mirror of https://github.com/flysand7/ciabatta.git
94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
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// See src/tinyrt.h file for the interface this file implements
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static _RT_Status _rt_file_std_handles_init() {
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_rt_file_stdin.handle = GetStdHandle(STD_INPUT_HANDLE);
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_rt_file_stdin.flags = _RT_FILE_READ;
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_rt_file_stdout.handle = GetStdHandle(STD_OUTPUT_HANDLE);
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_rt_file_stdout.flags = _RT_FILE_WRITE;
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_rt_file_stderr.handle = GetStdHandle(STD_ERROR_HANDLE);
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_rt_file_stdout.flags = _RT_FILE_WRITE;
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return _RT_STATUS_OK;
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}
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static _RT_Status _rt_file_open(_RT_File *file, char const *name, int _rt_flags) {
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u32 access = 0;
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if(_rt_flags & _RT_FILE_READ) access |= GENERIC_READ;
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if(_rt_flags & _RT_FILE_WRITE) access |= GENERIC_WRITE;
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u32 share = 0;
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if((_rt_flags & _RT_FILE_READ) == 0) share |= FILE_SHARE_READ;
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u32 creation = 0;
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if(_rt_flags & _RT_FILE_TRUNCATE) {
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creation = TRUNCATE_EXISTING;
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}
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else if(_rt_flags & _RT_FILE_CREATE) {
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if(_rt_flags & _RT_FILE_EXCLUSIVE) creation = CREATE_ALWAYS;
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else creation = CREATE_NEW;
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}
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else {
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if(_rt_flags & _RT_FILE_EXCLUSIVE) creation = OPEN_ALWAYS;
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else creation = OPEN_EXISTING;
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}
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HANDLE handle = CreateFileA(name, access, share, NULL, creation, FILE_ATTRIBUTE_NORMAL, NULL);
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if(file == INVALID_HANDLE_VALUE) {
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// ERROR_FILE_NOT_FOUND
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// ERROR_PATH_NOT_FOUND
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// ERROR_ACCESS_DENIED
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// ERROR_NOT_ENOUGH_MEMORY
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return _RT_STATUS_FILE_IO_ERROR;
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}
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file->handle = handle;
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file->flags = _rt_flags;
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return _RT_STATUS_OK;
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}
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static _RT_Status _rt_file_read(u64 size, void *buffer, _RT_File *from, u64 *out_bytes_read) {
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*out_bytes_read = 0;
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BOOL ok = ReadFile(from->handle, buffer, size, (unsigned long *)out_bytes_read, NULL);
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if(!ok) {
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return _RT_STATUS_FILE_IO_ERROR;
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}
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return _RT_STATUS_OK;
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}
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static _RT_Status _rt_file_write(_RT_File *to, u64 size, void *buffer, u64 *out_bytes_written) {
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*out_bytes_written = 0;
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BOOL ok = WriteFile(to->handle, buffer, size, (unsigned long *)out_bytes_written, NULL);
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if(!ok) {
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return _RT_STATUS_FILE_IO_ERROR;
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}
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return _RT_STATUS_OK;
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}
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static _RT_Status _rt_file_close(_RT_File *file) {
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BOOL ok = CloseHandle(file->handle);
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if(!ok) {
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return _RT_STATUS_FILE_BAD_FILE;
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}
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return _RT_STATUS_OK;
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}
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[[noreturn]] static void _rt_program_exit(int code) {
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ExitProcess(code);
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__builtin_unreachable();
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}
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static _RT_Status _rt_mem_alloc(void *optional_desired_addr, u64 min_size, void **out_addr) {
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void *addr = VirtualAlloc(optional_desired_addr, min_size, MEM_COMMIT|MEM_RESERVE, PAGE_READWRITE);
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*out_addr = addr;
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if(addr == NULL) {
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return _RT_ERROR_GENERIC;
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}
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return _RT_STATUS_OK;
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}
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static _RT_Status _rt_mem_free(void *addr) {
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BOOL ok = VirtualFree(addr, 0, MEM_RELEASE);
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if(!ok) {
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return _RT_ERROR_GENERIC;
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}
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return _RT_STATUS_OK;
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}
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