jdk8-mips64-public/nashorn: src/jdk/nashorn/internal/objects/ArrayBufferView.java@5ab19753ce4a

8037400: Remove getInitialMap getters and GlobalObject interface
Reviewed-by: lagergren, jlaskey, attila

     1 /*

     2  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 package jdk.nashorn.internal.objects;

    28 import static jdk.nashorn.internal.runtime.ECMAErrors.rangeError;

    30 import jdk.nashorn.internal.objects.annotations.Attribute;

    31 import jdk.nashorn.internal.objects.annotations.Getter;

    32 import jdk.nashorn.internal.objects.annotations.ScriptClass;

    33 import jdk.nashorn.internal.runtime.JSType;

    34 import jdk.nashorn.internal.runtime.PropertyMap;

    35 import jdk.nashorn.internal.runtime.ScriptObject;

    36 import jdk.nashorn.internal.runtime.ScriptRuntime;

    37 import jdk.nashorn.internal.runtime.arrays.ArrayData;

    39 @ScriptClass("ArrayBufferView")

    40 abstract class ArrayBufferView extends ScriptObject {

    42     // initialized by nasgen

    43     private static PropertyMap $nasgenmap$;

    45     private ArrayBufferView(final NativeArrayBuffer buffer, final int byteOffset, final int elementLength, final Global global) {

    46         super($nasgenmap$);

    47         checkConstructorArgs(buffer, byteOffset, elementLength);

    48         this.setProto(getPrototype(global));

    49         this.setArray(factory().createArrayData(buffer, byteOffset, elementLength));

    50     }

    52     ArrayBufferView(final NativeArrayBuffer buffer, final int byteOffset, final int elementLength) {

    53         this(buffer, byteOffset, elementLength, Global.instance());

    54     }

    56     private void checkConstructorArgs(final NativeArrayBuffer buffer, final int byteOffset, final int elementLength) {

    57         if (byteOffset < 0 || elementLength < 0) {

    58             throw new RuntimeException("byteOffset or length must not be negative");

    59         }

    60         if (byteOffset + elementLength * bytesPerElement() > buffer.getByteLength()) {

    61             throw new RuntimeException("byteOffset + byteLength out of range");

    62         }

    63         if (byteOffset % bytesPerElement() != 0) {

    64             throw new RuntimeException("byteOffset must be a multiple of the element size");

    65         }

    66     }

    68     private int bytesPerElement() {

    69         return factory().bytesPerElement;

    70     }

    72     @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE)

    73     public static Object buffer(final Object self) {

    74         return ((ArrayDataImpl)((ArrayBufferView)self).getArray()).buffer;

    75     }

    77     @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE)

    78     public static Object byteOffset(final Object self) {

    79         return ((ArrayDataImpl)((ArrayBufferView)self).getArray()).byteOffset;

    80     }

    82     @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE)

    83     public static Object byteLength(final Object self) {

    84         final ArrayBufferView view = (ArrayBufferView)self;

    85         return ((ArrayDataImpl)view.getArray()).elementLength * view.bytesPerElement();

    86     }

    88     @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE)

    89     public static Object length(final Object self) {

    90         return ((ArrayBufferView)self).elementLength();

    91     }

    93     @Override

    94     public final Object getLength() {

    95         return elementLength();

    96     }

    98     private int elementLength() {

    99         return ((ArrayDataImpl)getArray()).elementLength;

   100     }

   102     protected static abstract class ArrayDataImpl extends ArrayData {

   103         protected final NativeArrayBuffer buffer;

   104         protected final int byteOffset;

   105         private final int elementLength;

   107         protected ArrayDataImpl(final NativeArrayBuffer buffer, final int byteOffset, final int elementLength) {

   108             super(elementLength);

   109             this.buffer = buffer;

   110             this.byteOffset = byteOffset;

   111             this.elementLength = elementLength;

   112         }

   114         @Override

   115         public ArrayData copy() {

   116             throw new UnsupportedOperationException();   // Not used for ArrayBuffers

   117         }

   119         @Override

   120         public Object[] asObjectArray() {

   121             final Object[] array = new Object[elementLength];

   122             for (int i = 0; i < elementLength; i++) {

   123                 array[i] = getObjectImpl(i);

   124             }

   125             return array;

   126         }

   128         @Override

   129         public ArrayData ensure(final long safeIndex) {

   130             return this;

   131         }

   133         @Override

   134         public void setLength(final long length) {

   135             //empty?

