Add a few more ed commands.

LICENSE.md

@@ -627,7 +627,7 @@ attach them to the start of each source file to most effectively state
 the exclusion of warranty; and each file should have at least the
 "copyright" line and a pointer to where the full notice is found.
 
-        Crib - Text editing tools.
+        BEd - Better Ed.
         Copyright (C) 2026 Syed (me@syedm.dev)
 
         This program is free software: you can redistribute it and/or modify

Makefile

@@ -6,8 +6,8 @@ INCLUDE_DIR := include
 CXX ?= g++
 CC ?= gcc
 
-TARGET_DEBUG := $(BIN_DIR)/crib-dbg
-TARGET_RELEASE := $(BIN_DIR)/crib
+TARGET_DEBUG := $(BIN_DIR)/bed-dbg
+TARGET_RELEASE := $(BIN_DIR)/bed
 
 PCH_DIR_DEBUG := $(OBJ_DIR)/debug/pch
 PCH_DIR_RELEASE := $(OBJ_DIR)/release/pch

README.md

@@ -1,37 +1,4 @@
-# Crib
-
-A set of text editing tools (still in early development).
-
-### Modules
-
-#### `Vase`
-
-Vase is a avl piece tree like structure which handles loading, insertion, erasure, regex searching, regex replacing etc.
-<br/>
-done.
-
-#### `hl`
-
-`hl` is a stateful super fast syntax highlighter.
-<br/>
-Not done yet.
-
-#### `lsp`
-
-`lsp` is a generic plug for lsp's.
-<br/>
-<br/>
-It should support:
-- Lsp over ssh or stdin/out or unix sockets etc.
-- Handling multiple lsps at once (including over a single file.)
-- Converting offsets encoding between utf16 - utf8 according to lsp standards.
-- Loading lsp features etc. automatically.
-- Error handling.
-- And more.
-
-Not done yet.
-
-### BEd
+## BEd
 
 Better ed.<br/>
 An ed implementation (mostly posix compliant) but with:
@@ -65,11 +32,42 @@ An ed implementation (mostly posix compliant) but with:
 - File operations, directory & files listing.
 - Nerdfonts & themable colorized outputs.
 - Better address marking with ranges.
+- text copy/paste & registers.
 - & A lot more cool stuff.
 
-#### Implementation status:
+### Implementation status:
 
 - Internal buffer:
     - Super fast and memory efficient buffer implementation done.
     - Loading from files/subshell commands done.
 - Most of the posix ed commands except regex ones done.
+
+### Modules
+
+#### `Vase`
+
+Vase is a avl piece tree like structure which handles loading, insertion, erasure, regex searching, regex replacing etc.
+<br/>
+done.
+
+#### `hl`
+
+`hl` is a stateful super fast syntax highlighter.
+<br/>
+mostly done.
+
+#### `lsp`
+
+`lsp` is a generic plug for lsp's.
+<br/>
+<br/>
+It should support:
+- Lsp over ssh or stdin/out or unix sockets etc.
+- Handling multiple lsps at once (including over a single file.)
+- Converting offsets encoding between utf16 - utf8 according to lsp standards.
+- Loading lsp features etc. automatically.
+- Error handling.
+- And more.
+
+Not done yet.
+

flake.nix

@@ -1,5 +1,5 @@
 {
-  description = "Crib - An IDE.";
+  description = "BEd - Better Ed.";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
@@ -47,17 +47,16 @@
         '';
       };
 
-      crib = pkgs.stdenv.mkDerivation {
-        pname = "crib";
+      bed = pkgs.stdenv.mkDerivation {
+        pname = "bed";
         version = "0.1.0";
 
         src = ./.;
 
         nativeBuildInputs = with hostPkgs; [
+          bash
           pkg-config
           gnumake
-          xxd
-          bash
           findutils
           binutils
         ];
@@ -78,19 +77,19 @@
 
         installPhase = ''
           mkdir -p $out/bin
-          cp bin/crib $out/bin/crib
+          cp bin/bed $out/bin/bed
         '';
       };
     in
     {
       packages.${system} = {
-        default = crib;
-        crib = crib;
+        default = bed;
+        bed = bed;
         mruby = mruby;
       };
 
       devShells.${system}.default = hostPkgs.mkShell {
-        inputsFrom = [ crib ];
+        inputsFrom = [ bed ];
 
         packages = [
           hostPkgs.clang-tools
@@ -99,7 +98,6 @@
           hostPkgs.gnumake
           hostPkgs.bear
           hostPkgs.ruby
-          hostPkgs.xxd
           hostPkgs.gdb
           hostPkgs.binutils
           hostPkgs.findutils

include/bed.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include "definitions.h"
+#include "internal/buffer/buffer.h"
+#include "internal/commands/commands.h"
+#include "internal/commands/suffixes.h"
+#include "internal/marks/marks.h"
+#include "pch.h"
+
+namespace bed {
+struct BEd {
+  internal::trie::Trie<internal::commands::Command> commands;
+  internal::commands::Command no_op;
+  internal::commands::Command eof_op;
+  std::array<std::optional<internal::commands::Suffix>, 26> suffixes;
+
+  bool help_mode = false;
+  std::string last_help = "";
+  bool prompt_mode = true;
+  std::function<std::string(BEd &)> prompt = nullptr;
+  bool suppress_mode = false;
+  std::string last_regex = "";
+
+  std::unordered_map<std::string, internal::buffer::Buffer *> buffers;
+  internal::buffer::Buffer *active;
+
+  BEd(std::vector<std::string> args);
+  ~BEd();
+  void handle(std::string_view cmd, bool eof);
+  void run();
+};
+} // namespace bed

include/cli.h

@@ -1,22 +0,0 @@
-#pragma once
-
-#include "pch.h"
-
-namespace crib::cli {
-struct Command {
-  void (*run)(std::vector<std::string>);
-  std::string (*summary)();
-  void (*help)();
-};
-
-struct cli_error : std::runtime_error {
-  int exit_code;
-  cli_error(std::string msg, int code)
-      : std::runtime_error(std::move(msg)), exit_code(code) {}
-};
-
-extern bool use_colors;
-void help();
-int execute(const std::string &name, const Command &cmd, int argc, char *argv[]);
-int run(int argc, char *argv[]);
-} // namespace crib::cli

include/commands/bed/bed.h

@@ -1,99 +0,0 @@
-#pragma once
-
-#include "internal/vase/vase.h"
-#include "pch.h"
-
-namespace crib::commands::bed {
-struct bed_error : std::runtime_error {
-  bed_error(const char *msg) : std::runtime_error(msg) {}
-};
-
-struct Command {
-  enum struct Type : uint8_t {
-    Invalid,
-    Quit,
-    ForceQuit,
-    PromptToggle,
-    HelpToggle,
-    Help,
-    Print,
-    List,
-    Number,
-    Append,
-    Insert,
-    Change,
-    Delete,
-    Write,
-    Join,
-    Mark,
-    Edit,
-    ForceEdit,
-    Filename,
-    Dump,
-    None
-  } type;
-
-  struct Address {
-    enum struct Type : uint8_t {
-      None,
-      Current,
-      Last,
-      Number,
-      Mark,
-      SearchForward,
-      SearchBackward
-    } type;
-    int64_t number = 0;
-    std::string regex = "";
-    int64_t offset = 0;
-    char mark = '\0';
-  };
-
-  Address start{};
-  Address end{};
-  static constexpr uint8_t SEMICOLON = 0b01;
-  static constexpr uint8_t RANGE = 0b10;
-  uint8_t address_flags = 0;
-  char suffix = '\0';
-  std::string argument;
-};
-
-struct BEd {
-  crib::internal::vase::Vase vase;
-  uint64_t line = 0;
-  bool modified = false;
-  bool quitting = false;
-  bool editing = false;
-  uint64_t marks[26]{0};
-  std::string last_regex = "";
-  bool help_mode = false;
-  bool suppress_mode = false;
-  bool prompt_mode = false;
-  std::string prompt = "*";
-  std::filesystem::path save_path = "";
-  std::string last_message = "";
-
-  BEd(std::string file_path, bool suppress_mode, std::string prompt_)
-      : vase("/tmp"), suppress_mode(suppress_mode), prompt(prompt_) {
-    if (prompt == "")
-      prompt = "*";
-    else
-      prompt_mode = true;
-    if (file_path != "")
-      handle("E " + file_path, false);
-  }
-
-  void parse_address(std::string_view cmd, uint64_t &i, Command::Address &addr);
-  void resolve_address(Command::Address addr, uint64_t *out_line);
-  Command parse(std::string cmd, bool eof);
-  void append(std::string text, uint64_t line);
-  void remove(uint64_t start_line, uint64_t end_line);
-  std::string list_string(std::string_view s);
-  void join(uint64_t start_line, uint64_t end_line);
-  bool handle(std::string cmd, bool eof);
-};
-
-std::string summary();
-void help();
-void run(std::vector<std::string>);
-} // namespace crib::commands::bed

include/definitions.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include "internal/vase/vase.h"
+#include "pch.h"
+
+namespace bed {
+struct fatal_error : std::runtime_error {
+  uint8_t code;
+  fatal_error(std::string msg, uint8_t code)
+      : std::runtime_error(msg), code(code) {}
+};
+
+struct ed_error : std::runtime_error {
+  ed_error(std::string msg) : std::runtime_error(msg) {}
+};
+
+struct BEd;
+} // namespace bed

