1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 31 32 33 #if !defined(_KMDB) && !defined(_BOOT) && !defined(_KERNEL) 34 35 #pragma weak memcmp = _memcmp 36 37 #include "synonyms.h" 38 #endif /* !_KMDB && !_BOOT && !_KERNEL */ 39 40 #include <sys/types.h> 41 #if defined(_KERNEL) 42 #include <sys/systm.h> 43 #else 44 #include <string.h> 45 #include <stddef.h> 46 #endif 47 48 /* 49 * Compare n bytes: s1>s2: >0 s1==s2: 0 s1<s2: <0 50 */ 51 int 52 memcmp(const void *s1, const void *s2, size_t n) 53 { 54 if (s1 != s2 && n != 0) { 55 const unsigned char *ps1 = s1; 56 const unsigned char *ps2 = s2; 57 58 do { 59 if (*ps1++ != *ps2++) 60 return (ps1[-1] - ps2[-1]); 61 } while (--n != 0); 62 } 63 64 return (0); 65 } 66