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1504 lines
28 KiB
1504 lines
28 KiB
/*
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* Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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// -- This file was mechanically generated: Do not edit! -- //
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package java.nio;
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/**
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* A double buffer.
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*
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* <p> This class defines four categories of operations upon
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* double buffers:
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*
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* <ul>
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*
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* <li><p> Absolute and relative {@link #get() <i>get</i>} and
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* {@link #put(double) <i>put</i>} methods that read and write
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* single doubles; </p></li>
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*
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* <li><p> Relative {@link #get(double[]) <i>bulk get</i>}
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* methods that transfer contiguous sequences of doubles from this buffer
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* into an array; and</p></li>
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*
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* <li><p> Relative {@link #put(double[]) <i>bulk put</i>}
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* methods that transfer contiguous sequences of doubles from a
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* double array or some other double
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* buffer into this buffer; and </p></li>
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*
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*
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* <li><p> Methods for {@link #compact compacting}, {@link
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* #duplicate duplicating}, and {@link #slice slicing}
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* a double buffer. </p></li>
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*
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* </ul>
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*
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* <p> Double buffers can be created either by {@link #allocate
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* <i>allocation</i>}, which allocates space for the buffer's
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*
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*
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* content, by {@link #wrap(double[]) <i>wrapping</i>} an existing
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* double array into a buffer, or by creating a
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* <a href="ByteBuffer.html#views"><i>view</i></a> of an existing byte buffer.
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*
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*
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*
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*
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* <p> Like a byte buffer, a double buffer is either <a
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* href="ByteBuffer.html#direct"><i>direct</i> or <i>non-direct</i></a>. A
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* double buffer created via the <tt>wrap</tt> methods of this class will
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* be non-direct. A double buffer created as a view of a byte buffer will
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* be direct if, and only if, the byte buffer itself is direct. Whether or not
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* a double buffer is direct may be determined by invoking the {@link
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* #isDirect isDirect} method. </p>
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*
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*
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*
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*
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* <p> Methods in this class that do not otherwise have a value to return are
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* specified to return the buffer upon which they are invoked. This allows
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* method invocations to be chained.
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*
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*
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*
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* @author Mark Reinhold
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* @author JSR-51 Expert Group
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* @since 1.4
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*/
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public abstract class DoubleBuffer
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extends Buffer
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implements Comparable<DoubleBuffer>
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{
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// These fields are declared here rather than in Heap-X-Buffer in order to
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// reduce the number of virtual method invocations needed to access these
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// values, which is especially costly when coding small buffers.
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//
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final double[] hb; // Non-null only for heap buffers
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final int offset;
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boolean isReadOnly; // Valid only for heap buffers
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// Creates a new buffer with the given mark, position, limit, capacity,
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// backing array, and array offset
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//
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DoubleBuffer(int mark, int pos, int lim, int cap, // package-private
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double[] hb, int offset)
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{
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super(mark, pos, lim, cap);
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this.hb = hb;
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this.offset = offset;
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}
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// Creates a new buffer with the given mark, position, limit, and capacity
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//
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DoubleBuffer(int mark, int pos, int lim, int cap) { // package-private
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this(mark, pos, lim, cap, null, 0);
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}
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/**
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* Allocates a new double buffer.
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*
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* <p> The new buffer's position will be zero, its limit will be its
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* capacity, its mark will be undefined, and each of its elements will be
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* initialized to zero. It will have a {@link #array backing array},
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* and its {@link #arrayOffset array offset} will be zero.
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*
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* @param capacity
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* The new buffer's capacity, in doubles
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*
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* @return The new double buffer
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*
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* @throws IllegalArgumentException
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* If the <tt>capacity</tt> is a negative integer
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*/
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public static DoubleBuffer allocate(int capacity) {
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if (capacity < 0)
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throw new IllegalArgumentException();
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return new HeapDoubleBuffer(capacity, capacity);
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}
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/**
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* Wraps a double array into a buffer.
