Long live Qt!

1 files changed, 2598 insertions, 0 deletions

diff --git a/src/script/qscriptcontext_p.cpp b/src/script/qscriptcontext_p.cpp
new file mode 100644
index 0000000000..199c9d4363
--- /dev/null
+++ b/src/script/qscriptcontext_p.cpp
@@ -0,0 +1,2598 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtScript module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore/QtDebug>
+
+#ifndef QT_NO_SCRIPT
+
+#include "qscriptcontext_p.h"
+#include "qscriptengine_p.h"
+#include "qscriptvalueimpl_p.h"
+#include "qscriptmember_p.h"
+#include "qscriptobject_p.h"
+#include "qscriptprettypretty_p.h"
+#include "qscriptast_p.h"
+#include "qscriptnodepool_p.h"
+#include "qscriptcompiler_p.h"
+#include "qscriptextenumeration_p.h"
+
+#include <math.h> // floor & friends...
+
+QT_BEGIN_NAMESPACE
+
+#define Q_SCRIPT_NO_PRINT_GENERATED_CODE
+
+#define Q_SCRIPT_NO_JOINED_FUNCTION
+
+#define CHECK_TEMPSTACK(needed) do { \
+    if (stackPtr + needed >= eng->tempStackEnd) { \
+        throwError(QLatin1String("out of memory")); \
+        HandleException(); \
+    } \
+} while (0)
+
+#ifndef Q_SCRIPT_NO_PRINT_GENERATED_CODE
+static QTextStream qout(stderr, QIODevice::WriteOnly);
+#endif
+
+static inline void qscript_uint_to_string_helper(uint i, QString &s)
+{
+    switch (i) {
+    case 0: case 1: case 2: case 3: case 4:
+    case 5: case 6: case 7: case 8: case 9:
+        s += QLatin1Char('0' + i);
+        break;
+
+    default:
+        qscript_uint_to_string_helper(i / 10, s);
+        s += QLatin1Char('0' + (i % 10));
+    }
+}
+
+static inline void qscript_uint_to_string(qsreal i, QString &s)
+{
+    if ((i < 0) || (i > 0xFFFFFFFF))
+        return; // nothing to do
+
+    qsreal x = ::fmod(i, 10);
+
+    if (x != 0.0 && x != 1.0
+            && x != 2.0 && x != 3.0
+            && x != 4.0 && x != 5.0
+            && x != 6.0 && x != 7.0
+            && x != 8.0 && x != 9.0)
+        return; // nothing to do
+
+    qscript_uint_to_string_helper(uint(i), s);
+}
+
+static inline quint32 toArrayIndex(const QScriptValueImpl &v)
+{
+    if (v.isNumber()) {
+        quint32 ui = v.toUInt32();
+        if (qsreal(ui) == v.m_number_value)
+            return ui;
+    } else if (v.isString()) {
+        QByteArray bytes = v.m_string_value->s.toUtf8();
+        char *eptr;
+        quint32 pos = strtoul(bytes.constData(), &eptr, 10);
+        if ((eptr == bytes.constData() + bytes.size())
+            && (QByteArray::number(pos) == bytes)) {
+            return pos;
+        }
+    }
+    return 0xFFFFFFFF;
+}
+
+#define CREATE_MEMBER(__obj__, __name__, __member__, __flags__) do { \
+    (__obj__).createMember(__name__, __member__, __flags__); \
+    eng->adjustBytesAllocated(sizeof(QScript::Member) + sizeof(QScriptValueImpl)); \
+} while (0)
+
+#define BEGIN_PREFIX_OPERATOR \
+    QScriptValue::ResolveFlags mode; \
+    mode = QScriptValue::ResolveFlags(stackPtr[0].m_int_value) \
+    | QScriptValue::ResolvePrototype; \
+    --stackPtr; \
+    QScriptValueImpl object = eng->toObject(stackPtr[-1]); \
+    if (!object.isObject()) { \
+        stackPtr -= 2;  \
+        throwTypeError(QLatin1String("not an object")); \
+        HandleException(); \
+    } \
+    QScriptNameIdImpl *memberName = 0; \
+    if (stackPtr[0].isString() && stackPtr[0].m_string_value->unique) \
+        memberName = stackPtr[0].m_string_value; \
+    else \
+        memberName = eng->nameId(stackPtr[0].toString(), /*persistent=*/false); \
+    QScript::Member member; \
+    QScriptValueImpl base; \
+    QScriptValueImpl value; \
+    QScriptValueImpl getter; \
+    QScriptValueImpl setter; \
