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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qv4reflect_p.h"
#include "qv4runtimeapi_p.h"
#include "qv4objectproto_p.h"
#include "qv4propertykey_p.h"
#include "qv4objectiterator_p.h"
using namespace QV4;
DEFINE_OBJECT_VTABLE(Reflect);
void Heap::Reflect::init()
{
Object::init();
Scope scope(internalClass->engine);
ScopedObject r(scope, this);
r->defineDefaultProperty(QStringLiteral("apply"), QV4::Reflect::method_apply, 3);
r->defineDefaultProperty(QStringLiteral("construct"), QV4::Reflect::method_construct, 2);
r->defineDefaultProperty(QStringLiteral("defineProperty"), QV4::Reflect::method_defineProperty, 3);
r->defineDefaultProperty(QStringLiteral("deleteProperty"), QV4::Reflect::method_deleteProperty, 2);
r->defineDefaultProperty(QStringLiteral("get"), QV4::Reflect::method_get, 2);
r->defineDefaultProperty(QStringLiteral("getOwnPropertyDescriptor"), QV4::Reflect::method_getOwnPropertyDescriptor, 2);
r->defineDefaultProperty(QStringLiteral("getPrototypeOf"), QV4::Reflect::method_getPrototypeOf, 1);
r->defineDefaultProperty(QStringLiteral("has"), QV4::Reflect::method_has, 2);
r->defineDefaultProperty(QStringLiteral("isExtensible"), QV4::Reflect::method_isExtensible, 1);
r->defineDefaultProperty(QStringLiteral("ownKeys"), QV4::Reflect::method_ownKeys, 1);
r->defineDefaultProperty(QStringLiteral("preventExtensions"), QV4::Reflect::method_preventExtensions, 1);
r->defineDefaultProperty(QStringLiteral("set"), QV4::Reflect::method_set, 3);
r->defineDefaultProperty(QStringLiteral("setPrototypeOf"), QV4::Reflect::method_setPrototypeOf, 2);
}
struct CallArgs {
Value *argv;
int argc;
};
static CallArgs createListFromArrayLike(Scope &scope, const Object *o)
{
int len = scope.engine->safeForAllocLength(o->getLength());
if (scope.engine->hasException)
return {nullptr, 0};
Value *arguments = scope.alloc(len);
for (int i = 0; i < len; ++i) {
arguments[i] = o->get(i);
if (scope.hasException())
return { nullptr, 0 };
}
return { arguments, len };
}
ReturnedValue Reflect::method_apply(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
Scope scope(f);
if (argc < 3 || !argv[0].isFunctionObject() || !argv[2].isObject())
return scope.engine->throwTypeError();
const Object *o = static_cast<const Object *>(argv + 2);
CallArgs arguments = createListFromArrayLike(scope, o);
if (scope.hasException())
return Encode::undefined();
return checkedResult(scope.engine, static_cast<const FunctionObject &>(argv[0]).call(
&argv[1], arguments.argv, arguments.argc));
}
ReturnedValue Reflect::method_construct(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
Scope scope(f);
if (argc < 2 || !argv[1].isObject())
return scope.engine->throwTypeError();
const FunctionObject *target = argv[0].as<FunctionObject>();
const FunctionObject *newTarget = argc == 3 ? argv[2].as<FunctionObject>() : target;
if (!target || !target->isConstructor() || !newTarget || !newTarget->isConstructor())
return scope.engine->throwTypeError();
const Object *o = static_cast<const Object *>(argv + 1);
CallArgs arguments = createListFromArrayLike(scope, o);
if (scope.hasException())
return Encode::undefined();
return target->callAsConstructor(arguments.argv, arguments.argc, newTarget);
}
ReturnedValue Reflect::method_defineProperty(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
Scope scope(f);
if (!argc || !argv[0].isObject())
return scope.engine->throwTypeError();
ScopedObject O(scope, argv[0]);
ScopedPropertyKey name(scope, (argc > 1 ? argv[1] : Value::undefinedValue()).toPropertyKey(scope.engine));
if (scope.hasException())
return QV4::Encode::undefined();
ScopedValue attributes(scope, argc > 2 ? argv[2] : Value::undefinedValue());
ScopedProperty pd(scope);
PropertyAttributes attrs;
ObjectPrototype::toPropertyDescriptor(scope.engine, attributes, pd, &attrs);
if (scope.hasException())
return QV4::Encode::undefined();
bool result = O->defineOwnProperty(name, pd, attrs);
return Encode(result);
}
ReturnedValue Reflect::method_deleteProperty(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
ExecutionEngine *e = f->engine();
