1 files changed, 119 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/util/regex/CharIndexedCharSequence.java b/libjava/classpath/gnu/java/util/regex/CharIndexedCharSequence.java
new file mode 100644
index 000000000..bc3cbbd1d
--- /dev/null
+++ b/libjava/classpath/gnu/java/util/regex/CharIndexedCharSequence.java
@@ -0,0 +1,119 @@
+/* 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.java.util.regex;
+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 boolean move1 (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;
+  }
+
+  private int rightmostTriedPosition = 0;
+  public void setHitEnd (REMatch match)
+  {
+    int pos = anchor + match.index;
+    if (pos > rightmostTriedPosition)
+      rightmostTriedPosition = pos;
+  }
+  public boolean hitEnd ()
+  {
+    return rightmostTriedPosition >= len;
+  }
+
+  public int getAnchor ()
+  {
+    return anchor;
+  }
+  public void setAnchor (int anchor)
+  {
+    this.anchor = anchor;
+  }
+
+}