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diff --git a/libjava/classpath/gnu/regexp/CharIndexedCharSequence.java b/libjava/classpath/gnu/regexp/CharIndexedCharSequence.java
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+/* gnu/regexp/CharIndexedCharSequence.java
+   Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath 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.
+
+GNU Classpath 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 GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.regexp;
+import java.io.Serializable;
+
+class CharIndexedCharSequence implements CharIndexed, Serializable {
+    private CharSequence s;
+    private int anchor;
+    private int len;
+    
+    CharIndexedCharSequence(CharSequence s, int index) {
+	this.s = s;
+	len = s.length();
+	anchor = index;
+    }
+
+    public char charAt(int index) {
+	int pos = anchor + index;
+	return ((pos < len) && (pos >= 0)) ? s.charAt(pos) : OUT_OF_BOUNDS;
+    }
+    
+    public boolean isValid() {
+	return (anchor < len);
+    }
+    
+    public boolean move(int index) {
+	return ((anchor += index) < len);
+    }
+
+    public CharIndexed lookBehind(int index, int length) {
+	if (length > (anchor + index)) length = anchor + index;
+	return new CharIndexedCharSequence(s, anchor + index - length);
+    }
+
+    public int length() {
+	return len - anchor;
+    }
+
+    private REMatch lastMatch;
+    public void setLastMatch(REMatch match) {
+	lastMatch = (REMatch)match.clone();
+	lastMatch.anchor = anchor;
+    }
+    public REMatch getLastMatch() { return lastMatch; }
+    public int getAnchor() { return anchor; }
+    public void setAnchor(int anchor) { this.anchor = anchor; }
+}