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/*
* 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.SizeOf;
import libcore.io.Memory;
/**
* ByteArrayBuffer implements byte[]-backed ByteBuffers.
*/
final class ByteArrayBuffer extends ByteBuffer {
/**
* These fields are non-private for NioUtils.unsafeArray.
*/
final byte[] backingArray;
final int arrayOffset;
private final boolean isReadOnly;
ByteArrayBuffer(byte[] backingArray) {
this(backingArray.length, backingArray, 0, false);
}
private ByteArrayBuffer(int capacity, byte[] backingArray, int arrayOffset, boolean isReadOnly) {
super(capacity, null);
this.backingArray = backingArray;
this.arrayOffset = arrayOffset;
this.isReadOnly = isReadOnly;
if (arrayOffset + capacity > backingArray.length) {
throw new IndexOutOfBoundsException("backingArray.length=" + backingArray.length +
", capacity=" + capacity + ", arrayOffset=" + arrayOffset);
}
}
private static ByteArrayBuffer copy(ByteArrayBuffer other, int markOfOther, boolean isReadOnly) {
ByteArrayBuffer buf = new ByteArrayBuffer(other.capacity(), other.backingArray, other.arrayOffset, isReadOnly);
buf.limit = other.limit;
buf.position = other.position();
buf.mark = markOfOther;
return buf;
}
@Override public ByteBuffer asReadOnlyBuffer() {
return copy(this, mark, true);
}
@Override public ByteBuffer compact() {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
System.arraycopy(backingArray, position + arrayOffset, backingArray, arrayOffset, remaining());
position = limit - position;
limit = capacity;
mark = UNSET_MARK;
return this;
}
@Override public ByteBuffer duplicate() {
return copy(this, mark, isReadOnly);
}
@Override public ByteBuffer slice() {
return new ByteArrayBuffer(remaining(), backingArray, arrayOffset + position, isReadOnly);
}
@Override public boolean isReadOnly() {
return isReadOnly;
}
@Override byte[] protectedArray() {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
return backingArray;
}
@Override int protectedArrayOffset() {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
return arrayOffset;
}
@Override boolean protectedHasArray() {
if (isReadOnly) {
return false;
}
return true;
}
@Override public final ByteBuffer get(byte[] dst, int dstOffset, int byteCount) {
checkGetBounds(1, dst.length, dstOffset, byteCount);
System.arraycopy(backingArray, arrayOffset + position, dst, dstOffset, byteCount);
position += byteCount;
return this;
}
final void get(char[] dst, int dstOffset, int charCount) {
int byteCount = checkGetBounds(SizeOf.CHAR, dst.length, dstOffset, charCount);
Memory.unsafeBulkGet(dst, dstOffset, byteCount, backingArray, arrayOffset + position, SizeOf.CHAR, order.needsSwap);
position += byteCount;
}
final void get(double[] dst, int dstOffset, int doubleCount) {
int byteCount = checkGetBounds(SizeOf.DOUBLE, dst.length, dstOffset, doubleCount);
Memory.unsafeBulkGet(dst, dstOffset, byteCount, backingArray, arrayOffset + position, SizeOf.DOUBLE, order.needsSwap);
position += byteCount;
}
final void get(float[] dst, int dstOffset, int floatCount) {
int byteCount = checkGetBounds(SizeOf.FLOAT, dst.length, dstOffset, floatCount);
Memory.unsafeBulkGet(dst, dstOffset, byteCount, backingArray, arrayOffset + position, SizeOf.FLOAT, order.needsSwap);
position += byteCount;
}
final void get(int[] dst, int dstOffset, int intCount) {
int byteCount = checkGetBounds(SizeOf.INT, dst.length, dstOffset, intCount);
Memory.unsafeBulkGet(dst, dstOffset, byteCount, backingArray, arrayOffset + position, SizeOf.INT, order.needsSwap);
position += byteCount;
}
final void get(long[] dst, int dstOffset, int longCount) {
int byteCount = checkGetBounds(SizeOf.LONG, dst.length, dstOffset, longCount);
Memory.unsafeBulkGet(dst, dstOffset, byteCount, backingArray, arrayOffset + position, SizeOf.LONG, order.needsSwap);
position += byteCount;
}
final void get(short[] dst, int dstOffset, int shortCount) {
int byteCount = checkGetBounds(SizeOf.SHORT, dst.length, dstOffset, shortCount);
Memory.unsafeBulkGet(dst, dstOffset, byteCount, backingArray, arrayOffset + position, SizeOf.SHORT, order.needsSwap);
position += byteCount;
}
@Override public final byte get() {
if (position == limit) {
throw new BufferUnderflowException();
}
return backingArray[arrayOffset + position++];
}
@Override public final byte get(int index) {
checkIndex(index);
return backingArray[arrayOffset + index];
}
@Override public final char getChar() {
int newPosition = position + SizeOf.CHAR;
if (newPosition > limit) {
throw new BufferUnderflowException();
}
char result = (char) Memory.peekShort(backingArray, arrayOffset + position, order);
position = newPosition;
return result;
}
@Override public final char getChar(int index) {
checkIndex(index, SizeOf.CHAR);
return (char) Memory.peekShort(backingArray, arrayOffset + index, order);
}
@Override public final double getDouble() {
return Double.longBitsToDouble(getLong());
}
@Override public final double getDouble(int index) {
return Double.longBitsToDouble(getLong(index));
}
@Override public final float getFloat() {
return Float.intBitsToFloat(getInt());
}
@Override public final float getFloat(int index) {
return Float.intBitsToFloat(getInt(index));
}