+    const bool isMemberAssignment = (object.m_object_value != m_scopeChain.m_object_value); \
+    if (object.resolve(memberName, &member, &base, mode, QScript::ReadWrite)) {  \
+        base.get(member, &value); \
+        if (hasUncaughtException()) { \
+            stackPtr -= 2; \
+            HandleException(); \
+        } else if (member.isGetterOrSetter()) { \
+            if (member.isGetter()) { \
+                getter = value; \
+                if (!member.isSetter() && !base.m_object_value->findSetter(&member)) { \
+                    stackPtr -= 2; \
+                    throwError(QLatin1String("No setter defined")); \
+                    HandleException(); \
+                } \
+                base.get(member, &setter); \
+            } else { \
+                setter = value; \
+                QScript::Member tmp = member; \
+                if (!base.m_object_value->findGetter(&member)) { \
+                    stackPtr -= 2; \
+                    throwError(QLatin1String("No getter defined")); \
+                    HandleException(); \
+                } \
+                base.get(member, &getter); \
+                member = tmp; \
+            } \
+            value = getter.call(object); \
+            if (hasUncaughtException()) { \
+                stackPtr -= 2; \
+                Done(); \
+            } \
+        } \
+    } else if (!isMemberAssignment) { \
+        stackPtr -= 2; \
+        throwNotDefined(memberName); \
+        HandleException(); \
+    } else { \
+        base = object; \
+        CREATE_MEMBER(base, memberName, &member, /*flags=*/0); \
+        value = undefined; \
+    }
+
+#define END_PREFIX_OPERATOR \
+    if (member.isSetter()) { \
+        setter.call(object, QScriptValueImplList() << value); \
+        if (hasUncaughtException()) { \
+            stackPtr -= 2; \
+            Done(); \
+        } \
+    } else { \
+        if (member.isWritable()) { \
+            if (isMemberAssignment && (base.m_object_value != object.m_object_value)) { \
+                base = object; \
+                CREATE_MEMBER(base, memberName, &member, /*flags=*/0); \
+            } \
+            base.put(member, value); \
+            if (hasUncaughtException()) { \
+                stackPtr -= 2; \
+                HandleException(); \
+            } \
+        } \
+    } \
+    *--stackPtr = value; \
+    ++iPtr;
+
+#define BEGIN_INPLACE_OPERATOR \
+    if (! stackPtr[-1].isReference()) { \
+        stackPtr -= 2; \
+        throwSyntaxError(QLatin1String("invalid assignment lvalue")); \
+        HandleException(); \
+    } \
+    QScriptValue::ResolveFlags mode; \
+    mode = QScriptValue::ResolveFlags(stackPtr[-1].m_int_value) \
+           | QScriptValue::ResolvePrototype; \
+    QScriptValueImpl object = eng->toObject(stackPtr[-3]); \
+    if (! object.isValid()) { \
+        stackPtr -= 4; \
+        throwTypeError(QLatin1String("not an object")); \
+        HandleException(); \
+    } \
+    QScriptNameIdImpl *memberName = 0; \
+    if (stackPtr[-2].isString() && stackPtr[-2].m_string_value->unique) \
+        memberName = stackPtr[-2].m_string_value; \
+    else \
+        memberName = eng->nameId(stackPtr[-2].toString(), /*persistent=*/false); \
+    QScriptValueImpl lhs; \
+    QScriptValueImpl base; \
+    QScript::Member member; \
+    QScriptValueImpl getter; \
+    QScriptValueImpl setter; \
+    const bool isMemberAssignment = (object.m_object_value != m_scopeChain.m_object_value); \
+    if (object.resolve(memberName, &member, &base, mode, QScript::ReadWrite)) {  \
+        base.get(member, &lhs); \
+        if (hasUncaughtException()) { \
