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A library jar that provides APIs for Applications written for the Google Android Platform.
/*
* Copyright (C) 2014 The Android Open Source Project
* Copyright (c) 2000, 2008, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.nio;
import libcore.io.Memory;
/**
* A read/write HeapByteBuffer.
*/
final class HeapByteBuffer extends ByteBuffer {
// For speed these fields are actually declared in X-Buffer;
// these declarations are here as documentation
/*
protected final byte[] hb;
protected final int offset;
*/
HeapByteBuffer(int cap, int lim) { // packag-private
this(cap, lim, false);
}
private HeapByteBuffer(int cap, int lim, boolean isReadOnly) {
super(-1, 0, lim, cap, new byte[cap], 0);
this.isReadOnly = isReadOnly;
}
HeapByteBuffer(byte[] buf, int off, int len) { // package-private
this(buf, off, len, false);
}
private HeapByteBuffer(byte[] buf, int off, int len, boolean isReadOnly) {
super(-1, off, off + len, buf.length, buf, 0);
this.isReadOnly = isReadOnly;
}
private HeapByteBuffer(byte[] buf, int mark, int pos, int lim, int cap, int off,
boolean isReadOnly) {
super(mark, pos, lim, cap, buf, off);
this.isReadOnly = isReadOnly;
}
@Override
public ByteBuffer slice() {
return new HeapByteBuffer(hb,
-1,
0,
remaining(),
remaining(),
position() + offset,
isReadOnly);
}
@Override
public ByteBuffer duplicate() {
return new HeapByteBuffer(hb,
markValue(),
position(),
limit(),
capacity(),
offset,
isReadOnly);
}
@Override
public ByteBuffer asReadOnlyBuffer() {
return new HeapByteBuffer(hb,
this.markValue(),
this.position(),
this.limit(),
this.capacity(),
offset, true);
}
protected int ix(int i) {
return i + offset;
}
@Override
public byte get() {
return hb[ix(nextGetIndex())];
}
@Override
public byte get(int i) {
return hb[ix(checkIndex(i))];
}
@Override
public ByteBuffer get(byte[] dst, int offset, int length) {
checkBounds(offset, length, dst.length);
if (length > remaining())
throw new BufferUnderflowException();
System.arraycopy(hb, ix(position()), dst, offset, length);
position(position() + length);
return this;
}
@Override
public boolean isDirect() {
return false;
}
@Override
public boolean isReadOnly() {
return isReadOnly;
}
@Override
public ByteBuffer put(byte x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
hb[ix(nextPutIndex())] = x;
return this;
}
@Override
public ByteBuffer put(int i, byte x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
hb[ix(checkIndex(i))] = x;
return this;
}
@Override
public ByteBuffer put(byte[] src, int offset, int length) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
checkBounds(offset, length, src.length);
if (length > remaining())
throw new BufferOverflowException();
System.arraycopy(src, offset, hb, ix(position()), length);
position(position() + length);
return this;
}
@Override
public ByteBuffer compact() {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
System.arraycopy(hb, ix(position()), hb, ix(0), remaining());
position(remaining());
limit(capacity());
discardMark();
return this;
}
@Override
byte _get(int i) { // package-private
return hb[i];
}
@Override
void _put(int i, byte b) { // package-private
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
hb[i] = b;
}
@Override
public char getChar() {
return Bits.getChar(this, ix(nextGetIndex(2)), bigEndian);
}
@Override
public char getChar(int i) {
return Bits.getChar(this, ix(checkIndex(i, 2)), bigEndian);
}
@Override
char getCharUnchecked(int i) {
return Bits.getChar(this, ix(i), bigEndian);
}
@Override
