/* * Copyright (c) 2012-2013 Apple Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * 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@ */ #include <stdlib.h> #include <string.h> #include "secure.h" size_t __strlcat_chk (char *restrict dest, char *restrict src, size_t len, size_t dstlen) { size_t initial_srclen; size_t initial_dstlen; if (__builtin_expect (dstlen < len, 0)) __chk_fail_overflow (); initial_srclen = strlen(src); initial_dstlen = strnlen(dest, len); if (initial_dstlen == len) return len+initial_srclen; if (initial_srclen < len - initial_dstlen) { __chk_overlap(dest, initial_srclen + initial_dstlen + 1, src, initial_srclen + 1); memcpy(dest+initial_dstlen, src, initial_srclen + 1); } else { __chk_overlap(dest, initial_srclen + initial_dstlen + 1, src, len - initial_dstlen - 1); memcpy(dest+initial_dstlen, src, len - initial_dstlen - 1); dest[len-1] = '\0'; } return initial_srclen + initial_dstlen; }