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>
35 #include "gcancellable.h"
37 #include "glocalfileinputstream.h"
38 #include "glocalfileinfo.h"
47 #define g_local_file_input_stream_get_type _g_local_file_input_stream_get_type
48 G_DEFINE_TYPE (GLocalFileInputStream, g_local_file_input_stream, G_TYPE_FILE_INPUT_STREAM);
50 struct _GLocalFileInputStreamPrivate {
55 static gssize g_local_file_input_stream_read (GInputStream *stream,
58 GCancellable *cancellable,
60 static gssize g_local_file_input_stream_skip (GInputStream *stream,
62 GCancellable *cancellable,
64 static gboolean g_local_file_input_stream_close (GInputStream *stream,
65 GCancellable *cancellable,
67 static goffset g_local_file_input_stream_tell (GFileInputStream *stream);
68 static gboolean g_local_file_input_stream_can_seek (GFileInputStream *stream);
69 static gboolean g_local_file_input_stream_seek (GFileInputStream *stream,
72 GCancellable *cancellable,
74 static GFileInfo *g_local_file_input_stream_query_info (GFileInputStream *stream,
75 const char *attributes,
76 GCancellable *cancellable,
80 g_local_file_input_stream_finalize (GObject *object)
82 G_OBJECT_CLASS (g_local_file_input_stream_parent_class)->finalize (object);
86 _g_local_file_input_stream_set_do_close (GLocalFileInputStream *in,
89 in->priv->do_close = do_close;
93 g_local_file_input_stream_class_init (GLocalFileInputStreamClass *klass)
95 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
96 GInputStreamClass *stream_class = G_INPUT_STREAM_CLASS (klass);
97 GFileInputStreamClass *file_stream_class = G_FILE_INPUT_STREAM_CLASS (klass);
99 g_type_class_add_private (klass, sizeof (GLocalFileInputStreamPrivate));
101 gobject_class->finalize = g_local_file_input_stream_finalize;
103 stream_class->read_fn = g_local_file_input_stream_read;
104 stream_class->skip = g_local_file_input_stream_skip;
105 stream_class->close_fn = g_local_file_input_stream_close;
106 file_stream_class->tell = g_local_file_input_stream_tell;
107 file_stream_class->can_seek = g_local_file_input_stream_can_seek;
108 file_stream_class->seek = g_local_file_input_stream_seek;
109 file_stream_class->query_info = g_local_file_input_stream_query_info;
113 g_local_file_input_stream_init (GLocalFileInputStream *info)
115 info->priv = G_TYPE_INSTANCE_GET_PRIVATE (info,
116 G_TYPE_LOCAL_FILE_INPUT_STREAM,
117 GLocalFileInputStreamPrivate);
118 info->priv->do_close = TRUE;
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->do_close)
223 if (file->priv->fd == -1)
228 res = close (file->priv->fd);
233 g_set_error (error, G_IO_ERROR,
234 g_io_error_from_errno (errsv),
235 _("Error closing file: %s"),
246 g_local_file_input_stream_tell (GFileInputStream *stream)
248 GLocalFileInputStream *file;
251 file = G_LOCAL_FILE_INPUT_STREAM (stream);
253 pos = lseek (file->priv->fd, 0, SEEK_CUR);
255 if (pos == (off_t)-1)
262 g_local_file_input_stream_can_seek (GFileInputStream *stream)
264 GLocalFileInputStream *file;
267 file = G_LOCAL_FILE_INPUT_STREAM (stream);
269 pos = lseek (file->priv->fd, 0, SEEK_CUR);
271 if (pos == (off_t)-1 && errno == ESPIPE)
278 seek_type_to_lseek (GSeekType type)
295 g_local_file_input_stream_seek (GFileInputStream *stream,
298 GCancellable *cancellable,
301 GLocalFileInputStream *file;
304 file = G_LOCAL_FILE_INPUT_STREAM (stream);
306 pos = lseek (file->priv->fd, offset, seek_type_to_lseek (type));
308 if (pos == (off_t)-1)
312 g_set_error (error, G_IO_ERROR,
313 g_io_error_from_errno (errsv),
314 _("Error seeking in file: %s"),
323 g_local_file_input_stream_query_info (GFileInputStream *stream,
324 const char *attributes,
325 GCancellable *cancellable,
328 GLocalFileInputStream *file;
330 file = G_LOCAL_FILE_INPUT_STREAM (stream);
332 if (g_cancellable_set_error_if_cancelled (cancellable, error))
335 return _g_local_file_info_get_from_fd (file->priv->fd,