diff options
Diffstat (limited to 'lib/realloc.c')
| -rw-r--r-- | lib/realloc.c | 66 |
1 files changed, 25 insertions, 41 deletions
diff --git a/lib/realloc.c b/lib/realloc.c index 35caeab7ed..0573139625 100644 --- a/lib/realloc.c +++ b/lib/realloc.c @@ -1,76 +1,60 @@ /* realloc() function that is glibc compatible. - Copyright (C) 1997, 2003-2004, 2006-2007, 2009-2021 Free Software + Copyright (C) 1997, 2003-2004, 2006-2007, 2009-2024 Free Software Foundation, Inc. - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. + 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 program is distributed in the hope that it will be useful, + 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 General Public License for more details. + GNU Lesser General Public License for more details. - You should have received a copy of the GNU General Public License + 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 */ -#define _GL_USE_STDLIB_ALLOC 1 #include <config.h> -/* Only the AC_FUNC_REALLOC macro defines 'realloc' already in config.h. */ -#ifdef realloc -# define NEED_REALLOC_GNU 1 -/* Whereas the gnulib module 'realloc-gnu' defines HAVE_REALLOC_GNU. */ -#elif GNULIB_REALLOC_GNU && !HAVE_REALLOC_GNU -# define NEED_REALLOC_GNU 1 -#endif - -/* Infer the properties of the system's malloc function. - The gnulib module 'malloc-gnu' defines HAVE_MALLOC_GNU. */ -#if GNULIB_MALLOC_GNU && HAVE_MALLOC_GNU -# define SYSTEM_MALLOC_GLIBC_COMPATIBLE 1 -#endif - #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 N is zero, change it to 1. If P is NULL, - use malloc. */ + 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) { - void *result; + if (p == NULL) + return malloc (n); -#if NEED_REALLOC_GNU if (n == 0) { - n = 1; - - /* In theory realloc might fail, so don't rely on it to free. */ free (p); - p = NULL; + return NULL; } -#endif - if (p == NULL) + if (xalloc_oversized (n, 1)) { -#if GNULIB_REALLOC_GNU && !NEED_REALLOC_GNU && !SYSTEM_MALLOC_GLIBC_COMPATIBLE - if (n == 0) - n = 1; -#endif - result = malloc (n); + errno = ENOMEM; + return NULL; } - else - result = realloc (p, n); -#if !HAVE_REALLOC_POSIX + void *result = realloc (p, n); + +#if !HAVE_MALLOC_POSIX if (result == NULL) errno = ENOMEM; #endif |