xref: /csrg-svn/lib/libc/string/strncmp.c (revision 61193) 
11988Swnj /*
2*61193Sbostic  * Copyright (c) 1989, 1993
3*61193Sbostic  *	The Regents of the University of California.  All rights reserved.
435096Sbostic  *
542637Sbostic  * %sccs.include.redist.c%
61988Swnj  */
71988Swnj 
835096Sbostic #if defined(LIBC_SCCS) && !defined(lint)
9*61193Sbostic static char sccsid[] = "@(#)strncmp.c	8.1 (Berkeley) 06/04/93";
1035096Sbostic #endif /* LIBC_SCCS and not lint */
1135096Sbostic 
1246144Sbostic #include <sys/cdefs.h>
1342166Sbostic #include <string.h>
1442166Sbostic 
1542166Sbostic int
strncmp(s1,s2,n)1642166Sbostic strncmp(s1, s2, n)
1742166Sbostic 	register const char *s1, *s2;
1842166Sbostic 	register size_t n;
191988Swnj {
2042166Sbostic 
2142166Sbostic 	if (n == 0)
2242166Sbostic 		return (0);
2342166Sbostic 	do {
2442166Sbostic 		if (*s1 != *s2++)
2542166Sbostic 			return (*(unsigned char *)s1 - *(unsigned char *)--s2);
2642166Sbostic 		if (*s1++ == 0)
2742166Sbostic 			break;
2842166Sbostic 	} while (--n != 0);
2942166Sbostic 	return (0);
301988Swnj }
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