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 <ast.h> 25 26 #if _lib_memcmp 27 28 NoN(memcmp) 29 30 #else 31 32 int 33 memcmp(const void* ab1, const void* ab2, size_t n) 34 { 35 register const unsigned char* b1 = (const unsigned char*)ab1; 36 register const unsigned char* b2 = (const unsigned char*)ab2; 37 register const unsigned char* e = b1 + n; 38 39 while (b1 < e) 40 if (*b1++ != *b2++) 41 return(*--b1 - *--b2); 42 return(0); 43 } 44 45 #endif 46