450 lines
16 KiB
C++
450 lines
16 KiB
C++
/*
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* Mr. 4th Dimention - Allen Webster
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*
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* 18.07.2017
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*
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* General win32 functions
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*
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*/
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// TOP
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//
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// 4ed path
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//
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internal
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Sys_Get_Current_Path_Sig(system_get_current_path){
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i32 result = GetCurrentDirectory_utf8(&shared_vars.scratch, capacity, (u8*)out);
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return(result);
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}
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internal
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Sys_Get_4ed_Path_Sig(system_get_4ed_path){
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i32 size = GetModuleFileName_utf8(&shared_vars.scratch, 0, (u8*)out, capacity);
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if (size < capacity - 1){
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String str = make_string(out, size);
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remove_last_folder(&str);
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terminate_with_null(&str);
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size = str.size;
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}
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return(size);
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}
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//
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// Logging
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//
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internal
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Sys_Log_Sig(system_log){
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if (plat_settings.use_log){
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u8 space[4096];
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String str = make_fixed_width_string(space);
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str.size = system_get_4ed_path(str.str, str.memory_size);
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append_sc(&str, "4coder_log.txt");
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terminate_with_null(&str);
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HANDLE file = CreateFile_utf8(&shared_vars.scratch, space, GENERIC_WRITE, 0, 0, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
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if (file != INVALID_HANDLE_VALUE){
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SetFilePointer(file, win32vars.log_position, 0, FILE_BEGIN);
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win32vars.log_position += length;
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DWORD written = 0;
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DWORD total_written = 0;
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do{
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WriteFile(file, message + total_written, length - total_written, &written, 0);
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total_written += written;
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}while (total_written < length);
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CloseHandle(file);
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}
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}
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}
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//
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// Shared system functions (system_shared.h)
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//
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internal
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Sys_File_Can_Be_Made_Sig(system_file_can_be_made){
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HANDLE file = CreateFile_utf8(&shared_vars.scratch, filename, FILE_APPEND_DATA, 0, 0, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
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b32 result = false;
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if (file != INVALID_HANDLE_VALUE){
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CloseHandle(file);
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result = true;
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}
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return(result);
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}
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//
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// Memory
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//
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internal void*
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system_memory_allocate_extended(void *base, umem size){
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void *result = VirtualAlloc(base, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
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return(result);
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}
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internal
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Sys_Memory_Allocate_Sig(system_memory_allocate){
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return(system_memory_allocate_extended(0, size));
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}
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internal
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Sys_Memory_Set_Protection_Sig(system_memory_set_protection){
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bool32 result = false;
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DWORD old_protect = 0;
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DWORD protect = 0;
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switch (flags & 0x7){
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case 0: protect = PAGE_NOACCESS; break;
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case MemProtect_Read: protect = PAGE_READONLY; break;
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case MemProtect_Write: /* below */
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case MemProtect_Write|MemProtect_Read: protect = PAGE_READWRITE; break;
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case MemProtect_Execute: protect = PAGE_EXECUTE; break;
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case MemProtect_Execute|MemProtect_Read: protect = PAGE_EXECUTE_READ; break;
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case MemProtect_Execute|MemProtect_Write: /* below */
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case MemProtect_Execute|MemProtect_Write|MemProtect_Read: protect = PAGE_EXECUTE_READWRITE; break;
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}
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VirtualProtect(ptr, size, protect, &old_protect);
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return(result);
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}
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internal
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Sys_Memory_Free_Sig(system_memory_free){
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VirtualFree(ptr, 0, MEM_RELEASE);
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}
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//
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// Files
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//
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internal String
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win32_remove_unc_prefix_characters(String path){
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if (match_part(path, make_lit_string("\\\\?\\UNC"))){
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path.size -= 6;
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memmove(path.str, path.str + 6, path.size);
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path.str[0] = '\\';
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}
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else if (match_part(path, make_lit_string("\\\\?\\"))){
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path.size -= 4;
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memmove(path.str, path.str + 4, path.size);
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}
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return(path);
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}
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internal
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Sys_Set_File_List_Sig(system_set_file_list){
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b32 clear_list = true;
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if (directory != 0){
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char dir_space[MAX_PATH + 32];
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String dir = make_string_cap(dir_space, 0, MAX_PATH + 32);
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append_sc(&dir, directory);
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terminate_with_null(&dir);
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HANDLE dir_handle = CreateFile_utf8(&shared_vars.scratch, (u8*)dir.str, FILE_LIST_DIRECTORY, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OVERLAPPED, 0);
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if (dir_handle != INVALID_HANDLE_VALUE){
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DWORD final_length = GetFinalPathNameByHandle_utf8(&shared_vars.scratch, dir_handle, (u8*)dir_space, sizeof(dir_space), 0);
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CloseHandle(dir_handle);
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if (final_length + 3 < sizeof(dir_space)){
