/* *  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('^');    }}