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*
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* <p> The new buffer will be backed by the given double array;
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* that is, modifications to the buffer will cause the array to be modified
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* and vice versa. The new buffer's capacity will be
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* <tt>array.length</tt>, its position will be <tt>offset</tt>, its limit
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* will be <tt>offset + length</tt>, and its mark will be undefined. Its
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* {@link #array backing array} will be the given array, and
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* its {@link #arrayOffset array offset} will be zero. </p>
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*
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* @param array
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* The array that will back the new buffer
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*
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* @param offset
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* The offset of the subarray to be used; must be non-negative and
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* no larger than <tt>array.length</tt>. The new buffer's position
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* will be set to this value.
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*
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* @param length
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* The length of the subarray to be used;
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* must be non-negative and no larger than
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* <tt>array.length - offset</tt>.
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* The new buffer's limit will be set to <tt>offset + length</tt>.
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*
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* @return The new double buffer
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*
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* @throws IndexOutOfBoundsException
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* If the preconditions on the <tt>offset</tt> and <tt>length</tt>
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* parameters do not hold
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*/
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public static DoubleBuffer wrap(double[] array,
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int offset, int length)
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{
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try {
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return new HeapDoubleBuffer(array, offset, length);
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} catch (IllegalArgumentException x) {
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throw new IndexOutOfBoundsException();
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}
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}
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/**
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* Wraps a double array into a buffer.
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*
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* <p> The new buffer will be backed by the given double array;
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* that is, modifications to the buffer will cause the array to be modified
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* and vice versa. The new buffer's capacity and limit will be
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* <tt>array.length</tt>, its position will be zero, and its mark will be
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* undefined. Its {@link #array backing array} will be the
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* given array, and its {@link #arrayOffset array offset>} will
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* be zero. </p>
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*
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* @param array
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* The array that will back this buffer
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*
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* @return The new double buffer
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*/
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public static DoubleBuffer wrap(double[] array) {
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return wrap(array, 0, array.length);
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}
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/**
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* Creates a new double buffer whose content is a shared subsequence of
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* this buffer's content.
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*
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* <p> The content of the new buffer will start at this buffer's current
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* position. Changes to this buffer's content will be visible in the new
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* buffer, and vice versa; the two buffers' position, limit, and mark
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* values will be independent.
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*
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* <p> The new buffer's position will be zero, its capacity and its limit
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* will be the number of doubles remaining in this buffer, and its mark
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* will be undefined. The new buffer will be direct if, and only if, this
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* buffer is direct, and it will be read-only if, and only if, this buffer
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* is read-only. </p>
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*
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* @return The new double buffer
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*/
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public abstract DoubleBuffer slice();
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/**
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* Creates a new double buffer that shares this buffer's content.
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*
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* <p> The content of the new buffer will be that of this buffer. Changes
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* to this buffer's content will be visible in the new buffer, and vice
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* versa; the two buffers' position, limit, and mark values will be
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* independent.
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*
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* <p> The new buffer's capacity, limit, position, and mark values will be
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* identical to those of this buffer. The new buffer will be direct if,
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* and only if, this buffer is direct, and it will be read-only if, and
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* only if, this buffer is read-only. </p>
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*
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* @return The new double buffer
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*/
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public abstract DoubleBuffer duplicate();
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/**
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* Creates a new, read-only double buffer that shares this buffer's
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* content.
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*
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* <p> The content of the new buffer will be that of this buffer. Changes
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* to this buffer's content will be visible in the new buffer; the new
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* buffer itself, however, will be read-only and will not allow the shared
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* content to be modified. The two buffers' position, limit, and mark
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* values will be independent.
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*
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* <p> The new buffer's capacity, limit, position, and mark values will be
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* identical to those of this buffer.
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*
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* <p> If this buffer is itself read-only then this method behaves in
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* exactly the same way as the {@link #duplicate duplicate} method. </p>
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*
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* @return The new, read-only double buffer
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*/
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public abstract DoubleBuffer asReadOnlyBuffer();
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// -- Singleton get/put methods --
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/**
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* Relative <i>get</i> method. Reads the double at this buffer's
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* current position, and then increments the position.
