--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/software/eXist/mpdl-modules/src/org/exist/xquery/modules/mpdltext/EncodeBig5.java	Wed Nov 24 17:24:23 2010 +0100
@@ -0,0 +1,81 @@
+/*
+ *  eXist Open Source Native XML Database: Extension module
+ *  Copyright (C) 2008 Josef Willenborg
+ *  jwillenborg@mpiwg-berlin.mpg.de
+ *  http://www.mpiwg-berlin.mpg.de
+ *  
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  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 Lesser General Public License for more details.
+ *  
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *  
+ *  $Id: TextModule.java $
+ */
+package org.exist.xquery.modules.mpdltext;
+
+import java.io.UnsupportedEncodingException;
+
+import org.exist.dom.QName;
+import org.exist.xquery.BasicFunction;
+import org.exist.xquery.Cardinality;
+import org.exist.xquery.FunctionSignature;
+import org.exist.xquery.XPathException;
+import org.exist.xquery.XQueryContext;
+import org.exist.xquery.value.Sequence;
+import org.exist.xquery.value.SequenceType;
+import org.exist.xquery.value.StringValue;
+import org.exist.xquery.value.Type;
+import org.exist.xquery.value.ValueSequence;
+
+public class EncodeBig5 extends BasicFunction {
+
+	public final static FunctionSignature signature =
+		new FunctionSignature(
+			new QName("encode-big5", MPDLTextModule.NAMESPACE_URI, MPDLTextModule.PREFIX),
+			"A function which delivers an encoded translation of the big5 input string",
+			new SequenceType[] { new SequenceType(Type.STRING, Cardinality.ZERO_OR_MORE) },
+			new SequenceType(Type.STRING, Cardinality.ZERO_OR_MORE));
+
+	public EncodeBig5(XQueryContext context) {
+		super(context, signature);
+	}
+
+	public Sequence eval(Sequence[] args, Sequence contextSequence) throws XPathException {
+	  Sequence seqBig5InputStr = args[0];
+    String big5InputStr = "";
+    String charset = "big5";
+		if (seqBig5InputStr.isEmpty())
+			return Sequence.EMPTY_SEQUENCE;
+		else
+		  big5InputStr = seqBig5InputStr.getStringValue();
+		ValueSequence result = null;
+    String resultStr = "";
+    try {
+      byte[] resultBytes = big5InputStr.getBytes(charset);
+      for (int i=0; i < resultBytes.length; i++) {
+        byte b = resultBytes[i];
+        int unsigned = unsignedByteToInt(b);
+        String hexStr = Integer.toHexString(unsigned);
+        resultStr = resultStr + "%" + hexStr;
+      }
+      result = new ValueSequence();
+      result.add(new StringValue(resultStr));
+    } catch (UnsupportedEncodingException e) {
+      
+    }
+		return result;
+	}
+
+  private int unsignedByteToInt(byte b) {
+    return (int) b & 0xFF;
+  }
+}