/* Copyright (C) 2004 - 2005  db4objects Inc.  http://www.db4o.com

This file is part of the db4o open source object database.

db4o is free software; you can redistribute it and/or modify it under
the terms of version 2 of the GNU General Public License as published
by the Free Software Foundation and as clarified by db4objects' GPL 
interpretation policy, available at
http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
Suite 350, San Mateo, CA 94403, USA.

db4o 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. */
using System;

namespace com.db4o
{
	internal class YapDecimal : YapTypeIntegral
	{
        public YapDecimal(com.db4o.YapStream stream) : base(stream) {
        }

        public override int compare(Object o1, Object o2){
            return ((decimal)o2 > (decimal)o1) ? 1 : -1;
        }

        public override Object defaultValue(){
            return (decimal)0;
        }
      
        public override Object read(byte[] bytes, int offset){
            int[] ints = new int[4];
            offset += 3;
            for(int i = 0; i < 4; i ++){
                ints[i] = (bytes[offset] & 255 | (bytes[--offset] & 255) << 8 | (bytes[--offset] & 255) << 16 | bytes[--offset] << 24);
                offset +=7;
            }
            return new Decimal(ints);
        }

        public override int typeID(){
            return 21;
        }
      
        public override void write(Object obj, byte[] bytes, int offset){
            decimal dec = (decimal)obj;
            int[] ints = Decimal.GetBits(dec);
            offset += 4;
            for(int i = 0; i < 4; i ++){
                bytes[--offset] = (byte)ints[i];
                bytes[--offset] = (byte)(ints[i] >>= 8);
                bytes[--offset] = (byte)(ints[i] >>= 8);
                bytes[--offset] = (byte)(ints[i] >>= 8);
                offset += 8;
            }
        }
    }
}
