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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
*
* Author :
* Bertrand Guiheneuf <bertrand@helixcode.com>
*
* Copyright 1999, 2000 Helix Code, Inc. (http://www.helixcode.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include <config.h>
#include "camel-seekable-stream.h"
#include "camel-log.h"
static CamelStreamClass *parent_class=NULL;
/* Returns the class for a CamelSeekableStream */
#define CSS_CLASS(so) CAMEL_SEEKABLE_STREAM_CLASS (GTK_OBJECT(so)->klass)
static gint _seek (CamelSeekableStream *stream,
gint offset,
CamelStreamSeekPolicy policy);
static void _reset (CamelStream *stream);
static void
camel_seekable_stream_class_init (CamelSeekableStreamClass *camel_seekable_stream_class)
{
CamelStreamClass *camel_stream_class = CAMEL_STREAM_CLASS (camel_seekable_stream_class);
parent_class = gtk_type_class (camel_stream_get_type ());
/* seekable stream methods */
camel_seekable_stream_class->seek = _seek;
/* camel stream methods overload */
camel_stream_class->reset = _reset;
}
GtkType
camel_seekable_stream_get_type (void)
{
static GtkType camel_seekable_stream_type = 0;
if (!camel_seekable_stream_type) {
GtkTypeInfo camel_seekable_stream_info =
{
"CamelSeekableStream",
sizeof (CamelSeekableStream),
sizeof (CamelSeekableStreamClass),
(GtkClassInitFunc) camel_seekable_stream_class_init,
(GtkObjectInitFunc) NULL,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
camel_seekable_stream_type = gtk_type_unique (camel_stream_get_type (), &camel_seekable_stream_info);
}
return camel_seekable_stream_type;
}
static gint
_seek (CamelSeekableStream *stream,
gint offset,
CamelStreamSeekPolicy policy)
{
g_warning ("CamelSeekableStream::seek called on default implementation \n");
return -1;
}
/**
* camel_stream_seek:
* @stream: a CamelStream object.
* @offset: offset value
* @policy: what to do with the offset
*
*
*
* Return value: new position, -1 if operation failed.
**/
gint
camel_seekable_stream_seek (CamelSeekableStream *stream,
gint offset,
CamelStreamSeekPolicy policy)
{
return CSS_CLASS (stream)->seek (stream, offset, policy);
}
/**
* camel_seekable_stream_get_current_position: get the position of a stream
* @stream: seekable stream object
*
* Get the current position of a seekable stream.
*
* Return value: the position.
**/
guint32
camel_seekable_stream_get_current_position (CamelSeekableStream *stream)
{
return stream->cur_pos;
}
/* a default implementation of reset for seekable streams */
static void
_reset (CamelStream *stream)
{
CamelSeekableStream *seekable_stream;
g_assert (stream);
seekable_stream = CAMEL_SEEKABLE_STREAM (stream);
camel_seekable_stream_seek (seekable_stream, 0, CAMEL_STREAM_SET);
}
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