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Dqn/dqn_os_win32.cpp

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////////////////////////////////////////////////////////////////////////////////////////////////////
//
// $$$$$$\ $$$$$$\ $$\ $$\ $$$$$$\ $$\ $$\ $$$$$$\ $$$$$$\
// $$ __$$\ $$ __$$\ $$ | $\ $$ |\_$$ _|$$$\ $$ |$$ ___$$\ $$ __$$\
// $$ / $$ |$$ / \__| $$ |$$$\ $$ | $$ | $$$$\ $$ |\_/ $$ |\__/ $$ |
// $$ | $$ |\$$$$$$\ $$ $$ $$\$$ | $$ | $$ $$\$$ | $$$$$ / $$$$$$ |
// $$ | $$ | \____$$\ $$$$ _$$$$ | $$ | $$ \$$$$ | \___$$\ $$ ____/
// $$ | $$ |$$\ $$ | $$$ / \$$$ | $$ | $$ |\$$$ |$$\ $$ |$$ |
// $$$$$$ |\$$$$$$ | $$ / \$$ |$$$$$$\ $$ | \$$ |\$$$$$$ |$$$$$$$$\
// \______/ \______/ \__/ \__|\______|\__| \__| \______/ \________|
//
// dqn_os_win32.cpp
//
////////////////////////////////////////////////////////////////////////////////////////////////////
// NOTE: [$VMEM] Dqn_OSMem //////////////////////////////////////////////////////////////////////////
static uint32_t Dqn_OS_MemConvertPageToOSFlags_(uint32_t protect)
{
DQN_ASSERT((protect & ~Dqn_OSMemPage_All) == 0);
DQN_ASSERT(protect != 0);
uint32_t result = 0;
if (protect & Dqn_OSMemPage_NoAccess) {
result = PAGE_NOACCESS;
} else {
if (protect & Dqn_OSMemPage_ReadWrite) {
result = PAGE_READWRITE;
} else if (protect & Dqn_OSMemPage_Read) {
result = PAGE_READONLY;
} else if (protect & Dqn_OSMemPage_Write) {
Dqn_Log_WarningF("Windows does not support write-only pages, granting read+write access");
result = PAGE_READWRITE;
}
}
if (protect & Dqn_OSMemPage_Guard)
result |= PAGE_GUARD;
DQN_ASSERTF(result != PAGE_GUARD, "Page guard is a modifier, you must also specify a page permission like read or/and write");
return result;
}
DQN_API void *Dqn_OS_MemReserve(Dqn_usize size, Dqn_OSMemCommit commit, uint32_t page_flags)
{
unsigned long os_page_flags = Dqn_OS_MemConvertPageToOSFlags_(page_flags);
unsigned long flags = MEM_RESERVE | (commit == Dqn_OSMemCommit_Yes ? MEM_COMMIT : 0);
void *result = VirtualAlloc(nullptr, size, flags, os_page_flags);
return result;
}
DQN_API bool Dqn_OS_MemCommit(void *ptr, Dqn_usize size, uint32_t page_flags)
{
bool result = false;
if (!ptr || size == 0)
return false;
unsigned long os_page_flags = Dqn_OS_MemConvertPageToOSFlags_(page_flags);
result = VirtualAlloc(ptr, size, MEM_COMMIT, os_page_flags) != nullptr;
return result;
}
DQN_API void Dqn_OS_MemDecommit(void *ptr, Dqn_usize size)
{
// NOTE: This is a decommit call, which is explicitly saying to free the
// pages but not the address space, you would use OS_MemRelease to release
// everything.
DQN_MSVC_WARNING_PUSH
DQN_MSVC_WARNING_DISABLE(6250) // Calling 'VirtualFree' without the MEM_RELEASE flag might free memory but not address descriptors (VADs). This causes address space leaks.
VirtualFree(ptr, size, MEM_DECOMMIT);
DQN_MSVC_WARNING_POP
}
DQN_API void Dqn_OS_MemRelease(void *ptr, Dqn_usize size)
{
(void)size;
VirtualFree(ptr, 0, MEM_RELEASE);
}
DQN_API int Dqn_OS_MemProtect(void *ptr, Dqn_usize size, uint32_t page_flags)
{
if (!ptr || size == 0)
return 0;
static Dqn_Str8 const ALIGNMENT_ERROR_MSG =
DQN_STR8("Page protection requires pointers to be page aligned because we "
"can only guard memory at a multiple of the page boundary.");
DQN_ASSERTF(Dqn_IsPowerOfTwoAligned(DQN_CAST(uintptr_t)ptr, g_dqn_library->os_page_size), "%s", ALIGNMENT_ERROR_MSG.data);
DQN_ASSERTF(Dqn_IsPowerOfTwoAligned(size, g_dqn_library->os_page_size), "%s", ALIGNMENT_ERROR_MSG.data);
unsigned long os_page_flags = Dqn_OS_MemConvertPageToOSFlags_(page_flags);
unsigned long prev_flags = 0;
int result = VirtualProtect(ptr, size, os_page_flags, &prev_flags);
(void)prev_flags;
if (result == 0)
DQN_ASSERTF(result, "VirtualProtect failed");
return result;
}
// NOTE: [$DATE] Date //////////////////////////////////////////////////////////////////////////////
DQN_API Dqn_OSDateTime Dqn_OS_DateLocalTimeNow()
{
SYSTEMTIME sys_time;
GetLocalTime(&sys_time);
Dqn_OSDateTime result = {};
result.hour = DQN_CAST(uint8_t) sys_time.wHour;
result.minutes = DQN_CAST(uint8_t) sys_time.wMinute;
result.seconds = DQN_CAST(uint8_t) sys_time.wSecond;
result.day = DQN_CAST(uint8_t) sys_time.wDay;
result.month = DQN_CAST(uint8_t) sys_time.wMonth;
result.year = DQN_CAST(int16_t) sys_time.wYear;
return result;
}
DQN_API uint64_t Dqn_OS_DateUnixTime()
{
const uint64_t UNIX_TIME_START = 0x019DB1DED53E8000; // January 1, 1970 (start of Unix epoch) in "ticks"
const uint64_t TICKS_PER_SECOND = 10'000'000; // Filetime returned is in intervals of 100 nanoseconds
FILETIME file_time;
GetSystemTimeAsFileTime(&file_time);
LARGE_INTEGER date_time;
date_time.u.LowPart = file_time.dwLowDateTime;
date_time.u.HighPart = file_time.dwHighDateTime;
uint64_t result = (date_time.QuadPart - UNIX_TIME_START) / TICKS_PER_SECOND;
return result;
}
DQN_API bool Dqn_OS_SecureRNGBytes(void *buffer, uint32_t size)
{
if (!buffer || size < 0)
return false;
if (size == 0)
return true;
bool init = true;
Dqn_TicketMutex_Begin(&g_dqn_library->win32_bcrypt_rng_mutex);
if (!g_dqn_library->win32_bcrypt_rng_handle)
{
wchar_t const BCRYPT_ALGORITHM[] = L"RNG";
long /*NTSTATUS*/ init_status = BCryptOpenAlgorithmProvider(&g_dqn_library->win32_bcrypt_rng_handle, BCRYPT_ALGORITHM, nullptr /*implementation*/, 0 /*flags*/);
if (!g_dqn_library->win32_bcrypt_rng_handle || init_status != 0)
{
Dqn_Log_ErrorF("Failed to initialise random number generator, error: %d", init_status);
