4coder/platform_all/4ed_system_shared.cpp

229 lines
5.9 KiB
C++

/*
* Mr. 4th Dimention - Allen Webster
*
* 09.02.2016
*
* Shared system functions
*
*/
// TOP
#if !defined(FCODER_SYSTEM_SHARED_CPP)
#define FCODER_SYSTEM_SHARED_CPP
//
// Standard implementation of file system stuff based on the file track layer.
//
internal i32
system_get_binary_path_string(String *out){
out->size = system_get_4ed_path(out->str, out->memory_size);
return(out->size);
}
internal void
init_shared_vars(){
umem scratch_size = KB(128);
void *scratch_memory = system_memory_allocate(scratch_size);
shared_vars.scratch = make_part(scratch_memory, (i32)scratch_size);
shared_vars.track_table_size = KB(16);
shared_vars.track_table = system_memory_allocate(shared_vars.track_table_size);
shared_vars.track_node_size = KB(16);
void *track_nodes = system_memory_allocate(shared_vars.track_node_size);
i32 track_result = init_track_system(&shared_vars.track, &shared_vars.scratch, shared_vars.track_table, shared_vars.track_table_size, track_nodes, shared_vars.track_node_size);
if (track_result != FileTrack_Good){
exit(1);
}
}
internal b32
handle_track_out_of_memory(i32 val){
b32 result = false;
switch (val){
case FileTrack_OutOfTableMemory:
{
u32 new_table_size = shared_vars.track_table_size*2;
void *new_table = system_memory_allocate(new_table_size);
move_track_system(&shared_vars.track, &shared_vars.scratch, new_table, new_table_size);
system_memory_free(shared_vars.track_table, shared_vars.track_table_size);
shared_vars.track_table_size = new_table_size;
shared_vars.track_table = new_table;
}break;
case FileTrack_OutOfListenerMemory:
{
shared_vars.track_node_size *= 2;
void *node_expansion = system_memory_allocate(shared_vars.track_node_size);
expand_track_system_listeners(&shared_vars.track, &shared_vars.scratch, node_expansion, shared_vars.track_node_size);
}break;
default: result = true; break;
}
return(result);
}
internal
Sys_Add_Listener_Sig(system_add_listener){
b32 result = false;
for (;;){
i32 track_result = add_listener(&shared_vars.track, &shared_vars.scratch, (u8*)filename);
if (handle_track_out_of_memory(track_result)){
if (track_result == FileTrack_Good){
result = true;
}
break;
}
}
return(result);
}
internal
Sys_Remove_Listener_Sig(system_remove_listener){
b32 result = false;
i32 track_result = remove_listener(&shared_vars.track, &shared_vars.scratch, (u8*)filename);
if (track_result == FileTrack_Good){
result = true;
}
return(result);
}
internal
Sys_Get_File_Change_Sig(system_get_file_change){
b32 result = false;
i32 size = 0;
i32 get_result = get_change_event(&shared_vars.track, &shared_vars.scratch, (u8*)buffer, max, &size);
*required_size = size;
*mem_too_small = false;
if (get_result == FileTrack_Good){
result = true;
}
else if (get_result == FileTrack_MemoryTooSmall){
*mem_too_small = true;
result = true;
}
return(result);
}
//
// General shared pieces
//
internal File_Data
sysshared_load_file(char *filename){
File_Data result = {0};
Plat_Handle handle = {0};
if (system_load_handle(filename, &handle)){
u32 size = system_load_size(handle);
result.got_file = 1;
if (size > 0){
result.size = size;
result.data = (char*)system_memory_allocate(size+1);
if (!result.data){
result = null_file_data;
}
else{
if (!system_load_file(handle, result.data, size)){
system_memory_free(result.data, size+1);
result = null_file_data;
}
}
}
system_load_close(handle);
}
return(result);
}
internal b32
usable_ascii(char c){
b32 result = true;
if ((c < ' ' || c > '~') && c != '\n' && c != '\r' && c != '\t'){
result = false;
}
return(result);
}
internal void
sysshared_filter_real_files(char **files, i32 *file_count){
i32 end = *file_count;
i32 i = 0, j = 0;
for (; i < end; ++i){
if (system_file_can_be_made((u8*)files[i])){
files[j] = files[i];
++j;
}
}
*file_count = j;
}
internal Partition
sysshared_scratch_partition(i32 size){
void *data = system_memory_allocate((umem)size);
Partition part = make_part(data, size);
return(part);
}
internal void
sysshared_partition_grow(Partition *part, i32 new_size){
void *data = 0;
if (new_size > part->max){
// TODO(allen): attempt to grow in place by just acquiring next vpages?!
data = system_memory_allocate((umem)new_size);
memcpy(data, part->base, part->pos);
system_memory_free(part->base, part->max);
part->base = (char*)data;
part->max = new_size;
}
}
internal void
sysshared_partition_double(Partition *part){
sysshared_partition_grow(part, part->max*2);
}
internal void*
sysshared_push_block(Partition *part, i32 size){
void *result = 0;
result = push_block(part, size);
if (!result){
sysshared_partition_grow(part, size+part->max);
result = push_block(part, size);
}
return(result);
}
internal b32
sysshared_to_binary_path(String *out_filename, char *filename){
b32 translate_success = 0;
i32 max = out_filename->memory_size;
i32 size = out_filename->size = system_get_4ed_path(out_filename->str, out_filename->memory_size);
if (size > 0 && size < max-1){
out_filename->size = size;
if (append_sc(out_filename, filename) && terminate_with_null(out_filename)){
translate_success = 1;
}
}
return(translate_success);
}
#endif
// BOTTOM