1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Knowledge Ventures * 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 <ast.h> 25 26 #if _lib_memchr 27 28 NoN(memchr) 29 30 #else 31 32 /* 33 * Return the ptr in sp at which the character c appears; 34 * 0 if not found in n chars; don't stop at \0. 35 */ 36 37 void* 38 memchr(const void* asp, register int c, size_t n) 39 { 40 register const char* sp = (char*)asp; 41 register const char* ep = sp + n; 42 43 while (sp < ep) 44 if (*sp++ == c) 45 return(--sp); 46 return(0); 47 } 48 49 #endif 50