longatom.java

类似于Windows上的Excel

/*
 * MC2 -- j2me spreadsheet
 *
 * Copyright (c) 2004-2006 Michael Zemljanukha ([e-mail])
 *
 * This program 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 of the License, or (at your option)
 * any later version.
 *
 * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

package com.wapindustrial.calc;

import ral.Real;

public class LongAtom extends LispObject  {
    public static final LongAtom ZERO = new LongAtom( 0 );
    public long value;
//    public LongAtom( ) {}           // zero
    public LongAtom( long value ) {
        this.value = value;
    }
    public void toBuffer( StringBuffer sb ) {
        sb.append( Long.toString( value ) );
        sb.append( 'L' );
    }
    public void toJavaBuffer( StringBuffer sb, int ident, FunctorList parent ) {
        addIdent( sb, ident );
        sb.append( "new LongAtom(" );
        sb.append( Long.toString( value ) );
        sb.append( "L) " );
    }
    public LispObject convertToType( int type ) throws EvaluateException {
        LispObject rez = this;
        switch( type ) {
            case TYPE_LONG:
                break;
            case TYPE_FLOAT:
                rez = FloatAtom.convertFromLong( value );
                break;
	    case TYPE_DATE:
		Real tmp = new Real( value );  
		tmp.div(3600000);               // from millisec to hours
		tmp.add(17268672);              // add 01.01.1970 00:00
		tmp.toDHMS();                   // convert to DHMS
		rez = new DateAtom( tmp );     
		break;
            default:    // to STRING
                return super.convertToType( type );
        }
        return rez;
    }
	/* (non-Javadoc)
	 * @see com.wapindustrial.calc.LispObject#typeNumber()
	 */
	public int typeNumber() {
		return TYPE_LONG;
	}
}