1/* GIO - GLib Input, Io and Streaming Library
2 *
3 * Copyright (C) 2006-2007 Red Hat, Inc.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General
16 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
17 *
18 * Author: Alexander Larsson <alexl@redhat.com>
19 */
20
21#ifndef __G_FILE_IO_STREAM_H__
22#define __G_FILE_IO_STREAM_H__
23
24#if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
25#error "Only <gio/gio.h> can be included directly."
26#endif
27
28#include <gio/giostream.h>
29
30G_BEGIN_DECLS
31
32#define G_TYPE_FILE_IO_STREAM (g_file_io_stream_get_type ())
33#define G_FILE_IO_STREAM(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_FILE_IO_STREAM, GFileIOStream))
34#define G_FILE_IO_STREAM_CLASS(k) (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_FILE_IO_STREAM, GFileIOStreamClass))
35#define G_IS_FILE_IO_STREAM(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_FILE_IO_STREAM))
36#define G_IS_FILE_IO_STREAM_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_FILE_IO_STREAM))
37#define G_FILE_IO_STREAM_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_TYPE_FILE_IO_STREAM, GFileIOStreamClass))
38
39/**
40 * GFileIOStream:
41 *
42 * A subclass of GIOStream for opened files. This adds
43 * a few file-specific operations and seeking and truncating.
44 *
45 * #GFileIOStream implements GSeekable.
46 **/
47typedef struct _GFileIOStreamClass GFileIOStreamClass;
48typedef struct _GFileIOStreamPrivate GFileIOStreamPrivate;
49
50struct _GFileIOStream
51{
52 GIOStream parent_instance;
53
54 /*< private >*/
55 GFileIOStreamPrivate *priv;
56};
57
58struct _GFileIOStreamClass
59{
60 GIOStreamClass parent_class;
61
62 goffset (* tell) (GFileIOStream *stream);
63 gboolean (* can_seek) (GFileIOStream *stream);
64 gboolean (* seek) (GFileIOStream *stream,
65 goffset offset,
66 GSeekType type,
67 GCancellable *cancellable,
68 GError **error);
69 gboolean (* can_truncate) (GFileIOStream *stream);
70 gboolean (* truncate_fn) (GFileIOStream *stream,
71 goffset size,
72 GCancellable *cancellable,
73 GError **error);
74 GFileInfo * (* query_info) (GFileIOStream *stream,
75 const char *attributes,
76 GCancellable *cancellable,
77 GError **error);
78 void (* query_info_async) (GFileIOStream *stream,
79 const char *attributes,
80 int io_priority,
81 GCancellable *cancellable,
82 GAsyncReadyCallback callback,
83 gpointer user_data);
84 GFileInfo * (* query_info_finish) (GFileIOStream *stream,
85 GAsyncResult *result,
86 GError **error);
87 char * (* get_etag) (GFileIOStream *stream);
88
89 /* Padding for future expansion */
90 void (*_g_reserved1) (void);
91 void (*_g_reserved2) (void);
92 void (*_g_reserved3) (void);
93 void (*_g_reserved4) (void);
94 void (*_g_reserved5) (void);
95};
96
97GLIB_AVAILABLE_IN_ALL
98GType g_file_io_stream_get_type (void) G_GNUC_CONST;
99
100GLIB_AVAILABLE_IN_ALL
101GFileInfo *g_file_io_stream_query_info (GFileIOStream *stream,
102 const char *attributes,
103 GCancellable *cancellable,
104 GError **error);
105GLIB_AVAILABLE_IN_ALL
106void g_file_io_stream_query_info_async (GFileIOStream *stream,
107 const char *attributes,
108 int io_priority,
109 GCancellable *cancellable,
110 GAsyncReadyCallback callback,
111 gpointer user_data);
112GLIB_AVAILABLE_IN_ALL
113GFileInfo *g_file_io_stream_query_info_finish (GFileIOStream *stream,
114 GAsyncResult *result,
115 GError **error);
116GLIB_AVAILABLE_IN_ALL
117char * g_file_io_stream_get_etag (GFileIOStream *stream);
118
119G_END_DECLS
120
121#endif /* __G_FILE_FILE_IO_STREAM_H__ */
122

source code of include/glib-2.0/gio/gfileiostream.h