/** Copyright (c) 2000, 2018, 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.*/// -- This file was mechanically generated: Do not edit! -- //package java.nio;import jdk.internal.util.ArraysSupport;/*** A float buffer.** <p> This class defines four categories of operations upon* float buffers:** <ul>** <li><p> Absolute and relative {@link #get() <i>get</i>} and* {@link #put(float) <i>put</i>} methods that read and write* single floats; </p></li>** <li><p> Relative {@link #get(float[]) <i>bulk get</i>}* methods that transfer contiguous sequences of floats from this buffer* into an array; and</p></li>** <li><p> Relative {@link #put(float[]) <i>bulk put</i>}* methods that transfer contiguous sequences of floats from a* float array or some other float* buffer into this buffer; and </p></li>*** <li><p> A method for {@link #compact compacting}* a float buffer. </p></li>** </ul>** <p> Float buffers can be created either by {@link #allocate* <i>allocation</i>}, which allocates space for the buffer's*** content, by {@link #wrap(float[]) <i>wrapping</i>} an existing* float array into a buffer, or by creating a* <a href="ByteBuffer.html#views"><i>view</i></a> of an existing byte buffer.***** <p> Like a byte buffer, a float buffer is either <a* href="ByteBuffer.html#direct"><i>direct</i> or <i>non-direct</i></a>. A* float buffer created via the {@code wrap} methods of this class will* be non-direct. A float buffer created as a view of a byte buffer will* be direct if, and only if, the byte buffer itself is direct. Whether or not* a float buffer is direct may be determined by invoking the {@link* #isDirect isDirect} method. </p>***** <p> Methods in this class that do not otherwise have a value to return are* specified to return the buffer upon which they are invoked. This allows* method invocations to be chained.**** @author Mark Reinhold* @author JSR-51 Expert Group* @since 1.4*/public abstract class FloatBufferextends Bufferimplements Comparable<FloatBuffer>{// These fields are declared here rather than in Heap-X-Buffer in order to// reduce the number of virtual method invocations needed to access these// values, which is especially costly when coding small buffers.//final float[] hb; // Non-null only for heap buffersfinal int offset;boolean isReadOnly;// Creates a new buffer with the given mark, position, limit, capacity,// backing array, and array offset//FloatBuffer(int mark, int pos, int lim, int cap, // package-privatefloat[] hb, int offset){super(mark, pos, lim, cap);this.hb = hb;this.offset = offset;}// Creates a new buffer with the given mark, position, limit, and capacity//FloatBuffer(int mark, int pos, int lim, int cap) { // package-privatethis(mark, pos, lim, cap, null, 0);}@OverrideObject base() {return hb;}/*** Allocates a new float buffer.** <p> The new buffer's position will be zero, its limit will be its* capacity, its mark will be undefined, each of its elements will be* initialized to zero, and its byte order will be* the {@link ByteOrder#nativeOrder native order} of the underlying* hardware.* It will have a {@link #array backing array}, and its* {@link #arrayOffset array offset} will be zero.** @param capacity* The new buffer's capacity, in floats** @return The new float buffer** @throws IllegalArgumentException* If the {@code capacity} is a negative integer*/public static FloatBuffer allocate(int capacity) {if (capacity < 0)throw createCapacityException(capacity);return new HeapFloatBuffer(capacity, capacity);}/*** Wraps a float array into a buffer.** <p> The new buffer will be backed by the given float array;* that is, modifications to the buffer will cause the array to be modified* and vice versa. The new buffer's capacity will be* {@code array.length}, its position will be {@code offset}, its limit* will be {@code offset + length}, its mark will be undefined, and its* byte order will be* the {@link ByteOrder#nativeOrder native order} of the underlying* hardware.* Its {@link #array backing array} will be the given array, and* its {@link #arrayOffset array offset} will be zero. </p>** @param array* The array that will back the new buffer** @param offset* The offset of the subarray to be used; must be non-negative and* no larger than {@code array.length}. The new buffer's position* will be set to this value.** @param length* The length of the subarray to be used;* must be non-negative and no larger than* {@code array.length - offset}.* The new buffer's limit will be set to {@code offset + length}.** @return The new float buffer** @throws IndexOutOfBoundsException* If the preconditions on the {@code offset} and {@code length}* parameters do not hold*/public static FloatBuffer wrap(float[] array,int offset, int length){try {return new HeapFloatBuffer(array, offset, length);} catch (IllegalArgumentException x) {throw new IndexOutOfBoundsException();}}/*** Wraps a float array into a buffer.