/* 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 libcore.io.Memory;
import libcore.io.SizeOf;
/**
* HeapByteBuffer, ReadWriteHeapByteBuffer and ReadOnlyHeapByteBuffer compose
* the implementation of array based byte buffers.
* <p>
* ReadWriteHeapByteBuffer extends HeapByteBuffer with all the write methods.
* </p>
* <p>
* This class is marked final for runtime performance.
* </p>
*
*/
final class ReadWriteHeapByteBuffer extends HeapByteBuffer {
static ReadWriteHeapByteBuffer copy(HeapByteBuffer other, int markOfOther) {
ReadWriteHeapByteBuffer buf =
new ReadWriteHeapByteBuffer(other.backingArray, other.capacity(), other.offset);
buf.limit = other.limit;
buf.position = other.position();
buf.mark = markOfOther;
return buf;
}
ReadWriteHeapByteBuffer(byte[] backingArray) {
super(backingArray);
}
ReadWriteHeapByteBuffer(int capacity) {
super(capacity);
}
ReadWriteHeapByteBuffer(byte[] backingArray, int capacity, int arrayOffset) {
super(backingArray, capacity, arrayOffset);
}
@Override
public ByteBuffer asReadOnlyBuffer() {
return ReadOnlyHeapByteBuffer.copy(this, mark);
}
@Override
public ByteBuffer compact() {
System.arraycopy(backingArray, position + offset, backingArray, offset, 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 byte[] protectedArray() {
return backingArray;
}
@Override int protectedArrayOffset() {
return offset;
}
@Override boolean protectedHasArray() {
return true;
}
@Override
public ByteBuffer put(byte b) {
if (position == limit) {
throw new BufferOverflowException();
}
backingArray[offset + position++] = b;
return this;
}
@Override
public ByteBuffer put(int index, byte b) {
checkIndex(index);
backingArray[offset + index] = b;
return this;
}
@Override
public ByteBuffer put(byte[] src, int srcOffset, int byteCount) {
checkPutBounds(1, src.length, srcOffset, byteCount);
System.arraycopy(src, srcOffset, backingArray, offset + position, byteCount);
position += byteCount;
return this;
}
final void put(char[] src, int srcOffset, int charCount) {
int byteCount = checkPutBounds(SizeOf.CHAR, src.length, srcOffset, charCount);
Memory.unsafeBulkPut(backingArray, offset + position, byteCount, src, srcOffset, SizeOf.CHAR, order.needsSwap);
position += byteCount;
}
final void put(double[] src, int srcOffset, int doubleCount) {
int byteCount = checkPutBounds(SizeOf.DOUBLE, src.length, srcOffset, doubleCount);
Memory.unsafeBulkPut(backingArray, offset + position, byteCount, src, srcOffset, SizeOf.DOUBLE, order.needsSwap);
position += byteCount;
}
final void put(float[] src, int srcOffset, int floatCount) {
int byteCount = checkPutBounds(SizeOf.FLOAT, src.length, srcOffset, floatCount);
Memory.unsafeBulkPut(backingArray, offset + position, byteCount, src, srcOffset, SizeOf.FLOAT, order.needsSwap);
position += byteCount;
}
final void put(int[] src, int srcOffset, int intCount) {
int byteCount = checkPutBounds(SizeOf.INT, src.length, srcOffset, intCount);
Memory.unsafeBulkPut(backingArray, offset + position, byteCount, src, srcOffset, SizeOf.INT, order.needsSwap);
position += byteCount;
}
final void put(long[] src, int srcOffset, int longCount) {
int byteCount = checkPutBounds(SizeOf.LONG, src.length, srcOffset, longCount);
Memory.unsafeBulkPut(backingArray, offset + position, byteCount, src, srcOffset, SizeOf.LONG, order.needsSwap);
position += byteCount;
}
final void put(short[] src, int srcOffset, int shortCount) {
int byteCount = checkPutBounds(SizeOf.SHORT, src.length, srcOffset, shortCount);
Memory.unsafeBulkPut(backingArray, offset + position, byteCount, src, srcOffset, SizeOf.SHORT, order.needsSwap);
position += byteCount;
}
@Override
public ByteBuffer putChar(int index, char value) {
checkIndex(index, SizeOf.CHAR);
Memory.pokeShort(backingArray, offset + index, (short) value, order);
return this;
}
@Override
public ByteBuffer putChar(char value) {
int newPosition = position + SizeOf.CHAR;
if (newPosition > limit) {
throw new BufferOverflowException();
}
Memory.pokeShort(backingArray, offset + position, (short) value, order);
position = newPosition;
return this;
}
@Override
public ByteBuffer putDouble(double value) {
return putLong(Double.doubleToRawLongBits(value));
}
@Override
public ByteBuffer putDouble(int index, double value) {
return putLong(index, Double.doubleToRawLongBits(value));
}
@Override
public ByteBuffer putFloat(float value) {
return putInt(Float.floatToRawIntBits(value));
}
@Override
public ByteBuffer putFloat(int index, float value) {
return putInt(index, Float.floatToRawIntBits(value));
}
@Override
public ByteBuffer putInt(int value) {
int newPosition = position + SizeOf.INT;
if (newPosition > limit) {
throw new BufferOverflowException();
}
Memory.pokeInt(backingArray, offset + position, value, order);
position = newPosition;
return this;
}
@Override
public ByteBuffer putInt(int index, int value) {
checkIndex(index, SizeOf.INT);
Memory.pokeInt(backingArray, offset + index, value, order);
return this;
}
@Override
public ByteBuffer putLong(int index, long value) {
checkIndex(index, SizeOf.LONG);
Memory.pokeLong(backingArray, offset + index, value, order);
return this;
}
@Override
public ByteBuffer putLong(long value) {
int newPosition = position + SizeOf.LONG;
if (newPosition > limit) {
throw new BufferOverflowException();
}
Memory.pokeLong(backingArray, offset + position, value, order);
position = newPosition;
return this;
}
@Override
public ByteBuffer putShort(int index, short value) {
checkIndex(index, SizeOf.SHORT);
Memory.pokeShort(backingArray, offset + index, value, order);
return this;
}
@Override
public ByteBuffer putShort(short value) {
int newPosition = position + SizeOf.SHORT;
if (newPosition > limit) {
throw new BufferOverflowException();
}
Memory.pokeShort(backingArray, offset + position, value, order);
position = newPosition;
return this;
}
@Override
public ByteBuffer slice() {
return new ReadWriteHeapByteBuffer(backingArray, remaining(), offset + position);
}
}