/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package java.nio;
import org.apache.harmony.luni.platform.PlatformAddress;
// BEGIN android-added
import org.apache.harmony.luni.platform.PlatformAddressFactory;
// END android-added
/**
* DirectByteBuffer, ReadWriteDirectByteBuffer and ReadOnlyDirectByteBuffer
* compose the implementation of platform memory based byte buffers.
* <p>
* ReadWriteDirectByteBuffer extends DirectByteBuffer with all the write
* methods.
* </p>
* <p>
* This class is marked final for runtime performance.
* </p>
*
*/
final class ReadWriteDirectByteBuffer extends DirectByteBuffer {
static ReadWriteDirectByteBuffer copy(DirectByteBuffer other,
int markOfOther) {
ReadWriteDirectByteBuffer buf = new ReadWriteDirectByteBuffer(
other.safeAddress, other.capacity(), other.offset);
buf.limit = other.limit();
buf.position = other.position();
buf.mark = markOfOther;
buf.order(other.order());
return buf;
}
ReadWriteDirectByteBuffer(int capacity) {
super(capacity);
}
// BEGIN android-added
ReadWriteDirectByteBuffer(int pointer, int capacity) {
this(PlatformAddressFactory.on(pointer, capacity),capacity,0);
}
// END android-added
ReadWriteDirectByteBuffer(SafeAddress address, int capacity, int offset) {
super(address, capacity, offset);
}
ReadWriteDirectByteBuffer(PlatformAddress address, int aCapacity,
int anOffset) {
super(new SafeAddress(address), aCapacity, anOffset);
}
// BEGIN android-added
int getAddress() {
return this.safeAddress.address.toInt();
}
// END android-added
@Override
public ByteBuffer asReadOnlyBuffer() {
return ReadOnlyDirectByteBuffer.copy(this, mark);
}
@Override
public ByteBuffer compact() {
PlatformAddress effectiveAddress = getEffectiveAddress();
effectiveAddress.offsetBytes(position).moveTo(effectiveAddress,
remaining());
position = limit - position;
limit = capacity;
mark = UNSET_MARK;
return this;
}
@Override
public ByteBuffer duplicate() {
return copy(this, mark);
}
@Override
public boolean isReadOnly() {
return false;
}
@Override
public ByteBuffer put(byte value) {
if (position == limit) {
throw new BufferOverflowException();
}
getBaseAddress().setByte(offset + position++, value);
return this;
}
@Override
public ByteBuffer put(int index, byte value) {
if (index < 0 || index >= limit) {
throw new IndexOutOfBoundsException();
}
getBaseAddress().setByte(offset + index, value);
return this;
}
/*
* Override ByteBuffer.put(byte[], int, int) to improve performance.
*
* (non-Javadoc)
*
* @see java.nio.ByteBuffer#put(byte[], int, int)
*/
@Override
public ByteBuffer put(byte[] src, int off, int len) {
int length = src.length;
if (off < 0 || len < 0 || (long) off + (long) len > length) {
throw new IndexOutOfBoundsException();
}
if (len > remaining()) {
throw new BufferOverflowException();
}
getBaseAddress().setByteArray(offset + position, src, off, len);
position += len;
return this;
}
// BEGIN android-added
/**
* Writes <code>short</code>s in the given short array, starting from the
* specified offset, to the current position and increase the position by
* the number of <code>short</code>s written.
*
* @param src
* The source short array
* @param off
* The offset of short array, must be no less than zero and no
* greater than <code>src.length</code>
* @param len
* The number of <code>short</code>s to write, must be no less
* than zero and no greater than <code>src.length - off</code>
* @return This buffer
* @exception BufferOverflowException
* If <code>remaining()</code> is less than
* <code>len</code>
* @exception IndexOutOfBoundsException
* If either <code>off</code> or <code>len</code> is
* invalid
* @exception ReadOnlyBufferException
* If no changes may be made to the contents of this buffer
*/
ByteBuffer put(short[] src, int off, int len) {
int length = src.length;
if (off < 0 || len < 0 || (long)off + (long)len > length) {
throw new IndexOutOfBoundsException();
}
if (len << 1 > remaining()) {
throw new BufferOverflowException();
}
if (isReadOnly()) {
throw new ReadOnlyBufferException();
}
boolean swap = order() != ByteOrder.nativeOrder();
getBaseAddress().setShortArray(offset + position, src, off, len, swap);
position += len << 1;
return this;
}
/**
* Writes <code>int</code>s in the given int array, starting from the
* specified offset, to the current position and increase the position by
* the number of <code>int</code>s written.
