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/****************************************************************************
**
** Copyright (C) 2016 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <qv4argumentsobject_p.h>
#include <qv4alloca_p.h>
#include <qv4scopedvalue_p.h>
#include "qv4string_p.h"
using namespace QV4;
DEFINE_OBJECT_VTABLE(ArgumentsObject);
Heap::ArgumentsObject::ArgumentsObject(QV4::CallContext *context)
: context(context->d())
, fullyCreated(false)
{
Q_ASSERT(vtable() == QV4::ArgumentsObject::staticVTable());
ExecutionEngine *v4 = context->d()->engine;
Scope scope(v4);
Scoped<QV4::ArgumentsObject> args(scope, this);
args->setArrayType(Heap::ArrayData::Complex);
if (context->d()->strictMode) {
Q_ASSERT(CalleePropertyIndex == args->internalClass()->find(context->d()->engine->id_callee()));
Q_ASSERT(CallerPropertyIndex == args->internalClass()->find(context->d()->engine->id_caller()));
*args->propertyData(CalleePropertyIndex + QV4::Object::GetterOffset) = v4->thrower();
*args->propertyData(CalleePropertyIndex + QV4::Object::SetterOffset) = v4->thrower();
*args->propertyData(CallerPropertyIndex + QV4::Object::GetterOffset) = v4->thrower();
*args->propertyData(CallerPropertyIndex + QV4::Object::SetterOffset) = v4->thrower();
args->arrayReserve(context->argc());
args->arrayPut(0, context->args(), context->argc());
args->d()->fullyCreated = true;
} else {
Q_ASSERT(CalleePropertyIndex == args->internalClass()->find(context->d()->engine->id_callee()));
*args->propertyData(CalleePropertyIndex) = context->d()->function->asReturnedValue();
}
Q_ASSERT(LengthPropertyIndex == args->internalClass()->find(context->d()->engine->id_length()));
*args->propertyData(LengthPropertyIndex) = Primitive::fromInt32(context->d()->callData->argc);
}
void ArgumentsObject::fullyCreate()
{
if (fullyCreated())
return;
uint argCount = context()->callData->argc;
uint numAccessors = qMin(context()->function->formalParameterCount(), argCount);
ArrayData::realloc(this, Heap::ArrayData::Sparse, argCount, true);
context()->engine->requireArgumentsAccessors(numAccessors);
Scope scope(engine());
Scoped<MemberData> md(scope, d()->mappedArguments);
d()->mappedArguments = md->allocate(engine(), numAccessors);
for (uint i = 0; i < numAccessors; ++i) {
d()->mappedArguments->data[i] = context()->callData->args[i];
arraySet(i, context()->engine->argumentsAccessors + i, Attr_Accessor);
}
arrayPut(numAccessors, context()->callData->args + numAccessors, argCount - numAccessors);
for (uint i = numAccessors; i < argCount; ++i)
setArrayAttributes(i, Attr_Data);
d()->fullyCreated = true;
}
bool ArgumentsObject::defineOwnProperty(ExecutionEngine *engine, uint index, const Property *desc, PropertyAttributes attrs)
{
fullyCreate();
Scope scope(engine);
Property *pd = arrayData() ? arrayData()->getProperty(index) : 0;
ScopedProperty map(scope);
PropertyAttributes mapAttrs;
bool isMapped = false;
uint numAccessors = qMin((int)context()->function->formalParameterCount(), context()->callData->argc);
if (pd && index < (uint)numAccessors)
isMapped = arrayData()->attributes(index).isAccessor() &&
pd->getter() == context()->engine->argumentsAccessors[index].getter();
if (isMapped) {
Q_ASSERT(arrayData());
mapAttrs = arrayData()->attributes(index);
map->copy(pd, mapAttrs);
setArrayAttributes(index, Attr_Data);
pd = arrayData()->getProperty(index);
pd->value = d()->mappedArguments->data[index];
}
bool strict = engine->current->strictMode;
engine->current->strictMode = false;
bool result = Object::defineOwnProperty2(scope.engine, index, desc, attrs);
engine->current->strictMode = strict;
