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 #include <glib/gmain.h>
31 #include <glib/gtypes.h>
32 #include <glib/gstring.h>
39 typedef struct _GIOChannel GIOChannel;
40 typedef struct _GIOFuncs GIOFuncs;
50 #define G_IO_CHANNEL_ERROR g_channel_error_quark()
54 /* Derived from errno */
55 G_IO_CHANNEL_ERROR_ACCES,
56 G_IO_CHANNEL_ERROR_BADF,
57 G_IO_CHANNEL_ERROR_DEADLK,
58 G_IO_CHANNEL_ERROR_FAULT,
59 G_IO_CHANNEL_ERROR_INVAL,
60 G_IO_CHANNEL_ERROR_IO,
61 G_IO_CHANNEL_ERROR_ISDIR,
62 G_IO_CHANNEL_ERROR_MFILE,
63 G_IO_CHANNEL_ERROR_NOLCK,
64 G_IO_CHANNEL_ERROR_NOSPC,
65 G_IO_CHANNEL_ERROR_PERM,
66 G_IO_CHANNEL_ERROR_PIPE,
67 G_IO_CHANNEL_ERROR_SPIPE,
69 G_IO_CHANNEL_ERROR_ENCODE_RW,
70 G_IO_CHANNEL_ERROR_FAILED
78 G_IO_STATUS_PARTIAL_CHARS, /* like EOF, but with unconverted data left */
91 G_IO_IN GLIB_SYSDEF_POLLIN,
92 G_IO_OUT GLIB_SYSDEF_POLLOUT,
93 G_IO_PRI GLIB_SYSDEF_POLLPRI,
94 G_IO_ERR GLIB_SYSDEF_POLLERR,
95 G_IO_HUP GLIB_SYSDEF_POLLHUP,
96 G_IO_NVAL GLIB_SYSDEF_POLLNVAL
99 #define G_IO_CHANNEL_UNIX_LINE_TERM "\n"
100 #define G_IO_CHANNEL_DOS_LINE_TERM "\r\n"
101 #define G_IO_CHANNEL_MACINTOSH_LINE_TERM "\r"
102 #define G_IO_CHANNEL_ENCODE_RAW "GIOChannelEncodeRaw"
106 G_IO_FLAG_APPEND = 1 << 0,
107 G_IO_FLAG_NONBLOCK = 1 << 1,
108 G_IO_FLAG_IS_READABLE = 1 << 2, /* Read only flag */
109 G_IO_FLAG_IS_WRITEABLE = 1 << 3, /* Read only flag */
110 G_IO_FLAG_IS_SEEKABLE = 1 << 4, /* Read only flag */
111 G_IO_FLAG_MASK = (1 << 5) - 1,
112 G_IO_FLAG_GET_MASK = G_IO_FLAG_MASK,
113 G_IO_FLAG_SET_MASK = G_IO_FLAG_APPEND | G_IO_FLAG_NONBLOCK,
119 G_IO_FILE_MODE_WRITE,
120 G_IO_FILE_MODE_APPEND,
121 G_IO_FILE_MODE_READ_WRITE,
122 G_IO_FILE_MODE_READ_WRITE_TRUNCATE,
123 G_IO_FILE_MODE_READ_WRITE_APPEND,
139 GString *encoded_read_buf;
142 /* Group the flags together to save memory */
144 gboolean use_buffer : 1;
145 gboolean do_encode : 1;
146 gboolean ready_to_read : 1;
147 gboolean ready_to_write : 1;
148 gboolean close_on_unref : 1;
149 gboolean seekable_cached : 1;
150 gboolean is_seekable : 1;
153 typedef gboolean (*GIOFunc) (GIOChannel *source,
154 GIOCondition condition,
158 GIOStatus (*io_read) (GIOChannel *channel,
163 GIOStatus (*io_write) (GIOChannel *channel,
166 gsize *bytes_written,
168 GIOStatus (*io_seek) (GIOChannel *channel,
172 GIOStatus (*io_close) (GIOChannel *channel,
174 GSource* (*io_create_watch) (GIOChannel *channel,
175 GIOCondition condition);
176 void (*io_free) (GIOChannel *channel);
177 GIOStatus (*io_set_flags) (GIOChannel *channel,
180 GIOFlags (*io_get_flags) (GIOChannel *channel);
183 void g_io_channel_init (GIOChannel *channel);
184 void g_io_channel_ref (GIOChannel *channel);
185 void g_io_channel_unref (GIOChannel *channel);
187 #ifndef G_DISABLE_DEPRECATED
188 GIOError g_io_channel_read (GIOChannel *channel,
192 GIOError g_io_channel_write (GIOChannel *channel,
195 gsize *bytes_written);
196 GIOError g_io_channel_seek (GIOChannel *channel,
199 void g_io_channel_close (GIOChannel *channel);
200 #endif /* G_DISABLE_DEPRECATED */
202 GIOStatus g_io_channel_shutdown (GIOChannel *channel,
205 guint g_io_add_watch_full (GIOChannel *channel,
207 GIOCondition condition,
210 GDestroyNotify notify);
211 GSource * g_io_create_watch (GIOChannel *channel,
212 GIOCondition condition);
213 guint g_io_add_watch (GIOChannel *channel,
214 GIOCondition condition,
218 /* character encoding conversion involved functions.
