| /* realloc() function that is glibc compatible. |
| |
| Copyright (C) 1997, 2003-2004, 2006-2007, 2009-2022 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; |
| } |