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