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Diffstat (limited to 'libjava/gnu/regexp/RETokenBackRef.java')
| -rw-r--r-- | libjava/gnu/regexp/RETokenBackRef.java | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/libjava/gnu/regexp/RETokenBackRef.java b/libjava/gnu/regexp/RETokenBackRef.java new file mode 100644 index 0000000..a811e16 --- /dev/null +++ b/libjava/gnu/regexp/RETokenBackRef.java @@ -0,0 +1,72 @@ +/* gnu/regexp/RETokenBackRef.java + Copyright (C) 1998-2001, 2004 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., 59 Temple Place, Suite 330, Boston, MA +02111-1307 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; + +final class RETokenBackRef extends REToken { + private int num; + private boolean insens; + + RETokenBackRef(int subIndex, int num, boolean insens) { + super(subIndex); + this.num = num; + this.insens = insens; + } + + // should implement getMinimumLength() -- any ideas? + + boolean match(CharIndexed input, REMatch mymatch) { + int b,e; + b = mymatch.start[num]; + e = mymatch.end[num]; + if ((b==-1)||(e==-1)) return false; // this shouldn't happen, but... + for (int i=b; i<e; i++) { + if (input.charAt(mymatch.index+i-b) != input.charAt(i)) { + return false; + } + } + mymatch.index += e-b; + return next(input, mymatch); + } + + void dump(StringBuffer os) { + os.append('\\').append(num); + } +} + + |