mirror of git://gcc.gnu.org/git/gcc.git
120 lines
3.2 KiB
Java
120 lines
3.2 KiB
Java
/* gnu/regexp/CharIndexedCharSequence.java
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Copyright (C) 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.util.regex;
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import java.io.Serializable;
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class CharIndexedCharSequence implements CharIndexed, Serializable
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{
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private CharSequence s;
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private int anchor;
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private int len;
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CharIndexedCharSequence (CharSequence s, int index)
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{
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this.s = s;
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len = s.length ();
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anchor = index;
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}
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public char charAt (int index)
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{
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int pos = anchor + index;
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return ((pos < len) && (pos >= 0)) ? s.charAt (pos) : OUT_OF_BOUNDS;
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}
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public boolean isValid ()
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{
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return (anchor < len);
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}
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public boolean move (int index)
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{
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return ((anchor += index) < len);
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}
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public boolean move1 (int index)
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{
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return ((anchor += index) <= len);
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}
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public CharIndexed lookBehind (int index, int length)
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{
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if (length > (anchor + index))
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length = anchor + index;
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return new CharIndexedCharSequence (s, anchor + index - length);
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}
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public int length ()
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{
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return len - anchor;
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}
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private REMatch lastMatch;
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public void setLastMatch (REMatch match)
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{
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lastMatch = (REMatch) match.clone ();
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lastMatch.anchor = anchor;
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}
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public REMatch getLastMatch ()
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{
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return lastMatch;
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}
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private int rightmostTriedPosition = 0;
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public void setHitEnd (REMatch match)
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{
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int pos = anchor + match.index;
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if (pos > rightmostTriedPosition)
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rightmostTriedPosition = pos;
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}
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public boolean hitEnd ()
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{
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return rightmostTriedPosition >= len;
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}
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public int getAnchor ()
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{
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return anchor;
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}
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public void setAnchor (int anchor)
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{
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this.anchor = anchor;
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}
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}
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