if (isMapped && attrs.isData()) {
Q_ASSERT(arrayData());
ScopedFunctionObject setter(scope, map->setter());
ScopedCallData callData(scope, 1);
callData->thisObject = this->asReturnedValue();
callData->args[0] = desc->value;
setter->call(callData);
if (attrs.isWritable()) {
setArrayAttributes(index, mapAttrs);
pd = arrayData()->getProperty(index);
pd->copy(map, mapAttrs);
}
}
if (engine->current->strictMode && !result)
return engine->throwTypeError();
return result;
}
ReturnedValue ArgumentsObject::getIndexed(const Managed *m, uint index, bool *hasProperty)
{
const ArgumentsObject *args = static_cast<const ArgumentsObject *>(m);
if (args->fullyCreated())
return Object::getIndexed(m, index, hasProperty);
if (index < static_cast<uint>(args->context()->callData->argc)) {
if (hasProperty)
*hasProperty = true;
return args->context()->callData->args[index].asReturnedValue();
}
if (hasProperty)
*hasProperty = false;
return Encode::undefined();
}
void ArgumentsObject::putIndexed(Managed *m, uint index, const Value &value)
{
ArgumentsObject *args = static_cast<ArgumentsObject *>(m);
if (!args->fullyCreated() && index >= static_cast<uint>(args->context()->callData->argc))
args->fullyCreate();
if (args->fullyCreated()) {
Object::putIndexed(m, index, value);
return;
}
args->context()->callData->args[index] = value;
}
bool ArgumentsObject::deleteIndexedProperty(Managed *m, uint index)
{
ArgumentsObject *args = static_cast<ArgumentsObject *>(m);
if (!args->fullyCreated())
args->fullyCreate();
return Object::deleteIndexedProperty(m, index);
}
PropertyAttributes ArgumentsObject::queryIndexed(const Managed *m, uint index)
{
const ArgumentsObject *args = static_cast<const ArgumentsObject *>(m);
if (args->fullyCreated())
return Object::queryIndexed(m, index);
uint numAccessors = qMin((int)args->context()->function->formalParameterCount(), args->context()->callData->argc);
uint argCount = args->context()->callData->argc;
if (index >= argCount)
return PropertyAttributes();
if (index >= numAccessors)
return Attr_Data;
return Attr_Accessor;
}
DEFINE_OBJECT_VTABLE(ArgumentsGetterFunction);
ReturnedValue ArgumentsGetterFunction::call(const Managed *getter, CallData *callData)
{
ExecutionEngine *v4 = static_cast<const ArgumentsGetterFunction *>(getter)->engine();
Scope scope(v4);
Scoped<ArgumentsGetterFunction> g(scope, static_cast<const ArgumentsGetterFunction *>(getter));
Scoped<ArgumentsObject> o(scope, callData->thisObject.as<ArgumentsObject>());
if (!o)
return v4->throwTypeError();
Q_ASSERT(g->index() < static_cast<unsigned>(o->context()->callData->argc));
return o->context()->callData->args[g->index()].asReturnedValue();
}
DEFINE_OBJECT_VTABLE(ArgumentsSetterFunction);
ReturnedValue ArgumentsSetterFunction::call(const Managed *setter, CallData *callData)
{
ExecutionEngine *v4 = static_cast<const ArgumentsSetterFunction *>(setter)->engine();
Scope scope(v4);
Scoped<ArgumentsSetterFunction> s(scope, static_cast<const ArgumentsSetterFunction *>(setter));
Scoped<ArgumentsObject> o(scope, callData->thisObject.as<ArgumentsObject>());
if (!o)
return v4->throwTypeError();
Q_ASSERT(s->index() < static_cast<unsigned>(o->context()->callData->argc));
o->context()->callData->args[s->index()] = callData->argc ? callData->args[0].asReturnedValue() : Encode::undefined();
return Encode::undefined();
}
void ArgumentsObject::markObjects(Heap::Base *that, ExecutionEngine *e)
{
ArgumentsObject::Data *o = static_cast<ArgumentsObject::Data *>(that);
if (o->context)
o->context->mark(e);
if (o->mappedArguments)
o->mappedArguments->mark(e);
Object::markObjects(that, e);
}
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