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u8 *c_str_dir = (u8*)dir_space;
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if (c_str_dir[final_length - 1] == 0){
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--final_length;
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}
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String str_dir = make_string(c_str_dir, final_length);
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String adjusted_str_dir = win32_remove_unc_prefix_characters(str_dir);
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c_str_dir = (u8*)adjusted_str_dir.str;
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final_length = adjusted_str_dir.size;
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c_str_dir[final_length] = '\\';
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c_str_dir[final_length + 1] = '*';
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c_str_dir[final_length + 2] = 0;
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if (canon_directory_out != 0){
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if (final_length+1 < canon_directory_max){
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memcpy(canon_directory_out, c_str_dir, final_length);
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if (canon_directory_out[final_length-1] != '\\'){
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canon_directory_out[final_length++] = '\\';
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}
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canon_directory_out[final_length] = 0;
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*canon_directory_size_out = final_length;
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}
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else{
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u32 length = copy_fast_unsafe_cc(canon_directory_out, directory);
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canon_directory_out[length] = 0;
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*canon_directory_size_out = length;
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}
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}
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WIN32_FIND_DATA find_data;
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HANDLE search = FindFirstFile_utf8(&shared_vars.scratch, c_str_dir, &find_data);
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if (search != INVALID_HANDLE_VALUE){
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u32 character_count = 0;
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u32 file_count = 0;
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BOOL more_files = true;
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do{
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b32 nav_dir =
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(find_data.cFileName[0] == '.' && find_data.cFileName[1] == 0) ||(find_data.cFileName[0] == '.' && find_data.cFileName[1] == '.' && find_data.cFileName[2] == 0);
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if (!nav_dir){
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++file_count;
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u32 size = 0;
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for(;find_data.cFileName[size];++size);
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character_count += size + 1;
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}
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more_files = FindNextFile(search, &find_data);
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}while(more_files);
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FindClose(search);
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u32 remaining_size = character_count*2;
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u32 required_size = remaining_size + file_count*sizeof(File_Info);
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if (file_list->block_size < required_size){
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system_memory_free(file_list->block, 0);
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file_list->block = system_memory_allocate(required_size);
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file_list->block_size = required_size;
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}
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file_list->infos = (File_Info*)file_list->block;
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u8 *name = (u8*)(file_list->infos + file_count);
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u32 corrected_file_count = 0;
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if (file_list->block != 0){
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search = FindFirstFile_utf8(&shared_vars.scratch, c_str_dir, &find_data);
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if (search != INVALID_HANDLE_VALUE){
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File_Info *info = file_list->infos;
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more_files = true;
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do{
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b32 nav_dir =
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(find_data.cFileName[0] == '.' && find_data.cFileName[1] == 0) ||(find_data.cFileName[0] == '.' && find_data.cFileName[1] == '.' && find_data.cFileName[2] == 0);
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if (!nav_dir){
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u32 attribs = find_data.dwFileAttributes;
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info->folder = (attribs & FILE_ATTRIBUTE_DIRECTORY) != 0;
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info->filename = (char*)name;
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u16 *src = (u16*)find_data.cFileName;
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u32 src_len = 0;
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for (;src[src_len];++src_len);
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u8 *dst = name;
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u32 max = remaining_size-1;
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b32 error = false;
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u32 length = (u32)utf16_to_utf8_minimal_checking(dst, max, src, src_len, &error);
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if (length <= max && !error){
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name += length;
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info->filename_len = length;
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*name++ = 0;
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String fname = make_string_cap(info->filename, length, length+1);
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replace_char(&fname, '\\', '/');
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++info;
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++corrected_file_count;
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}
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}
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more_files = FindNextFile(search, &find_data);
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}while(more_files);
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FindClose(search);
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file_list->count = corrected_file_count;
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clear_list = false;
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}
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}
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}
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}
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}
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}
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if (clear_list){
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system_memory_free(file_list->block, 0);
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file_list->block = 0;
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file_list->block_size = 0;
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file_list->infos = 0;
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file_list->count = 0;
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}
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}
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internal
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Sys_Get_Canonical_Sig(system_get_canonical){
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u32 result = 0;
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char src_space[MAX_PATH + 32];
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if (len < sizeof(src_space) &&
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(len >= 2 &&
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((filename[0] >= 'a' && filename[0] <= 'z') ||
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(filename[0] >= 'A' && filename[0] <= 'Z')) && filename[1] == ':') ||
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(filename[0] == '\\' && filename[1] == '\\')){
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memcpy(src_space, filename, len);
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src_space[len] = 0;
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HANDLE file = CreateFile_utf8(&shared_vars.scratch, (u8*)src_space, GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
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if (file != INVALID_HANDLE_VALUE){
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DWORD final_length = GetFinalPathNameByHandle_utf8(&shared_vars.scratch, file, (u8*)buffer, max, 0);
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if (final_length + 3 < max){
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if (buffer[final_length - 1] == 0){
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--final_length;
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}
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String str_dir = make_string(buffer, final_length);
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String adjusted_str_dir = win32_remove_unc_prefix_characters(str_dir);
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buffer = adjusted_str_dir.str;