** <p> The new buffer will be backed by the given float array;* that is, modifications to the buffer will cause the array to be modified* and vice versa. The new buffer's capacity and limit will be* {@code array.length}, its position will be zero, its mark will be* undefined, and its byte order will be* the {@link ByteOrder#nativeOrder native order} of the underlying* hardware.* Its {@link #array backing array} will be the given array, and its* {@link #arrayOffset array offset} will be zero. </p>** @param array* The array that will back this buffer** @return The new float buffer*/public static FloatBuffer wrap(float[] array) {return wrap(array, 0, array.length);}/*** Creates a new float buffer whose content is a shared subsequence of* this buffer's content.** <p> The content of the new buffer will start at this buffer's current* position. Changes to this buffer's content will be visible in the new* buffer, and vice versa; the two buffers' position, limit, and mark* values will be independent.** <p> The new buffer's position will be zero, its capacity and its limit* will be the number of floats remaining in this buffer, its mark will be* undefined, and its byte order will be* identical to that of this buffer.* The new buffer will be direct if, and only if, this buffer is direct, and* it will be read-only if, and only if, this buffer is read-only. </p>** @return The new float buffer*/@Overridepublic abstract FloatBuffer slice();/*** Creates a new float buffer that shares this buffer's content.** <p> The content of the new buffer will be that of this buffer. Changes* to this buffer's content will be visible in the new buffer, and vice* versa; the two buffers' position, limit, and mark values will be* independent.** <p> The new buffer's capacity, limit, position,* mark values, and byte order will be identical to those of this buffer.* The new buffer will be direct if, and only if, this buffer is direct, and* it will be read-only if, and only if, this buffer is read-only. </p>** @return The new float buffer*/@Overridepublic abstract FloatBuffer duplicate();/*** Creates a new, read-only float buffer that shares this buffer's* content.** <p> The content of the new buffer will be that of this buffer. Changes* to this buffer's content will be visible in the new buffer; the new* buffer itself, however, will be read-only and will not allow the shared* content to be modified. The two buffers' position, limit, and mark* values will be independent.** <p> The new buffer's capacity, limit, position,* mark values, and byte order will be identical to those of this buffer.** <p> If this buffer is itself read-only then this method behaves in* exactly the same way as the {@link #duplicate duplicate} method. </p>** @return The new, read-only float buffer*/public abstract FloatBuffer asReadOnlyBuffer();// -- Singleton get/put methods --/*** Relative <i>get</i> method. Reads the float at this buffer's* current position, and then increments the position.** @return The float at the buffer's current position** @throws BufferUnderflowException* If the buffer's current position is not smaller than its limit*/public abstract float get();/*** Relative <i>put</i> method <i>(optional operation)</i>.** <p> Writes the given float into this buffer at the current* position, and then increments the position. </p>** @param f* The float to be written** @return This buffer** @throws BufferOverflowException* If this buffer's current position is not smaller than its limit** @throws ReadOnlyBufferException* If this buffer is read-only*/public abstract FloatBuffer put(float f);/*** Absolute <i>get</i> method. Reads the float at the given* index.** @param index* The index from which the float will be read** @return The float at the given index** @throws IndexOutOfBoundsException* If {@code index} is negative* or not smaller than the buffer's limit*/public abstract float get(int index);/*** Absolute <i>put</i> method <i>(optional operation)</i>.** <p> Writes the given float into this buffer at the given* index. </p>** @param index* The index at which the float will be written** @param f* The float value to be written** @return This buffer** @throws IndexOutOfBoundsException* If {@code index} is negative* or not smaller than the buffer's limit** @throws ReadOnlyBufferException* If this buffer is read-only*/public abstract FloatBuffer put(int index, float f);// -- Bulk get operations --/*** Relative bulk <i>get</i> method.** <p> This method transfers floats from this buffer into the given* destination array. If there are fewer floats remaining in the* buffer than are required to satisfy the request, that is, if* {@code length} {@code >} {@code remaining()}, then no* floats are transferred and a {@link BufferUnderflowException} is* thrown.