ungetwc.c revision 34f9b3eef6fdadbda0a846aa4d68691ac40eace5
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2009 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* 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"
wint_t
ungetwc(wint_t c, Sfio_t* f)
{
register unsigned char* s = (unsigned char*)&c;
register unsigned char* e = s + sizeof(c);
STDIO_INT(f, "ungetwc", wint_t, (wint_t, Sfio_t*), (c, f))
FWIDE(f, WEOF);
while (s < e)
if (sfungetc(f, *s++) == EOF)
return WEOF;
return c;
}