jdk8-mips64-public/nashorn: src/jdk/nashorn/internal/objects/ArrayBufferView.java@d79265f2fa92 (annotated)

src/jdk/nashorn/internal/objects/ArrayBufferView.java@d79265f2fa92 (annotated)

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

Thu, 25 Sep 2014 15:53:47 +0200

author: lagergren
date: Thu, 25 Sep 2014 15:53:47 +0200
changeset 1028: d79265f2fa92
parent 1020: 9ee8fd4a7266
child 1056: db675278b4d3
permissions: -rw-r--r--

8025435: Optimistic builtins support, implemented initial optimistic versions of push, pop, and charCodeAt
Reviewed-by: hannesw, attila, sundar

 /*
  * 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.runtime.ECMAErrors.rangeError;
 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
 import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.INVALID_PROGRAM_POINT;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 import jdk.internal.dynalink.CallSiteDescriptor;
 import jdk.internal.dynalink.linker.GuardedInvocation;
 import jdk.internal.dynalink.linker.LinkRequest;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Getter;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
 import jdk.nashorn.internal.runtime.JSType;
 import jdk.nashorn.internal.runtime.PropertyMap;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.ScriptRuntime;
 import jdk.nashorn.internal.runtime.arrays.ArrayData;
 import jdk.nashorn.internal.runtime.arrays.TypedArrayData;
 @ScriptClass("ArrayBufferView")
 abstract class ArrayBufferView extends ScriptObject {
     private final NativeArrayBuffer buffer;
     private final int byteOffset;
     // initialized by nasgen
     private static PropertyMap $nasgenmap$;
     private ArrayBufferView(final NativeArrayBuffer buffer, final int byteOffset, final int elementLength, final Global global) {
         super($nasgenmap$);
         final int bytesPerElement = bytesPerElement();
         checkConstructorArgs(buffer.getByteLength(), bytesPerElement, byteOffset, elementLength);
         setProto(getPrototype(global));
         this.buffer     = buffer;
         this.byteOffset = byteOffset;
         assert byteOffset % bytesPerElement == 0;
         final int start = byteOffset / bytesPerElement;
         final ByteBuffer newNioBuffer = buffer.getNioBuffer().duplicate().order(ByteOrder.nativeOrder());
         final ArrayData  data         = factory().createArrayData(newNioBuffer, start, start + elementLength);
         setArray(data);
     }
     protected ArrayBufferView(final NativeArrayBuffer buffer, final int byteOffset, final int elementLength) {
         this(buffer, byteOffset, elementLength, Global.instance());
     }
     private static void checkConstructorArgs(final int byteLength, final int bytesPerElement, final int byteOffset, final int elementLength) {
         if (byteOffset < 0 || elementLength < 0) {
             throw new RuntimeException("byteOffset or length must not be negative, byteOffset=" + byteOffset + ", elementLength=" + elementLength + ", bytesPerElement=" + bytesPerElement);
         } else if (byteOffset + elementLength * bytesPerElement > byteLength) {
             throw new RuntimeException("byteOffset + byteLength out of range, byteOffset=" + byteOffset + ", elementLength=" + elementLength + ", bytesPerElement=" + bytesPerElement);
         } else if (byteOffset % bytesPerElement != 0) {
             throw new RuntimeException("byteOffset must be a multiple of the element size, byteOffset=" + byteOffset + " bytesPerElement=" + bytesPerElement);
         }
     }
     private int bytesPerElement() {
         return factory().bytesPerElement;
     }
     @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE)
     public static Object buffer(final Object self) {
         return ((ArrayBufferView)self).buffer;
     }
     @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE)
     public static int byteOffset(final Object self) {
         return ((ArrayBufferView)self).byteOffset;
     }
     @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE)
     public static int byteLength(final Object self) {
         final ArrayBufferView view = (ArrayBufferView)self;
         return ((TypedArrayData<?>)view.getArray()).getElementLength() * view.bytesPerElement();
     }
     @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE)
     public static int length(final Object self) {
         return ((ArrayBufferView)self).elementLength();
     }
     @Override
     public final Object getLength() {
         return elementLength();
     }
     private int elementLength() {
         return ((TypedArrayData<?>)getArray()).getElementLength();
     }
     protected static abstract class Factory {
         final int bytesPerElement;
         final int maxElementLength;
         public Factory(final int bytesPerElement) {
             this.bytesPerElement  = bytesPerElement;
             this.maxElementLength = Integer.MAX_VALUE / bytesPerElement;
         }
         public final ArrayBufferView construct(final int elementLength) {
             if (elementLength > maxElementLength) {
                 throw rangeError("inappropriate.array.buffer.length", JSType.toString(elementLength));
             }
             return construct(new NativeArrayBuffer(elementLength * bytesPerElement), 0, elementLength);
         }
         public abstract ArrayBufferView construct(NativeArrayBuffer buffer, int byteOffset, int elementLength);
         public abstract TypedArrayData<?> createArrayData(ByteBuffer nb, int start, int end);
         public abstract String getClassName();
     }
     protected abstract Factory factory();
     protected abstract ScriptObject getPrototype(final Global global);
     @Override
     public final String getClassName() {
         return factory().getClassName();
     }
     protected boolean isFloatArray() {
         return false;
