/attr/artificial.h"
+#include "ruby/internal/attr/pure.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/core/rbasic.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/fl_type.h"
+#include "ruby/internal/value_type.h"
+#include "ruby/internal/warning_push.h"
+#include "ruby/assert.h"
+
+/**
+ * Convenient casting macro.
+ *
+ * @param   obj  An object, which is in fact an ::RString.
+ * @return  The passed object casted to ::RString.
+ */
+#define RSTRING(obj)            RBIMPL_CAST((struct RString *)(obj))
+
+/** @cond INTERNAL_MACRO */
+#define RSTRING_NOEMBED         RSTRING_NOEMBED
+#if !USE_RVARGC
+#define RSTRING_EMBED_LEN_MASK  RSTRING_EMBED_LEN_MASK
+#define RSTRING_EMBED_LEN_SHIFT RSTRING_EMBED_LEN_SHIFT
+#define RSTRING_EMBED_LEN_MAX   RSTRING_EMBED_LEN_MAX
+#endif
+#define RSTRING_FSTR            RSTRING_FSTR
+#define RSTRING_EMBED_LEN RSTRING_EMBED_LEN
+#define RSTRING_LEN       RSTRING_LEN
+#define RSTRING_LENINT    RSTRING_LENINT
+#define RSTRING_PTR       RSTRING_PTR
+#define RSTRING_END       RSTRING_END
+/** @endcond */
+
+/**
+ * @name Conversion of Ruby strings into C's
+ *
+ * @{
+ */
+
+/**
+ * Ensures that the parameter object is a  String.  This is done by calling its
+ * `to_str` method.
+ *
+ * @param[in,out]  v              Arbitrary Ruby object.
+ * @exception      rb_eTypeError  No implicit conversion defined.
+ * @post           `v` is a String.
+ */
+#define StringValue(v)     rb_string_value(&(v))
+
+/**
+ * Identical to #StringValue, except it returns a `char*`.
+ *
+ * @param[in,out]  v              Arbitrary Ruby object.
+ * @exception      rb_eTypeError  No implicit conversion defined.
+ * @return         Converted Ruby string's backend C string.
+ * @post           `v` is a String.
+ */
+#define StringValuePtr(v)  rb_string_value_ptr(&(v))
+
+/**
+ * Identical to #StringValuePtr, except it additionally checks for the contents
+ * for viability  as a C  string.  Ruby can accept  wider range of  contents as
+ * strings, compared to C.  This function is to check that.
+ *
+ * @param[in,out]  v              Arbitrary Ruby object.
+ * @exception      rb_eTypeError  No implicit conversion defined.
+ * @exception      rb_eArgError   String is not C-compatible.
+ * @return         Converted Ruby string's backend C string.
+ * @post           `v` is a String.
+ */
+#define StringValueCStr(v) rb_string_value_cstr(&(v))
+
+/**
+ * @private
+ *
+ * @deprecated  This macro once was a thing in the old days, but makes no sense
+ *              any  longer today.   Exists  here  for backwards  compatibility
+ *              only.  You can safely forget about it.
+ */
+#define SafeStringValue(v) StringValue(v)
+
+/**
+ * Identical  to #StringValue,  except  it additionally  converts the  string's
+ * encoding to default external encoding.  Ruby has a concept called encodings.
+ * A string can have different  encoding than the environment expects.  Someone
+ * has to make  sure its contents be converted to  something suitable.  This is
+ * that routine.  Call it when necessary.
+ *
+ * @param[in,out]  v              Arbitrary Ruby object.
+ * @exception      rb_eTypeError  No implicit conversion defined.
+ * @return         Converted Ruby string's backend C string.
+ * @post           `v` is a String.
+ *
+ * @internal
+ *
+ * Not   sure  but   it  seems   this  macro   does  not   raise  on   encoding
+ * incompatibilities?  Doesn't sound right to @shyouhei.
+ */
+#define ExportStringValue(v) do { \
+    StringValue(v);               \
+    (v) = rb_str_export(v);       \
+} while (0)
+
+/** @} */
+
+/**
+ * @private
+ *
+ * Bits that you can set to ::RBasic::flags.
+ *
+ * @warning  These enums are not the only bits we use for strings.
+ *
+ * @internal
+ *
+ * Actually all bits  through FL_USER1 to FL_USER19 are used  for strings.  Why
+ * only this  tiny part of  them are made public  here?  @shyouhei can  find no
+ * reason.
+ */
+enum ruby_rstring_flags {
+
+    /**
+     * This flag has  something to do with memory footprint.   If the string is
+     * short enough, ruby tries to be  creative to abuse padding bits of struct
+     * ::RString for  storing contents.  If this  flag is set that  string does
+     * _not_  do that,  to resort  to  good old  fashioned external  allocation
+     * strategy instead.
+     *
+     * @warning  This  bit has  to be  considered read-only.   Setting/clearing
+     *           this  bit without  corresponding fix  up must  cause immediate
+     *           SEGV.    Also,  internal   structures  of   a  string   change
+     *           dynamically  and  transparently  throughout of  its  lifetime.
+     *           Don't assume it being persistent.
+     *
+     * @internal
+     *
+     * 3rd parties must  not be aware that  there even is more than  one way to
+     * store a string.  Might better be hidden.
+     */
+    RSTRING_NOEMBED         = RUBY_FL_USER1,
+
+#if !USE_RVARGC
+    /**
+     * When a  string employs embedded strategy  (see ::RSTRING_NOEMBED), these
+     * bits  are  used to  store  the  number  of  bytes actually  filled  into
+     * ::RString::ary.
+     *
+     * @internal
+     *
+     * 3rd parties must  not be aware that  there even is more than  one way to
+     * store a string.  Might better be hidden.