include/internal/address/address.h

@@ -0,0 +1,115 @@
+#pragma once
+
+#include "definitions.h"
+#include "internal/generic.h"
+#include "pch.h"
+
+namespace bed::internal::address {
+struct address_error : ed_error {
+  address_error(const char *msg) : ed_error(msg) {}
+};
+
+struct Address {
+  // % refers to range of whatever was resulted from the previous modification.
+  // it expands in theory to a Num,Num and so can be followed by chaining more adresses the ed way.
+  // this is handled and resolved by the handle function,
+  // the constuctor and resolve etc. are also only called in the handle function,
+  // i.e. handle is the only public facing API from this namespace & class for now.
+  //
+  // in case of any issue an instance of address_error(const char *) is thrown.
+
+  struct Result {
+    std::array<uint64_t, 2> data{};
+    uint8_t size{0};
+    std::span<const uint64_t> span(uint8_t max = UINT8_MAX) const {
+      return {data.data(), std::min(size, max)};
+    }
+  };
+
+  struct None {};
+
+  // Posix ed types of addressing.
+  struct Current {}; // .
+
+  struct Last {}; // $
+
+  struct Number { // n
+    uint64_t i;
+  };
+
+  struct Mark { // 'm
+    char m;
+  };
+
+  struct RegexLine { // /re/ or ?re?
+    internal::Direction dir;
+    std::string re;
+  };
+
+  // BEd Extended types of addressing.
+  struct Regex {             // &/re/ or &?re?
+    internal::Direction dir; // returns next/previous line containing the regex
+    std::string re;          // (not only if it matches full line)
+  };
+
+  struct Diagnostic { // #n# for diagnostic number n. (From lsp.)
+    uint16_t n;
+  };
+
+  struct DiagnosticNext { // ^ or % for previous/next diagnostic
+    internal::Direction dir;
+  };
+
+  struct SymbolDefinition { // <sym> goto symbol definition. (From lsp or using internal language parsers)
+    std::string sym;
+  };
+
+  struct SymbolReference { // <sym:n> goto nth symbol reference
+    uint16_t n;
+    std::string sym;
+  };
+
+  struct SymbolReferenceNext { // >sym> or <sym<
+    internal::Direction dir;   // goto next or previous symbol reference
+    std::string sym;
+  };
+
+  struct Block { // [ or ] goto start/end of containing block.
+    internal::Direction dir;
+  };
+
+  struct Scripted {   // (function_name:arguments)
+    std::string func; // Calls ruby mapping with name giving the argument as string.
+    std::string arg;  // resolves to line number returned by function (or throws error).
+                      // The mruby runtime also has the full context of the file and extentions etc.
+  };
+
+  std::variant<
+    std::monostate,
+    None,
+    Current,
+    Last,
+    Number,
+    Mark,
+    RegexLine,
+    Regex,
+    Diagnostic,
+    DiagnosticNext,
+    SymbolDefinition,
+    SymbolReference,
+    SymbolReferenceNext,
+    Block,
+    Scripted>
+    base{};
+
+  // they can then be followed by any number of +n or -n etc accumulating in.
+  int64_t offset = 0;
+
+  Address(std::string &cmd, uint64_t &i);
+  Address() = default;
+
+  uint64_t resolve(BEd &ctx);
+
+  static Result handle(BEd &ctx, std::string &cmd, uint64_t &i);
+};
+} // namespace bed::internal::address

include/internal/buffer/buffer.h

@@ -0,0 +1,34 @@
+#pragma once
+
+#include "definitions.h"
+#include "internal/marks/marks.h"
+#include "pch.h"
+
+namespace bed::internal::buffer {
+struct Buffer {
+  internal::vase::Vase vase;
+  internal::marks::MarksEngine marks;
+  uint64_t line = 0;
+  bool modified;
+  std::filesystem::path save_path = "";
+  struct {
+    uint64_t start{0};
+    uint64_t end{0};
+  } prev_range;
+
+  Buffer();
+  Buffer(std::string command);
+  Buffer(std::filesystem::path path);
+
+  ~Buffer() = default;
+
+  void load(std::string command);
+  void load(std::filesystem::path path);
+  void jump(uint64_t n_line);
+  void join(uint64_t start_line, uint64_t end_line);
+  void remove(uint64_t start_line, uint64_t end_line);
+  void append(std::string text, uint64_t line);
+  void print(uint64_t start_line, uint64_t end_line);
+  std::string list_string(std::string_view s);
+};
+} // namespace bed::internal::buffer

include/internal/commands/commands.h

@@ -0,0 +1,30 @@
+#pragma once
+
+#include "definitions.h"
+#include "internal/trie/trie.h"
+#include "pch.h"
+
+namespace bed::internal::commands {
+struct Command {
+  enum struct AddressMode : uint8_t {
+    None,
+    Single,
+    Range
+  } address_mode;
+
+  enum struct SuffixKind : uint8_t {
+    None,
+    Suffix,
+    Argument,
+    Continuation
+  } suffix;
+
+  std::string desc;
+
+  bool accept_zero;
+
+  void (*handle)(BEd &, std::span<const uint64_t>, std::string_view);
+
+  static void register_posix(BEd &ctx);
+};
+} // namespace bed::internal::commands

include/internal/commands/suffixes.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include "definitions.h"
+#include "pch.h"
+
+namespace bed::internal::commands {
+struct Suffix {
+  std::string desc;
+  void (*handle)(BEd &);
+
+  static void register_suffixes(BEd &ctx);
+};
+} // namespace bed::internal::commands

include/internal/generic.h

@@ -1,9 +1,8 @@
 #pragma once
 
-#include "../shard.h"
 #include "pch.h"
 
-namespace crib::internal::vase {
+namespace bed::internal {
 enum struct Direction : uint8_t {
   Forward,
   Backward

include/internal/marks/marks.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#include "pch.h"
+
+namespace bed::internal::marks {
+struct MarksEngine {};
+} // namespace bed::internal::marks

include/internal/trie/trie.h

@@ -0,0 +1,246 @@
+#pragma once
+
+#include "pch.h"
+
+namespace bed::internal::trie {
+template <typename T = void>
+struct Trie {
+  using V = std::conditional_t<std::is_void_v<T>, std::monostate, T>;
+
+  struct Node {
+    std::string edge;
+    std::optional<V> value{};
+    std::vector<Node *> children;
+    Node(std::string e = {}) : edge(std::move(e)) {}
+    ~Node() {
+      for (auto *c : children)
+        delete c;
+    };
+  } root;
+
+  bool case_sensitive;
+
+  Trie(bool cs = true) : case_sensitive(cs) {}
+
+  void insert(std::string_view key)
+    requires std::is_void_v<T>
+  {
+    _insert(key, std::monostate{});
+  }
+
+  void insert(std::string_view key, V el)
+    requires(!std::is_void_v<T>)
+  {
+    _insert(key, std::move(el));
+  }
+
+  void _insert(std::string_view key, V &&el) {
+    Node *current = &root;
+    uint64_t pos = 0;
+    while (pos < key.size()) {
+      Node *child = find_child(*current, key[pos]);
+      if (!child) {
+        auto *node = new Node(std::string(key.substr(pos)));
+        node->value = std::move(el);
+        current->children.push_back(node);
+        return;
+      }
+      const auto common = common_prefix(child->edge, key.substr(pos));
+      if (common == child->edge.size()) {
+        pos += common;
+        current = child;
+        continue;
+      }
+      auto *split = new Node(child->edge.substr(0, common));
+      child->edge.erase(0, common);
+      split->children.push_back(child);
+      current->children.erase(
+        std::find(current->children.begin(), current->children.end(), child)
+      );
+      current->children.push_back(split);
+      pos += common;
+      if (pos == key.size()) {
+        split->value = std::move(el);
+        return;
+      }
+      auto *node = new Node(std::string(key.substr(pos)));
+      node->value = std::move(el);
+      split->children.push_back(node);
+      return;
+    }
+    current->value = std::move(el);
+  }
+
+  void remove(std::string_view key) {
+    _remove(root, key, 0);
+  }
+
+  bool _remove(Node &node, std::string_view key, uint64_t pos) {
+    if (pos == key.size()) {
+      if (!node.value)
+        return false;
+      node.value.reset();
+      return true;
+    }
+    Node *child = find_child(node, key[pos]);
+    if (!child)
+      return false;
+    const auto remaining = key.substr(pos);
+    const auto common = common_prefix(child->edge, remaining);
+    if (common != child->edge.size())
+      return false;
+    const auto child_pos = pos + common;
+    if (!_remove(*child, key, child_pos))
+      return false;
+    if (!child->value && child->children.empty()) {
+      auto it = std::find(
+        node.children.begin(),
+        node.children.end(),
+        child
+      );
+      node.children.erase(it);
+      delete child;
+      return true;
+    }
+    if (!child->value && child->children.size() == 1) {
+      Node *grandchild = child->children.front();
+      child->edge += grandchild->edge;
+      child->value = std::move(grandchild->value);
+      child->children = std::move(grandchild->children);
+      grandchild->children.clear();
+      delete grandchild;
+    }
+    return true;
+  }
+
+  std::vector<std::string> search(std::string_view prefix) {
+    std::vector<std::string> result;
+    Node *current = &root;
+    std::string key;
+    uint64_t pos = 0;
+    while (pos < prefix.size()) {
+      Node *child = find_child(*current, prefix[pos]);
+      if (!child)
+        return result;
+      const auto remaining = prefix.substr(pos);
+      const auto common = common_prefix(child->edge, remaining);
+      if (common == 0)
+        return result;
+      if (common < child->edge.size()) {
+        if (common == remaining.size()) {
+          key += child->edge;
+          collect(*child, key, result);
+          return result;
+        }
+        return result;
+      }
+      key += child->edge;
+      pos += common;
+      current = child;
+    }
+    collect(*current, key, result);
+    return result;
+  }
+
+  static void collect(
+    const Node &node,
+    std::string &key,
+    std::vector<std::string> &result
+  ) {
+    if (node.value)
+      result.push_back(key);
+    for (auto *child : node.children) {
+      const auto old_size = key.size();
+      key += child->edge;
+      collect(*child, key, result);
+      key.resize(old_size);
+    }
+  }
+
+  uint64_t longest_match(std::string_view input) {
+    Node *current = &root;
+    uint64_t pos = 0;
+    uint64_t longest = 0;
+    if (current->value)
+      longest = 0;
+    while (pos < input.size()) {
+      Node *child = find_child(*current, input[pos]);
+      if (!child)
+        break;
+      const auto remaining = input.substr(pos);
+      const auto common = common_prefix(child->edge, remaining);
+      if (common != child->edge.size())
+        break;
+      pos += common;
+      current = child;
+      if (current->value)
+        longest = pos;
+    }
+    return longest;
+  }
+
+  bool matches(std::string_view key)
+    requires(std::is_void_v<T>)
+  {
+    Node *current = &root;
+    uint64_t pos = 0;
+    while (pos < key.size()) {
+      Node *child = find_child(*current, key[pos]);
+      if (!child)
+        return false;
+      const auto remaining = key.substr(pos);
+      const auto common = common_prefix(child->edge, remaining);
+      if (common != child->edge.size())
+        return false;
+      pos += common;
+      current = child;
+    }
+    return current->value.has_value();
+  }
+
+  std::optional<V> get(std::string_view key)
+    requires(!std::is_void_v<T>)
+  {
+    Node *current = &root;
+    uint64_t pos = 0;
+    while (pos < key.size()) {
+      Node *child = find_child(*current, key[pos]);
+      if (!child)
+        return std::nullopt;
+      const auto remaining = key.substr(pos);
+      const auto common = common_prefix(child->edge, remaining);
+      if (common != child->edge.size())
+        return std::nullopt;
+      pos += common;
+      current = child;
+    }
+    if (!current->value)
+      return std::nullopt;
+    return *current->value;
+  }
+
+  bool equal_char(char a, char b) const {
+    if (case_sensitive)
+      return a == b;
+    return std::tolower((unsigned char)a) == std::tolower((unsigned char)b);
+  }
+
+  uint64_t common_prefix(
+    std::string_view a,
+    std::string_view b
+  ) {
+    const auto n = std::min(a.size(), b.size());
+    uint64_t i = 0;
+    while (i < n && equal_char(a[i], b[i]))
+      ++i;
+    return i;
+  }
+
+  Node *find_child(Node &node, char first) {
+    for (auto *child : node.children)
+      if (equal_char(child->edge.front(), first))
+        return child;
+    return nullptr;
+  }
+};
+} // namespace bed::internal::trie