+            stackPtr -= 4; \
+            HandleException(); \
+        } else if (member.isGetterOrSetter()) { \
+            if (member.isGetter()) { \
+                getter = lhs; \
+                if (!member.isSetter() && !base.m_object_value->findSetter(&member)) { \
+                    stackPtr -= 4; \
+                    throwError(QLatin1String("No setter defined")); \
+                    HandleException(); \
+                } \
+                base.get(member, &setter); \
+            } else { \
+                setter = lhs; \
+                QScript::Member tmp = member; \
+                if (!base.m_object_value->findGetter(&member)) { \
+                    stackPtr -= 4; \
+                    throwError(QLatin1String("No getter defined")); \
+                    HandleException(); \
+                } \
+                base.get(member, &getter); \
+                member = tmp; \
+            } \
+            lhs = getter.call(object); \
+            if (hasUncaughtException()) { \
+                stackPtr -= 4; \
+                Done(); \
+            } \
+        } \
+    } else if (!isMemberAssignment) { \
+        stackPtr -= 4; \
+        throwNotDefined(memberName); \
+        HandleException(); \
+    } else { \
+        base = object; \
+        CREATE_MEMBER(base, memberName, &member, /*flags=*/0); \
+        lhs = undefined; \
+    } \
+    QScriptValueImpl rhs = stackPtr[0];
+
+#define END_INPLACE_OPERATOR \
+    if (member.isSetter()) { \
+        setter.call(object, QScriptValueImplList() << *stackPtr); \
+        if (hasUncaughtException()) { \
+            stackPtr -= 1; \
+            Done(); \
+        } \
+    } else { \
+        if (member.isWritable()) { \
+            if (isMemberAssignment && (base.m_object_value != object.m_object_value)) { \
+                base = object; \
+                CREATE_MEMBER(base, memberName, &member, /*flags=*/0); \
+            } \
+            base.put(member, *stackPtr); \
+            if (hasUncaughtException()) { \
+                stackPtr -= 1; \
+                HandleException(); \
+            } \
+        } \
+    } \
+    ++iPtr;
+
+namespace QScript {
+
+void ScriptFunction::execute(QScriptContextPrivate *context)
+{
+    if (! m_compiledCode) {
+        QScriptEnginePrivate *eng = context->engine();
+        Compiler compiler(eng);
+
+        CompilationUnit unit = compiler.compile(m_definition->body, formals);
+        if (! unit.isValid()) {
+            context->throwError(unit.errorMessage());
+            return;
+        }
+
+        m_compiledCode = m_astPool->createCompiledCode(m_definition->body, unit);
+    }
+
+    context->execute(m_compiledCode);
+}
+
+QString ScriptFunction::toString(QScriptContextPrivate *) const
+{
+    QString str;
+    QTextStream out(&str, QIODevice::WriteOnly);
+    PrettyPretty pp(out);
+    pp(m_definition, /*indent=*/ 0);
+    return str;
+}
+
+QString ScriptFunction::fileName() const
+{
+    return m_astPool->fileName();
+}
+
+QString ScriptFunction::functionName() const
+{
+    if (!m_definition->name)
+        return QString();
+    return m_definition->name->s;
+}
+
+int ScriptFunction::startLineNumber() const
+{
+    return m_definition->startLine;
+}
+
+int ScriptFunction::endLineNumber() const
+{
+    return m_definition->endLine;
+}
+
+} // namespace QScript
+
+/*!
+  \internal
+
+  Resolves and gets the value specified by \a stackPtr.
+  stackPtr[0] contains the member specifier, stackPtr[-1] contains the object.
+  If the member can be resolved, sets \a value to the value of that member,
+  otherwise returns false.
