--- /dev/null
+/* Safe automatic memory allocation with out of memory checking.
+ Copyright (C) 2003, 2005, 2007 Free Software Foundation, Inc.
+ Written by Bruno Haible <bruno@clisp.org>, 2003.
+
+ 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.
+
+ 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 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#ifndef _XMALLOCA_H
+#define _XMALLOCA_H
+
+#include "malloca.h"
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* xmalloca(N) is a checking safe variant of alloca(N). It allocates N bytes
+ of memory allocated on the stack, that must be freed using freesa() before
+ the function returns. Upon failure, it exits with an error message. */
+#if HAVE_ALLOCA
+# define xmalloca(N) \
+ ((N) < 4032 - sa_increment \
+ ? (void *) ((char *) alloca ((N) + sa_increment) + sa_increment) \
+ : xmmalloca (N))
+extern void * xmmalloca (size_t n);
+#else
+# define xmalloca(N) \
+ xmalloc (N)
+#endif
+
+/* Maybe we should also define a variant
+ xnmalloca (size_t n, size_t s) - behaves like xmalloca (n * s)
+ If this would be useful in your application. please speak up. */
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* _XMALLOCA_H */