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/* memset_s.c
*
* Copyright 2024 axtlos <axtlos@disroot.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: LGPL-3.0-only
*/
#define __STDC_WANT_LIB_EXT1__ 1
#include "extlib.h"
#include <errno.h>
errno_t
memset_s(void *s, rsize_t smax, int c, rsize_t n)
{
volatile unsigned char *dest = (unsigned char *) s;
errno_t ret = EINVAL;
rsize_t limit = n < smax ? n : smax;
if (!s)
throw_constraint_handler_s("memset_s: s = NULL", ret);
else if (n > RSIZE_MAX)
throw_constraint_handler_s("memset_s: n > RSIZE_MAX", ret);
else if (smax > RSIZE_MAX)
throw_constraint_handler_s("memset_s: smax > RSIZE_MAX", ret);
else if (n > smax)
throw_constraint_handler_s("memset_s: n > smax", ret);
else {
while (limit > 0)
dest[--limit] = (unsigned char)c;
ret = 0;
}
return ret;
}
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