--- /dev/null
+/******************************************************************************
+ * Copyright (c) 2004, 2008 IBM Corporation
+ * All rights reserved.
+ * This program and the accompanying materials
+ * are made available under the terms of the BSD License
+ * which accompanies this distribution, and is available at
+ * http://www.opensource.org/licenses/bsd-license.php
+ *
+ * Contributors:
+ * IBM Corporation - initial implementation
+ *****************************************************************************/
+
+#include <ctype.h>
+
+int isxdigit(int ch)
+{
+ return (
+ (ch >= '0' && ch <= '9') |
+ (ch >= 'A' && ch <= 'F') |
+ (ch >= 'a' && ch <= 'f') );
+}