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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 2136 insertions, 0 deletions

diff --git a/src/script/api/qscriptvalue.cpp b/src/script/api/qscriptvalue.cpp
new file mode 100644
index 0000000..91ce9c8
--- /dev/null
+++ b/src/script/api/qscriptvalue.cpp
@@ -0,0 +1,2136 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtScript module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL-ONLY$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "config.h"
+#include "qscriptvalue.h"
+
+#include "qscriptvalue_p.h"
+#include "qscriptengine.h"
+#include "qscriptengine_p.h"
+#include "qscriptstring_p.h"
+
+#include "JSGlobalObject.h"
+#include "JSImmediate.h"
+#include "JSObject.h"
+#include "JSValue.h"
+#include "JSFunction.h"
+#include "Identifier.h"
+#include "Operations.h"
+#include "Arguments.h"
+
+#include <QtCore/qvariant.h>
+#include <QtCore/qvarlengtharray.h>
+#include <QtCore/qnumeric.h>
+
+/*!
+  \since 4.3
+  \class QScriptValue
+
+  \brief The QScriptValue class acts as a container for the Qt Script data types.
+
+  \ingroup script
+  \mainclass
+
+  QScriptValue supports the types defined in the \l{ECMA-262}
+  standard: The primitive types, which are Undefined, Null, Boolean,
+  Number, and String; and the Object type. Additionally, Qt Script
+  has built-in support for QVariant, QObject and QMetaObject.
+
+  For the object-based types (including Date and RegExp), use the
+  newT() functions in QScriptEngine (e.g. QScriptEngine::newObject())
+  to create a QScriptValue of the desired type. For the primitive types,
+  use one of the QScriptValue constructor overloads.
+
+  The methods named isT() (e.g. isBool(), isUndefined()) can be
+  used to test if a value is of a certain type. The methods named
+  toT() (e.g. toBool(), toString()) can be used to convert a
+  QScriptValue to another type. You can also use the generic
+  qscriptvalue_cast() function.
+
+  Object values have zero or more properties which are themselves
+  QScriptValues. Use setProperty() to set a property of an object, and
+  call property() to retrieve the value of a property.
+
+  \snippet doc/src/snippets/code/src_script_qscriptvalue.cpp 0
+
+  Each property can have a set of attributes; these are specified as
+  the third (optional) argument to setProperty(). The attributes of a
+  property can be queried by calling the propertyFlags() function. The
+  following code snippet creates a property that cannot be modified by
+  script code:
+
+  \snippet doc/src/snippets/code/src_script_qscriptvalue.cpp 1
+
+  If you want to iterate over the properties of a script object, use
+  the QScriptValueIterator class.
+
+  Object values have an internal \c{prototype} property, which can be
+  accessed with prototype() and setPrototype(). Properties added to a
+  prototype are shared by all objects having that prototype; this is
+  referred to as prototype-based inheritance. In practice, it means
+  that (by default) the property() function will automatically attempt
+  to look up look the property in the prototype() (and in the
+  prototype of the prototype(), and so on), if the object itself does
+  not have the requested property. Note that this prototype-based
+  lookup is not performed by setProperty(); setProperty() will always
+  create the property in the script object itself.  For more
+  information, see the \l{QtScript} documentation.
+
+  Function objects (objects for which isFunction() returns true) can
+  be invoked by calling call(). Constructor functions can be used to
+  construct new objects by calling construct().
+
+  Use equals(), strictlyEquals() and lessThan() to compare a QScriptValue
+  to another.
+
+  Object values can have custom data associated with them; see the
+  setData() and data() functions. By default, this data is not
+  accessible to scripts; it can be used to store any data you want to
+  associate with the script object. Typically this is used by custom
+  class objects (see QScriptClass) to store a C++ type that contains
+  the "native" object data.
+
+  Note that a QScriptValue for which isObject() is true only carries a
+  reference to an actual object; copying the QScriptValue will only
+  copy the object reference, not the object itself. If you want to
+  clone an object (i.e. copy an object's properties to another
+  object), you can do so with the help of a \c{for-in} statement in
+  script code, or QScriptValueIterator in C++.
+
+  \sa QScriptEngine, QScriptValueIterator
+*/
+
+/*!
+    \enum QScriptValue::SpecialValue
+
+    This enum is used to specify a single-valued type.
+
+    \value UndefinedValue An undefined value.
+
+    \value NullValue A null value.
+*/
+
+/*!
+    \enum QScriptValue::PropertyFlag
+
+    This enum describes the attributes of a property.
+
+    \value ReadOnly The property is read-only. Attempts by Qt Script code to write to the property will be ignored.
+
+    \value Undeletable Attempts by Qt Script code to \c{delete} the property will be ignored.
+
+    \value SkipInEnumeration The property is not to be enumerated by a \c{for-in} enumeration.
+
+    \value PropertyGetter The property is defined by a function which will be called to get the property value.
+
+    \value PropertySetter The property is defined by a function which will be called to set the property value.
+
+    \omitvalue QObjectMember This flag is used to indicate that an existing property is a QObject member (a property or method).
+
+    \value KeepExistingFlags This value is used to indicate to setProperty() that the property's flags should be left unchanged. If the property doesn't exist, the default flags (0) will be used.
+
+    \omitvalue UserRange Flags in this range are not used by Qt Script, and can be used for custom purposes.
+*/
+
+/*!
+    \enum QScriptValue::ResolveFlag
+
+    This enum specifies how to look up a property of an object.
+
+    \value ResolveLocal Only check the object's own properties.
+
+    \value ResolvePrototype Check the object's own properties first, then search the prototype chain. This is the default.
+
+    \omitvalue ResolveScope Check the object's own properties first, then search the scope chain.
+
+    \omitvalue ResolveFull Check the object's own properties first, then search the prototype chain, and finally search the scope chain.
+*/
+
+QT_BEGIN_NAMESPACE
+
+void QScriptValuePrivate::detachFromEngine()
+{
+    if (isJSC())
+        jscValue = JSC::JSValue();
+    engine = 0;
+}
+
+/*!
+  \internal
+*/
+QScriptValue::QScriptValue(QScriptValuePrivate *d)
+    : d_ptr(d)
+{
+}
+
+/*!
+  Constructs an invalid QScriptValue.
+*/
+QScriptValue::QScriptValue()
+    : d_ptr(0)
+{
+}
+
+/*!
+  Destroys this QScriptValue.
+*/
+QScriptValue::~QScriptValue()
+{
+}
+
+/*!
+  Constructs a new QScriptValue that is a copy of \a other.
+
+  Note that if \a other is an object (i.e., isObject() would return
+  true), then only a reference to the underlying object is copied into
+  the new script value (i.e., the object itself is not copied).
+*/
+QScriptValue::QScriptValue(const QScriptValue &other)
+    : d_ptr(other.d_ptr)
+{
+}
+
+/*!
+  \obsolete
+
+  Constructs a new QScriptValue with the special \a value and
+  registers it with the script \a engine.
+*/
+QScriptValue::QScriptValue(QScriptEngine *engine, QScriptValue::SpecialValue value)
+    : d_ptr(new (QScriptEnginePrivate::get(engine))QScriptValuePrivate(QScriptEnginePrivate::get(engine)))
+{
+    switch (value) {
+    case NullValue:
+        d_ptr->initFrom(JSC::jsNull());
+        break;
+    case UndefinedValue:
+        d_ptr->initFrom(JSC::jsUndefined());
+        break;
+    }
+}
+
+/*!
+  \obsolete
+
+  \fn QScriptValue::QScriptValue(QScriptEngine *engine, bool value)
+
+  Constructs a new QScriptValue with the boolean \a value and
+  registers it with the script \a engine.
+*/
+QScriptValue::QScriptValue(QScriptEngine *engine, bool val)
+    : d_ptr(new (QScriptEnginePrivate::get(engine))QScriptValuePrivate(QScriptEnginePrivate::get(engine)))
+{
+    d_ptr->initFrom(JSC::jsBoolean(val));
+}
+
+/*!
+  \fn QScriptValue::QScriptValue(QScriptEngine *engine, int value)
+  \obsolete
+
+  Constructs a new QScriptValue with the integer \a value and
+  registers it with the script \a engine.
+*/
+QScriptValue::QScriptValue(QScriptEngine *engine, int val)
+    : d_ptr(new (QScriptEnginePrivate::get(engine))QScriptValuePrivate(QScriptEnginePrivate::get(engine)))
+{
+    if (engine) {
+        QScript::APIShim shim(d_ptr->engine);
+        JSC::ExecState *exec = d_ptr->engine->currentFrame;
+        d_ptr->initFrom(JSC::jsNumber(exec, val));
+    } else
+        d_ptr->initFrom(val);
+}
+
+/*!
+  \fn QScriptValue::QScriptValue(QScriptEngine *engine, uint value)
+  \obsolete
+
+  Constructs a new QScriptValue with the unsigned integer \a value and
+  registers it with the script \a engine.