+*/
+bool QScriptContextPrivate::resolveField(QScriptEnginePrivate *eng,
+                                         QScriptValueImpl *stackPtr,
+                                         QScriptValueImpl *value)
+{
+    const QScriptValueImpl &m = stackPtr[0];
+    QScriptValueImpl &object = stackPtr[-1];
+
+    if (! object.isObject())
+        object = eng->toObject(object);
+
+    if (! object.isValid())
+        return false;
+
+    if (QScript::Ecma::Array::Instance *arrayInstance = eng->arrayConstructor->get(object)) {
+        quint32 pos = toArrayIndex(m);
+        if (pos != 0xFFFFFFFF) {
+            *value = arrayInstance->value.at(pos);
+
+            if (! value->isValid())
+                *value = eng->undefinedValue();
+
+            return true;
+        }
+    }
+
+    QScriptNameIdImpl *nameId = m.isString() ? m.m_string_value : 0;
+
+    if (! nameId || ! nameId->unique)
+        nameId = eng->nameId(QScriptEnginePrivate::convertToNativeString(m), /*persistent=*/false); // ### slow!
+
+    QScript::Member member;
+    QScriptValueImpl base;
+
+    if (! object.resolve(nameId, &member, &base, QScriptValue::ResolveFull, QScript::Read)) // ### ...
+        return false;
+
+    if (QScriptEnginePrivate::strictlyEquals(base, eng->m_globalObject))
+        stackPtr[-1] = base;
+    else if (object.classInfo() == eng->m_class_with)
+        stackPtr[-1] = object.prototype();
+
+    base.get(member, value);
+
+    if (member.isGetterOrSetter()) {
+        // call the getter function
+        QScriptValueImpl getter;
+        if (member.isGetter()) {
+            getter = *value;
+        } else {
+            if (!base.m_object_value->findGetter(&member)) {
+                *value = eng->undefinedValue();
+                return true;
+            }
+            base.get(member, &getter);
+        }
+        *value = getter.call(object);
+    }
+
+    return true;
+}
+
+void QScriptContextPrivate::execute(QScript::Code *code)
+{
+    int oldCurrentLine = currentLine;
+    int oldCurrentColumn = currentColumn;
+    QScript::Code *oldCode = m_code;
+    m_code = code;
+
+#ifndef Q_SCRIPT_NO_PRINT_GENERATED_CODE
+    qout << QLatin1String("function:") << endl;
+    for (QScriptInstruction *current = code->firstInstruction; current != code->lastInstruction; ++current) {
+        qout << int(current - code->firstInstruction) << QLatin1String(":\t");
+        current->print(qout);
+        qout << endl;
+    }
+    qout << endl;
+#endif
+
+    QScriptEnginePrivate *eng = engine();
+
+    bool wasEvaluating = eng->m_evaluating;
+    if (!wasEvaluating) {
+        eng->setupProcessEvents();
+        eng->resetAbortFlag();
+    }
+    eng->m_evaluating = true;
+
+    // set up the temp stack
+    if (! tempStack)
+        stackPtr = tempStack = eng->tempStackBegin;
+
+    QScriptValueImpl undefined(eng->undefinedValue());
+
+    catching = false;
+    m_state = QScriptContext::NormalState;
+    m_result = undefined;
+    firstInstruction = code->firstInstruction;
+    lastInstruction = code->lastInstruction;
+    iPtr = code->firstInstruction;
+
+    if (!m_scopeChain.isValid())
+        m_scopeChain = m_activation;
+
+#ifndef Q_SCRIPT_NO_EVENT_NOTIFY
+    eng->notifyFunctionEntry(this);
+#endif
+
+#ifndef Q_SCRIPT_DIRECT_CODE
+
+#  define I(opc) case QScriptInstruction::OP_##opc
+#  define Next() goto Lfetch
+#  define Done() goto Ldone
+#  define HandleException() goto Lhandle_exception
+#  define Abort() goto Labort
+
+Lfetch:
+
+
+#else
+
+#  define I(opc) qscript_execute_##opc
+#  define Next() goto *iPtr->code
+#  define Done() goto Ldone
+#  define HandleException() goto Lhandle_exception
+#  define Abort() goto Labort
+
+    static void * const jump_table[] = {
+
+#  define Q_SCRIPT_DEFINE_OPERATOR(op) &&I(op),
+#  include "instruction.table"
+#  undef Q_SCRIPT_DEFINE_OPERATOR