init = false;
}
}
Dqn_TicketMutex_End(&g_dqn_library->win32_bcrypt_rng_mutex);
if (!init)
return false;
long gen_status = BCryptGenRandom(g_dqn_library->win32_bcrypt_rng_handle, DQN_CAST(unsigned char *)buffer, size, 0 /*flags*/);
if (gen_status != 0)
{
Dqn_Log_ErrorF("Failed to generate random bytes: %d", gen_status);
return false;
}
return true;
}
DQN_API Dqn_Str8 Dqn_OS_EXEPath(Dqn_Arena *arena)
{
Dqn_Str8 result = {};
if (!arena)
return result;
Dqn_Scratch scratch = Dqn_Scratch_Get(arena);
Dqn_Str16 exe_dir16 = Dqn_Win_EXEPathW(scratch.arena);
result = Dqn_Win_Str16ToStr8(arena, exe_dir16);
return result;
}
DQN_API void Dqn_OS_SleepMs(Dqn_uint milliseconds)
{
Sleep(milliseconds);
}
DQN_API uint64_t Dqn_OS_PerfCounterFrequency()
{
uint64_t result = g_dqn_library->win32_qpc_frequency.QuadPart;
DQN_ASSERTF(result, "Initialise the library with Dqn_Library_Init() to get a valid QPC frequency value");
return result;
}
DQN_API uint64_t Dqn_OS_PerfCounterNow()
{
LARGE_INTEGER integer = {};
QueryPerformanceCounter(&integer);
uint64_t result = integer.QuadPart;
return result;
}
#if !defined(DQN_NO_OS_FILE_API)
static uint64_t Dqn_Win_FileTimeToSeconds_(FILETIME const *time)
{
ULARGE_INTEGER time_large_int = {};
time_large_int.u.LowPart = time->dwLowDateTime;
time_large_int.u.HighPart = time->dwHighDateTime;
uint64_t result = (time_large_int.QuadPart / 10000000ULL) - 11644473600ULL;
return result;
}
DQN_API Dqn_OSPathInfo Dqn_OS_PathInfo(Dqn_Str8 path)
{
Dqn_OSPathInfo result = {};
if (!Dqn_Str8_HasData(path))
return result;
Dqn_Scratch scratch = Dqn_Scratch_Get(nullptr);
Dqn_Str16 path16 = Dqn_Win_Str8ToStr16(scratch.arena, path);
WIN32_FILE_ATTRIBUTE_DATA attrib_data = {};
if (!GetFileAttributesExW(path16.data, GetFileExInfoStandard, &attrib_data))
return result;
result.exists = true;
result.create_time_in_s = Dqn_Win_FileTimeToSeconds_(&attrib_data.ftCreationTime);
result.last_access_time_in_s = Dqn_Win_FileTimeToSeconds_(&attrib_data.ftLastAccessTime);
result.last_write_time_in_s = Dqn_Win_FileTimeToSeconds_(&attrib_data.ftLastWriteTime);
LARGE_INTEGER large_int = {};
large_int.u.HighPart = DQN_CAST(int32_t)attrib_data.nFileSizeHigh;
large_int.u.LowPart = attrib_data.nFileSizeLow;
result.size = (uint64_t)large_int.QuadPart;
if (attrib_data.dwFileAttributes != INVALID_FILE_ATTRIBUTES) {
if (attrib_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
result.type = Dqn_OSPathInfoType_Directory;
else
result.type = Dqn_OSPathInfoType_File;
}
return result;
}
DQN_API bool Dqn_OS_FileExists(Dqn_Str8 path)
{
bool result = false;
if (!Dqn_Str8_HasData(path))
return result;
Dqn_Scratch scratch = Dqn_Scratch_Get(nullptr);
Dqn_Str16 path16 = Dqn_Win_Str8ToStr16(scratch.arena, path);
if (path16.size) {
WIN32_FILE_ATTRIBUTE_DATA attrib_data = {};
if (GetFileAttributesExW(path16.data, GetFileExInfoStandard, &attrib_data)) {
result = (attrib_data.dwFileAttributes != INVALID_FILE_ATTRIBUTES) &&
!(attrib_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);
}
}
return result;
}
DQN_API bool Dqn_OS_FileCopy(Dqn_Str8 src, Dqn_Str8 dest, bool overwrite, Dqn_ErrorSink *error)
{
bool result = false;
Dqn_Scratch scratch = Dqn_Scratch_Get(nullptr);
Dqn_Str16 src16 = Dqn_Win_Str8ToStr16(scratch.arena, src);
Dqn_Str16 dest16 = Dqn_Win_Str8ToStr16(scratch.arena, dest);
int fail_if_exists = overwrite == false;
result = CopyFileW(src16.data, dest16.data, fail_if_exists) != 0;
if (!result) {
Dqn_WinError win_error = Dqn_Win_LastError(scratch.arena);
Dqn_ErrorSink_MakeF(error,
win_error.code,
"Failed to copy file '%.*s' to '%.*s': (%u) %.*s",
DQN_STR_FMT(src),
DQN_STR_FMT(dest),
win_error.code,
DQN_STR_FMT(win_error.msg));
}
return result;
}
DQN_API bool Dqn_OS_FileMove(Dqn_Str8 src, Dqn_Str8 dest, bool overwrite, Dqn_ErrorSink *error)
{
bool result = false;
Dqn_Scratch scratch = Dqn_Scratch_Get(nullptr);
Dqn_Str16 src16 = Dqn_Win_Str8ToStr16(scratch.arena, src);
Dqn_Str16 dest16 = Dqn_Win_Str8ToStr16(scratch.arena, dest);
unsigned long flags = MOVEFILE_COPY_ALLOWED;
if (overwrite) {
flags |= MOVEFILE_REPLACE_EXISTING;
}
result = MoveFileExW(src16.data, dest16.data, flags) != 0;
if (!result) {
Dqn_WinError win_error = Dqn_Win_LastError(scratch.arena);
Dqn_ErrorSink_MakeF(error,
win_error.code,
"Failed to move file '%.*s' to '%.*s': (%u) %.*s",
DQN_STR_FMT(src),
DQN_STR_FMT(dest),
win_error.code,
DQN_STR_FMT(win_error.msg));
}
return result;
}
DQN_API bool Dqn_OS_DirExists(Dqn_Str8 path)
{
bool result = false;
if (!Dqn_Str8_HasData(path))
return result;
Dqn_Scratch scratch = Dqn_Scratch_Get(nullptr);
Dqn_Str16 path16 = Dqn_Win_Str8ToStr16(scratch.arena, path);
if (path16.size) {
WIN32_FILE_ATTRIBUTE_DATA attrib_data = {};
if (GetFileAttributesExW(path16.data, GetFileExInfoStandard, &attrib_data)) {
result = (attrib_data.dwFileAttributes != INVALID_FILE_ATTRIBUTES) &&
(attrib_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);
}
}
return result;
}
DQN_API bool Dqn_OS_DirMake(Dqn_Str8 path)
{
bool result = true;
Dqn_Scratch scratch = Dqn_Scratch_Get(nullptr);
Dqn_Str16 path16 = Dqn_Win_Str8ToStr16(scratch.arena, path);
// NOTE: Go back from the end of the string to all the directories in the
// string, and try to create them. Since Win32 API cannot create
// intermediate directories that don't exist in a path we need to go back
// and record all the directories until we encounter one that exists.