+     */
+    RSTRING_EMBED_LEN_MASK  = RUBY_FL_USER2 | RUBY_FL_USER3 | RUBY_FL_USER4 |
+                              RUBY_FL_USER5 | RUBY_FL_USER6,
+#endif
+
+    /* Actually,  string  encodings are  also  encoded  into the  flags,  using
+     * remaining bits.*/
+
+    /**
+     * This  flag has  something  to do  with infamous  "f"string.   What is  a
+     * fstring?  Well  it is a  special subkind  of strings that  is immutable,
+     * deduped globally, and managed  by our GC.  It is much  like a Symbol (in
+     * fact Symbols are  dynamic these days and are  backended using fstrings).
+     * This concept  has been  silently introduced  at some  point in  2.x era.
+     * Since  then it  gained  wider  acceptance in  the  core.  But  extension
+     * libraries could not know that until very recently.  Strings of this flag
+     * live in  a special Limbo deep  inside of the interpreter.   Never try to
+     * manipulate it by hand.
+     *
+     * @internal
+     *
+     * Fstrings  are not  the only  variant  strings that  we implement  today.
+     * Other things are behind-the-scene.  This is the only one that is visible
+     * from extension  library.  There  is no  clear reason why  it has  to be.
+     * Given there are more "polite" ways to create fstrings, it seems this bit
+     * need not be exposed to extension libraries.  Might better be hidden.
+     */
+    RSTRING_FSTR            = RUBY_FL_USER17
+};
+
+#if !USE_RVARGC
+/**
+ * This is an enum because GDB wants it (rather than a macro).  People need not
+ * bother.
+ */
+enum ruby_rstring_consts {
+    /** Where ::RSTRING_EMBED_LEN_MASK resides. */
+    RSTRING_EMBED_LEN_SHIFT = RUBY_FL_USHIFT + 2,
+
+    /** Max possible number of characters that can be embedded. */
+    RSTRING_EMBED_LEN_MAX   = RBIMPL_EMBED_LEN_MAX_OF(char) - 1
+};
+#endif
+
+/**
+ * Ruby's String.  A string in ruby conceptually has these information:
+ *
+ * - Encoding of the string.
+ * - Length of the string.
+ * - Contents of the string.
+ *
+ * It is worth  noting that a string  is _not_ an array of  characters in ruby.
+ * It has never been.   In 1.x a string was an array of  integers.  Since 2.x a
+ * string is no longer an array of anything.  A string is a string -- just like
+ * a Time is not an integer.
+ */
+struct RString {
+
+    /** Basic part, including flags and class. */
+    struct RBasic basic;
+
+    /** String's specific fields. */
+    union {
+
+        /**
+         * Strings  that use  separated  memory region  for  contents use  this
+         * pattern.
+         */
+        struct {
+
+            /**
+             * Length of the string, not including terminating NUL character.
+             *
+             * @note  This is in bytes.
+             */
+            long len;
+
+            /**
+             * Pointer to  the contents of  the string.   In the old  days each
+             * string had  dedicated memory  regions.  That  is no  longer true
+             * today,  but there  still are  strings of  such properties.  This
+             * field could be used to point such things.
+             */
+            char *ptr;
+
+            /** Auxiliary info. */
+            union {
+
+                /**
+                 * Capacity of `*ptr`.  A continuous  memory region of at least
+                 * `capa` bytes  is expected to  exist at `*ptr`.  This  can be
+                 * bigger than `len`.
+                 */
+                long capa;
+
+                /**
+                 * Parent  of the  string.   Nowadays strings  can share  their
+                 * contents each other, constructing  gigantic nest of objects.
+                 * This situation is called "shared",  and this is the field to
+                 * control such properties.
+                 */
+                VALUE shared;
+            } aux;
+        } heap;
+
+        /** Embedded contents. */
+        struct {
+#if USE_RVARGC
+            long len;
+            /* This is a length 1 array because:
+             *   1. GCC has a bug that does not optimize C flexible array members
+             *      (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102452)
+             *   2. Zero length arrays are not supported by all compilers
+             */
+            char ary[1];
+#else
+            /**
+             * When a  string is short enough,  it uses this area  to store the
+             * contents themselves.  This was  impractical in the 20th century,
+             * but these days 64 bit machines can typically hold 24 bytes here.
+             * Could be sufficiently large.  In this case the length is encoded
+             * into the flags.
+             */
+            char ary[RSTRING_EMBED_LEN_MAX + 1];
+#endif
+        } embed;
+    } as;
+};
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+/**
+ * Identical to rb_check_string_type(), except it  raises exceptions in case of
+ * conversion failures.
+ *
+ * @param[in]  obj            Target object.
+ * @exception  rb_eTypeError  No implicit conversion to String.
+ * @return     Return value of `obj.to_str`.
+ * @see        rb_io_get_io
+ * @see        rb_ary_to_ary
+ */
+VALUE rb_str_to_str(VALUE obj);
+
+/**
+ * Identical to  rb_str_to_str(), except it  fills the passed pointer  with the
+ * converted object.
+ *
+ * @param[in,out]  ptr            Pointer to a variable of target object.
+ * @exception      rb_eTypeError  No implicit conversion to String.
+ * @return         Return value of `obj.to_str`.
+ * @post           `*ptr` is the return value.
+ */
+VALUE rb_string_value(volatile VALUE *ptr);
+
+/**
+ * Identical  to  rb_str_to_str(), except  it  returns  the converted  string's
+ * backend memory region.
+ *
+ * @param[in,out]  ptr            Pointer to a variable of target object.
+ * @exception      rb_eTypeError  No implicit conversion to String.
+ * @post           `*ptr` is the return value of `obj.to_str`.
+ * @return         Pointer to the contents of the return value.
+ */
+char *rb_string_value_ptr(volatile VALUE *ptr);
+
+/**
+ * Identical to  rb_string_value_ptr(), except  it additionally checks  for the
+ * contents  for viability  as a  C  string.  Ruby  can accept  wider range  of
+ * contents as strings, compared to C.  This function is to check that.
+ *
+ * @param[in,out]  ptr            Pointer to a variable of target object.
+ * @exception      rb_eTypeError  No implicit conversion to String.
+ * @exception      rb_eArgError   String is not C-compatible.
+ * @post           `*ptr` is the return value of `obj.to_str`.
+ * @return         Pointer to the contents of the return value.
