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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2011 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
#include "stdhdr.h"
int
fwide(Sfio_t* f, int mode)
{
STDIO_INT(f, "fwide", int, (Sfio_t*, int), (f, mode))
if (mode > 0)
{
f->bits &= ~SF_MB;
f->bits |= SF_WC;
}
else if (mode < 0)
{
f->bits &= ~SF_WC;
f->bits |= SF_MB;
}
if (f->bits & SF_MB)
return -1;
if (f->bits & SF_WC)
return 1;
if ((f->flags & SF_SYNCED) || f->next > f->data)
{
f->bits |= SF_MB;
return -1;
}
return 0;
}
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