/* * Copyright (c) 1989 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that: (1) source distributions retain this entire copyright * notice and comment, and (2) distributions including binaries display * the following acknowledgement: ``This product includes software * developed by the University of California, Berkeley and its contributors'' * in the documentation or other materials provided with the distribution * and in all advertising materials mentioning features or use of this * software. Neither the name of the University nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)strncmp.c 5.5 (Berkeley) 6/1/90"; #endif /* LIBC_SCCS and not lint */ #include <sys/stdc.h> #include <string.h> int strncmp(s1, s2, n) register const char *s1, *s2; register size_t n; { if (n == 0) return (0); do { if (*s1 != *s2++) return (*(unsigned char *)s1 - *(unsigned char *)--s2); if (*s1++ == 0) break; } while (--n != 0); return (0); }