+ */
+QScriptValue::QScriptValue(QScriptEngine *engine, uint val)
+    : d_ptr(new (QScriptEnginePrivate::get(engine))QScriptValuePrivate(QScriptEnginePrivate::get(engine)))
+{
+    if (engine) {
+        QScript::APIShim shim(d_ptr->engine);
+        JSC::ExecState *exec = d_ptr->engine->currentFrame;
+        d_ptr->initFrom(JSC::jsNumber(exec, val));
+    } else
+        d_ptr->initFrom(val);
+}
+
+/*!
+  \fn QScriptValue::QScriptValue(QScriptEngine *engine, qsreal value)
+  \obsolete
+
+  Constructs a new QScriptValue with the qsreal \a value and
+  registers it with the script \a engine.
+*/
+QScriptValue::QScriptValue(QScriptEngine *engine, qsreal val)
+    : d_ptr(new (QScriptEnginePrivate::get(engine))QScriptValuePrivate(QScriptEnginePrivate::get(engine)))
+{
+    if (engine) {
+        QScript::APIShim shim(d_ptr->engine);
+        JSC::ExecState *exec = d_ptr->engine->currentFrame;
+        d_ptr->initFrom(JSC::jsNumber(exec, val));
+    } else
+        d_ptr->initFrom(val);
+}
+
+/*!
+  \fn QScriptValue::QScriptValue(QScriptEngine *engine, const QString &value)
+  \obsolete
+
+  Constructs a new QScriptValue with the string \a value and
+  registers it with the script \a engine.
+*/
+QScriptValue::QScriptValue(QScriptEngine *engine, const QString &val)
+    : d_ptr(new (QScriptEnginePrivate::get(engine))QScriptValuePrivate(QScriptEnginePrivate::get(engine)))
+{
+    if (engine) {
+        QScript::APIShim shim(d_ptr->engine);
+        JSC::ExecState *exec = d_ptr->engine->currentFrame;
+        d_ptr->initFrom(JSC::jsString(exec, val));
+    } else {
+        d_ptr->initFrom(val);
+    }
+}
+
+/*!
+  \fn QScriptValue::QScriptValue(QScriptEngine *engine, const char *value)
+  \obsolete
+
+  Constructs a new QScriptValue with the string \a value and
+  registers it with the script \a engine.
+*/
+
+#ifndef QT_NO_CAST_FROM_ASCII
+QScriptValue::QScriptValue(QScriptEngine *engine, const char *val)
+    : d_ptr(new (QScriptEnginePrivate::get(engine))QScriptValuePrivate(QScriptEnginePrivate::get(engine)))
+{
+    if (engine) {
+        QScript::APIShim shim(d_ptr->engine);
+        JSC::ExecState *exec = d_ptr->engine->currentFrame;
+        d_ptr->initFrom(JSC::jsString(exec, val));
+    } else {
+        d_ptr->initFrom(QString::fromAscii(val));
+    }
+}
+#endif
+
+/*!
+  \since 4.5
+
+  Constructs a new QScriptValue with a special \a value.
+*/
+QScriptValue::QScriptValue(SpecialValue value)
+    : d_ptr(new (/*engine=*/0)QScriptValuePrivate(/*engine=*/0))
+{
+    switch (value) {
+    case NullValue:
+        d_ptr->initFrom(JSC::jsNull());
+        break;
+    case UndefinedValue:
+        d_ptr->initFrom(JSC::jsUndefined());
+        break;
+    }
+}
+
+/*!
+  \since 4.5
+
+  Constructs a new QScriptValue with a boolean \a value.
+*/
+QScriptValue::QScriptValue(bool value)
+    : d_ptr(new (/*engine=*/0)QScriptValuePrivate(/*engine=*/0))
+{
+    d_ptr->initFrom(JSC::jsBoolean(value));
+}
+
+/*!
+  \since 4.5
+
+  Constructs a new QScriptValue with a number \a value.
+*/
+QScriptValue::QScriptValue(int value)
+    : d_ptr(new (/*engine=*/0)QScriptValuePrivate(/*engine=*/0))
+{
+    d_ptr->initFrom(value);
+}
+
+/*!
+  \since 4.5
+
+  Constructs a new QScriptValue with a number \a value.
+*/
+QScriptValue::QScriptValue(uint value)
+    : d_ptr(new (/*engine=*/0)QScriptValuePrivate(/*engine=*/0))
+{
+    d_ptr->initFrom(value);
+}
+
+/*!
+  \since 4.5
+
+  Constructs a new QScriptValue with a number \a value.
+*/
+QScriptValue::QScriptValue(qsreal value)
+    : d_ptr(new (/*engine=*/0)QScriptValuePrivate(/*engine=*/0))
+{
+    d_ptr->initFrom(value);
+}
+
+/*!
+  \since 4.5
+
+  Constructs a new QScriptValue with a string \a value.
+*/
+QScriptValue::QScriptValue(const QString &value)
+    : d_ptr(new (/*engine=*/0)QScriptValuePrivate(/*engine=*/0))
+{
+    d_ptr->initFrom(value);
+}
+
+/*!
+  \since 4.5
+
+  Constructs a new QScriptValue with a string \a value.
+*/
+QScriptValue::QScriptValue(const QLatin1String &value)
+    : d_ptr(new (/*engine=*/0)QScriptValuePrivate(/*engine=*/0))
+{
+    d_ptr->initFrom(value);
+}
+
+/*!
+  \since 4.5
+
+  Constructs a new QScriptValue with a string \a value.
+*/
+
+#ifndef QT_NO_CAST_FROM_ASCII
+QScriptValue::QScriptValue(const char *value)
+    : d_ptr(new (/*engine=*/0)QScriptValuePrivate(/*engine=*/0))
+{
+    d_ptr->initFrom(QString::fromAscii(value));
+}
+#endif
+
+/*!
+  Assigns the \a other value to this QScriptValue.
+
+  Note that if \a other is an object (isObject() returns true),
+  only a reference to the underlying object will be assigned;
+  the object itself will not be copied.
+*/
+QScriptValue &QScriptValue::operator=(const QScriptValue &other)
+{
+    d_ptr = other.d_ptr;
+    return *this;
+}
+
+/*!
+  Returns true if this QScriptValue is an object of the Error class;
+  otherwise returns false.
+
+  \sa QScriptContext::throwError()
+*/
+bool QScriptValue::isError() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isJSC())
+        return false;
+    return QScriptEnginePrivate::isError(d->jscValue);
+}
+
+/*!
+  Returns true if this QScriptValue is an object of the Array class;
+  otherwise returns false.
+
+  \sa QScriptEngine::newArray()
+*/
+bool QScriptValue::isArray() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isJSC())
+        return false;
+    return QScriptEnginePrivate::isArray(d->jscValue);
+}
+
+/*!
+  Returns true if this QScriptValue is an object of the Date class;
+  otherwise returns false.
+
+  \sa QScriptEngine::newDate()
+*/
+bool QScriptValue::isDate() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isJSC())
+        return false;
+    return QScriptEnginePrivate::isDate(d->jscValue);
+}
+
+/*!
+  Returns true if this QScriptValue is an object of the RegExp class;
+  otherwise returns false.
+
+  \sa QScriptEngine::newRegExp()
+*/
+bool QScriptValue::isRegExp() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isJSC())
+        return false;
+    return QScriptEnginePrivate::isRegExp(d->jscValue);
+}
+
+/*!
+  If this QScriptValue is an object, returns the internal prototype
+  (\c{__proto__} property) of this object; otherwise returns an
+  invalid QScriptValue.
+
+  \sa setPrototype(), isObject()
+*/
+QScriptValue QScriptValue::prototype() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isObject())
+        return QScriptValue();
+    return d->engine->scriptValueFromJSCValue(JSC::asObject(d->jscValue)->prototype());
+}
+
+/*!
+  If this QScriptValue is an object, sets the internal prototype
+  (\c{__proto__} property) of this object to be \a prototype;
+  otherwise does nothing.
+
+  The internal prototype should not be confused with the public
+  property with name "prototype"; the public prototype is usually
+  only set on functions that act as constructors.
+
+  \sa prototype(), isObject()
+*/
+void QScriptValue::setPrototype(const QScriptValue &prototype)
+{
+    Q_D(QScriptValue);
+    if (!d || !d->isObject())
+        return;
+
+    JSC::JSValue other = d->engine->scriptValueToJSCValue(prototype);
+    if (!other || !(other.isObject() || other.isNull()))
+        return;
+
+    if (QScriptValuePrivate::getEngine(prototype)
+        && (QScriptValuePrivate::getEngine(prototype) != d->engine)) {
+        qWarning("QScriptValue::setPrototype() failed: "
+                 "cannot set a prototype created in "
+                 "a different engine");
+        return;
+    }
+    JSC::JSObject *thisObject = JSC::asObject(d->jscValue);
+
+    // check for cycle
+    JSC::JSValue nextPrototypeValue = other;
+    while (nextPrototypeValue && nextPrototypeValue.isObject()) {
+        JSC::JSObject *nextPrototype = JSC::asObject(nextPrototypeValue);
+        if (nextPrototype == thisObject) {
+            qWarning("QScriptValue::setPrototype() failed: cyclic prototype value");
+            return;
+        }
+        nextPrototypeValue = nextPrototype->prototype();
+    }
+
+    thisObject->setPrototype(other);
+
+    // Sync the internal Global Object prototype if appropriate.