+ */
+char *rb_string_value_cstr(volatile VALUE *ptr);
+
+/**
+ * Identical  to rb_str_to_str(),  except it  additionally converts  the string
+ * into default  external encoding.   Ruby has a  concept called  encodings.  A
+ * string can  have different encoding  than the environment  expects.  Someone
+ * has to make  sure its contents be converted to  something suitable.  This is
+ * that routine.  Call it when necessary.
+ *
+ * @param[in]  obj            Target object.
+ * @exception  rb_eTypeError  No implicit conversion to String.
+ * @return     Converted ruby string of default external encoding.
+ */
+VALUE rb_str_export(VALUE obj);
+
+/**
+ * Identical to  rb_str_export(), except it  converts into the  locale encoding
+ * instead.
+ *
+ * @param[in]  obj            Target object.
+ * @exception  rb_eTypeError  No implicit conversion to String.
+ * @return     Converted ruby string of locale encoding.
+ */
+VALUE rb_str_export_locale(VALUE obj);
+
+RBIMPL_ATTR_ERROR(("rb_check_safe_str() and Check_SafeStr() are obsolete; use StringValue() instead"))
+/**
+ * @private
+ *
+ * @deprecated  This function  once was a thing  in the old days,  but makes no
+ *              sense   any   longer   today.   Exists   here   for   backwards
+ *              compatibility only.  You can safely forget about it.
+ */
+void rb_check_safe_str(VALUE);
+
+/**
+ * @private
+ *
+ * @deprecated  This macro once was a thing in the old days, but makes no sense
+ *              any  longer today.   Exists  here  for backwards  compatibility
+ *              only.  You can safely forget about it.
+ */
+#define Check_SafeStr(v) rb_check_safe_str(RBIMPL_CAST((VALUE)(v)))
+
+/**
+ * @private
+ *
+ * Prints diagnostic message to stderr when RSTRING_PTR or RSTRING_END
+ * is NULL.
+ *
+ * @param[in]  func           The function name where encountered NULL pointer.
+ */
+void rb_debug_rstring_null_ptr(const char *func);
+RBIMPL_SYMBOL_EXPORT_END()
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Queries the length of the string.
+ *
+ * @param[in]  str  String in question.
+ * @return     Its length, in bytes.
+ * @pre        `str`  must  be an  instance  of  ::RString,  and must  has  its
+ *             ::RSTRING_NOEMBED flag off.
+ *
+ * @internal
+ *
+ * This was a macro  before.  It was inevitable to be  public, since macros are
+ * global constructs.   But should it be  forever?  Now that it  is a function,
+ * @shyouhei thinks  it could  just be  eliminated, hidden  into implementation
+ * details.
+ */
+static inline long
+RSTRING_EMBED_LEN(VALUE str)
+{
+    RBIMPL_ASSERT_TYPE(str, RUBY_T_STRING);
+    RBIMPL_ASSERT_OR_ASSUME(! RB_FL_ANY_RAW(str, RSTRING_NOEMBED));
+
+#if USE_RVARGC
+    long f = RSTRING(str)->as.embed.len;
+    return f;
+#else
+    VALUE f = RBASIC(str)->flags;
+    f &= RSTRING_EMBED_LEN_MASK;
+    f >>= RSTRING_EMBED_LEN_SHIFT;
+    return RBIMPL_CAST((long)f);
+#endif
+}
+
+RBIMPL_WARNING_PUSH()
+#if RBIMPL_COMPILER_IS(Intel)
+RBIMPL_WARNING_IGNORED(413)
+#endif
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * @private
+ *
+ * "Expands" an embedded  string into an ordinal one.  This  is a function that
+ * returns aggregated type.   The returned struct always  has its `as.heap.len`
+ * an `as.heap.ptr` fields set appropriately.
+ *
+ * This is an implementation detail that 3rd parties should never bother.
+ */
+static inline struct RString
+rbimpl_rstring_getmem(VALUE str)
+{
+    RBIMPL_ASSERT_TYPE(str, RUBY_T_STRING);
+
+    if (RB_FL_ANY_RAW(str, RSTRING_NOEMBED)) {
+        return *RSTRING(str);
+    }
+    else {
+        /* Expecting compilers to optimize this on-stack struct away. */
+        struct RString retval;
+        retval.as.heap.len = RSTRING_EMBED_LEN(str);
+        retval.as.heap.ptr = RSTRING(str)->as.embed.ary;
+        return retval;
+    }
+}
+
+RBIMPL_WARNING_POP()
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Queries the length of the string.
+ *
+ * @param[in]  str  String in question.
+ * @return     Its length, in bytes.
+ * @pre        `str` must be an instance of ::RString.
+ */
+static inline long
+RSTRING_LEN(VALUE str)
+{
+    return rbimpl_rstring_getmem(str).as.heap.len;
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Queries the contents pointer of the string.
+ *
+ * @param[in]  str  String in question.
+ * @return     Pointer to its contents.
+ * @pre        `str` must be an instance of ::RString.
+ */
+static inline char *
+RSTRING_PTR(VALUE str)
+{
+    char *ptr = rbimpl_rstring_getmem(str).as.heap.ptr;
+
+    if (RB_UNLIKELY(! ptr)) {
+        /* :BEWARE: @shyouhei thinks  that currently, there are  rooms for this
+         * function to return  NULL.  In the 20th century that  was a pointless
+         * concern.  However struct RString can hold fake strings nowadays.  It
+         * seems no  check against NULL  are exercised around handling  of them
+         * (one  of  such   usages  is  located  in   marshal.c,  which  scares
+         * @shyouhei).  Better check here for maximum safety.
+         *
+         * Also,  this is  not rb_warn()  because RSTRING_PTR()  can be  called
+         * during GC (see  what obj_info() does).  rb_warn()  needs to allocate
+         * Ruby objects.  That is not possible at this moment. */
+        rb_debug_rstring_null_ptr("RSTRING_PTR");
+    }
+
+    return ptr;
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Queries the end of the contents pointer of the string.
+ *
+ * @param[in]  str  String in question.
+ * @return     Pointer to its end of contents.
