| /* |
| * 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.runtime.arrays; |
| |
| import static jdk.nashorn.internal.codegen.CompilerConstants.specialCall; |
| import static jdk.nashorn.internal.lookup.Lookup.MH; |
| import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED; |
| |
| import java.lang.invoke.MethodHandle; |
| import java.lang.invoke.MethodHandles; |
| import java.util.Arrays; |
| import jdk.dynalink.linker.support.TypeUtilities; |
| import jdk.nashorn.internal.runtime.JSType; |
| |
| /** |
| * Implementation of {@link ArrayData} as soon as a double has been |
| * written to the array |
| */ |
| final class NumberArrayData extends ContinuousArrayData implements NumericElements { |
| /** |
| * The wrapped array |
| */ |
| private double[] array; |
| |
| /** |
| * Constructor |
| * @param array an int array |
| * @param length a length, not necessarily array.length |
| */ |
| NumberArrayData(final double[] array, final int length) { |
| super(length); |
| assert array.length >= length; |
| this.array = array; |
| } |
| |
| @Override |
| public final Class<?> getElementType() { |
| return double.class; |
| } |
| |
| @Override |
| public final Class<?> getBoxedElementType() { |
| return Double.class; |
| } |
| |
| @Override |
| public final int getElementWeight() { |
| return 3; |
| } |
| |
| @Override |
| public final ContinuousArrayData widest(final ContinuousArrayData otherData) { |
| return otherData instanceof IntOrLongElements ? this : otherData; |
| } |
| |
| @Override |
| public NumberArrayData copy() { |
| return new NumberArrayData(array.clone(), (int)length()); |
| } |
| |
| @Override |
| public Object[] asObjectArray() { |
| return toObjectArray(true); |
| } |
| |
| private Object[] toObjectArray(final boolean trim) { |
| assert length() <= array.length : "length exceeds internal array size"; |
| final int len = (int)length(); |
| final Object[] oarray = new Object[trim ? len : array.length]; |
| |
| for (int index = 0; index < len; index++) { |
| oarray[index] = array[index]; |
| } |
| return oarray; |
| } |
| |
| @Override |
| public Object asArrayOfType(final Class<?> componentType) { |
| if (componentType == double.class) { |
| final int len = (int)length(); |
| return array.length == len ? array.clone() : Arrays.copyOf(array, len); |
| } |
| return super.asArrayOfType(componentType); |
| } |
| |
| private static boolean canWiden(final Class<?> type) { |
| return TypeUtilities.isWrapperType(type) && |
| type != Boolean.class && type != Character.class; |
| } |
| |
| @Override |
| public ContinuousArrayData convert(final Class<?> type) { |
| if (! canWiden(type)) { |
| final int len = (int)length(); |
| return new ObjectArrayData(toObjectArray(false), len); |
| } |
| return this; |
| } |
| |
| @Override |
| public ArrayData shiftLeft(final int by) { |
| if (by >= length()) { |
| shrink(0); |
| } else { |
| System.arraycopy(array, by, array, 0, array.length - by); |
| } |
| setLength(Math.max(0, length() - by)); |
| return this; |
| } |
| |
| @Override |
| public ArrayData shiftRight(final int by) { |
| final ArrayData newData = ensure(by + length() - 1); |
| if (newData != this) { |
| newData.shiftRight(by); |
| return newData; |
| } |
| System.arraycopy(array, 0, array, by, array.length - by); |
| return this; |
| } |
| |
| @Override |
| public ArrayData ensure(final long safeIndex) { |
| if (safeIndex >= SparseArrayData.MAX_DENSE_LENGTH) { |
| return new SparseArrayData(this, safeIndex + 1); |
| } |
| final int alen = array.length; |
| if (safeIndex >= alen) { |
| final int newLength = ArrayData.nextSize((int)safeIndex); |
| array = Arrays.copyOf(array, newLength); //todo fill with nan or never accessed? |
| } |
| if (safeIndex >= length()) { |
| setLength(safeIndex + 1); |
| } |
| return this; |
| |
| } |
| |
| @Override |
| public ArrayData shrink(final long newLength) { |
| Arrays.fill(array, (int)newLength, array.length, 0.0); |
| return this; |
| } |
| |
| @Override |
| public ArrayData set(final int index, final Object value, final boolean strict) { |
| if (value instanceof Double || (value != null && canWiden(value.getClass()))) { |
| return set(index, ((Number)value).doubleValue(), strict); |
| } else if (value == UNDEFINED) { |
| return new UndefinedArrayFilter(this).set(index, value, strict); |
| } |
| |
| final ArrayData newData = convert(value == null ? Object.class : value.getClass()); |
| return newData.set(index, value, strict); |
| } |
| |
| @Override |
| public ArrayData set(final int index, final int value, final boolean strict) { |
| array[index] = value; |
| setLength(Math.max(index + 1, length())); |
| return this; |
| } |
| |
| @Override |
| public ArrayData set(final int index, final double value, final boolean strict) { |
| array[index] = value; |
| setLength(Math.max(index + 1, length())); |
| return this; |
| } |
| |
| private static final MethodHandle HAS_GET_ELEM = specialCall(MethodHandles.lookup(), NumberArrayData.class, "getElem", double.class, int.class).methodHandle(); |
| private static final MethodHandle SET_ELEM = specialCall(MethodHandles.lookup(), NumberArrayData.class, "setElem", void.class, int.class, double.class).methodHandle(); |
