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/*
========== licence begin GPL
Copyright (C) 2002-2003 SAP AG
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.
========== licence end
*/
package com.sap.dbtech.util;
/**
*
*/
public class FullswapMem
extends StructuredBytes
{
/**
* FullswapMem constructor comment.
* @param data byte[]
*/
public FullswapMem(byte[] data) {
super(data);
}
/**
* FullswapMem constructor comment.
* @param data byte[]
* @param offset int
*/
public FullswapMem(byte[] data, int offset) {
super(data, offset);
}
/**
* FullswapMem constructor comment.
* @param size int
*/
public FullswapMem(int size) {
super(size);
}
/**
* Read a signed two byte integer from <i>offset</i>
* @return int
* @param offset int
*/
public int
getInt2 (
int offset)
{
int result;
int lowerByte;
lowerByte = this.data [offset + this.ptrOffs];
if (lowerByte < 0) {
lowerByte += 256;
}
result = (this.data [offset + this.ptrOffs + 1] * 256) + lowerByte;
return result;
}
/**
* Read a signed four byte integer from <i>offset</i>
* @return int
* @param offset int
*/
public int
getInt4 (
int offset)
{
byte[] d=this.data;
int result = 0;
int oneByte;
int ofs=offset + this.ptrOffs;
for (int i = 3; i >= 0; --i) {
oneByte = d [ofs + i];
if (oneByte < 0) {
oneByte += 256;
}
result = (result * 256) + oneByte;
}
return result;
}
/**
* Write a signed two byte inter at <i>offset</i>
* @param value int
* @param offset int
*/
public void
putInt2 (
int value,
int offset)
{
this.data [offset + this.ptrOffs + 1] = (byte) (value / 256);
this.data [offset + this.ptrOffs] = (byte)(value % 256);
return;
}
/**
* Write a signed four byte integer at <i>offset</i>
* @param value int
* @param offset int
*/
public void
putInt4 (
int value,
int offset)
{
offset += this.ptrOffs;
for (int i = 0; i <3; ++i) {
this.data [offset + i] = (byte) (value % 256);
value = value / 256;
}
this.data [offset + 3] = (byte) value;
return;
}
}
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