/jEdit/tags/jedit-4-2-pre4/gnu/regexp/RETokenStart.java
Java | 69 lines | 39 code | 9 blank | 21 comment | 13 complexity | ee80d04c88ac16f03bbb6550d160df72 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
- /*
- * gnu/regexp/RETokenStart.java
- * Copyright (C) 1998-2001 Wes Biggs
- *
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library 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 Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- package gnu.regexp;
- class RETokenStart extends REToken {
- private String newline; // matches after a newline
-
- RETokenStart(int subIndex, String newline) {
- super(subIndex);
- this.newline = newline;
- }
-
- boolean match(CharIndexed input, REMatch mymatch) {
- // charAt(index-n) may be unknown on a Reader/InputStream. FIXME
- // Match after a newline if in multiline mode
-
- if (newline != null) {
- int len = newline.length();
- if (mymatch.offset >= len) {
- boolean found = true;
- char z;
- int i = 0; // position in REToken.newline
- char ch = input.charAt(mymatch.index - len);
- do {
- z = newline.charAt(i);
- if (ch != z) {
- found = false;
- break;
- }
- ++i;
- ch = input.charAt(mymatch.index - len + i);
- } while (i < len);
-
- if (found) return next(input, mymatch);
- }
- }
-
- // Don't match at all if REG_NOTBOL is set.
- if ((mymatch.eflags & RE.REG_NOTBOL) > 0) return false;
-
- if ((mymatch.eflags & RE.REG_ANCHORINDEX) > 0)
- return (mymatch.anchor == mymatch.offset) ?
- next(input, mymatch) : false;
- else
- return ((mymatch.index == 0) && (mymatch.offset == 0)) ?
- next(input, mymatch) : false;
- }
-
- void dump(StringBuffer os) {
- os.append('^');
- }
- }