include/internal/vase/buffer/append.h

@@ -4,7 +4,7 @@
 #include "buffer.h"
 #include "pch.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 struct AppendBuffer : Buffer {
   char *buf = nullptr;
   uint64_t allocated_capacity = 0;
@@ -22,4 +22,4 @@ struct AppendBuffer : Buffer {
 private:
   void grow(uint64_t len);
 };
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

include/internal/vase/buffer/buffer.h

@@ -2,10 +2,10 @@
 
 #include "pch.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 struct Buffer {
   virtual const char *read(uint64_t pos) = 0;
   virtual uint64_t length() = 0;
   virtual ~Buffer() = default;
 };
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

include/internal/vase/buffer/original.h

@@ -3,7 +3,7 @@
 #include "buffer.h"
 #include "pch.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 struct OriginalBuffer : Buffer {
   const char *buf;
   uint64_t len;
@@ -16,4 +16,4 @@ struct OriginalBuffer : Buffer {
   const char *read(uint64_t pos) override;
   uint64_t length() override;
 };
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

include/internal/vase/constants.h

@@ -2,6 +2,6 @@
 
 #include "pch.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 constexpr uint64_t PETAL_SIZE_MAX = 32 * 1024;
 }

include/internal/vase/iterators/line.h

@@ -4,7 +4,7 @@
 #include "pch.h"
 #include "petal.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 struct LineIterator {
   PetalIterator it;
   const char *chunk;
@@ -70,4 +70,4 @@ struct Iterator {
 private:
   LineIterator it;
 };
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

include/internal/vase/iterators/petal.h

@@ -1,10 +1,10 @@
 #pragma once
 
 #include "../shard.h"
-#include "iter.h"
+#include "internal/generic.h"
 #include "pch.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 struct PetalIterator {
   Direction dir;
   Shard *root = nullptr;
@@ -26,4 +26,4 @@ struct PetalIterator {
 private:
   Petal *_next(uint64_t *offset);
 };
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

include/internal/vase/shard.h

@@ -5,7 +5,7 @@
 #include "constants.h"
 #include "pch.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 struct Shard {
   enum struct Kind : uint8_t {
     Branch,
@@ -63,4 +63,4 @@ struct Petal : Shard {
         source(source), pos(pos) {};
 };
 
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

include/internal/vase/vase.h

@@ -7,7 +7,7 @@
 #include "pch.h"
 #include "shard.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 struct Point {
   uint64_t row;
   uint64_t col;
@@ -114,4 +114,4 @@ private:
     std::string_view pattern, Range range, std::string_view options
   );
 };
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

src/bed/handle.cc

@@ -0,0 +1,97 @@
+#include "bed.h"
+#include "internal/address/address.h"
+#include "internal/commands/commands.h"
+
+namespace bed {
+void BEd::handle(std::string_view cmd_, bool eof) {
+  using namespace internal::commands;
+  std::string cmd(cmd_);
+  if (eof) {
+    eof_op.handle(*this, {}, "");
+    return;
+  }
+  uint64_t i = 0;
+  auto skip_space = [&] {
+    while (i < cmd.size() && (cmd[i] == ' ' || cmd[i] == '\t'))
+      ++i;
+  };
+  skip_space();
+  auto addresses = internal::address::Address::handle(*this, cmd, i);
+  if (i >= cmd.size()) {
+    if (!no_op.accept_zero)
+      for (auto l : addresses.span())
+        if (l == 0)
+          throw ed_error("Invalid address given.");
+    switch (no_op.address_mode) {
+    case Command::AddressMode::None:
+      no_op.handle(*this, addresses.span(0), "");
+      break;
+    case Command::AddressMode::Single:
+      no_op.handle(*this, addresses.span(1), "");
+      break;
+    case Command::AddressMode::Range:
+      no_op.handle(*this, addresses.span(2), "");
+      break;
+    }
+    return;
+  }
+  uint64_t len = commands.longest_match(cmd.substr(i));
+  if (len == 0)
+    throw ed_error("Command not found.");
+  std::optional<Command> command_opt = commands.get(cmd.substr(i, len));
+  i += len;
+  if (!command_opt)
+    throw ed_error("Command error.");
+  Command command = command_opt.value();
+  std::string argument;
+  Suffix *suffix = nullptr;
+  switch (command.suffix) {
+  case Command::SuffixKind::None:
+    skip_space();
+    if (i < cmd.size())
+      throw ed_error("Command error.");
+    break;
+  case Command::SuffixKind::Suffix:
+    skip_space();
+    if (i < cmd.size()) {
+      if (suffixes[cmd[i] - 'a'].has_value())
+        suffix = &(suffixes[cmd[i++] - 'a'].value());
+      skip_space();
+      std::cout << i << " " << cmd << std::endl;
+      if (i < cmd.size())
+        throw ed_error("Command error.");
+    }
+    break;
+  case Command::SuffixKind::Argument:
+    if (i < cmd.size()) {
+      if (cmd[i] == ' ' || cmd[i] == '\t')
+        skip_space();
+      else
+        throw ed_error("Command Error.");
+      argument = cmd.substr(i);
+    }
+    break;
+  case Command::SuffixKind::Continuation:
+    argument = cmd.substr(i);
+    break;
+  }
+  if (!command.accept_zero)
+    for (auto l : addresses.span())
+      if (l == 0)
+        throw ed_error("Invalid address given.");
+  switch (command.address_mode) {
+  case Command::AddressMode::None:
+    command.handle(*this, addresses.span(0), argument);
+    break;
+  case Command::AddressMode::Single:
+    command.handle(*this, addresses.span(1), argument);
+    break;
+  case Command::AddressMode::Range:
+    command.handle(*this, addresses.span(2), argument);
+    break;
+  }
+  if (suffix)
+    suffix->handle(*this);
+  return;
+}
+} // namespace bed