//
// From that point onwards go forwards and make all the directories
// inbetween by null-terminating the string temporarily, creating the
// directory and so forth until we reach the end.
//
// If we find a file at some point in the path we fail out because the
// series of directories can not be made if a file exists with the same
// name.
for (Dqn_usize index = 0; index < path16.size; index++) {
bool first_char = index == (path16.size - 1);
wchar_t ch = path16.data[index];
if (ch == '/' || ch == '\\' || first_char) {
wchar_t temp = path16.data[index];
if (!first_char)
path16.data[index] = 0; // Temporarily null terminate it
WIN32_FILE_ATTRIBUTE_DATA attrib_data = {};
bool successful = GetFileAttributesExW(path16.data, GetFileExInfoStandard, &attrib_data); // Check
if (successful) {
if (attrib_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
// NOTE: The directory exists, continue iterating the path
} else {
// NOTE: There's some kind of file that exists at the path
// but it's not a directory. This request to make a
// directory is invalid.
return false;
}
} else {
// NOTE: There's nothing that exists at this path, we can create
// a directory here
result |= (CreateDirectoryW(path16.data, nullptr) == 0);
}
if (!first_char)
path16.data[index] = temp; // Undo null termination
}
}
return result;
}
DQN_API bool Dqn_OS_PathDelete(Dqn_Str8 path)
{
bool result = false;
if (!Dqn_Str8_HasData(path))
return result;
Dqn_Scratch scratch = Dqn_Scratch_Get(nullptr);
Dqn_Str16 path16 = Dqn_Win_Str8ToStr16(scratch.arena, path);
if (path16.size) {
result = DeleteFileW(path16.data);
if (!result)
result = RemoveDirectoryW(path16.data);
}
return result;
}
// NOTE: R/W Stream API ////////////////////////////////////////////////////////////////////////////
DQN_API Dqn_OSFile Dqn_OS_OpenFile(Dqn_Str8 path, Dqn_OSFileOpen open_mode, uint32_t access, Dqn_ErrorSink *error)
{
Dqn_OSFile result = {};
if (!Dqn_Str8_HasData(path) || path.size <= 0)
return result;
if ((access & ~Dqn_OSFileAccess_All) || ((access & Dqn_OSFileAccess_All) == 0)) {
DQN_INVALID_CODE_PATH;
return result;
}
unsigned long create_flag = 0;
switch (open_mode) {
case Dqn_OSFileOpen_CreateAlways: create_flag = CREATE_ALWAYS; break;
case Dqn_OSFileOpen_OpenIfExist: create_flag = OPEN_EXISTING; break;
case Dqn_OSFileOpen_OpenAlways: create_flag = OPEN_ALWAYS; break;
default: DQN_INVALID_CODE_PATH; return result;
}
unsigned long access_mode = 0;
if (access & Dqn_OSFileAccess_AppendOnly) {
DQN_ASSERTF((access & ~Dqn_OSFileAccess_AppendOnly) == 0,
"Append can only be applied exclusively to the file, other access modes not permitted");
access_mode = FILE_APPEND_DATA;
} else {
if (access & Dqn_OSFileAccess_Read)
access_mode |= GENERIC_READ;
if (access & Dqn_OSFileAccess_Write)
access_mode |= GENERIC_WRITE;
if (access & Dqn_OSFileAccess_Execute)
access_mode |= GENERIC_EXECUTE;
}
Dqn_Scratch scratch = Dqn_Scratch_Get(nullptr);
Dqn_Str16 path16 = Dqn_Win_Str8ToStr16(scratch.arena, path);
void *handle = CreateFileW(/*LPCWSTR lpFileName*/ path16.data,
/*DWORD dwDesiredAccess*/ access_mode,
/*DWORD dwShareMode*/ 0,
/*LPSECURITY_ATTRIBUTES lpSecurityAttributes*/ nullptr,
/*DWORD dwCreationDisposition*/ create_flag,
/*DWORD dwFlagsAndAttributes*/ FILE_ATTRIBUTE_NORMAL,
/*HANDLE hTemplateFile*/ nullptr);
if (handle == INVALID_HANDLE_VALUE) {
Dqn_WinError win_error = Dqn_Win_LastError(scratch.arena);
result.error = true;
Dqn_ErrorSink_MakeF(error, win_error.code, "Failed to open file at '%.*s': '%.*s'", DQN_STR_FMT(path), DQN_STR_FMT(win_error.msg));
return result;
}
result.handle = handle;
return result;
}
DQN_API bool Dqn_OS_WriteFileBuffer(Dqn_OSFile *file, void const *buffer, Dqn_usize size, Dqn_ErrorSink *error)
{
if (!file || !file->handle || file->error || !buffer || size <= 0)
return false;
bool result = true;
char const *end = DQN_CAST(char *) buffer + size;
for (char const *ptr = DQN_CAST(char const *) buffer; result && ptr != end;) {
unsigned long write_size = DQN_CAST(unsigned long)DQN_MIN((unsigned long)-1, end - ptr);
unsigned long bytes_written = 0;
result = WriteFile(file->handle, ptr, write_size, &bytes_written, nullptr /*lpOverlapped*/) != 0;
ptr += bytes_written;
}
if (!result) {
Dqn_Scratch scratch = Dqn_Scratch_Get(nullptr);
Dqn_WinError win_error = Dqn_Win_LastError(scratch.arena);
Dqn_Str8 buffer_size_str8 = Dqn_U64ToByteSizeStr8(scratch.arena, size, Dqn_U64ByteSizeType_Auto);
Dqn_ErrorSink_MakeF(error, win_error.code, "Failed to write buffer (%.*s) to file handle: %.*s", DQN_STR_FMT(buffer_size_str8), DQN_STR_FMT(win_error.msg));
}
return result;
}
DQN_API void Dqn_OS_CloseFile(Dqn_OSFile *file)
{
if (!file || !file->handle || file->error)
return;
CloseHandle(file->handle);
*file = {};
}
// NOTE: R/W Entire File ///////////////////////////////////////////////////////////////////////////
DQN_API Dqn_Str8 Dqn_OS_ReadAll(Dqn_Str8 path, Dqn_Arena *arena, Dqn_ErrorSink *error)
{
Dqn_Str8 result = {};
if (!arena)
return result;
Dqn_ArenaTempMemScope temp_mem = Dqn_ArenaTempMemScope(arena);
// NOTE: Convert to UTF16 //////////////////////////////////////////////////////////////////////
Dqn_Scratch scratch = Dqn_Scratch_Get(arena);
Dqn_Str16 path16 = Dqn_Win_Str8ToStr16(scratch.arena, path);
// NOTE: Get the file handle ///////////////////////////////////////////////////////////////////
void *file_handle = CreateFileW(/*LPCWSTR lpFileName*/ path16.data,
/*DWORD dwDesiredAccess*/ GENERIC_READ,
