Add basic c syntax highlighting.

include/internal/syntax/c/parser.h

@@ -0,0 +1,65 @@
+#pragma once
+
+#include "decl.h"
+#include "pch.h"
+
+namespace bed::internal::syntax::c {
+struct CParser {
+  void **v_state;
+  CState *state;
+  std::string_view line;
+  bool still_empty = true;
+  uint32_t i = 0;
+
+  CParser(void **v_state, std::string_view line)
+      : v_state(v_state), state((CState *)*v_state), line(line) {}
+
+  uint32_t len() const {
+    return line.size();
+  }
+
+  CState::CInternalState &current() {
+    return state->stack()[state->top - 1];
+  }
+
+  char peek(int32_t offset = 0) {
+    uint32_t pos = i + offset;
+    return pos < line.size() ? line[pos] : '\0';
+  }
+
+  std::string_view peek_str(uint32_t len) {
+    return line.substr(i, len);
+  }
+
+  void advance() {
+    ++i;
+  }
+
+  void advance(uint32_t n) {
+    i += n;
+  }
+
+  void push_state() {
+    state->top++;
+    state = (CState *)realloc(
+      state,
+      sizeof(CState)
+        + sizeof(CState::CInternalState) * state->top
+    );
+    current() = {
+      .brace_level = 1,
+      .state = CState::CInternalState::NONE,
+      .flags = 0
+    };
+  }
+
+  void pop_state() {
+    state->top--;
+  }
+};
+
+void c_parse(
+  void **v_state, std::string_view line, bool first_line,
+  std::vector<io::Token> *tokens, std::vector<ParseEvent> *events
+);
+} // namespace bed::internal::syntax::c