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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@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-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 ssize_t stream_read (CamelStream *stream, char *buffer, size_t n) { return 0; }
static ssize_t stream_write (CamelStream *stream, const char *buffer, size_t n) { return n; }
static int stream_close (CamelStream *stream) { return 0; }
static int stream_flush (CamelStream *stream) { return 0; }
static gboolean stream_eos (CamelStream *stream) { return TRUE; }
static int stream_reset (CamelStream *stream) { 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_fs_new_with_fd:
* @fd: a file descriptor
*
* Returns a NULL stream. A null stream is always at eof, and
* always returns success for all reads and writes.
*
* Return value: the stream
**/
CamelStreamNull *
camel_stream_null_new(void)
{
return (CamelStreamNull *)camel_object_new(camel_stream_null_get_type ());
}
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