158 lines
4.8 KiB
C
158 lines
4.8 KiB
C
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#ifndef DQN_HEADER_H
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#define DQN_HEADER_H
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#define DQN_HEADER_COPY_PROTOTYPE(func_return, func_name_and_types) func_return func_name_and_types
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#endif /* DQN_HEADER_H */
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#ifdef DQN_HEADER_IMPLEMENTATION
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#define _CRT_SECURE_NO_WARNINGS // NOTE: Undefined at end of file
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#include <stddef.h>
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#define DQN_IMPLEMENTATION
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#include "Dqn.h"
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char const *Dqn_Header__ParseFunctionReturnType(char const *ptr, isize *len)
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{
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char const *result = Dqn_StrSkipWhitespace(ptr);
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isize result_len = 0;
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for (int scope = 0; ptr; ptr++) // NOTE: Parse the function return type
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{
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if (ptr[0] == '<' || ptr[0] == '>')
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{
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if (ptr[0] == '<') scope++;
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else scope--;
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continue;
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}
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else if (ptr[0] == ',')
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{
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if (scope != 0) continue;
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result_len = static_cast<int>(ptr - result);
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break;
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}
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}
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if (len) *len = result_len;
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return result;
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}
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char const *Dqn_Header__ParseFunctionNameAndParameters(char const *ptr, isize *len)
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{
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char const *result = ptr;
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int result_len = 0;
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for (int scope = 0; ptr; ptr++) // NOTE: Parse the function name and parameters
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{
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if (ptr[0] == '(') scope++;
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else if (ptr[0] == ')')
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{
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if (scope-- != 0) continue;
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result_len = static_cast<int>(ptr - result);
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break;
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}
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}
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*len = result_len;
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return result;
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}
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char const *Dqn_Header__ParseFunctionComment(char const *ptr, isize *len)
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{
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while (ptr[0] != '"') ptr++;
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ptr++;
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char const *result = ptr;
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isize result_len = 0;
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for (;;)
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{
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while (ptr[0] != '"')
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ptr++;
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if (ptr[-1] != '\\')
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{
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result_len = ptr - result;
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break;
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}
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}
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*len = result_len;
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return result;
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}
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int main(int argc, char *argv[])
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{
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if (argc < 1)
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{
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fprintf(stdout, "DqnHeader Usage: %s [<source code filename>, ...]\n", argv[0]);
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return 0;
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}
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Dqn_MemArena arena = {};
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for (isize arg_index = 1; arg_index < argc; ++arg_index)
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{
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char const *file = argv[arg_index];
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isize buf_size = 0;
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char *buf = Dqn_FileReadWithArena(&arena, file, &buf_size);
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if (!buf)
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{
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fprintf(stderr, "Failed to read file: %s\n", file);
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continue;
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}
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char constexpr HEADER_COPY_PROTOTYPE[] = "DQN_HEADER_COPY_PROTOTYPE";
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char constexpr HEADER_COMMENT[] = "// @";
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enum struct FindString
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{
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HeaderPrototype,
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HeaderComment,
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Count
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};
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char const *find_list[] = {HEADER_COPY_PROTOTYPE, HEADER_COMMENT};
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isize constexpr find_string_lens[] = {
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Dqn_CharCountI(HEADER_COPY_PROTOTYPE),
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Dqn_CharCountI(HEADER_COMMENT),
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};
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char const *ptr = buf;
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char const *ptr_end = buf + buf_size;
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isize ptr_len = buf_size;
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isize matched_find_index = -1;
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for (char const *token = Dqn_StrMultiFind(ptr, find_list, find_string_lens, Dqn_ArrayCountI(find_list), &matched_find_index, ptr_len);
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token;
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token = Dqn_StrMultiFind(ptr, find_list, find_string_lens, Dqn_ArrayCountI(find_list), &matched_find_index, ptr_len))
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{
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if (matched_find_index == (isize)FindString::HeaderPrototype)
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{
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ptr = token + find_string_lens[matched_find_index] + 1 /*macro start parenthesis*/;
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isize func_type_len = 0;
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char const *func_type = Dqn_Header__ParseFunctionReturnType(ptr, &func_type_len);
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ptr = func_type + func_type_len + 1; // Ptr is at macro comma, skip the comma
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ptr = Dqn_StrSkipWhitespace(ptr);
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isize func_name_len = 0;
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char const *func_name = Dqn_Header__ParseFunctionNameAndParameters(ptr, &func_name_len);
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ptr = func_name + func_name_len + 1; // Ptr is at macro closing paren, skip the paren
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fprintf(stdout, "%.*s %.*s;\n", (int)func_type_len, func_type, (int)func_name_len, func_name);
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}
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else if (matched_find_index == (isize)FindString::HeaderComment)
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{
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char const *comment_start = token;
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ptr = token;
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while (ptr[0] != '\n' && ptr[0] != '\r')
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ptr++;
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isize comment_len = ptr - comment_start;
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fprintf(stdout, "%.*s\n", (int)comment_len, comment_start);
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ptr = comment_start + comment_len;
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}
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ptr_len = ptr_end - ptr;
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}
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}
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}
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#undef _CRT_SECURE_NO_WARNINGS
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#endif /* DQN_HEADER_IMPLEMENTATION */
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