*
* @param src
* The source int array
* @param off
* The offset of int array, must be no less than zero and no
* greater than <code>src.length</code>
* @param len
* The number of <code>int</code>s to write, must be no less
* than zero and no greater than <code>src.length - off</code>
* @return This buffer
* @exception BufferOverflowException
* If <code>remaining()</code> is less than
* <code>len</code>
* @exception IndexOutOfBoundsException
* If either <code>off</code> or <code>len</code> is
* invalid
* @exception ReadOnlyBufferException
* If no changes may be made to the contents of this buffer
*/
ByteBuffer put(int[] src, int off, int len) {
int length = src.length;
if (off < 0 || len < 0 || (long)off + (long)len > length) {
throw new IndexOutOfBoundsException();
}
if (len << 2 > remaining()) {
throw new BufferOverflowException();
}
if (isReadOnly()) {
throw new ReadOnlyBufferException();
}
boolean swap = order() != ByteOrder.nativeOrder();
getBaseAddress().setIntArray(offset + position, src, off, len, swap);
position += len << 2;
return this;
}
// END android-added
@Override
public ByteBuffer putDouble(double value) {
int newPosition = position + 8;
if (newPosition > limit) {
throw new BufferOverflowException();
}
getBaseAddress().setDouble(offset + position, value, order);
position = newPosition;
return this;
}
@Override
public ByteBuffer putDouble(int index, double value) {
if (index < 0 || (long) index + 8 > limit) {
throw new IndexOutOfBoundsException();
}
getBaseAddress().setDouble(offset + index, value, order);
return this;
}
@Override
public ByteBuffer putFloat(float value) {
int newPosition = position + 4;
if (newPosition > limit) {
throw new BufferOverflowException();
}
getBaseAddress().setFloat(offset + position, value, order);
position = newPosition;
return this;
}
@Override
public ByteBuffer putFloat(int index, float value) {
if (index < 0 || (long) index + 4 > limit) {
throw new IndexOutOfBoundsException();
}
getBaseAddress().setFloat(offset + index, value, order);
return this;
}
@Override
public ByteBuffer putInt(int value) {
int newPosition = position + 4;
if (newPosition > limit) {
throw new BufferOverflowException();
}
getBaseAddress().setInt(offset + position, value, order);
position = newPosition;
return this;
}
@Override
public ByteBuffer putInt(int index, int value) {
if (index < 0 || (long) index + 4 > limit) {
throw new IndexOutOfBoundsException();
}
getBaseAddress().setInt(offset + index, value, order);
return this;
}
@Override
public ByteBuffer putLong(long value) {
int newPosition = position + 8;
if (newPosition > limit) {
throw new BufferOverflowException();
}
getBaseAddress().setLong(offset + position, value, order);
position = newPosition;
return this;
}
@Override
public ByteBuffer putLong(int index, long value) {
if (index < 0 || (long) index + 8 > limit) {
throw new IndexOutOfBoundsException();
}
getBaseAddress().setLong(offset + index, value, order);
return this;
}
@Override
public ByteBuffer putShort(short value) {
int newPosition = position + 2;
if (newPosition > limit) {
throw new BufferOverflowException();
}
getBaseAddress().setShort(offset + position, value, order);
position = newPosition;
return this;
}
@Override
public ByteBuffer putShort(int index, short value) {
if (index < 0 || (long) index + 2 > limit) {
throw new IndexOutOfBoundsException();
}
getBaseAddress().setShort(offset + index, value, order);
return this;
}
@Override
public ByteBuffer slice() {
ReadWriteDirectByteBuffer buf = new ReadWriteDirectByteBuffer(
safeAddress, remaining(), offset + position);
buf.order = order;
return buf;
}
}