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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QV4JSCALL_H
#define QV4JSCALL_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "qv4object_p.h"
#include "qv4function_p.h"
#include "qv4functionobject_p.h"
#include "qv4context_p.h"
#include "qv4scopedvalue_p.h"
QT_BEGIN_NAMESPACE
namespace QV4 {
struct JSCallData {
JSCallData(const Scope &scope, int argc = 0, const Value *argv = nullptr, const Value *thisObject = nullptr)
: scope(scope), argc(argc)
{
if (thisObject)
this->thisObject = const_cast<Value *>(thisObject);
else
this->thisObject = scope.alloc(1);
if (argv)
this->args = const_cast<Value *>(argv);
else
this->args = scope.alloc(argc);
}
JSCallData *operator->() {
return this;
}
CallData *callData(const FunctionObject *f = nullptr) const {
int size = int(offsetof(QV4::CallData, args)/sizeof(QV4::Value)) + argc;
CallData *ptr = reinterpret_cast<CallData *>(scope.engine->jsStackTop);
scope.engine->jsStackTop += size;
ptr->function = Encode::undefined();
ptr->context = Encode::undefined();
ptr->accumulator = Encode::undefined();
ptr->thisObject = thisObject->asReturnedValue();
ptr->setArgc(argc);
if (argc)
memcpy(ptr->args, args, argc*sizeof(Value));
if (f)
ptr->function = f->asReturnedValue();
return ptr;
}
const Scope &scope;
int argc;
Value *args;
Value *thisObject;
};
inline
ReturnedValue FunctionObject::callAsConstructor(const JSCallData &data) const
{
return d()->jsConstruct(this, data.args, data.argc);
}
inline
ReturnedValue FunctionObject::call(const JSCallData &data) const
{
return d()->jsCall(this, data.thisObject, data.args, data.argc);
}
struct ScopedStackFrame {
Scope &scope;
CppStackFrame frame;
ScopedStackFrame(Scope &scope, Heap::ExecutionContext *context)
: scope(scope)
{
frame.parent = scope.engine->currentStackFrame;
if (!context)
return;
frame.jsFrame = reinterpret_cast<CallData *>(scope.alloc(sizeof(CallData)/sizeof(Value)));
frame.jsFrame->context = context;
frame.v4Function = frame.parent ? frame.parent->v4Function : nullptr;
scope.engine->currentStackFrame = &frame;
}
~ScopedStackFrame() {
scope.engine->currentStackFrame = frame.parent;
}
};
}
QT_END_NAMESPACE
#endif // QV4JSCALL_H
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