   136             //TODO is this right?

   137         }

   139         @Override

   140         public ArrayData shrink(final long newLength) {

   141             return this;

   142         }

   144         @Override

   145         public ArrayData set(final int index, final Object value, final boolean strict) {

   146             if (has(index)) {

   147                 setImpl(index, value);

   148             }

   149             return this;

   150         }

   152         @Override

   153         public ArrayData set(final int index, final int value, final boolean strict) {

   154             if (has(index)) {

   155                 setImpl(index, value);

   156             }

   157             return this;

   158         }

   160         @Override

   161         public ArrayData set(final int index, final long value, final boolean strict) {

   162             if (has(index)) {

   163                 setImpl(index, value);

   164             }

   165             return this;

   166         }

   168         @Override

   169         public ArrayData set(final int index, final double value, final boolean strict) {

   170             if (has(index)) {

   171                 setImpl(index, value);

   172             }

   173             return this;

   174         }

   176         @Override

   177         public int getInt(final int index) {

   178             return getIntImpl(index);

   179         }

   181         @Override

   182         public long getLong(final int index) {

   183             return getLongImpl(index);

   184         }

   186         @Override

   187         public double getDouble(final int index) {

   188             return getDoubleImpl(index);

   189         }

   191         @Override

   192         public Object getObject(final int index) {

   193             return getObjectImpl(index);

   194         }

   196         @Override

   197         public boolean has(final int index) {

   198             return index >= 0 && index < elementLength;

   199         }

   201         @Override

   202         public boolean canDelete(final int index, final boolean strict) {

   203             return false;

   204         }

   206         @Override

   207         public boolean canDelete(final long fromIndex, final long toIndex, final boolean strict) {

   208             return false;

   209         }

   211         @Override

   212         public ArrayData delete(final int index) {

   213             return this;

   214         }

   216         @Override

   217         public ArrayData delete(final long fromIndex, final long toIndex) {

   218             return this;

   219         }

   221         @Override

   222         protected ArrayData convert(final Class<?> type) {

   223             return this;

   224         }

   226         @Override

   227         public void shiftLeft(final int by) {

   228             throw new UnsupportedOperationException();

   229         }

   231         @Override

   232         public ArrayData shiftRight(final int by) {

   233             throw new UnsupportedOperationException();

   234         }

   236         @Override

   237         public Object pop() {

   238             throw new UnsupportedOperationException();

   239         }

   241         @Override

   242         public ArrayData slice(final long from, final long to) {

   243             throw new UnsupportedOperationException();

   244         }

   246         protected abstract int getIntImpl(int key);

   248         protected long getLongImpl(final int key) {

   249             return getIntImpl(key);

   250         }

   252         protected double getDoubleImpl(final int key) {

   253             return getIntImpl(key);

   254         }

   256         protected Object getObjectImpl(final int key) {

   257             return getIntImpl(key);

   258         }

   260         protected abstract void setImpl(int key, int value);

   262         protected void setImpl(final int key, final long value) {

   263             setImpl(key, (int)value);

   264         }

   266         protected void setImpl(final int key, final double value) {

   267             setImpl(key, JSType.toInt32(value));

   268         }

   270         protected void setImpl(final int key, final Object value) {

   271             setImpl(key, JSType.toInt32(value));

   272         }

   274         protected abstract int byteIndex(int index);

   275     }

   277     protected static abstract class Factory {

   278         final int bytesPerElement;

   279         final int maxElementLength;

   281         public Factory(final int bytesPerElement) {

   282             this.bytesPerElement = bytesPerElement;

   283             this.maxElementLength = Integer.MAX_VALUE / bytesPerElement;

   284         }

   286         public final ArrayBufferView construct(final int elementLength) {

   287             if(elementLength > maxElementLength) {

   288                 throw rangeError("inappropriate.array.buffer.length", JSType.toString(elementLength));

   289             }

   290             return construct(new NativeArrayBuffer(elementLength * bytesPerElement), 0, elementLength);

   291         }

   293         public abstract ArrayBufferView construct(NativeArrayBuffer buffer, int byteOffset, int elementLength);

   295         public abstract ArrayData createArrayData(NativeArrayBuffer buffer, int byteOffset, int elementLength);

   296     }

   298     protected abstract Factory factory();

   300     protected abstract ScriptObject getPrototype(final Global global);

   302     protected boolean isFloatArray() {

   303         return false;

   304     }

   306     protected static ArrayBufferView constructorImpl(final Object[] args, final Factory factory) {

