-/* Work around bug on some systems where realloc (NULL, n) fails.
- Copyright (C) 1997 Free Software Foundation, Inc.
+/* realloc() function that is glibc compatible.
- This program is free software; you can redistribute it and/or modify
+ Copyright (C) 1997, 2003, 2004, 2006, 2007 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 2, or (at your option)
- any later version.
+ the Free Software Foundation; either version 3 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
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
-/* written by Jim Meyering */
+/* written by Jim Meyering and Bruno Haible */
-#if HAVE_CONFIG_H
-# include <config.h>
+#include <config.h>
+/* Only the AC_FUNC_REALLOC macro defines 'realloc' already in config.h. */
+#ifdef realloc
+# define NEED_REALLOC_GNU
+# undef realloc
#endif
-#undef realloc
-#include <sys/types.h>
+/* Specification. */
+#include <stdlib.h>
+
+#include <errno.h>
-char *realloc ();
+/* Call the system's malloc and realloc below. */
+#undef malloc
+#undef realloc
/* Change the size of an allocated block of memory P to N bytes,
- with error checking. If P is NULL, use malloc. */
+ with error checking. If N is zero, change it to 1. If P is NULL,
+ use malloc. */
-char *
-rpl_realloc (p, n)
- char *p;
- size_t n;
+void *
+rpl_realloc (void *p, size_t n)
{
- if (p == 0)
- return malloc (n);
- return realloc (p, n);
+ void *result;
+
+#ifdef 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;
+ }
+#endif
+
+ result = (p == NULL ? malloc (n) : realloc (p, n));
+
+#if !HAVE_REALLOC_POSIX
+ if (result == NULL)
+ errno = ENOMEM;
+#endif
+
+ return result;
}