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*
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* @return The double at the buffer's current position
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*
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* @throws BufferUnderflowException
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* If the buffer's current position is not smaller than its limit
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*/
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public abstract double get();
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/**
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* Relative <i>put</i> method <i>(optional operation)</i>.
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*
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* <p> Writes the given double into this buffer at the current
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* position, and then increments the position. </p>
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*
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* @param d
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* The double to be written
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*
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* @return This buffer
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*
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* @throws BufferOverflowException
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* If this buffer's current position is not smaller than its limit
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*
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* @throws ReadOnlyBufferException
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* If this buffer is read-only
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*/
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public abstract DoubleBuffer put(double d);
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/**
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* Absolute <i>get</i> method. Reads the double at the given
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* index.
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*
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* @param index
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* The index from which the double will be read
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*
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* @return The double at the given index
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*
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* @throws IndexOutOfBoundsException
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* If <tt>index</tt> is negative
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* or not smaller than the buffer's limit
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*/
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public abstract double get(int index);
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/**
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* Absolute <i>put</i> method <i>(optional operation)</i>.
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*
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* <p> Writes the given double into this buffer at the given
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* index. </p>
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*
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* @param index
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* The index at which the double will be written
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*
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* @param d
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* The double value to be written
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*
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* @return This buffer
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*
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* @throws IndexOutOfBoundsException
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* If <tt>index</tt> is negative
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* or not smaller than the buffer's limit
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*
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* @throws ReadOnlyBufferException
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* If this buffer is read-only
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*/
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public abstract DoubleBuffer put(int index, double d);
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// -- Bulk get operations --
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/**
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* Relative bulk <i>get</i> method.
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*
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* <p> This method transfers doubles from this buffer into the given
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* destination array. If there are fewer doubles remaining in the
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* buffer than are required to satisfy the request, that is, if
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* <tt>length</tt> <tt>></tt> <tt>remaining()</tt>, then no
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* doubles are transferred and a {@link BufferUnderflowException} is
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* thrown.
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*
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* <p> Otherwise, this method copies <tt>length</tt> doubles from this
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* buffer into the given array, starting at the current position of this
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* buffer and at the given offset in the array. The position of this
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* buffer is then incremented by <tt>length</tt>.
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*
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* <p> In other words, an invocation of this method of the form
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* <tt>src.get(dst, off, len)</tt> has exactly the same effect as
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* the loop
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*
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* <pre>{@code
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* for (int i = off; i < off + len; i++)
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* dst[i] = src.get():
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* }</pre>
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*
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* except that it first checks that there are sufficient doubles in
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* this buffer and it is potentially much more efficient.
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*
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* @param dst
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* The array into which doubles are to be written
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*
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* @param offset
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* The offset within the array of the first double to be
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* written; must be non-negative and no larger than
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* <tt>dst.length</tt>
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*
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* @param length
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* The maximum number of doubles to be written to the given
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* array; must be non-negative and no larger than
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* <tt>dst.length - offset</tt>
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*
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* @return This buffer
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*
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* @throws BufferUnderflowException
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* If there are fewer than <tt>length</tt> doubles
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* remaining in this buffer
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*
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* @throws IndexOutOfBoundsException
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* If the preconditions on the <tt>offset</tt> and <tt>length</tt>
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* parameters do not hold
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*/
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public DoubleBuffer get(double[] dst, int offset, int length) {
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checkBounds(offset, length, dst.length);
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if (length > remaining())
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throw new BufferUnderflowException();
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int end = offset + length;
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for (int i = offset; i < end; i++)
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dst[i] = get();
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return this;
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}
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|
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/**
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* Relative bulk <i>get</i> method.
