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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include "lint.h" 33 #include <string.h> 34 #include <sys/types.h> 35 36 /* 37 * Compare strings (at most n bytes) 38 * returns: s1>s2; >0 s1==s2; 0 s1<s2; <0 39 */ 40 int 41 strncmp(const char *s1, const char *s2, size_t n) 42 { 43 n++; 44 if (s1 == s2) 45 return (0); 46 while (--n != 0 && *s1 == *s2++) 47 if (*s1++ == '\0') 48 return (0); 49 return (n == 0 ? 0 : *(unsigned char *)s1 - *(unsigned char *)--s2); 50 } 51