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__
30 #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
31 #error "Only <glib.h> can be included directly."
34 #include <glib/gconvert.h>
35 #include <glib/gmain.h>
36 #include <glib/gstring.h>
43 typedef struct _GIOChannel GIOChannel;
44 typedef struct _GIOFuncs GIOFuncs;
54 #define G_IO_CHANNEL_ERROR g_io_channel_error_quark()
58 /* Derived from errno */
59 G_IO_CHANNEL_ERROR_FBIG,
60 G_IO_CHANNEL_ERROR_INVAL,
61 G_IO_CHANNEL_ERROR_IO,
62 G_IO_CHANNEL_ERROR_ISDIR,
63 G_IO_CHANNEL_ERROR_NOSPC,
64 G_IO_CHANNEL_ERROR_NXIO,
65 G_IO_CHANNEL_ERROR_OVERFLOW,
66 G_IO_CHANNEL_ERROR_PIPE,
68 G_IO_CHANNEL_ERROR_FAILED
88 G_IO_FLAG_APPEND = 1 << 0,
89 G_IO_FLAG_NONBLOCK = 1 << 1,
90 G_IO_FLAG_IS_READABLE = 1 << 2, /* Read only flag */
91 G_IO_FLAG_IS_WRITABLE = 1 << 3, /* Read only flag */
92 G_IO_FLAG_IS_WRITEABLE = 1 << 3, /* Misspelling in 2.29.10 and earlier */
93 G_IO_FLAG_IS_SEEKABLE = 1 << 4, /* Read only flag */
94 G_IO_FLAG_MASK = (1 << 5) - 1,
95 G_IO_FLAG_GET_MASK = G_IO_FLAG_MASK,
96 G_IO_FLAG_SET_MASK = G_IO_FLAG_APPEND | G_IO_FLAG_NONBLOCK
108 gchar *line_term; /* String which indicates the end of a line of text */
109 guint line_term_len; /* So we can have null in the line term */
112 GString *read_buf; /* Raw data from the channel */
113 GString *encoded_read_buf; /* Channel data converted to UTF-8 */
114 GString *write_buf; /* Data ready to be written to the file */
115 gchar partial_write_buf[6]; /* UTF-8 partial characters, null terminated */
117 /* Group the flags together, immediately after partial_write_buf, to save memory */
119 guint use_buffer : 1; /* The encoding uses the buffers */
120 guint do_encode : 1; /* The encoding uses the GIConv coverters */
121 guint close_on_unref : 1; /* Close the channel on final unref */
122 guint is_readable : 1; /* Cached GIOFlag */
123 guint is_writeable : 1; /* ditto */
124 guint is_seekable : 1; /* ditto */
130 typedef gboolean (*GIOFunc) (GIOChannel *source,
131 GIOCondition condition,
135 GIOStatus (*io_read) (GIOChannel *channel,
140 GIOStatus (*io_write) (GIOChannel *channel,
143 gsize *bytes_written,
145 GIOStatus (*io_seek) (GIOChannel *channel,
149 GIOStatus (*io_close) (GIOChannel *channel,
151 GSource* (*io_create_watch) (GIOChannel *channel,
152 GIOCondition condition);
153 void (*io_free) (GIOChannel *channel);
154 GIOStatus (*io_set_flags) (GIOChannel *channel,
157 GIOFlags (*io_get_flags) (GIOChannel *channel);
160 GLIB_AVAILABLE_IN_ALL
161 void g_io_channel_init (GIOChannel *channel);
162 GLIB_AVAILABLE_IN_ALL
163 GIOChannel *g_io_channel_ref (GIOChannel *channel);
164 GLIB_AVAILABLE_IN_ALL
165 void g_io_channel_unref (GIOChannel *channel);
167 GLIB_DEPRECATED_FOR(g_io_channel_read_chars)
168 GIOError g_io_channel_read (GIOChannel *channel,
173 GLIB_DEPRECATED_FOR(g_io_channel_write_chars)
174 GIOError g_io_channel_write (GIOChannel *channel,
177 gsize *bytes_written);
179 GLIB_DEPRECATED_FOR(g_io_channel_seek_position)
180 GIOError g_io_channel_seek (GIOChannel *channel,
184 GLIB_DEPRECATED_FOR(g_io_channel_shutdown)
185 void g_io_channel_close (GIOChannel *channel);
187 GLIB_AVAILABLE_IN_ALL
188 GIOStatus g_io_channel_shutdown (GIOChannel *channel,
191 GLIB_AVAILABLE_IN_ALL
192 guint g_io_add_watch_full (GIOChannel *channel,
194 GIOCondition condition,
197 GDestroyNotify notify);
198 GLIB_AVAILABLE_IN_ALL
199 GSource * g_io_create_watch (GIOChannel *channel,
200 GIOCondition condition);
201 GLIB_AVAILABLE_IN_ALL
202 guint g_io_add_watch (GIOChannel *channel,
203 GIOCondition condition,
207 /* character encoding conversion involved functions.
