content: /*
   * Copyright (c) 2017, Andreas Fagschlunger. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   *   - Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *
   *   - Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in the
   *     documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package at.o2xfs.win32.impl;
  
  import java.util.Arrays;
  import java.util.HashSet;
  import java.util.Set;
  
  import at.o2xfs.common.Library;
  import at.o2xfs.win32.Buffer;
  import at.o2xfs.win32.BufferOverflowException;
  
  final class Win32Buffer extends Buffer {
  
  	static {
  		Library.loadLibrary("at.o2xfs.win32");
  	}
  
  	private static final byte[] NULL = new byte[4];
  
  	private final Set<Buffer> subBuffers = new HashSet<>();
  
  	public Win32Buffer(int size) {
  		super(size);
  	}
  
  	public Win32Buffer(byte[] address, int size) {
  		super(address, size);
  	}
  
  	@Override
  	protected byte[] allocate() {
  		return allocate0(getSize());
  	}
  
  	private native byte[] allocate0(int size);
  
  	@Override
  	public byte[] get() {
  		byte[] address = getAddress();
  		if (Arrays.equals(NULL, address)) {
  			return null;
  		}
  		return get0(getAddress(), getSize());
  	}
  
  	private native byte[] get0(byte[] address, int length);
  
  	@Override
  	public void put(byte[] src) {
  		if (src.length > getSize()) {
  			throw new BufferOverflowException();
  		} else if (getAddress() == NULL) {
  			throw new NullPointerException("address is 0");
  		}
  		put0(getAddress(), src);
  	}
  
  	private native void put0(byte[] address, byte[] src);
  
  	@Override
  	public Buffer subBuffer(int index, int size) {
  		if (index < 0) {
  			throw new IllegalArgumentException("index must not be negative: " + index);
  		} else if (size < 0) {
  			throw new IllegalArgumentException("size must not be negative: " + size);
  		} else if (index + size > getSize()) {
  			throw new BufferOverflowException();
  		}
  		Buffer result = subBuffer0(getAddress(), index, size);
  		subBuffers.add(result);
  		return result;
  	}
  
  	private native Buffer subBuffer0(byte[] address, int index, int size);
  
  	@Override
  	protected void _free() {
  		free0(getAddress());
  	}
  
  	private native void free0(byte[] address);
  }