   307         final Object arg0 = args.length != 0 ? args[0] : 0;

   308         final ArrayBufferView dst;

   309         final int length;

   310         if (arg0 instanceof NativeArrayBuffer) {

   311             // Constructor(ArrayBuffer buffer, optional unsigned long byteOffset, optional unsigned long length)

   312             final NativeArrayBuffer buffer = (NativeArrayBuffer) arg0;

   313             final int byteOffset = args.length > 1 ? JSType.toInt32(args[1]) : 0;

   314             if (args.length > 2) {

   315                 length = JSType.toInt32(args[2]);

   316             } else {

   317                 if ((buffer.getByteLength() - byteOffset) % factory.bytesPerElement != 0) {

   318                     throw new RuntimeException("buffer.byteLength - byteOffset must be a multiple of the element size");

   319                 }

   320                 length = (buffer.getByteLength() - byteOffset) / factory.bytesPerElement;

   321             }

   322             return factory.construct(buffer, byteOffset, length);

   323         } else if (arg0 instanceof ArrayBufferView) {

   324             // Constructor(TypedArray array)

   325             length = ((ArrayBufferView)arg0).elementLength();

   326             dst = factory.construct(length);

   327         } else if (arg0 instanceof NativeArray) {

   328             // Constructor(type[] array)

   329             length = lengthToInt(((NativeArray) arg0).getArray().length());

   330             dst = factory.construct(length);

   331         } else {

   332             // Constructor(unsigned long length)

   333             length = lengthToInt(JSType.toInt64(arg0));

   334             return factory.construct(length);

   335         }

   337         copyElements(dst, length, (ScriptObject)arg0, 0);

   338         return dst;

   339     }

   341     protected static Object setImpl(final Object self, final Object array, final Object offset0) {

   342         final ArrayBufferView dest = ((ArrayBufferView)self);

   343         final int length;

   344         if (array instanceof ArrayBufferView) {

   345             // void set(TypedArray array, optional unsigned long offset)

   346             length = ((ArrayBufferView)array).elementLength();

   347         } else if (array instanceof NativeArray) {

   348             // void set(type[] array, optional unsigned long offset)

   349             length = (int) (((NativeArray) array).getArray().length() & 0x7fff_ffff);

   350         } else {

   351             throw new RuntimeException("argument is not of array type");

   352         }

   354         final ScriptObject source = (ScriptObject) array;

   355         final int offset = JSType.toInt32(offset0); // default=0

   357         if (dest.elementLength() < length + offset || offset < 0) {

   358             throw new RuntimeException("offset or array length out of bounds");

   359         }

   361         copyElements(dest, length, source, offset);

   363         return ScriptRuntime.UNDEFINED;

   364     }

   366     private static void copyElements(final ArrayBufferView dest, final int length, final ScriptObject source, final int offset) {

   367         if (!dest.isFloatArray()) {

   368             for (int i = 0, j = offset; i < length; i++, j++) {

   369                 dest.set(j, source.getInt(i), false);

   370             }

   371         } else {

   372             for (int i = 0, j = offset; i < length; i++, j++) {

   373                 dest.set(j, source.getDouble(i), false);

   374             }

   375         }

   376     }

   378     private static int lengthToInt(final long length) {

   379         if (length > Integer.MAX_VALUE || length < 0) {

   380             throw rangeError("inappropriate.array.buffer.length", JSType.toString(length));

   381         }

   382         return (int) (length & Integer.MAX_VALUE);

   383     }

   385     protected static Object subarrayImpl(final Object self, final Object begin0, final Object end0) {

   386         final ArrayBufferView arrayView = ((ArrayBufferView)self);

   387         final int elementLength = arrayView.elementLength();

   388         final int begin = NativeArrayBuffer.adjustIndex(JSType.toInt32(begin0), elementLength);

   389         final int end = NativeArrayBuffer.adjustIndex(end0 != ScriptRuntime.UNDEFINED ? JSType.toInt32(end0) : elementLength, elementLength);

   390         final ArrayDataImpl arrayData = (ArrayDataImpl)arrayView.getArray();

   391         return arrayView.factory().construct(arrayData.buffer, arrayData.byteIndex(begin), Math.max(end - begin, 0));

   392     }

   393 }

Mercurial > jdk8-mips64-public > nashorn / file revision

src/jdk/nashorn/internal/objects/ArrayBufferView.java@5ab19753ce4a

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