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/* realloc() function that is glibc compatible.
Copyright (C) 1997, 2003-2004, 2006-2007, 2009-2021 Free Software
Foundation, Inc.
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; either version 2.1 of the License, or
(at your option) any later version.
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 Lesser 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/>. */
/* written by Jim Meyering and Bruno Haible */
#include <config.h>
#include <stdlib.h>
#include <errno.h>
#include "xalloc-oversized.h"
/* Call the system's realloc below. This file does not define
_GL_USE_STDLIB_ALLOC because it needs Gnulib's malloc if present. */
#undef realloc
/* Change the size of an allocated block of memory P to N bytes,
with error checking. If P is NULL, use malloc. Otherwise if N is zero,
free P and return NULL. */
void *
rpl_realloc (void *p, size_t n)
{
if (p == NULL)
return malloc (n);
if (n == 0)
{
free (p);
return NULL;
}
if (xalloc_oversized (n, 1))
{
errno = ENOMEM;
return NULL;
}
void *result = realloc (p, n);
#if !HAVE_MALLOC_POSIX
if (result == NULL)
errno = ENOMEM;
#endif
return result;
}
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