/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 2003-2011 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* return null write stream for pure codexdata()
*/
#include <sfio_t.h>
#include <codex.h>
static ssize_t
nullread(Sfio_t* f, void* buf, size_t n, Sfdisc_t* disc)
{
return 0;
}
static ssize_t
nullwrite(Sfio_t* f, const void* buf, size_t n, Sfdisc_t* disc)
{
return n;
}
static Sfdisc_t nulldisc = { nullread, nullwrite };
static const char nullbuf[1];
static Sfio_t null = SFNEW(nullbuf, 0, 0, SF_WRITE, &nulldisc, 0);
Sfio_t*
codexnull(void)
{
return &null;
}