+ * @pre        `str` must be an instance of ::RString.
+ */
+static inline char *
+RSTRING_END(VALUE str)
+{
+    struct RString buf = rbimpl_rstring_getmem(str);
+
+    if (RB_UNLIKELY(! buf.as.heap.ptr)) {
+        /* Ditto. */
+        rb_debug_rstring_null_ptr("RSTRING_END");
+    }
+
+    return &buf.as.heap.ptr[buf.as.heap.len];
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Identical to RSTRING_LEN(), except it differs for the return type.
+ *
+ * @param[in]  str             String in question.
+ * @exception  rb_eRangeError  Too long.
+ * @return     Its length, in bytes.
+ * @pre        `str` must be an instance of ::RString.
+ *
+ * @internal
+ *
+ * This API seems redundant but has actual usages.
+ */
+static inline int
+RSTRING_LENINT(VALUE str)
+{
+    return rb_long2int(RSTRING_LEN(str));
+}
+
+/**
+ * Convenient macro to obtain the contents and length at once.
+ *
+ * @param  str     String in question.
+ * @param  ptrvar  Variable where its contents is stored.
+ * @param  lenvar  Variable where its length is stored.
+ */
+#ifdef HAVE_STMT_AND_DECL_IN_EXPR
+# define RSTRING_GETMEM(str, ptrvar, lenvar) \
+    __extension__ ({ \
+        struct RString rbimpl_str = rbimpl_rstring_getmem(str); \
+        (ptrvar) = rbimpl_str.as.heap.ptr; \
+        (lenvar) = rbimpl_str.as.heap.len; \
+    })
+#else
+# define RSTRING_GETMEM(str, ptrvar, lenvar) \
+    ((ptrvar) = RSTRING_PTR(str),           \
+     (lenvar) = RSTRING_LEN(str))
+#endif /* HAVE_STMT_AND_DECL_IN_EXPR */
+#endif /* RBIMPL_RSTRING_H */

libs/libruby/ruby/internal/core/rstruct.h

@@ -0,0 +1,121 @@
+#ifndef RBIMPL_RSTRUCT_H                             /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_RSTRUCT_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Routines to manipulate struct RStruct.
+ * @note       The struct RStruct itself is opaque.
+ */
+#include "ruby/internal/attr/artificial.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/value.h"
+#include "ruby/internal/value_type.h"
+#include "ruby/internal/arithmetic/long.h"
+#include "ruby/internal/arithmetic/int.h"
+#if !defined RUBY_EXPORT && !defined RUBY_NO_OLD_COMPATIBILITY
+# include "ruby/backward.h"
+#endif
+
+/**
+ * @private
+ *
+ * @deprecated  This macro once was a thing in the old days, but makes no sense
+ *              any  longer today.   Exists  here  for backwards  compatibility
+ *              only.  You can safely forget about it.
+ *
+ * @internal
+ *
+ * Declaration of rb_struct_ptr() is at include/ruby/backward.h.
+ */
+#define RSTRUCT_PTR(st) rb_struct_ptr(st)
+/** @cond INTERNAL_MACRO */
+#define RSTRUCT_LEN RSTRUCT_LEN
+#define RSTRUCT_SET RSTRUCT_SET
+#define RSTRUCT_GET RSTRUCT_GET
+/** @endcond */
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+/**
+ * Returns the number of struct members.
+ *
+ * @param[in]  st  An instance of RStruct.
+ * @return     The number of members of `st`.
+ * @pre        `st` must be of ::RUBY_T_STRUCT.
+ */
+VALUE rb_struct_size(VALUE st);
+
+/**
+ * Resembles `Struct#[]`.
+ *
+ * @param[in]  st              An instance of RStruct.
+ * @param[in]  k               Index a.k.a. key of the struct.
+ * @exception  rb_eTypeError   `k` is neither Numeric, Symbol, nor String.
+ * @exception  rb_eIndexError  Numerical index out of range.
+ * @exception  rb_eNameError   No such key.
+ * @return     The member stored at `k` in `st`.
+ * @pre        `st` must be of ::RUBY_T_STRUCT.
+ */
+VALUE rb_struct_aref(VALUE st, VALUE k);
+
+/**
+ * Resembles `Struct#[]=`.
+ *
+ * @param[out]  st              An instance of RStruct.
+ * @param[in]   k               Index a.k.a. key of the struct.
+ * @param[in]   v               Value to store.
+ * @exception  rb_eTypeError    `k` is neither Numeric, Symbol, nor String.
+ * @exception  rb_eIndexError   Numerical index out of range.
+ * @exception  rb_eNameError    No such key.
+ * @return     Passed `v`.
+ * @pre        `st` must be of ::RUBY_T_STRUCT.
+ * @post       `v` is stored at `k` in `st`.
+ */
+VALUE rb_struct_aset(VALUE st, VALUE k, VALUE v);
+RBIMPL_SYMBOL_EXPORT_END()
+
+RBIMPL_ATTR_ARTIFICIAL()
+/** @copydoc rb_struct_size()  */
+static inline long
+RSTRUCT_LEN(VALUE st)
+{
+    RBIMPL_ASSERT_TYPE(st, RUBY_T_STRUCT);
+
+    return RB_NUM2LONG(rb_struct_size(st));
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+/** @copydoc rb_struct_aset()  */
+static inline VALUE
+RSTRUCT_SET(VALUE st, int k, VALUE v)
+{
+    RBIMPL_ASSERT_TYPE(st, RUBY_T_STRUCT);
+
+    return rb_struct_aset(st, INT2NUM(k), (v));
+}
+
+RBIMPL_ATTR_ARTIFICIAL()
+/** @copydoc rb_struct_aref()  */
+static inline VALUE
+RSTRUCT_GET(VALUE st, int k)
+{
+    RBIMPL_ASSERT_TYPE(st, RUBY_T_STRUCT);
+
+    return rb_struct_aref(st, INT2NUM(k));
+}
+
+#endif /* RBIMPL_RSTRUCT_H */

libs/libruby/ruby/internal/core/rtypeddata.h

@@ -0,0 +1,604 @@
+#ifndef RBIMPL_RTYPEDDATA_H                          /*-*-C++-*-vi:se ft=cpp:*/
+#define RBIMPL_RTYPEDDATA_H
+/**
+ * @file
+ * @author     Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
+ *             implementation details.   Don't take  them as canon.  They could
+ *             rapidly appear then vanish.  The name (path) of this header file
+ *             is also an  implementation detail.  Do not expect  it to persist
+ *             at the place it is now.  Developers are free to move it anywhere
+ *             anytime at will.
+ * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
+ *             recursively included  from extension  libraries written  in C++.
+ *             Do not  expect for  instance `__VA_ARGS__` is  always available.
+ *             We assume C99  for ruby itself but we don't  assume languages of
+ *             extension libraries.  They could be written in C++98.
+ * @brief      Defines struct ::RTypedData.
+ */
+#include "ruby/internal/config.h"
+
+#ifdef STDC_HEADERS
+# include <stddef.h>
+#endif
+
+#include "ruby/internal/assume.h"
+#include "ruby/internal/attr/artificial.h"
+#include "ruby/internal/attr/flag_enum.h"
+#include "ruby/internal/attr/nonnull.h"
+#include "ruby/internal/attr/pure.h"
+#include "ruby/internal/cast.h"
+#include "ruby/internal/core/rbasic.h"
+#include "ruby/internal/core/rdata.h"
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/error.h"
+#include "ruby/internal/fl_type.h"
+#include "ruby/internal/stdbool.h"
+#include "ruby/internal/value_type.h"
+
+/**
+ * @private
+ *
+ * @deprecated  This macro once was a thing in the old days, but makes no sense
+ *              any  longer today.   Exists  here  for backwards  compatibility
+ *              only.  You can safely forget about it.
+ */
+#define HAVE_TYPE_RB_DATA_TYPE_T     1
+
+/**
+ * @private
+ *
+ * @deprecated  This macro once was a thing in the old days, but makes no sense
+ *              any  longer today.   Exists  here  for backwards  compatibility
+ *              only.  You can safely forget about it.
+ */
+#define HAVE_RB_DATA_TYPE_T_FUNCTION 1
+
+/**
+ * @private
+ *
+ * @deprecated  This macro once was a thing in the old days, but makes no sense
+ *              any  longer today.   Exists  here  for backwards  compatibility
+ *              only.  You can safely forget about it.
+ */
+#define HAVE_RB_DATA_TYPE_T_PARENT   1
+
+/**
+ * This is a  value you can set to  ::rb_data_type_struct::dfree.  Setting this
+ * means the data was allocated using ::ruby_xmalloc() (or variants), and shall
+ * be freed using ::ruby_xfree().
+ *
+ * @warning  Do not  use this  if you  want to use  system malloc,  because the
+ *           system  and  Ruby  might  or  might  not  share  the  same  malloc
+ *           implementation.
+ */
+#define RUBY_TYPED_DEFAULT_FREE      RUBY_DEFAULT_FREE
+
+/**
+ * This is a  value you can set to  ::rb_data_type_struct::dfree.  Setting this
+ * means the data  is managed by someone else, like,  statically allocated.  Of
+ * course you are on your own then.
+ */
+#define RUBY_TYPED_NEVER_FREE        RUBY_NEVER_FREE
+
+/**
+ * Convenient casting macro.
+ *
+ * @param   obj  An object, which is in fact an ::RTypedData.
+ * @return  The passed object casted to ::RTypedData.
+ */
+#define RTYPEDDATA(obj)              RBIMPL_CAST((struct RTypedData *)(obj))
+
+/**
+ * Convenient getter macro.
+ *
+ * @param   v  An object, which is in fact an ::RTypedData.
+ * @return  The passed object's ::RTypedData::data field.
+ */
+#define RTYPEDDATA_DATA(v)           (RTYPEDDATA(v)->data)
+
+/** @old{rb_check_typeddata} */
+#define Check_TypedStruct(v, t)      \
+    rb_check_typeddata(RBIMPL_CAST((VALUE)(v)), (t))
+
+/** @cond INTERNAL_MACRO */
+#define RTYPEDDATA_P                 RTYPEDDATA_P
+#define RTYPEDDATA_TYPE              RTYPEDDATA_TYPE
+#define RUBY_TYPED_FREE_IMMEDIATELY  RUBY_TYPED_FREE_IMMEDIATELY
+#define RUBY_TYPED_FROZEN_SHAREABLE  RUBY_TYPED_FROZEN_SHAREABLE
+#define RUBY_TYPED_WB_PROTECTED      RUBY_TYPED_WB_PROTECTED
+#define RUBY_TYPED_PROMOTED1         RUBY_TYPED_PROMOTED1
+/** @endcond */
+
+/**
+ * @private
+ *
+ * Bits for rb_data_type_struct::flags.
+ */
+enum
+RBIMPL_ATTR_FLAG_ENUM()
+rbimpl_typeddata_flags {
+    /**
+     * This flag has something to do  with Ruby's global interpreter lock.  For
+     * maximum  safety, Ruby  locks  the  entire VM  during  GC.  However  your
+     * callback functions  could unintentionally  unlock it, for  instance when
+     * they try to flush an IO  buffer.  Such operations are dangerous (threads
+     * then  run alongside  of GC).   By  default, to  prevent those  scenario,
+     * callbacks are deferred until the GC engine is 100% sure threads can run.
+     * This flag skips  that; structs with it are deallocated  during the sweep
+     * phase.
+     *
+     * Using this  flag needs deep understanding  of both GC and  threads.  You
+     * would better leave it unspecified.
+     */
+    RUBY_TYPED_FREE_IMMEDIATELY = 1,
+
+    /**
+     * This flag has something to do with Ractor.  Multiple Ractors run without
+     * protecting each  other.  Sharing  an object  among Ractors  is basically
+     * dangerous,  disabled by  default.   This  flag is  used  to bypass  that
+     * restriction.  but  setting it is not  enough.  In addition to  do so, an
+     * object    also    has    to    be   frozen,    and    be    passed    to
+     * rb_ractor_make_shareable() before being  actually shareable.  Of course,
+     * you have to manually prevent race conditions then.
