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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the V4VM 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <qv4argumentsobject.h>
namespace QQmlJS {
namespace VM {
static Value throwTypeError(SimpleCallContext *ctx)
{
ctx->throwTypeError();
return Value::undefinedValue();
}
DEFINE_MANAGED_VTABLE(ArgumentsObject);
ArgumentsObject::ArgumentsObject(CallContext *context, int formalParameterCount, int actualParameterCount)
: Object(context->engine), context(context)
{
vtbl = &static_vtbl;
type = Type_ArgumentsObject;
defineDefaultProperty(context->engine->id_length, Value::fromInt32(actualParameterCount));
if (context->strictMode) {
for (uint i = 0; i < context->argumentCount; ++i)
Object::put(context, QString::number(i), context->arguments[i]);
FunctionObject *thrower = context->engine->newBuiltinFunction(context, 0, throwTypeError);
Property pd = Property::fromAccessor(thrower, thrower);
__defineOwnProperty__(context, QStringLiteral("callee"), pd, Attr_Accessor|Attr_NotConfigurable|Attr_NotEnumerable);
__defineOwnProperty__(context, QStringLiteral("caller"), pd, Attr_Accessor|Attr_NotConfigurable|Attr_NotEnumerable);
} else {
uint numAccessors = qMin(formalParameterCount, actualParameterCount);
context->engine->requireArgumentsAccessors(numAccessors);
for (uint i = 0; i < (uint)numAccessors; ++i) {
mappedArguments.append(context->argument(i));
__defineOwnProperty__(context, i, context->engine->argumentsAccessors.at(i), Attr_Accessor);
}
for (uint i = numAccessors; i < qMin((uint)actualParameterCount, context->argumentCount); ++i) {
Property pd = Property::fromValue(context->argument(i));
__defineOwnProperty__(context, i, pd, Attr_Data);
}
defineDefaultProperty(context, QStringLiteral("callee"), Value::fromObject(context->function));
isNonStrictArgumentsObject = true;
}
}
void ArgumentsObject::destroy(Managed *that)
{
static_cast<ArgumentsObject *>(that)->~ArgumentsObject();
}
bool ArgumentsObject::defineOwnProperty(ExecutionContext *ctx, uint index, const Property &desc, PropertyAttributes attrs)
{
uint pidx = propertyIndexFromArrayIndex(index);
Property *pd = arrayData + pidx;
Property map;
PropertyAttributes mapAttrs;
bool isMapped = false;
if (pd && index < (uint)mappedArguments.size())
isMapped = arrayAttributes && arrayAttributes[pidx].isAccessor() && pd->getter() == context->engine->argumentsAccessors.at(index).getter();
if (isMapped) {
map = *pd;
mapAttrs = arrayAttributes[pidx];
arrayAttributes[pidx] = Attr_Data;
pd->value = mappedArguments.at(index);
}
isNonStrictArgumentsObject = false;
bool strict = ctx->strictMode;
ctx->strictMode = false;
bool result = Object::__defineOwnProperty__(ctx, index, desc, attrs);
ctx->strictMode = strict;
isNonStrictArgumentsObject = true;
if (isMapped && attrs.isData()) {
if (!attrs.isGeneric()) {
Value arg = desc.value;
map.setter()->call(ctx, Value::fromObject(this), &arg, 1);
}
if (attrs.isWritable()) {
*pd = map;
arrayAttributes[pidx] = mapAttrs;
}
}
if (ctx->strictMode && !result)
ctx->throwTypeError();
return result;
}
DEFINE_MANAGED_VTABLE(ArgumentsGetterFunction);
Value ArgumentsGetterFunction::call(Managed *getter, ExecutionContext *ctx, const Value &thisObject, Value *, int)
{
ArgumentsGetterFunction *g = static_cast<ArgumentsGetterFunction *>(getter);
Object *that = thisObject.asObject();
if (!that)
ctx->throwTypeError();
ArgumentsObject *o = that->asArgumentsObject();
if (!o)
ctx->throwTypeError();
assert(g->index < o->context->argumentCount);
return o->context->argument(g->index);
}
DEFINE_MANAGED_VTABLE(ArgumentsSetterFunction);
Value ArgumentsSetterFunction::call(Managed *setter, ExecutionContext *ctx, const Value &thisObject, Value *args, int argc)
{
ArgumentsSetterFunction *s = static_cast<ArgumentsSetterFunction *>(setter);
Object *that = thisObject.asObject();
if (!that)
ctx->throwTypeError();
ArgumentsObject *o = that->asArgumentsObject();
if (!o)
ctx->throwTypeError();
assert(s->index < o->context->argumentCount);
o->context->arguments[s->index] = argc ? args[0] : Value::undefinedValue();
return Value::undefinedValue();
}
void ArgumentsObject::markObjects(Managed *that)
{
ArgumentsObject *o = static_cast<ArgumentsObject *>(that);
o->context->mark();
for (int i = 0; i < o->mappedArguments.size(); ++i) {
Managed *m = o->mappedArguments.at(i).asManaged();
if (m)
m->mark();
}
Object::markObjects(that);
}
}
}
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