+    }; // jump_table
+
+
+    if (!code->optimized) {
+        for (QScriptInstruction *current = code->firstInstruction; current != code->lastInstruction; ++current) {
+            current->code = jump_table[current->op];
+        }
+
+        code->optimized = true;
+    }
+
+#endif
+Ltop:
+
+#ifndef Q_SCRIPT_DIRECT_CODE
+    switch (iPtr->op) {
+#else
+    goto *iPtr->code;
+#endif
+
+    I(Nop):
+    {
+        ++iPtr;
+    }   Next();
+
+    I(LoadUndefined):
+    {
+        CHECK_TEMPSTACK(1);
+        *(++stackPtr) = undefined;
+        ++iPtr;
+    }   Next();
+
+    I(LoadTrue):
+    {
+        CHECK_TEMPSTACK(1);
+        *(++stackPtr) = QScriptValueImpl(true);
+        ++iPtr;
+    }   Next();
+
+    I(LoadFalse):
+    {
+        CHECK_TEMPSTACK(1);
+        *(++stackPtr) = QScriptValueImpl(false);
+        ++iPtr;
+    }   Next();
+
+    I(LoadThis):
+    {
+        CHECK_TEMPSTACK(1);
+        Q_ASSERT(m_thisObject.isObject());
+        *++stackPtr = m_thisObject;
+        ++iPtr;
+    }   Next();
+
+    I(LoadActivation):
+    {
+        CHECK_TEMPSTACK(1);
+        *++stackPtr = m_activation;
+        ++iPtr;
+    }   Next();
+
+    I(LoadNull):
+    {
+        CHECK_TEMPSTACK(1);
+        *(++stackPtr) = eng->nullValue();
+        ++iPtr;
+    }   Next();
+
+    I(LoadNumber):
+    {
+        CHECK_TEMPSTACK(1);
+        *++stackPtr = iPtr->operand[0];
+        ++iPtr;
+    }   Next();
+
+
+    I(LoadString):
+    {
+        CHECK_TEMPSTACK(1);
+        *++stackPtr = iPtr->operand[0];
+        ++iPtr;
+    }   Next();
+
+    I(NewString):
+    {
+        CHECK_TEMPSTACK(1);
+        eng->newNameId(++stackPtr, iPtr->operand[0].m_string_value);
+        ++iPtr;
+    }   Next();
+
+    I(Duplicate):
+    {
+        CHECK_TEMPSTACK(1);
+        ++stackPtr;
+        *stackPtr = stackPtr[-1];
+        ++iPtr;
+    }   Next();
+
+    I(Swap):
+    {
+        QScriptValueImpl tmp = stackPtr[0];
+        *stackPtr = stackPtr[-1];
+        stackPtr[-1] = tmp;
+        ++iPtr;
+    }   Next();
+
+    
+    I(Receive):
+    {
+        int n = iPtr->operand[0].m_int_value;
+
+        if (n >= argc) {
+            throwError(QLatin1String("invalid argument"));
+            HandleException();
+        }
+
+        CHECK_TEMPSTACK(1);
+        *++stackPtr = argument(n);
+        ++iPtr;
+    }   Next();
+
+    I(Fetch):
+    {
+        CHECK_TEMPSTACK(1);
+
+        QScriptNameIdImpl *memberName = iPtr->operand[0].m_string_value;
+
+        QScriptValueImpl base;
+        QScript::Member member;
+
+        QScriptObject *instance = m_scopeChain.m_object_value;
+        if (instance->findMember(memberName, &member)) {
+            instance->get(member, ++stackPtr);
+            base = m_scopeChain;
+        } else {
+            if (m_scopeChain.resolve_helper(memberName, &member, &base, QScriptValue::ResolveFull, QScript::Read)) {
+                base.get(member, ++stackPtr);
+                if (hasUncaughtException()) {
+                    stackPtr -= 1;
+                    HandleException();
+                }
+            } else {
+                throwNotDefined(memberName);
+                HandleException();
+            }
+        }
+        if (member.isGetterOrSetter()) {
+            // locate the getter function
+            QScriptValueImpl getter;
+            if (member.isGetter()) {
+                getter = *stackPtr;
+            } else {
+                if (!base.m_object_value->findGetter(&member)) {
+                    stackPtr -= 1;
+                    throwError(QLatin1String("No getter defined"));
+                    HandleException();
+                }
+                base.get(member, &getter);
+            }
+            // decide the this-object. This is the object that actually
+            // has the getter (in its prototype chain).
