module os #flag -lws2_32 #include pub const ( path_separator = '\\' ) // Ref - https://docs.microsoft.com/en-us/windows/desktop/winprog/windows-data-types // A handle to an object. type HANDLE voidptr // win: FILETIME // https://docs.microsoft.com/en-us/windows/win32/api/minwinbase/ns-minwinbase-filetime struct Filetime { dwLowDateTime u32 dwHighDateTime u32 } // win: WIN32_FIND_DATA // https://docs.microsoft.com/en-us/windows/win32/api/minwinbase/ns-minwinbase-_win32_find_dataw struct Win32finddata { mut: dwFileAttributes u32 ftCreationTime Filetime ftLastAccessTime Filetime ftLastWriteTime Filetime nFileSizeHigh u32 nFileSizeLow u32 dwReserved0 u32 dwReserved1 u32 cFileName [260]u16 // MAX_PATH = 260 cAlternateFileName [14]u16 // 14 dwFileType u32 dwCreatorType u32 wFinderFlags u16 } fn init_os_args(argc int, argv &byteptr) []string { mut args := []string mut args_list := &voidptr(0) mut args_count := 0 args_list = C.CommandLineToArgvW(C.GetCommandLine(), &args_count) for i := 0; i < args_count; i++ { args << string_from_wide(&u16(args_list[i])) } C.LocalFree(args_list) return args } pub fn ls(path string) ?[]string { mut find_file_data := Win32finddata{} mut dir_files := []string // We can also check if the handle is valid. but using dir_exists instead // h_find_dir := C.FindFirstFile(path.str, &find_file_data) // if (INVALID_HANDLE_VALUE == h_find_dir) { // return dir_files // } // C.FindClose(h_find_dir) if !dir_exists(path) { return error('ls() couldnt open dir "$path"') } // NOTE: Should eventually have path struct & os dependant path seperator (eg os.PATH_SEPERATOR) // we need to add files to path eg. c:\windows\*.dll or :\windows\* path_files := '$path\\*' // NOTE:TODO: once we have a way to convert utf16 wide character to utf8 // we should use FindFirstFileW and FindNextFileW h_find_files := C.FindFirstFile(path_files.to_wide(), &find_file_data) first_filename := string_from_wide(&u16(find_file_data.cFileName)) if first_filename != '.' && first_filename != '..' { dir_files << first_filename } for C.FindNextFile(h_find_files, &find_file_data) { filename := string_from_wide(&u16(find_file_data.cFileName)) if filename != '.' && filename != '..' { dir_files << filename.clone() } } C.FindClose(h_find_files) return dir_files } pub fn dir_exists(path string) bool { _path := path.replace('/', '\\') attr := int(C.GetFileAttributes(_path.to_wide())) if attr == C.INVALID_FILE_ATTRIBUTES { return false } if (attr & C.FILE_ATTRIBUTE_DIRECTORY) != 0 { return true } return false } // mkdir creates a new directory with the specified path. pub fn mkdir(path string) { _path := path.replace('/', '\\') // Windows doesnt recursively create the folders // so we need to help it out here if _path.last_index('\\') != -1 { mkdir(_path.all_before_last('\\')) } C.CreateDirectory(_path.to_wide(), 0) } // Ref - https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/get-osfhandle?view=vs-2019 // get_file_handle retrieves the operating-system file handle that is associated with the specified file descriptor. pub fn get_file_handle(path string) HANDLE { mode := 'rb' _fd := C._wfopen(path.to_wide(), mode.to_wide()) if _fd == 0 { return HANDLE(INVALID_HANDLE_VALUE) } _handle := C._get_osfhandle(C._fileno(_fd)) // CreateFile? - hah, no -_- return _handle } // Ref - https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-getmodulefilenamea // get_module_filename retrieves the fully qualified path for the file that contains the specified module. // The module must have been loaded by the current process. pub fn get_module_filename(handle HANDLE) ?string { mut sz := int(4096) // Optimized length mut buf := &u16(malloc(4096)) for { status := C.GetModuleFileName(handle, &buf, sz) switch status { case SUCCESS: _filename := string_from_wide2(buf, sz) return _filename default: // Must handled with GetLastError and converted by FormatMessage return error('Cannot get file name from handle') } } panic('this should be unreachable') // TODO remove unreachable after loop } // Ref - https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-formatmessagea#parameters const ( FORMAT_MESSAGE_ALLOCATE_BUFFER = 0x00000100 FORMAT_MESSAGE_ARGUMENT_ARRAY = 0x00002000 FORMAT_MESSAGE_FROM_HMODULE = 0x00000800 FORMAT_MESSAGE_FROM_STRING = 0x00000400 FORMAT_MESSAGE_FROM_SYSTEM = 0x00001000 FORMAT_MESSAGE_IGNORE_INSERTS = 0x00000200 ) // Ref - winnt.h const ( SUBLANG_NEUTRAL = 0x00 SUBLANG_DEFAULT = 0x01 LANG_NEUTRAL = (SUBLANG_NEUTRAL) ) // Ref - https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes--12000-15999- const ( MAX_ERROR_CODE = 15841 // ERROR_API_UNAVAILABLE ) // ptr_win_get_error_msg return string (voidptr) // representation of error, only for windows. fn ptr_win_get_error_msg(code u32) voidptr { mut buf := voidptr(0) // Check for code overflow if code > u32(MAX_ERROR_CODE) { return buf } C.FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, 0, code, C.MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), &buf, 0, 0) return buf } // get_error_msg return error code representation in string. pub fn get_error_msg(code int) string { if code < 0 { // skip negative return '' } _ptr_text := ptr_win_get_error_msg(u32(code)) if _ptr_text == 0 { // compare with null return '' } return string_from_wide(_ptr_text) }