221 void g_io_channel_set_buffer_size (GIOChannel *channel,
223 gsize g_io_channel_get_buffer_size (GIOChannel *channel);
224 GIOCondition g_io_channel_get_buffer_condition (GIOChannel *channel);
225 GIOStatus g_io_channel_set_flags (GIOChannel *channel,
228 GIOFlags g_io_channel_get_flags (GIOChannel *channel);
229 void g_io_channel_set_line_term (GIOChannel *channel,
230 const gchar *line_term);
231 G_CONST_RETURN gchar* g_io_channel_get_line_term (GIOChannel *channel);
232 GIOStatus g_io_channel_set_encoding (GIOChannel *channel,
233 const gchar *encoding,
235 G_CONST_RETURN gchar* g_io_channel_get_encoding (GIOChannel *channel);
238 GIOStatus g_io_channel_flush (GIOChannel *channel,
240 GIOStatus g_io_channel_read_line (GIOChannel *channel,
243 gsize *terminator_pos,
245 GIOStatus g_io_channel_read_line_string (GIOChannel *channel,
247 gsize *terminator_pos,
249 GIOStatus g_io_channel_read_to_end (GIOChannel *channel,
253 GIOStatus g_io_channel_read_chars (GIOChannel *channel,
258 GIOStatus g_io_channel_write_chars (GIOChannel *channel,
261 gsize *bytes_written,
263 GIOStatus g_io_channel_seek_position (GIOChannel *channel,
267 GIOChannel* g_io_channel_new_file (const gchar *filename,
273 GQuark g_channel_error_quark (void);
274 GIOChannelError g_channel_error_from_errno (gint en);
276 /* On Unix, IO channels created with this function for any file
277 * descriptor or socket.
279 * On Win32, this can be used either for files opened with the MSVCRT
280 * (the Microsoft run-time C library) _open() or _pipe, including file
281 * descriptors 0, 1 and 2 (corresponding to stdin, stdout and stderr),
282 * or for Winsock SOCKETs. If the parameter is a legal file
283 * descriptor, it is assumed to be such, otherwise it should be a
284 * SOCKET. This relies on SOCKETs and file descriptors not
285 * overlapping. If you want to be certain, call either
286 * g_io_channel_win32_new_fd() or g_io_channel_win32_new_socket()
287 * instead as appropriate.
289 * The term file descriptor as used in the context of Win32 refers to
290 * the emulated Unix-like file descriptors MSVCRT provides. The native
291 * corresponding concept is file HANDLE. There isn't as of yet a way to
292 * get GIOChannels for Win32 file HANDLEs.
294 GIOChannel* g_io_channel_unix_new (int fd);
295 gint g_io_channel_unix_get_fd (GIOChannel *channel);
299 #define G_WIN32_MSG_HANDLE 19981206
301 /* Use this to get a GPollFD from a GIOChannel, so that you can call
302 * g_io_channel_win32_poll(). After calling this you should only use
303 * g_io_channel_read() to read from the GIOChannel, i.e. never read()
304 * from the underlying file descriptor. For SOCKETs, it is possible to call
307 void g_io_channel_win32_make_pollfd (GIOChannel *channel,
308 GIOCondition condition,
311 /* This can be used to wait a until at least one of the channels is readable.
312 * On Unix you would do a select() on the file descriptors of the channels.
314 gint g_io_channel_win32_poll (GPollFD *fds,
318 /* This is used to add polling for Windows messages. GDK (GTk+) programs
319 * should *not* use this.
321 void g_main_poll_win32_msg_add (gint priority,
325 /* Create an IO channel for Windows messages for window handle hwnd. */
326 GIOChannel *g_io_channel_win32_new_messages (guint hwnd);
328 /* Create an IO channel for C runtime (emulated Unix-like) file
329 * descriptors. After calling g_io_add_watch() on a IO channel
330 * returned by this function, you shouldn't call read() on the file
331 * descriptor. This is because adding polling for a file descriptor is
332 * implemented on Win32 by starting a thread that sits blocked in a
333 * read() from the file descriptor most of the time. All reads from
334 * the file descriptor should be done by this internal GLib
335 * thread. Your code should call only g_io_channel_read().
337 GIOChannel* g_io_channel_win32_new_fd (gint fd);
339 /* Get the C runtime file descriptor of a channel. */
340 gint g_io_channel_win32_get_fd (GIOChannel *channel);
342 /* Create an IO channel for a winsock socket. The parameter should be
343 * a SOCKET. Contrary to IO channels for file descriptors (on *Win32),
344 * you can use normal recv() or recvfrom() on sockets even if GLib
347 GIOChannel *g_io_channel_win32_new_socket (gint socket);
353 #endif /* __G_IOCHANNEL_H__ */