** <p> Otherwise, this method copies {@code length} floats from this* buffer into the given array, starting at the current position of this* buffer and at the given offset in the array. The position of this* buffer is then incremented by {@code length}.** <p> In other words, an invocation of this method of the form* <code>src.get(dst, off, len)</code> has exactly the same effect as* the loop** <pre>{@code* for (int i = off; i < off + len; i++)* dst[i] = src.get();* }</pre>** except that it first checks that there are sufficient floats in* this buffer and it is potentially much more efficient.** @param dst* The array into which floats are to be written** @param offset* The offset within the array of the first float to be* written; must be non-negative and no larger than* {@code dst.length}** @param length* The maximum number of floats to be written to the given* array; must be non-negative and no larger than* {@code dst.length - offset}** @return This buffer** @throws BufferUnderflowException* If there are fewer than {@code length} floats* remaining in this buffer** @throws IndexOutOfBoundsException* If the preconditions on the {@code offset} and {@code length}* parameters do not hold*/public FloatBuffer get(float[] dst, int offset, int length) {checkBounds(offset, length, dst.length);if (length > remaining())throw new BufferUnderflowException();int end = offset + length;for (int i = offset; i < end; i++)dst[i] = get();return this;}/*** Relative bulk <i>get</i> method.** <p> This method transfers floats from this buffer into the given* destination array. An invocation of this method of the form* {@code src.get(a)} behaves in exactly the same way as the invocation** <pre>* src.get(a, 0, a.length) </pre>** @param dst* The destination array** @return This buffer** @throws BufferUnderflowException* If there are fewer than {@code length} floats* remaining in this buffer*/public FloatBuffer get(float[] dst) {return get(dst, 0, dst.length);}// -- Bulk put operations --/*** Relative bulk <i>put</i> method <i>(optional operation)</i>.** <p> This method transfers the floats remaining in the given source* buffer into this buffer. If there are more floats remaining in the* source buffer than in this buffer, that is, if* {@code src.remaining()} {@code >} {@code remaining()},* then no floats are transferred and a {@link* BufferOverflowException} is thrown.** <p> Otherwise, this method copies* <i>n</i> = {@code src.remaining()} floats 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* {@code dst.put(src)} 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 floats 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 floats in the source buffer** @throws IllegalArgumentException* If the source buffer is this buffer** @throws ReadOnlyBufferException* If this buffer is read-only*/public FloatBuffer put(FloatBuffer src) {if (src == this)throw createSameBufferException();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 floats into this buffer from the given* source array. If there are more floats to be copied from the array* than remain in this buffer, that is, if* {@code length} {@code >} {@code remaining()}, then no* floats are transferred and a {@link BufferOverflowException} is* thrown.** <p> Otherwise, this method copies {@code length} floats 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 {@code length}.** <p> In other words, an invocation of this method of the form* <code>dst.put(src, off, len)</code> 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 floats are to be read** @param offset* The offset within the array of the first float to be read;* must be non-negative and no larger than {@code array.length}** @param length* The number of floats to be read from the given array;* must be non-negative and no larger than* {@code array.length - offset}** @return This buffer** @throws BufferOverflowException* If there is insufficient space in this buffer** @throws IndexOutOfBoundsException* If the preconditions on the {@code offset} and {@code length}* parameters do not hold** @throws ReadOnlyBufferException* If this buffer is read-only*/public FloatBuffer put(float[] 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* float array into this buffer. An invocation of this method of the* form {@code dst.put(a)} 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 FloatBuffer put(float[] src) {return put(src, 0, src.length);}// -- Other stuff --/*** Tells whether or not this buffer is backed by an accessible float* array.** <p> If this method returns {@code true} then the {@link #array() array}* and {@link #arrayOffset() arrayOffset} methods may safely be invoked.* </p>** @return {@code true} 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 float 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 float[] 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> + {@code arrayOffset()}.