+    if (((thisObject == d->engine->originalGlobalObjectProxy)
+         && !d->engine->customGlobalObject())
+        || (thisObject == d->engine->customGlobalObject())) {
+        d->engine->originalGlobalObject()->setPrototype(other);
+    }
+}
+
+/*!
+  \internal
+*/
+QScriptValue QScriptValue::scope() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isObject())
+        return QScriptValue();
+    QScript::APIShim shim(d->engine);
+    // ### make hidden property
+    JSC::JSValue result = d->property("__qt_scope__", QScriptValue::ResolveLocal);
+    return d->engine->scriptValueFromJSCValue(result);
+}
+
+/*!
+  \internal
+*/
+void QScriptValue::setScope(const QScriptValue &scope)
+{
+    Q_D(QScriptValue);
+    if (!d || !d->isObject())
+        return;
+    if (scope.isValid() && QScriptValuePrivate::getEngine(scope)
+        && (QScriptValuePrivate::getEngine(scope) != d->engine)) {
+        qWarning("QScriptValue::setScope() failed: "
+                 "cannot set a scope object created in "
+                 "a different engine");
+        return;
+    }
+    JSC::JSValue other = d->engine->scriptValueToJSCValue(scope);
+    JSC::ExecState *exec = d->engine->currentFrame;
+    JSC::Identifier id = JSC::Identifier(exec, "__qt_scope__");
+    if (!scope.isValid()) {
+        JSC::asObject(d->jscValue)->removeDirect(id);
+    } else {
+        // ### make hidden property
+        JSC::asObject(d->jscValue)->putDirect(id, other);
+    }
+}
+
+/*!
+  Returns true if this QScriptValue is an instance of
+  \a other; otherwise returns false.
+
+  This QScriptValue is considered to be an instance of \a other if
+  \a other is a function and the value of the \c{prototype}
+  property of \a other is in the prototype chain of this
+  QScriptValue.
+*/
+bool QScriptValue::instanceOf(const QScriptValue &other) const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isObject() || !other.isObject())
+        return false;
+    if (QScriptValuePrivate::getEngine(other) != d->engine) {
+        qWarning("QScriptValue::instanceof: "
+                 "cannot perform operation on a value created in "
+                 "a different engine");
+        return false;
+    }
+    JSC::JSValue jscProto = d->engine->scriptValueToJSCValue(other.property(QLatin1String("prototype")));
+    if (!jscProto)
+        jscProto = JSC::jsUndefined();
+    JSC::ExecState *exec = d->engine->currentFrame;
+    JSC::JSValue jscOther = d->engine->scriptValueToJSCValue(other);
+    return JSC::asObject(jscOther)->hasInstance(exec, d->jscValue, jscProto);
+}
+
+// ### move
+
+namespace QScript
+{
+
+enum Type {
+    Undefined,
+    Null,
+    Boolean,
+    String,
+    Number,
+    Object
+};
+
+static Type type(const QScriptValue &v)
+{
+    if (v.isUndefined())
+        return Undefined;
+    else if (v.isNull())
+        return Null;
+    else if (v.isBoolean())
+        return Boolean;
+    else if (v.isString())
+        return String;
+    else if (v.isNumber())
+        return Number;
+    Q_ASSERT(v.isObject());
+    return Object;
+}
+
+static QScriptValue ToPrimitive(const QScriptValue &object, JSC::PreferredPrimitiveType hint = JSC::NoPreference)
+{
+    Q_ASSERT(object.isObject());
+    QScriptValuePrivate *pp = QScriptValuePrivate::get(object);
+    Q_ASSERT(pp->engine != 0);
+    QScript::APIShim shim(pp->engine);
+    JSC::ExecState *exec = pp->engine->currentFrame;
+    JSC::JSValue savedException;
+    QScriptEnginePrivate::saveException(exec, &savedException);
+    JSC::JSValue result = JSC::asObject(pp->jscValue)->toPrimitive(exec, hint);
+    QScriptEnginePrivate::restoreException(exec, savedException);
+    return pp->engine->scriptValueFromJSCValue(result);
+}
+
+static bool IsNumerical(const QScriptValue &value)
+{
+    return value.isNumber() || value.isBool();
+}
+
+static bool LessThan(QScriptValue lhs, QScriptValue rhs)
+{
+    if (type(lhs) == type(rhs)) {
+        switch (type(lhs)) {
+        case Undefined:
+        case Null:
+            return false;
+
+        case Number:
+            return lhs.toNumber() < rhs.toNumber();
+
+        case Boolean:
+            return lhs.toBool() < rhs.toBool();
+
+        case String:
+            return lhs.toString() < rhs.toString();
+
+        case Object:
+            break;
+        } // switch
+    }
+
+    if (lhs.isObject())
+        lhs = ToPrimitive(lhs, JSC::PreferNumber);
+
+    if (rhs.isObject())
+        rhs = ToPrimitive(rhs, JSC::PreferNumber);
+
+    if (lhs.isString() && rhs.isString())
+        return lhs.toString() < rhs.toString();
+
+    return lhs.toNumber() < rhs.toNumber();
+}
+
+static bool Equals(QScriptValue lhs, QScriptValue rhs)
+{
+    if (type(lhs) == type(rhs)) {
+        switch (type(lhs)) {
+        case QScript::Undefined:
+        case QScript::Null:
+            return true;
+
+        case QScript::Number:
+            return lhs.toNumber() == rhs.toNumber();
+
+        case QScript::Boolean:
+            return lhs.toBool() == rhs.toBool();
+
+        case QScript::String:
+            return lhs.toString() == rhs.toString();
+
+        case QScript::Object:
+            if (lhs.isVariant())
+                return lhs.strictlyEquals(rhs) || (lhs.toVariant() == rhs.toVariant());
+#ifndef QT_NO_QOBJECT
+            else if (lhs.isQObject())
+                return (lhs.strictlyEquals(rhs)) || (lhs.toQObject() == rhs.toQObject());
+#endif
+            else
+                return lhs.strictlyEquals(rhs);
+        }
+    }
+
+    if (lhs.isNull() && rhs.isUndefined())
+        return true;
+
+    else if (lhs.isUndefined() && rhs.isNull())
+        return true;
+
+    else if (IsNumerical(lhs) && rhs.isString())
+        return lhs.toNumber() == rhs.toNumber();
+
+    else if (lhs.isString() && IsNumerical(rhs))
+        return lhs.toNumber() == rhs.toNumber();
+
+    else if (lhs.isBool())
+        return Equals(lhs.toNumber(), rhs);
+
+    else if (rhs.isBool())
+        return Equals(lhs, rhs.toNumber());
+
+    else if (lhs.isObject() && !rhs.isNull()) {
+        lhs = ToPrimitive(lhs);
+
+        if (lhs.isValid() && !lhs.isObject())
+            return Equals(lhs, rhs);
+    }
+
+    else if (rhs.isObject() && ! lhs.isNull()) {
+        rhs = ToPrimitive(rhs);
+        if (rhs.isValid() && !rhs.isObject())
+            return Equals(lhs, rhs);
+    }
+
+    return false;
+}
+
+} // namespace QScript
+
+/*!
+  Returns true if this QScriptValue is less than \a other, otherwise
+  returns false.  The comparison follows the behavior described in
+  \l{ECMA-262} section 11.8.5, "The Abstract Relational Comparison
+  Algorithm".
+
+  Note that if this QScriptValue or the \a other value are objects,
+  calling this function has side effects on the script engine, since
+  the engine will call the object's valueOf() function (and possibly
+  toString()) in an attempt to convert the object to a primitive value
+  (possibly resulting in an uncaught script exception).
+
+  \sa equals()
+*/
+bool QScriptValue::lessThan(const QScriptValue &other) const
+{
+    Q_D(const QScriptValue);
+    // no equivalent function in JSC? There's a jsLess() in VM/Machine.cpp
+    if (!isValid() || !other.isValid())
+        return false;
+    if (QScriptValuePrivate::getEngine(other) && d->engine
+        && (QScriptValuePrivate::getEngine(other) != d->engine)) {
+        qWarning("QScriptValue::lessThan: "
+                 "cannot compare to a value created in "
+                 "a different engine");
+        return false;
+    }
+    return QScript::LessThan(*this, other);
+}
+
+/*!
+  Returns true if this QScriptValue is equal to \a other, otherwise
+  returns false. The comparison follows the behavior described in
+  \l{ECMA-262} section 11.9.3, "The Abstract Equality Comparison
+  Algorithm".
+
+  This function can return true even if the type of this QScriptValue
+  is different from the type of the \a other value; i.e. the
+  comparison is not strict.  For example, comparing the number 9 to
+  the string "9" returns true; comparing an undefined value to a null
+  value returns true; comparing a \c{Number} object whose primitive
+  value is 6 to a \c{String} object whose primitive value is "6"
+  returns true; and comparing the number 1 to the boolean value
+  \c{true} returns true. If you want to perform a comparison
+  without such implicit value conversion, use strictlyEquals().
+
+  Note that if this QScriptValue or the \a other value are objects,
+  calling this function has side effects on the script engine, since
+  the engine will call the object's valueOf() function (and possibly
+  toString()) in an attempt to convert the object to a primitive value
+  (possibly resulting in an uncaught script exception).
