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/* Change the size of an allocated block.
Copyright (C) 2017-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library 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; either version 2.1 of the
License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, see <https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <stdlib.h>
#include <malloc.h>
void *
__libc_reallocarray (void *optr, size_t nmemb, size_t elem_size)
{
size_t bytes;
if (__builtin_mul_overflow (nmemb, elem_size, &bytes))
{
__set_errno (ENOMEM);
return 0;
}
return realloc (optr, bytes);
}
libc_hidden_def (__libc_reallocarray)
weak_alias (__libc_reallocarray, reallocarray)
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