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/* $Id: ByteArray.java,v 1.2 1998/08/13 14:33:58 boyns Exp $ */
/*
* Copyright (C) 1996-98 Mark R. Boyns <boyns@doit.org>
*
* This file is part of Muffin.
*
* Muffin 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.
*
* Muffin 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 Muffin; see the file COPYING. If not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
package org.doit.io;
/**
* Class used to represent an array of bytes as an Object.
*
* @author Mark Boyns
*/
public class ByteArray
{
public byte bytes[];
public int offset = 0;
/**
* Create a ByteArray with the default size.
*/
public ByteArray ()
{
this (512);
}
/**
* Create a ByteArray with a specific default size.
*/
public ByteArray (int size)
{
bytes = new byte[size];
}
/**
* Create a ByteArray from a String.
*/
public ByteArray (String s)
{
this (s.length ());
append (s);
}
/**
* Create a ByteArray from an array of bytes.
*/
public ByteArray (byte b[])
{
this (b.length);
append (b);
}
/**
* Append a byte.
*/
public void append (byte ch)
{
if (offset == bytes.length)
{
byte tmpbytes[] = bytes;
bytes = new byte[tmpbytes.length * 2];
System.arraycopy (tmpbytes, 0, bytes, 0, offset);
}
bytes[offset++] = ch;
}
/**
* Append a ByteArray.
*/
public void append (ByteArray b)
{
if (bytes.length - offset < b.length ())
{
byte tmpbytes[] = bytes;
bytes = new byte[tmpbytes.length + b.length ()];
System.arraycopy (tmpbytes, 0, bytes, 0, offset);
}
System.arraycopy (b.bytes, 0, bytes, offset, b.length ());
offset += b.length ();
}
/**
* Append an array of bytes.
*/
public void append (byte b[])
{
if (bytes.length - offset < b.length)
{
byte tmpbytes[] = bytes;
bytes = new byte[tmpbytes.length + b.length];
System.arraycopy (tmpbytes, 0, bytes, 0, offset);
}
System.arraycopy (b, 0, bytes, offset, b.length);
offset += b.length;
}
/**
* Append a String.
*/
public void append (String s)
{
append (s.getBytes ());
}
/**
* Convert to String.
*/
public String toString ()
{
return new String (bytes, 0, offset);
}
/**
* Return the bytes.
*/
public byte getBytes () []
{
return bytes;
}
public byte get (int i)
{
return bytes[i];
}
/**
* Return the number of bytes.
*/
public int length ()
{
return offset;
}
public void erase ()
{
offset = 0;
}
public void chop ()
{
chop (1);
}
public void chop (int i)
{
offset -= i;
if (offset < 0)
{
offset = 0;
}
}
public static void main (String args[])
{
ByteArray b = new ByteArray (3);
b.append ("foo");
b.append ("bar");
b.append ("joe");
System.out.println (b.toString ());
ByteArray tmp = new ByteArray (1);
tmp.append ("test");
b.append (tmp);
System.out.println (b.toString ());
}
}
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