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*
|
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* <p> This method transfers doubles from this buffer into the given
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* destination array. An invocation of this method of the form
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* <tt>src.get(a)</tt> behaves in exactly the same way as the invocation
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*
|
|
* <pre>
|
|
* src.get(a, 0, a.length) </pre>
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*
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* @param dst
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* The destination array
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*
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* @return This buffer
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*
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* @throws BufferUnderflowException
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* If there are fewer than <tt>length</tt> doubles
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* remaining in this buffer
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*/
|
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public DoubleBuffer get(double[] dst) {
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return get(dst, 0, dst.length);
|
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}
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|
|
|
|
|
// -- Bulk put operations --
|
|
|
|
/**
|
|
* Relative bulk <i>put</i> method <i>(optional operation)</i>.
|
|
*
|
|
* <p> This method transfers the doubles remaining in the given source
|
|
* buffer into this buffer. If there are more doubles remaining in the
|
|
* source buffer than in this buffer, that is, if
|
|
* <tt>src.remaining()</tt> <tt>></tt> <tt>remaining()</tt>,
|
|
* then no doubles are transferred and a {@link
|
|
* BufferOverflowException} is thrown.
|
|
*
|
|
* <p> Otherwise, this method copies
|
|
* <i>n</i> = <tt>src.remaining()</tt> doubles from the given
|
|
* buffer into this buffer, starting at each buffer's current position.
|
|
* The positions of both buffers are then incremented by <i>n</i>.
|
|
*
|
|
* <p> In other words, an invocation of this method of the form
|
|
* <tt>dst.put(src)</tt> has exactly the same effect as the loop
|
|
*
|
|
* <pre>
|
|
* while (src.hasRemaining())
|
|
* dst.put(src.get()); </pre>
|
|
*
|
|
* except that it first checks that there is sufficient space in this
|
|
* buffer and it is potentially much more efficient.
|
|
*
|
|
* @param src
|
|
* The source buffer from which doubles are to be read;
|
|
* must not be this buffer
|
|
*
|
|
* @return This buffer
|
|
*
|
|
* @throws BufferOverflowException
|
|
* If there is insufficient space in this buffer
|
|
* for the remaining doubles in the source buffer
|
|
*
|
|
* @throws IllegalArgumentException
|
|
* If the source buffer is this buffer
|
|
*
|
|
* @throws ReadOnlyBufferException
|
|
* If this buffer is read-only
|
|
*/
|
|
public DoubleBuffer put(DoubleBuffer src) {
|
|
if (src == this)
|
|
throw new IllegalArgumentException();
|
|
if (isReadOnly())
|
|
throw new ReadOnlyBufferException();
|
|
int n = src.remaining();
|
|
if (n > remaining())
|
|
throw new BufferOverflowException();
|
|
for (int i = 0; i < n; i++)
|
|
put(src.get());
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Relative bulk <i>put</i> method <i>(optional operation)</i>.
|
|
*
|
|
* <p> This method transfers doubles into this buffer from the given
|
|
* source array. If there are more doubles to be copied from the array
|
|
* than remain in this buffer, that is, if
|
|
* <tt>length</tt> <tt>></tt> <tt>remaining()</tt>, then no
|
|
* doubles are transferred and a {@link BufferOverflowException} is
|
|
* thrown.
|
|
*
|
|
* <p> Otherwise, this method copies <tt>length</tt> doubles from the
|
|
* given array into this buffer, starting at the given offset in the array
|
|
* and at the current position of this buffer. The position of this buffer
|
|
* is then incremented by <tt>length</tt>.
|
|
*
|
|
* <p> In other words, an invocation of this method of the form
|
|
* <tt>dst.put(src, off, len)</tt> has exactly the same effect as
|
|
* the loop
|
|
*
|
|
* <pre>{@code
|
|
* for (int i = off; i < off + len; i++)
|
|
* dst.put(a[i]);
|
|
* }</pre>
|
|
*
|
|
* except that it first checks that there is sufficient space in this
|
|
* buffer and it is potentially much more efficient.