+
+  \sa strictlyEquals(), lessThan()
+*/
+bool QScriptValue::equals(const QScriptValue &other) const
+{
+    Q_D(const QScriptValue);
+    if (!d || !other.d_ptr)
+        return (d_ptr == other.d_ptr);
+    if (QScriptValuePrivate::getEngine(other) && d->engine
+        && (QScriptValuePrivate::getEngine(other) != d->engine)) {
+        qWarning("QScriptValue::equals: "
+                 "cannot compare to a value created in "
+                 "a different engine");
+        return false;
+    }
+    if (d->isJSC() && other.d_ptr->isJSC()) {
+        QScriptEnginePrivate *eng_p = d->engine;
+        if (!eng_p)
+            eng_p = other.d_ptr->engine;
+        if (eng_p) {
+            QScript::APIShim shim(eng_p);
+            JSC::ExecState *exec = eng_p->currentFrame;
+            JSC::JSValue savedException;
+            QScriptEnginePrivate::saveException(exec, &savedException);
+            bool result = JSC::JSValue::equal(exec, d->jscValue, other.d_ptr->jscValue);
+            QScriptEnginePrivate::restoreException(exec, savedException);
+            return result;
+        }
+    }
+    return QScript::Equals(*this, other);
+}
+
+/*!
+  Returns true if this QScriptValue is equal to \a other using strict
+  comparison (no conversion), otherwise returns false. The comparison
+  follows the behavior described in \l{ECMA-262} section 11.9.6, "The
+  Strict Equality Comparison Algorithm".
+
+  If the type of this QScriptValue is different from the type of the
+  \a other value, this function returns false. If the types are equal,
+  the result depends on the type, as shown in the following table:
+
+    \table
+    \header \o Type \o Result
+    \row    \o Undefined  \o true
+    \row    \o Null       \o true
+    \row    \o Boolean    \o true if both values are true, false otherwise
+    \row    \o Number     \o false if either value is NaN (Not-a-Number); true if values are equal, false otherwise
+    \row    \o String     \o true if both values are exactly the same sequence of characters, false otherwise
+    \row    \o Object     \o true if both values refer to the same object, false otherwise
+    \endtable
+
+  \sa equals()
+*/
+bool QScriptValue::strictlyEquals(const QScriptValue &other) const
+{
+    Q_D(const QScriptValue);
+    if (!d || !other.d_ptr)
+        return (d_ptr == other.d_ptr);
+    if (QScriptValuePrivate::getEngine(other) && d->engine
+        && (QScriptValuePrivate::getEngine(other) != d->engine)) {
+        qWarning("QScriptValue::strictlyEquals: "
+                 "cannot compare to a value created in "
+                 "a different engine");
+        return false;
+    }
+
+    if (d->type != other.d_ptr->type) {
+        if (d->type == QScriptValuePrivate::JavaScriptCore) {
+            QScriptEnginePrivate *eng_p = d->engine ? d->engine : other.d_ptr->engine;
+            if (eng_p)
+                return JSC::JSValue::strictEqual(eng_p->currentFrame, d->jscValue, eng_p->scriptValueToJSCValue(other));
+        } else if (other.d_ptr->type == QScriptValuePrivate::JavaScriptCore) {
+            QScriptEnginePrivate *eng_p = other.d_ptr->engine ? other.d_ptr->engine : d->engine;
+            if (eng_p)
+                return JSC::JSValue::strictEqual(eng_p->currentFrame, eng_p->scriptValueToJSCValue(*this), other.d_ptr->jscValue);
+        }
+
+        return false;
+    }
+    switch (d->type) {
+    case QScriptValuePrivate::JavaScriptCore: {
+        QScriptEnginePrivate *eng_p = d->engine ? d->engine : other.d_ptr->engine;
+        JSC::ExecState *exec = eng_p ? eng_p->currentFrame : 0;
+        return JSC::JSValue::strictEqual(exec, d->jscValue, other.d_ptr->jscValue);
+    }
+    case QScriptValuePrivate::Number:
+        return (d->numberValue == other.d_ptr->numberValue);
+    case QScriptValuePrivate::String:
+        return (d->stringValue == other.d_ptr->stringValue);
+    }
+    return false;
+}
+
+/*!
+  Returns the string value of this QScriptValue, as defined in
+  \l{ECMA-262} section 9.8, "ToString".
+
+  Note that if this QScriptValue is an object, calling this function
+  has side effects on the script engine, since the engine will call
+  the object's toString() function (and possibly valueOf()) in an
+  attempt to convert the object to a primitive value (possibly
+  resulting in an uncaught script exception).
+
+  \sa isString()
+*/
+QString QScriptValue::toString() const
+{
+    Q_D(const QScriptValue);
+    if (!d)
+        return QString();
+    switch (d->type) {
+    case QScriptValuePrivate::JavaScriptCore: {
+        if (d->engine) {
+            QScript::APIShim shim(d->engine);
+            return QScriptEnginePrivate::toString(d->engine->currentFrame, d->jscValue);
+        } else {
+            return QScriptEnginePrivate::toString(0, d->jscValue);
+        }    }
+    case QScriptValuePrivate::Number:
+        return QScript::ToString(d->numberValue);
+    case QScriptValuePrivate::String:
+        return d->stringValue;
+    }
+    return QString();
+}
+
+/*!
+  Returns the number value of this QScriptValue, as defined in
+  \l{ECMA-262} section 9.3, "ToNumber".
+
+  Note that if this QScriptValue is an object, calling this function
+  has side effects on the script engine, since the engine will call
+  the object's valueOf() function (and possibly toString()) in an
+  attempt to convert the object to a primitive value (possibly
+  resulting in an uncaught script exception).
+
+  \sa isNumber(), toInteger(), toInt32(), toUInt32(), toUInt16()
+*/
+qsreal QScriptValue::toNumber() const
+{
+    Q_D(const QScriptValue);
+    if (!d)
+        return 0;
+    switch (d->type) {
+    case QScriptValuePrivate::JavaScriptCore: {
+        if (d->engine) {
+            QScript::APIShim shim(d->engine);
+            return QScriptEnginePrivate::toNumber(d->engine->currentFrame, d->jscValue);
+        } else {
+            return QScriptEnginePrivate::toNumber(0, d->jscValue);
+        }
+    }
+    case QScriptValuePrivate::Number:
+        return d->numberValue;
+    case QScriptValuePrivate::String:
+        return QScript::ToNumber(d->stringValue);
+    }
+    return 0;
+}
+
+/*!
+  \obsolete
+
+  Use toBool() instead.
+*/
+bool QScriptValue::toBoolean() const
+{
+    Q_D(const QScriptValue);
+    if (!d)
+        return false;
+    switch (d->type) {
+    case QScriptValuePrivate::JavaScriptCore: {
+        if (d->engine) {
+            QScript::APIShim shim(d->engine);
+            return QScriptEnginePrivate::toBool(d->engine->currentFrame, d->jscValue);
+        } else {
+            return QScriptEnginePrivate::toBool(0, d->jscValue);
+        }
+    }
+    case QScriptValuePrivate::Number:
+        return QScript::ToBool(d->numberValue);
+    case QScriptValuePrivate::String:
+        return QScript::ToBool(d->stringValue);
+    }
+    return false;
+}
+
+/*!
+  \since 4.5
+
+  Returns the boolean value of this QScriptValue, using the conversion
+  rules described in \l{ECMA-262} section 9.2, "ToBoolean".
+
+  Note that if this QScriptValue is an object, calling this function
+  has side effects on the script engine, since the engine will call
+  the object's valueOf() function (and possibly toString()) in an
+  attempt to convert the object to a primitive value (possibly
+  resulting in an uncaught script exception).
+
+  \sa isBool()
+*/
+bool QScriptValue::toBool() const
+{
+    Q_D(const QScriptValue);
+    if (!d)
+        return false;
+    switch (d->type) {
+    case QScriptValuePrivate::JavaScriptCore: {
+        if (d->engine) {
+            QScript::APIShim shim(d->engine);
+            return QScriptEnginePrivate::toBool(d->engine->currentFrame, d->jscValue);
+        } else {
+            return QScriptEnginePrivate::toBool(0, d->jscValue);
+        }
+    }
+    case QScriptValuePrivate::Number:
+        return QScript::ToBool(d->numberValue);
+    case QScriptValuePrivate::String:
+        return QScript::ToBool(d->stringValue);
+    }
+    return false;
+}
+
+/*!
+  Returns the signed 32-bit integer value of this QScriptValue, using
+  the conversion rules described in \l{ECMA-262} section 9.5, "ToInt32".
+
+  Note that if this QScriptValue is an object, calling this function
+  has side effects on the script engine, since the engine will call
+  the object's valueOf() function (and possibly toString()) in an
+  attempt to convert the object to a primitive value (possibly
+  resulting in an uncaught script exception).
