checkpoint

1 files changed, 54 insertions, 0 deletions

diff --git a/lib/xrealloc.c b/lib/xrealloc.c
new file mode 100644
index 0000000..c479b98
--- /dev/null
+++ b/lib/xrealloc.c
@@ -0,0 +1,54 @@
+/* xrealloc.c: realloc with error checking.
+
+Copyright (C) 1992, 93 Free Software Foundation, Inc.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+This library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+/* Don't include config.h or all our other usual includes, since
+   it's useful to just throw this file into other programs.  */
+
+#include <stdio.h>
+extern char *realloc ();
+
+
+extern void *xmalloc ();
+
+void *
+xrealloc (old_ptr, size)
+    void *old_ptr;
+    unsigned size;
+{
+  void *new_mem;
+
+  if (old_ptr == NULL)
+    new_mem = xmalloc (size);
+  else
+    {
+      new_mem = (void *) realloc (old_ptr, size);
+      if (new_mem == NULL)
+        {
+          /* We used to print OLD_PTR here using %x, and casting its
+             value to unsigned, but that lost on the Alpha, where
+             pointers and unsigned had different sizes.  Since the info
+             is of little or no value anyway, just don't print it.  */
+          fprintf (stderr, "fatal: memory exhausted (realloc of %u bytes).\n",
+                   size);
+          /* 1 means success on VMS, so pick a random number (ASCII `B').  */
+          exit (66);
+        }
+    }
+
+  return new_mem;
+}