|
|
*
|
|
* @param src
|
|
* The array from which doubles are to be read
|
|
*
|
|
* @param offset
|
|
* The offset within the array of the first double to be read;
|
|
* must be non-negative and no larger than <tt>array.length</tt>
|
|
*
|
|
* @param length
|
|
* The number of doubles to be read from the given array;
|
|
* must be non-negative and no larger than
|
|
* <tt>array.length - offset</tt>
|
|
*
|
|
* @return This buffer
|
|
*
|
|
* @throws BufferOverflowException
|
|
* If there is insufficient space in this buffer
|
|
*
|
|
* @throws IndexOutOfBoundsException
|
|
* If the preconditions on the <tt>offset</tt> and <tt>length</tt>
|
|
* parameters do not hold
|
|
*
|
|
* @throws ReadOnlyBufferException
|
|
* If this buffer is read-only
|
|
*/
|
|
public DoubleBuffer put(double[] src, int offset, int length) {
|
|
checkBounds(offset, length, src.length);
|
|
if (length > remaining())
|
|
throw new BufferOverflowException();
|
|
int end = offset + length;
|
|
for (int i = offset; i < end; i++)
|
|
this.put(src[i]);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Relative bulk <i>put</i> method <i>(optional operation)</i>.
|
|
*
|
|
* <p> This method transfers the entire content of the given source
|
|
* double array into this buffer. An invocation of this method of the
|
|
* form <tt>dst.put(a)</tt> behaves in exactly the same way as the
|
|
* invocation
|
|
*
|
|
* <pre>
|
|
* dst.put(a, 0, a.length) </pre>
|
|
*
|
|
* @param src
|
|
* The source array
|
|
*
|
|
* @return This buffer
|
|
*
|
|
* @throws BufferOverflowException
|
|
* If there is insufficient space in this buffer
|
|
*
|
|
* @throws ReadOnlyBufferException
|
|
* If this buffer is read-only
|
|
*/
|
|
public final DoubleBuffer put(double[] src) {
|
|
return put(src, 0, src.length);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// -- Other stuff --
|
|
|
|
/**
|
|
* Tells whether or not this buffer is backed by an accessible double
|
|
* array.
|
|
*
|
|
* <p> If this method returns <tt>true</tt> then the {@link #array() array}
|
|
* and {@link #arrayOffset() arrayOffset} methods may safely be invoked.
|
|
* </p>
|
|
*
|
|
* @return <tt>true</tt> if, and only if, this buffer
|
|
* is backed by an array and is not read-only
|
|
*/
|
|
public final boolean hasArray() {
|
|
return (hb != null) && !isReadOnly;
|
|
}
|
|
|
|
/**
|
|
* Returns the double array that backs this
|
|
* buffer <i>(optional operation)</i>.
|
|
*
|
|
* <p> Modifications to this buffer's content will cause the returned
|
|
* array's content to be modified, and vice versa.
|
|
*
|
|
* <p> Invoke the {@link #hasArray hasArray} method before invoking this
|
|
* method in order to ensure that this buffer has an accessible backing
|
|
* array. </p>
|
|
*
|
|
* @return The array that backs this buffer
|
|
*
|
|
* @throws ReadOnlyBufferException
|
|
* If this buffer is backed by an array but is read-only
|
|
*
|
|
* @throws UnsupportedOperationException
|
|
* If this buffer is not backed by an accessible array
|
|
*/
|
|
public final double[] array() {
|
|
if (hb == null)
|
|
throw new UnsupportedOperationException();
|
|
if (isReadOnly)
|
|
throw new ReadOnlyBufferException();
|
|
return hb;
|
|
}
|
|
|
|
/**
|
|
* Returns the offset within this buffer's backing array of the first
|
|
* element of the buffer <i>(optional operation)</i>.
|
|
*
|
|
* <p> If this buffer is backed by an array then buffer position <i>p</i>
|
|
* corresponds to array index <i>p</i> + <tt>arrayOffset()</tt>.