| |
| @SuppressWarnings("unused") |
| private double getElem(final int index) { |
| if (has(index)) { |
| return array[index]; |
| } |
| throw new ClassCastException(); |
| } |
| |
| @SuppressWarnings("unused") |
| private void setElem(final int index, final double elem) { |
| if (hasRoomFor(index)) { |
| array[index] = elem; |
| return; |
| } |
| throw new ClassCastException(); |
| } |
| |
| @Override |
| public MethodHandle getElementGetter(final Class<?> returnType, final int programPoint) { |
| if (returnType == int.class) { |
| return null; |
| } |
| return getContinuousElementGetter(HAS_GET_ELEM, returnType, programPoint); |
| } |
| |
| @Override |
| public MethodHandle getElementSetter(final Class<?> elementType) { |
| return elementType.isPrimitive() ? getContinuousElementSetter(MH.asType(SET_ELEM, SET_ELEM.type().changeParameterType(2, elementType)), elementType) : null; |
| } |
| |
| @Override |
| public int getInt(final int index) { |
| return JSType.toInt32(array[index]); |
| } |
| |
| @Override |
| public double getDouble(final int index) { |
| return array[index]; |
| } |
| |
| @Override |
| public double getDoubleOptimistic(final int index, final int programPoint) { |
| return array[index]; |
| } |
| |
| @Override |
| public Object getObject(final int index) { |
| return array[index]; |
| } |
| |
| @Override |
| public boolean has(final int index) { |
| return 0 <= index && index < length(); |
| } |
| |
| @Override |
| public ArrayData delete(final int index) { |
| return new DeletedRangeArrayFilter(this, index, index); |
| } |
| |
| @Override |
| public ArrayData delete(final long fromIndex, final long toIndex) { |
| return new DeletedRangeArrayFilter(this, fromIndex, toIndex); |
| } |
| |
| @Override |
| public Object pop() { |
| final int len = (int)length(); |
| if (len == 0) { |
| return UNDEFINED; |
| } |
| |
| final int newLength = len - 1; |
| final double elem = array[newLength]; |
| array[newLength] = 0; |
| setLength(newLength); |
| return elem; |
| } |
| |
| @Override |
| public ArrayData slice(final long from, final long to) { |
| final long start = from < 0 ? from + length() : from; |
| final long newLength = to - start; |
| return new NumberArrayData(Arrays.copyOfRange(array, (int)from, (int)to), (int)newLength); |
| } |
| |
| @Override |
| public ArrayData fastSplice(final int start, final int removed, final int added) throws UnsupportedOperationException { |
| final long oldLength = length(); |
| final long newLength = oldLength - removed + added; |
| if (newLength > SparseArrayData.MAX_DENSE_LENGTH && newLength > array.length) { |
| throw new UnsupportedOperationException(); |
| } |
| final ArrayData returnValue = removed == 0 ? |
| EMPTY_ARRAY : new NumberArrayData(Arrays.copyOfRange(array, start, start + removed), removed); |
| |
| if (newLength != oldLength) { |
| final double[] newArray; |
| |
| if (newLength > array.length) { |
| newArray = new double[ArrayData.nextSize((int)newLength)]; |
| System.arraycopy(array, 0, newArray, 0, start); |
| } else { |
| newArray = array; |
| } |
| |
| System.arraycopy(array, start + removed, newArray, start + added, (int)(oldLength - start - removed)); |
| array = newArray; |
| setLength(newLength); |
| } |
| |
| return returnValue; |
| } |
| |
| @Override |
| public double fastPush(final int arg) { |
| return fastPush((double)arg); |
| } |
| |
| @Override |
| public double fastPush(final long arg) { |
| return fastPush((double)arg); |
| } |
| |
| @Override |
| public double fastPush(final double arg) { |
| final int len = (int)length(); |
| if (len == array.length) { |
| //note that fastpush never creates spares arrays, there is nothing to gain by that - it will just use even more memory |
| array = Arrays.copyOf(array, nextSize(len)); |
| } |
| array[len] = arg; |
| return increaseLength(); |
| } |
| |
| @Override |
| public double fastPopDouble() { |
| if (length() == 0) { |
| throw new ClassCastException(); |
| } |
| final int newLength = (int)decreaseLength(); |
| final double elem = array[newLength]; |
| array[newLength] = 0; |
| return elem; |
| } |
| |
| @Override |
| public Object fastPopObject() { |
| return fastPopDouble(); |
| } |
| |
| @Override |
| public ContinuousArrayData fastConcat(final ContinuousArrayData otherData) { |
| final int otherLength = (int)otherData.length(); |
| final int thisLength = (int)length(); |
| assert otherLength > 0 && thisLength > 0; |
| |
| final double[] otherArray = ((NumberArrayData)otherData).array; |
| final int newLength = otherLength + thisLength; |
| final double[] newArray = new double[ArrayData.alignUp(newLength)]; |
| |
| System.arraycopy(array, 0, newArray, 0, thisLength); |
| System.arraycopy(otherArray, 0, newArray, thisLength, otherLength); |
| |
| return new NumberArrayData(newArray, newLength); |
| } |
| |
| @Override |
| public String toString() { |
| assert length() <= array.length : length() + " > " + array.length; |
| return getClass().getSimpleName() + ':' + Arrays.toString(Arrays.copyOf(array, (int)length())); |
| } |
| } |