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Java > Open Source Codes > gnu > regexp > RETokenEnd


1 /*
2  * gnu/regexp/RETokenEnd.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 package gnu.regexp;
20
21 final class RETokenEnd extends REToken {
22     /**
23      * Indicates whether this token should match on a line break.
24      */
25   private String JavaDoc newline;
26
27   RETokenEnd(int subIndex,String JavaDoc newline) {
28     super(subIndex);
29     this.newline = newline;
30   }
31
32     boolean match(CharIndexed input, REMatch mymatch) {
33     char ch = input.charAt(mymatch.index);
34     if (ch == CharIndexed.OUT_OF_BOUNDS)
35         return ((mymatch.eflags & RE.REG_NOTEOL)>0) ?
36         false : next(input, mymatch);
37     if (newline != null) {
38         char z;
39         int i = 0; // position in newline
40 do {
41         z = newline.charAt(i);
42         if (ch != z) return false;
43         ++i;
44         ch = input.charAt(mymatch.index + i);
45         } while (i < newline.length());
46         
47         return next(input, mymatch);
48     }
49     return false;
50     }
51
52   void dump(StringBuffer JavaDoc os) {
53     os.append('$');
54   }
55 }
56
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