210 GLIB_AVAILABLE_IN_ALL
211 void g_io_channel_set_buffer_size (GIOChannel *channel,
213 GLIB_AVAILABLE_IN_ALL
214 gsize g_io_channel_get_buffer_size (GIOChannel *channel);
215 GLIB_AVAILABLE_IN_ALL
216 GIOCondition g_io_channel_get_buffer_condition (GIOChannel *channel);
217 GLIB_AVAILABLE_IN_ALL
218 GIOStatus g_io_channel_set_flags (GIOChannel *channel,
221 GLIB_AVAILABLE_IN_ALL
222 GIOFlags g_io_channel_get_flags (GIOChannel *channel);
223 GLIB_AVAILABLE_IN_ALL
224 void g_io_channel_set_line_term (GIOChannel *channel,
225 const gchar *line_term,
227 GLIB_AVAILABLE_IN_ALL
228 const gchar * g_io_channel_get_line_term (GIOChannel *channel,
230 GLIB_AVAILABLE_IN_ALL
231 void g_io_channel_set_buffered (GIOChannel *channel,
233 GLIB_AVAILABLE_IN_ALL
234 gboolean g_io_channel_get_buffered (GIOChannel *channel);
235 GLIB_AVAILABLE_IN_ALL
236 GIOStatus g_io_channel_set_encoding (GIOChannel *channel,
237 const gchar *encoding,
239 GLIB_AVAILABLE_IN_ALL
240 const gchar * g_io_channel_get_encoding (GIOChannel *channel);
241 GLIB_AVAILABLE_IN_ALL
242 void g_io_channel_set_close_on_unref (GIOChannel *channel,
244 GLIB_AVAILABLE_IN_ALL
245 gboolean g_io_channel_get_close_on_unref (GIOChannel *channel);
248 GLIB_AVAILABLE_IN_ALL
249 GIOStatus g_io_channel_flush (GIOChannel *channel,
251 GLIB_AVAILABLE_IN_ALL
252 GIOStatus g_io_channel_read_line (GIOChannel *channel,
255 gsize *terminator_pos,
257 GLIB_AVAILABLE_IN_ALL
258 GIOStatus g_io_channel_read_line_string (GIOChannel *channel,
260 gsize *terminator_pos,
262 GLIB_AVAILABLE_IN_ALL
263 GIOStatus g_io_channel_read_to_end (GIOChannel *channel,
267 GLIB_AVAILABLE_IN_ALL
268 GIOStatus g_io_channel_read_chars (GIOChannel *channel,
273 GLIB_AVAILABLE_IN_ALL
274 GIOStatus g_io_channel_read_unichar (GIOChannel *channel,
277 GLIB_AVAILABLE_IN_ALL
278 GIOStatus g_io_channel_write_chars (GIOChannel *channel,
281 gsize *bytes_written,
283 GLIB_AVAILABLE_IN_ALL
284 GIOStatus g_io_channel_write_unichar (GIOChannel *channel,
287 GLIB_AVAILABLE_IN_ALL
288 GIOStatus g_io_channel_seek_position (GIOChannel *channel,
292 GLIB_AVAILABLE_IN_ALL
293 GIOChannel* g_io_channel_new_file (const gchar *filename,
299 GLIB_AVAILABLE_IN_ALL
300 GQuark g_io_channel_error_quark (void);
301 GLIB_AVAILABLE_IN_ALL
302 GIOChannelError g_io_channel_error_from_errno (gint en);
304 /* On Unix, IO channels created with this function for any file
305 * descriptor or socket.
