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190 lines
5.6 KiB
V
190 lines
5.6 KiB
V
module os
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#flag -lws2_32
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#include <winsock2.h>
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pub const (
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path_separator = '\\'
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)
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// Ref - https://docs.microsoft.com/en-us/windows/desktop/winprog/windows-data-types
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// A handle to an object.
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type HANDLE voidptr
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// win: FILETIME
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// https://docs.microsoft.com/en-us/windows/win32/api/minwinbase/ns-minwinbase-filetime
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struct Filetime {
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dwLowDateTime u32
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dwHighDateTime u32
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}
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// win: WIN32_FIND_DATA
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// https://docs.microsoft.com/en-us/windows/win32/api/minwinbase/ns-minwinbase-_win32_find_dataw
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struct Win32finddata {
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mut:
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dwFileAttributes u32
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ftCreationTime Filetime
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ftLastAccessTime Filetime
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ftLastWriteTime Filetime
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nFileSizeHigh u32
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nFileSizeLow u32
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dwReserved0 u32
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dwReserved1 u32
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cFileName [260]u16 // MAX_PATH = 260
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cAlternateFileName [14]u16 // 14
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dwFileType u32
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dwCreatorType u32
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wFinderFlags u16
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}
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fn init_os_args(argc int, argv &byteptr) []string {
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mut args := []string
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mut args_list := &voidptr(0)
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mut args_count := 0
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args_list = C.CommandLineToArgvW(C.GetCommandLine(), &args_count)
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for i := 0; i < args_count; i++ {
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args << string_from_wide(&u16(args_list[i]))
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}
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C.LocalFree(args_list)
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return args
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}
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pub fn ls(path string) ?[]string {
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mut find_file_data := Win32finddata{}
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mut dir_files := []string
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// We can also check if the handle is valid. but using dir_exists instead
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// h_find_dir := C.FindFirstFile(path.str, &find_file_data)
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// if (INVALID_HANDLE_VALUE == h_find_dir) {
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// return dir_files
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// }
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// C.FindClose(h_find_dir)
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if !dir_exists(path) {
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return error('ls() couldnt open dir "$path"')
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}
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// NOTE: Should eventually have path struct & os dependant path seperator (eg os.PATH_SEPERATOR)
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// we need to add files to path eg. c:\windows\*.dll or :\windows\*
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path_files := '$path\\*'
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// NOTE:TODO: once we have a way to convert utf16 wide character to utf8
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// we should use FindFirstFileW and FindNextFileW
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h_find_files := C.FindFirstFile(path_files.to_wide(), &find_file_data)
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first_filename := string_from_wide(&u16(find_file_data.cFileName))
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if first_filename != '.' && first_filename != '..' {
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dir_files << first_filename
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}
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for C.FindNextFile(h_find_files, &find_file_data) {
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filename := string_from_wide(&u16(find_file_data.cFileName))
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if filename != '.' && filename != '..' {
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dir_files << filename.clone()
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}
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}
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C.FindClose(h_find_files)
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return dir_files
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}
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pub fn dir_exists(path string) bool {
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_path := path.replace('/', '\\')
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attr := int(C.GetFileAttributes(_path.to_wide()))
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if attr == C.INVALID_FILE_ATTRIBUTES {
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return false
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}
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if (attr & C.FILE_ATTRIBUTE_DIRECTORY) != 0 {
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return true
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}
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return false
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}
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// mkdir creates a new directory with the specified path.
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pub fn mkdir(path string) {
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_path := path.replace('/', '\\')
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// Windows doesnt recursively create the folders
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// so we need to help it out here
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if _path.last_index('\\') != -1 {
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mkdir(_path.all_before_last('\\'))
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}
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C.CreateDirectory(_path.to_wide(), 0)
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}
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// Ref - https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/get-osfhandle?view=vs-2019
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// get_file_handle retrieves the operating-system file handle that is associated with the specified file descriptor.
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pub fn get_file_handle(path string) HANDLE {
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mode := 'rb'
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_fd := C._wfopen(path.to_wide(), mode.to_wide())
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if _fd == 0 {
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return HANDLE(INVALID_HANDLE_VALUE)
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}
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_handle := C._get_osfhandle(C._fileno(_fd)) // CreateFile? - hah, no -_-
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return _handle
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}
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// Ref - https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-getmodulefilenamea
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// get_module_filename retrieves the fully qualified path for the file that contains the specified module.
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// The module must have been loaded by the current process.
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pub fn get_module_filename(handle HANDLE) ?string {
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mut sz := int(4096) // Optimized length
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mut buf := &u16(malloc(4096))
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for {
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status := C.GetModuleFileName(handle, &buf, sz)
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switch status {
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case SUCCESS:
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_filename := string_from_wide2(buf, sz)
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return _filename
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default:
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// Must handled with GetLastError and converted by FormatMessage
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return error('Cannot get file name from handle')
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}
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}
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panic('this should be unreachable') // TODO remove unreachable after loop
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}
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// Ref - https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-formatmessagea#parameters
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const (
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FORMAT_MESSAGE_ALLOCATE_BUFFER = 0x00000100
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FORMAT_MESSAGE_ARGUMENT_ARRAY = 0x00002000
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FORMAT_MESSAGE_FROM_HMODULE = 0x00000800
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FORMAT_MESSAGE_FROM_STRING = 0x00000400
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FORMAT_MESSAGE_FROM_SYSTEM = 0x00001000
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FORMAT_MESSAGE_IGNORE_INSERTS = 0x00000200
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)
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// Ref - winnt.h
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const (
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SUBLANG_NEUTRAL = 0x00
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SUBLANG_DEFAULT = 0x01
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LANG_NEUTRAL = (SUBLANG_NEUTRAL)
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)
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// Ref - https://docs.microsoft.com/en-us/windows/win32/debug/system-error-codes--12000-15999-
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const (
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MAX_ERROR_CODE = 15841 // ERROR_API_UNAVAILABLE
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)
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// ptr_win_get_error_msg return string (voidptr)
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// representation of error, only for windows.
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fn ptr_win_get_error_msg(code u32) voidptr {
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mut buf := voidptr(0)
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// Check for code overflow
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if code > u32(MAX_ERROR_CODE) {
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return buf
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}
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C.FormatMessage(
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FORMAT_MESSAGE_ALLOCATE_BUFFER
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| FORMAT_MESSAGE_FROM_SYSTEM
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| FORMAT_MESSAGE_IGNORE_INSERTS,
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0, code, C.MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), &buf, 0, 0)
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return buf
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}
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// get_error_msg return error code representation in string.
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pub fn get_error_msg(code int) string {
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if code < 0 { // skip negative
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return ''
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}
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_ptr_text := ptr_win_get_error_msg(u32(code))
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if _ptr_text == 0 { // compare with null
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return ''
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}
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return string_from_wide(_ptr_text)
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}
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