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4coder/platform_win32/win32_4ed_functions.cpp

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/*
* Mr. 4th Dimention - Allen Webster
*
* 18.07.2017
*
* General win32 functions
*
*/
// TOP
//
// Shared system functions (system_shared.h)
//
internal
Sys_File_Can_Be_Made_Sig(system_file_can_be_made){
HANDLE file = CreateFile_utf8(&shared_vars.scratch, filename, FILE_APPEND_DATA, 0, 0, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
b32 result = false;
if (file != INVALID_HANDLE_VALUE){
CloseHandle(file);
result = true;
}
return(result);
}
//
// Memory
//
internal void*
system_memory_allocate_extended(void *base, umem size){
void *result = VirtualAlloc(base, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
return(result);
}
internal
Sys_Memory_Allocate_Sig(system_memory_allocate){
return(system_memory_allocate_extended(0, size));
}
internal
Sys_Memory_Set_Protection_Sig(system_memory_set_protection){
bool32 result = false;
DWORD old_protect = 0;
DWORD protect = 0;
switch (flags & 0x7){
case 0: protect = PAGE_NOACCESS; break;
case MemProtect_Read: protect = PAGE_READONLY; break;
case MemProtect_Write: /* below */
case MemProtect_Write|MemProtect_Read: protect = PAGE_READWRITE; break;
case MemProtect_Execute: protect = PAGE_EXECUTE; break;
case MemProtect_Execute|MemProtect_Read: protect = PAGE_EXECUTE_READ; break;
case MemProtect_Execute|MemProtect_Write: /* below */
case MemProtect_Execute|MemProtect_Write|MemProtect_Read: protect = PAGE_EXECUTE_READWRITE; break;
}
VirtualProtect(ptr, size, protect, &old_protect);
return(result);
}
internal
Sys_Memory_Free_Sig(system_memory_free){
VirtualFree(ptr, 0, MEM_RELEASE);
}
//
// 4ed path
//
internal
Sys_Get_Current_Path_Sig(system_get_current_path){
i32 result = GetCurrentDirectory_utf8(&shared_vars.scratch, capacity, (u8*)out);
return(result);
}
internal
Sys_Get_4ed_Path_Sig(system_get_4ed_path){
local_persist b32 has_stashed_4ed_path = false;
if (!has_stashed_4ed_path){
has_stashed_4ed_path = true;
local_const i32 binary_path_capacity = KB(32);
u8 *memory = (u8*)system_memory_allocate(binary_path_capacity);
i32 size = GetModuleFileName_utf8(&shared_vars.scratch, 0, memory, binary_path_capacity);
Assert(size <= binary_path_capacity - 1);
win32vars.binary_path = make_string(memory, size);
remove_last_folder(&win32vars.binary_path);
terminate_with_null(&win32vars.binary_path);
}
i32 copy_size = Min(win32vars.binary_path.size, capacity);
block_copy(out, win32vars.binary_path.str, copy_size);
return(win32vars.binary_path.size);
}
//
// Logging
//
internal
Sys_Log_Sig(system_log){
if (plat_settings.use_log){
u8 space[4096];
String str = make_fixed_width_string(space);
str.size = system_get_4ed_path(str.str, str.memory_size);
append_sc(&str, "4coder_log.txt");
terminate_with_null(&str);
HANDLE file = CreateFile_utf8(&shared_vars.scratch, space, GENERIC_WRITE, 0, 0, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
if (file != INVALID_HANDLE_VALUE){
SetFilePointer(file, win32vars.log_position, 0, FILE_BEGIN);
win32vars.log_position += length;
DWORD written = 0;
DWORD total_written = 0;
do{
WriteFile(file, message + total_written, length - total_written, &written, 0);
total_written += written;
}while (total_written < length);
CloseHandle(file);
}
}
}
//
// Files
//
internal String
win32_remove_unc_prefix_characters(String path){
if (match_part(path, make_lit_string("\\\\?\\UNC"))){
path.size -= 6;
memmove(path.str, path.str + 6, path.size);
path.str[0] = '\\';
}
else if (match_part(path, make_lit_string("\\\\?\\"))){
path.size -= 4;
memmove(path.str, path.str + 4, path.size);
}
return(path);
}
internal
Sys_Set_File_List_Sig(system_set_file_list){
b32 clear_list = true;
if (directory != 0){
char dir_space[MAX_PATH + 32];
String dir = make_string_cap(dir_space, 0, MAX_PATH + 32);
append_sc(&dir, directory);
terminate_with_null(&dir);