307 * On Win32, this can be used either for files opened with the MSVCRT
308 * (the Microsoft run-time C library) _open() or _pipe, including file
309 * descriptors 0, 1 and 2 (corresponding to stdin, stdout and stderr),
310 * or for Winsock SOCKETs. If the parameter is a legal file
311 * descriptor, it is assumed to be such, otherwise it should be a
312 * SOCKET. This relies on SOCKETs and file descriptors not
313 * overlapping. If you want to be certain, call either
314 * g_io_channel_win32_new_fd() or g_io_channel_win32_new_socket()
315 * instead as appropriate.
317 * The term file descriptor as used in the context of Win32 refers to
318 * the emulated Unix-like file descriptors MSVCRT provides. The native
319 * corresponding concept is file HANDLE. There isn't as of yet a way to
320 * get GIOChannels for Win32 file HANDLEs.
322 GLIB_AVAILABLE_IN_ALL
323 GIOChannel* g_io_channel_unix_new (int fd);
324 GLIB_AVAILABLE_IN_ALL
325 gint g_io_channel_unix_get_fd (GIOChannel *channel);
328 /* Hook for GClosure / GSource integration. Don't touch */
329 GLIB_VAR GSourceFuncs g_io_watch_funcs;
333 /* You can use this "pseudo file descriptor" in a GPollFD to add
334 * polling for Windows messages. GTK applications should not do that.
337 #define G_WIN32_MSG_HANDLE 19981206
339 /* Use this to get a GPollFD from a GIOChannel, so that you can call
340 * g_io_channel_win32_poll(). After calling this you should only use
341 * g_io_channel_read() to read from the GIOChannel, i.e. never read()
342 * from the underlying file descriptor. For SOCKETs, it is possible to call
345 GLIB_AVAILABLE_IN_ALL
346 void g_io_channel_win32_make_pollfd (GIOChannel *channel,
347 GIOCondition condition,
350 /* This can be used to wait a until at least one of the channels is readable.
351 * On Unix you would do a select() on the file descriptors of the channels.
353 GLIB_AVAILABLE_IN_ALL
354 gint g_io_channel_win32_poll (GPollFD *fds,
358 /* Create an IO channel for Windows messages for window handle hwnd. */
359 #if GLIB_SIZEOF_VOID_P == 8
360 /* We use gsize here so that it is still an integer type and not a
361 * pointer, like the guint in the traditional prototype. We can't use
362 * intptr_t as that is not portable enough.
364 GLIB_AVAILABLE_IN_ALL
365 GIOChannel *g_io_channel_win32_new_messages (gsize hwnd);
367 GLIB_AVAILABLE_IN_ALL
368 GIOChannel *g_io_channel_win32_new_messages (guint hwnd);
371 /* Create an IO channel for C runtime (emulated Unix-like) file
372 * descriptors. After calling g_io_add_watch() on a IO channel
373 * returned by this function, you shouldn't call read() on the file
374 * descriptor. This is because adding polling for a file descriptor is
375 * implemented on Win32 by starting a thread that sits blocked in a
376 * read() from the file descriptor most of the time. All reads from
377 * the file descriptor should be done by this internal GLib
378 * thread. Your code should call only g_io_channel_read_chars().
380 GLIB_AVAILABLE_IN_ALL
381 GIOChannel* g_io_channel_win32_new_fd (gint fd);
383 /* Get the C runtime file descriptor of a channel. */
384 GLIB_AVAILABLE_IN_ALL
385 gint g_io_channel_win32_get_fd (GIOChannel *channel);
387 /* Create an IO channel for a winsock socket. The parameter should be
388 * a SOCKET. Contrary to IO channels for file descriptors (on *Win32),
389 * you can use normal recv() or recvfrom() on sockets even if GLib
392 GLIB_AVAILABLE_IN_ALL
393 GIOChannel *g_io_channel_win32_new_socket (gint socket);
395 GLIB_DEPRECATED_FOR(g_io_channel_win32_new_socket)
396 GIOChannel *g_io_channel_win32_new_stream_socket (gint socket);
398 GLIB_AVAILABLE_IN_ALL
399 void g_io_channel_win32_set_debug (GIOChannel *channel,
405 #define g_io_channel_new_file g_io_channel_new_file_utf8
407 GLIB_AVAILABLE_IN_ALL
408 GIOChannel *g_io_channel_new_file_utf8 (const gchar *filename,
415 #endif /* __G_IOCHANNEL_H__ */