/*********************************************************************
 *
 *      Copyright (C) 2007 Andrew Khan
 *
 * 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 library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 ***************************************************************************/

package org.xbib.datastructures.xslx.jxl.biff.formula;

import org.xbib.datastructures.xslx.jxl.biff.IntegerHelper;

/**
 * Indicates that the function doesn't evaluate to a constant reference
 */
class MemArea extends SubExpression {
    /**
     * Constructor
     */
    public MemArea() {
    }

    public void getString(StringBuffer buf) {
        ParseItem[] subExpression = getSubExpression();

        if (subExpression.length == 1) {
            subExpression[0].getString(buf);
        } else if (subExpression.length == 2) {
            subExpression[1].getString(buf);
            buf.append(':');
            subExpression[0].getString(buf);
        }
    }

    /**
     * Reads the ptg data from the array starting at the specified position
     *
     * @param data the RPN array
     * @param pos  the current position in the array, excluding the ptg identifier
     * @return the number of bytes read
     */
    public int read(byte[] data, int pos) {
        // For mem areas, the first four bytes are not used
        setLength(IntegerHelper.getInt(data[pos + 4], data[pos + 5]));
        return 6;
    }

    /**
     * If this formula was on an imported sheet, check that
     * cell references to another sheet are warned appropriately
     * Does nothing
     */
    void handleImportedCellReferences() {
    }
}

