| /* |
| * 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; |
| |
| /** |
| * ArrayBufferView, es6 class or TypedArray implementation |
| */ |
| @ScriptClass("ArrayBufferView") |
| public 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); |
| } |
| |
| /** |
| * Constructor |
| * |
| * @param buffer underlying NativeArrayBuffer |
| * @param byteOffset byte offset for buffer |
| * @param elementLength element length in bytes |
| */ |
| 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; |
| } |
| |
| /** |
| * Buffer getter as per spec |
| * @param self ArrayBufferView instance |
| * @return buffer |
| */ |
| @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE) |
| public static Object buffer(final Object self) { |
| return ((ArrayBufferView)self).buffer; |
| } |
| |
| /** |
| * Buffer offset getter as per spec |
| * @param self ArrayBufferView instance |
| * @return buffer offset |
| */ |
| @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE) |
| public static int byteOffset(final Object self) { |
| return ((ArrayBufferView)self).byteOffset; |
| } |
| |
| /** |
| * Byte length getter as per spec |
| * @param self ArrayBufferView instance |
| * @return array buffer view length in bytes |
| */ |
| @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(); |
| } |
| |
| /** |
| * Length getter as per spec |
| * @param self ArrayBufferView instance |
| * @return length in elements |
| */ |
| @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(); |
| } |
| |
| /** |
| * Factory class for byte ArrayBufferViews |
| */ |
| protected static abstract class Factory { |
| final int bytesPerElement; |
| final int maxElementLength; |
| |
| /** |
| * Constructor |
| * |
| * @param bytesPerElement number of bytes per element for this buffer |
| */ |
| public Factory(final int bytesPerElement) { |
| this.bytesPerElement = bytesPerElement; |
| this.maxElementLength = Integer.MAX_VALUE / bytesPerElement; |
| } |
| |
| /** |
| * Factory method |
| * |
| * @param elementLength number of elements |
| * @return new ArrayBufferView |
| */ |
| 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); |
| } |
| |
| /** |
| * Factory method |
| * |
| * @param buffer underlying buffer |
| * @param byteOffset byte offset |
| * @param elementLength number of elements |
| * |
| * @return new ArrayBufferView |
| */ |
| public abstract ArrayBufferView construct(final NativeArrayBuffer buffer, final int byteOffset, final int elementLength); |
| |
| /** |
| * Factory method for array data |
| * |
| * @param nb underlying native buffer |
| * @param start start element |
| * @param end end element |
| * |
| * @return new array data |
| */ |
| public abstract TypedArrayData<?> createArrayData(final ByteBuffer nb, final int start, final int end); |
| |
| /** |
| * Get the class name for this type of buffer |
| * |
| * @return class name |
| */ |
| public abstract String getClassName(); |
| } |
| |
| /** |
| * Get the factor for this kind of buffer |
| * @return Factory |
| */ |
| protected abstract Factory factory(); |
| |
| /** |
| * Get the prototype for this ArrayBufferView |
| * @param global global instance |
| * @return prototype |
| */ |
| protected abstract ScriptObject getPrototype(final Global global); |
| |
| @Override |
| public final String getClassName() { |
| return factory().getClassName(); |
| } |
| |
| /** |
| * Check if this array contains floats |
| * @return true if float array (or double) |
| */ |
| protected boolean isFloatArray() { |
| return false; |
| } |
| |
| /** |
| * Inheritable constructor implementation |
| * |
| * @param newObj is this a new constructor |
| * @param args arguments |
| * @param factory factory |
| * |
| * @return new ArrayBufferView |
| */ |
| 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; |
| } |
| |
| /** |
| * Inheritable implementation of set, if no efficient implementation is available |
| * |
| * @param self ArrayBufferView instance |
| * @param array array |
| * @param offset0 array offset |
| * |
| * @return result of setter |
| */ |
| 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); |
| } |
| |
| /** |
| * Implementation of subarray if no efficient override exists |
| * |
| * @param self ArrayBufferView instance |
| * @param begin0 begin index |
| * @param end0 end index |
| * |
| * @return sub array |
| */ |
| 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); |
| } |
| } |