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JVM AOT compiler currently generating JavaScript, C++, Haxe, with initial focus on Kotlin and games.
/*
* 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 com.jtransc.JTranscArrays;
import libcore.io.Memory;
import java.nio.internal.SizeOf;
public final class ByteBuffer extends Buffer implements Comparable {
ByteOrder order;
boolean isNativeOrder;
public final byte[] backingArray;
final int arrayOffset;
private final boolean isReadOnly;
private boolean isDirect;
ByteBuffer(byte[] backingArray) {
this(backingArray.length, backingArray, 0, false);
this.isDirect = false;
}
ByteBuffer(byte[] backingArray, boolean isDirect) {
this(backingArray.length, backingArray, 0, false);
this.isDirect = isDirect;
}
private ByteBuffer(int capacity, byte[] backingArray, int arrayOffset, boolean isReadOnly) {
super(0, capacity, null);
this.backingArray = backingArray;
this.arrayOffset = arrayOffset;
this.isReadOnly = isReadOnly;
order(ByteOrder.BIG_ENDIAN);
if (arrayOffset + capacity > backingArray.length) {
throw new IndexOutOfBoundsException("backingArray.length=" + backingArray.length +
", capacity=" + capacity + ", arrayOffset=" + arrayOffset);
}
}
public static ByteBuffer allocate(int capacity) {
if (capacity < 0) throw new IllegalArgumentException("capacity < 0: " + capacity);
return new ByteBuffer(new byte[capacity]);
}
public static ByteBuffer allocateDirect(int capacity) {
if (capacity < 0) throw new IllegalArgumentException("capacity < 0: " + capacity);
return new ByteBuffer(new byte[capacity], true);
}
public static ByteBuffer wrap(byte[] array) {
return new ByteBuffer(array);
}
public static ByteBuffer wrap(byte[] array, int start, int byteCount) {
JTranscArrays.checkOffsetAndCount(array.length, start, byteCount);
ByteBuffer buf = new ByteBuffer(array);
buf.position = start;
buf.limit = start + byteCount;
return buf;
}
@Override
public final byte[] array() {
_checkWritable();
return backingArray;
}
@Override
public final int arrayOffset() {
return protectedArrayOffset();
}
public final CharBuffer asCharBuffer() {
return ByteBufferAsCharBuffer.asCharBuffer(this);
}
public final DoubleBuffer asDoubleBuffer() {
return ByteBufferAsDoubleBuffer.asDoubleBuffer(this);
}
public final FloatBuffer asFloatBuffer() {
return ByteBufferAsFloatBuffer.asFloatBuffer(this);
}
public final IntBuffer asIntBuffer() {
return ByteBufferAsIntBuffer.asIntBuffer(this);
}
public final LongBuffer asLongBuffer() {
return ByteBufferAsLongBuffer.asLongBuffer(this);
}
public final ShortBuffer asShortBuffer() {
return ByteBufferAsShortBuffer.asShortBuffer(this);
}
@Override
public int compareTo(ByteBuffer otherBuffer) {
int compareRemaining = (remaining() < otherBuffer.remaining()) ? remaining()
: otherBuffer.remaining();
int thisPos = position;
int otherPos = otherBuffer.position;
byte thisByte, otherByte;
while (compareRemaining > 0) {
thisByte = get(thisPos);
otherByte = otherBuffer.get(otherPos);
if (thisByte != otherByte) return thisByte < otherByte ? -1 : 1;
thisPos++;
otherPos++;
compareRemaining--;
}
return remaining() - otherBuffer.remaining();
}
public ByteBuffer duplicate() {
return copy(this, mark, isReadOnly);
}
@Override
public boolean equals(Object other) {
if (!(other instanceof ByteBuffer)) {
return false;
}
ByteBuffer otherBuffer = (ByteBuffer) other;
if (remaining() != otherBuffer.remaining()) {
return false;
}
int myPosition = position;
int otherPosition = otherBuffer.position;
boolean equalSoFar = true;
while (equalSoFar && (myPosition < limit)) {
equalSoFar = get(myPosition++) == otherBuffer.get(otherPosition++);
}
return equalSoFar;
}
public ByteBuffer get(byte[] dst) {
