1 files changed, 64 insertions, 0 deletions
diff --git a/lib/xmalloca.h b/lib/xmalloca.h
new file mode 100644
index 0000000..2f7567d
--- /dev/null
+++ b/lib/xmalloca.h
@@ -0,0 +1,64 @@
+/* Safe automatic memory allocation with out of memory checking.
+   Copyright (C) 2003, 2005, 2007, 2009-2013 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 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
+   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, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef _XMALLOCA_H
+#define _XMALLOCA_H
+
+#include "malloca.h"
+#include "xalloc.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 freea() 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
+
+/* xnmalloca(N,S) is an overflow-safe variant of xmalloca (N * S).
+   It allocates an array of N objects, each with S bytes of memory,
+   on the stack.  S must be positive and N must be nonnegative.
+   The array must be freed using freea() before the function returns.
+   Upon failure, it exits with an error message.  */
+#if HAVE_ALLOCA
+/* Rely on xmalloca (SIZE_MAX) calling xalloc_die ().  */
+# define xnmalloca(n, s) \
+    xmalloca (xalloc_oversized ((n), (s)) ? (size_t) (-1) : (n) * (s))
+#else
+# define xnmalloca(n, s) \
+    xnmalloc ((n), (s))
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* _XMALLOCA_H */