java.nio.HeapDoubleBuffer Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of android-all Show documentation
Show all versions of android-all Show documentation
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;
/**
* A read/write HeapDoubleBuffer.
*/
class HeapDoubleBuffer extends DoubleBuffer {
// For speed these fields are actually declared in X-Buffer;
// these declarations are here as documentation
/*
protected final double[] hb;
protected final int offset;
*/
HeapDoubleBuffer(int cap, int lim) { // package-private
this(cap, lim, false);
}
HeapDoubleBuffer(double[] buf, int off, int len) { // package-private
this(buf, off, len, false);
}
protected HeapDoubleBuffer(double[] buf,
int mark, int pos, int lim, int cap,
int off) {
this(buf, mark, pos, lim, cap, off, false);
}
HeapDoubleBuffer(int cap, int lim, boolean isReadOnly) { // package-private
super(-1, 0, lim, cap, new double[cap], 0);
this.isReadOnly = isReadOnly;
}
HeapDoubleBuffer(double[] buf, int off, int len, boolean isReadOnly) { // package-private
super(-1, off, off + len, buf.length, buf, 0);
this.isReadOnly = isReadOnly;
}
protected HeapDoubleBuffer(double[] buf,
int mark, int pos, int lim, int cap,
int off, boolean isReadOnly) {
super(mark, pos, lim, cap, buf, off);
this.isReadOnly = isReadOnly;
}
public DoubleBuffer slice() {
return new HeapDoubleBuffer(hb,
-1,
0,
this.remaining(),
this.remaining(),
this.position() + offset,
isReadOnly);
}
public DoubleBuffer duplicate() {
return new HeapDoubleBuffer(hb,
this.markValue(),
this.position(),
this.limit(),
this.capacity(),
offset,
isReadOnly);
}
public DoubleBuffer asReadOnlyBuffer() {
return new HeapDoubleBuffer(hb,
this.markValue(),
this.position(),
this.limit(),
this.capacity(),
offset, true);
}
protected int ix(int i) {
return i + offset;
}
public double get() {
return hb[ix(nextGetIndex())];
}
public double get(int i) {
return hb[ix(checkIndex(i))];
}
public DoubleBuffer get(double[] 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;
}
public boolean isDirect() {
return false;
}
public boolean isReadOnly() {
return isReadOnly;
}
public DoubleBuffer put(double x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
hb[ix(nextPutIndex())] = x;
return this;
}
public DoubleBuffer put(int i, double x) {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
hb[ix(checkIndex(i))] = x;
return this;
}
public DoubleBuffer put(double[] 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;
}
public DoubleBuffer put(DoubleBuffer src) {
if (src == this) {
throw new IllegalArgumentException();
}
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
if (src instanceof HeapDoubleBuffer) {
HeapDoubleBuffer sb = (HeapDoubleBuffer)src;
int n = sb.remaining();
if (n > remaining())
throw new BufferOverflowException();
System.arraycopy(sb.hb, sb.ix(sb.position()),
hb, ix(position()), n);
sb.position(sb.position() + n);
position(position() + n);
} else if (src.isDirect()) {
int n = src.remaining();
if (n > remaining())
throw new BufferOverflowException();
src.get(hb, ix(position()), n);
position(position() + n);
} else {
super.put(src);
}
return this;
}
public DoubleBuffer compact() {
if (isReadOnly) {
throw new ReadOnlyBufferException();
}
System.arraycopy(hb, ix(position()), hb, ix(0), remaining());
position(remaining());
limit(capacity());
discardMark();
return this;
}
public ByteOrder order() {
return ByteOrder.nativeOrder();
}
}