src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/arrays/IntArrayData.java - toolchain/jdk/jdk9_nashorn - Git at Google

 /*
  * 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 java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.util.Arrays;
 import jdk.nashorn.internal.codegen.types.Type;
 import jdk.nashorn.internal.runtime.JSType;
 import jdk.nashorn.internal.runtime.ScriptRuntime;

 /**
  * Implementation of {@link ArrayData} as soon as an int has been
  * written to the array. This is the default data for new arrays
  */
 final class IntArrayData extends ContinuousArrayData {
     /**
      * The wrapped array
      */
     private int[] array;

     IntArrayData() {
         this(new int[ArrayData.CHUNK_SIZE], 0);
     }

     IntArrayData(final int length) {
         super(length);
         this.array  = new int[ArrayData.nextSize(length)];
     }

     /**
      * Constructor
      * @param array an int array
      * @param length a length, not necessarily array.length
      */
     IntArrayData(final int array[], final int length) {
         super(length);
         assert array.length >= length;
         this.array = array;
     }

     private static final MethodHandle HAS_GET_ELEM = specialCall(MethodHandles.lookup(), IntArrayData.class, "getElem", int.class, int.class).methodHandle();
     private static final MethodHandle SET_ELEM     = specialCall(MethodHandles.lookup(), IntArrayData.class, "setElem", void.class, int.class, int.class).methodHandle();

     @SuppressWarnings("unused")
     private int getElem(final int index) {
         if (has(index)) {
             return array[index];
         }
         throw new ClassCastException();
     }

     @SuppressWarnings("unused")
     private void setElem(final int index, final int elem) {
         if (hasRoomFor(index)) {
             array[index] = elem;
             return;
         }
         throw new ClassCastException();
     }

     @Override
     public MethodHandle getElementGetter(final Class<?> returnType, final int programPoint) {
         return getContinuousElementGetter(HAS_GET_ELEM, returnType, programPoint);
     }

     @Override
     public MethodHandle getElementSetter(final Class<?> elementType) {
         return elementType == int.class ? getContinuousElementSetter(SET_ELEM, elementType) : null;
     }

     @Override
     public ArrayData copy() {
         return new IntArrayData(array.clone(), (int) length());
     }

     @Override
     public Object[] asObjectArray() {
         return toObjectArray(array, (int) length());
     }

     @Override
     public Object asArrayOfType(final Class<?> componentType) {
         if (componentType == int.class) {
             return array.length == length() ? array.clone() : Arrays.copyOf(array, (int) length());
         }
         return super.asArrayOfType(componentType);
     }

     private static Object[] toObjectArray(final int[] array, final int length) {
         assert length <= array.length : "length exceeds internal array size";
         final Object[] oarray = new Object[array.length];

         for (int index = 0; index < length; index++) {
             oarray[index] = Integer.valueOf(array[index]);
         }

         return oarray;
     }

     private static double[] toDoubleArray(final int[] array, final int length) {
         assert length <= array.length : "length exceeds internal array size";
         final double[] darray = new double[array.length];

         for (int index = 0; index < length; index++) {
             darray[index] = array[index];
         }

         return darray;
     }

     private static long[] toLongArray(final int[] array, final int length) {
         assert length <= array.length : "length exceeds internal array size";
         final long[] larray = new long[array.length];

         for (int index = 0; index < length; index++) {
             larray[index] = array[index];
         }

         return larray;
     }

     @Override
     public ArrayData convert(final Class<?> type) {
         if (type == Integer.class) {
             return this;
         }
         final int length = (int) length();
         if (type == Long.class) {
             return new LongArrayData(IntArrayData.toLongArray(array, length), length);
         } else if (type == Double.class) {
             return new NumberArrayData(IntArrayData.toDoubleArray(array, length), length);
         } else {
             return new ObjectArrayData(IntArrayData.toObjectArray(array, length), length);
         }
     }

     @Override
     public void shiftLeft(final int by) {
         System.arraycopy(array, by, array, 0, array.length - by);
     }

     @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);
         }
         setLength(safeIndex + 1);
         return this;
     }

