| /* gnu/regexp/RETokenStart.java |
| Copyright (C) 1998-2001, 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| 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('^'); |
| } |
| } |