+
+  \sa toNumber(), toUInt32()
+*/
+qint32 QScriptValue::toInt32() const
+{
+    Q_D(const QScriptValue);
+    if (!d)
+        return 0;
+    switch (d->type) {
+    case QScriptValuePrivate::JavaScriptCore: {
+        if (d->engine) {
+            QScript::APIShim shim(d->engine);
+            return QScriptEnginePrivate::toInt32(d->engine->currentFrame, d->jscValue);
+        } else {
+            return QScriptEnginePrivate::toInt32(0, d->jscValue);
+        }
+    }
+    case QScriptValuePrivate::Number:
+        return QScript::ToInt32(d->numberValue);
+    case QScriptValuePrivate::String:
+        return QScript::ToInt32(d->stringValue);
+    }
+    return 0;
+}
+
+/*!
+  Returns the unsigned 32-bit integer value of this QScriptValue, using
+  the conversion rules described in \l{ECMA-262} section 9.6, "ToUint32".
+
+  Note that if this QScriptValue is an object, calling this function
+  has side effects on the script engine, since the engine will call
+  the object's valueOf() function (and possibly toString()) in an
+  attempt to convert the object to a primitive value (possibly
+  resulting in an uncaught script exception).
+
+  \sa toNumber(), toInt32()
+*/
+quint32 QScriptValue::toUInt32() const
+{
+    Q_D(const QScriptValue);
+    if (!d)
+        return 0;
+    switch (d->type) {
+    case QScriptValuePrivate::JavaScriptCore: {
+        if (d->engine) {
+            QScript::APIShim shim(d->engine);
+            return QScriptEnginePrivate::toUInt32(d->engine->currentFrame, d->jscValue);
+        } else {
+            return QScriptEnginePrivate::toUInt32(0, d->jscValue);
+        }
+    }
+    case QScriptValuePrivate::Number:
+        return QScript::ToUInt32(d->numberValue);
+    case QScriptValuePrivate::String:
+        return QScript::ToUInt32(d->stringValue);
+    }
+    return 0;
+}
+
+/*!
+  Returns the unsigned 16-bit integer value of this QScriptValue, using
+  the conversion rules described in \l{ECMA-262} section 9.7, "ToUint16".
+
+  Note that if this QScriptValue is an object, calling this function
+  has side effects on the script engine, since the engine will call
+  the object's valueOf() function (and possibly toString()) in an
+  attempt to convert the object to a primitive value (possibly
+  resulting in an uncaught script exception).
+
+  \sa toNumber()
+*/
+quint16 QScriptValue::toUInt16() const
+{
+    Q_D(const QScriptValue);
+    if (!d)
+        return 0;
+    switch (d->type) {
+    case QScriptValuePrivate::JavaScriptCore: {
+        if (d->engine) {
+            QScript::APIShim shim(d->engine);
+            return QScriptEnginePrivate::toUInt16(d->engine->currentFrame, d->jscValue);
+        } else {
+            return QScriptEnginePrivate::toUInt16(0, d->jscValue);
+        }
+    }
+    case QScriptValuePrivate::Number:
+        return QScript::ToUInt16(d->numberValue);
+    case QScriptValuePrivate::String:
+        return QScript::ToUInt16(d->stringValue);
+    }
+    return 0;
+}
+
+/*!
+  Returns the integer value of this QScriptValue, using the conversion
+  rules described in \l{ECMA-262} section 9.4, "ToInteger".
+
+  Note that if this QScriptValue is an object, calling this function
+  has side effects on the script engine, since the engine will call
+  the object's valueOf() function (and possibly toString()) in an
+  attempt to convert the object to a primitive value (possibly
+  resulting in an uncaught script exception).
+
+  \sa toNumber()
+*/
+qsreal QScriptValue::toInteger() const
+{
+    Q_D(const QScriptValue);
+    if (!d)
+        return 0;
+    switch (d->type) {
+    case QScriptValuePrivate::JavaScriptCore: {
+        if (d->engine) {
+            QScript::APIShim shim(d->engine);
+            return QScriptEnginePrivate::toInteger(d->engine->currentFrame, d->jscValue);
+        } else {
+            return QScriptEnginePrivate::toInteger(0, d->jscValue);
+        }
+    }
+    case QScriptValuePrivate::Number:
+        return QScript::ToInteger(d->numberValue);
+    case QScriptValuePrivate::String:
+        return QScript::ToInteger(d->stringValue);
+    }
+    return 0;
+}
+
+/*!
+  Returns the QVariant value of this QScriptValue, if it can be
+  converted to a QVariant; otherwise returns an invalid QVariant.
+  The conversion is performed according to the following table:
+
+    \table
+    \header \o Input Type \o Result
+    \row    \o Undefined  \o An invalid QVariant.
+    \row    \o Null       \o An invalid QVariant.
+    \row    \o Boolean    \o A QVariant containing the value of the boolean.
+    \row    \o Number     \o A QVariant containing the value of the number.
+    \row    \o String     \o A QVariant containing the value of the string.
+    \row    \o QVariant Object \o The result is the QVariant value of the object (no conversion).
+    \row    \o QObject Object \o A QVariant containing a pointer to the QObject.
+    \row    \o Date Object \o A QVariant containing the date value (toDateTime()).
+    \row    \o RegExp Object \o A QVariant containing the regular expression value (toRegExp()).
+    \row    \o Array Object \o The array is converted to a QVariantList. Each element is converted to a QVariant, recursively; cyclic references are not followed.
+    \row    \o Object     \o The object is converted to a QVariantMap. Each property is converted to a QVariant, recursively; cyclic references are not followed.
+    \endtable
+
+  \sa isVariant()
+*/
+QVariant QScriptValue::toVariant() const
+{
+    Q_D(const QScriptValue);
+    if (!d)
+        return QVariant();
+    switch (d->type) {
+    case QScriptValuePrivate::JavaScriptCore: {
+        if (d->engine) {
+            QScript::APIShim shim(d->engine);
+            return QScriptEnginePrivate::toVariant(d->engine->currentFrame, d->jscValue);
+        } else {
+            return QScriptEnginePrivate::toVariant(0, d->jscValue);
+        }
+    }
+    case QScriptValuePrivate::Number:
+        return QVariant(d->numberValue);
+    case QScriptValuePrivate::String:
+        return QVariant(d->stringValue);
+    }
+    return QVariant();
+}
+
+/*!
+  \obsolete
+
+  This function is obsolete; use QScriptEngine::toObject() instead.
+*/
+QScriptValue QScriptValue::toObject() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->engine)
+        return QScriptValue();
+    return engine()->toObject(*this);
+}
+
+/*!
+  Returns a QDateTime representation of this value, in local time.
+  If this QScriptValue is not a date, or the value of the date is NaN
+  (Not-a-Number), an invalid QDateTime is returned.
+
+  \sa isDate()
+*/
+QDateTime QScriptValue::toDateTime() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->engine)
+        return QDateTime();
+    QScript::APIShim shim(d->engine);
+    return QScriptEnginePrivate::toDateTime(d->engine->currentFrame, d->jscValue);
+}
+
+#ifndef QT_NO_REGEXP
+/*!
+  Returns the QRegExp representation of this value.
+  If this QScriptValue is not a regular expression, an empty
+  QRegExp is returned.
+
+  \sa isRegExp()
+*/
+QRegExp QScriptValue::toRegExp() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->engine)
+         return QRegExp();
+    QScript::APIShim shim(d->engine);
+    return QScriptEnginePrivate::toRegExp(d->engine->currentFrame, d->jscValue);
+}
+#endif // QT_NO_REGEXP
+
+/*!
+  If this QScriptValue is a QObject, returns the QObject pointer
+  that the QScriptValue represents; otherwise, returns 0.
+
+  If the QObject that this QScriptValue wraps has been deleted,
+  this function returns 0 (i.e. it is possible for toQObject()
+  to return 0 even when isQObject() returns true).
+
+  \sa isQObject()
+*/
+QObject *QScriptValue::toQObject() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->engine)
+        return 0;
+    QScript::APIShim shim(d->engine);
+    return QScriptEnginePrivate::toQObject(d->engine->currentFrame, d->jscValue);
+}
+
+/*!
+  If this QScriptValue is a QMetaObject, returns the QMetaObject pointer
+  that the QScriptValue represents; otherwise, returns 0.
+
+  \sa isQMetaObject()
+*/
+const QMetaObject *QScriptValue::toQMetaObject() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->engine)
+        return 0;
+    QScript::APIShim shim(d->engine);
+    return QScriptEnginePrivate::toQMetaObject(d->engine->currentFrame, d->jscValue);
+}
+
+/*!
+  Sets the value of this QScriptValue's property with the given \a name to
+  the given \a value.
+
+  If this QScriptValue is not an object, this function does nothing.
+
+  If this QScriptValue does not already have a property with name \a name,
+  a new property is created; the given \a flags then specify how this
+  property may be accessed by script code.
+
+  If \a value is invalid, the property is removed.
+
+  If the property is implemented using a setter function (i.e. has the
+  PropertySetter flag set), calling setProperty() has side-effects on
+  the script engine, since the setter function will be called with the
+  given \a value as argument (possibly resulting in an uncaught script
+  exception).
+
+  Note that you cannot specify custom getter or setter functions for
+  built-in properties, such as the \c{length} property of Array objects
+  or meta properties of QObject objects.