     @Override
     public ArrayData shrink(final long newLength) {
         Arrays.fill(array, (int) newLength, array.length, 0);

         return this;
     }

     @Override
     public ArrayData set(final int index, final Object value, final boolean strict) {
         if (JSType.isRepresentableAsInt(value)) {
             return set(index, JSType.toInt32(value), strict);
         } else if (value == ScriptRuntime.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 long value, final boolean strict) {
         if (JSType.isRepresentableAsInt(value)) {
             array[index] = JSType.toInt32(value);
             setLength(Math.max(index + 1, length()));
             return this;
         }

         return convert(Long.class).set(index, value, strict);
     }

     @Override
     public ArrayData set(final int index, final double value, final boolean strict) {
         if (JSType.isRepresentableAsInt(value)) {
             array[index] = (int)(long)value;
             setLength(Math.max(index + 1, length()));
             return this;
         }

         return convert(Double.class).set(index, value, strict);
     }

     @Override
     public Type getOptimisticType() {
         return Type.INT;
     }

     @Override
     public int getInt(final int index) {
         return array[index];
     }

     @Override
     public int getIntOptimistic(final int index, final int programPoint) {
         return array[index];
     }

     @Override
     public long getLong(final int index) {
         return array[index];
     }

     @Override
     public long getLongOptimistic(final int index, final int programPoint) {
         return 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() {
         if (length() == 0) {
             return ScriptRuntime.UNDEFINED;
         }

         final int newLength = (int) length() - 1;
         final int 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 IntArrayData(Arrays.copyOfRange(array, (int)from, (int)to), (int)newLength);
     }

     @Override
     public final ArrayData push(final boolean strict, final int item) {
         final long      length = length();
         final ArrayData newData = ensure(length);
         if (newData == this) {
             array[(int)length] = item;
             return this;
         }
         return newData.set((int)length, item, strict);
     }

     @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 IntArrayData(Arrays.copyOfRange(array, start, start + removed), removed);

         if (newLength != oldLength) {
             final int[] newArray;

             if (newLength > array.length) {
                 newArray = new int[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;
     }
 }
	/*
	* 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 java.lang.invoke.MethodHandle;
	import java.lang.invoke.MethodHandles;
	import java.util.Arrays;
	import jdk.nashorn.internal.codegen.types.Type;
	import jdk.nashorn.internal.runtime.JSType;
	import jdk.nashorn.internal.runtime.ScriptRuntime;

	/**
	* Implementation of {@link ArrayData} as soon as an int has been
	* written to the array. This is the default data for new arrays
	*/
	final class IntArrayData extends ContinuousArrayData {
	/**
	* The wrapped array
	*/
	private int[] array;

	IntArrayData() {
	this(new int[ArrayData.CHUNK_SIZE], 0);
	}

	IntArrayData(final int length) {
	super(length);
	this.array = new int[ArrayData.nextSize(length)];
	}

	/**
	* Constructor
	* @param array an int array
	* @param length a length, not necessarily array.length
	*/
	IntArrayData(final int array[], final int length) {
	super(length);
	assert array.length >= length;
	this.array = array;
	}

	private static final MethodHandle HAS_GET_ELEM = specialCall(MethodHandles.lookup(), IntArrayData.class, "getElem", int.class, int.class).methodHandle();
	private static final MethodHandle SET_ELEM = specialCall(MethodHandles.lookup(), IntArrayData.class, "setElem", void.class, int.class, int.class).methodHandle();

	@SuppressWarnings("unused")
	private int getElem(final int index) {
	if (has(index)) {
	return array[index];
	}
	throw new ClassCastException();
	}

	@SuppressWarnings("unused")
	private void setElem(final int index, final int elem) {
	if (hasRoomFor(index)) {
	array[index] = elem;
	return;
	}
	throw new ClassCastException();
	}

	@Override
	public MethodHandle getElementGetter(final Class<?> returnType, final int programPoint) {
	return getContinuousElementGetter(HAS_GET_ELEM, returnType, programPoint);
	}

	@Override
	public MethodHandle getElementSetter(final Class<?> elementType) {
	return elementType == int.class ? getContinuousElementSetter(SET_ELEM, elementType) : null;
	}