+     *
+     * Using this  flag needs deep understanding  of multithreaded programming.
+     * You would better leave it unspecified.
+     */
+    RUBY_TYPED_FROZEN_SHAREABLE = RUBY_FL_SHAREABLE,
+
+    /**
+     * This flag  has something to do  with our garbage collector.   These days
+     * ruby  objects are  "generational".  There  are those  who are  young and
+     * those who are old.  Young objects are prone to die; monitored relatively
+     * extensively by  the garbage  collector.  OTOH old  objects tend  to live
+     * longer.  They  are relatively rarely considered.   This basically works.
+     * But there is one  tweak that has to be exercised.   When an elder object
+     * has reference(s)  to younger  one(s), that  referenced objects  must not
+     * die.  In order  to detect additions of such  references, old generations
+     * are  protected by  write  barriers.   It is  a  very  difficult hack  to
+     * appropriately  insert  write  barriers everywhere.   This  mechanism  is
+     * disabled by default for 3rd party  extensions (they never get aged).  By
+     * specifying this  flag you  can enable the  generational feature  to your
+     * data structure.  Of  course, you have to manually  insert write barriers
+     * then.
+     *
+     * Using this  flag needs deep understanding  of GC internals, often at the
+     * level of source code.  You would better leave it unspecified.
+     */
+    RUBY_TYPED_WB_PROTECTED     = RUBY_FL_WB_PROTECTED, /* THIS FLAG DEPENDS ON Ruby version */
+
+    /**
+     * This flag  is mysterious.  It seems  nobody is currently using  it.  The
+     * intention of this flag is also unclear.  We need further investigations.
+     */
+    RUBY_TYPED_PROMOTED1        = RUBY_FL_PROMOTED1     /* THIS FLAG DEPENDS ON Ruby version */
+};
+
+/**
+ * This  is the  struct that  holds necessary  info for  a struct.   It roughly
+ * resembles a Ruby level class;  multiple objects can share a ::rb_data_type_t
+ * instance.
+ */
+typedef struct rb_data_type_struct rb_data_type_t;
+
+/** @copydoc rb_data_type_t */
+struct rb_data_type_struct {
+
+    /**
+     * Name of  structs of this  kind.  This  is used for  diagnostic purposes.
+     * This has  to be unique  in the  process, but doesn't  has to be  a valid
+     * C/Ruby identifier.
+     */
+    const char *wrap_struct_name;
+
+    /** Function pointers.  Resembles C++ `vtbl`.*/
+    struct {
+
+        /**
+         * This function  is called when  the object is experiencing  GC marks.
+         * If it  contains references to other  Ruby objects, you need  to mark
+         * them also.  Otherwise GC will smash your data.
+         *
+         * @see      rb_gc_mark()
+         * @warning  This  is called  during GC  runs.  Object  allocations are
+         *           impossible at that moment (that is why GC runs).
+         */
+        RUBY_DATA_FUNC dmark;
+
+        /**
+         * This function is called when the object is no longer used.  You need
+         * to do whatever necessary to avoid memory leaks.
+         *
+         * @warning  This  is called  during GC  runs.  Object  allocations are
+         *           impossible at that moment (that is why GC runs).
+         */
+        RUBY_DATA_FUNC dfree;
+
+        /**
+         * This function is to query the size of the underlying memory regions.
+         *
+         * @internal
+         *
+         * This  function  has  only  one   usage,  which  is  form  inside  of
+         * `ext/objspace`.
+         */
+        size_t (*dsize)(const void *);
+
+        /**
+         * This  function  is  called  when  the  object  is  relocated.   Like
+         * ::rb_data_type_struct::dmark, you need to  update references to Ruby
+         * objects inside of your structs.
+         *
+         * @see      rb_gc_location()
+         * @warning  This  is called  during GC  runs.  Object  allocations are
+         *           impossible at that moment (that is why GC runs).
+         */
+        RUBY_DATA_FUNC dcompact;
+
+        /**
+         * This field  is reserved for future  extension.  For now, it  must be
+         * filled with zeros.
+         */
+        void *reserved[1]; /* For future extension.
+                              This array *must* be filled with ZERO. */
+    } function;
+
+    /**
+     * Parent  of  this  class.   Sometimes  C  structs  have  inheritance-like
+     * relationships.  An example is `struct sockaddr`  and its family.  If you
+     * design such things,  make ::rb_data_type_t for each of  them and connect
+     * using this field.   Ruby can then transparently cast your  data back and
+     * forth when you call #TypedData_Get_Struct().
+     *
+     * ```CXX
+     * struct parent { };
+     * static inline const rb_data_type_t parent_type = {
+     *     .wrap_struct_name = "parent",
+     * };
+     *
+     * struct child: public parent { };
+     * static inline const rb_data_type_t child_type = {
+     *     .wrap_struct_name = "child",
+     *     .parent = &parent_type,
+     * };
+     *
+     * // This function can take both parent_class and child_class.
+     * static inline struct parent *
+     * get_parent(VALUE v)
+     * {
+     *     struct parent *p;
+     *     TypedData_Get_Struct(v, parent_type, struct parent, p);
+     *     return p;
+     * }
+     * ```
+     */
+    const rb_data_type_t *parent;
+
+    /**
+     * Type-specific static data.   This area can be used for  any purpose by a
+     * programmer who define the type.  Ruby does not manage this at all.
+     */
+    void *data;        /* This area can be used for any purpose
+                          by a programmer who define the type. */
+
+    /**
+     * Type-specific behavioural  characteristics.  This is a  bitfield.  It is
+     * an EXTREMELY  WISE IDEA to  leave this field  blank.  It is  designed so
+     * that setting  zero is the safest  thing to do.   If you risk to  set any
+     * bits on, you have to know exactly what you are doing.
+     *
+     * @internal
+     *
+     * Why it has to be a ::VALUE?  @shyouhei doesn't understand the design.