+
+  \sa property()
+*/
+
+void QScriptValue::setProperty(const QString &name, const QScriptValue &value,
+                               const PropertyFlags &flags)
+{
+    Q_D(QScriptValue);
+    if (!d || !d->isObject())
+        return;
+    QScript::APIShim shim(d->engine);
+    QScriptEnginePrivate *valueEngine = QScriptValuePrivate::getEngine(value);
+    if (valueEngine && (valueEngine != d->engine)) {
+        qWarning("QScriptValue::setProperty(%s) failed: "
+                 "cannot set value created in a different engine",
+                 qPrintable(name));
+        return;
+    }
+    JSC::JSValue jsValue = d->engine->scriptValueToJSCValue(value);
+    d->setProperty(name, jsValue, flags);
+}
+
+/*!
+  Returns the value of this QScriptValue's property with the given \a name,
+  using the given \a mode to resolve the property.
+
+  If no such property exists, an invalid QScriptValue is returned.
+
+  If the property is implemented using a getter function (i.e. has the
+  PropertyGetter flag set), calling property() has side-effects on the
+  script engine, since the getter function will be called (possibly
+  resulting in an uncaught script exception). If an exception
+  occurred, property() returns the value that was thrown (typically
+  an \c{Error} object).
+
+  \sa setProperty(), propertyFlags(), QScriptValueIterator
+*/
+QScriptValue QScriptValue::property(const QString &name,
+                                    const ResolveFlags &mode) const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isObject())
+        return QScriptValue();
+    QScript::APIShim shim(d->engine);
+    return d->engine->scriptValueFromJSCValue(d->property(name, mode));
+}
+
+/*!
+  \overload
+
+  Returns the property at the given \a arrayIndex, using the given \a
+  mode to resolve the property.
+
+  This function is provided for convenience and performance when
+  working with array objects.
+
+  If this QScriptValue is not an Array object, this function behaves
+  as if property() was called with the string representation of \a
+  arrayIndex.
+*/
+QScriptValue QScriptValue::property(quint32 arrayIndex,
+                                    const ResolveFlags &mode) const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isObject())
+        return QScriptValue();
+    QScript::APIShim shim(d->engine);
+    return d->engine->scriptValueFromJSCValue(d->property(arrayIndex, mode));
+}
+
+/*!
+  \overload
+
+  Sets the property at the given \a arrayIndex to the given \a value.
+
+  This function is provided for convenience and performance when
+  working with array objects.
+
+  If this QScriptValue is not an Array object, this function behaves
+  as if setProperty() was called with the string representation of \a
+  arrayIndex.
+*/
+void QScriptValue::setProperty(quint32 arrayIndex, const QScriptValue &value,
+                               const PropertyFlags &flags)
+{
+    Q_D(QScriptValue);
+    if (!d || !d->isObject())
+        return;
+    if (QScriptValuePrivate::getEngine(value)
+        && (QScriptValuePrivate::getEngine(value) != d->engine)) {
+        qWarning("QScriptValue::setProperty() failed: "
+                 "cannot set value created in a different engine");
+        return;
+    }
+    QScript::APIShim shim(d->engine);
+    JSC::JSValue jsValue = d->engine->scriptValueToJSCValue(value);
+    d->setProperty(arrayIndex, jsValue, flags);
+}
+
+/*!
+  \since 4.4
+
+  Returns the value of this QScriptValue's property with the given \a name,
+  using the given \a mode to resolve the property.
+
+  This overload of property() is useful when you need to look up the
+  same property repeatedly, since the lookup can be performed faster
+  when the name is represented as an interned string.
+
+  \sa QScriptEngine::toStringHandle(), setProperty()
+*/
+QScriptValue QScriptValue::property(const QScriptString &name,
+                                    const ResolveFlags &mode) const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isObject() || !QScriptStringPrivate::isValid(name))
+        return QScriptValue();
+    QScript::APIShim shim(d->engine);
+    return d->engine->scriptValueFromJSCValue(d->property(name.d_ptr->identifier, mode));
+}
+
+/*!
+  \since 4.4
+
+  Sets the value of this QScriptValue's property with the given \a
+  name to the given \a value. The given \a flags specify how this
+  property may be accessed by script code.
+
+  This overload of setProperty() is useful when you need to set the
+  same property repeatedly, since the operation can be performed
+  faster when the name is represented as an interned string.
+
+  \sa QScriptEngine::toStringHandle()
+*/
+void QScriptValue::setProperty(const QScriptString &name,
+                               const QScriptValue &value,
+                               const PropertyFlags &flags)
+{
+    Q_D(QScriptValue);
+    if (!d || !d->isObject() || !QScriptStringPrivate::isValid(name))
+        return;
+    QScriptEnginePrivate *valueEngine = QScriptValuePrivate::getEngine(value);
+    if (valueEngine && (valueEngine != d->engine)) {
+        qWarning("QScriptValue::setProperty(%s) failed: "
+                 "cannot set value created in a different engine",
+                 qPrintable(name.toString()));
+        return;
+    }
+    QScript::APIShim shim(d->engine);
+    JSC::JSValue jsValue = d->engine->scriptValueToJSCValue(value);
+    d->setProperty(name.d_ptr->identifier, jsValue, flags);
+}
+
+/*!
+  Returns the flags of the property with the given \a name, using the
+  given \a mode to resolve the property.
+
+  \sa property()
+*/
+QScriptValue::PropertyFlags QScriptValue::propertyFlags(const QString &name,
+                                                        const ResolveFlags &mode) const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isObject())
+        return 0;
+    QScript::APIShim shim(d->engine);
+    JSC::ExecState *exec = d->engine->currentFrame;
+    return d->propertyFlags(JSC::Identifier(exec, name), mode);
+
+}
+
+/*!
+  \since 4.4
+
+  Returns the flags of the property with the given \a name, using the
+  given \a mode to resolve the property.
+
+  \sa property()
+*/
+QScriptValue::PropertyFlags QScriptValue::propertyFlags(const QScriptString &name,
+                                                        const ResolveFlags &mode) const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isObject() || !QScriptStringPrivate::isValid(name))
+        return 0;
+    return d->propertyFlags(name.d_ptr->identifier, mode);
+}
+
+/*!
+  Calls this QScriptValue as a function, using \a thisObject as
+  the `this' object in the function call, and passing \a args
+  as arguments to the function. Returns the value returned from
+  the function.
+
+  If this QScriptValue is not a function, call() does nothing
+  and returns an invalid QScriptValue.
+
+  Note that if \a thisObject is not an object, the global object
+  (see \l{QScriptEngine::globalObject()}) will be used as the
+  `this' object.
+
+  Calling call() can cause an exception to occur in the script engine;
+  in that case, call() returns the value that was thrown (typically an
+  \c{Error} object). You can call
+  QScriptEngine::hasUncaughtException() to determine if an exception
+  occurred.
+
+  \snippet doc/src/snippets/code/src_script_qscriptvalue.cpp 2
+
+  \sa construct()
+*/
+QScriptValue QScriptValue::call(const QScriptValue &thisObject,
+                                const QScriptValueList &args)
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isObject())
+        return QScriptValue();
+    QScript::APIShim shim(d->engine);
+    JSC::JSValue callee = d->jscValue;
+    JSC::CallData callData;
+    JSC::CallType callType = callee.getCallData(callData);
+    if (callType == JSC::CallTypeNone)
+        return QScriptValue();
+
+    if (QScriptValuePrivate::getEngine(thisObject)
+        && (QScriptValuePrivate::getEngine(thisObject) != d->engine)) {
+        qWarning("QScriptValue::call() failed: "
+                 "cannot call function with thisObject created in "
+                 "a different engine");
+        return QScriptValue();
+    }
+
+    JSC::ExecState *exec = d->engine->currentFrame;
+
+    JSC::JSValue jscThisObject = d->engine->scriptValueToJSCValue(thisObject);
+    if (!jscThisObject || !jscThisObject.isObject())
+        jscThisObject = d->engine->globalObject();
+
+    QVarLengthArray<JSC::JSValue, 8> argsVector(args.size());
+    for (int i = 0; i < args.size(); ++i) {
+        const QScriptValue &arg = args.at(i);
+        if (!arg.isValid()) {
+            argsVector[i] = JSC::jsUndefined();
+        } else if (QScriptValuePrivate::getEngine(arg)
+                   && (QScriptValuePrivate::getEngine(arg) != d->engine)) {
+            qWarning("QScriptValue::call() failed: "
+                     "cannot call function with argument created in "
+                     "a different engine");
+            return QScriptValue();
+        } else {
+            argsVector[i] = d->engine->scriptValueToJSCValue(arg);
+        }
+    }
+    JSC::ArgList jscArgs(argsVector.data(), argsVector.size());
+
+    JSC::JSValue savedException;
+    QScriptEnginePrivate::saveException(exec, &savedException);
+    JSC::JSValue result = JSC::call(exec, callee, callType, callData, jscThisObject, jscArgs);
+    if (exec->hadException()) {
+        result = exec->exception();
+    } else {
+        QScriptEnginePrivate::restoreException(exec, savedException);
+    }
+    return d->engine->scriptValueFromJSCValue(result);
+}
+
+/*!
