1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2009 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * David Korn <dgk@research.att.com> * 19 * Phong Vo <kpv@research.att.com> * 20 * * 21 ***********************************************************************/ 22 #pragma prototyped 23 24 #include "stdhdr.h" 25 26 wint_t 27 ungetwc(wint_t c, Sfio_t* f) 28 { 29 register unsigned char* s = (unsigned char*)&c; 30 register unsigned char* e = s + sizeof(c); 31 32 STDIO_INT(f, "ungetwc", wint_t, (wint_t, Sfio_t*), (c, f)) 33 34 FWIDE(f, WEOF); 35 while (s < e) 36 if (sfungetc(f, *s++) == EOF) 37 return WEOF; 38 return c; 39 } 40