Reqrite project as BEd specific.

src/internal/commands/commands.cc

@@ -0,0 +1,104 @@
+#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("", 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("", 0);
+      }
+    }
+  );
+  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