329 lines
13 KiB
C++
329 lines
13 KiB
C++
/*
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4coder_function_list.cpp - Command for listing all functions in a C/C++ file in a jump list.
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*/
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// TOP
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// NOTE(allen|a4.0.14): This turned out to be a nasty little routine. There might
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// be a better way to do it with just tokens that I didn't see the first time
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// through. Once I build a real parser this should become almost just as easy as
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// iterating tokens is now.
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//
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// This version can be dropped anywhere underneath 4coder_default_include.cpp and
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// will then provide the "list_all_functions_current_buffer" command.
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//
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static Get_Positions_Results
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get_function_positions(Application_Links *app, Buffer_Summary *buffer, int32_t token_index, Function_Positions *positions_array, int32_t positions_max){
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Get_Positions_Results result = {0};
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static const int32_t token_chunk_size = 512;
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Cpp_Token token_chunk[token_chunk_size];
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Stream_Tokens token_stream = {0};
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if (init_stream_tokens(&token_stream, app, buffer, token_index, token_chunk, token_chunk_size)){
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int32_t nest_level = 0;
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int32_t paren_nest_level = 0;
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int32_t first_paren_index = 0;
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int32_t first_paren_position = 0;
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int32_t last_paren_index = 0;
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bool32 still_looping = false;
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// Look for the next token at global scope that might need to be printed.
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mode1:
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Assert(nest_level == 0);
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Assert(paren_nest_level == 0);
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first_paren_index = 0;
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first_paren_position = 0;
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last_paren_index = 0;
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do{
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for (; token_index < token_stream.end; ++token_index){
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Cpp_Token *token = &token_stream.tokens[token_index];
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if (!(token->flags & CPP_TFLAG_PP_BODY)){
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switch (token->type){
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case CPP_TOKEN_BRACE_OPEN:
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{
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++nest_level;
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}break;
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case CPP_TOKEN_BRACE_CLOSE:
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{
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if (nest_level > 0){
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--nest_level;
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}
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}break;
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case CPP_TOKEN_PARENTHESE_OPEN:
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{
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if (nest_level == 0){
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first_paren_index = token_index;
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first_paren_position = token->start;
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goto paren_mode1;
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}
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}break;
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}
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}
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}
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still_looping = forward_stream_tokens(&token_stream);
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}while(still_looping);
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goto end;
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// Look for a closing parenthese to mark the end of a function signature.
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paren_mode1:
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paren_nest_level = 0;
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do{
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for (; token_index < token_stream.end; ++token_index){
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Cpp_Token *token = &token_stream.tokens[token_index];
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if (!(token->flags & CPP_TFLAG_PP_BODY)){
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switch (token->type){
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case CPP_TOKEN_PARENTHESE_OPEN:
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{
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++paren_nest_level;
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}break;
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case CPP_TOKEN_PARENTHESE_CLOSE:
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{
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--paren_nest_level;
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if (paren_nest_level == 0){
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last_paren_index = token_index;
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goto paren_mode2;
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}
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}break;
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}
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}
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}
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still_looping = forward_stream_tokens(&token_stream);
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}while(still_looping);
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goto end;
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// Look backwards from an open parenthese to find the start of a function signature.
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paren_mode2: {
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Stream_Tokens backward_stream_temp = begin_temp_stream_token(&token_stream);
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int32_t local_index = first_paren_index;
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int32_t signature_start_index = 0;
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do{
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for (; local_index >= token_stream.start; --local_index){
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Cpp_Token *token = &token_stream.tokens[local_index];
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if ((token->flags & CPP_TFLAG_PP_BODY) || (token->flags & CPP_TFLAG_PP_DIRECTIVE) || token->type == CPP_TOKEN_BRACE_CLOSE || token->type == CPP_TOKEN_SEMICOLON || token->type == CPP_TOKEN_PARENTHESE_CLOSE){
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++local_index;
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signature_start_index = local_index;
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goto paren_mode2_done;
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}
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}
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still_looping = backward_stream_tokens(&token_stream);
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}while(still_looping);
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// When this loop ends by going all the way back to the beginning set the signature start to 0 and fall through to the printing phase.
