73 lines
2.4 KiB
Java
73 lines
2.4 KiB
Java
/* gnu/regexp/RETokenBackRef.java
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Copyright (C) 1998-2001, 2004 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.regexp;
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final class RETokenBackRef extends REToken {
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private int num;
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private boolean insens;
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RETokenBackRef(int subIndex, int num, boolean insens) {
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super(subIndex);
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this.num = num;
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this.insens = insens;
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}
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// should implement getMinimumLength() -- any ideas?
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boolean match(CharIndexed input, REMatch mymatch) {
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int b,e;
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b = mymatch.start[num];
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e = mymatch.end[num];
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if ((b==-1)||(e==-1)) return false; // this shouldn't happen, but...
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for (int i=b; i<e; i++) {
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if (input.charAt(mymatch.index+i-b) != input.charAt(i)) {
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return false;
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}
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}
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mymatch.index += e-b;
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return next(input, mymatch);
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}
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void dump(StringBuffer os) {
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os.append('\\').append(num);
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}
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}
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