/*********************************************************************
*
* Copyright (C) 2006 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 jxl.biff.formula;
import jxl.biff.IntegerHelper;
/**
* An error constant
*/
class ErrorConstant extends Operand implements ParsedThing
{
/**
* The error
*/
private FormulaErrorCode error;
/**
* Constructor
*/
public ErrorConstant()
{
}
/**
* Constructor
*
* @param s the error constant
*/
public ErrorConstant(String s)
{
error = FormulaErrorCode.getErrorCode(s);
}
/**
* 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)
{
int code = data[pos];
error = FormulaErrorCode.getErrorCode(code);
return 1;
}
/**
* Gets the token representation of this item in RPN
*
* @return the bytes applicable to this formula
*/
byte[] getBytes()
{
byte[] data = new byte[2];
data[0] = Token.ERR.getCode();
data[1] = (byte) error.getCode();
return data;
}
/**
* Abstract method implementation to get the string equivalent of this
* token
*
* @param buf the string to append to
*/
public void getString(StringBuffer buf)
{
buf.append(error.getDescription());
}
/**
* If this formula was on an imported sheet, check that
* cell references to another sheet are warned appropriately
* Does nothing
*/
void handleImportedCellReferences()
{
}
}
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