mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-25 07:28:20 +00:00
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/* realloc() function that is glibc compatible.
|
|
|
|
Copyright (C) 1997, 2003-2004, 2006-2007, 2009-2024 Free Software
|
|
Foundation, Inc.
|
|
|
|
This file 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 file 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;
|
|
}
|