1/* GIO - GLib Input, Output 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_INPUT_STREAM_H__
22#define __G_FILE_INPUT_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/ginputstream.h>
29
30G_BEGIN_DECLS
31
32#define G_TYPE_FILE_INPUT_STREAM (g_file_input_stream_get_type ())
33#define G_FILE_INPUT_STREAM(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_FILE_INPUT_STREAM, GFileInputStream))
34#define G_FILE_INPUT_STREAM_CLASS(k) (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_FILE_INPUT_STREAM, GFileInputStreamClass))
35#define G_IS_FILE_INPUT_STREAM(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_FILE_INPUT_STREAM))
36#define G_IS_FILE_INPUT_STREAM_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_FILE_INPUT_STREAM))
37#define G_FILE_INPUT_STREAM_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_TYPE_FILE_INPUT_STREAM, GFileInputStreamClass))
38
39/**
40 * GFileInputStream:
41 *
42 * A subclass of GInputStream for opened files. This adds
43 * a few file-specific operations and seeking.
44 *
45 * #GFileInputStream implements #GSeekable.
46 **/
47typedef struct _GFileInputStreamClass GFileInputStreamClass;
48typedef struct _GFileInputStreamPrivate GFileInputStreamPrivate;
49
50struct _GFileInputStream
51{
52 GInputStream parent_instance;
53
54 /*< private >*/
55 GFileInputStreamPrivate *priv;
56};
57
58struct _GFileInputStreamClass
59{
60 GInputStreamClass parent_class;
61
62 goffset (* tell) (GFileInputStream *stream);
63 gboolean (* can_seek) (GFileInputStream *stream);
64 gboolean (* seek) (GFileInputStream *stream,
65 goffset offset,
66 GSeekType type,
67 GCancellable *cancellable,
68 GError **error);
69 GFileInfo * (* query_info) (GFileInputStream *stream,
70 const char *attributes,
71 GCancellable *cancellable,
72 GError **error);
73 void (* query_info_async) (GFileInputStream *stream,
74 const char *attributes,
75 int io_priority,
76 GCancellable *cancellable,
77 GAsyncReadyCallback callback,
78 gpointer user_data);
79 GFileInfo * (* query_info_finish) (GFileInputStream *stream,
80 GAsyncResult *result,
81 GError **error);
82
83 /*< private >*/
84 /* Padding for future expansion */
85 void (*_g_reserved1) (void);
86 void (*_g_reserved2) (void);
87 void (*_g_reserved3) (void);
88 void (*_g_reserved4) (void);
89 void (*_g_reserved5) (void);
90};
91
92GLIB_AVAILABLE_IN_ALL
93GType g_file_input_stream_get_type (void) G_GNUC_CONST;
94
95GLIB_AVAILABLE_IN_ALL
96GFileInfo *g_file_input_stream_query_info (GFileInputStream *stream,
97 const char *attributes,
98 GCancellable *cancellable,
99 GError **error);
100GLIB_AVAILABLE_IN_ALL
101void g_file_input_stream_query_info_async (GFileInputStream *stream,
102 const char *attributes,
103 int io_priority,
104 GCancellable *cancellable,
105 GAsyncReadyCallback callback,
106 gpointer user_data);
107GLIB_AVAILABLE_IN_ALL
108GFileInfo *g_file_input_stream_query_info_finish (GFileInputStream *stream,
109 GAsyncResult *result,
110 GError **error);
111
112G_END_DECLS
113
114#endif /* __G_FILE_FILE_INPUT_STREAM_H__ */
115

source code of gtk/subprojects/glib/gio/gfileinputstream.h