src/bed/run.cc

@@ -0,0 +1,53 @@
+#include "bed.h"
+
+namespace bed {
+BEd::BEd(std::vector<std::string> args) {
+  internal::commands::Command::register_posix(*this);
+  internal::commands::Suffix::register_suffixes(*this);
+  std::string prompt_ = "";
+  std::string file = "";
+  bool suppress = false;
+  for (size_t i = 1; i < args.size(); i++) {
+    if (args[i] == "-p") {
+      i++;
+      if (i >= args.size())
+        throw fatal_error("Prompt not specified!", 1);
+      prompt_ = args[i];
+    } else if (args[i] == "-s") {
+      suppress = true;
+    } else {
+      if (file.size())
+        throw fatal_error("Invalid arguments given.", 1);
+      file = args[i];
+    }
+  }
+  if (prompt_ != "")
+    prompt = [p = std::move(prompt_)](BEd &) { return p; };
+  else
+    prompt_mode = false;
+  suppress_mode = suppress;
+  active = new internal::buffer::Buffer();
+  buffers.emplace("0", active);
+  if (file != "")
+    handle("E " + file, false);
+}
+
+BEd::~BEd() {
+  for (auto &[_, buffer] : buffers)
+    delete buffer;
+}
+
+void BEd::run() {
+  while (true) {
+    std::string cmd;
+    if (prompt_mode)
+      std::cout << prompt(*this);
+    bool eof = !std::getline(std::cin, cmd);
+    try {
+      handle(cmd, eof);
+    } catch (ed_error &e) {
+      std::cout << e.what() << std::endl;
+    }
+  }
+}
+} // namespace bed

src/cli/cli.cc

@@ -1,72 +0,0 @@
-#include "cli.h"
-#include "commands/bed/bed.h"
-
-namespace crib::cli {
-static const std::unordered_map<std::string, Command> commands = {
-  {"bed",
-   {crib::commands::bed::run,
-    crib::commands::bed::summary,
-    crib::commands::bed::help}},
-};
-
-bool use_color() {
-  if (std::getenv("NO_COLOR"))
-    return false;
-  if (std::getenv("CLICOLOR_FORCE"))
-    return true;
-  if (!isatty(STDERR_FILENO))
-    return false;
-  const char *term = std::getenv("TERM");
-  if (!term || std::string_view(term) == "dumb" || std::string_view(term) == "xterm")
-    return false;
-  if (const char *clicolor = std::getenv("CLICOLOR"))
-    return std::string_view(clicolor) != "0";
-  return true;
-}
-
-bool use_colors = use_color();
-
-void help() {
-  std::cout << "Usage: crib <command> [options]\n\n"
-            << "Where command is one of\n";
-  for (auto &[name, cmd] : commands)
-    std::cout << "  " << name << " - " << cmd.summary() << "\n";
-}
-
-int execute(const std::string &name, const Command &cmd, int argc, char *argv[]) {
-  try {
-    std::vector<std::string> args(argv, argv + argc);
-    cmd.run(args);
-    return 0;
-  } catch (const cli_error &e) {
-    std::cerr << "Error running " << name << ": " << e.what() << '\n';
-    return e.exit_code;
-  } catch (const std::exception &e) {
-    std::cerr << "Error running " << name << ": " << e.what() << '\n';
-    return 1;
-  } catch (...) {
-    std::cerr << "Unknown error running " << name << '\n';
-    return 1;
-  }
-}
-
-int run(int argc, char *argv[]) {
-  std::string invoked_as = std::filesystem::path(argv[0]).filename();
-
-  if (auto it = commands.find(invoked_as); it != commands.end())
-    return execute(it->first, it->second, argc, argv);
-
-  if (argc > 1)
-    if (auto it = commands.find(argv[1]); it != commands.end())
-      return execute(it->first, it->second, argc - 1, argv + 1);
-
-  if (argc > 1 && std::string(argv[1]) == "--help") {
-    help();
-    return 0;
-  }
-
-  std::cerr << "Invalid command given.\n\n";
-  help();
-  return 2;
-}
-} // namespace crib::cli

src/commands/bed/bed.cc

@@ -1,40 +0,0 @@
-#include "commands/bed/bed.h"
-#include "cli.h"
-
-namespace crib::commands::bed {
-std::string summary() {
-  return "Better Ed, a modern take on a posix compliant line editor.";
-}
-
-void help() {}
-
-void run(std::vector<std::string> args) {
-  std::string prompt = "";
-  std::string file;
-  bool suppress = false;
-  for (size_t i = 1; i < args.size(); i++) {
-    if (args[i] == "-p") {
-      i++;
-      if (i >= args.size())
-        throw crib::cli::cli_error("Prompt not specified!", 1);
-      prompt = args[i];
-    } else if (args[i] == "-s") {
-      suppress = true;
-    } else {
-      if (file.size())
-        throw crib::cli::cli_error("Invalid arguments given.", 1);
-      file = args[i];
-    }
-  }
-  BEd bed(file, suppress, prompt);
-  std::string command;
-  while (true) {
-    std::string cmd;
-    if (bed.prompt_mode)
-      std::cout << bed.prompt;
-    bool eof = !std::getline(std::cin, cmd);
-    if (!bed.handle(cmd, eof))
-      return;
-  }
-}
-} // namespace crib::commands::bed

