jdk8-mips64-public/nashorn: src/jdk/nashorn/internal/objects/NativeInt8Array.java@61ffdd1b89f2 (annotated)

src/jdk/nashorn/internal/objects/NativeInt8Array.java@61ffdd1b89f2 (annotated)

src/jdk/nashorn/internal/objects/NativeInt8Array.java

Thu, 24 May 2018 16:39:31 +0800

author: aoqi
date: Thu, 24 May 2018 16:39:31 +0800
changeset 1959: 61ffdd1b89f2
parent 1720: c09b105e7be5
parent 1490: d85f981c8cf8
permissions: -rw-r--r--

Merge

 /*
  * 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 static jdk.nashorn.internal.codegen.CompilerConstants.specialCall;
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.nio.ByteBuffer;
 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.JSType;
 import jdk.nashorn.internal.runtime.PropertyMap;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.arrays.ArrayData;
 import jdk.nashorn.internal.runtime.arrays.TypedArrayData;
 /**
  * Int8Array for the TypedArray extension
  */
 @ScriptClass("Int8Array")
 public final class NativeInt8Array 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 = 1;
     // 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 NativeInt8Array(buffer, byteOffset, length);
         }
         @Override
         public Int8ArrayData createArrayData(final ByteBuffer nb, final int start, final int end) {
             return new Int8ArrayData(nb, start, end);
         }
         @Override
         public String getClassName() {
             return "Int8Array";
         }
     };
     private static final class Int8ArrayData extends TypedArrayData<ByteBuffer> {
         private static final MethodHandle GET_ELEM = specialCall(MethodHandles.lookup(), Int8ArrayData.class, "getElem", int.class, int.class).methodHandle();
         private static final MethodHandle SET_ELEM = specialCall(MethodHandles.lookup(), Int8ArrayData.class, "setElem", void.class, int.class, int.class).methodHandle();
         private Int8ArrayData(final ByteBuffer nb, final int start, final int end) {
             super(((ByteBuffer)nb.position(start).limit(end)).slice(), end - start);
         }
         @Override
         protected MethodHandle getGetElem() {
             return GET_ELEM;
         }
         @Override
         protected MethodHandle getSetElem() {
             return SET_ELEM;
         }
         @Override
         public Class<?> getElementType() {
             return int.class;
         }
         @Override
         public Class<?> getBoxedElementType() {
             return Integer.class;
         }
         private int getElem(final int index) {
             try {
                 return nb.get(index);
             } catch (final IndexOutOfBoundsException e) {
                 throw new ClassCastException(); //force relink - this works for unoptimistic too
             }
         }
         private void setElem(final int index, final int elem) {
             try {
                 if (index < nb.limit()) {
                     nb.put(index, (byte) elem);
                 }
             } catch (final IndexOutOfBoundsException e) {
                 throw new ClassCastException();
             }
         }
         @Override
         public int getInt(final int index) {
             return getElem(index);
         }
         @Override
         public int getIntOptimistic(final int index, final int programPoint) {
             return getElem(index);
         }
         @Override
         public double getDouble(final int index) {
             return getInt(index);
         }
         @Override
         public double getDoubleOptimistic(final int index, final int programPoint) {
             return getElem(index);
         }
         @Override
         public Object getObject(final int index) {
             return getInt(index);
         }
         @Override
         public ArrayData set(final int index, final Object value, final boolean strict) {
             return set(index, JSType.toInt32(value), strict);
         }
         @Override
         public ArrayData set(final int index, final int value, final boolean strict) {
             setElem(index, value);
             return this;
         }
         @Override
         public ArrayData set(final int index, final double value, final boolean strict) {
             return set(index, (int)value, strict);
         }
     }
     /**
      * 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 NativeInt8Array constructor(final boolean newObj, final Object self, final Object... args) {
         return (NativeInt8Array)constructorImpl(newObj, args, FACTORY);
     }
     NativeInt8Array(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 NativeInt8Array subarray(final Object self, final Object begin, final Object end) {
         return (NativeInt8Array)ArrayBufferView.subarrayImpl(self, begin, end);
     }
     @Override
     protected ScriptObject getPrototype(final Global global) {
         return global.getInt8ArrayPrototype();
     }
 }

Mercurial > jdk8-mips64-public > nashorn / annotate

src/jdk/nashorn/internal/objects/NativeInt8Array.java@61ffdd1b89f2 (annotated)

src/jdk/nashorn/internal/objects/NativeInt8Array.java