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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.htmlunit.corejs.javascript.typedarrays;
import org.htmlunit.corejs.javascript.Context;
import org.htmlunit.corejs.javascript.IdFunctionObject;
import org.htmlunit.corejs.javascript.ScriptRuntime;
import org.htmlunit.corejs.javascript.ScriptRuntimeES6;
import org.htmlunit.corejs.javascript.Scriptable;
import org.htmlunit.corejs.javascript.Undefined;
/**
* An array view that stores 32-bit quantities and implements the JavaScript "Int32Array" interface.
* It also implements List<Integer> for direct manipulation in Java.
*/
public class NativeInt32Array extends NativeTypedArrayView {
private static final long serialVersionUID = -8963461831950499340L;
private static final String CLASS_NAME = "Int32Array";
private static final int BYTES_PER_ELEMENT = 4;
public NativeInt32Array() {}
public NativeInt32Array(NativeArrayBuffer ab, int off, int len) {
super(ab, off, len, len * BYTES_PER_ELEMENT);
}
public NativeInt32Array(int len) {
this(new NativeArrayBuffer((double) len * BYTES_PER_ELEMENT), 0, len);
}
@Override
public String getClassName() {
return CLASS_NAME;
}
public static void init(Context cx, Scriptable scope, boolean sealed) {
NativeInt32Array a = new NativeInt32Array();
IdFunctionObject constructor = a.exportAsJSClass(MAX_PROTOTYPE_ID, scope, sealed);
ScriptRuntimeES6.addSymbolSpecies(cx, scope, constructor);
}
@Override
protected NativeInt32Array construct(NativeArrayBuffer ab, int off, int len) {
return new NativeInt32Array(ab, off, len);
}
@Override
public int getBytesPerElement() {
return BYTES_PER_ELEMENT;
}
@Override
protected NativeInt32Array realThis(Scriptable thisObj, IdFunctionObject f) {
return ensureType(thisObj, NativeInt32Array.class, f);
}
@Override
protected Object js_get(int index) {
if (checkIndex(index)) {
return Undefined.instance;
}
return ByteIo.readInt32(
arrayBuffer.buffer, (index * BYTES_PER_ELEMENT) + offset, useLittleEndian());
}
@Override
protected Object js_set(int index, Object c) {
if (checkIndex(index)) {
return Undefined.instance;
}
int val = ScriptRuntime.toInt32(c);
ByteIo.writeInt32(
arrayBuffer.buffer, (index * BYTES_PER_ELEMENT) + offset, val, useLittleEndian());
return null;
}
@Override
public Integer get(int i) {
if (checkIndex(i)) {
throw new IndexOutOfBoundsException();
}
return (Integer) js_get(i);
}
@Override
public Integer set(int i, Integer aByte) {
if (checkIndex(i)) {
throw new IndexOutOfBoundsException();
}
return (Integer) js_set(i, aByte);
}
}