2 * gnu/regexp/CharIndexedStringBuffer.java
3 * Copyright (C) 1998-2001 Wes Biggs
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.
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.
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.
20 import java.io.Serializable;
22 class CharIndexedStringBuffer implements CharIndexed, Serializable {
23 private StringBuffer s;
26 CharIndexedStringBuffer(StringBuffer str, int index) {
31 public char charAt(int index) {
32 int pos = anchor + index;
33 return ((pos < s.length()) && (pos >= 0)) ? s.charAt(pos) : OUT_OF_BOUNDS;
36 public boolean isValid() {
37 return (anchor < s.length());
40 public boolean move(int index) {
41 return ((anchor += index) < s.length());