1 /* 2 * Copyright (c) 1985 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that this notice is preserved and that due credit is given 7 * to the University of California at Berkeley. The name of the University 8 * may not be used to endorse or promote products derived from this 9 * software without specific written prior permission. This software 10 * is provided ``as is'' without express or implied warranty. 11 */ 12 13 #if defined(LIBC_SCCS) && !defined(lint) 14 static char sccsid[] = "@(#)memcmp.c 5.3 (Berkeley) 05/25/88"; 15 #endif /* LIBC_SCCS and not lint */ 16 17 memcmp(s1, s2, n) 18 register char *s1, *s2; 19 register n; 20 { 21 while (--n >= 0) 22 if (*s1++ != *s2++) 23 return (*--s1 - *--s2); 24 return (0); 25 } 26