/*DWORD dwShareMode*/ FILE_SHARE_READ,
/*LPSECURITY_ATTRIBUTES lpSecurityAttributes*/ nullptr,
/*DWORD dwCreationDisposition*/ OPEN_EXISTING,
/*DWORD dwFlagsAndAttributes*/ FILE_ATTRIBUTE_READONLY,
/*HANDLE hTemplateFile*/ nullptr);
if (file_handle == INVALID_HANDLE_VALUE) {
Dqn_WinError win_error = Dqn_Win_LastError(scratch.arena);
Dqn_ErrorSink_MakeF(error, win_error.code, "Failed to open file at '%.*s' for reading: %.*s", DQN_STR_FMT(path), DQN_STR_FMT(win_error.msg));
return result;
}
DQN_DEFER { CloseHandle(file_handle); };
// NOTE: Query the file size ///////////////////////////////////////////////////////////////////
LARGE_INTEGER win_file_size;
if (!GetFileSizeEx(file_handle, &win_file_size)) {
Dqn_WinError win_error = Dqn_Win_LastError(scratch.arena);
Dqn_ErrorSink_MakeF(error, win_error.code, "Failed to query file size for reading '%.*s': %.*s", DQN_STR_FMT(path), DQN_STR_FMT(win_error.msg));
return result;
}
unsigned long const bytes_desired = DQN_CAST(unsigned long)win_file_size.QuadPart;
if (!DQN_CHECK(bytes_desired == win_file_size.QuadPart)) {
Dqn_ErrorSink_MakeF(error, 1 /*error_code*/, "Current implementation doesn't support reading >4GiB file at '%.*s', implement Win32 overlapped IO", DQN_STR_FMT(path));
return result;
}
// NOTE: Read the file from disk ///////////////////////////////////////////////////////////////
Dqn_Str8 buffer = Dqn_Str8_Alloc(arena, bytes_desired, Dqn_ZeroMem_No);
unsigned long bytes_read = 0;
unsigned long read_result = ReadFile(/*HANDLE hFile*/ file_handle,
/*LPVOID lpBuffer*/ buffer.data,
/*DWORD nNumberOfBytesToRead*/ bytes_desired,
/*LPDWORD lpNumberOfByesRead*/ &bytes_read,
/*LPOVERLAPPED lpOverlapped*/ nullptr);
if (read_result == 0) {
Dqn_WinError win_error = Dqn_Win_LastError(scratch.arena);
Dqn_ErrorSink_MakeF(error, win_error.code, "Failed to read bytes from file '%.*s': (%u) %.*s", DQN_STR_FMT(path), win_error.code, DQN_STR_FMT(win_error.msg));
return result;
}
if (bytes_read != bytes_desired) {
Dqn_WinError win_error = Dqn_Win_LastError(scratch.arena);
Dqn_ErrorSink_MakeF(
error,
win_error.code,
"Failed to read the desired number of bytes from file '%.*s', we read %uB but we expected %uB: (%u) %.*s",
DQN_STR_FMT(path),
bytes_read,
bytes_desired,
win_error.code,
DQN_STR_FMT(win_error.msg));
return result;
}
buffer.data[bytes_desired] = 0;
result = buffer;
temp_mem.mem = {};
return result;
}
#endif // !defined(DQN_NO_OS_FILE_API)
// NOTE: [$EXEC] Dqn_OSExec ////////////////////////////////////////////////////////////////////////
DQN_API void Dqn_OS_Exit(uint32_t exit_code)
{
ExitProcess(exit_code);
}
DQN_API Dqn_OSExecResult Dqn_OS_ExecWait(Dqn_OSExecAsyncHandle handle)
{
Dqn_OSExecResult result = {};
if (!handle.process || handle.os_error_code) {
result.os_error_code = handle.os_error_code;
return result;
}
if (handle.exit_code) {
result.exit_code = handle.exit_code;
return result;
}
DWORD exec_result = WaitForSingleObject(handle.process, INFINITE);
if (exec_result == WAIT_FAILED) {
result.os_error_code = GetLastError();
return result;
}
DWORD exit_status;
if (!GetExitCodeProcess(handle.process, &exit_status)) {
result.os_error_code = GetLastError();
return result;
}
result.exit_code = exit_status;
CloseHandle(handle.process);
return result;
}
DQN_API Dqn_OSExecAsyncHandle Dqn_OS_ExecAsync(Dqn_Slice<Dqn_Str8> cmd_line, Dqn_Str8 working_dir)
{
Dqn_OSExecAsyncHandle result = {};
if (cmd_line.size == 0)
return result;
Dqn_Scratch scratch = Dqn_Scratch_Get(nullptr);
Dqn_Str8 cmd_rendered = Dqn_Slice_Str8Render(scratch.arena, cmd_line, DQN_STR8(" "));
Dqn_Str16 cmd16 = Dqn_Win_Str8ToStr16(scratch.arena, cmd_rendered);
Dqn_Str16 working_dir16 = Dqn_Win_Str8ToStr16(scratch.arena, working_dir);
PROCESS_INFORMATION proc_info = {};
STARTUPINFOW startup_info = {};
startup_info.cb = sizeof(STARTUPINFOW);
startup_info.hStdError = GetStdHandle(STD_ERROR_HANDLE);
startup_info.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
startup_info.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
startup_info.dwFlags |= STARTF_USESTDHANDLES;
BOOL create_result = CreateProcessW(nullptr, cmd16.data, nullptr, nullptr, true, 0, nullptr, working_dir16.data, &startup_info, &proc_info);
if (!create_result) {
result.os_error_code = GetLastError();
return result;
}
CloseHandle(proc_info.hThread);
result.process = proc_info.hProcess;
return result;
}
#if !defined(DQN_NO_SEMAPHORE)
// NOTE: [$SEMA] Dqn_OSSemaphore ///////////////////////////////////////////////////////////////////
DQN_API Dqn_OSSemaphore Dqn_OS_SemaphoreInit(uint32_t initial_count)
{
Dqn_OSSemaphore result = {};
SECURITY_ATTRIBUTES security_attribs = {};
result.win32_handle = CreateSemaphoreA(&security_attribs, initial_count, INT32_MAX, nullptr /*name*/);
return result;
}
DQN_API bool Dqn_OS_SemaphoreIsValid(Dqn_OSSemaphore *semaphore)
{
bool result = false;
if (semaphore) {
result = semaphore->win32_handle;
}
return result;
}
DQN_API void Dqn_OS_SemaphoreDeinit(Dqn_OSSemaphore *semaphore)
{
if (!Dqn_OS_SemaphoreIsValid(semaphore))
return;
CloseHandle(semaphore->win32_handle);
*semaphore = {};
}
DQN_API void Dqn_OS_SemaphoreIncrement(Dqn_OSSemaphore *semaphore, uint32_t amount)
{
if (!Dqn_OS_SemaphoreIsValid(semaphore))
return;
LONG prev_count = 0;
ReleaseSemaphore(DQN_CAST(HANDLE *)semaphore->win32_handle, amount, &prev_count);
}
DQN_API Dqn_OSSemaphoreWaitResult Dqn_OS_SemaphoreWait(Dqn_OSSemaphore *semaphore, uint32_t timeout_ms)
{
Dqn_OSSemaphoreWaitResult result = {};
