1262445Serwin/* 2262445Serwin * Copyright (C) 2013 Internet Systems Consortium, Inc. ("ISC") 3262445Serwin * 4262445Serwin * Permission to use, copy, modify, and/or distribute this software for any 5262445Serwin * purpose with or without fee is hereby granted, provided that the above 6262445Serwin * copyright notice and this permission notice appear in all copies. 7262445Serwin * 8262445Serwin * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 9262445Serwin * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 10262445Serwin * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 11262445Serwin * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 12262445Serwin * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 13262445Serwin * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 14262445Serwin * PERFORMANCE OF THIS SOFTWARE. 15262445Serwin */ 16262445Serwin 17262445Serwin/* $Id$ */ 18262445Serwin 19262445Serwin/*! \file */ 20262445Serwin 21262445Serwin#include <config.h> 22262445Serwin 23262445Serwin#include <isc/safe.h> 24262445Serwin#include <isc/util.h> 25262445Serwin 26262445Serwin#ifdef _MSC_VER 27262445Serwin#pragma optimize("", off) 28262445Serwin#endif 29262445Serwin 30262445Serwinisc_boolean_t 31262445Serwinisc_safe_memcmp(const void *s1, const void *s2, size_t n) { 32262445Serwin isc_uint8_t acc = 0; 33262445Serwin 34262445Serwin if (n != 0U) { 35262445Serwin const isc_uint8_t *p1 = s1, *p2 = s2; 36262445Serwin 37262445Serwin do { 38262445Serwin acc |= *p1++ ^ *p2++; 39262445Serwin } while (--n != 0U); 40262445Serwin } 41262445Serwin return (ISC_TF(acc == 0)); 42262445Serwin} 43