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);
if (dir_handle != INVALID_HANDLE_VALUE){
DWORD final_length = GetFinalPathNameByHandle_utf8(&shared_vars.scratch, dir_handle, (u8*)dir_space, sizeof(dir_space), 0);
CloseHandle(dir_handle);
if (final_length + 3 < sizeof(dir_space)){
u8 *c_str_dir = (u8*)dir_space;
if (c_str_dir[final_length - 1] == 0){
--final_length;
}
String str_dir = make_string(c_str_dir, final_length);
String adjusted_str_dir = win32_remove_unc_prefix_characters(str_dir);
c_str_dir = (u8*)adjusted_str_dir.str;
final_length = adjusted_str_dir.size;
c_str_dir[final_length] = '\\';
c_str_dir[final_length + 1] = '*';
c_str_dir[final_length + 2] = 0;
if (canon_directory_out != 0){
if (final_length+1 < canon_directory_max){
memcpy(canon_directory_out, c_str_dir, final_length);
if (canon_directory_out[final_length-1] != '\\'){
canon_directory_out[final_length++] = '\\';
}
canon_directory_out[final_length] = 0;
*canon_directory_size_out = final_length;
}
else{
u32 length = copy_fast_unsafe_cc(canon_directory_out, directory);
canon_directory_out[length] = 0;
*canon_directory_size_out = length;
}
}
WIN32_FIND_DATA find_data;
HANDLE search = FindFirstFile_utf8(&shared_vars.scratch, c_str_dir, &find_data);
if (search != INVALID_HANDLE_VALUE){
u32 character_count = 0;
u32 file_count = 0;
BOOL more_files = true;
do{
b32 nav_dir =
(find_data.cFileName[0] == '.' && find_data.cFileName[1] == 0) ||(find_data.cFileName[0] == '.' && find_data.cFileName[1] == '.' && find_data.cFileName[2] == 0);
if (!nav_dir){
++file_count;
u32 size = 0;
for(;find_data.cFileName[size];++size);
character_count += size + 1;
}
more_files = FindNextFile(search, &find_data);
}while(more_files);
FindClose(search);
u32 remaining_size = character_count*2;
u32 required_size = remaining_size + file_count*sizeof(File_Info);
if (file_list->block_size < required_size){
system_memory_free(file_list->block, 0);
file_list->block = system_memory_allocate(required_size);
file_list->block_size = required_size;
}
file_list->infos = (File_Info*)file_list->block;
u8 *name = (u8*)(file_list->infos + file_count);
u32 corrected_file_count = 0;
if (file_list->block != 0){
search = FindFirstFile_utf8(&shared_vars.scratch, c_str_dir, &find_data);
if (search != INVALID_HANDLE_VALUE){
File_Info *info = file_list->infos;
more_files = true;
do{
b32 nav_dir =
(find_data.cFileName[0] == '.' && find_data.cFileName[1] == 0) ||(find_data.cFileName[0] == '.' && find_data.cFileName[1] == '.' && find_data.cFileName[2] == 0);
if (!nav_dir){
u32 attribs = find_data.dwFileAttributes;
info->folder = (attribs & FILE_ATTRIBUTE_DIRECTORY) != 0;
info->filename = (char*)name;
u16 *src = (u16*)find_data.cFileName;
u32 src_len = 0;
for (;src[src_len];++src_len);
u8 *dst = name;
u32 max = remaining_size-1;
b32 error = false;
u32 length = (u32)utf16_to_utf8_minimal_checking(dst, max, src, src_len, &error);
if (length <= max && !error){
name += length;
info->filename_len = length;
*name++ = 0;
String fname = make_string_cap(info->filename, length, length+1);
replace_char(&fname, '\\', '/');
++info;
++corrected_file_count;
}
}
more_files = FindNextFile(search, &find_data);
}while(more_files);
FindClose(search);
file_list->count = corrected_file_count;
clear_list = false;
}
}
}
}
}
}
if (clear_list){
system_memory_free(file_list->block, 0);
file_list->block = 0;
file_list->block_size = 0;
file_list->infos = 0;
file_list->count = 0;
}
}
internal
Sys_Get_Canonical_Sig(system_get_canonical){
u32 result = 0;
char src_space[MAX_PATH + 32];
if (len < sizeof(src_space) &&
(len >= 2 &&
((filename[0] >= 'a' && filename[0] <= 'z') ||
(filename[0] >= 'A' && filename[0] <= 'Z')) && filename[1] == ':') ||
(filename[0] == '\\' && filename[1] == '\\')){
memcpy(src_space, filename, len);
src_space[len] = 0;
HANDLE file = CreateFile_utf8(&shared_vars.scratch, (u8*)src_space, GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
if (file != INVALID_HANDLE_VALUE){