	@Override
	public ArrayData copy() {
	return new IntArrayData(array.clone(), (int) length());
	}

	@Override
	public Object[] asObjectArray() {
	return toObjectArray(array, (int) length());
	}

	@Override
	public Object asArrayOfType(final Class<?> componentType) {
	if (componentType == int.class) {
	return array.length == length() ? array.clone() : Arrays.copyOf(array, (int) length());
	}
	return super.asArrayOfType(componentType);
	}

	private static Object[] toObjectArray(final int[] array, final int length) {
	assert length <= array.length : "length exceeds internal array size";
	final Object[] oarray = new Object[array.length];

	for (int index = 0; index < length; index++) {
	oarray[index] = Integer.valueOf(array[index]);
	}

	return oarray;
	}

	private static double[] toDoubleArray(final int[] array, final int length) {
	assert length <= array.length : "length exceeds internal array size";
	final double[] darray = new double[array.length];

	for (int index = 0; index < length; index++) {
	darray[index] = array[index];
	}

	return darray;
	}

	private static long[] toLongArray(final int[] array, final int length) {
	assert length <= array.length : "length exceeds internal array size";
	final long[] larray = new long[array.length];

	for (int index = 0; index < length; index++) {
	larray[index] = array[index];
	}

	return larray;
	}

	@Override
	public ArrayData convert(final Class<?> type) {
	if (type == Integer.class) {
	return this;
	}
	final int length = (int) length();
	if (type == Long.class) {
	return new LongArrayData(IntArrayData.toLongArray(array, length), length);
	} else if (type == Double.class) {
	return new NumberArrayData(IntArrayData.toDoubleArray(array, length), length);
	} else {
	return new ObjectArrayData(IntArrayData.toObjectArray(array, length), length);
	}
	}

	@Override
	public void shiftLeft(final int by) {
	System.arraycopy(array, by, array, 0, array.length - by);
	}

	@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);
	}
	setLength(safeIndex + 1);
	return this;
	}

	@Override
	public ArrayData shrink(final long newLength) {
	Arrays.fill(array, (int) newLength, array.length, 0);

	return this;
	}

	@Override
	public ArrayData set(final int index, final Object value, final boolean strict) {
	if (JSType.isRepresentableAsInt(value)) {
	return set(index, JSType.toInt32(value), strict);
	} else if (value == ScriptRuntime.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 long value, final boolean strict) {
	if (JSType.isRepresentableAsInt(value)) {
	array[index] = JSType.toInt32(value);
	setLength(Math.max(index + 1, length()));
	return this;
	}

	return convert(Long.class).set(index, value, strict);
	}

	@Override
	public ArrayData set(final int index, final double value, final boolean strict) {
	if (JSType.isRepresentableAsInt(value)) {
	array[index] = (int)(long)value;
	setLength(Math.max(index + 1, length()));
	return this;
	}

	return convert(Double.class).set(index, value, strict);
	}

	@Override
	public Type getOptimisticType() {
	return Type.INT;
	}

	@Override
	public int getInt(final int index) {
	return array[index];
	}

	@Override
	public int getIntOptimistic(final int index, final int programPoint) {
	return array[index];
	}

	@Override
	public long getLong(final int index) {
	return array[index];
	}

	@Override
	public long getLongOptimistic(final int index, final int programPoint) {
	return 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() {
	if (length() == 0) {
	return ScriptRuntime.UNDEFINED;
	}

	final int newLength = (int) length() - 1;
	final int 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 IntArrayData(Arrays.copyOfRange(array, (int)from, (int)to), (int)newLength);
	}

	@Override
	public final ArrayData push(final boolean strict, final int item) {
	final long length = length();
	final ArrayData newData = ensure(length);
	if (newData == this) {
	array[(int)length] = item;
	return this;
	}
	return newData.set((int)length, item, strict);
	}

	@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 IntArrayData(Arrays.copyOfRange(array, start, start + removed), removed);

	if (newLength != oldLength) {
	final int[] newArray;

	if (newLength > array.length) {
	newArray = new int[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;
	}
	}