1/* $NetBSD$ */ 2 3/*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Alan Barrett 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32/* 33 * ISO/IEC 9899:2011 section K.3.7.4.1 The memset_s function 34 */ 35 36#include <sys/cdefs.h> 37 38__RCSID("$NetBSD$"); 39 40#define __STDC_WANT_LIB_EXT1__ 1 41#include <errno.h> 42#include <stdint.h> 43#include <string.h> 44 45#undef memset_s /* in case it was defined as a macro */ 46#undef memset /* in case it was defined as a macro */ 47 48errno_t 49memset_s(void *s, rsize_t smax, int c, rsize_t n) 50{ 51 errno_t err = 0; 52 53 if (s == NULL) 54 return EINVAL; 55 if (smax > RSIZE_MAX) 56 return E2BIG; 57 58 if (n > RSIZE_MAX) { 59 err = E2BIG; 60 n = smax; 61 } 62 63 if (n > smax) { 64 err = EOVERFLOW; 65 n = smax; 66 } 67 68 memset(s, c, n); 69 70 return err; 71} 72