src/commands/bed/handle.cc

@@ -1,384 +0,0 @@
-#include "commands/bed/bed.h"
-
-namespace crib::commands::bed {
-bool BEd::handle(std::string cmd, bool eof) {
-  using namespace crib::internal::vase;
-  try {
-    if (line > vase.lines())
-      line = vase.lines();
-    Command command = parse(cmd, eof);
-    bool was_quitting = quitting;
-    quitting = false;
-    bool was_editing = editing;
-    editing = false;
-    switch (command.type) {
-    case Command::Type::Quit:
-      if (modified && !was_quitting) {
-        quitting = true;
-        throw bed_error("Buffer modified.");
-      } else {
-        return false;
-      }
-    case Command::Type::ForceQuit:
-      return false;
-    case Command::Type::None: {
-      if (command.start.type != Command::Address::Type::None) {
-        if (command.address_flags & Command::RANGE)
-          resolve_address(command.end, &line);
-        else
-          resolve_address(command.start, &line);
-      } else {
-        line++;
-      }
-      if (line == 0)
-        throw bed_error("Line 0 is invalid.");
-      if (line > vase.lines())
-        throw bed_error("Line position too high.");
-      Iterator it = vase.iterate(line - 1, Direction::Forward);
-      it.next();
-      std::cout << it.line << std::endl;
-    } break;
-    case Command::Type::Invalid:
-      throw bed_error("Invalid command.");
-    case Command::Type::HelpToggle:
-      help_mode = !help_mode;
-      if (help_mode && last_message != "")
-        std::cout << last_message << std::endl;
-      break;
-    case Command::Type::Help:
-      if (last_message != "")
-        std::cout << last_message << std::endl;
-      break;
-    case Command::Type::PromptToggle:
-      prompt_mode = !prompt_mode;
-      break;
-    case Command::Type::Print: {
-      uint64_t line_start = line;
-      uint64_t line_end = line;
-      if (command.start.type != Command::Address::Type::None) {
-        resolve_address(command.start, &line_start);
-        line_end = line_start;
-        if (command.address_flags & Command::RANGE)
-          resolve_address(command.end, &line_end);
-      }
-      if (line_start == 0)
-        throw bed_error("Line 0 is invalid.");
-      if (line_end < line_start)
-        throw bed_error("Invalid address range.");
-      Iterator it = vase.iterate(line_start - 1, Direction::Forward);
-      while (it.next() && line_start++ <= line_end)
-        std::cout << it.line << std::endl;
-      line = line_end;
-    } break;
-    case Command::Type::List: {
-      uint64_t line_start = line;
-      uint64_t line_end = line;
-      if (command.start.type != Command::Address::Type::None) {
-        resolve_address(command.start, &line_start);
-        line_end = line_start;
-        if (command.address_flags & Command::RANGE)
-          resolve_address(command.end, &line_end);
-      }
-      if (line_start == 0)
-        throw bed_error("Line 0 is invalid.");
-      if (line_end < line_start)
-        throw bed_error("Invalid address range.");
-      Iterator it = vase.iterate(line_start - 1, Direction::Forward);
-      while (it.next() && line_start++ <= line_end)
-        std::cout << list_string(it.line) << std::endl;
-      line = line_end;
-    } break;
-    case Command::Type::Number: {
-      uint64_t line_start = line;
-      uint64_t line_end = line;
-      if (command.start.type != Command::Address::Type::None) {
-        resolve_address(command.start, &line_start);
-        line_end = line_start;
-        if (command.address_flags & Command::RANGE)
-          resolve_address(command.end, &line_end);
-      }
-      if (line_start == 0)
-        throw bed_error("Line 0 is invalid.");
-      if (line_end < line_start)
-        throw bed_error("Invalid address range.");
-      Iterator it = vase.iterate(line_start - 1, Direction::Forward);
-      while (it.next() && line_start <= line_end)
-        std::cout << line_start++ << "\t" << it.line << std::endl;
-      line = line_end;
-    } break;
-    case Command::Type::Append: {
-      if (command.start.type != Command::Address::Type::None) {
-        if (command.address_flags & Command::RANGE)
-          resolve_address(command.end, &line);
-        else
-          resolve_address(command.start, &line);
-      }
-      std::string text;
-      std::string cline;
-      uint64_t line_count = 0;
-      while (std::getline(std::cin, cline)) {
-        if (cline == ".")
-          break;
-        line_count++;
-        text.append(cline);
-        text.push_back('\n');
-      }
-      if (text.empty()) {
-        if (line == 0)
-          line = 1;
-        break;
-      }
-      vase.snapshot();
-      append(text, line);
-      modified = true;
-      line += line_count;
-    } break;
-    case Command::Type::Insert: {
-      if (command.start.type != Command::Address::Type::None) {
-        if (command.address_flags & Command::RANGE)
-          resolve_address(command.end, &line);
-        else
-          resolve_address(command.start, &line);
-      }
-      if (line == 0)
-        line = 1;
-      std::string text;
-      std::string cline;
-      uint64_t line_count = 0;
-      while (std::getline(std::cin, cline)) {
-        if (cline == ".")
-          break;
-        line_count++;
-        text.append(cline);
-        text.push_back('\n');
-      }
-      if (text.empty())
-        break;
-      vase.snapshot();
-      append(text, line - 1);
-      modified = true;
-      line += line_count - 1;
-    } break;
-    case Command::Type::Change: {
-      uint64_t line_start = line;
-      uint64_t line_end = line;
-      if (command.start.type != Command::Address::Type::None) {
-        resolve_address(command.start, &line_start);
-        if (line_start == 0)
-          line_start = 1;
-        line_end = line_start;
-        if (command.address_flags & Command::RANGE)
-          resolve_address(command.end, &line_end);
-      }
-      if (line_end < line_start)
-        throw bed_error("Invalid address range.");
-      std::string text;
-      std::string cline;
-      uint64_t line_count = 0;
-      while (std::getline(std::cin, cline)) {
-        if (cline == ".")
-          break;
-        line_count++;
-        text.append(cline);
-        text.push_back('\n');
-      }
-      vase.snapshot();
-      remove(line_start, line_end);
-      line = line_start;
-      if (text.empty())
-        break;
-      append(text, line);
-      modified = true;
-      line += line_count;
-    } break;
-    case Command::Type::Delete: {
-      uint64_t line_start = line;
-      uint64_t line_end = line;
-      if (command.start.type != Command::Address::Type::None) {
-        resolve_address(command.start, &line_start);
-        if (line_start == 0)
-          line_start = 1;
-        line_end = line_start;
-        if (command.address_flags & Command::RANGE)
-          resolve_address(command.end, &line_end);
-      }
-      if (line_end < line_start)
-        throw bed_error("Invalid address range.");
-      vase.snapshot();
-      vase.erase({{line_start - 1, 0}, {line_end, 0}});
-      modified = true;
-      line = line_start;
-      if (line > vase.lines())
-        line = vase.lines();
-    } break;
-    case Command::Type::Write: {
-      std::string path = command.argument;
-      if (path.empty()) {
-        path = save_path;
-        if (path.empty())
-          throw bed_error("Need file to write to.");
-      }
-      uint64_t line_start = 1;
-      uint64_t line_end = vase.lines();
-      if (vase.lines() == 0)
-        line_start = line_end = 0;
-      if (command.start.type != Command::Address::Type::None) {
-        resolve_address(command.start, &line_start);
-        line_end = line_start;
-        if (command.address_flags & Command::RANGE)
-          resolve_address(command.end, &line_end);
-      }
-      if (vase.lines() && line_start == 0)
-        throw bed_error("Line 0 is invalid.");
-      if (line_end < line_start)
-        throw bed_error("Invalid address range.");
-      uint64_t bytes = 0;
-      if (path[0] == '!') {
-        FILE *pipe = popen(path.c_str() + 1, "w");
-        if (!pipe)
-          throw bed_error("Error starting command.");
-        Iterator it = vase.iterate(line_start - 1, Direction::Forward);
-        while (it.next() && line_start++ <= line_end) {
-          it.line += '\n';
-          bytes += it.line.size();
-          if (fputs(it.line.c_str(), pipe) == EOF) {
-            pclose(pipe);
-            throw bed_error("Error writing to command.");
-          }
-        }
-        if (pclose(pipe) == -1)
-          throw bed_error("Error closing command.");
-      } else {
-        std::ofstream file(path, std::ios::out | std::ios::trunc);
-        if (!file)
-          throw bed_error("Error writing to file.");
-        Iterator it = vase.iterate(line_start - 1, Direction::Forward);
-        while (it.next() && line_start++ <= line_end) {
-          file << it.line << '\n';
-          bytes += it.line.size() + 1;
-        }
-        if (!file)
-          throw bed_error("Error writing to file.");
-        save_path = path;
-        modified = false;
-      }
-      if (!suppress_mode)
-        std::cout << bytes << std::endl;
-    } break;
-    case Command::Type::Join: {
-      uint64_t line_start = line;
-      uint64_t line_end = line + 1;
-      if (command.start.type != Command::Address::Type::None) {
-        resolve_address(command.start, &line_start);
-        line_end = line_start;
-        if (command.address_flags & Command::RANGE)
-          resolve_address(command.end, &line_end);
-      }
-      if (line_end < line_start)
-        throw bed_error("Invalid address range.");
-      if (line_start == 0)
-        throw bed_error("Invalid line number given.");
-      if (line_end == line_start)
-        break;
-      vase.snapshot();
-      join(line_start, line_end);
-      line = line_start;
-      modified = true;
-    } break;
-    case Command::Type::Mark: {
-      uint64_t mark_line = line;
-      if (command.start.type != Command::Address::Type::None) {
-        if (command.address_flags & Command::RANGE)
-          resolve_address(command.end, &mark_line);
-        else
-          resolve_address(command.start, &mark_line);
-      }
-      if (mark_line == 0)
-        throw bed_error("Invalid line number given.");
-      char mark = command.argument[0];
-      marks[mark - 'a'] = mark_line;
-    } break;
-    case Command::Type::Edit: {
-      if (modified && !was_editing) {
-        editing = true;
-        throw bed_error("Buffer modified.");
-      }
-      std::string path = command.argument;
-      if (path.empty()) {
-        path = save_path;
-        if (path.empty())
-          throw bed_error("Need file to read from.");
-      }
-      if (path[0] == '!') {
-        path.erase(1);
-        Vase new_vase(std::string(path), "/tmp");
-        vase = std::move(new_vase);
-        modified = true;
-      } else {
-        Vase new_vase(std::filesystem::path(path), "/tmp");
-        vase = std::move(new_vase);
-        save_path = path;
-        modified = false;
-      }
-      line = vase.lines();
-      if (!suppress_mode)
-        std::cout << vase.length() << std::endl;
-    } break;
-    case Command::Type::ForceEdit: {
-      std::string path = command.argument;
-      if (path.empty()) {
-        path = save_path;
-        if (path.empty())
-          throw bed_error("Need file to read from.");
-      }
-      if (path[0] == '!') {
-        path.erase(0, 1);
-        Vase new_vase(std::string(path), "/tmp");
-        vase = std::move(new_vase);
-        modified = true;
-      } else {
-        Vase new_vase(std::filesystem::path(path), "/tmp");
-        vase = std::move(new_vase);
-        save_path = path;
-        modified = false;
-      }
-      line = vase.lines();
-      std::fill(std::begin(marks), std::end(marks), '\0');
-      if (!suppress_mode)
-        std::cout << vase.length() << std::endl;
-    } break;
-    case Command::Type::Filename: {
-      std::string path = command.argument;
-      if (path.empty())
-        throw bed_error("No filename given.");
-      save_path = path;
-      std::cout << save_path.string() << std::endl;
-    } break;
-    case Command::Type::Dump:
-      Shard::dump(vase.root);
-      break;
-    }
-    if (command.suffix) {
-      Iterator it = vase.iterate(line - 1, Direction::Forward);
-      it.next();
-      switch (command.suffix) {
-      case 'p':
-        std::cout << it.line << std::endl;
-        break;
-      case 'n':
-        std::cout << line << "\t" << it.line << std::endl;
-        break;
-      case 'l':
-        std::cout << list_string(it.line) << std::endl;
-        break;
-      }
-    }
-  } catch (bed_error &e) {
-    last_message = e.what();
-    std::cout << "?" << std::endl;
-    if (help_mode)
-      std::cout << e.what() << std::endl;
-  }
-  return true;
-}
-} // namespace crib::commands::bed

src/commands/bed/helpers.cc

@@ -1,83 +0,0 @@
-#include "commands/bed/bed.h"
-
-namespace crib::commands::bed {
-void BEd::append(std::string text, uint64_t line) {
-  using namespace crib::internal::vase;
-  Point p = {line, 0};
-  if (!vase.lines()) {
-    text.pop_back();
-  } else if (line == vase.lines()) {
-    p.row--;
-    p.col = UINT64_MAX;
-    text = "\n" + text;
-    text.pop_back();
-  }
-  vase.insert(&p, text);
-}
-
-void BEd::remove(uint64_t start_line, uint64_t end_line) {
-  vase.erase({{start_line - 1, 0}, {end_line, 0}});
-}
-
-void BEd::join(uint64_t start_line, uint64_t end_line) {
-  vase.regex_search_replace("\\n", {{start_line - 1, 0}, {end_line, 0}}, "", "");
-}
-
-std::string BEd::list_string(std::string_view s) {
-  uint32_t width = 80;
-  winsize ws{};
-  if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0 && ws.ws_col != 0)
-    width = ws.ws_col;
-  std::string out;
-  out.reserve(s.size());
-  const uint32_t max_width = width > 1 ? width - 1 : 1;
-  uint32_t column = 0;
-  auto append = [&](std::string_view text) {
-    if (column + text.size() > max_width) {
-      out += "\\\n";
-      column = 0;
-    }
-    out += text;
-    column += text.size();
-  };
-  for (unsigned char c : s) {
-    switch (c) {
-    case '\\':
-      append("\\\\");
-      break;
-    case '$':
-      append("\\$");
-      break;
-    case '\a':
-      append("\\a");
-      break;
-    case '\b':
-      append("\\b");
-      break;
-    case '\f':
-      append("\\f");
-      break;
-    case '\r':
-      append("\\r");
-      break;
-    case '\t':
-      append("\\t");
-      break;
-    case '\v':
-      append("\\v");
-      break;
-    default:
-      if (!std::isprint(c)) {
-        char buf[5];
-        std::snprintf(buf, sizeof(buf), "\\%03o", c);
-        append(buf);
-      } else {
-        append(std::string_view((const char *)&c, 1));
-      }
-      break;
-    }
-  }
-  out += '$';
-  return out;
-}
-} // namespace crib::commands::bed