|
|
*
|
|
* <p> Invoke the {@link #hasArray hasArray} method before invoking this
|
|
* method in order to ensure that this buffer has an accessible backing
|
|
* array. </p>
|
|
*
|
|
* @return The offset within this buffer's array
|
|
* of the first element of the buffer
|
|
*
|
|
* @throws ReadOnlyBufferException
|
|
* If this buffer is backed by an array but is read-only
|
|
*
|
|
* @throws UnsupportedOperationException
|
|
* If this buffer is not backed by an accessible array
|
|
*/
|
|
public final int arrayOffset() {
|
|
if (hb == null)
|
|
throw new UnsupportedOperationException();
|
|
if (isReadOnly)
|
|
throw new ReadOnlyBufferException();
|
|
return offset;
|
|
}
|
|
|
|
/**
|
|
* Compacts this buffer <i>(optional operation)</i>.
|
|
*
|
|
* <p> The doubles between the buffer's current position and its limit,
|
|
* if any, are copied to the beginning of the buffer. That is, the
|
|
* double at index <i>p</i> = <tt>position()</tt> is copied
|
|
* to index zero, the double at index <i>p</i> + 1 is copied
|
|
* to index one, and so forth until the double at index
|
|
* <tt>limit()</tt> - 1 is copied to index
|
|
* <i>n</i> = <tt>limit()</tt> - <tt>1</tt> - <i>p</i>.
|
|
* The buffer's position is then set to <i>n+1</i> and its limit is set to
|
|
* its capacity. The mark, if defined, is discarded.
|
|
*
|
|
* <p> The buffer's position is set to the number of doubles copied,
|
|
* rather than to zero, so that an invocation of this method can be
|
|
* followed immediately by an invocation of another relative <i>put</i>
|
|
* method. </p>
|
|
*
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
*
|
|
* @return This buffer
|
|
*
|
|
* @throws ReadOnlyBufferException
|
|
* If this buffer is read-only
|
|
*/
|
|
public abstract DoubleBuffer compact();
|
|
|
|
/**
|
|
* Tells whether or not this double buffer is direct.
|
|
*
|
|
* @return <tt>true</tt> if, and only if, this buffer is direct
|
|
*/
|
|
public abstract boolean isDirect();
|
|
|
|
|
|
|
|
/**
|
|
* Returns a string summarizing the state of this buffer.
|
|
*
|
|
* @return A summary string
|
|
*/
|
|
public String toString() {
|
|
StringBuffer sb = new StringBuffer();
|
|
sb.append(getClass().getName());
|
|
sb.append("[pos=");
|
|
sb.append(position());
|
|
sb.append(" lim=");
|
|
sb.append(limit());
|
|
sb.append(" cap=");
|
|
sb.append(capacity());
|
|
sb.append("]");
|
|
return sb.toString();
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Returns the current hash code of this buffer.
|
|
*
|
|
* <p> The hash code of a double buffer depends only upon its remaining
|
|
* elements; that is, upon the elements from <tt>position()</tt> up to, and
|
|
* including, the element at <tt>limit()</tt> - <tt>1</tt>.
|
|
*
|
|
* <p> Because buffer hash codes are content-dependent, it is inadvisable
|
|
* to use buffers as keys in hash maps or similar data structures unless it
|
|
* is known that their contents will not change. </p>
|
|
*
|
|
* @return The current hash code of this buffer
|
|
*/
|
|
public int hashCode() {
|
|
int h = 1;
|
|
int p = position();
|
|
for (int i = limit() - 1; i >= p; i--)
|
|
|
|
|
|
|
|
h = 31 * h + (int)get(i);
|
|
|
|
return h;
|
|
}
|
|
|
|
/**
|
|
* Tells whether or not this buffer is equal to another object.
|
|
*
|
|
* <p> Two double buffers are equal if, and only if,
|
|
*
|
|
* <ol>
|
|
*
|
|
* <li><p> They have the same element type, </p></li>
|
|
*
|
|
* <li><p> They have the same number of remaining elements, and
|
|
* </p></li>
|
|
*
|
|
* <li><p> The two sequences of remaining elements, considered
|
|
* independently of their starting positions, are pointwise equal.
|
|
|
|
* This method considers two double elements {@code a} and {@code b}
|
|
* to be equal if
|
|
* {@code (a == b) || (Double.isNaN(a) && Double.isNaN(b))}.
