Mega Code Archive
A growable array of bytes
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/*********************************************************************
*
* Copyright (C) 2005 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;
/**
* A growable array of bytes
*/
public class ByteArray
{
/**
* The array grow size
*/
private int growSize;
/**
* The current array
*/
private byte[] bytes;
/**
* The current position
*/
private int pos;
// The default grow size
private final static int defaultGrowSize = 1024;
/**
* Constructor
*/
public ByteArray()
{
this(defaultGrowSize);
}
/**
* Constructor
*
* @param gs
*/
public ByteArray(int gs)
{
growSize = gs;
bytes = new byte[defaultGrowSize];
pos = 0;
}
/**
* Adds a byte onto the array
*
* @param b the byte
*/
public void add(byte b)
{
checkSize(1);
bytes[pos] = b;
pos++;
}
/**
* Adds an array of bytes onto the array
*
* @param b the array of bytes
*/
public void add(byte[] b)
{
checkSize(b.length);
System.arraycopy(b, 0, bytes, pos, b.length);
pos += b.length;
}
/**
* Gets the complete array
*
* @return the array
*/
public byte[] getBytes()
{
byte[] returnArray = new byte[pos];
System.arraycopy(bytes, 0, returnArray, 0, pos);
return returnArray;
}
/**
* Checks to see if there is sufficient space left on the array. If not,
* then it grows the array
*
* @param sz the amount of bytes to add
*/
private void checkSize(int sz)
{
while (pos + sz >= bytes.length)
{
// Grow the array
byte[] newArray = new byte[bytes.length + growSize];
System.arraycopy(bytes, 0, newArray, 0, pos);
bytes = newArray;
}
}
}
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