1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright (C) 2006-2007 Red Hat, Inc.
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 of the License, or (at your option) any later version.
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.
15 * You should have received a copy of the GNU Lesser General
16 * Public License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
18 * Boston, MA 02111-1307, USA.
20 * Author: Alexander Larsson <alexl@redhat.com>
25 #include <sys/types.h>
34 #include <glib/gstdio.h>
36 #include "glocalfileinputstream.h"
37 #include "glocalfileinfo.h"
46 #define g_local_file_input_stream_get_type _g_local_file_input_stream_get_type
47 G_DEFINE_TYPE (GLocalFileInputStream, g_local_file_input_stream, G_TYPE_FILE_INPUT_STREAM);
49 struct _GLocalFileInputStreamPrivate {
53 static gssize g_local_file_input_stream_read (GInputStream *stream,
56 GCancellable *cancellable,
58 static gssize g_local_file_input_stream_skip (GInputStream *stream,
60 GCancellable *cancellable,
62 static gboolean g_local_file_input_stream_close (GInputStream *stream,
63 GCancellable *cancellable,
65 static goffset g_local_file_input_stream_tell (GFileInputStream *stream);
66 static gboolean g_local_file_input_stream_can_seek (GFileInputStream *stream);
67 static gboolean g_local_file_input_stream_seek (GFileInputStream *stream,
70 GCancellable *cancellable,
72 static GFileInfo *g_local_file_input_stream_query_info (GFileInputStream *stream,
74 GCancellable *cancellable,
78 g_local_file_input_stream_finalize (GObject *object)
80 GLocalFileInputStream *file;
82 file = G_LOCAL_FILE_INPUT_STREAM (object);
84 G_OBJECT_CLASS (g_local_file_input_stream_parent_class)->finalize (object);
88 g_local_file_input_stream_class_init (GLocalFileInputStreamClass *klass)
90 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
91 GInputStreamClass *stream_class = G_INPUT_STREAM_CLASS (klass);
92 GFileInputStreamClass *file_stream_class = G_FILE_INPUT_STREAM_CLASS (klass);
94 g_type_class_add_private (klass, sizeof (GLocalFileInputStreamPrivate));
96 gobject_class->finalize = g_local_file_input_stream_finalize;
98 stream_class->read_fn = g_local_file_input_stream_read;
99 stream_class->skip = g_local_file_input_stream_skip;
100 stream_class->close_fn = g_local_file_input_stream_close;
101 file_stream_class->tell = g_local_file_input_stream_tell;
102 file_stream_class->can_seek = g_local_file_input_stream_can_seek;
103 file_stream_class->seek = g_local_file_input_stream_seek;
104 file_stream_class->query_info = g_local_file_input_stream_query_info;
108 g_local_file_input_stream_init (GLocalFileInputStream *info)
110 info->priv = G_TYPE_INSTANCE_GET_PRIVATE (info,
111 G_TYPE_LOCAL_FILE_INPUT_STREAM,
112 GLocalFileInputStreamPrivate);
116 * g_local_file_input_stream_new:
117 * @fd: File Descriptor.
119 * Returns: #GFileInputStream for the given file descriptor.
122 _g_local_file_input_stream_new (int fd)
124 GLocalFileInputStream *stream;
126 stream = g_object_new (G_TYPE_LOCAL_FILE_INPUT_STREAM, NULL);
127 stream->priv->fd = fd;
129 return G_FILE_INPUT_STREAM (stream);
133 g_local_file_input_stream_read (GInputStream *stream,
136 GCancellable *cancellable,
139 GLocalFileInputStream *file;
142 file = G_LOCAL_FILE_INPUT_STREAM (stream);
147 if (g_cancellable_set_error_if_cancelled (cancellable, error))
149 res = read (file->priv->fd, buffer, count);
157 g_set_error (error, G_IO_ERROR,
158 g_io_error_from_errno (errsv),
159 _("Error reading from file: %s"),
170 g_local_file_input_stream_skip (GInputStream *stream,
172 GCancellable *cancellable,
176 GLocalFileInputStream *file;
178 file = G_LOCAL_FILE_INPUT_STREAM (stream);
180 if (g_cancellable_set_error_if_cancelled (cancellable, error))
183 start = lseek (file->priv->fd, 0, SEEK_CUR);
188 g_set_error (error, G_IO_ERROR,
189 g_io_error_from_errno (errsv),
190 _("Error seeking in file: %s"),
195 res = lseek (file->priv->fd, count, SEEK_CUR);
200 g_set_error (error, G_IO_ERROR,
201 g_io_error_from_errno (errsv),
202 _("Error seeking in file: %s"),
211 g_local_file_input_stream_close (GInputStream *stream,
212 GCancellable *cancellable,
215 GLocalFileInputStream *file;
218 file = G_LOCAL_FILE_INPUT_STREAM (stream);
220 if (file->priv->fd == -1)
225 res = close (file->priv->fd);
230 g_set_error (error, G_IO_ERROR,
231 g_io_error_from_errno (errsv),
232 _("Error closing file: %s"),
243 g_local_file_input_stream_tell (GFileInputStream *stream)
245 GLocalFileInputStream *file;
248 file = G_LOCAL_FILE_INPUT_STREAM (stream);
250 pos = lseek (file->priv->fd, 0, SEEK_CUR);
252 if (pos == (off_t)-1)
259 g_local_file_input_stream_can_seek (GFileInputStream *stream)
261 GLocalFileInputStream *file;
264 file = G_LOCAL_FILE_INPUT_STREAM (stream);
266 pos = lseek (file->priv->fd, 0, SEEK_CUR);
268 if (pos == (off_t)-1 && errno == ESPIPE)
275 seek_type_to_lseek (GSeekType type)
292 g_local_file_input_stream_seek (GFileInputStream *stream,
295 GCancellable *cancellable,
298 GLocalFileInputStream *file;
301 file = G_LOCAL_FILE_INPUT_STREAM (stream);
303 pos = lseek (file->priv->fd, offset, seek_type_to_lseek (type));
305 if (pos == (off_t)-1)
309 g_set_error (error, G_IO_ERROR,
310 g_io_error_from_errno (errsv),
311 _("Error seeking in file: %s"),
320 g_local_file_input_stream_query_info (GFileInputStream *stream,
322 GCancellable *cancellable,
325 GLocalFileInputStream *file;
327 file = G_LOCAL_FILE_INPUT_STREAM (stream);
329 if (g_cancellable_set_error_if_cancelled (cancellable, error))
332 return _g_local_file_info_get_from_fd (file->priv->fd,