DWORD final_length = GetFinalPathNameByHandle_utf8(&shared_vars.scratch, file, (u8*)buffer, max, 0);
if (final_length + 3 < max){
if (buffer[final_length - 1] == 0){
--final_length;
}
String str_dir = make_string(buffer, final_length);
String adjusted_str_dir = win32_remove_unc_prefix_characters(str_dir);
buffer = adjusted_str_dir.str;
final_length = adjusted_str_dir.size;
buffer[final_length] = 0;
result = final_length;
}
CloseHandle(file);
}
else{
String src_str = make_string(filename, len);
String path_str = path_of_directory(src_str);
String front_str = front_of_directory(src_str);
memcpy(src_space, path_str.str, path_str.size);
src_space[path_str.size] = 0;
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);
if (dir != INVALID_HANDLE_VALUE){
DWORD final_length = GetFinalPathNameByHandle_utf8(&shared_vars.scratch, dir, (u8*)buffer, max, 0);
if (final_length + 3 < max){
if (buffer[final_length-1] == 0){
--final_length;
}
String str_dir = make_string(buffer, final_length);
String adjusted_str_dir = win32_remove_unc_prefix_characters(str_dir);
buffer = adjusted_str_dir.str;
final_length = adjusted_str_dir.size;
buffer[final_length++] = '\\';
memcpy(buffer + final_length, front_str.str, front_str.size);
final_length += front_str.size;
buffer[final_length] = 0;
result = final_length;
}
CloseHandle(dir);
}
}
}
return(result);
}
internal File_Attributes
win32_file_attributes_from_HANDLE(HANDLE file){
BY_HANDLE_FILE_INFORMATION info = {};
GetFileInformationByHandle(file, &info);
File_Attributes result = {};
result.size = ((u64)info.nFileSizeHigh << 32LL) | ((u64)info.nFileSizeLow);
result.last_write_time = ((u64)info.ftLastWriteTime.dwHighDateTime << 32LL) | ((u64)info.ftLastWriteTime.dwLowDateTime);
return(result);
}
internal
Sys_Quick_File_Attributes_Sig(system_quick_file_attributes){
WIN32_FILE_ATTRIBUTE_DATA info = {};
File_Attributes result = {};
if (GetFileAttributesEx_utf8String(&shared_vars.scratch, file_name, GetFileExInfoStandard, &info)){
result.size = ((u64)info.nFileSizeHigh << 32LL) | ((u64)info.nFileSizeLow);
result.last_write_time = ((u64)info.ftLastWriteTime.dwHighDateTime << 32LL) | ((u64)info.ftLastWriteTime.dwLowDateTime);
}
return(result);
}
internal
Sys_Load_Handle_Sig(system_load_handle){
b32 result = false;
HANDLE file = CreateFile_utf8(&shared_vars.scratch, (u8*)filename, GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
if (file != INVALID_HANDLE_VALUE){
*(HANDLE*)handle_out = file;
result = true;
}
return(result);
}
internal
Sys_Load_Attributes_Sig(system_load_attributes){
HANDLE file = *(HANDLE*)(&handle);
return(win32_file_attributes_from_HANDLE(file));
}
internal
Sys_Load_File_Sig(system_load_file){
HANDLE file = *(HANDLE*)(&handle);
DWORD read_size = 0;
b32 result = false;
if (ReadFile(file, buffer, size, &read_size, 0)){
if (read_size == size){
result = true;
}
}
return(result);
}
internal
Sys_Load_Close_Sig(system_load_close){
b32 result = false;
HANDLE file = *(HANDLE*)(&handle);
if (CloseHandle(file)){
result = true;
}
return(result);
}
internal
Sys_Save_File_Sig(system_save_file){
File_Attributes result = {};
HANDLE file = CreateFile_utf8(&shared_vars.scratch, (u8*)filename, GENERIC_WRITE, 0, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
if (file != INVALID_HANDLE_VALUE){
DWORD written_total = 0;
DWORD written_size = 0;
b32 success = true;
for (;written_total < size;){
if (!WriteFile(file, buffer + written_total, size - written_total, &written_size, 0)){
success = false;
break;
}
written_total += written_size;
}
if (success){
result = win32_file_attributes_from_HANDLE(file);
}
CloseHandle(file);
}
return(result);
}
//
// File System
//
internal b32
system_directory_exists(char *path){
DWORD attrib = GetFileAttributes_utf8(&shared_vars.scratch, (u8*)path);
return(attrib != INVALID_FILE_ATTRIBUTES && (attrib & FILE_ATTRIBUTE_DIRECTORY));
}
// BOTTOM
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