** <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;}// -- Covariant return type overrides/*** {@inheritDoc}*/@OverridepublicfinalFloatBuffer position(int newPosition) {super.position(newPosition);return this;}/*** {@inheritDoc}*/@OverridepublicfinalFloatBuffer limit(int newLimit) {super.limit(newLimit);return this;}/*** {@inheritDoc}*/@OverridepublicfinalFloatBuffer mark() {super.mark();return this;}/*** {@inheritDoc}*/@OverridepublicfinalFloatBuffer reset() {super.reset();return this;}/*** {@inheritDoc}*/@OverridepublicfinalFloatBuffer clear() {super.clear();return this;}/*** {@inheritDoc}*/@OverridepublicfinalFloatBuffer flip() {super.flip();return this;}/*** {@inheritDoc}*/@OverridepublicfinalFloatBuffer rewind() {super.rewind();return this;}/*** Compacts this buffer <i>(optional operation)</i>.** <p> The floats between the buffer's current position and its limit,* if any, are copied to the beginning of the buffer. That is, the* float at index <i>p</i> = {@code position()} is copied* to index zero, the float at index <i>p</i> + 1 is copied* to index one, and so forth until the float at index* {@code limit()} - 1 is copied to index* <i>n</i> = {@code limit()} - {@code 1} - <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 floats 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 FloatBuffer compact();/*** Tells whether or not this float buffer is direct.** @return {@code true} 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 float buffer depends only upon its remaining* elements; that is, upon the elements from {@code position()} up to, and* including, the element at {@code limit()} - {@code 1}.** <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 float 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 float elements {@code a} and {@code b}* to be equal if* {@code (a == b) || (Float.isNaN(a) && Float.isNaN(b))}.* The values {@code -0.0} and {@code +0.0} are considered to be* equal, unlike {@link Float#equals(Object)}.* </p></li>** </ol>** <p> A float buffer is not equal to any other type of object. </p>** @param ob The object to which this buffer is to be compared** @return {@code true} 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 FloatBuffer))return false;FloatBuffer that = (FloatBuffer)ob;if (this.remaining() != that.remaining())return false;return BufferMismatch.mismatch(this, this.position(),that, that.position(),this.remaining()) < 0;}/*** Compares this buffer to another.** <p> Two float 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 float} elements are compared as if by invoking* {@link Float#compare(float,float)}, except that* {@code -0.0} and {@code 0.0} are considered to be equal.* {@code Float.NaN} is considered by this method to be equal* to itself and greater than all other {@code float} values* (including {@code Float.POSITIVE_INFINITY}).** <p> A float 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(FloatBuffer that) {int i = BufferMismatch.mismatch(this, this.position(),that, that.position(),Math.min(this.remaining(), that.remaining()));if (i >= 0) {return compare(this.get(this.position() + i), that.get(that.position() + i));}return this.remaining() - that.remaining();}private static int compare(float x, float y) {return ((x < y) ? -1 :(x > y) ? +1 :(x == y) ? 0 :Float.isNaN(x) ? (Float.isNaN(y) ? 0 : +1) : -1);}/*** Finds and returns the relative index of the first mismatch between this* buffer and a given buffer. The index is relative to the* {@link #position() position} of each buffer and will be in the range of* 0 (inclusive) up to the smaller of the {@link #remaining() remaining}* elements in each buffer (exclusive).** <p> If the two buffers share a common prefix then the returned index is* the length of the common prefix and it follows that there is a mismatch* between the two buffers at that index within the respective buffers.* If one buffer is a proper prefix of the other then the returned index is* the smaller of the remaining elements in each buffer, and it follows that* the index is only valid for the buffer with the larger number of* remaining elements.* Otherwise, there is no mismatch.** @param that* The byte buffer to be tested for a mismatch with this buffer** @return The relative index of the first mismatch between this and the* given buffer, otherwise -1 if no mismatch.** @since 11*/public int mismatch(FloatBuffer that) {int length = Math.min(this.remaining(), that.remaining());int r = BufferMismatch.mismatch(this, this.position(),that, that.position(),length);return (r == -1 && this.remaining() != that.remaining()) ? length : r;}// -- Other char stuff --// -- Other byte stuff: Access to binary data --/*** Retrieves this buffer's byte order.** <p> The byte order of a float buffer created by allocation or by* wrapping an existing {@code float} array is the {@link* ByteOrder#nativeOrder native order} of the underlying* hardware. The byte order of a float 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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