Handle multibyte paths on Windows

Author: lxbndr

src/io.c

@@ -447,10 +447,17 @@ dispatch_io_create_with_path(dispatch_io_type_t type, const char *path,
 	_dispatch_retain(channel);
 	dispatch_async(channel->queue, ^{
 		int err = 0;
+#if defined(_WIN32)
+		struct _stat st;
+		int wide_len = MultiByteToWideChar(CP_UTF8, 0, path, -1, NULL, 0);
+		WCHAR *wide_path = malloc(wide_len * sizeof(WCHAR));
+		MultiByteToWideChar(CP_UTF8, 0, path, -1, wide_path, wide_len);
+#else
 		struct stat st;
+#endif
 		_dispatch_io_syscall_switch_noerr(err,
 #if defined(_WIN32)
-			stat(path_data->path, &st),
+			_wstat(wide_path, &st),
 #else
 			(path_data->oflag & O_NOFOLLOW) == O_NOFOLLOW
 #if __APPLE__
@@ -476,7 +483,11 @@ dispatch_io_create_with_path(dispatch_io_type_t type, const char *path,
 					*c = 0;
 					int perr;
 					_dispatch_io_syscall_switch_noerr(perr,
+#if defined(_WIN32)
+						_wstat(wide_path, &st),
+#else
 						stat(path_data->path, &st),
+#endif
 						case 0:
 							// Since the parent directory exists, open() will
 							// create a regular file after the fd_entry has
@@ -493,6 +504,9 @@ dispatch_io_create_with_path(dispatch_io_type_t type, const char *path,
 				}
 				break;
 		);
+#if defined(_WIN32)
+		free(wide_path);
+#endif
 		channel->err = err;
 		if (err) {
 			free(path_data);
@@ -1333,9 +1347,14 @@ _dispatch_fd_entry_guarded_open(dispatch_fd_entry_t fd_entry, const char *path,
 	} else if (oflag & _O_TRUNC) {
 		dwCreationDisposition = TRUNCATE_EXISTING;
 	}
-	return (dispatch_fd_t)CreateFile(path, dwDesiredAccess,
+	int wide_len = MultiByteToWideChar(CP_UTF8, 0, path, -1, NULL, 0);
+	WCHAR *wide_path = malloc(wide_len * sizeof(WCHAR));
+	MultiByteToWideChar(CP_UTF8, 0, path, -1, wide_path, wide_len);
+	dispatch_fd_t fd = (dispatch_fd_t)CreateFileW(wide_path, dwDesiredAccess,
 			FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
 			dwCreationDisposition, 0, NULL);
+	free(wide_path);
+	return fd;
 #else
 	return open(path, oflag, mode);
 #endif