return get(dst, 0, dst.length);
}
@Override
public final boolean hasArray() {
return protectedHasArray();
}
@Override
public int hashCode() {
int myPosition = position;
int hash = 0;
while (myPosition < limit) hash += get(myPosition++);
return hash;
}
public final boolean isDirect() {
return isDirect;
}
public final ByteOrder order() {
return order;
}
public final ByteBuffer order(ByteOrder byteOrder) {
if (byteOrder == null) byteOrder = ByteOrder.LITTLE_ENDIAN;
order = byteOrder;
isNativeOrder = byteOrder == ByteOrder.nativeOrder();
return this;
}
public final ByteBuffer put(byte[] src) {
return put(src, 0, src.length);
}
public ByteBuffer put(ByteBuffer src) {
_checkWritable();
if (src == this) throw new IllegalArgumentException("src == this");
int srcByteCount = src.remaining();
if (srcByteCount > remaining()) throw new BufferOverflowException();
while (src.hasRemaining()) this.put(src.get());
return this;
}
public ByteBuffer putChar(int index, char value) {
_checkWritable();
checkIndex(index, SizeOf.CHAR);
Memory.pokeShort(backingArray, arrayOffset + index, (short) value, order);
return this;
}
public ByteBuffer putChar(char value) {
_checkWritable();
int newPosition = position + SizeOf.CHAR;
if (newPosition > limit) throw new BufferOverflowException();
Memory.pokeShort(backingArray, arrayOffset + position, (short) value, order);
position = newPosition;
return this;
}
public ByteBuffer putDouble(double value) {
return putLong(Double.doubleToRawLongBits(value));
}
public ByteBuffer putDouble(int index, double value) {
return putLong(index, Double.doubleToRawLongBits(value));
}
public ByteBuffer putFloat(float value) {
return putInt(Float.floatToRawIntBits(value));
}
public ByteBuffer putFloat(int index, float value) {
return putInt(index, Float.floatToRawIntBits(value));
}
public ByteBuffer putInt(int value) {
_checkWritable();
int newPosition = position + SizeOf.INT;
if (newPosition > limit) throw new BufferOverflowException();
Memory.pokeInt(backingArray, arrayOffset + position, value, order);
position = newPosition;
return this;
}
public ByteBuffer putInt(int index, int value) {
_checkWritable();
checkIndex(index, SizeOf.INT);
Memory.pokeInt(backingArray, arrayOffset + index, value, order);
return this;
}
public ByteBuffer putLong(int index, long value) {
_checkWritable();
checkIndex(index, SizeOf.LONG);
Memory.pokeLong(backingArray, arrayOffset + index, value, order);
return this;
}
public ByteBuffer putLong(long value) {
_checkWritable();
int newPosition = position + SizeOf.LONG;
if (newPosition > limit) throw new BufferOverflowException();
Memory.pokeLong(backingArray, arrayOffset + position, value, order);
position = newPosition;
return this;
}
public ByteBuffer putShort(int index, short value) {
_checkWritable();
checkIndex(index, SizeOf.SHORT);
Memory.pokeShort(backingArray, arrayOffset + index, value, order);
return this;
}
public ByteBuffer putShort(short value) {
_checkWritable();
int newPosition = position + SizeOf.SHORT;
if (newPosition > limit) throw new BufferOverflowException();
Memory.pokeShort(backingArray, arrayOffset + position, value, order);
position = newPosition;
return this;
}
public ByteBuffer slice() {
return new ByteBuffer(remaining(), backingArray, arrayOffset + position, isReadOnly);
}
private static ByteBuffer copy(ByteBuffer other, int markOfOther, boolean isReadOnly) {
ByteBuffer buf = new ByteBuffer(other.capacity(), other.backingArray, other.arrayOffset, isReadOnly);
buf.limit = other.limit;
buf.position = other.position();
buf.mark = markOfOther;
return buf;
}
public ByteBuffer asReadOnlyBuffer() {
return copy(this, mark, true);
}
public ByteBuffer compact() {
_checkWritable();
