1 /* $OpenBSD: bcmp.c,v 1.6 2003/06/02 23:28:08 millert Exp $ */ 2 3 /* 4 * Copyright (c) 1987 Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #if defined(LIBC_SCCS) && !defined(lint) 33 /*static char *sccsid = "from: @(#)bcmp.c 5.6 (Berkeley) 2/24/91";*/ 34 static char *rcsid = "$OpenBSD: bcmp.c,v 1.6 2003/06/02 23:28:08 millert Exp $"; 35 #endif /* LIBC_SCCS and not lint */ 36 37 #if !defined(_KERNEL) && !defined(_STANDALONE) 38 #include <string.h> 39 #else 40 #include <lib/libkern/libkern.h> 41 #endif 42 43 /* 44 * bcmp -- vax cmpc3 instruction 45 */ 46 int 47 bcmp(b1, b2, length) 48 const void *b1, *b2; 49 register size_t length; 50 { 51 register const char *p1, *p2; 52 53 if (length == 0) 54 return(0); 55 p1 = (const char *)b1; 56 p2 = (const char *)b2; 57 do 58 if (*p1++ != *p2++) 59 break; 60 while (--length); 61 return(length); 62 } 63