if (!Dqn_OS_SemaphoreIsValid(semaphore))
return result;
if (!semaphore->win32_handle)
return result;
DWORD wait_result = WaitForSingleObject(semaphore->win32_handle, timeout_ms == DQN_OS_SEMAPHORE_INFINITE_TIMEOUT ? INFINITE : timeout_ms);
if (wait_result == WAIT_TIMEOUT)
result = Dqn_OSSemaphoreWaitResult_Timeout;
else if (wait_result == WAIT_OBJECT_0)
result = Dqn_OSSemaphoreWaitResult_Success;
return result;
}
#endif // !defined(DQN_NO_SEMAPHORE)
#if !defined(DQN_NO_THREAD)
// NOTE: [$MUTX] Dqn_OSMutex ///////////////////////////////////////////////////////////////////////
DQN_API Dqn_OSMutex Dqn_OS_MutexInit()
{
Dqn_OSMutex result = {};
CRITICAL_SECTION crit_section = {};
InitializeCriticalSection(&crit_section);
static_assert(sizeof(CRITICAL_SECTION) <= sizeof(result.win32_handle), "Insufficient bytes to store Win32 mutex opaquely in our abstracted Dqn_OSMutex");
DQN_MEMCPY(result.win32_handle, &crit_section, sizeof(crit_section));
return result;
}
DQN_API void Dqn_OS_MutexDeinit(Dqn_OSMutex *mutex)
{
if (!mutex)
return;
CRITICAL_SECTION *crit_section = DQN_CAST(CRITICAL_SECTION *)mutex->win32_handle;
DeleteCriticalSection(crit_section);
DQN_MEMSET(mutex->win32_handle, 0, DQN_ARRAY_UCOUNT(mutex->win32_handle));
}
DQN_API void Dqn_OS_MutexLock(Dqn_OSMutex *mutex)
{
if (!mutex)
return;
CRITICAL_SECTION *crit_section = DQN_CAST(CRITICAL_SECTION *)mutex->win32_handle;
EnterCriticalSection(crit_section);
}
DQN_API void Dqn_OS_MutexUnlock(Dqn_OSMutex *mutex)
{
if (!mutex)
return;
CRITICAL_SECTION *crit_section = DQN_CAST(CRITICAL_SECTION *)mutex->win32_handle;
LeaveCriticalSection(crit_section);
}
// NOTE: [$THRD] Dqn_OSThread /////////////////////////////////////////////////////////////////////
static DWORD __stdcall Dqn_OS_ThreadFunc_(void *user_context)
{
Dqn_OSThread *thread = DQN_CAST(Dqn_OSThread *)user_context;
Dqn_OS_SemaphoreWait(&thread->init_semaphore, DQN_OS_SEMAPHORE_INFINITE_TIMEOUT);
thread->func(thread);
return 0;
}
DQN_API bool Dqn_OS_ThreadInit(Dqn_OSThread *thread, Dqn_OSThreadFunc *func, void *user_context)
{
bool result = false;
if (!thread)
return result;
thread->func = func;
thread->user_context = user_context;
thread->init_semaphore = Dqn_OS_SemaphoreInit(0 /*initial_count*/);
// TODO(doyle): Check if semaphore is valid
DWORD thread_id = 0;
SECURITY_ATTRIBUTES security_attribs = {};
thread->handle = CreateThread(&security_attribs,
0 /*stack_size*/,
Dqn_OS_ThreadFunc_,
thread,
0 /*creation_flags*/,
&thread_id);
result = thread->handle != INVALID_HANDLE_VALUE;
if (result) {
thread->thread_id = thread_id;
}
if (result) {
Dqn_OS_SemaphoreIncrement(&thread->init_semaphore, 1);
} else {
Dqn_OS_SemaphoreDeinit(&thread->init_semaphore);
*thread = {};
}
return result;
}
DQN_API void Dqn_OS_ThreadDeinit(Dqn_OSThread *thread)
{
if (!thread || !thread->handle)
return;
WaitForSingleObject(thread->handle, INFINITE);
CloseHandle(thread->handle);
thread->handle = INVALID_HANDLE_VALUE;
thread->thread_id = {};
}
DQN_API uint32_t Dqn_OS_ThreadID()
{
unsigned long result = GetCurrentThreadId();
return result;
}
#endif // !defined(DQN_NO_THREAD)
// NOTE: [$HTTP] Dqn_OSHttp ////////////////////////////////////////////////////////////////////////
void Dqn_OS_HttpRequestWin32Callback(HINTERNET session, DWORD *dwContext, DWORD dwInternetStatus, VOID *lpvStatusInformation, DWORD dwStatusInformationLength)
{
(void)session;
(void)dwStatusInformationLength;
Dqn_OSHttpResponse *response = DQN_CAST(Dqn_OSHttpResponse *)dwContext;
HINTERNET request = DQN_CAST(HINTERNET)response->win32_request_handle;
Dqn_WinError error = {};
DWORD const READ_BUFFER_SIZE = DQN_MEGABYTES(1);
if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_RESOLVING_NAME) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_NAME_RESOLVED) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_CONNECTING_TO_SERVER) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_CONNECTED_TO_SERVER) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_SENDING_REQUEST) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_REQUEST_SENT) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_RECEIVING_RESPONSE) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_RESPONSE_RECEIVED) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_CLOSING_CONNECTION) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_CONNECTION_CLOSED) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_CONNECTION_CLOSED) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_HANDLE_CREATED) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_HANDLE_CLOSING) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_DETECTING_PROXY) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_REDIRECT) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_INTERMEDIATE_RESPONSE) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_SECURE_FAILURE) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_HEADERS_AVAILABLE) {
DWORD status = 0;
DWORD status_size = sizeof(status_size);
if (WinHttpQueryHeaders(request,
WINHTTP_QUERY_STATUS_CODE | WINHTTP_QUERY_FLAG_NUMBER,
WINHTTP_HEADER_NAME_BY_INDEX,
&status,
&status_size,
WINHTTP_NO_HEADER_INDEX)) {
response->http_status = DQN_CAST(uint16_t)status;
// NOTE: You can normally call into WinHttpQueryDataAvailable which means the kernel
// will buffer the response into a single buffer and return us the full size of the
// request.
//
// or
//
// You may call WinHttpReadData directly to write the memory into our buffer directly.
