1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GLib Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GLib at ftp://ftp.gtk.org/pub/gtk/.
27 #ifndef __G_IOCHANNEL_H__
28 #define __G_IOCHANNEL_H__
37 typedef struct _GIOChannel GIOChannel;
38 typedef struct _GIOFuncs GIOFuncs;
54 G_IO_IN GLIB_SYSDEF_POLLIN,
55 G_IO_OUT GLIB_SYSDEF_POLLOUT,
56 G_IO_PRI GLIB_SYSDEF_POLLPRI,
57 G_IO_ERR GLIB_SYSDEF_POLLERR,
58 G_IO_HUP GLIB_SYSDEF_POLLHUP,
59 G_IO_NVAL GLIB_SYSDEF_POLLNVAL
69 typedef gboolean (*GIOFunc) (GIOChannel *source,
70 GIOCondition condition,
74 GIOError (*io_read) (GIOChannel *channel,
78 GIOError (*io_write) (GIOChannel *channel,
81 guint *bytes_written);
82 GIOError (*io_seek) (GIOChannel *channel,
85 void (*io_close) (GIOChannel *channel);
86 guint (*io_add_watch) (GIOChannel *channel,
88 GIOCondition condition,
91 GDestroyNotify notify);
92 void (*io_free) (GIOChannel *channel);
95 void g_io_channel_init (GIOChannel *channel);
96 void g_io_channel_ref (GIOChannel *channel);
97 void g_io_channel_unref (GIOChannel *channel);
98 GIOError g_io_channel_read (GIOChannel *channel,
102 GIOError g_io_channel_write (GIOChannel *channel,
105 guint *bytes_written);
106 GIOError g_io_channel_seek (GIOChannel *channel,
109 void g_io_channel_close (GIOChannel *channel);
110 guint g_io_add_watch_full (GIOChannel *channel,
112 GIOCondition condition,
115 GDestroyNotify notify);
116 guint g_io_add_watch (GIOChannel *channel,
117 GIOCondition condition,
121 /* On Unix, IO channels created with this function for any file
122 * descriptor or socket.
124 * On Win32, use this only for files opened with the MSVCRT (the
125 * Microsoft run-time C library) _open() or _pipe, including file
126 * descriptors 0, 1 and 2 (corresponding to stdin, stdout and stderr).
128 * The term file descriptor as used in the context of Win32 refers to
129 * the emulated Unix-like file descriptors MSVCRT provides. The native
130 * corresponding concept is file HANDLE. There isn't as of yet a way to
131 * get GIOChannels for file HANDLEs.
133 GIOChannel* g_io_channel_unix_new (int fd);
134 gint g_io_channel_unix_get_fd (GIOChannel *channel);
138 #define G_WIN32_MSG_HANDLE 19981206
140 /* Use this to get a GPollFD from a GIOChannel, so that you can call
141 * g_io_channel_win32_poll(). After calling this you should only use
142 * g_io_channel_read() to read from the GIOChannel, i.e. never read()
143 * or recv() from the underlying file descriptor or SOCKET.
145 void g_io_channel_win32_make_pollfd (GIOChannel *channel,
146 GIOCondition condition,
149 /* This can be used to wait a until at least one of the channels is readable.
150 * On Unix you would do a select() on the file descriptors of the channels.
151 * This should probably be available for all platforms?
153 gint g_io_channel_win32_poll (GPollFD *fds,
157 /* This is used to add polling for Windows messages. GDK (GTk+) programs
158 * should *not* use this.
160 void g_main_poll_win32_msg_add (gint priority,
164 /* An IO channel for Windows messages for window handle hwnd. */
165 GIOChannel *g_io_channel_win32_new_messages (guint hwnd);
167 /* An IO channel for C runtime (emulated Unix-like) file
168 * descriptors. Identical to g_io_channel_unix_new above.
169 * After calling g_io_add_watch() on a IO channel returned
170 * by this function, you shouldn't call read() on the file
173 GIOChannel* g_io_channel_win32_new_fd (int fd);
175 /* Get the C runtime file descriptor of a channel. */
176 gint g_io_channel_win32_get_fd (GIOChannel *channel);
178 /* An IO channel for a SOCK_STREAM winsock socket. The parameter
179 * should be a SOCKET. After calling g_io_add_watch() on a IO channel
180 * returned by this function, you shouldn't call recv() on the SOCKET.
182 GIOChannel *g_io_channel_win32_new_stream_socket (int socket);
186 /* Windows emulation stubs for common Unix functions
189 # define MAXPATHLEN 1024
196 * To get prototypes for the following POSIXish functions, you have to
197 * include the indicated non-POSIX headers. The functions are defined
198 * in OLDNAMES.LIB (MSVC) or -lmoldname-msvc (mingw32).
200 * getcwd: <direct.h> (MSVC), <io.h> (mingw32)
201 * getpid: <process.h>
203 * unlink: <stdio.h> or <io.h>
204 * open, read, write, lseek, close: <io.h>
209 /* pipe is not in OLDNAMES.LIB or -lmoldname-msvc. */
210 #define pipe(phandles) _pipe (phandles, 4096, _O_BINARY)
212 /* For some POSIX functions that are not provided by the MS runtime,
213 * we provide emulators in glib, which are prefixed with g_win32_.
215 # define ftruncate(fd, size) g_win32_ftruncate (fd, size)
217 /* -lmingw32 also has emulations for these, but we need our own
218 * for MSVC anyhow, so we might aswell use them always.
220 # define opendir g_win32_opendir
221 # define readdir g_win32_readdir
222 # define rewinddir g_win32_rewinddir
223 # define closedir g_win32_closedir
224 # define NAME_MAX 255
228 gchar d_name[NAME_MAX + 1];
234 gboolean just_opened;
235 guint find_file_handle;
236 gpointer find_file_data;
237 struct dirent readdir_result;
239 typedef struct DIR DIR;
241 /* emulation functions */
242 extern int g_win32_ftruncate (gint f,
244 DIR* g_win32_opendir (const gchar *dirname);
245 struct dirent* g_win32_readdir (DIR *dir);
246 void g_win32_rewinddir (DIR *dir);
247 gint g_win32_closedir (DIR *dir);
249 /* The MS setlocale uses locale names of the form "English_United
250 * States.1252" etc. We want the Unixish standard form "en", "zh_TW"
251 * etc. This function gets the current thread locale from Windows and
252 * returns it as a string of the above form for use in forming file
253 * names etc. The returned string should be deallocated with g_free().
255 gchar * g_win32_getlocale (void);
257 /* Translate a Win32 error code (as returned by GetLastError()) into
258 * the corresponding message. The returned string should be deallocated
261 gchar * g_win32_error_message (gint error);
263 #endif /* G_OS_WIN32 */
267 #endif /* __G_IOCHANNEL_H__ */