strncat.c   [plain text]


/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This 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 OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1991, 1997 NeXT Software, Inc.  All rights reserved.
 * 
 *	File:	libc/gen/ppc/strncat.c
 *	Author: Mike DeMoney, NeXT Software, Inc.
 *
 *	This file contains machine dependent code for string copy
 *
 * HISTORY
 *  24-Jan-1997 Umesh Vaishampayan (umeshv@NeXT.com)
 *	Ported to PPC.
 * 23-Nov-92  Derek B Clegg (dclegg@next.com)
 *	Ported to m98k.
 *  4-Jun-91  Mike DeMoney (mike@next.com)
 *	Created.
 */
#import	<string.h>

char *
strncat(char *s1, const char *s2, size_t n)
{
    unsigned len1 = strlen(s1);
    unsigned len2 = strlen(s2);
    
    if (len2 < n) {
	strcpy(&s1[len1], s2);
    } else {
	strncpy(&s1[len1], s2, n);
	s1[len1 + n] = '\0';
    }
    return s1;
}