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/**
* Copyright 2010-2023 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. 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 JogAmp Community ``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 JogAmp Community 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.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
/*
* Created on Saturday, March 27 2010 11:55
*/
package com.jogamp.common.nio;
import com.jogamp.common.os.*;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import java.nio.LongBuffer;
/**
* @author Sven Gothel
* @author Michael Bien
*/
@SuppressWarnings("rawtypes")
public abstract class AbstractBuffer<B extends AbstractBuffer> implements NativeBuffer<B> {
/** Platform dependent pointer size in bytes, i.e. 32bit or 64bit wide, depending of the CPU pointer width. */
public static final int POINTER_SIZE;
protected final Buffer buffer;
protected final int elementSize;
protected final int capacity;
protected int position;
static {
Platform.initSingleton(); // loads native gluegen_rt library
POINTER_SIZE = Platform.is32Bit() ? Buffers.SIZEOF_INT : Buffers.SIZEOF_LONG ;
}
/**
* capacity and elementSize should be match the equation w/ target buffer type
* <pre>
* capacity = elementSizeInBytes(buffer) * buffer.capacity() ) / elementSize
* </pre>
* @param buffer shall be in target format.
* @param elementSize the target element size in bytes.
* @param capacity the target capacity in elements of size <code>elementSize</code>.
*/
protected AbstractBuffer(final Buffer buffer, final int elementSize, final int capacity) {
this.buffer = buffer;
this.elementSize = elementSize;
this.capacity = capacity;
this.position = 0;
}
@Override
public final int elementSize() {
return elementSize;
}
@Override
public final int limit() {
return capacity;
}
@Override
public final int capacity() {
return capacity;
}
@Override
public final int position() {
return position;
}
@Override
public final B position(final int newPos) {
if (0 > newPos || newPos >= capacity) {
throw new IndexOutOfBoundsException("Sorry to interrupt, but the position "+newPos+" was out of bounds. " +
"My capacity is "+capacity()+".");
}
position = newPos;
return (B)this;
}
@Override
public final int remaining() {
return capacity - position;
}
@Override
public final boolean hasRemaining() {
return position < capacity;
}
@Override
public final B rewind() {
position = 0;
return (B) this;
}
@Override
public final Buffer getBuffer() {
return buffer;
}
@Override
public final boolean isDirect() {
return buffer.isDirect();
}
@Override
public long getDirectBufferAddress() {
if( isDirect() ) {
return Buffers.getDirectBufferAddressImpl(buffer);
} else {
return 0;
}
}
@Override
public void storeDirectAddress(final ByteBuffer directDest) {
final long addr = getDirectBufferAddress();
switch(POINTER_SIZE) {
case 4:
directDest.putInt(0, (int) ( addr & 0x00000000FFFFFFFFL ) );
break;
case 8:
directDest.putLong(0, addr);
break;
}
directDest.position(directDest.position()+POINTER_SIZE);
}
@Override
public void storeDirectAddress(final ByteBuffer directDest, final int destBytePos) {
final long addr = getDirectBufferAddress();
switch(POINTER_SIZE) {
case 4:
directDest.putInt(destBytePos, (int) ( addr & 0x00000000FFFFFFFFL ) );
break;
case 8:
directDest.putLong(destBytePos, addr);
break;
}
}
@Override
public final boolean hasArray() {
return buffer.hasArray();
}
@Override
public final int arrayOffset() {
if( hasArray() ) {
return buffer.arrayOffset();
} else {
return 0;
}
}
@Override
public Object array() throws UnsupportedOperationException {
return buffer.array();
}
protected String toSubString() {
return "[direct["+isDirect()+", addr 0x"+Long.toHexString(getDirectBufferAddress())+"], hasArray "+hasArray()+", capacity "+capacity+", position "+position+", elementSize "+elementSize+", buffer[capacity "+buffer.capacity()+", lim "+buffer.limit()+", pos "+buffer.position()+"]]";
}
@Override
public String toString() {
return "AbstractBuffer"+toSubString();
}
}
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