System.arraycopy(backingArray, position + arrayOffset, backingArray, arrayOffset, remaining());
position = limit - position;
limit = capacity;
mark = UNSET_MARK;
return this;
}
public boolean isReadOnly() {
return isReadOnly;
}
private void _checkWritable() {
if (isReadOnly) throw new ReadOnlyBufferException();
}
byte[] protectedArray() {
_checkWritable();
return backingArray;
}
int protectedArrayOffset() {
_checkWritable();
return arrayOffset;
}
boolean protectedHasArray() {
return !isReadOnly;
}
//public ByteBuffer get(byte[] dst, int dstOffset, int byteCount) {
// JTranscArrays.checkOffsetAndCount(dst.length, dstOffset, byteCount);
// if (byteCount > remaining()) throw new BufferUnderflowException();
// for (int i = dstOffset; i < dstOffset + byteCount; ++i) dst[i] = get();
// return this;
//}
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;
throw new RuntimeException("Not implemented");
}
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;
throw new RuntimeException("Not implemented");
}
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;
throw new RuntimeException("Not implemented");
}
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;
throw new RuntimeException("Not implemented");
}
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;
throw new RuntimeException("Not implemented");
}
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;
throw new RuntimeException("Not implemented");
}
public final byte get() {
if (position == limit) throw new BufferUnderflowException();
return backingArray[arrayOffset + position++];
}
public final byte get(int index) {
checkIndex(index);
return backingArray[arrayOffset + index];
}
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;
}
public final char getChar(int index) {
checkIndex(index, SizeOf.CHAR);
return (char) Memory.peekShort(backingArray, arrayOffset + index, order);
}
public final double getDouble() {
return Double.longBitsToDouble(getLong());
}
public final double getDouble(int index) {
return Double.longBitsToDouble(getLong(index));
}
public final float getFloat() {
return Float.intBitsToFloat(getInt());
}
public final float getFloat(int index) {
return Float.intBitsToFloat(getInt(index));
}
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;
}
public final int getInt(int index) {
checkIndex(index, SizeOf.INT);
return Memory.peekInt(backingArray, arrayOffset + index, order);
}
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;
}
public final long getLong(int index) {
checkIndex(index, SizeOf.LONG);
return Memory.peekLong(backingArray, arrayOffset + index, order);
}
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;
}
public final short getShort(int index) {
checkIndex(index, SizeOf.SHORT);
return Memory.peekShort(backingArray, arrayOffset + index, order);
}
public ByteBuffer put(byte b) {
_checkWritable();
if (position == limit) {
throw new BufferOverflowException();
}
backingArray[arrayOffset + position++] = b;
return this;
}
public ByteBuffer put(int index, byte b) {
_checkWritable();
checkIndex(index);
backingArray[arrayOffset + index] = b;
return this;
}
//public ByteBuffer put(byte[] src, int srcOffset, int byteCount) {
// JTranscArrays.checkOffsetAndCount(src.length, srcOffset, byteCount);
// if (byteCount > remaining()) {
// throw new BufferOverflowException();
// }
// for (int i = srcOffset; i < srcOffset + byteCount; ++i) {
// put(src[i]);
// }
// return this;
//}
public ByteBuffer put(byte[] src, int srcOffset, int byteCount) {
_checkWritable();
checkPutBounds(1, src.length, srcOffset, byteCount);
System.arraycopy(src, srcOffset, backingArray, arrayOffset + position, byteCount);
position += byteCount;
return this;
}
}