jdk8-mips64-public/nashorn: src/jdk/nashorn/internal/objects/NativeUint16Array.java@b1980b5f00a1 (annotated)

src/jdk/nashorn/internal/objects/NativeUint16Array.java@b1980b5f00a1 (annotated)

src/jdk/nashorn/internal/objects/NativeUint16Array.java

Wed, 03 Jul 2013 13:03:36 +0200

author: lagergren
date: Wed, 03 Jul 2013 13:03:36 +0200
changeset 405: b1980b5f00a1
parent 380: 80c66d3fd872
child 414: ec84ba68ad39
permissions: -rw-r--r--

8019585: Sometimes a var declaration using itself in its init wasn't declared as canBeUndefined, causing erroneous bytecode
Reviewed-by: sundar, attila

 /*
  * Copyright (c) 2010, 2013, 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 jdk.nashorn.internal.objects;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Constructor;
 import jdk.nashorn.internal.objects.annotations.Function;
 import jdk.nashorn.internal.objects.annotations.Property;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
 import jdk.nashorn.internal.objects.annotations.Where;
 import jdk.nashorn.internal.runtime.PropertyMap;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.arrays.ArrayData;
 /**
  * Uint16 array for TypedArray extension
  */
 @ScriptClass("Uint16Array")
 public final class NativeUint16Array extends ArrayBufferView {
     /**
      * The size in bytes of each element in the array.
      */
     @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE, where = Where.CONSTRUCTOR)
     public static final int BYTES_PER_ELEMENT = 2;
     // initialized by nasgen
     @SuppressWarnings("unused")
     private static PropertyMap $nasgenmap$;
     private static final Factory FACTORY = new Factory(BYTES_PER_ELEMENT) {
         @Override
         public ArrayBufferView construct(final NativeArrayBuffer buffer, final int byteOffset, final int length) {
             return new NativeUint16Array(buffer, byteOffset, length);
         }
         @Override
         public ArrayData createArrayData(final NativeArrayBuffer buffer, final int byteOffset, final int length) {
             return new Uint16ArrayData(buffer, byteOffset, length);
         }
     };
     private static final class Uint16ArrayData extends ArrayDataImpl {
         private Uint16ArrayData(final NativeArrayBuffer buffer, final int byteOffset, final int elementLength) {
             super(buffer, byteOffset, elementLength);
         }
         @Override
         protected int byteIndex(final int index) {
             return index * BYTES_PER_ELEMENT + byteOffset;
         }
         @Override
         protected int getIntImpl(final int index) {
             final int byteIndex = byteIndex(index);
             final byte[] byteArray = buffer.getByteArray();
             return byteArray[byteIndex  ]       & 0x0000_00ff |
                    byteArray[byteIndex+1] <<  8 & 0x0000_ff00 ;
         }
         @Override
         protected void setImpl(final int index, final int value) {
             final int byteIndex = byteIndex(index);
             @SuppressWarnings("MismatchedReadAndWriteOfArray")
             final byte[] byteArray = buffer.getByteArray();
             byteArray[byteIndex  ] = (byte)(value       & 0xff);
             byteArray[byteIndex+1] = (byte)(value >>> 8 & 0xff);
         }
     }
     /**
      * Constructor
      *
      * @param newObj is this typed array instantiated with the new operator
      * @param self   self reference
      * @param args   args
      *
      * @return new typed array
      */
     @Constructor(arity = 1)
     public static Object constructor(final boolean newObj, final Object self, final Object... args) {
         return constructorImpl(args, FACTORY);
     }
     NativeUint16Array(final NativeArrayBuffer buffer, final int byteOffset, final int length) {
         super(buffer, byteOffset, length);
     }
     @Override
     protected Factory factory() {
         return FACTORY;
     }
     /**
      * Set values
      * @param self   self reference
      * @param array  multiple values of array's type to set
      * @param offset optional start index, interpreted  0 if undefined
      * @return undefined
      */
     @Function(attributes = Attribute.NOT_ENUMERABLE)
     protected static Object set(final Object self, final Object array, final Object offset) {
         return ArrayBufferView.setImpl(self, array, offset);
     }
     /**
      * Returns a new TypedArray view of the ArrayBuffer store for this TypedArray,
      * referencing the elements at begin, inclusive, up to end, exclusive. If either
      * begin or end is negative, it refers to an index from the end of the array,
      * as opposed to from the beginning.
      * <p>
      * If end is unspecified, the subarray contains all elements from begin to the end
      * of the TypedArray. The range specified by the begin and end values is clamped to
      * the valid index range for the current array. If the computed length of the new
      * TypedArray would be negative, it is clamped to zero.
      * <p>
      * The returned TypedArray will be of the same type as the array on which this
      * method is invoked.
      *
      * @param self self reference
      * @param begin begin position
      * @param end end position
      *
      * @return sub array
      */
     @Function(attributes = Attribute.NOT_ENUMERABLE)
     protected static Object subarray(final Object self, final Object begin, final Object end) {
         return ArrayBufferView.subarrayImpl(self, begin, end);
     }
     @Override
     protected ScriptObject getPrototype() {
         return Global.instance().getUint16ArrayPrototype();
     }
 }

Mercurial > jdk8-mips64-public > nashorn / annotate

src/jdk/nashorn/internal/objects/NativeUint16Array.java@b1980b5f00a1 (annotated)

src/jdk/nashorn/internal/objects/NativeUint16Array.java