// This is advantageous to avoid a copy from the kernel buffer into our buffer. If the
// end user application knows the typical payload size then they can optimise for this
// to prevent unnecessary allocation on the user side.
void *buffer = Dqn_Arena_Alloc(response->builder.arena, READ_BUFFER_SIZE, 1 /*align*/, Dqn_ZeroMem_No);
if (!WinHttpReadData(request, buffer, READ_BUFFER_SIZE, nullptr))
error = Dqn_Win_LastError(&response->tmp_arena);
} else {
error = Dqn_Win_LastError(&response->tmp_arena);
}
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_DATA_AVAILABLE) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_READ_COMPLETE) {
DWORD bytes_read = dwStatusInformationLength;
if (bytes_read) {
Dqn_Str8 prev_buffer = Dqn_Str8_Init(DQN_CAST(char *) lpvStatusInformation, bytes_read);
Dqn_Str8Builder_AppendRef(&response->builder, prev_buffer);
void *buffer = Dqn_Arena_Alloc(response->builder.arena, READ_BUFFER_SIZE, 1 /*align*/, Dqn_ZeroMem_No);
if (!WinHttpReadData(request, buffer, READ_BUFFER_SIZE, nullptr))
error = Dqn_Win_LastError(&response->tmp_arena);
}
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_WRITE_COMPLETE) {
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_REQUEST_ERROR) {
WINHTTP_ASYNC_RESULT *async_result = DQN_CAST(WINHTTP_ASYNC_RESULT *)lpvStatusInformation;
error = Dqn_Win_ErrorCodeToMsg(&response->tmp_arena, DQN_CAST(uint32_t)async_result->dwError);
} else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_SENDREQUEST_COMPLETE) {
if (!WinHttpReceiveResponse(request, 0))
error = Dqn_Win_LastError(&response->tmp_arena);
}
// NOTE: If the request handle is missing, then, the response has been freed.
// MSDN says that this callback can still be called after closing the handle
// and trigger the WINHTTP_CALLBACK_STATUS_REQUEST_ERROR.
if (response->win32_request_handle) {
bool read_complete = dwInternetStatus == WINHTTP_CALLBACK_STATUS_READ_COMPLETE && dwStatusInformationLength == 0;
if (read_complete) {
response->body = Dqn_Str8Builder_Build(&response->builder, response->arena);
}
if (read_complete || dwInternetStatus == WINHTTP_CALLBACK_STATUS_REQUEST_ERROR || error.code) {
Dqn_OS_SemaphoreIncrement(&response->on_complete_semaphore, 1);
Dqn_Atomic_AddU32(&response->done, 1);
}
if (error.code) {
response->error_code = error.code;
response->error_msg = error.msg;
}
}
}
DQN_API void Dqn_OS_HttpRequestAsync(Dqn_OSHttpResponse *response,
Dqn_Arena *arena,
Dqn_Str8 host,
Dqn_Str8 path,
Dqn_OSHttpRequestSecure secure,
Dqn_Str8 method,
Dqn_Str8 body,
Dqn_Str8 headers)
{
if (!response || !arena)
return;
response->arena = arena;
response->builder.arena = response->scratch_arena ? response->scratch_arena : &response->tmp_arena;
Dqn_Arena *scratch_arena = response->scratch_arena;
Dqn_Scratch scratch_ = Dqn_Scratch_Get(arena);
if (!scratch_arena) {
scratch_arena = scratch_.arena;
}
Dqn_WinError error = {};
DQN_DEFER {
response->error_msg = error.msg;
response->error_code = error.code;
if (error.code) {
// NOTE: 'Wait' handles failures gracefully, skipping the wait and
// cleans up the request
Dqn_OS_HttpRequestWait(response);
Dqn_Atomic_AddU32(&response->done, 1);
}
};
response->win32_request_session = WinHttpOpen(nullptr /*user agent*/, WINHTTP_ACCESS_TYPE_AUTOMATIC_PROXY, WINHTTP_NO_PROXY_NAME, WINHTTP_NO_PROXY_BYPASS, WINHTTP_FLAG_ASYNC);
if (!response->win32_request_session) {
error = Dqn_Win_LastError(&response->tmp_arena);
return;
}
DWORD callback_flags = WINHTTP_CALLBACK_STATUS_HEADERS_AVAILABLE |
WINHTTP_CALLBACK_STATUS_READ_COMPLETE |
WINHTTP_CALLBACK_STATUS_REQUEST_ERROR |
WINHTTP_CALLBACK_STATUS_SENDREQUEST_COMPLETE;
if (WinHttpSetStatusCallback(response->win32_request_session,
DQN_CAST(WINHTTP_STATUS_CALLBACK)Dqn_OS_HttpRequestWin32Callback,
callback_flags,
DQN_CAST(DWORD_PTR)nullptr /*dwReserved*/) == WINHTTP_INVALID_STATUS_CALLBACK) {
error = Dqn_Win_LastError(&response->tmp_arena);
return;
}
Dqn_Str16 host16 = Dqn_Win_Str8ToStr16(scratch_arena, host);
response->win32_request_connection = WinHttpConnect(response->win32_request_session, host16.data, secure ? INTERNET_DEFAULT_HTTPS_PORT : INTERNET_DEFAULT_HTTP_PORT, 0 /*reserved*/);
if (!response->win32_request_connection) {
error = Dqn_Win_LastError(&response->tmp_arena);
return;
}
Dqn_Str16 method16 = Dqn_Win_Str8ToStr16(scratch_arena, method);
Dqn_Str16 path16 = Dqn_Win_Str8ToStr16(scratch_arena, path);
response->win32_request_handle = WinHttpOpenRequest(response->win32_request_connection,
method16.data,
path16.data,
nullptr /*version*/,
nullptr /*referrer*/,
nullptr /*accept types*/,
secure ? WINHTTP_FLAG_SECURE : 0);
if (!response->win32_request_handle) {
error = Dqn_Win_LastError(&response->tmp_arena);
return;
}
Dqn_Str16 headers16 = Dqn_Win_Str8ToStr16(scratch_arena, headers);
response->on_complete_semaphore = Dqn_OS_SemaphoreInit(0);
if (!WinHttpSendRequest(response->win32_request_handle,
headers16.data,
DQN_CAST(DWORD)headers16.size,
body.data /*optional data*/,
DQN_CAST(DWORD) body.size /*optional length*/,
DQN_CAST(DWORD) body.size /*total content length*/,
DQN_CAST(DWORD_PTR)response)) {
error = Dqn_Win_LastError(&response->tmp_arena);
return;
}
}
DQN_API void Dqn_OS_HttpRequestFree(Dqn_OSHttpResponse *response)
{
// NOTE: Cleanup
// NOTE: These calls are synchronous even when the HTTP request is async.
