org.htmlunit.corejs.javascript.typedarrays.NativeUint16Array Maven / Gradle / Ivy
/* -*- 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.ScriptRuntimeES6;
import org.htmlunit.corejs.javascript.Scriptable;
import org.htmlunit.corejs.javascript.Undefined;
/**
* An array view that stores 16-bit quantities and implements the JavaScript "Uint16Array"
* interface. It also implements List<Integer> for direct manipulation in Java.
*/
public class NativeUint16Array extends NativeTypedArrayView {
private static final long serialVersionUID = 7700018949434240321L;
private static final String CLASS_NAME = "Uint16Array";
private static final int BYTES_PER_ELEMENT = 2;
public NativeUint16Array() {}
public NativeUint16Array(NativeArrayBuffer ab, int off, int len) {
super(ab, off, len, len * BYTES_PER_ELEMENT);
}
public NativeUint16Array(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) {
NativeUint16Array a = new NativeUint16Array();
IdFunctionObject constructor = a.exportAsJSClass(MAX_PROTOTYPE_ID, scope, sealed);
ScriptRuntimeES6.addSymbolSpecies(cx, scope, constructor);
}
@Override
protected NativeUint16Array construct(NativeArrayBuffer ab, int off, int len) {
return new NativeUint16Array(ab, off, len);
}
@Override
public int getBytesPerElement() {
return BYTES_PER_ELEMENT;
}
@Override
protected NativeUint16Array realThis(Scriptable thisObj, IdFunctionObject f) {
return ensureType(thisObj, NativeUint16Array.class, f);
}
@Override
protected Object js_get(int index) {
if (checkIndex(index)) {
return Undefined.instance;
}
return ByteIo.readUint16(
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 = Conversions.toUint16(c);
ByteIo.writeUint16(
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);
}
}