/*
* Copyright 2004,2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.bsf.util.event.generator;
/**
* Byte handling utilities
*
* 5 April 1999 - functions to append standard types to byte arrays
* functions to produce standard types from byte arrays
*
* @author Richard F. Boehme
*
*/
public class ByteUtility
{
public static byte[] addBytes(byte[] array,byte[] value)
{
if( null != array )
{
byte newarray[] = new byte[array.length + value.length];
System.arraycopy(array,0,newarray,0,array.length);
System.arraycopy(value,0,newarray,array.length,value.length);
array = newarray;
}
else
{
array = value;
}
return array;
}
public static byte[] addBytes(byte[] array, byte value)
{
if( null != array )
{
byte newarray[] = new byte[array.length + 1];
System.arraycopy(array,0,newarray,0,array.length);
newarray[newarray.length-1] = value;
array = newarray;
}
else
{
array = new byte[1];
array[0] = value;
}
return array;
}
public static byte[] addBytes(byte[] array, int value)
{
if( null != array )
{
byte newarray[] = new byte[array.length + 3];
System.arraycopy(array,0,newarray,0,array.length);
newarray[newarray.length-3] = (byte) (( value >> 16 ) & 0xFF);
newarray[newarray.length-2] = (byte) (( value >> 8 ) & 0xFF);
newarray[newarray.length-1] = (byte) ( value & 0xFF);
array = newarray;
}
else
{
array = new byte[3];
array[0] = (byte) (( value >> 16 ) & 0xFF);
array[1] = (byte) (( value >> 8 ) & 0xFF);
array[2] = (byte) ( value & 0xFF);
}
return array;
}
public static byte[] addBytes(byte[] array, long value)
{
if( null != array )
{
byte newarray[] = new byte[array.length + 4];
System.arraycopy(array,0,newarray,0,array.length);
newarray[newarray.length-4] = (byte) (( value >> 24 ) & 0xFF);
newarray[newarray.length-3] = (byte) (( value >> 16 ) & 0xFF);
newarray[newarray.length-2] = (byte) (( value >> 8 ) & 0xFF);
newarray[newarray.length-1] = (byte) ( value & 0xFF);
array = newarray;
}
else
{
array = new byte[4];
array[0] = (byte) (( value >> 24 ) & 0xFF);
array[1] = (byte) (( value >> 16 ) & 0xFF);
array[2] = (byte) (( value >> 8 ) & 0xFF);
array[3] = (byte) (value & 0xFF);
}
return array;
}
public static byte[] addBytes(byte[] array,String value)
{
if( null != value )
{
if( null != array)
{
byte newarray[] = new byte[array.length + value.length()];
System.arraycopy(array,0,newarray,0,array.length);
System.arraycopy(value.getBytes(),0,newarray,array.length,value.length());
array = newarray;
}
else
{
array = value.getBytes();
}
}
return array;
}
public static byte[] addBytes(byte[] array, short value)
{
if( null != array)
{
byte newarray[] = new byte[array.length + 2];
System.arraycopy(array,0,newarray,0,array.length);
newarray[newarray.length-2] = (byte) (( value >> 8 ) & 0xFF);
newarray[newarray.length-1] = (byte) ( value & 0xFF);
array = newarray;
}
else
{
array = new byte[2];
array[0] = (byte) (( value >> 8 ) & 0xFF);
array[1] = (byte) ( value & 0xFF);
}
return array;
}
public static double byteArrayToDouble(byte high[], byte low[])
{
double temp = 0;
// high bytes
temp += (((long)high[0]) & 0xFF) << 56;
temp += (((long)high[1]) & 0xFF) << 48;
temp += (((long)high[2]) & 0xFF) << 40;
temp += (((long)high[3]) & 0xFF) << 32;
// low bytes
temp += (((long)low[0]) & 0xFF) << 24;
temp += (((long)low[1]) & 0xFF) << 16;
temp += (((long)low[2]) & 0xFF) << 8;
temp += (((long)low[3]) & 0xFF);
return temp;
}
public static double byteArrayToDouble(byte value[])
{
byte high[] = new byte[4];
byte low[] = new byte[4];
high[0] = value[0];
high[1] = value[1];
high[2] = value[2];
high[3] = value[3];
low[0] = value[4];
low[1] = value[5];
low[2] = value[6];
low[3] = value[7];
return byteArrayToDouble(high,low);
}
public static float byteArrayToFloat(byte value[])
{
float temp = 0;
temp += (((int)value[0]) & 0xFF) << 24;
temp += (((int)value[1]) & 0xFF) << 16;
temp += (((int)value[2]) & 0xFF) << 8;
temp += (((int)value[3]) & 0xFF);
return temp;
}
public static int byteArrayToInt(byte value[])
{
int temp = 0;
temp += (((int)value[0]) & 0xFF) << 24;
temp += (((int)value[1]) & 0xFF) << 16;
temp += (((int)value[2]) & 0xFF) << 8;
temp += (((int)value[3]) & 0xFF);
return temp;
}
public static long byteArrayToLong(byte value[])
{
byte high[] = new byte[4];
byte low[] = new byte[4];
high[0] = value[0];
high[1] = value[1];
high[2] = value[2];
high[3] = value[3];
low[0] = value[4];
low[1] = value[5];
low[2] = value[6];
low[3] = value[7];
return byteArrayToLong(high,low);
}
public static long byteArrayToLong(byte high[], byte low[])
{
long temp = 0;
// high bytes
temp += (((long)high[0]) & 0xFF) << 56;
temp += (((long)high[1]) & 0xFF) << 48;
temp += (((long)high[2]) & 0xFF) << 40;
temp += (((long)high[3]) & 0xFF) << 32;
// low bytes
temp += (((long)low[0]) & 0xFF) << 24;
temp += (((long)low[1]) & 0xFF) << 16;
temp += (((long)low[2]) & 0xFF) << 8;
temp += (((long)low[3]) & 0xFF);
return temp;
}
// make the following loops with check on array length *****************
public static short byteArrayToShort(byte value[])
{
short temp = 0;
temp += (((int)value[0]) & 0xFF) << 8;
temp += (((int)value[1]) & 0xFF);
return temp;
}
public static String byteToHexString(byte value)
{
String temp = null;
switch( (value & 0xF0) >> 4 )
{
case 0:
temp = "0";
break;
case 1:
temp = "1";
break;
case 2:
temp = "2";
break;
case 3:
temp = "3";
break;
case 4:
temp = "4";
break;
case 5:
temp = "5";
break;
case 6:
temp = "6";
break;
case 7:
temp = "7";
break;
case 8:
temp = "8";
break;
case 9:
temp = "9";
break;
case 10:
temp = "A";
break;
case 11:
temp = "B";
break;
case 12:
temp = "C";
break;
case 13:
temp = "D";
break;
case 14:
temp = "E";
break;
case 15:
temp = "F";
break;
}
switch( (value & 0x0F) )
{
case 0:
temp += "0";
break;
case 1:
temp += "1";
break;
case 2:
temp += "2";
break;
case 3:
temp += "3";
break;
case 4:
temp += "4";
break;
case 5:
temp += "5";
break;
case 6:
temp += "6";
break;
case 7:
temp += "7";
break;
case 8:
temp += "8";
break;
case 9:
temp += "9";
break;
case 10:
temp += "A";
break;
case 11:
temp += "B";
break;
case 12:
temp += "C";
break;
case 13:
temp += "D";
break;
case 14:
temp += "E";
break;
case 15:
temp += "F";
break;
}
return temp;
}
}