src/commands/bed/parsers/command.cc

@@ -1,176 +0,0 @@
-#include "commands/bed/bed.h"
-
-namespace crib::commands::bed {
-Command BEd::parse(std::string cmd, bool eof) {
-  Command command = {};
-  if (eof)
-    return (command.type = Command::Type::Quit, command);
-  uint64_t i = 0;
-  auto skip_space = [&] {
-    while (i < cmd.size() && (cmd[i] == ' ' || cmd[i] == '\t'))
-      ++i;
-  };
-  Command::Address first;
-  Command::Address second;
-  parse_address(cmd, i, first);
-  bool have_range = false;
-  while (i < cmd.size() && (cmd[i] == ',' || cmd[i] == ';')) {
-    char sep = cmd[i++];
-    if (sep == ';')
-      resolve_address(first, &line);
-    command.address_flags = sep == ';' ? Command::SEMICOLON : 0;
-    if (have_range)
-      first = second;
-    parse_address(cmd, i, second);
-    have_range = true;
-  }
-  if (have_range) {
-    if (first.type != Command::Address::Type::None
-        && second.type == Command::Address::Type::None) {
-      second = first;
-    } else if (first.type == Command::Address::Type::None) {
-      if (command.address_flags & Command::SEMICOLON) {
-        first.type = Command::Address::Type::Current;
-      } else {
-        first.type = Command::Address::Type::Number;
-        first.number = 1;
-      }
-      if (second.type == Command::Address::Type::None)
-        second.type = Command::Address::Type::Last;
-    }
-    command.address_flags |= Command::RANGE;
-    command.start = first;
-    command.end = second;
-  } else {
-    command.start = first;
-  }
-  if (i >= cmd.size()) {
-    command.type = Command::Type::None;
-    return command;
-  }
-  switch (cmd[i]) {
-  case 'q':
-    command.type = Command::Type::Quit;
-    skip_space();
-    if (i >= cmd.size())
-      return command;
-    throw bed_error("Invalid command.");
-  case 'Q':
-    command.type = Command::Type::ForceQuit;
-    skip_space();
-    if (i >= cmd.size())
-      return command;
-    throw bed_error("Invalid command.");
-  case 'p':
-    command.type = Command::Type::Print;
-    i++;
-    break;
-  case 'l':
-    command.type = Command::Type::List;
-    i++;
-    break;
-  case 'n':
-    command.type = Command::Type::Number;
-    i++;
-    break;
-  case 'P':
-    command.type = Command::Type::PromptToggle;
-    i++;
-    break;
-  case 'H':
-    command.type = Command::Type::HelpToggle;
-    i++;
-    break;
-  case 'h':
-    command.type = Command::Type::Help;
-    i++;
-    break;
-  case 'a':
-    command.type = Command::Type::Append;
-    i++;
-    break;
-  case 'i':
-    command.type = Command::Type::Insert;
-    i++;
-    break;
-  case 'c':
-    command.type = Command::Type::Change;
-    i++;
-    break;
-  case 'd':
-    command.type = Command::Type::Delete;
-    i++;
-    break;
-  case 'j':
-    command.type = Command::Type::Join;
-    i++;
-    break;
-  case 'w':
-    command.type = Command::Type::Write;
-    i++;
-    if (i >= cmd.size())
-      return command;
-    if (cmd[i] == ' ' || cmd[i] == '\t')
-      skip_space();
-    else
-      throw bed_error("Invalid command.");
-    command.argument = cmd.substr(i);
-    return command;
-  case 'e':
-    command.type = Command::Type::Edit;
-    i++;
-    if (i >= cmd.size())
-      return command;
-    if (cmd[i] == ' ' || cmd[i] == '\t')
-      skip_space();
-    else
-      throw bed_error("Invalid command.");
-    command.argument = cmd.substr(i);
-    return command;
-  case 'E':
-    command.type = Command::Type::ForceEdit;
-    i++;
-    if (i >= cmd.size())
-      return command;
-    if (cmd[i] == ' ' || cmd[i] == '\t')
-      skip_space();
-    else
-      throw bed_error("Invalid command.");
-    command.argument = cmd.substr(i);
-    return command;
-  case 'f':
-    command.type = Command::Type::Filename;
-    i++;
-    if (i >= cmd.size())
-      return command;
-    if (cmd[i] == ' ' || cmd[i] == '\t')
-      skip_space();
-    else
-      throw bed_error("Invalid command.");
-    command.argument = cmd.substr(i);
-    return command;
-  case 'k':
-    command.type = Command::Type::Mark;
-    i++;
-    if (i >= cmd.size())
-      throw bed_error("Invalid command.");
-    if ('a' <= cmd[i] && cmd[i] <= 'z')
-      command.argument = cmd[i];
-    else
-      throw bed_error("Invalid mark used.");
-    break;
-  case '#':
-    command.type = Command::Type::Dump;
-    i++;
-    break;
-  }
-  if (i < cmd.size()) {
-    if (cmd[i] == 'l' || cmd[i] == 'n' || cmd[i] == 'p')
-      command.suffix = cmd[i++];
-    skip_space();
-    if (i != cmd.size())
-      throw bed_error("Invalid command.");
-  }
-  return command;
-}
-} // namespace crib::commands::bed

src/internal/address/address.cc

@@ -1,36 +1,33 @@
-#include "commands/bed/bed.h"
+#include "internal/address/address.h"
 
-namespace crib::commands::bed {
-void BEd::parse_address(std::string_view cmd, uint64_t &i, Command::Address &addr) {
+namespace bed::internal::address {
+Address::Address(std::string &cmd, uint64_t &i) {
+  base = None{};
   auto skip_space = [&] {
     while (i < cmd.size() && (cmd[i] == ' ' || cmd[i] == '\t'))
       ++i;
   };
   skip_space();
-  if (i >= cmd.size()) {
-    addr.type = Command::Address::Type::None;
+  if (i >= cmd.size())
     return;
-  }
   switch (cmd[i]) {
   case '.':
-    addr.type = Command::Address::Type::Current;
+    base = Current();
     i++;
     break;
   case '$':
-    addr.type = Command::Address::Type::Last;
+    base = Last();
     i++;
     break;
-  case '\'':
-    addr.type = Command::Address::Type::Mark;
+  case '\'': {
     i++;
     if (i < cmd.size() && 'a' <= cmd[i] && cmd[i] <= 'z')
       i++;
     else
-      throw bed_error("Invalid mark.");
-    addr.mark = cmd[i];
-    break;
+      throw address_error("Invalid mark.");
+    base = Mark(cmd[i]);
+  } break;
   case '/': {
-    addr.type = Command::Address::Type::SearchForward;
     i++;
     uint64_t start = i;
     while (true) {
@@ -49,10 +46,9 @@ void BEd::parse_address(std::string_view cmd, uint64_t &i, Command::Address &add
       else
         i++;
     }
-    addr.regex = cmd.substr(start, i - start);
+    base = RegexLine(Direction::Forward, cmd.substr(start, i - start));
   } break;
   case '?': {
-    addr.type = Command::Address::Type::SearchBackward;
     i++;
     uint64_t start = i;
     while (true) {
@@ -71,9 +67,10 @@ void BEd::parse_address(std::string_view cmd, uint64_t &i, Command::Address &add
       else
         i++;
     }
-    addr.regex = cmd.substr(start, i - start);
+    base = RegexLine(Direction::Backward, cmd.substr(start, i - start));
   } break;
   case '+': {
+    base = Current();
     i++;
     skip_space();
     uint64_t start = i;
@@ -84,9 +81,10 @@ void BEd::parse_address(std::string_view cmd, uint64_t &i, Command::Address &add
     }
     if (start == i)
       num = 1;
-    addr.offset += num;
+    offset += num;
   } break;
   case '-': {
+    base = Current();
     i++;
     skip_space();
     uint64_t start = i;
@@ -97,19 +95,17 @@ void BEd::parse_address(std::string_view cmd, uint64_t &i, Command::Address &add
     }
     if (start == i)
       num = 1;
-    addr.offset -= num;
+    offset -= num;
   } break;
   default: {
     if ('0' <= cmd[i] && cmd[i] <= '9') {
-      int64_t num = 0;
-      addr.type = Command::Address::Type::Number;
+      uint64_t num = 0;
       while (i < cmd.size() && '0' <= cmd[i] && cmd[i] <= '9') {
         num = num * 10 + (cmd[i] - '0');
         i++;
       }
-      addr.number = num;
+      base = Number(num);
     } else {
-      addr.type = Command::Address::Type::None;
       return;
     }
     break;
@@ -130,49 +126,8 @@ void BEd::parse_address(std::string_view cmd, uint64_t &i, Command::Address &add
     }
     if (start == i)
       num = 1;
-    addr.offset += positive ? num : -num;
+    offset += positive ? num : -num;
     skip_space();
   }
 }
-
-void BEd::resolve_address(Command::Address addr, uint64_t *out_line) {
-  switch (addr.type) {
-  case Command::Address::Type::None:
-    break;
-  case Command::Address::Type::Current:
-    *out_line = line;
-    if (*out_line > vase.lines())
-      *out_line = vase.lines();
-    break;
-  case Command::Address::Type::Number:
-    *out_line = addr.number;
-    break;
-  case Command::Address::Type::Last:
-    *out_line = vase.lines();
-    break;
-  case Command::Address::Type::Mark:
-    *out_line = marks[addr.mark - 'a'];
-    if (!*out_line)
-      throw bed_error("Unset mark used.");
-    break;
-  case Command::Address::Type::SearchForward:
-    if (addr.regex == "")
-      addr.regex = last_regex;
-    last_regex = addr.regex;
-    // TODO: use vase.regex_search(regex, range, options);
-    break;
-  case Command::Address::Type::SearchBackward:
-    if (addr.regex == "")
-      addr.regex = last_regex;
-    last_regex = addr.regex;
-    // TODO
-    break;
-  }
-  if ((int64_t)*out_line + addr.offset < 0)
-    throw bed_error("Line position can't be negative.");
-  else
-    *out_line += addr.offset;
-  if (*out_line > vase.lines())
-    throw bed_error("Line position too high.");
-}
-} // namespace crib::commands::bed
+} // namespace bed::internal::address