+            QScriptValueImpl object = m_scopeChain;
+            while (!object.resolve(memberName, &member, &base, QScriptValue::ResolvePrototype, QScript::Read))
+                object = object.scope();
+            if (object.classInfo() == eng->m_class_with)
+                object = object.prototype();
+
+            *stackPtr = getter.call(object);
+            if (hasUncaughtException()) {
+                stackPtr -= 1;
+                Done();
+            }
+        }
+        ++iPtr;
+    }   Next();
+
+    I(Resolve):
+    {
+        Q_ASSERT(iPtr->operand[0].isString());
+
+        CHECK_TEMPSTACK(2);
+        *++stackPtr = m_scopeChain;
+        *++stackPtr = iPtr->operand[0];
+        eng->newReference(++stackPtr, QScriptValue::ResolveScope);
+        ++iPtr;
+    }   Next();
+
+    I(PutField):
+    {
+        Q_ASSERT(stackPtr[-1].isReference());
+
+        const QScriptValueImpl &object = stackPtr[-3];
+        QScriptNameIdImpl *memberName = stackPtr[-2].m_string_value;
+        const QScriptValueImpl &value = stackPtr[0];
+
+        QScript::Member member;
+        QScriptValueImpl base;
+
+        if (! object.resolve(memberName, &member, &base, QScriptValue::ResolveLocal, QScript::Write)) {
+            base = object;
+            CREATE_MEMBER(base, memberName, &member, /*flags=*/0);
+        }
+
+        base.put(member, value);
+        stackPtr -= 4;
+        if (hasUncaughtException())
+            HandleException();
+        ++iPtr;
+    }   Next();
+
+    I(Call):
+    {
+        int argc = iPtr->operand[0].m_int_value;
+        QScriptValueImpl *argp = stackPtr - argc;
+
+        QScriptValueImpl base;
+        QScriptValueImpl callee;
+
+        bool isReference = argp[0].isReference();
+
+        if (! isReference) { // we have a value
+            base = eng->m_globalObject;
+            callee = argp[0];
+        } else if (resolveField(eng, &argp[-1], &callee)) {
+            if (hasUncaughtException()) {
+                stackPtr = argp - 3;
+                HandleException();
+            }
+            base = argp[-2];
+        } else {
+            QScriptValueImpl member = argp[-1];
+            stackPtr = argp - 1;
+            Q_ASSERT(isReference);
+            stackPtr -= 2;
+
+            if (member.isString())
+                throwNotDefined(member.toString());
+            else
+                throwNotDefined(QLatin1String("function"));
+            HandleException();
+        }
+
+        Q_ASSERT(base.isValid());
+        Q_ASSERT(callee.isValid());
+
+        QScriptFunction *function = QScriptEnginePrivate::convertToNativeFunction(callee);
+        if (! function) {
+            QScriptValueImpl member = argp[-1];
+            QString message;
+            if (member.isString()) {
+                message = QString::fromLatin1("%0 is not a function")
+                          .arg(member.toString());
+            } else {
+                message = QLatin1String("not a function");
+            }
+            throwTypeError(message);
+            HandleException();
+        }
+
+        if (++eng->m_callDepth == eng->m_maxCallDepth) {
+            throwError(QLatin1String("call stack overflow"));
+            HandleException();
+        }
+
+        QScriptContextPrivate *nested_data = eng->pushContext();
+        nested_data->m_thisObject = base;
+        nested_data->m_callee = callee;
+
+        // create the activation
+        eng->newActivation(&nested_data->m_activation);
+        QScriptObject *activation_data = nested_data->m_activation.m_object_value;
+
+        int formalCount = function->formals.count();
+        int mx = qMax(formalCount, argc);
+        activation_data->m_members.resize(mx);
+        activation_data->m_values.resize(mx);
+        for (int i = 0; i < mx; ++i) {
+            QScriptNameIdImpl *nameId = 0;
+            if (i < formalCount)
+                nameId = function->formals.at(i);
+
+            activation_data->m_members[i].object(nameId, i,
