/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* Copyright (c) 1992, 1997 NeXT Software, Inc. All rights reserved. * * File: libc/gen/ppc/strncmp.c * * This file contains machine dependent code for string comparison * * HISTORY * 24-Jan-1997 Umesh Vaishampayan (umeshv@NeXT.com) * Ported to PPC. * 24-Nov-92 Derek B Clegg (dclegg@next.com) * Created. */ #import <string.h> /* This routine should be optimized. */ /* ANSI sez: * The `strncmp' function compares not more than `n' characters (characters * that follow a null character are not compared) from the array pointed to * by `s1' to the array pointed to by `s2'. * The `strncmp' function returns an integer greater than, equal to, or less * than zero, according as the possibly null-terminated array pointed to by * `s1' is greater than, equal to, or less than the possibly null-terminated * array pointed to by `s2'. [4.11.4.4] */ int strncmp(const char *s1, const char *s2, size_t n) { for ( ; n > 0; s1++, s2++, --n) if (*s1 != *s2) return ((*(unsigned char *)s1 < *(unsigned char *)s2) ? -1 : +1); else if (*s1 == '\0') return 0; return 0; }