src/internal/address/handle.cc

@@ -0,0 +1,54 @@
+#include "bed.h"
+#include "internal/address/address.h"
+
+namespace bed::internal::address {
+Address::Result Address::handle(BEd &ctx, std::string &cmd, uint64_t &i) {
+  bool prev_given = false;
+  Address prev;
+  Address curr;
+  while (i < cmd.size()) {
+    if (cmd[i] == '%') {
+      prev_given = true;
+      prev.base = Number(ctx.active->prev_range.start);
+      prev.offset = 0;
+      curr.base = Number(ctx.active->prev_range.end);
+      curr.offset = 0;
+      i++;
+    } else {
+      curr = Address(cmd, i);
+    }
+    if (i < cmd.size() && (cmd[i] == ',' || cmd[i] == ';')) {
+      if (std::holds_alternative<None>(curr.base)) {
+        if (cmd[i] == ',')
+          curr.base = Number(1);
+        else
+          curr.base = Current();
+        curr.offset = 0;
+        prev_given = false;
+      } else {
+        if (cmd[i] == ';')
+          ctx.active->jump(curr.resolve(ctx));
+        prev_given = true;
+      }
+      i++;
+      prev = std::move(curr);
+    } else {
+      if (std::holds_alternative<None>(curr.base)) {
+        if (std::holds_alternative<std::monostate>(prev.base))
+          return {{}, 0};
+        if (prev_given) {
+          curr = prev;
+        } else {
+          curr.base = Last();
+          curr.offset = 0;
+        }
+        return {{prev.resolve(ctx), curr.resolve(ctx)}, 2};
+      }
+      if (prev_given)
+        return {{prev.resolve(ctx), curr.resolve(ctx)}, 2};
+      return {{curr.resolve(ctx)}, 1};
+    }
+  }
+  return {};
+}
+}; // namespace bed::internal::address

src/internal/address/resolve.cc

@@ -0,0 +1,40 @@
+#include "bed.h"
+#include "internal/address/address.h"
+
+namespace bed::internal::address {
+uint64_t Address::resolve(BEd &ctx) {
+  uint64_t result = std::visit(
+    [&](auto const &addr) -> uint64_t {
+      uint64_t line = 0;
+
+      using T = std::decay_t<decltype(addr)>;
+
+      if constexpr (std::is_same_v<T, std::monostate>) {
+        throw address_error("empty address");
+      } else if constexpr (std::is_same_v<T, None>) {
+        throw address_error("no address");
+      } else if constexpr (std::is_same_v<T, Current>) {
+        line = ctx.active->line;
+      } else if constexpr (std::is_same_v<T, Last>) {
+        line = ctx.active->vase.lines();
+      } else if constexpr (std::is_same_v<T, Number>) {
+        line = addr.i;
+      } else {
+        throw ed_error("Unhandled address given.");
+      }
+
+      if (offset < 0 && line < (uint64_t)-offset)
+        throw address_error("Can't have negative addresses");
+      line += offset;
+
+      if (line > ctx.active->vase.lines())
+        throw address_error("Line number too high.");
+
+      return line;
+    },
+    base
+  );
+
+  return result + offset;
+}
+}; // namespace bed::internal::address

src/internal/buffer/buffer.cc

@@ -0,0 +1,161 @@
+#include "internal/buffer/buffer.h"
+
+namespace bed::internal::buffer {
+Buffer::Buffer() : vase("/tmp") {
+  line = vase.lines();
+  modified = false;
+}
+
+Buffer::Buffer(std::string command) : vase(command, "/tmp") {
+  line = vase.lines();
+  if (!line)
+    return;
+  prev_range.start = 1;
+  prev_range.end = line;
+  modified = false;
+}
+
+Buffer::Buffer(std::filesystem::path path) : vase(path, "/tmp") {
+  line = vase.lines();
+  if (!line)
+    return;
+  prev_range.start = 1;
+  prev_range.end = line;
+  save_path = path;
+  modified = false;
+}
+
+void Buffer::load(std::string command) {
+  vase::Vase new_vase = vase::Vase(command, "/tmp");
+  vase = std::move(new_vase);
+  line = vase.lines();
+  if (!line) {
+    prev_range.start = 0;
+    prev_range.end = 0;
+  } else {
+    prev_range.start = 1;
+    prev_range.end = line;
+  }
+  modified = false;
+}
+
+void Buffer::load(std::filesystem::path path) {
+  vase::Vase new_vase = vase::Vase(path, "/tmp");
+  vase = std::move(new_vase);
+  line = vase.lines();
+  if (!line) {
+    prev_range.start = 0;
+    prev_range.end = 0;
+  } else {
+    prev_range.start = 1;
+    prev_range.end = line;
+  }
+  save_path = path;
+  modified = false;
+}
+
+void Buffer::jump(uint64_t n_line) {
+  if (n_line > vase.lines())
+    throw ed_error("Line number too high.");
+  line = n_line;
+  prev_range.start = line;
+  prev_range.end = line;
+}
+
+void Buffer::append(std::string text, uint64_t line) {
+  using namespace bed::internal::vase;
+  Point p = {line, 0};
+  if (!vase.lines()) {
+    text.pop_back();
+  } else if (line == vase.lines()) {
+    p.row--;
+    p.col = UINT64_MAX;
+    text = "\n" + text;
+    text.pop_back();
+  }
+  prev_range.start = p.row + 1;
+  vase.insert(&p, text);
+  prev_range.end = p.row + 1;
+  modified = true;
+}
+
+void Buffer::remove(uint64_t start_line, uint64_t end_line) {
+  vase.erase({{start_line - 1, 0}, {end_line, 0}});
+  prev_range.start = start_line;
+  prev_range.end = start_line;
+  modified = true;
+}
+
+void Buffer::join(uint64_t start_line, uint64_t end_line) {
+  vase.regex_search_replace(R"(\n)", {{start_line - 1, 0}, {end_line, 0}}, "", "g");
+  prev_range.start = start_line;
+  prev_range.end = start_line;
+  modified = true;
+}
+
+void Buffer::print(uint64_t start_line, uint64_t end_line) {
+  vase::Iterator it = vase.iterate(start_line - 1, Direction::Forward);
+  while (it.next() && start_line++ <= end_line)
+    std::cout << it.line << std::endl;
+  prev_range.start = start_line;
+  prev_range.end = end_line;
+}
+
+std::string Buffer::list_string(std::string_view s) {
+  uint32_t width = 80;
+  winsize ws{};
+  if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0 && ws.ws_col != 0)
+    width = ws.ws_col;
+  std::string out;
+  out.reserve(s.size());
+  const uint32_t max_width = width > 1 ? width - 1 : 1;
+  uint32_t column = 0;
+  auto append = [&](std::string_view text) {
+    if (column + text.size() > max_width) {
+      out += "\\\n";
+      column = 0;
+    }
+    out += text;
+    column += text.size();
+  };
+  for (unsigned char c : s) {
+    switch (c) {
+    case '\\':
+      append("\\\\");
+      break;
+    case '$':
+      append("\\$");
+      break;
+    case '\a':
+      append("\\a");
+      break;
+    case '\b':
+      append("\\b");
+      break;
+    case '\f':
+      append("\\f");
+      break;
+    case '\r':
+      append("\\r");
+      break;
+    case '\t':
+      append("\\t");
+      break;
+    case '\v':
+      append("\\v");
+      break;
+    default:
+      if (!std::isprint(c)) {
+        char buf[5];
+        std::snprintf(buf, sizeof(buf), "\\%03o", c);
+        append(buf);
+      } else {
+        append(std::string_view((const char *)&c, 1));
+      }
+      break;
+    }
+  }
+  out += '$';
+  return out;
+}
+} // namespace bed::internal::buffer

