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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; fill-column: 160 -*- */
/* camel-stream.c : abstract class for a stream */
/*
* Author:
* Michael Zucchi <notzed@ximian.com>
*
* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU Lesser General Public
* License as published by the Free Software Foundation.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "camel-stream-null.h"
static CamelObjectClass *parent_class = NULL;
/* Returns the class for a CamelStream */
#define CS_CLASS(so) CAMEL_STREAM_NULL_CLASS(CAMEL_OBJECT_GET_CLASS(so))
/* dummy implementations, for a NULL stream */
static gssize stream_read (CamelStream *stream, gchar *buffer, gsize n) { return 0; }
static gssize stream_write (CamelStream *stream, const gchar *buffer, gsize n) { ((CamelStreamNull *)stream)->written += n; return n; }
static gint stream_close (CamelStream *stream) { return 0; }
static gint stream_flush (CamelStream *stream) { return 0; }
static gboolean stream_eos (CamelStream *stream) { return TRUE; }
static gint stream_reset (CamelStream *stream) { ((CamelStreamNull *)stream)->written = 0; return 0; }
static void
camel_stream_null_class_init (CamelStreamClass *camel_stream_null_class)
{
CamelStreamClass *camel_stream_class = (CamelStreamClass *)camel_stream_null_class;
parent_class = camel_type_get_global_classfuncs( CAMEL_OBJECT_TYPE );
/* virtual method definition */
camel_stream_class->read = stream_read;
camel_stream_class->write = stream_write;
camel_stream_class->close = stream_close;
camel_stream_class->flush = stream_flush;
camel_stream_class->eos = stream_eos;
camel_stream_class->reset = stream_reset;
}
CamelType
camel_stream_null_get_type (void)
{
static CamelType camel_stream_null_type = CAMEL_INVALID_TYPE;
if (camel_stream_null_type == CAMEL_INVALID_TYPE) {
camel_stream_null_type = camel_type_register( camel_stream_get_type(),
"CamelStreamNull",
sizeof( CamelStreamNull ),
sizeof( CamelStreamNullClass ),
(CamelObjectClassInitFunc) camel_stream_null_class_init,
NULL,
NULL,
NULL );
}
return camel_stream_null_type;
}
/**
* camel_stream_null_new:
*
* Returns a null stream. A null stream is always at eof, and
* always returns success for all reads and writes.
*
* Returns: a new #CamelStreamNull
**/
CamelStream *
camel_stream_null_new(void)
{
return (CamelStream *)camel_object_new(camel_stream_null_get_type ());
}
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