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/*
Wotonomy: OpenStep design patterns for pure Java applications.
Copyright (C) 2000 Blacksmith, Inc.
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, see http://www.gnu.org
*/
package net.wotonomy.foundation;
/**
* A pure java implementation of NSMutableData, which
* is basically an editable wrapper for a byte array.
*
* @author michael@mpowers.net
* @author $Author: cgruber $
* @version $Revision: 892 $
*/
public class NSMutableData
extends NSData
{
/**
* Default constructor creates a zero-data object.
*/
public NSMutableData ()
{
super();
}
/**
* Creates an object containing the contents of the specified URL.
*/
public NSMutableData (java.net.URL aURL)
{
super( aURL );
}
/**
* Creates an object containing a copy of the contents of the
* specified NSData object.
*/
public NSMutableData (NSData aData)
{
super( aData );
}
/**
* Creates an object containing the specified number of bytes
* initialized to all zeroes.
*/
public NSMutableData (int size)
{
super( new byte[size] ); // inits to zeroes
}
/**
* Sets the length of the data to the specified length.
* If shorter, the data is truncated. If longer, the extra
* bytes are initialized to zeroes.
*/
public void setLength (int length)
{
byte[] data = new byte[ length ]; // inits to zeroes
int limit = length;
if (limit > bytes.length)
limit = bytes.length;
for ( int i = 0; i < limit; i++ )
{
data[i] = this.bytes[ i ];
}
this.bytes = data;
}
/**
* Appends the specified data to the end of this data.
*/
public void appendData (NSData aData)
{
int len = aData.length();
byte[] data = new byte[ bytes.length + len ];
int i;
for ( i = 0; i < bytes.length; i++ )
{
data[i] = bytes[i];
}
byte[] src = aData.bytes( 0, len );
for ( int j = 0; j < len; j++ )
{
data[i+j] = src[j];
}
bytes = data;
}
public void appendByte(byte b) {
setLength(bytes.length + 1);
bytes[bytes.length-1] = b;
}
public void appendBytes(byte[] b) {
int origLen = bytes.length;
setLength(origLen + b.length);
for (int i = 0; i < b.length; i++)
bytes[i + origLen] = b[i];
}
/**
* Increases the size of the byte array by the specified amount.
*/
public void increaseLengthBy (int increment)
{
setLength( length() + increment );
}
/**
* Sets the bytes in the array within the specified range to zero.
*/
public void resetBytesInRange (NSRange aRange)
{
int loc = aRange.location();
int max = aRange.maxRange();
for ( int i = loc; i < max; i++ )
{
bytes[i] = 0;
}
}
/**
* Copies the data in the specified object to this object,
* completely replacing the previous contents.
*/
public void setData (NSData aData)
{
bytes = aData.bytes( 0, aData.length() );
}
}
/*
* $Log$
* Revision 1.1 2006/02/16 12:47:16 cgruber
* Check in all sources in eclipse-friendly maven-enabled packages.
*
* Revision 1.2 2003/08/06 23:57:13 chochos
* appendByte(), appendBytes()
*
* Revision 1.1.1.1 2000/12/21 15:47:34 mpowers
* Contributing wotonomy.
*
* Revision 1.3 2000/12/20 16:25:38 michael
* Added log to all files.
*
*
*/
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