src/internal/commands/commands.cc

@@ -0,0 +1,135 @@
+#include "internal/commands/commands.h"
+#include "bed.h"
+#include "internal/commands/suffixes.h"
+
+namespace bed::internal::commands {
+void Suffix::register_suffixes(BEd &ctx) {
+  ctx.suffixes['p' - 'a'] = Suffix{
+    .desc = "Prints current line.",
+    .handle = [](BEd &ctx) {
+      auto line = ctx.active->line;
+      ctx.active->print(line, line);
+    }
+  };
+}
+
+void Command::register_posix(BEd &ctx) {
+  ctx.no_op = Command{
+    .address_mode = Command::AddressMode::Single,
+    .suffix = Command::SuffixKind::None,
+    .desc = "Prints a line and jumps to it (default: .+1)",
+    .accept_zero = false,
+    .handle = [](BEd &ctx, std::span<const uint64_t> addresses, std::string_view) {
+      uint64_t line;
+      if (addresses.size())
+        line = addresses[0];
+      else
+        line = ctx.active->line + 1;
+      if (line == 0)
+        throw ed_error("Line 0 is invalid.");
+      ctx.active->jump(line);
+      ctx.active->print(line, line);
+    }
+  };
+  ctx.eof_op = Command{
+    .address_mode = Command::AddressMode::None,
+    .suffix = Command::SuffixKind::None,
+    .desc = "Try quitting.",
+    .accept_zero = false,
+    .handle = [](BEd &ctx, std::span<const uint64_t>, std::string_view) {
+      for (auto &[name, buffer] : ctx.buffers)
+        if (buffer->modified)
+          throw ed_error("Buffer " + name + " modified.");
+      throw fatal_error("Quitting", 0);
+    }
+  };
+  ctx.commands.insert(
+    "a",
+    Command{
+      .address_mode = Command::AddressMode::Single,
+      .suffix = Command::SuffixKind::Suffix,
+      .desc = "Append lines at address (default: .)",
+      .accept_zero = true,
+      .handle = [](BEd &, std::span<const uint64_t>, std::string_view) {
+        // TODO: start a text editing session, then append its stuff.
+      }
+    }
+  );
+  ctx.commands.insert(
+    "q",
+    Command{
+      .address_mode = Command::AddressMode::None,
+      .suffix = Command::SuffixKind::None,
+      .desc = "Try quitting.",
+      .accept_zero = false,
+      .handle = [](BEd &ctx, std::span<const uint64_t>, std::string_view) {
+        for (auto &[name, buffer] : ctx.buffers)
+          if (buffer->modified)
+            throw ed_error("Buffer " + name + " modified.");
+        throw fatal_error("Quitting", 0);
+      }
+    }
+  );
+  ctx.commands.insert(
+    "Q",
+    Command{
+      .address_mode = Command::AddressMode::None,
+      .suffix = Command::SuffixKind::None,
+      .desc = "Force quitting.",
+      .accept_zero = false,
+      .handle = [](BEd &, std::span<const uint64_t>, std::string_view) {
+        throw fatal_error("Force Quitting", 0);
+      }
+    }
+  );
+  ctx.commands.insert(
+    "p",
+    Command{
+      .address_mode = Command::AddressMode::Range,
+      .suffix = Command::SuffixKind::Suffix,
+      .desc = "Print range (default .,.)",
+      .accept_zero = false,
+      .handle = [](BEd &ctx, std::span<const uint64_t> addresses, std::string_view) {
+        uint64_t start_line = ctx.active->line;
+        uint64_t end_line = ctx.active->line;
+        if (!addresses.size())
+          ctx.active->print(start_line, end_line);
+        else if (addresses.size() == 1)
+          ctx.active->print(addresses[0], addresses[0]);
+        else
+          ctx.active->print(addresses[0], addresses[1]);
+      }
+    }
+  );
+  ctx.commands.insert(
+    "E",
+    Command{
+      .address_mode = Command::AddressMode::None,
+      .suffix = Command::SuffixKind::Argument,
+      .desc = "Load a file into the current buffer.",
+      .accept_zero = true,
+      .handle = [](BEd &ctx, std::span<const uint64_t>, std::string_view file) {
+        bool empty = false;
+        if (file.empty())
+          empty = true;
+        uint64_t i = 0;
+        while (i < file.length() && (file[i] == ' ' || file[i] == '\t'))
+          i++;
+        if (i >= file.size())
+          empty = true;
+        if (empty) {
+          if (ctx.active->save_path == "")
+            throw ed_error("Need filename!");
+          ctx.active->load(ctx.active->save_path);
+        } else if (file[i] == '!') {
+          file = file.substr(1);
+          ctx.active->load(file);
+        } else {
+          ctx.active->load(std::filesystem::path(file));
+        }
+        std::cout << ctx.active->vase.length() << std::endl;
+      }
+    }
+  );
+}
+} // namespace bed::internal::commands

src/internal/vase/buffer/append.cc

@@ -1,6 +1,6 @@
 #include "internal/vase/vase.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 AppendBuffer::AppendBuffer(std::filesystem::path base_dir) {
   base_dir /= "tapp.XXXXXX";
   char *s = strdup(base_dir.c_str());
@@ -69,4 +69,4 @@ const char *AppendBuffer::read(uint64_t pos) {
 uint64_t AppendBuffer::length() {
   return current_size;
 }
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

src/internal/vase/buffer/original.cc

@@ -1,6 +1,6 @@
 #include "internal/vase/vase.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 OriginalBuffer::OriginalBuffer(std::filesystem::path base_dir) {
   if (!std::filesystem::exists(base_dir) || !std::filesystem::is_directory(base_dir))
     throw std::runtime_error("Swap directory does not exist or is not a directory.");
@@ -44,4 +44,4 @@ const char *OriginalBuffer::read(uint64_t pos) {
 uint64_t OriginalBuffer::length() {
   return len;
 }
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

src/internal/vase/iterators/line.cc

@@ -1,6 +1,6 @@
 #include "internal/vase/vase.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 LineIterator::LineIterator(Shard *root, uint64_t line_num, Direction dir)
     : it(root, dir), dir(dir) {
   it.seek_line(line_num);
@@ -72,4 +72,4 @@ bool LineIterator::next(std::string *line) {
 uint64_t LineIterator::byte_offset() {
   return last_line_offset;
 }
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

src/internal/vase/iterators/petal.cc

@@ -1,6 +1,6 @@
 #include "internal/vase/vase.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 PetalIterator::PetalIterator(Shard *r, Direction dir)
     : dir(dir), root(r) {
   if (!root)
@@ -168,4 +168,4 @@ bool PetalIterator::next(const char **data, uint64_t *out_len) {
 uint64_t PetalIterator::byte_offset() {
   return last_offset;
 }
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

src/internal/vase/regex/api.cc

@@ -1,6 +1,6 @@
 #include "internal/vase/vase.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 std::vector<Vase::ReplacePart> Vase::parse_replace(std::string_view s) {
   std::vector<ReplacePart> parts;
   std::string constant;
@@ -156,4 +156,4 @@ std::vector<Range> Vase::regex_search(
     result.push_back({point_of(match.start), point_of(match.end)});
   return result;
 }
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

src/internal/vase/regex/core.cc

@@ -1,6 +1,6 @@
 #include "internal/vase/vase.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 std::vector<Vase::RegexMatch> Vase::_regex_search(
   std::string_view pattern, Range range, std::string_view options
 ) {
@@ -244,4 +244,4 @@ std::vector<Vase::RegexMatch> Vase::_regex_search(
 
   return results;
 }
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

src/internal/vase/shard.cc

@@ -1,6 +1,6 @@
 #include "internal/vase/vase.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 void Shard::retain(Shard *n) {
   if (n)
     n->refs++;
@@ -424,4 +424,4 @@ void Shard::dump(Shard *node, int depth) {
       << "\"\n";
   }
 }
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

src/internal/vase/vase.cc

@@ -1,6 +1,6 @@
 #include "internal/vase/vase.h"
 
-namespace crib::internal::vase {
+namespace bed::internal::vase {
 Vase::Vase(std::filesystem::path path, std::filesystem::path swapdir)
     : path(path), swapdir(swapdir) {
   if (!std::filesystem::exists(swapdir) || !std::filesystem::is_directory(swapdir))
@@ -507,4 +507,4 @@ void Vase::move_lines(Point *point, uint64_t amount, Direction dir) {
   }
   clamp(point);
 }
-} // namespace crib::internal::vase
+} // namespace bed::internal::vase

src/main.cc

@@ -1,6 +1,18 @@
-#include "cli.h"
+#include "bed.h"
 #include "pch.h"
 
 int main(int argc, char *argv[]) {
-  return crib::cli::run(argc, argv);
+  std::vector<std::string> args(argv, argv + argc);
+  try {
+    bed::BEd ed(args);
+    ed.run();
+  } catch (bed::fatal_error &e) {
+    if (e.code)
+      std::cout << "Fatal error: " << e.what() << std::endl;
+    return e.code;
+  } catch (...) {
+    std::cout << "Unexpected error." << std::endl;
+    return 1;
+  }
+  return 0;
 }