+     */
+    VALUE flags;       /* RUBY_FL_WB_PROTECTED */
+};
+
+/**
+ * "Typed" user data.   By using this, extension libraries can  wrap a C struct
+ * to make it visible from Ruby.  For  instance if you have a `struct timeval`,
+ * and you want users to use it,
+ *
+ * ```CXX
+ * static inline const rb_data_type_t timeval_type = {
+ *     // Note that unspecified fields are 0-filled by default.
+ *     .wrap_struct_name = "timeval",
+ *     .function = {
+ *         .dmark = nullptr,                 // no need to mark
+ *         .dfree = RUBY_TYPED_DEFAULT_FREE, // use ruby_xfree()
+ *         .dsize = [](auto) {
+ *             return sizeof(struct timeval);
+ *         },
+ *     },
+ * };
+ *
+ * extern "C" void
+ * Init_timeval(void)
+ * {
+ *     auto klass = rb_define_class("YourName", rb_cObject);
+ *
+ *     rb_define_alloc_func(klass, [](auto klass) {
+ *         struct timeval *t;
+ *         auto ret = TypedData_Make_Struct(
+ *            klass, struct timeval, &timeval_type, t);
+ *
+ *         if (auto i = gettimeofday(t, nullptr); i == -1) {
+ *             rb_sys_fail("gettimeofday(3)");
+ *         }
+ *         else {
+ *             return ret;
+ *         }
+ *     });
+ * }
+ * ```
+ */
+struct RTypedData {
+
+    /** The part that all ruby objects have in common. */
+    struct RBasic basic;
+
+    /**
+     * This field  stores various  information about how  Ruby should  handle a
+     * data.   This roughly  resembles a  Ruby level  class (apart  from method
+     * definition etc.)
+     */
+    const rb_data_type_t *type;
+
+    /**
+     * This has to be always 1.
+     *
+     * @internal
+     *
+     * Why, then, this is not a const ::VALUE?
+     */
+    VALUE typed_flag;
+
+    /** Pointer to the actual C level struct that you want to wrap. */
+    void *data;
+};
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+RBIMPL_ATTR_NONNULL((3))
+/**
+ * This is the primitive way to wrap an existing C struct into ::RTypedData.
+ *
+ * @param[in]  klass          Ruby level class of the returning object.
+ * @param[in]  datap          Pointer to the target C struct.
+ * @param[in]  type           The characteristics of the passed data.
+ * @exception  rb_eTypeError  `klass` is not a class.
+ * @exception  rb_eNoMemError  Out of memory.
+ * @return     An allocated object that wraps `datap`.
+ */
+VALUE rb_data_typed_object_wrap(VALUE klass, void *datap, const rb_data_type_t *type);
+
+/**
+ * Identical  to rb_data_typed_object_wrap(),  except it  allocates a  new data
+ * region internally instead of taking an existing one.  The allocation is done
+ * using ruby_calloc().  Hence it makes  no sense for `type->function.dfree` to
+ * be anything other than ::RUBY_TYPED_DEFAULT_FREE.
+ *
+ * @param[in]  klass          Ruby level class of the returning object.
+ * @param[in]  size           Requested size of memory to allocate.
+ * @param[in]  type           The characteristics of the passed data.
+ * @exception  rb_eTypeError  `klass` is not a class.
+ * @exception  rb_eNoMemError  Out of memory.
+ * @return     An allocated object that wraps a new `size` byte region.
+ */
+VALUE rb_data_typed_object_zalloc(VALUE klass, size_t size, const rb_data_type_t *type);
+
+/**
+ * Checks for the domestic relationship between the two.
+ *
+ * @param[in]  child   A data type supposed to be a child of `parent`.
+ * @param[in]  parent  A data type supposed to be a parent of `child`.
+ * @retval     true    `child` is a descendent of `parent`.
+ * @retval     false   Otherwise.
+ *
+ * @internal
+ *
+ * You can path NULL to both arguments, don't know what that means though.
+ */
+int rb_typeddata_inherited_p(const rb_data_type_t *child, const rb_data_type_t *parent);
+
+/**
+ * Checks if the given object is of given kind.
+ *
+ * @param[in]  obj        An instance of ::RTypedData.
+ * @param[in]  data_type  Expected data type of `obj`.
+ * @retval     true       `obj` is of `data_type`.
+ * @retval     false      Otherwise.
+ */
+int rb_typeddata_is_kind_of(VALUE obj, const rb_data_type_t *data_type);
+
+/**
+ * Identical to rb_typeddata_is_kind_of(), except  it raises exceptions instead
+ * of returning false.
+ *
+ * @param[in]  obj            An instance of ::RTypedData.
+ * @param[in]  data_type      Expected data type of `obj`.
+ * @exception  rb_eTypeError  obj is not of `data_type`.
+ * @return     Unwrapped C struct that `obj` holds.
+ * @post       Upon successful return `obj`'s type is guaranteed `data_type`.
+ */
+void *rb_check_typeddata(VALUE obj, const rb_data_type_t *data_type);
+RBIMPL_SYMBOL_EXPORT_END()
+
+/**
+ * Converts sval, a pointer to your struct, into a Ruby object.
+ *
+ * @param      klass          A ruby level class.
+ * @param      data_type      The type of `sval`.
+ * @param      sval           A pointer to your struct.
+ * @exception  rb_eTypeError  `klass` is not a class.
+ * @exception  rb_eNoMemError  Out of memory.
+ * @return     A created Ruby object.
+ */
+#define TypedData_Wrap_Struct(klass,data_type,sval)\
+  rb_data_typed_object_wrap((klass),(sval),(data_type))
+
+/**
+ * @private
+ *
+ * This is  an implementation  detail of #TypedData_Make_Struct.   People don't
+ * use it directly.
+ *
+ * @param  result     Variable name of created Ruby object.
+ * @param  klass      Ruby level class of the object.
+ * @param  type       Type name of the C struct.
+ * @param  size       Size of the C struct.
+ * @param  data_type  The data type describing `type`.
+ * @param  sval       Variable name of created C struct.