WinHttpCloseHandle(response->win32_request_handle);
WinHttpCloseHandle(response->win32_request_connection);
WinHttpCloseHandle(response->win32_request_session);
response->win32_request_session = nullptr;
response->win32_request_connection = nullptr;
response->win32_request_handle = nullptr;
Dqn_Arena_Deinit(&response->tmp_arena);
if (Dqn_OS_SemaphoreIsValid(&response->on_complete_semaphore))
Dqn_OS_SemaphoreDeinit(&response->on_complete_semaphore);
*response = {};
}
// NOTE: [$WIND] Dqn_Win ///////////////////////////////////////////////////////////////////////////
DQN_API Dqn_WinError Dqn_Win_ErrorCodeToMsg(Dqn_Arena *arena, uint32_t error_code)
{
Dqn_WinError result = {};
result.code = error_code;
if (!arena)
return result;
DWORD flags = FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS;
void *module_to_get_errors_from = nullptr;
if (result.code >= 12000 && result.code <= 12175) {
flags |= FORMAT_MESSAGE_FROM_HMODULE;
module_to_get_errors_from = GetModuleHandleA("winhttp.dll");
}
wchar_t *error16 = nullptr;
DWORD size = FormatMessageW(/*DWORD dwFlags */ flags | FORMAT_MESSAGE_ALLOCATE_BUFFER,
/*LPCVOID lpSource */ module_to_get_errors_from,
/*DWORD dwMessageId */ result.code,
/*DWORD dwLanguageId*/ 0,
/*LPWSTR lpBuffer */ (LPWSTR)&error16,
/*DWORD nSize */ 0,
/*va_list *Arguments */ nullptr);
if (size)
result.msg = Dqn_Win_Str16ToStr8(arena, {error16, size});
if (error16)
LocalFree(error16);
return result;
}
DQN_API Dqn_WinError Dqn_Win_LastError(Dqn_Arena *arena)
{
Dqn_WinError result = Dqn_Win_ErrorCodeToMsg(arena, GetLastError());
return result;
}
DQN_API void Dqn_Win_MakeProcessDPIAware()
{
typedef bool SetProcessDpiAwareProc(void);
typedef bool SetProcessDpiAwarenessProc(DPI_AWARENESS);
typedef bool SetProcessDpiAwarenessContextProc(void * /*DPI_AWARENESS_CONTEXT*/);
// NOTE(doyle): Taken from cmuratori/refterm snippet on DPI awareness. It
// appears we can make this robust by just loading user32.dll and using
// GetProcAddress on the DPI function. If it's not there, we're on an old
// version of windows, so we can call an older version of the API.
void *lib_handle = LoadLibraryA("user32.dll");
if (!lib_handle)
return;
if (auto *set_process_dpi_awareness_context = DQN_CAST(SetProcessDpiAwarenessContextProc *)GetProcAddress(DQN_CAST(HMODULE)lib_handle, "SetProcessDpiAwarenessContext")) {
set_process_dpi_awareness_context(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
} else if (auto *set_process_dpi_awareness = DQN_CAST(SetProcessDpiAwarenessProc *)GetProcAddress(DQN_CAST(HMODULE)lib_handle, "SetProcessDpiAwareness")) {
set_process_dpi_awareness(DPI_AWARENESS_PER_MONITOR_AWARE);
} else if (auto *set_process_dpi_aware = DQN_CAST(SetProcessDpiAwareProc *)GetProcAddress(DQN_CAST(HMODULE)lib_handle, "SetProcessDpiAware")) {
set_process_dpi_aware();
}
}
// NOTE: Windows UTF8 to Str16 //////////////////////////////////////////////
DQN_API Dqn_Str16 Dqn_Win_Str8ToStr16(Dqn_Arena *arena, Dqn_Str8 src)
{
Dqn_Str16 result = {};
if (!arena || !Dqn_Str8_HasData(src))
return result;
int required_size = MultiByteToWideChar(CP_UTF8, 0 /*dwFlags*/, src.data, DQN_CAST(int)src.size, nullptr /*dest*/, 0 /*dest size*/);
if (required_size <= 0)
return result;
wchar_t *buffer = Dqn_Arena_NewArray(arena, wchar_t, required_size + 1, Dqn_ZeroMem_No);
if (!buffer)
return result;
int chars_written = MultiByteToWideChar(CP_UTF8, 0 /*dwFlags*/, src.data, DQN_CAST(int)src.size, buffer, required_size);
if (DQN_CHECK(chars_written == required_size)) {
result.data = buffer;
result.size = chars_written;
result.data[result.size] = 0;
}
return result;
}
DQN_API int Dqn_Win_Str8ToStr16Buffer(Dqn_Str8 src, wchar_t *dest, int dest_size)
{
int result = 0;
if (!Dqn_Str8_HasData(src))
return result;
result = MultiByteToWideChar(CP_UTF8, 0 /*dwFlags*/, src.data, DQN_CAST(int)src.size, nullptr /*dest*/, 0 /*dest size*/);
if (result <= 0 || result > dest_size || !dest)
return result;
result = MultiByteToWideChar(CP_UTF8, 0 /*dwFlags*/, src.data, DQN_CAST(int)src.size, dest, DQN_CAST(int)dest_size);
dest[DQN_MIN(result, dest_size - 1)] = 0;
return result;
}
// NOTE: Windows Str16 To UTF8 //////////////////////////////////////////////////////////////////
DQN_API int Dqn_Win_Str16ToStr8Buffer(Dqn_Str16 src, char *dest, int dest_size)
{
int result = 0;
if (!Dqn_Str16_HasData(src))
return result;
int src_size = Dqn_Safe_SaturateCastISizeToInt(src.size);
if (src_size <= 0)
return result;
result = WideCharToMultiByte(CP_UTF8, 0 /*dwFlags*/, src.data, src_size, nullptr /*dest*/, 0 /*dest size*/, nullptr, nullptr);
if (result <= 0 || result > dest_size || !dest)
return result;
result = WideCharToMultiByte(CP_UTF8, 0 /*dwFlags*/, src.data, src_size, dest, DQN_CAST(int)dest_size, nullptr, nullptr);
dest[DQN_MIN(result, dest_size - 1)] = 0;
return result;
}
DQN_API Dqn_Str8 Dqn_Win_Str16ToStr8(Dqn_Arena *arena, Dqn_Str16 src)
{
Dqn_Str8 result = {};
if (!arena || !Dqn_Str16_HasData(src))
return result;
int src_size = Dqn_Safe_SaturateCastISizeToInt(src.size);
if (src_size <= 0)
return result;
int required_size = WideCharToMultiByte(CP_UTF8, 0 /*dwFlags*/, src.data, src_size, nullptr /*dest*/, 0 /*dest size*/, nullptr, nullptr);
if (required_size <= 0)
return result;
// NOTE: Str8 allocate ensures there's one extra byte for
// null-termination already so no-need to +1 the required size
Dqn_ArenaTempMemScope temp_mem = Dqn_ArenaTempMemScope(arena);
Dqn_Str8 buffer = Dqn_Str8_Alloc(arena, required_size, Dqn_ZeroMem_No);
if (!Dqn_Str8_HasData(buffer))
return result;
int chars_written = WideCharToMultiByte(CP_UTF8, 0 /*dwFlags*/, src.data, src_size, buffer.data, DQN_CAST(int)buffer.size, nullptr, nullptr);
if (DQN_CHECK(chars_written == required_size)) {
result = buffer;
result.data[result.size] = 0;
temp_mem.mem = {};
}
return result;
}
// NOTE: Windows Executable Directory //////////////////////////////////////////
