4coder/system_shared.cpp

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2016-02-11 17:17:52 +00:00
/*
* Mr. 4th Dimention - Allen Webster
*
* 09.02.2016
*
* Shared system functions
*
*/
// TOP
internal b32
usable_ascii(char c){
b32 result = 1;
if ((c < ' ' || c > '~') && c != '\n' && c != '\r' && c != '\t'){
result = 0;
}
return(result);
}
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internal void
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sysshared_filter_real_files(char **files, i32 *file_count){
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i32 i, j;
i32 end;
end = *file_count;
for (i = 0, j = 0; i < end; ++i){
if (system_file_can_be_made(files[i])){
files[j] = files[i];
++j;
}
}
*file_count = j;
}
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void
ex__file_insert(File_Slot *pos, File_Slot *file){
file->next = pos->next;
file->next->prev = file;
file->prev = pos;
pos->next = file;
}
void
ex__insert_range(File_Slot *start, File_Slot *end, File_Slot *pos){
end->next->prev = start->prev;
start->prev->next = end->next;
end->next = pos->next;
start->prev = pos;
pos->next->prev = end;
pos->next = start;
}
internal void
ex__check_file(File_Slot *pos){
File_Slot *file = pos;
Assert(pos == pos->next->prev);
for (pos = pos->next;
file != pos;
pos = pos->next){
Assert(pos == pos->next->prev);
}
}
internal void
ex__check(File_Exchange *file_exchange){
ex__check_file(&file_exchange->available);
ex__check_file(&file_exchange->active);
ex__check_file(&file_exchange->free_list);
}
internal void
sysshared_init_file_exchange(
Exchange *exchange, File_Slot *slots, i32 max,
char **filename_space_out){
char *filename_space;
i32 i;
exchange->file.max = max;
exchange->file.available = {};
exchange->file.available.next = &exchange->file.available;
exchange->file.available.prev = &exchange->file.available;
exchange->file.active = {};
exchange->file.active.next = &exchange->file.active;
exchange->file.active.prev = &exchange->file.active;
exchange->file.free_list = {};
exchange->file.free_list.next = &exchange->file.free_list;
exchange->file.free_list.prev = &exchange->file.free_list;
exchange->file.files = slots;
memset(slots, 0, sizeof(File_Slot)*max);
filename_space = (char*)
system_get_memory(FileNameMax*exchange->file.max);
File_Slot *slot = slots;
for (i = 0; i < exchange->file.max; ++i, ++slot){
ex__file_insert(&exchange->file.available, slot);
slot->filename = filename_space;
filename_space += FileNameMax;
}
if (filename_space_out) *filename_space_out = filename_space;
}
internal void
fnt__remove(Font_Load_Parameters *params){
params->next->prev = params->prev;
params->prev->next = params->next;
}
internal void
fnt__insert(Font_Load_Parameters *pos, Font_Load_Parameters *params){
params->next = pos->next;
pos->next->prev = params;
pos->next = params;
params->prev = pos;
}
internal void
sysshared_init_font_params(
Font_Load_System *fnt, Font_Load_Parameters *params, i32 max){
Font_Load_Parameters *param;
i32 i;
fnt->params = params;
fnt->max = max;
fnt->free_param.next = &fnt->free_param;
fnt->free_param.prev = &fnt->free_param;
fnt->used_param.next = &fnt->free_param;
fnt->used_param.prev = &fnt->free_param;
param = params;
for (i = 0; i < max; ++i, ++param){
fnt__insert(&fnt->free_param, param);
}
}
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// BOTTOM