////  TypedArrayPrototype.cpp//////  Created by Clement on 7/14/14.//  Copyright 2014 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include "TypedArrayPrototype.h" #include "TypedArrays.h" Q_DECLARE_METATYPE(QByteArray*) TypedArrayPrototype::TypedArrayPrototype(QObject* parent) : QObject(parent) {} QByteArray* TypedArrayPrototype::thisArrayBuffer() const {    QScriptValue bufferObject = thisObject().data().property(BUFFER_PROPERTY_NAME);    return qscriptvalue_cast<QByteArray*>(bufferObject.data());} void TypedArrayPrototype::set(QScriptValue array, qint32 offset) {    TypedArray* typedArray = static_cast<TypedArray*>(parent());    if (array.isArray() || typedArray) {        if (offset < 0) {            engine()->evaluate("throw \"ArgumentError: negative offset\"");        }        quint32 length = array.property("length").toInt32();        if (offset + (qint32)length > thisObject().data().property(typedArray->_lengthName).toInt32()) {            engine()->evaluate("throw \"ArgumentError: array does not fit\"");            return;        }        for (quint32 i = 0; i < length; ++i) {            thisObject().setProperty(QString::number(offset + i), array.property(QString::number(i)));        }    } else {        engine()->evaluate("throw \"ArgumentError: not an array\"");    }} QScriptValue TypedArrayPrototype::subarray(qint32 begin) {    TypedArray* typedArray = static_cast<TypedArray*>(parent());    QScriptValue arrayBuffer = thisObject().data().property(typedArray->_bufferName);    qint32 byteOffset = thisObject().data().property(typedArray->_byteOffsetName).toInt32();    qint32 length = thisObject().data().property(typedArray->_lengthName).toInt32();    qint32 bytesPerElement = typedArray->_bytesPerElement;        // if indices < 0 then they start from the end of the array    begin = (begin < 0) ? length + begin : begin;        // here we clamp the indices to fit the array    begin = glm::clamp(begin, 0, (length - 1));        byteOffset += begin * bytesPerElement;    return typedArray->newInstance(arrayBuffer, byteOffset, length - begin);} QScriptValue TypedArrayPrototype::subarray(qint32 begin, qint32 end) {    TypedArray* typedArray = static_cast<TypedArray*>(parent());    QScriptValue arrayBuffer = thisObject().data().property(typedArray->_bufferName);    qint32 byteOffset = thisObject().data().property(typedArray->_byteOffsetName).toInt32();    qint32 length = thisObject().data().property(typedArray->_lengthName).toInt32();    qint32 bytesPerElement = typedArray->_bytesPerElement;        // if indices < 0 then they start from the end of the array    begin = (begin < 0) ? length + begin : begin;    end = (end < 0) ? length + end : end;        // here we clamp the indices to fit the array    // note: begin offset is *inclusive* while end offset is *exclusive*    // (see: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/subarray#Parameters)    begin = glm::clamp(begin, 0, (length - 1));    end = glm::clamp(end, 0, length);        byteOffset += begin * bytesPerElement;    length = (end - begin > 0) ? end - begin : 0;    return typedArray->newInstance(arrayBuffer, byteOffset, length);} QScriptValue TypedArrayPrototype::get(quint32 index) {    TypedArray* typedArray = static_cast<TypedArray*>(parent());    QScriptString name = engine()->toStringHandle(QString::number(index));    uint id;    QScriptClass::QueryFlags flags = typedArray->queryProperty(thisObject(),                                                               name,                                                               QScriptClass::HandlesReadAccess, &id);    if (QScriptClass::HandlesReadAccess & flags) {        return typedArray->property(thisObject(), name, id);    }    return QScriptValue();} void TypedArrayPrototype::set(quint32 index, QScriptValue& value) {    TypedArray* typedArray = static_cast<TypedArray*>(parent());    QScriptValue object = thisObject();    QScriptString name = engine()->toStringHandle(QString::number(index));    uint id;    QScriptClass::QueryFlags flags = typedArray->queryProperty(object,                                                               name,                                                               QScriptClass::HandlesWriteAccess, &id);    if (QScriptClass::HandlesWriteAccess & flags) {        typedArray->setProperty(object, name, id, value);    }}