void getUnchecked(int pos, char[] dst, int dstOffset, int length) {
Memory.unsafeBulkGet(dst, dstOffset, length * 2, hb, ix(pos), 2, !nativeByteOrder);
}
@Override
public ByteBuffer putChar(char x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
Bits.putChar(this, ix(nextPutIndex(2)), x, bigEndian);
return this;
}
@Override
public ByteBuffer putChar(int i, char x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
Bits.putChar(this, ix(checkIndex(i, 2)), x, bigEndian);
return this;
}
@Override
void putCharUnchecked(int i, char x) {
Bits.putChar(this, ix(i), x, bigEndian);
}
@Override
void putUnchecked(int pos, char[] src, int srcOffset, int length) {
Memory.unsafeBulkPut(hb, ix(pos), length * 2, src, srcOffset, 2, !nativeByteOrder);
}
@Override
public CharBuffer asCharBuffer() {
int size = this.remaining() >> 1;
int off = position();
return new ByteBufferAsCharBuffer(this,
-1,
0,
size,
size,
off,
order());
}
@Override
public short getShort() {
return Bits.getShort(this, ix(nextGetIndex(2)), bigEndian);
}
@Override
public short getShort(int i) {
return Bits.getShort(this, ix(checkIndex(i, 2)), bigEndian);
}
@Override
short getShortUnchecked(int i) {
return Bits.getShort(this, ix(i), bigEndian);
}
@Override
void getUnchecked(int pos, short[] dst, int dstOffset, int length) {
Memory.unsafeBulkGet(dst, dstOffset, length * 2, hb, ix(pos), 2, !nativeByteOrder);
}
@Override
public ByteBuffer putShort(short x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
Bits.putShort(this, ix(nextPutIndex(2)), x, bigEndian);
return this;
}
@Override
public ByteBuffer putShort(int i, short x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
Bits.putShort(this, ix(checkIndex(i, 2)), x, bigEndian);
return this;
}
@Override
void putShortUnchecked(int i, short x) {
Bits.putShort(this, ix(i), x, bigEndian);
}
@Override
void putUnchecked(int pos, short[] src, int srcOffset, int length) {
Memory.unsafeBulkPut(hb, ix(pos), length * 2, src, srcOffset, 2, !nativeByteOrder);
}
@Override
public ShortBuffer asShortBuffer() {
int size = this.remaining() >> 1;
int off = position();
return new ByteBufferAsShortBuffer(this,
-1,
0,
size,
size,
off,
order());
}
@Override
public int getInt() {
return Bits.getInt(this, ix(nextGetIndex(4)), bigEndian);
}
@Override
public int getInt(int i) {
return Bits.getInt(this, ix(checkIndex(i, 4)), bigEndian);
}
@Override
int getIntUnchecked(int i) {
return Bits.getInt(this, ix(i), bigEndian);
}
@Override
void getUnchecked(int pos, int[] dst, int dstOffset, int length) {
Memory.unsafeBulkGet(dst, dstOffset, length * 4, hb, ix(pos), 4, !nativeByteOrder);
}
@Override
public ByteBuffer putInt(int x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
Bits.putInt(this, ix(nextPutIndex(4)), x, bigEndian);
return this;
}
@Override
public ByteBuffer putInt(int i, int x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
Bits.putInt(this, ix(checkIndex(i, 4)), x, bigEndian);
return this;
}
@Override
void putIntUnchecked(int i, int x) {
Bits.putInt(this, ix(i), x, bigEndian);
}
@Override
void putUnchecked(int pos, int[] src, int srcOffset, int length) {
Memory.unsafeBulkPut(hb, ix(pos), length * 4, src, srcOffset, 4, !nativeByteOrder);
}
@Override
public IntBuffer asIntBuffer() {
int size = this.remaining() >> 2;
int off = position();
return new ByteBufferAsIntBuffer(this,
-1,
0,
size,
size,
off,
order());
}
@Override
public long getLong() {
return Bits.getLong(this, ix(nextGetIndex(8)), bigEndian);
}
@Override
public long getLong(int i) {
return Bits.getLong(this, ix(checkIndex(i, 8)), bigEndian);
