1/* 2 * Copyright (c) 2011 Apple, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23 24#include <strings.h> 25 26size_t 27strlcat(char * restrict dst, const char * restrict src, size_t maxlen) { 28 const size_t srclen = strlen(src); 29 const size_t dstlen = strnlen(dst, maxlen); 30 if (dstlen == maxlen) return maxlen+srclen; 31 if (srclen < maxlen-dstlen) { 32 memcpy(dst+dstlen, src, srclen+1); 33 } else { 34 memcpy(dst+dstlen, src, maxlen-dstlen-1); 35 dst[maxlen-1] = '\0'; 36 } 37 return dstlen + srclen; 38} 39