+  Calls this QScriptValue as a function, using \a thisObject as
+  the `this' object in the function call, and passing \a arguments
+  as arguments to the function. Returns the value returned from
+  the function.
+
+  If this QScriptValue is not a function, call() does nothing
+  and returns an invalid QScriptValue.
+
+  \a arguments can be an arguments object, an array, null or
+  undefined; any other type will cause a TypeError to be thrown.
+
+  Note that if \a thisObject is not an object, the global object
+  (see \l{QScriptEngine::globalObject()}) will be used as the
+  `this' object.
+
+  One common usage of this function is to forward native function
+  calls to another function:
+
+  \snippet doc/src/snippets/code/src_script_qscriptvalue.cpp 3
+
+  \sa construct(), QScriptContext::argumentsObject()
+*/
+QScriptValue QScriptValue::call(const QScriptValue &thisObject,
+                                const QScriptValue &arguments)
+{
+    Q_D(QScriptValue);
+    if (!d || !d->isObject())
+        return QScriptValue();
+    QScript::APIShim shim(d->engine);
+    JSC::JSValue callee = d->jscValue;
+    JSC::CallData callData;
+    JSC::CallType callType = callee.getCallData(callData);
+    if (callType == JSC::CallTypeNone)
+        return QScriptValue();
+
+    if (QScriptValuePrivate::getEngine(thisObject)
+        && (QScriptValuePrivate::getEngine(thisObject) != d->engine)) {
+        qWarning("QScriptValue::call() failed: "
+                 "cannot call function with thisObject created in "
+                 "a different engine");
+        return QScriptValue();
+    }
+
+    JSC::ExecState *exec = d->engine->currentFrame;
+
+    JSC::JSValue jscThisObject = d->engine->scriptValueToJSCValue(thisObject);
+    if (!jscThisObject || !jscThisObject.isObject())
+        jscThisObject = d->engine->globalObject();
+
+    JSC::JSValue array = d->engine->scriptValueToJSCValue(arguments);
+    // copied from runtime/FunctionPrototype.cpp, functionProtoFuncApply()
+    JSC::MarkedArgumentBuffer applyArgs;
+    if (!array.isUndefinedOrNull()) {
+        if (!array.isObject()) {
+            return d->engine->scriptValueFromJSCValue(JSC::throwError(exec, JSC::TypeError, "Arguments must be an array"));
+        }
+        if (JSC::asObject(array)->classInfo() == &JSC::Arguments::info)
+            JSC::asArguments(array)->fillArgList(exec, applyArgs);
+        else if (JSC::isJSArray(&exec->globalData(), array))
+            JSC::asArray(array)->fillArgList(exec, applyArgs);
+        else if (JSC::asObject(array)->inherits(&JSC::JSArray::info)) {
+            unsigned length = JSC::asArray(array)->get(exec, exec->propertyNames().length).toUInt32(exec);
+            for (unsigned i = 0; i < length; ++i)
+                applyArgs.append(JSC::asArray(array)->get(exec, i));
+        } else {
+            return d->engine->scriptValueFromJSCValue(JSC::throwError(exec, JSC::TypeError, "Arguments must be an array"));
+        }
+    }
+
+    JSC::JSValue savedException;
+    QScriptEnginePrivate::saveException(exec, &savedException);
+    JSC::JSValue result = JSC::call(exec, callee, callType, callData, jscThisObject, applyArgs);
+    if (exec->hadException()) {
+        result = exec->exception();
+    } else {
+        QScriptEnginePrivate::restoreException(exec, savedException);
+    }
+    return d->engine->scriptValueFromJSCValue(result);
+}
+
+/*!
+  Creates a new \c{Object} and calls this QScriptValue as a
+  constructor, using the created object as the `this' object and
+  passing \a args as arguments. If the return value from the
+  constructor call is an object, then that object is returned;
+  otherwise the default constructed object is returned.
+
+  If this QScriptValue is not a function, construct() does nothing
+  and returns an invalid QScriptValue.
+
+  Calling construct() can cause an exception to occur in the script
+  engine; in that case, construct() returns the value that was thrown
+  (typically an \c{Error} object). You can call
+  QScriptEngine::hasUncaughtException() to determine if an exception
+  occurred.
+
+  \sa call(), QScriptEngine::newObject()
+*/
+QScriptValue QScriptValue::construct(const QScriptValueList &args)
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isObject())
+        return QScriptValue();
+    QScript::APIShim shim(d->engine);
+    JSC::JSValue callee = d->jscValue;
+    JSC::ConstructData constructData;
+    JSC::ConstructType constructType = callee.getConstructData(constructData);
+    if (constructType == JSC::ConstructTypeNone)
+        return QScriptValue();
+
+    JSC::ExecState *exec = d->engine->currentFrame;
+
+    QVarLengthArray<JSC::JSValue, 8> argsVector(args.size());
+    for (int i = 0; i < args.size(); ++i) {
+        QScriptValue arg = args.at(i);
+        if (QScriptValuePrivate::getEngine(arg) != d->engine && QScriptValuePrivate::getEngine(arg)) {
+            qWarning("QScriptValue::construct() failed: "
+                     "cannot construct function with argument created in "
+                     "a different engine");
+            return QScriptValue();
+        }
+        if (!arg.isValid())
+            argsVector[i] = JSC::jsUndefined();
+        else
+            argsVector[i] = d->engine->scriptValueToJSCValue(args.at(i));
+    }
+
+    JSC::ArgList jscArgs(argsVector.data(), argsVector.size());
+
+    JSC::JSValue savedException;
+    QScriptEnginePrivate::saveException(exec, &savedException);
+    JSC::JSValue result;
+    JSC::JSObject *newObject = JSC::construct(exec, callee, constructType, constructData, jscArgs);
+    if (exec->hadException()) {
+        result = exec->exception();
+    } else {
+        result = newObject;
+        QScriptEnginePrivate::restoreException(exec, savedException);
+    }
+    return d->engine->scriptValueFromJSCValue(result);
+}
+
+/*!
+  Creates a new \c{Object} and calls this QScriptValue as a
+  constructor, using the created object as the `this' object and
+  passing \a arguments as arguments. If the return value from the
+  constructor call is an object, then that object is returned;
+  otherwise the default constructed object is returned.
+
+  If this QScriptValue is not a function, construct() does nothing
+  and returns an invalid QScriptValue.
+
+  \a arguments can be an arguments object, an array, null or
+  undefined. Any other type will cause a TypeError to be thrown.
+
+  \sa call(), QScriptEngine::newObject(), QScriptContext::argumentsObject()
+*/
+QScriptValue QScriptValue::construct(const QScriptValue &arguments)
+{
+    Q_D(QScriptValue);
+    if (!d || !d->isObject())
+        return QScriptValue();
+    QScript::APIShim shim(d->engine);
+    JSC::JSValue callee = d->jscValue;
+    JSC::ConstructData constructData;
+    JSC::ConstructType constructType = callee.getConstructData(constructData);
+    if (constructType == JSC::ConstructTypeNone)
+        return QScriptValue();
+
+    JSC::ExecState *exec = d->engine->currentFrame;
+
+    if (QScriptValuePrivate::getEngine(arguments) != d->engine && QScriptValuePrivate::getEngine(arguments)) {
+        qWarning("QScriptValue::construct() failed: "
+                 "cannot construct function with argument created in "
+                 "a different engine");
+        return QScriptValue();
+    }
+    JSC::JSValue array = d->engine->scriptValueToJSCValue(arguments);
+    // copied from runtime/FunctionPrototype.cpp, functionProtoFuncApply()
+    JSC::MarkedArgumentBuffer applyArgs;
+    if (!array.isUndefinedOrNull()) {
+        if (!array.isObject()) {
+            return d->engine->scriptValueFromJSCValue(JSC::throwError(exec, JSC::TypeError, "Arguments must be an array"));
+        }
+        if (JSC::asObject(array)->classInfo() == &JSC::Arguments::info)
+            JSC::asArguments(array)->fillArgList(exec, applyArgs);
+        else if (JSC::isJSArray(&exec->globalData(), array))
+            JSC::asArray(array)->fillArgList(exec, applyArgs);
+        else if (JSC::asObject(array)->inherits(&JSC::JSArray::info)) {
+            unsigned length = JSC::asArray(array)->get(exec, exec->propertyNames().length).toUInt32(exec);
+            for (unsigned i = 0; i < length; ++i)
+                applyArgs.append(JSC::asArray(array)->get(exec, i));
+        } else {
+            return d->engine->scriptValueFromJSCValue(JSC::throwError(exec, JSC::TypeError, "Arguments must be an array"));
+        }
+    }
+
+    JSC::JSValue savedException;
+    QScriptEnginePrivate::saveException(exec, &savedException);
+    JSC::JSValue result;
+    JSC::JSObject *newObject = JSC::construct(exec, callee, constructType, constructData, applyArgs);
+    if (exec->hadException()) {
+        result = exec->exception();
+    } else {
+        result = newObject;
+        QScriptEnginePrivate::restoreException(exec, savedException);
+    }
+    return d->engine->scriptValueFromJSCValue(result);
+}
+
+/*!
