retokenend.java

来自「用java 编写的源码开放的文本编辑器。有很多有用的特性」· Java 代码 · 共 56 行

/*
 *  gnu/regexp/RETokenEnd.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;

final class RETokenEnd extends REToken {
    /**
     * Indicates whether this token should match on a line break.
     */
  private String newline;

  RETokenEnd(int subIndex,String newline) { 
    super(subIndex);
    this.newline = newline;
  }

    boolean match(CharIndexed input, REMatch mymatch) {
	char ch = input.charAt(mymatch.index);
	if (ch == CharIndexed.OUT_OF_BOUNDS)
	    return ((mymatch.eflags & RE.REG_NOTEOL)>0) ? 
		false : next(input, mymatch);
	if (newline != null) {
	    char z;
	    int i = 0; // position in newline
	    do {
		z = newline.charAt(i);
		if (ch != z) return false;
		++i;
		ch = input.charAt(mymatch.index + i);
	    } while (i < newline.length());
	    
	    return next(input, mymatch);
	}
	return false;
    }

  void dump(StringBuffer os) {
    os.append('$');
  }
}