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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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