+                                                 QScriptValue::Undeletable
+                                                 | QScriptValue::SkipInEnumeration);
+            activation_data->m_values[i] = (i < argc) ? argp[i + 1] : undefined;
+        }
+
+        nested_data->argc = argc;
+        if (callee.m_object_value->m_scope.isValid())
+            activation_data->m_scope = callee.m_object_value->m_scope;
+        else
+            activation_data->m_scope = eng->m_globalObject;
+        nested_data->tempStack = stackPtr;
+        nested_data->args = &argp[1];
+
+        function->execute(nested_data);
+
+        --eng->m_callDepth;
+
+        stackPtr = argp - 1;
+        if (isReference)
+            stackPtr -= 2;
+
+        if (nested_data->m_state == QScriptContext::ExceptionState) {
+            eng->popContext();
+            if (eng->shouldAbort())
+                Abort();
+            else
+                Done();
+        }
+
+        CHECK_TEMPSTACK(1);
+        *++stackPtr = nested_data->m_result;
+
+        eng->popContext();
+
+        if (eng->shouldAbort())
+            Abort();
+
+        if (eng->m_processEventsInterval > 0)
+            eng->processEvents();
+
+        ++iPtr;
+    }   Next();
+
+
+    I(NewArray):
+    {
+        CHECK_TEMPSTACK(1);
+        eng->arrayConstructor->newArray(++stackPtr, QScript::Array(eng));
+        ++iPtr;
+    }   Next();
+
+    I(NewRegExp):
+    {
+        CHECK_TEMPSTACK(1);
+
+        QString pattern = eng->toString(iPtr->operand[0].m_string_value);
+#ifndef QT_NO_REGEXP
+        QString literal = pattern;
+#endif
+        int flags = 0;
+        if (iPtr->operand[1].isValid()) {
+            flags = iPtr->operand[1].m_int_value;
+#ifndef QT_NO_REGEXP
+            if (flags != 0) {
+                literal += QLatin1String("/");
+                literal += QString::number(flags);
+            }
+#endif
+        }
+
+#ifndef QT_NO_REGEXP
+        QRegExp rx;
+        // lazy compilation of regexp literals
+        QHash<QString, QRegExp>::const_iterator it;
+        it = eng->m_regExpLiterals.constFind(literal);
+        if (it == eng->m_regExpLiterals.constEnd()) {
+            rx = QScript::Ecma::RegExp::toRegExp(pattern, flags);
+            eng->m_regExpLiterals.insert(literal, rx);
+        } else {
+            rx = *it;
+        }
+        eng->regexpConstructor->newRegExp(++stackPtr, rx, flags);
+#else
+        eng->regexpConstructor->newRegExp(++stackPtr, pattern, flags);
+#endif
+        ++iPtr;
+    }   Next();
+
+    I(NewObject):
+    {
+        CHECK_TEMPSTACK(1);
+        eng->objectConstructor->newObject(++stackPtr);
+        ++iPtr;
+    }   Next();
+
+    I(New):
+    {
+        int argc = iPtr->operand[0].m_int_value;
+        QScriptValueImpl *argp = stackPtr - argc;
+
+        // QScriptValueImpl base;
+        QScriptValueImpl callee;
+
+        bool isReference = argp[0].isReference();
+
+        if (! isReference) { // we have a value
+            // base = eng->globalObject;
+            callee = argp[0];
+        } else if (resolveField(eng, &argp[-1], &callee)) {
+            // base = argp[-2];
+            if (hasUncaughtException()) {
+                stackPtr = argp - 3;
+                HandleException();
+            }
+        } else {
+            QScriptValueImpl member = argp[-1];
+            stackPtr = argp - 1;
+            Q_ASSERT(isReference);
+            stackPtr -= 2;
+
+            if (member.isString())
+                throwNotDefined(member.toString());
+            else
+                throwNotDefined(QLatin1String("constructor"));
+            HandleException();
+        }
+
+        // Q_ASSERT(base.isValid());
+        Q_ASSERT(callee.isValid());
+
+        QScriptFunction *function = QScriptEnginePrivate::convertToNativeFunction(callee);
+        if (! function) {
+            QScriptValueImpl member = argp[-1];
+            QString message;
+            if (member.isString()) {
+                message = QString::fromLatin1("%0 is not a constructor")
