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Edit File: giochannel.h

/* GLIB - Library of useful routines for C programming * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see <http://www.gnu.org/licenses/>. */ /* * Modified by the GLib Team and others 1997-2000. See the AUTHORS * file for a list of people on the GLib Team. See the ChangeLog * files for a list of changes. These files are distributed with * GLib at ftp://ftp.gtk.org/pub/gtk/. */ #ifndef __G_IOCHANNEL_H__ #define __G_IOCHANNEL_H__ #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION) #error "Only <glib.h> can be included directly." #endif #include <glib/gconvert.h> #include <glib/gmain.h> #include <glib/gstring.h> G_BEGIN_DECLS /* GIOChannel */ typedef struct _GIOChannel GIOChannel; typedef struct _GIOFuncs GIOFuncs; typedef enum { G_IO_ERROR_NONE, G_IO_ERROR_AGAIN, G_IO_ERROR_INVAL, G_IO_ERROR_UNKNOWN } GIOError; #define G_IO_CHANNEL_ERROR g_io_channel_error_quark() typedef enum { /* Derived from errno */ G_IO_CHANNEL_ERROR_FBIG, G_IO_CHANNEL_ERROR_INVAL, G_IO_CHANNEL_ERROR_IO, G_IO_CHANNEL_ERROR_ISDIR, G_IO_CHANNEL_ERROR_NOSPC, G_IO_CHANNEL_ERROR_NXIO, G_IO_CHANNEL_ERROR_OVERFLOW, G_IO_CHANNEL_ERROR_PIPE, /* Other */ G_IO_CHANNEL_ERROR_FAILED } GIOChannelError; typedef enum { G_IO_STATUS_ERROR, G_IO_STATUS_NORMAL, G_IO_STATUS_EOF, G_IO_STATUS_AGAIN } GIOStatus; typedef enum { G_SEEK_CUR, G_SEEK_SET, G_SEEK_END } GSeekType; typedef enum { G_IO_FLAG_APPEND = 1 << 0, G_IO_FLAG_NONBLOCK = 1 << 1, G_IO_FLAG_IS_READABLE = 1 << 2, /* Read only flag */ G_IO_FLAG_IS_WRITABLE = 1 << 3, /* Read only flag */ G_IO_FLAG_IS_WRITEABLE = 1 << 3, /* Misspelling in 2.29.10 and earlier */ G_IO_FLAG_IS_SEEKABLE = 1 << 4, /* Read only flag */ G_IO_FLAG_MASK = (1 << 5) - 1, G_IO_FLAG_GET_MASK = G_IO_FLAG_MASK, G_IO_FLAG_SET_MASK = G_IO_FLAG_APPEND | G_IO_FLAG_NONBLOCK } GIOFlags; struct _GIOChannel { /*< private >*/ gint ref_count; GIOFuncs *funcs; gchar *encoding; GIConv read_cd; GIConv write_cd; gchar *line_term; /* String which indicates the end of a line of text */ guint line_term_len; /* So we can have null in the line term */ gsize buf_size; GString *read_buf; /* Raw data from the channel */ GString *encoded_read_buf; /* Channel data converted to UTF-8 */ GString *write_buf; /* Data ready to be written to the file */ gchar partial_write_buf[6]; /* UTF-8 partial characters, null terminated */ /* Group the flags together, immediately after partial_write_buf, to save memory */ guint use_buffer : 1; /* The encoding uses the buffers */ guint do_encode : 1; /* The encoding uses the GIConv coverters */ guint close_on_unref : 1; /* Close the channel on final unref */ guint is_readable : 1; /* Cached GIOFlag */ guint is_writeable : 1; /* ditto */ guint is_seekable : 1; /* ditto */ gpointer reserved1; gpointer reserved2; }; typedef gboolean (*GIOFunc) (GIOChannel *source, GIOCondition condition, gpointer data); struct _GIOFuncs { GIOStatus (*io_read) (GIOChannel *channel, gchar *buf, gsize count, gsize *bytes_read, GError **err); GIOStatus (*io_write) (GIOChannel *channel, const gchar *buf, gsize count, gsize *bytes_written, GError **err); GIOStatus (*io_seek) (GIOChannel *channel, gint64 offset, GSeekType type, GError **err); GIOStatus (*io_close) (GIOChannel *channel, GError **err); GSource* (*io_create_watch) (GIOChannel *channel, GIOCondition condition); void (*io_free) (GIOChannel *channel); GIOStatus (*io_set_flags) (GIOChannel *channel, GIOFlags flags, GError **err); GIOFlags (*io_get_flags) (GIOChannel *channel); }; GLIB_AVAILABLE_IN_ALL void g_io_channel_init (GIOChannel *channel); GLIB_AVAILABLE_IN_ALL GIOChannel *g_io_channel_ref (GIOChannel *channel); GLIB_AVAILABLE_IN_ALL void g_io_channel_unref (GIOChannel *channel); GLIB_DEPRECATED_FOR(g_io_channel_read_chars) GIOError g_io_channel_read (GIOChannel *channel, gchar *buf, gsize count, gsize *bytes_read); GLIB_DEPRECATED_FOR(g_io_channel_write_chars) GIOError g_io_channel_write (GIOChannel *channel, const gchar *buf, gsize count, gsize *bytes_written); GLIB_DEPRECATED_FOR(g_io_channel_seek_position) GIOError g_io_channel_seek (GIOChannel *channel, gint64 offset, GSeekType type); GLIB_DEPRECATED_FOR(g_io_channel_shutdown) void g_io_channel_close (GIOChannel *channel); GLIB_AVAILABLE_IN_ALL GIOStatus g_io_channel_shutdown (GIOChannel *channel, gboolean flush, GError **err); GLIB_AVAILABLE_IN_ALL guint g_io_add_watch_full (GIOChannel *channel, gint priority, GIOCondition condition, GIOFunc func, gpointer user_data, GDestroyNotify notify); GLIB_AVAILABLE_IN_ALL GSource * g_io_create_watch (GIOChannel *channel, GIOCondition condition); GLIB_AVAILABLE_IN_ALL guint g_io_add_watch (GIOChannel *channel, GIOCondition condition, GIOFunc func, gpointer user_data); /* character encoding conversion involved functions. */ GLIB_AVAILABLE_IN_ALL void g_io_channel_set_buffer_size (GIOChannel *channel, gsize size); GLIB_AVAILABLE_IN_ALL gsize g_io_channel_get_buffer_size (GIOChannel *channel); GLIB_AVAILABLE_IN_ALL GIOCondition g_io_channel_get_buffer_condition (GIOChannel *channel); GLIB_AVAILABLE_IN_ALL GIOStatus g_io_channel_set_flags (GIOChannel *channel, GIOFlags flags, GError **error); GLIB_AVAILABLE_IN_ALL GIOFlags g_io_channel_get_flags (GIOChannel *channel); GLIB_AVAILABLE_IN_ALL void g_io_channel_set_line_term (GIOChannel *channel, const gchar *line_term, gint length); GLIB_AVAILABLE_IN_ALL const gchar * g_io_channel_get_line_term (GIOChannel *channel, gint *length); GLIB_AVAILABLE_IN_ALL void g_io_channel_set_buffered (GIOChannel *channel, gboolean buffered); GLIB_AVAILABLE_IN_ALL gboolean g_io_channel_get_buffered (GIOChannel *channel); GLIB_AVAILABLE_IN_ALL GIOStatus g_io_channel_set_encoding (GIOChannel *channel, const gchar *encoding, GError **error); GLIB_AVAILABLE_IN_ALL const gchar * g_io_channel_get_encoding (GIOChannel *channel); GLIB_AVAILABLE_IN_ALL void g_io_channel_set_close_on_unref (GIOChannel *channel, gboolean do_close); GLIB_AVAILABLE_IN_ALL gboolean g_io_channel_get_close_on_unref (GIOChannel *channel); GLIB_AVAILABLE_IN_ALL GIOStatus g_io_channel_flush (GIOChannel *channel, GError **error); GLIB_AVAILABLE_IN_ALL GIOStatus g_io_channel_read_line (GIOChannel *channel, gchar **str_return, gsize *length, gsize *terminator_pos, GError **error); GLIB_AVAILABLE_IN_ALL GIOStatus g_io_channel_read_line_string (GIOChannel *channel, GString *buffer, gsize *terminator_pos, GError **error); GLIB_AVAILABLE_IN_ALL GIOStatus g_io_channel_read_to_end (GIOChannel *channel, gchar **str_return, gsize *length, GError **error); GLIB_AVAILABLE_IN_ALL GIOStatus g_io_channel_read_chars (GIOChannel *channel, gchar *buf, gsize count, gsize *bytes_read, GError **error); GLIB_AVAILABLE_IN_ALL GIOStatus g_io_channel_read_unichar (GIOChannel *channel, gunichar *thechar, GError **error); GLIB_AVAILABLE_IN_ALL GIOStatus g_io_channel_write_chars (GIOChannel *channel, const gchar *buf, gssize count, gsize *bytes_written, GError **error); GLIB_AVAILABLE_IN_ALL GIOStatus g_io_channel_write_unichar (GIOChannel *channel, gunichar thechar, GError **error); GLIB_AVAILABLE_IN_ALL GIOStatus g_io_channel_seek_position (GIOChannel *channel, gint64 offset, GSeekType type, GError **error); GLIB_AVAILABLE_IN_ALL GIOChannel* g_io_channel_new_file (const gchar *filename, const gchar *mode, GError **error); /* Error handling */ GLIB_AVAILABLE_IN_ALL GQuark g_io_channel_error_quark (void); GLIB_AVAILABLE_IN_ALL GIOChannelError g_io_channel_error_from_errno (gint en); /* On Unix, IO channels created with this function for any file * descriptor or socket. * * On Win32, this can be used either for files opened with the MSVCRT * (the Microsoft run-time C library) _open() or _pipe, including file * descriptors 0, 1 and 2 (corresponding to stdin, stdout and stderr), * or for Winsock SOCKETs. If the parameter is a legal file * descriptor, it is assumed to be such, otherwise it should be a * SOCKET. This relies on SOCKETs and file descriptors not * overlapping. If you want to be certain, call either * g_io_channel_win32_new_fd() or g_io_channel_win32_new_socket() * instead as appropriate. * * The term file descriptor as used in the context of Win32 refers to * the emulated Unix-like file descriptors MSVCRT provides. The native * corresponding concept is file HANDLE. There isn't as of yet a way to * get GIOChannels for Win32 file HANDLEs. */ GLIB_AVAILABLE_IN_ALL GIOChannel* g_io_channel_unix_new (int fd); GLIB_AVAILABLE_IN_ALL gint g_io_channel_unix_get_fd (GIOChannel *channel); /* Hook for GClosure / GSource integration. Don't touch */ GLIB_VAR GSourceFuncs g_io_watch_funcs; #ifdef G_OS_WIN32 /* You can use this "pseudo file descriptor" in a GPollFD to add * polling for Windows messages. GTK applications should not do that. */ #define G_WIN32_MSG_HANDLE 19981206 /* Use this to get a GPollFD from a GIOChannel, so that you can call * g_io_channel_win32_poll(). After calling this you should only use * g_io_channel_read() to read from the GIOChannel, i.e. never read() * from the underlying file descriptor. For SOCKETs, it is possible to call * recv(). */ GLIB_AVAILABLE_IN_ALL void g_io_channel_win32_make_pollfd (GIOChannel *channel, GIOCondition condition, GPollFD *fd); /* This can be used to wait until at least one of the channels is readable. * On Unix you would do a select() on the file descriptors of the channels. */ GLIB_AVAILABLE_IN_ALL gint g_io_channel_win32_poll (GPollFD *fds, gint n_fds, gint timeout_); /* Create an IO channel for Windows messages for window handle hwnd. */ #if GLIB_SIZEOF_VOID_P == 8 /* We use gsize here so that it is still an integer type and not a * pointer, like the guint in the traditional prototype. We can't use * intptr_t as that is not portable enough. */ GLIB_AVAILABLE_IN_ALL GIOChannel *g_io_channel_win32_new_messages (gsize hwnd); #else GLIB_AVAILABLE_IN_ALL GIOChannel *g_io_channel_win32_new_messages (guint hwnd); #endif /* Create an IO channel for C runtime (emulated Unix-like) file * descriptors. After calling g_io_add_watch() on a IO channel * returned by this function, you shouldn't call read() on the file * descriptor. This is because adding polling for a file descriptor is * implemented on Win32 by starting a thread that sits blocked in a * read() from the file descriptor most of the time. All reads from * the file descriptor should be done by this internal GLib * thread. Your code should call only g_io_channel_read_chars(). */ GLIB_AVAILABLE_IN_ALL GIOChannel* g_io_channel_win32_new_fd (gint fd); /* Get the C runtime file descriptor of a channel. */ GLIB_AVAILABLE_IN_ALL gint g_io_channel_win32_get_fd (GIOChannel *channel); /* Create an IO channel for a winsock socket. The parameter should be * a SOCKET. Contrary to IO channels for file descriptors (on *Win32), * you can use normal recv() or recvfrom() on sockets even if GLib * is polling them. */ GLIB_AVAILABLE_IN_ALL GIOChannel *g_io_channel_win32_new_socket (gint socket); GLIB_DEPRECATED_FOR(g_io_channel_win32_new_socket) GIOChannel *g_io_channel_win32_new_stream_socket (gint socket); GLIB_AVAILABLE_IN_ALL void g_io_channel_win32_set_debug (GIOChannel *channel, gboolean flag); #endif G_END_DECLS #endif /* __G_IOCHANNEL_H__ */