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signature_start_index = 0;
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paren_mode2_done:;
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{
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Function_Positions positions;
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positions.sig_start_index = signature_start_index;
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positions.sig_end_index = last_paren_index;
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positions.open_paren_pos = first_paren_position;
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positions_array[result.positions_count++] = positions;
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}
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end_temp_stream_token(&token_stream, backward_stream_temp);
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if (result.positions_count >= positions_max){
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result.next_token_index = token_index;
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result.still_looping = true;
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goto end;
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}
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goto mode1;
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}
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end:;
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}
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return(result);
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}
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static void
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print_positions(Application_Links *app, Buffer_Summary *buffer, Function_Positions *positions_array, int32_t positions_count, Buffer_Summary *output_buffer, Partition *part){
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Temp_Memory temp = begin_temp_memory(part);
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Partition extra_memory_ = partition_sub_part(part, (4<<10));
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Partition *extra_memory = &extra_memory_;
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char *str_ptr = (char*)partition_current(part);
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int32_t part_size = 0;
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String buffer_name = make_string(buffer->buffer_name, buffer->buffer_name_len);
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int32_t size = output_buffer->size;
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for (int32_t i = 0; i < positions_count; ++i){
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Function_Positions *positions = &positions_array[i];
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Temp_Memory extra_temp = begin_temp_memory(extra_memory);
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int32_t local_index = positions->sig_start_index;
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int32_t end_index = positions->sig_end_index;
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int32_t open_paren_pos = positions->open_paren_pos;
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Assert(end_index > local_index);
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static const int32_t sig_chunk_size = 64;
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Cpp_Token sig_chunk[sig_chunk_size];
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Stream_Tokens sig_stream = {0};
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if (init_stream_tokens(&sig_stream, app, buffer, local_index, sig_chunk, sig_chunk_size)){
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bool32 still_looping = false;
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do{
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for (; local_index < sig_stream.end; ++local_index){
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Cpp_Token *token = &sig_stream.tokens[local_index];
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if (!(token->flags & CPP_TFLAG_PP_BODY) && token->type != CPP_TOKEN_COMMENT){
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bool32 delete_space_before = false;
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bool32 space_after = false;
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switch (token->type){
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case CPP_TOKEN_PARENTHESE_OPEN:
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case CPP_TOKEN_PARENTHESE_CLOSE:
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{
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delete_space_before = true;
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}break;
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case CPP_TOKEN_IDENTIFIER:
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case CPP_TOKEN_STAR:
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{
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space_after = true;
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}break;
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case CPP_TOKEN_COMMA:
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{
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delete_space_before = true;
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space_after = true;
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}break;
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}
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if (token->flags & CPP_TFLAG_IS_KEYWORD){
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space_after = true;
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}
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if (delete_space_before){
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int32_t pos = extra_memory->pos - 1;
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char *base = ((char*)(extra_memory->base));
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if (pos >= 0 && base[pos] == ' '){
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extra_memory->pos = pos;
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}
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}
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char *token_str = push_array(extra_memory, char, token->size + space_after);
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if (token_str != 0){
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buffer_read_range(app, buffer, token->start, token->start + token->size, token_str);
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if (space_after){
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token_str[token->size] = ' ';
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}
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}
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else{
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goto finish_print;
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}
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}
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if (local_index == end_index){
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goto finish_print;
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}
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}
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still_looping = forward_stream_tokens(&sig_stream);
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}while(still_looping);
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finish_print:;
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{
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int32_t sig_size = extra_memory->pos;
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String sig = make_string(extra_memory->base, sig_size);
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int32_t line_number = buffer_get_line_number(app, buffer, open_paren_pos);
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int32_t line_number_len = int_to_str_size(line_number);
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int32_t append_len = buffer_name.size + 1 + line_number_len + 1 + 1 + sig_size + 1;
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char *out_space = push_array(part, char, append_len);
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if (out_space == 0){
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buffer_replace_range(app, output_buffer, size, size, str_ptr, part_size);
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size += part_size;
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end_temp_memory(temp);
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temp = begin_temp_memory(part);
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part_size = 0;
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out_space = push_array(part, char, append_len);
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}
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part_size += append_len;
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String out = make_string(out_space, 0, append_len);
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append(&out, buffer_name);
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append(&out, ':');
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append_int_to_str(&out, line_number);
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append(&out, ':');
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append(&out, ' ');
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append(&out, sig);
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append(&out, '\n');
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}
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}
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end_temp_memory(extra_temp);
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}
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buffer_replace_range(app, output_buffer, size, size, str_ptr, part_size);
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end_temp_memory(temp);
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}
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static void
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list_all_functions(Application_Links *app, Partition *part, Buffer_Summary *buffer){
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String search_name = make_lit_string("*decls*");
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Buffer_Summary decls_buffer = get_buffer_by_name(app, search_name.str, search_name.size, AccessAll);
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if (!decls_buffer.exists){
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decls_buffer = create_buffer(app, search_name.str, search_name.size, BufferCreate_AlwaysNew);
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buffer_set_setting(app, &decls_buffer, BufferSetting_Unimportant, true);
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buffer_set_setting(app, &decls_buffer, BufferSetting_ReadOnly, true);
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buffer_set_setting(app, &decls_buffer, BufferSetting_WrapLine, false);
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}
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else{
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buffer_send_end_signal(app, &decls_buffer);
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buffer_replace_range(app, &decls_buffer, 0, decls_buffer.size, 0, 0);
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}
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Temp_Memory temp = begin_temp_memory(part);
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int32_t positions_max = (4<<10)/sizeof(Function_Positions);
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Function_Positions *positions_array = push_array(part, Function_Positions, positions_max);
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int32_t token_index = 0;
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bool32 still_looping = false;
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do{
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Get_Positions_Results get_positions_results = get_function_positions(app, buffer, token_index, positions_array, positions_max);
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int32_t positions_count = get_positions_results.positions_count;
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token_index = get_positions_results.next_token_index;
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still_looping = get_positions_results.still_looping;
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print_positions(app, buffer, positions_array, positions_count, &decls_buffer, part);
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}while(still_looping);
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View_Summary view = get_active_view(app, AccessAll);
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view_set_buffer(app, &view, decls_buffer.buffer_id, 0);
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lock_jump_buffer(search_name.str, search_name.size);
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end_temp_memory(temp);
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}
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CUSTOM_COMMAND_SIG(list_all_functions_current_buffer)
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CUSTOM_DOC("Creates a jump list of lines of the current buffer that appear to define or declare functions.")
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{
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uint32_t access = AccessProtected;
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View_Summary view = get_active_view(app, access);
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Buffer_Summary buffer = get_buffer(app, view.buffer_id, access);
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list_all_functions(app, &global_part, &buffer);
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}
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// BOTTOM
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