+  Returns the QScriptEngine that created this QScriptValue,
+  or 0 if this QScriptValue is invalid or the value is not
+  associated with a particular engine.
+*/
+QScriptEngine *QScriptValue::engine() const
+{
+    Q_D(const QScriptValue);
+    if (!d)
+        return 0;
+    return QScriptEnginePrivate::get(d->engine);
+}
+
+/*!
+  \obsolete
+
+  Use isBool() instead.
+*/
+bool QScriptValue::isBoolean() const
+{
+    Q_D(const QScriptValue);
+    return d && d->isJSC() && d->jscValue.isBoolean();
+}
+
+/*!
+  \since 4.5
+
+  Returns true if this QScriptValue is of the primitive type Boolean;
+  otherwise returns false.
+
+  \sa toBool()
+*/
+bool QScriptValue::isBool() const
+{
+    Q_D(const QScriptValue);
+    return d && d->isJSC() && d->jscValue.isBoolean();
+}
+
+/*!
+  Returns true if this QScriptValue is of the primitive type Number;
+  otherwise returns false.
+
+  \sa toNumber()
+*/
+bool QScriptValue::isNumber() const
+{
+    Q_D(const QScriptValue);
+    if (!d)
+        return false;
+    switch (d->type) {
+    case QScriptValuePrivate::JavaScriptCore:
+        return d->jscValue.isNumber();
+    case QScriptValuePrivate::Number:
+        return true;
+    case QScriptValuePrivate::String:
+        return false;
+    }
+    return false;
+}
+
+/*!
+  Returns true if this QScriptValue is of the primitive type String;
+  otherwise returns false.
+
+  \sa toString()
+*/
+bool QScriptValue::isString() const
+{
+    Q_D(const QScriptValue);
+    if (!d)
+        return false;
+    switch (d->type) {
+    case QScriptValuePrivate::JavaScriptCore:
+        return d->jscValue.isString();
+    case QScriptValuePrivate::Number:
+        return false;
+    case QScriptValuePrivate::String:
+        return true;
+    }
+    return false;
+}
+
+/*!
+  Returns true if this QScriptValue is a function; otherwise returns
+  false.
+
+  \sa call()
+*/
+bool QScriptValue::isFunction() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isJSC())
+        return false;
+    return QScript::isFunction(d->jscValue);
+}
+
+/*!
+  Returns true if this QScriptValue is of the primitive type Null;
+  otherwise returns false.
+
+  \sa QScriptEngine::nullValue()
+*/
+bool QScriptValue::isNull() const
+{
+    Q_D(const QScriptValue);
+    return d && d->isJSC() && d->jscValue.isNull();
+}
+
+/*!
+  Returns true if this QScriptValue is of the primitive type Undefined;
+  otherwise returns false.
+
+  \sa QScriptEngine::undefinedValue()
+*/
+bool QScriptValue::isUndefined() const
+{
+    Q_D(const QScriptValue);
+    return d && d->isJSC() && d->jscValue.isUndefined();
+}
+
+/*!
+  Returns true if this QScriptValue is of the Object type; otherwise
+  returns false.
+
+  Note that function values, variant values, and QObject values are
+  objects, so this function returns true for such values.
+
+  \sa toObject(), QScriptEngine::newObject()
+*/
+bool QScriptValue::isObject() const
+{
+    Q_D(const QScriptValue);
+    return d && d->isObject();
+}
+
+/*!
+  Returns true if this QScriptValue is a variant value;
+  otherwise returns false.
+
+  \sa toVariant(), QScriptEngine::newVariant()
+*/
+bool QScriptValue::isVariant() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isJSC())
+        return false;
+    return QScriptEnginePrivate::isVariant(d->jscValue);
+}
+
+/*!
+  Returns true if this QScriptValue is a QObject; otherwise returns
+  false.
+
+  Note: This function returns true even if the QObject that this
+  QScriptValue wraps has been deleted.
+
+  \sa toQObject(), QScriptEngine::newQObject()
+*/
+bool QScriptValue::isQObject() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isJSC())
+        return false;
+    return QScriptEnginePrivate::isQObject(d->jscValue);
+}
+
+/*!
+  Returns true if this QScriptValue is a QMetaObject; otherwise returns
+  false.
+
+  \sa toQMetaObject(), QScriptEngine::newQMetaObject()
+*/
+bool QScriptValue::isQMetaObject() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isJSC())
+        return false;
+    return QScriptEnginePrivate::isQMetaObject(d->jscValue);
+}
+
+/*!
+  Returns true if this QScriptValue is valid; otherwise returns
+  false.
+*/
+bool QScriptValue::isValid() const
+{
+    Q_D(const QScriptValue);
+    return d && (!d->isJSC() || !!d->jscValue);
+}
+
+/*!
+  \since 4.4
+
+  Returns the internal data of this QScriptValue object. QtScript uses
+  this property to store the primitive value of Date, String, Number
+  and Boolean objects. For other types of object, custom data may be
+  stored using setData().
+*/
+QScriptValue QScriptValue::data() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isObject())
+        return QScriptValue();
+    if (d->jscValue.inherits(&QScriptObject::info)) {
+        QScriptObject *scriptObject = static_cast<QScriptObject*>(JSC::asObject(d->jscValue));
+        return d->engine->scriptValueFromJSCValue(scriptObject->data());
+    } else {
+        // ### make hidden property
+        return property(QLatin1String("__qt_data__"), QScriptValue::ResolveLocal);
+    }
+}
+
+/*!
+  \since 4.4
+
+  Sets the internal \a data of this QScriptValue object. You can use
+  this function to set object-specific data that won't be directly
+  accessible to scripts, but may be retrieved in C++ using the data()
+  function.
+
+  \sa QScriptEngine::reportAdditionalMemoryCost()
+*/
+void QScriptValue::setData(const QScriptValue &data)
+{
+    Q_D(QScriptValue);
+    if (!d || !d->isObject())
+        return;
+    QScript::APIShim shim(d->engine);
+    JSC::JSValue other = d->engine->scriptValueToJSCValue(data);
+    if (d->jscValue.inherits(&QScriptObject::info)) {
+        QScriptObject *scriptObject = static_cast<QScriptObject*>(JSC::asObject(d->jscValue));
+        scriptObject->setData(other);
+    } else {
+        JSC::ExecState *exec = d->engine->currentFrame;
+        JSC::Identifier id = JSC::Identifier(exec, "__qt_data__");
+        if (!data.isValid()) {
+            JSC::asObject(d->jscValue)->removeDirect(id);
+        } else {
+            // ### make hidden property
+            JSC::asObject(d->jscValue)->putDirect(id, other);
+        }
+    }
+}
+
+/*!
+  \since 4.4
+
+  Returns the custom script class that this script object is an
+  instance of, or 0 if the object is not of a custom class.
+
+  \sa setScriptClass()
+*/
+QScriptClass *QScriptValue::scriptClass() const
+{
+    Q_D(const QScriptValue);
+    if (!d || !d->isJSC() || !d->jscValue.inherits(&QScriptObject::info))
+        return 0;
+    QScriptObject *scriptObject = static_cast<QScriptObject*>(JSC::asObject(d->jscValue));
+    QScriptObjectDelegate *delegate = scriptObject->delegate();
+    if (!delegate || (delegate->type() != QScriptObjectDelegate::ClassObject))
+        return 0;
+    return static_cast<QScript::ClassObjectDelegate*>(delegate)->scriptClass();
+}
+
+/*!
+  \since 4.4
+
+  Sets the custom script class of this script object to \a scriptClass.
+  This can be used to "promote" a plain script object (e.g. created
+  by the "new" operator in a script, or by QScriptEngine::newObject() in C++)
+  to an object of a custom type.
+
+  If \a scriptClass is 0, the object will be demoted to a plain
+  script object.
+
+  \sa scriptClass(), setData()
+*/
+void QScriptValue::setScriptClass(QScriptClass *scriptClass)
+{
+    Q_D(QScriptValue);
+    if (!d || !d->isObject())
+        return;
+    if (!d->jscValue.inherits(&QScriptObject::info)) {
+        qWarning("QScriptValue::setScriptClass() failed: "
+                 "cannot change class of non-QScriptObject");
+        return;
+    }
+    QScriptObject *scriptObject = static_cast<QScriptObject*>(JSC::asObject(d->jscValue));
+    if (!scriptClass) {
+        scriptObject->setDelegate(0);
+    } else {
+        QScriptObjectDelegate *delegate = scriptObject->delegate();
+        if (!delegate || (delegate->type() != QScriptObjectDelegate::ClassObject)) {
+            delegate = new QScript::ClassObjectDelegate(scriptClass);
+            scriptObject->setDelegate(delegate);
+        }
+        static_cast<QScript::ClassObjectDelegate*>(delegate)->setScriptClass(scriptClass);
+    }
+}
+
+/*!
+  \internal
+
+  Returns the ID of this object, or -1 if this QScriptValue is not an
+  object.
+
+  \sa QScriptEngine::objectById()
+*/
+qint64 QScriptValue::objectId() const
+{
+    return d_ptr?d_ptr->objectId():-1;
+}
+QT_END_NAMESPACE