DQN_API Dqn_Str16 Dqn_Win_EXEPathW(Dqn_Arena *arena)
{
Dqn_Scratch scratch = Dqn_Scratch_Get(arena);
Dqn_Str16 result = {};
Dqn_usize module_size = 0;
wchar_t *module_path = nullptr;
do {
module_size += 256;
module_path = Dqn_Arena_NewArray(scratch.arena, wchar_t, module_size, Dqn_ZeroMem_No);
if (!module_path)
return result;
module_size = DQN_CAST(Dqn_usize)GetModuleFileNameW(nullptr /*module*/, module_path, DQN_CAST(int)module_size);
} while (GetLastError() == ERROR_INSUFFICIENT_BUFFER);
Dqn_usize index_of_last_slash = 0;
for (Dqn_usize index = module_size - 1; !index_of_last_slash && index < module_size; index--)
index_of_last_slash = module_path[index] == '\\' ? index : 0;
result.data = Dqn_Arena_NewArray(arena, wchar_t, module_size + 1, Dqn_ZeroMem_No);
result.size = module_size;
DQN_MEMCPY(result.data, module_path, sizeof(wchar_t) * result.size);
result.data[result.size] = 0;
return result;
}
DQN_API Dqn_Str16 Dqn_Win_EXEDirW(Dqn_Arena *arena)
{
// TODO(doyle): Implement a Dqn_Str16_BinarySearchReverse
Dqn_Scratch scratch = Dqn_Scratch_Get(arena);
Dqn_Str16 result = {};
Dqn_usize module_size = 0;
wchar_t *module_path = nullptr;
do {
module_size += 256;
module_path = Dqn_Arena_NewArray(scratch.arena, wchar_t, module_size, Dqn_ZeroMem_No);
if (!module_path)
return result;
module_size = DQN_CAST(Dqn_usize)GetModuleFileNameW(nullptr /*module*/, module_path, DQN_CAST(int)module_size);
} while (GetLastError() == ERROR_INSUFFICIENT_BUFFER);
Dqn_usize index_of_last_slash = 0;
for (Dqn_usize index = module_size - 1; !index_of_last_slash && index < module_size; index--)
index_of_last_slash = module_path[index] == '\\' ? index : 0;
result.data = Dqn_Arena_NewArray(arena, wchar_t, index_of_last_slash + 1, Dqn_ZeroMem_No);
result.size = index_of_last_slash;
DQN_MEMCPY(result.data, module_path, sizeof(wchar_t) * result.size);
result.data[result.size] = 0;
return result;
}
DQN_API Dqn_Str8 Dqn_Win_WorkingDir(Dqn_Arena *arena, Dqn_Str8 suffix)
{
Dqn_Scratch scratch = Dqn_Scratch_Get(arena);
Dqn_Str16 suffix16 = Dqn_Win_Str8ToStr16(scratch.arena, suffix);
Dqn_Str16 dir16 = Dqn_Win_WorkingDirW(scratch.arena, suffix16);
Dqn_Str8 result = Dqn_Win_Str16ToStr8(arena, dir16);
return result;
}
DQN_API Dqn_Str16 Dqn_Win_WorkingDirW(Dqn_Arena *arena, Dqn_Str16 suffix)
{
DQN_ASSERT(suffix.size >= 0);
Dqn_Str16 result = {};
// NOTE: required_size is the size required *including* the null-terminator
Dqn_Scratch scratch = Dqn_Scratch_Get(arena);
unsigned long required_size = GetCurrentDirectoryW(0, nullptr);
unsigned long desired_size = required_size + DQN_CAST(unsigned long) suffix.size;
wchar_t *scratch_w_path = Dqn_Arena_NewArray(scratch.arena, wchar_t, desired_size, Dqn_ZeroMem_No);
if (!scratch_w_path)
return result;
unsigned long bytes_written_wo_null_terminator = GetCurrentDirectoryW(desired_size, scratch_w_path);
if ((bytes_written_wo_null_terminator + 1) != required_size) {
// TODO(dqn): Error
return result;
}
wchar_t *w_path = Dqn_Arena_NewArray(arena, wchar_t, desired_size, Dqn_ZeroMem_No);
if (!w_path)
return result;
if (suffix.size) {
DQN_MEMCPY(w_path, scratch_w_path, sizeof(*scratch_w_path) * bytes_written_wo_null_terminator);
DQN_MEMCPY(w_path + bytes_written_wo_null_terminator, suffix.data, sizeof(suffix.data[0]) * suffix.size);
w_path[desired_size] = 0;
}
result = Dqn_Str16{w_path, DQN_CAST(Dqn_usize)(desired_size - 1)};
return result;
}
DQN_API bool Dqn_Win_FolderWIterate(Dqn_Str16 path, Dqn_Win_FolderIteratorW *it)
{
WIN32_FIND_DATAW find_data = {};
if (it->handle) {
if (FindNextFileW(it->handle, &find_data) == 0)
return false;
} else {
it->handle = FindFirstFileExW(path.data, /*LPCWSTR lpFileName,*/
FindExInfoStandard, /*FINDEX_INFO_LEVELS fInfoLevelId,*/
&find_data, /*LPVOID lpFindFileData,*/
FindExSearchNameMatch, /*FINDEX_SEARCH_OPS fSearchOp,*/
nullptr, /*LPVOID lpSearchFilter,*/
FIND_FIRST_EX_LARGE_FETCH /*unsigned long dwAdditionalFlags)*/);
if (it->handle == INVALID_HANDLE_VALUE)
return false;
}
it->file_name_buf[0] = 0;
it->file_name = Dqn_Str16{it->file_name_buf, 0};
do {
if (find_data.cFileName[0] == '.' || (find_data.cFileName[0] == '.' && find_data.cFileName[1] == '.'))
continue;
it->file_name.size = Dqn_CStr16_Size(find_data.cFileName);
DQN_ASSERT(it->file_name.size < (DQN_ARRAY_UCOUNT(it->file_name_buf) - 1));
DQN_MEMCPY(it->file_name.data, find_data.cFileName, it->file_name.size * sizeof(wchar_t));
it->file_name_buf[it->file_name.size] = 0;
break;
} while (FindNextFileW(it->handle, &find_data) != 0);
return it->file_name.size > 0;
}
DQN_API bool Dqn_Win_FolderIterate(Dqn_Str8 path, Dqn_Win_FolderIterator *it)
{
if (!Dqn_Str8_HasData(path) || !it || path.size <= 0)
return false;
Dqn_Scratch scratch = Dqn_Scratch_Get(nullptr);
Dqn_Win_FolderIteratorW wide_it = {};
Dqn_Str16 path16 = {};
if (it->handle) {
wide_it.handle = it->handle;
} else {
bool needs_asterisks = Dqn_Str8_EndsWith(path, DQN_STR8("\\")) ||
Dqn_Str8_EndsWith(path, DQN_STR8("/"));
bool has_glob = Dqn_Str8_EndsWith(path, DQN_STR8("\\*")) ||
Dqn_Str8_EndsWith(path, DQN_STR8("/*"));
Dqn_Str8 adjusted_path = path;
if (!has_glob) {
// NOTE: We are missing the glob for enumerating the files, we will
// add those characters in this branch, so overwrite the null
// character, add the glob and re-null terminate the buffer.
if (needs_asterisks)
adjusted_path = Dqn_OS_PathConvertF(scratch.arena, "%.*s*", DQN_STR_FMT(path));
else
adjusted_path = Dqn_OS_PathConvertF(scratch.arena, "%.*s/*", DQN_STR_FMT(path));
}
path16 = Dqn_Win_Str8ToStr16(scratch.arena, adjusted_path);
if (path16.size <= 0) // Conversion error
return false;
}
bool result = Dqn_Win_FolderWIterate(path16, &wide_it);
it->handle = wide_it.handle;
if (result) {
int size = Dqn_Win_Str16ToStr8Buffer(wide_it.file_name, it->file_name_buf, DQN_ARRAY_UCOUNT(it->file_name_buf));
it->file_name = Dqn_Str8_Init(it->file_name_buf, size);
}
return result;
}
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