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Java > Open Source Codes > gnu > regexp > RETokenRange


1 /*
2  * gnu/regexp/RETokenRange.java
3  * Copyright (C) 1998-2001 Wes Biggs
4  *
5  * This library is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU Lesser General Public License as published
7  * by the Free Software Foundation; either version 2.1 of the License, or
8  * (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18  */
19
20 package gnu.regexp;
21
22 final class RETokenRange extends REToken {
23   private char lo, hi;
24   private boolean insens;
25
26   RETokenRange(int subIndex, char lo, char hi, boolean ins) {
27     super(subIndex);
28     this.lo = (insens = ins) ? Character.toLowerCase(lo) : lo;
29     this.hi = ins ? Character.toLowerCase(hi) : hi;
30   }
31
32   int getMinimumLength() {
33     return 1;
34   }
35
36     boolean match(CharIndexed input, REMatch mymatch) {
37     char c = input.charAt(mymatch.index);
38     if (c == CharIndexed.OUT_OF_BOUNDS) return false;
39     if (insens) c = Character.toLowerCase(c);
40     if ((c >= lo) && (c <= hi)) {
41         ++mymatch.index;
42         return next(input, mymatch);
43     }
44     return false;
45     }
46     
47   void dump(StringBuffer JavaDoc os) {
48     os.append(lo).append('-').append(hi);
49   }
50 }
51
52
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