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final_length = adjusted_str_dir.size;
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buffer[final_length] = 0;
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result = final_length;
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}
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CloseHandle(file);
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}
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else{
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String src_str = make_string(filename, len);
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String path_str = path_of_directory(src_str);
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String front_str = front_of_directory(src_str);
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memcpy(src_space, path_str.str, path_str.size);
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src_space[path_str.size] = 0;
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HANDLE dir = CreateFile_utf8(&shared_vars.scratch, (u8*)src_space, FILE_LIST_DIRECTORY, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OVERLAPPED, 0);
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if (dir != INVALID_HANDLE_VALUE){
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DWORD final_length = GetFinalPathNameByHandle_utf8(&shared_vars.scratch, dir, (u8*)buffer, max, 0);
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if (final_length + 3 < max){
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if (buffer[final_length-1] == 0){
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--final_length;
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}
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String str_dir = make_string(buffer, final_length);
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String adjusted_str_dir = win32_remove_unc_prefix_characters(str_dir);
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buffer = adjusted_str_dir.str;
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final_length = adjusted_str_dir.size;
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buffer[final_length++] = '\\';
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memcpy(buffer + final_length, front_str.str, front_str.size);
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final_length += front_str.size;
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buffer[final_length] = 0;
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result = final_length;
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}
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CloseHandle(dir);
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}
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}
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}
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return(result);
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}
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internal File_Attributes
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win32_file_attributes_from_HANDLE(HANDLE file){
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BY_HANDLE_FILE_INFORMATION info = {};
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GetFileInformationByHandle(file, &info);
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File_Attributes result = {};
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result.size = ((u64)info.nFileSizeHigh << 32LL) | ((u64)info.nFileSizeLow);
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result.last_write_time = ((u64)info.ftLastWriteTime.dwHighDateTime << 32LL) | ((u64)info.ftLastWriteTime.dwLowDateTime);
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return(result);
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}
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internal
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Sys_Load_Handle_Sig(system_load_handle){
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b32 result = false;
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HANDLE file = CreateFile_utf8(&shared_vars.scratch, (u8*)filename, GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
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if (file != INVALID_HANDLE_VALUE){
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*(HANDLE*)handle_out = file;
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result = true;
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}
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return(result);
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}
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internal
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Sys_Load_Attributes_Sig(system_load_attributes){
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HANDLE file = *(HANDLE*)(&handle);
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return(win32_file_attributes_from_HANDLE(file));
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}
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internal
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Sys_Load_File_Sig(system_load_file){
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HANDLE file = *(HANDLE*)(&handle);
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DWORD read_size = 0;
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b32 result = false;
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if (ReadFile(file, buffer, size, &read_size, 0)){
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if (read_size == size){
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result = true;
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}
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}
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return(result);
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}
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internal
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Sys_Load_Close_Sig(system_load_close){
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b32 result = false;
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HANDLE file = *(HANDLE*)(&handle);
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if (CloseHandle(file)){
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result = true;
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}
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return(result);
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}
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internal
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Sys_Save_File_Sig(system_save_file){
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File_Attributes result = {};
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HANDLE file = CreateFile_utf8(&shared_vars.scratch, (u8*)filename, GENERIC_WRITE, 0, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
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if (file != INVALID_HANDLE_VALUE){
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DWORD written_total = 0;
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DWORD written_size = 0;
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b32 success = true;
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for (;written_total < size;){
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if (!WriteFile(file, buffer + written_total, size - written_total, &written_size, 0)){
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success = false;
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break;
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}
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written_total += written_size;
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}
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if (success){
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result = win32_file_attributes_from_HANDLE(file);
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}
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CloseHandle(file);
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}
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return(result);
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}
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//
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// File System
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//
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internal
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Sys_File_Exists_Sig(system_file_exists){
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char full_filename_space[1024];
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String full_filename;
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HANDLE file;
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b32 result = 0;
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if (len < sizeof(full_filename_space)){
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full_filename = make_fixed_width_string(full_filename_space);
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copy_ss(&full_filename, make_string(filename, len));
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terminate_with_null(&full_filename);
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file = CreateFile_utf8(&shared_vars.scratch, (u8*)full_filename.str, GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
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if (file != INVALID_HANDLE_VALUE){
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CloseHandle(file);
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result = 1;
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}
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}
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return(result);
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}
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internal b32
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system_directory_exists(char *path){
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DWORD attrib = GetFileAttributes_utf8(&shared_vars.scratch, (u8*)path);
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return(attrib != INVALID_FILE_ATTRIBUTES && (attrib & FILE_ATTRIBUTE_DIRECTORY));
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}
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// BOTTOM
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