     }
     protected static ArrayBufferView constructorImpl(final boolean newObj, final Object[] args, final Factory factory) {
         final Object          arg0 = args.length != 0 ? args[0] : 0;
         final ArrayBufferView dest;
         final int             length;
         if (!newObj) {
             throw typeError("constructor.requires.new", factory.getClassName());
         }
         if (arg0 instanceof NativeArrayBuffer) {
             // Constructor(ArrayBuffer buffer, optional unsigned long byteOffset, optional unsigned long length)
             final NativeArrayBuffer buffer     = (NativeArrayBuffer)arg0;
             final int               byteOffset = args.length > 1 ? JSType.toInt32(args[1]) : 0;
             if (args.length > 2) {
                 length = JSType.toInt32(args[2]);
             } else {
                 if ((buffer.getByteLength() - byteOffset) % factory.bytesPerElement != 0) {
                     throw new RuntimeException("buffer.byteLength - byteOffset must be a multiple of the element size");
                 }
                 length = (buffer.getByteLength() - byteOffset) / factory.bytesPerElement;
             }
             return factory.construct(buffer, byteOffset, length);
         } else if (arg0 instanceof ArrayBufferView) {
             // Constructor(TypedArray array)
             length = ((ArrayBufferView)arg0).elementLength();
             dest   = factory.construct(length);
         } else if (arg0 instanceof NativeArray) {
             // Constructor(type[] array)
             length = lengthToInt(((NativeArray) arg0).getArray().length());
             dest   = factory.construct(length);
         } else {
             // Constructor(unsigned long length). Treating infinity as 0 is a special case for ArrayBufferView.
             final double dlen = JSType.toNumber(arg0);
             length = lengthToInt(Double.isInfinite(dlen) ? 0L : JSType.toLong(dlen));
             return factory.construct(length);
         }
         copyElements(dest, length, (ScriptObject)arg0, 0);
         return dest;
     }
     protected static Object setImpl(final Object self, final Object array, final Object offset0) {
         final ArrayBufferView dest = (ArrayBufferView)self;
         final int length;
         if (array instanceof ArrayBufferView) {
             // void set(TypedArray array, optional unsigned long offset)
             length = ((ArrayBufferView)array).elementLength();
         } else if (array instanceof NativeArray) {
             // void set(type[] array, optional unsigned long offset)
             length = (int) (((NativeArray) array).getArray().length() & 0x7fff_ffff);
         } else {
             throw new RuntimeException("argument is not of array type");
         }
         final ScriptObject source = (ScriptObject)array;
         final int offset = JSType.toInt32(offset0); // default=0
         if (dest.elementLength() < length + offset || offset < 0) {
             throw new RuntimeException("offset or array length out of bounds");
         }
         copyElements(dest, length, source, offset);
         return ScriptRuntime.UNDEFINED;
     }
     private static void copyElements(final ArrayBufferView dest, final int length, final ScriptObject source, final int offset) {
         if (!dest.isFloatArray()) {
             for (int i = 0, j = offset; i < length; i++, j++) {
                 dest.set(j, source.getInt(i, INVALID_PROGRAM_POINT), 0);
             }
         } else {
             for (int i = 0, j = offset; i < length; i++, j++) {
                 dest.set(j, source.getDouble(i, INVALID_PROGRAM_POINT), 0);
             }
         }
     }
     private static int lengthToInt(final long length) {
         if (length > Integer.MAX_VALUE || length < 0) {
             throw rangeError("inappropriate.array.buffer.length", JSType.toString(length));
         }
         return (int)(length & Integer.MAX_VALUE);
     }
     protected static ScriptObject subarrayImpl(final Object self, final Object begin0, final Object end0) {
         final ArrayBufferView arrayView       = (ArrayBufferView)self;
         final int             byteOffset      = arrayView.byteOffset;
         final int             bytesPerElement = arrayView.bytesPerElement();
         final int             elementLength   = arrayView.elementLength();
         final int             begin           = NativeArrayBuffer.adjustIndex(JSType.toInt32(begin0), elementLength);
         final int             end             = NativeArrayBuffer.adjustIndex(end0 != ScriptRuntime.UNDEFINED ? JSType.toInt32(end0) : elementLength, elementLength);
         final int             length          = Math.max(end - begin, 0);
         assert byteOffset % bytesPerElement == 0;
         //second is byteoffset
         return arrayView.factory().construct(arrayView.buffer, begin * bytesPerElement + byteOffset, length);
     }
     @Override
     protected GuardedInvocation findGetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) {
         final GuardedInvocation inv = getArray().findFastGetIndexMethod(getArray().getClass(), desc, request);
         if (inv != null) {
             return inv;
         }
         return super.findGetIndexMethod(desc, request);
     }
     @Override
     protected GuardedInvocation findSetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) {
         final GuardedInvocation inv = getArray().findFastSetIndexMethod(getArray().getClass(), desc, request);
         if (inv != null) {
             return inv;
         }
         return super.findSetIndexMethod(desc, request);
     }
 }

Mercurial > jdk8-mips64-public > nashorn / annotate

src/jdk/nashorn/internal/objects/ArrayBufferView.java@d79265f2fa92 (annotated)

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