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: Christian Kellner <gicmo@gnome.org>
24 #include "gfilteroutputstream.h"
25 #include "goutputstream.h"
30 * SECTION:gfilteroutputstream
31 * @short_description: Filter Output Stream
34 * Base class for output stream implementations that perform some
35 * kind of filtering operation on a base stream. Typical examples
36 * of filtering operations are character set conversion, compression
37 * and byte order flipping.
46 static void g_filter_output_stream_set_property (GObject
*object
,
51 static void g_filter_output_stream_get_property (GObject
*object
,
55 static void g_filter_output_stream_dispose (GObject
*object
);
58 static gssize
g_filter_output_stream_write (GOutputStream
*stream
,
61 GCancellable
*cancellable
,
63 static gboolean
g_filter_output_stream_flush (GOutputStream
*stream
,
64 GCancellable
*cancellable
,
66 static gboolean
g_filter_output_stream_close (GOutputStream
*stream
,
67 GCancellable
*cancellable
,
70 G_DEFINE_ABSTRACT_TYPE (GFilterOutputStream
, g_filter_output_stream
, G_TYPE_OUTPUT_STREAM
)
72 #define GET_PRIVATE(inst) G_TYPE_INSTANCE_GET_PRIVATE (inst, \
73 G_TYPE_FILTER_OUTPUT_STREAM, GFilterOutputStreamPrivate)
78 } GFilterOutputStreamPrivate
;
81 g_filter_output_stream_class_init (GFilterOutputStreamClass
*klass
)
83 GObjectClass
*object_class
;
84 GOutputStreamClass
*ostream_class
;
86 object_class
= G_OBJECT_CLASS (klass
);
87 object_class
->get_property
= g_filter_output_stream_get_property
;
88 object_class
->set_property
= g_filter_output_stream_set_property
;
89 object_class
->dispose
= g_filter_output_stream_dispose
;
91 ostream_class
= G_OUTPUT_STREAM_CLASS (klass
);
92 ostream_class
->write_fn
= g_filter_output_stream_write
;
93 ostream_class
->flush
= g_filter_output_stream_flush
;
94 ostream_class
->close_fn
= g_filter_output_stream_close
;
96 g_type_class_add_private (klass
, sizeof (GFilterOutputStreamPrivate
));
98 g_object_class_install_property (object_class
,
100 g_param_spec_object ("base-stream",
101 P_("The Filter Base Stream"),
102 P_("The underlying base stream on which the io ops will be done."),
103 G_TYPE_OUTPUT_STREAM
,
104 G_PARAM_READWRITE
| G_PARAM_CONSTRUCT_ONLY
|
105 G_PARAM_STATIC_NAME
|G_PARAM_STATIC_NICK
|G_PARAM_STATIC_BLURB
));
107 g_object_class_install_property (object_class
,
109 g_param_spec_boolean ("close-base-stream",
110 P_("Close Base Stream"),
111 P_("If the base stream should be closed when the filter stream is closed."),
112 TRUE
, G_PARAM_READWRITE
| G_PARAM_CONSTRUCT_ONLY
|
113 G_PARAM_STATIC_NAME
|G_PARAM_STATIC_NICK
|G_PARAM_STATIC_BLURB
));
117 g_filter_output_stream_set_property (GObject
*object
,
122 GFilterOutputStream
*filter_stream
;
125 filter_stream
= G_FILTER_OUTPUT_STREAM (object
);
129 case PROP_BASE_STREAM
:
130 obj
= g_value_dup_object (value
);
131 filter_stream
->base_stream
= G_OUTPUT_STREAM (obj
);
134 case PROP_CLOSE_BASE
:
135 g_filter_output_stream_set_close_base_stream (filter_stream
,
136 g_value_get_boolean (value
));
140 G_OBJECT_WARN_INVALID_PROPERTY_ID (object
, prop_id
, pspec
);
147 g_filter_output_stream_get_property (GObject
*object
,
152 GFilterOutputStream
*filter_stream
;
154 filter_stream
= G_FILTER_OUTPUT_STREAM (object
);
158 case PROP_BASE_STREAM
:
159 g_value_set_object (value
, filter_stream
->base_stream
);
162 case PROP_CLOSE_BASE
:
163 g_value_set_boolean (value
, GET_PRIVATE (filter_stream
)->close_base
);
167 G_OBJECT_WARN_INVALID_PROPERTY_ID (object
, prop_id
, pspec
);
174 g_filter_output_stream_dispose (GObject
*object
)
176 GFilterOutputStream
*stream
;
178 stream
= G_FILTER_OUTPUT_STREAM (object
);
180 G_OBJECT_CLASS (g_filter_output_stream_parent_class
)->dispose (object
);
182 if (stream
->base_stream
)
184 g_object_unref (stream
->base_stream
);
185 stream
->base_stream
= NULL
;
191 g_filter_output_stream_init (GFilterOutputStream
*stream
)
196 * g_filter_output_stream_get_base_stream:
197 * @stream: a #GFilterOutputStream.
199 * Gets the base stream for the filter stream.
201 * Returns: (transfer none): a #GOutputStream.
204 g_filter_output_stream_get_base_stream (GFilterOutputStream
*stream
)
206 g_return_val_if_fail (G_IS_FILTER_OUTPUT_STREAM (stream
), NULL
);
208 return stream
->base_stream
;
212 * g_filter_output_stream_get_close_base_stream:
213 * @stream: a #GFilterOutputStream.
215 * Returns whether the base stream will be closed when @stream is
218 * Return value: %TRUE if the base stream will be closed.
221 g_filter_output_stream_get_close_base_stream (GFilterOutputStream
*stream
)
223 g_return_val_if_fail (G_IS_FILTER_OUTPUT_STREAM (stream
), FALSE
);
225 return GET_PRIVATE (stream
)->close_base
;
229 * g_filter_output_stream_set_close_base_stream:
230 * @stream: a #GFilterOutputStream.
231 * @close_base: %TRUE to close the base stream.
233 * Sets whether the base stream will be closed when @stream is closed.
236 g_filter_output_stream_set_close_base_stream (GFilterOutputStream
*stream
,
239 GFilterOutputStreamPrivate
*priv
;
241 g_return_if_fail (G_IS_FILTER_OUTPUT_STREAM (stream
));
243 close_base
= !!close_base
;
245 priv
= GET_PRIVATE (stream
);
247 if (priv
->close_base
!= close_base
)
249 priv
->close_base
= close_base
;
250 g_object_notify (G_OBJECT (stream
), "close-base-stream");
255 g_filter_output_stream_write (GOutputStream
*stream
,
258 GCancellable
*cancellable
,
261 GFilterOutputStream
*filter_stream
;
264 filter_stream
= G_FILTER_OUTPUT_STREAM (stream
);
266 nwritten
= g_output_stream_write (filter_stream
->base_stream
,
276 g_filter_output_stream_flush (GOutputStream
*stream
,
277 GCancellable
*cancellable
,
280 GFilterOutputStream
*filter_stream
;
283 filter_stream
= G_FILTER_OUTPUT_STREAM (stream
);
285 res
= g_output_stream_flush (filter_stream
->base_stream
,
293 g_filter_output_stream_close (GOutputStream
*stream
,
294 GCancellable
*cancellable
,
299 if (GET_PRIVATE (stream
)->close_base
)
301 GFilterOutputStream
*filter_stream
;
303 filter_stream
= G_FILTER_OUTPUT_STREAM (stream
);
305 res
= g_output_stream_close (filter_stream
->base_stream
,