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"
42 #include "gfiledescriptorbased.h"
53 static void g_file_descriptor_based_iface_init (GFileDescriptorBasedIface *iface);
56 #define g_local_file_input_stream_get_type _g_local_file_input_stream_get_type
58 G_DEFINE_TYPE_WITH_CODE (GLocalFileInputStream, g_local_file_input_stream, G_TYPE_FILE_INPUT_STREAM,
59 G_IMPLEMENT_INTERFACE (G_TYPE_FILE_DESCRIPTOR_BASED,
60 g_file_descriptor_based_iface_init)
63 G_DEFINE_TYPE_WITH_CODE (GLocalFileInputStream, g_local_file_input_stream, G_TYPE_FILE_INPUT_STREAM,);
66 struct _GLocalFileInputStreamPrivate {
71 static gssize g_local_file_input_stream_read (GInputStream *stream,
74 GCancellable *cancellable,
76 static gssize g_local_file_input_stream_skip (GInputStream *stream,
78 GCancellable *cancellable,
80 static gboolean g_local_file_input_stream_close (GInputStream *stream,
81 GCancellable *cancellable,
83 static goffset g_local_file_input_stream_tell (GFileInputStream *stream);
84 static gboolean g_local_file_input_stream_can_seek (GFileInputStream *stream);
85 static gboolean g_local_file_input_stream_seek (GFileInputStream *stream,
88 GCancellable *cancellable,
90 static GFileInfo *g_local_file_input_stream_query_info (GFileInputStream *stream,
91 const char *attributes,
92 GCancellable *cancellable,
95 static int g_local_file_input_stream_get_fd (GFileDescriptorBased *stream);
99 g_local_file_input_stream_finalize (GObject *object)
101 G_OBJECT_CLASS (g_local_file_input_stream_parent_class)->finalize (object);
105 _g_local_file_input_stream_set_do_close (GLocalFileInputStream *in,
108 in->priv->do_close = do_close;
112 g_local_file_input_stream_class_init (GLocalFileInputStreamClass *klass)
114 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
115 GInputStreamClass *stream_class = G_INPUT_STREAM_CLASS (klass);
116 GFileInputStreamClass *file_stream_class = G_FILE_INPUT_STREAM_CLASS (klass);
118 g_type_class_add_private (klass, sizeof (GLocalFileInputStreamPrivate));
120 gobject_class->finalize = g_local_file_input_stream_finalize;
122 stream_class->read_fn = g_local_file_input_stream_read;
123 stream_class->skip = g_local_file_input_stream_skip;
124 stream_class->close_fn = g_local_file_input_stream_close;
125 file_stream_class->tell = g_local_file_input_stream_tell;
126 file_stream_class->can_seek = g_local_file_input_stream_can_seek;
127 file_stream_class->seek = g_local_file_input_stream_seek;
128 file_stream_class->query_info = g_local_file_input_stream_query_info;
133 g_file_descriptor_based_iface_init (GFileDescriptorBasedIface *iface)
135 iface->get_fd = g_local_file_input_stream_get_fd;
140 g_local_file_input_stream_init (GLocalFileInputStream *info)
142 info->priv = G_TYPE_INSTANCE_GET_PRIVATE (info,
143 G_TYPE_LOCAL_FILE_INPUT_STREAM,
144 GLocalFileInputStreamPrivate);
145 info->priv->do_close = TRUE;
149 _g_local_file_input_stream_new (int fd)
151 GLocalFileInputStream *stream;
153 stream = g_object_new (G_TYPE_LOCAL_FILE_INPUT_STREAM, NULL);
154 stream->priv->fd = fd;
156 return G_FILE_INPUT_STREAM (stream);
160 g_local_file_input_stream_read (GInputStream *stream,
163 GCancellable *cancellable,
166 GLocalFileInputStream *file;
169 file = G_LOCAL_FILE_INPUT_STREAM (stream);
174 if (g_cancellable_set_error_if_cancelled (cancellable, error))
176 res = read (file->priv->fd, buffer, count);
184 g_set_error (error, G_IO_ERROR,
185 g_io_error_from_errno (errsv),
186 _("Error reading from file: %s"),
197 g_local_file_input_stream_skip (GInputStream *stream,
199 GCancellable *cancellable,
203 GLocalFileInputStream *file;
205 file = G_LOCAL_FILE_INPUT_STREAM (stream);
207 if (g_cancellable_set_error_if_cancelled (cancellable, error))
210 start = lseek (file->priv->fd, 0, SEEK_CUR);
215 g_set_error (error, G_IO_ERROR,
216 g_io_error_from_errno (errsv),
217 _("Error seeking in file: %s"),
222 res = lseek (file->priv->fd, count, SEEK_CUR);
227 g_set_error (error, G_IO_ERROR,
228 g_io_error_from_errno (errsv),
229 _("Error seeking in file: %s"),
238 g_local_file_input_stream_close (GInputStream *stream,
239 GCancellable *cancellable,
242 GLocalFileInputStream *file;
245 file = G_LOCAL_FILE_INPUT_STREAM (stream);
247 if (!file->priv->do_close)
250 if (file->priv->fd == -1)
255 res = close (file->priv->fd);
260 g_set_error (error, G_IO_ERROR,
261 g_io_error_from_errno (errsv),
262 _("Error closing file: %s"),
273 g_local_file_input_stream_tell (GFileInputStream *stream)
275 GLocalFileInputStream *file;
278 file = G_LOCAL_FILE_INPUT_STREAM (stream);
280 pos = lseek (file->priv->fd, 0, SEEK_CUR);
282 if (pos == (off_t)-1)
289 g_local_file_input_stream_can_seek (GFileInputStream *stream)
291 GLocalFileInputStream *file;
294 file = G_LOCAL_FILE_INPUT_STREAM (stream);
296 pos = lseek (file->priv->fd, 0, SEEK_CUR);
298 if (pos == (off_t)-1 && errno == ESPIPE)
305 seek_type_to_lseek (GSeekType type)
322 g_local_file_input_stream_seek (GFileInputStream *stream,
325 GCancellable *cancellable,
328 GLocalFileInputStream *file;
331 file = G_LOCAL_FILE_INPUT_STREAM (stream);
333 pos = lseek (file->priv->fd, offset, seek_type_to_lseek (type));
335 if (pos == (off_t)-1)
339 g_set_error (error, G_IO_ERROR,
340 g_io_error_from_errno (errsv),
341 _("Error seeking in file: %s"),
350 g_local_file_input_stream_query_info (GFileInputStream *stream,
351 const char *attributes,
352 GCancellable *cancellable,
355 GLocalFileInputStream *file;
357 file = G_LOCAL_FILE_INPUT_STREAM (stream);
359 if (g_cancellable_set_error_if_cancelled (cancellable, error))
362 return _g_local_file_info_get_from_fd (file->priv->fd,
369 g_local_file_input_stream_get_fd (GFileDescriptorBased *fd_based)
371 GLocalFileInputStream *stream = G_LOCAL_FILE_INPUT_STREAM (fd_based);
372 return stream->priv->fd;