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/*
* Copyright (c) 2017 Juniper Networks. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Copyright 2018 Nexenta Systems, Inc.
*/
#define __STDC_WANT_LIB_EXT1__ 1
#include "lint.h"
#include <errno.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include "libc.h"
/* __memset_vp is a volatile pointer to memset() function */
static void *(*const volatile __memset_vp)(void *, int, size_t) = (memset);
/* ISO/IEC 9899:2011 K.3.7.4.1 */
errno_t
memset_s(void *s, rsize_t smax, int c, rsize_t n)
{
errno_t ret;
rsize_t lim;
unsigned char v;
ret = EINVAL;
lim = n < smax ? n : smax;
v = (unsigned char)c;
if (s == NULL) {
__throw_constraint_handler_s("memset_s: s is NULL", ret);
} else if (smax > RSIZE_MAX) {
__throw_constraint_handler_s("memset_s: smax > RSIZE_MAX",
ret);
} else {
/*
* Both s and smax are valid, fill the memory buffer using
* memset() called through a volatile pointer to guarantee
* it will not be optimized away.
*/
(void) (*__memset_vp)(s, v, lim);
if (n > RSIZE_MAX) {
__throw_constraint_handler_s("memset_s: n > RSIZE_MAX",
ret);
} else if (n > smax) {
__throw_constraint_handler_s("memset_s: n > smax", ret);
} else {
ret = 0;
}
}
return (ret);
}
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