+ */
+#define TypedData_Make_Struct0(result, klass, type, size, data_type, sval) \
+    VALUE result = rb_data_typed_object_zalloc(klass, size, data_type);    \
+    (sval) = RBIMPL_CAST((type *)RTYPEDDATA_DATA(result));                  \
+    RBIMPL_CAST(/*suppress unused variable warnings*/(void)(sval))
+
+/**
+ * Identical to #TypedData_Wrap_Struct,  except it allocates a  new data region
+ * internally instead of taking an existing  one.  The allocation is done using
+ * ruby_calloc().  Hence  it makes no sense  for `data_type->function.dfree` to
+ * be anything other than ::RUBY_TYPED_DEFAULT_FREE.
+ *
+ * @param      klass          Ruby level class of the object.
+ * @param      type           Type name of the C struct.
+ * @param      data_type      The data type describing `type`.
+ * @param      sval           Variable name of created C struct.
+ * @exception  rb_eTypeError  `klass` is not a class.
+ * @exception  rb_eNoMemError  Out of memory.
+ * @return     A created Ruby object.
+ */
+#ifdef HAVE_STMT_AND_DECL_IN_EXPR
+#define TypedData_Make_Struct(klass, type, data_type, sval) \
+    RB_GNUC_EXTENSION({         \
+        TypedData_Make_Struct0( \
+            data_struct_obj,    \
+            klass,              \
+            type,               \
+            sizeof(type),       \
+            data_type,          \
+            sval);              \
+        data_struct_obj;        \
+    })
+#else
+#define TypedData_Make_Struct(klass, type, data_type, sval) \
+    rb_data_typed_object_make(        \
+        (klass),                      \
+        (data_type),                  \
+        RBIMPL_CAST((void **)&(sval)), \
+        sizeof(type))
+#endif
+
+/**
+ * Obtains a C struct from inside of a wrapper Ruby object.
+ *
+ * @param      obj            An instance of ::RTypedData.
+ * @param      type           Type name of the C struct.
+ * @param      data_type      The data type describing `type`.
+ * @param      sval           Variable name of obtained C struct.
+ * @exception  rb_eTypeError  `obj` is not a kind of `data_type`.
+ * @return     Unwrapped C struct that `obj` holds.
+ */
+#define TypedData_Get_Struct(obj,type,data_type,sval) \
+    ((sval) = RBIMPL_CAST((type *)rb_check_typeddata((obj), (data_type))))
+
+RBIMPL_ATTR_PURE()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * @private
+ *
+ * This  is an  implementation detail  of  Check_Type().  People  don't use  it
+ * directly.
+ *
+ * @param[in]  obj    Object in question
+ * @retval     true   `obj` is an instance of ::RTypedData.
+ * @retval     false  `obj` is an instance of ::RData.
+ * @pre        `obj` must be a Ruby object of ::RUBY_T_DATA.
+ */
+static inline bool
+rbimpl_rtypeddata_p(VALUE obj)
+{
+    return RTYPEDDATA(obj)->typed_flag == 1;
+}
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/**
+ * Checks whether the passed object is ::RTypedData or ::RData.
+ *
+ * @param[in]  obj    Object in question
+ * @retval     true   `obj` is an instance of ::RTypedData.
+ * @retval     false  `obj` is an instance of ::RData.
+ * @pre        `obj` must be a Ruby object of ::RUBY_T_DATA.
+ */
+static inline bool
+RTYPEDDATA_P(VALUE obj)
+{
+#if RUBY_DEBUG
+    if (RB_UNLIKELY(! RB_TYPE_P(obj, RUBY_T_DATA))) {
+        Check_Type(obj, RUBY_T_DATA);
+        RBIMPL_UNREACHABLE_RETURN(false);
+    }
+#endif
+
+    return rbimpl_rtypeddata_p(obj);
+}
+
+RBIMPL_ATTR_PURE_UNLESS_DEBUG()
+RBIMPL_ATTR_ARTIFICIAL()
+/* :TODO: can this function be __attribute__((returns_nonnull)) or not? */
+/**
+ * Queries for the type of given object.
+ *
+ * @param[in]  obj    Object in question
+ * @return     Data type struct that corresponds to `obj`.
+ * @pre        `obj` must be an instance of ::RTypedData.
+ */
+static inline const struct rb_data_type_struct *
+RTYPEDDATA_TYPE(VALUE obj)
+{
+#if RUBY_DEBUG
+    if (RB_UNLIKELY(! RTYPEDDATA_P(obj))) {
+        rb_unexpected_type(obj, RUBY_T_DATA);
+        RBIMPL_UNREACHABLE_RETURN(NULL);
+    }
+#endif
+
+    return RTYPEDDATA(obj)->type;
+}
+
+/**
+ * While  we don't  stop  you from  using  this  function, it  seems  to be  an
+ * implementation  detail of  #TypedData_Make_Struct, which  is preferred  over
+ * this one.
+ *
+ * @param[in]  klass      Ruby level class of the returning object.
+ * @param[in]  type       The data type
+ * @param[out] datap      Return pointer.
+ * @param[in]  size       Size of the C struct.
+ * @exception  rb_eTypeError  `klass` is not a class.
+ * @exception  rb_eNoMemError  Out of memory.
+ * @return     A created Ruby object.
+ * @post       `*datap` points to the C struct wrapped by the returned object.
+ */
+static inline VALUE
+rb_data_typed_object_make(VALUE klass, const rb_data_type_t *type, void **datap, size_t size)
+{
+    TypedData_Make_Struct0(result, klass, void, size, type, *datap);
+    return result;
+}
+
+RBIMPL_ATTR_DEPRECATED(("by: rb_data_typed_object_wrap"))
+/** @deprecated  This function was renamed to rb_data_typed_object_wrap(). */
+static inline VALUE
+rb_data_typed_object_alloc(VALUE klass, void *datap, const rb_data_type_t *type)
+{
+    return rb_data_typed_object_wrap(klass, datap, type);
+}
+
+#endif /* RBIMPL_RTYPEDDATA_H */