|
|
* The values {@code -0.0} and {@code +0.0} are considered to be
|
|
* equal, unlike {@link Double#equals(Object)}.
|
|
|
|
* </p></li>
|
|
*
|
|
* </ol>
|
|
*
|
|
* <p> A double buffer is not equal to any other type of object. </p>
|
|
*
|
|
* @param ob The object to which this buffer is to be compared
|
|
*
|
|
* @return <tt>true</tt> if, and only if, this buffer is equal to the
|
|
* given object
|
|
*/
|
|
public boolean equals(Object ob) {
|
|
if (this == ob)
|
|
return true;
|
|
if (!(ob instanceof DoubleBuffer))
|
|
return false;
|
|
DoubleBuffer that = (DoubleBuffer)ob;
|
|
if (this.remaining() != that.remaining())
|
|
return false;
|
|
int p = this.position();
|
|
for (int i = this.limit() - 1, j = that.limit() - 1; i >= p; i--, j--)
|
|
if (!equals(this.get(i), that.get(j)))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
private static boolean equals(double x, double y) {
|
|
|
|
return (x == y) || (Double.isNaN(x) && Double.isNaN(y));
|
|
|
|
|
|
|
|
}
|
|
|
|
/**
|
|
* Compares this buffer to another.
|
|
*
|
|
* <p> Two double buffers are compared by comparing their sequences of
|
|
* remaining elements lexicographically, without regard to the starting
|
|
* position of each sequence within its corresponding buffer.
|
|
|
|
* Pairs of {@code double} elements are compared as if by invoking
|
|
* {@link Double#compare(double,double)}, except that
|
|
* {@code -0.0} and {@code 0.0} are considered to be equal.
|
|
* {@code Double.NaN} is considered by this method to be equal
|
|
* to itself and greater than all other {@code double} values
|
|
* (including {@code Double.POSITIVE_INFINITY}).
|
|
|
|
|
|
|
|
|
|
*
|
|
* <p> A double buffer is not comparable to any other type of object.
|
|
*
|
|
* @return A negative integer, zero, or a positive integer as this buffer
|
|
* is less than, equal to, or greater than the given buffer
|
|
*/
|
|
public int compareTo(DoubleBuffer that) {
|
|
int n = this.position() + Math.min(this.remaining(), that.remaining());
|
|
for (int i = this.position(), j = that.position(); i < n; i++, j++) {
|
|
int cmp = compare(this.get(i), that.get(j));
|
|
if (cmp != 0)
|
|
return cmp;
|
|
}
|
|
return this.remaining() - that.remaining();
|
|
}
|
|
|
|
private static int compare(double x, double y) {
|
|
|
|
return ((x < y) ? -1 :
|
|
(x > y) ? +1 :
|
|
(x == y) ? 0 :
|
|
Double.isNaN(x) ? (Double.isNaN(y) ? 0 : +1) : -1);
|
|
|
|
|
|
|
|
}
|
|
|
|
// -- Other char stuff --
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
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|
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|
|
|
|
|
|
|
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|
|
|
|
|
|
|
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|
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|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
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|
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|
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|
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|
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|
|
|
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|
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|
|
|
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|
|
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|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
// -- Other byte stuff: Access to binary data --
|
|
|
|
|
|
|
|
/**
|
|
* Retrieves this buffer's byte order.
|
|
*
|
|
* <p> The byte order of a double buffer created by allocation or by
|
|
* wrapping an existing <tt>double</tt> array is the {@link
|
|
* ByteOrder#nativeOrder native order} of the underlying
|
|
* hardware. The byte order of a double buffer created as a <a
|
|
* href="ByteBuffer.html#views">view</a> of a byte buffer is that of the
|
|
* byte buffer at the moment that the view is created. </p>
|
|
*
|
|
* @return This buffer's byte order
|
|
*/
|
|
public abstract ByteOrder order();
|
|
|
|
|
|
|
|
|
|
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}
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