PageRenderTime 41ms CodeModel.GetById 14ms RepoModel.GetById 0ms app.codeStats 0ms

/jEdit/tags/jedit-4-2-pre14/gnu/regexp/CharIndexedStringBuffer.java

#
Java | 43 lines | 20 code | 5 blank | 18 comment | 1 complexity | 15d52a6b44063b997b602896440aa751 MD5 | raw file
Possible License(s): BSD-3-Clause, AGPL-1.0, Apache-2.0, LGPL-2.0, LGPL-3.0, GPL-2.0, CC-BY-SA-3.0, LGPL-2.1, GPL-3.0, MPL-2.0-no-copyleft-exception, IPL-1.0
  1. /*
  2. * gnu/regexp/CharIndexedStringBuffer.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. import java.io.Serializable;
  21. class CharIndexedStringBuffer implements CharIndexed, Serializable {
  22. private StringBuffer s;
  23. private int anchor;
  24. CharIndexedStringBuffer(StringBuffer str, int index) {
  25. s = str;
  26. anchor = index;
  27. }
  28. public char charAt(int index) {
  29. int pos = anchor + index;
  30. return ((pos < s.length()) && (pos >= 0)) ? s.charAt(pos) : OUT_OF_BOUNDS;
  31. }
  32. public boolean isValid() {
  33. return (anchor < s.length());
  34. }
  35. public boolean move(int index) {
  36. return ((anchor += index) < s.length());
  37. }
  38. }