@Override public final int getInt() {
int newPosition = position + SizeOf.INT;
if (newPosition > limit) {
throw new BufferUnderflowException();
}
int result = Memory.peekInt(backingArray, arrayOffset + position, order);
position = newPosition;
return result;
}
@Override public final int getInt(int index) {
checkIndex(index, SizeOf.INT);
return Memory.peekInt(backingArray, arrayOffset + index, order);
}
@Override public final long getLong() {
int newPosition = position + SizeOf.LONG;
if (newPosition > limit) {
throw new BufferUnderflowException();
}
long result = Memory.peekLong(backingArray, arrayOffset + position, order);
position = newPosition;
return result;
}
@Override public final long getLong(int index) {
checkIndex(index, SizeOf.LONG);
return Memory.peekLong(backingArray, arrayOffset + index, order);
}
@Override public final short getShort() {
int newPosition = position + SizeOf.SHORT;
if (newPosition > limit) {
throw new BufferUnderflowException();
}
short result = Memory.peekShort(backingArray, arrayOffset + position, order);
position = newPosition;
return result;
}
@Override public final short getShort(int index) {
checkIndex(index, SizeOf.SHORT);
return Memory.peekShort(backingArray, arrayOffset + index, order);
}
@Override public final boolean isDirect() {
return false;
}
@Override public ByteBuffer put(byte b) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
if (position == limit) {
throw new BufferOverflowException();
}
backingArray[arrayOffset + position++] = b;
return this;
}
@Override public ByteBuffer put(int index, byte b) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
checkIndex(index);
backingArray[arrayOffset + index] = b;
return this;
}
@Override public ByteBuffer put(byte[] src, int srcOffset, int byteCount) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
checkPutBounds(1, src.length, srcOffset, byteCount);
System.arraycopy(src, srcOffset, backingArray, arrayOffset + 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, arrayOffset + 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, arrayOffset + 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, arrayOffset + 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, arrayOffset + 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, arrayOffset + 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, arrayOffset + position, byteCount, src, srcOffset, SizeOf.SHORT, order.needsSwap);
position += byteCount;
}
@Override public ByteBuffer putChar(int index, char value) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
checkIndex(index, SizeOf.CHAR);
Memory.pokeShort(backingArray, arrayOffset + index, (short) value, order);
return this;
}
@Override public ByteBuffer putChar(char value) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
int newPosition = position + SizeOf.CHAR;
if (newPosition > limit) {
throw new BufferOverflowException();
}
Memory.pokeShort(backingArray, arrayOffset + 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) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
int newPosition = position + SizeOf.INT;
if (newPosition > limit) {
throw new BufferOverflowException();
}
Memory.pokeInt(backingArray, arrayOffset + position, value, order);
position = newPosition;
return this;
}
@Override public ByteBuffer putInt(int index, int value) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
checkIndex(index, SizeOf.INT);
Memory.pokeInt(backingArray, arrayOffset + index, value, order);
return this;
}
@Override public ByteBuffer putLong(int index, long value) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
checkIndex(index, SizeOf.LONG);
Memory.pokeLong(backingArray, arrayOffset + index, value, order);
return this;
}
@Override public ByteBuffer putLong(long value) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
int newPosition = position + SizeOf.LONG;
if (newPosition > limit) {
throw new BufferOverflowException();
}
Memory.pokeLong(backingArray, arrayOffset + position, value, order);
position = newPosition;
return this;
}
@Override public ByteBuffer putShort(int index, short value) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
checkIndex(index, SizeOf.SHORT);
Memory.pokeShort(backingArray, arrayOffset + index, value, order);
return this;
}
@Override public ByteBuffer putShort(short value) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
int newPosition = position + SizeOf.SHORT;
if (newPosition > limit) {
throw new BufferOverflowException();
}
Memory.pokeShort(backingArray, arrayOffset + position, value, order);
position = newPosition;
return this;
}
@Override public final CharBuffer asCharBuffer() {
return ByteBufferAsCharBuffer.asCharBuffer(this);
}
@Override public final DoubleBuffer asDoubleBuffer() {
return ByteBufferAsDoubleBuffer.asDoubleBuffer(this);
}
@Override public final FloatBuffer asFloatBuffer() {
return ByteBufferAsFloatBuffer.asFloatBuffer(this);
}
@Override public final IntBuffer asIntBuffer() {
return ByteBufferAsIntBuffer.asIntBuffer(this);
}
@Override public final LongBuffer asLongBuffer() {
return ByteBufferAsLongBuffer.asLongBuffer(this);
}
@Override public final ShortBuffer asShortBuffer() {
return ByteBufferAsShortBuffer.asShortBuffer(this);
}
}