if (!argc || !argv[0].isObject())
return e->throwTypeError();
bool result = Runtime::DeleteProperty_NoThrow::call(e, argv[0], argc > 1 ? argv[1] : Value::undefinedValue());
return Encode(result);
}
ReturnedValue Reflect::method_get(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
Scope scope(f);
if (!argc || !argv[0].isObject())
return scope.engine->throwTypeError();
ScopedObject o(scope, static_cast<const Object *>(argv));
Value undef = Value::undefinedValue();
const Value *index = argc > 1 ? &argv[1] : &undef;
ScopedPropertyKey name(scope, index->toPropertyKey(scope.engine));
if (scope.hasException())
return Encode::undefined();
ScopedValue receiver(scope, argc > 2 ? argv[2] : *o);
return Encode(o->get(name, receiver));
}
ReturnedValue Reflect::method_getOwnPropertyDescriptor(const FunctionObject *f, const Value *thisObject, const Value *argv, int argc)
{
if (!argc || !argv[0].isObject())
return f->engine()->throwTypeError();
return ObjectPrototype::method_getOwnPropertyDescriptor(f, thisObject, argv, argc);
}
ReturnedValue Reflect::method_getPrototypeOf(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
if (!argc || !argv[0].isObject())
return f->engine()->throwTypeError();
const Object *o = static_cast<const Object *>(argv);
Heap::Object *p = o->getPrototypeOf();
return (p ? p->asReturnedValue() : Encode::null());
}
ReturnedValue Reflect::method_has(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
Scope scope(f);
if (!argc || !argv[0].isObject())
return scope.engine->throwTypeError();
ScopedObject o(scope, static_cast<const Object *>(argv));
Value undef = Value::undefinedValue();
const Value *index = argc > 1 ? &argv[1] : &undef;
ScopedPropertyKey name(scope, index->toPropertyKey(scope.engine));
if (scope.hasException())
return false;
return Encode(o->hasProperty(name));
}
ReturnedValue Reflect::method_isExtensible(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
if (!argc || !argv[0].isObject())
return f->engine()->throwTypeError();
const Object *o = static_cast<const Object *>(argv);
return Encode(o->isExtensible());
}
ReturnedValue Reflect::method_ownKeys(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
if (!argc || !argv[0].isObject())
return f->engine()->throwTypeError();
Scope scope(f);
if (!argc)
return scope.engine->throwTypeError();
ScopedObject O(scope, argv[0].toObject(scope.engine));
if (!O)
return Encode::undefined();
ScopedArrayObject keys(scope, scope.engine->newArrayObject());
ObjectIterator it(scope, O, ObjectIterator::WithSymbols);
ScopedPropertyKey key(scope);
ScopedValue v(scope);
while (1) {
key = it.next();
if (!key->isValid())
break;
v = key->toStringOrSymbol(scope.engine);
keys->push_back(v);
}
return keys->asReturnedValue();
}
ReturnedValue Reflect::method_preventExtensions(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
Scope scope(f);
if (!argc || !argv[0].isObject())
return scope.engine->throwTypeError();
ScopedObject o(scope, static_cast<const Object *>(argv));
return Encode(o->preventExtensions());
}
ReturnedValue Reflect::method_set(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
Scope scope(f);
if (!argc || !argv[0].isObject())
return scope.engine->throwTypeError();
ScopedObject o(scope, static_cast<const Object *>(argv));
Value undef = Value::undefinedValue();
const Value *index = argc > 1 ? &argv[1] : &undef;
const Value &val = argc > 2 ? argv[2] : undef;
ScopedValue receiver(scope, argc >3 ? argv[3] : argv[0]);
ScopedPropertyKey propertyKey(scope, index->toPropertyKey(scope.engine));
if (scope.hasException())
return false;
bool result = o->put(propertyKey, val, receiver);
return Encode(result);
}
ReturnedValue Reflect::method_setPrototypeOf(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
if (argc < 2 || !argv[0].isObject() || (!argv[1].isNull() && !argv[1].isObject()))
return f->engine()->throwTypeError();
Scope scope(f);
ScopedObject o(scope, static_cast<const Object *>(argv));
const Object *proto = argv[1].isNull() ? nullptr : static_cast<const Object *>(argv + 1);
return Encode(o->setPrototypeOf(proto));
}
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