1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Torek. 7 * 8 * %sccs.include.redist.c% 9 */ 10 11 #if defined(LIBC_SCCS) && !defined(lint) 12 static char sccsid[] = "@(#)strcmp.c 5.5 (Berkeley) 01/26/91"; 13 #endif /* LIBC_SCCS and not lint */ 14 15 #include <sys/cdefs.h> 16 #include <string.h> 17 18 /* 19 * Compare strings. 20 */ 21 int 22 strcmp(s1, s2) 23 register const char *s1, *s2; 24 { 25 while (*s1 == *s2++) 26 if (*s1++ == 0) 27 return (0); 28 return (*(unsigned char *)s1 - *(unsigned char *)--s2); 29 } 30