Annotation of sys/lib/libkern/bcmp.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: bcmp.c,v 1.8 2004/11/28 07:23:41 mickey 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 *rcsid = "$OpenBSD: bcmp.c,v 1.8 2004/11/28 07:23:41 mickey Exp $";
34: #endif /* LIBC_SCCS and not lint */
35:
36: #if !defined(_KERNEL) && !defined(_STANDALONE)
37: #include <string.h>
38: #else
39: #include <lib/libkern/libkern.h>
40: #endif
41:
42: /*
43: * bcmp -- vax cmpc3 instruction
44: */
45: int
46: bcmp(b1, b2, length)
47: const void *b1, *b2;
48: register size_t length;
49: {
50: register char *p1, *p2;
51:
52: if (length == 0)
53: return(0);
54: p1 = (char *)b1;
55: p2 = (char *)b2;
56: do
57: if (*p1++ != *p2++)
58: break;
59: while (--length);
60: return(length);
61: }
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