}
@Override
long getLongUnchecked(int i) {
return Bits.getLong(this, ix(i), bigEndian);
}
@Override
void getUnchecked(int pos, long[] dst, int dstOffset, int length) {
Memory.unsafeBulkGet(dst, dstOffset, length * 8, hb, ix(pos), 8, !nativeByteOrder);
}
@Override
public ByteBuffer putLong(long x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
Bits.putLong(this, ix(nextPutIndex(8)), x, bigEndian);
return this;
}
@Override
public ByteBuffer putLong(int i, long x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
Bits.putLong(this, ix(checkIndex(i, 8)), x, bigEndian);
return this;
}
@Override
void putLongUnchecked(int i, long x) {
Bits.putLong(this, ix(i), x, bigEndian);
}
@Override
void putUnchecked(int pos, long[] src, int srcOffset, int length) {
Memory.unsafeBulkPut(hb, ix(pos), length * 8, src, srcOffset, 8, !nativeByteOrder);
}
@Override
public LongBuffer asLongBuffer() {
int size = this.remaining() >> 3;
int off = position();
return new ByteBufferAsLongBuffer(this,
-1,
0,
size,
size,
off,
order());
}
@Override
public float getFloat() {
return Bits.getFloat(this, ix(nextGetIndex(4)), bigEndian);
}
@Override
public float getFloat(int i) {
return Bits.getFloat(this, ix(checkIndex(i, 4)), bigEndian);
}
@Override
float getFloatUnchecked(int i) {
return Bits.getFloat(this, ix(i), bigEndian);
}
@Override
void getUnchecked(int pos, float[] dst, int dstOffset, int length) {
Memory.unsafeBulkGet(dst, dstOffset, length * 4, hb, ix(pos), 4, !nativeByteOrder);
}
@Override
public ByteBuffer putFloat(float x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
Bits.putFloat(this, ix(nextPutIndex(4)), x, bigEndian);
return this;
}
@Override
public ByteBuffer putFloat(int i, float x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
Bits.putFloat(this, ix(checkIndex(i, 4)), x, bigEndian);
return this;
}
@Override
void putFloatUnchecked(int i, float x) {
Bits.putFloat(this, ix(i), x, bigEndian);
}
@Override
void putUnchecked(int pos, float[] src, int srcOffset, int length) {
Memory.unsafeBulkPut(hb, ix(pos), length * 4, src, srcOffset, 4, !nativeByteOrder);
}
@Override
public FloatBuffer asFloatBuffer() {
int size = this.remaining() >> 2;
int off = position();
return new ByteBufferAsFloatBuffer(this,
-1,
0,
size,
size,
off,
order());
}
@Override
public double getDouble() {
return Bits.getDouble(this, ix(nextGetIndex(8)), bigEndian);
}
@Override
public double getDouble(int i) {
return Bits.getDouble(this, ix(checkIndex(i, 8)), bigEndian);
}
@Override
double getDoubleUnchecked(int i) {
return Bits.getDouble(this, ix(i), bigEndian);
}
@Override
void getUnchecked(int pos, double[] dst, int dstOffset, int length) {
Memory.unsafeBulkGet(dst, dstOffset, length * 8, hb, ix(pos), 8, !nativeByteOrder);
}
@Override
public ByteBuffer putDouble(double x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
Bits.putDouble(this, ix(nextPutIndex(8)), x, bigEndian);
return this;
}
@Override
public ByteBuffer putDouble(int i, double x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
Bits.putDouble(this, ix(checkIndex(i, 8)), x, bigEndian);
return this;
}
@Override
void putDoubleUnchecked(int i, double x) {
Bits.putDouble(this, ix(i), x, bigEndian);
}
@Override
void putUnchecked(int pos, double[] src, int srcOffset, int length) {
Memory.unsafeBulkPut(hb, ix(pos), length * 8, src, srcOffset, 8, !nativeByteOrder);
}
@Override
public DoubleBuffer asDoubleBuffer() {
int size = this.remaining() >> 3;
int off = position();
return new ByteBufferAsDoubleBuffer(this,
-1,
0,
size,
size,
off,
order());
}
}