+                          .arg(member.toString());
+            } else {
+                message = QLatin1String("not a constructor");
+            }
+            throwTypeError(message);
+            HandleException();
+        }
+
+        if (++eng->m_callDepth == eng->m_maxCallDepth) {
+            throwError(QLatin1String("call stack overflow"));
+            HandleException();
+        }
+
+        QScriptContextPrivate *nested_data = eng->pushContext();
+        nested_data->m_callee = callee;
+        nested_data->m_calledAsConstructor = true;
+
+        // create the activation
+        eng->newActivation(&nested_data->m_activation);
+        QScriptObject *activation_data = nested_data->m_activation.m_object_value;
+
+        int formalCount = function->formals.count();
+        int mx = qMax(formalCount, argc);
+        activation_data->m_members.resize(mx);
+        activation_data->m_values.resize(mx);
+        for (int i = 0; i < mx; ++i) {
+            QScriptNameIdImpl *nameId = 0;
+            if (i < formalCount)
+                nameId = function->formals.at(i);
+
+            activation_data->m_members[i].object(nameId, i,
+                                                 QScriptValue::Undeletable
+                                                 | QScriptValue::SkipInEnumeration);
+            activation_data->m_values[i] = (i < argc) ? argp[i + 1] : undefined;
+        }
+
+        eng->objectConstructor->newObject(&nested_data->m_thisObject);
+        nested_data->argc = argc;
+        if (callee.m_object_value->m_scope.isValid())
+            activation_data->m_scope = callee.m_object_value->m_scope;
+        else
+            activation_data->m_scope = eng->m_globalObject;
+        nested_data->tempStack = stackPtr;
+        nested_data->args = &argp[1];
+        nested_data->m_result = undefined;
+
+        QScriptObject *instance = nested_data->m_thisObject.m_object_value;
+
+        // set [[prototype]]
+        QScriptValueImpl dummy;
+        QScript::Member proto;
+        if (callee.resolve(eng->idTable()->id_prototype, &proto, &dummy, QScriptValue::ResolveLocal, QScript::Read))
+            callee.get(proto, &instance->m_prototype);
+        if (!instance->m_prototype.isObject())
+            instance->m_prototype = eng->objectConstructor->publicPrototype;
+
+        function->execute(nested_data);
+
+        --eng->m_callDepth;
+
+        stackPtr = argp - 1;
+        if (isReference)
+            stackPtr -= 2;
+
+        if (! nested_data->m_result.isValid())
+            nested_data->m_result = undefined;
+        else if (! nested_data->m_result.isObject())
+            nested_data->m_result = nested_data->m_thisObject;
+
+        if (nested_data->m_state == QScriptContext::ExceptionState) {
+            eng->popContext();
+            if (eng->shouldAbort())
+                Abort();
+            else
+                Done();
+        }
+
+        CHECK_TEMPSTACK(1);
+
+        *++stackPtr = nested_data->m_result;
+
+        eng->popContext();
+
+        if (eng->shouldAbort())
+            Abort();
+
+        if (eng->m_processEventsInterval > 0)
+            eng->processEvents();
+
+        ++iPtr;
+    }   Next();
+
+    I(FetchField):
+    {
+        QScriptValueImpl object = eng->toObject(stackPtr[-1]);
+        if (! object.isValid()) {
+            stackPtr -= 2;
+            throwTypeError(QLatin1String("not an object"));
+            HandleException();
+        }
+
+        QScriptValueImpl m = stackPtr[0];
+
+        QScript::Ecma::Array::Instance *arrayInstance = 0;
+        if (object.classInfo() == eng->arrayConstructor->classInfo())
+            arrayInstance = static_cast<QScript::Ecma::Array::Instance *> (object.m_object_value->m_data);
+
+        if (arrayInstance) {
+            quint32 pos = toArrayIndex(m);
+            if (pos != 0xFFFFFFFF) {
+                QScriptValueImpl val = arrayInstance->value.at(pos);
+                if (val.isValid()) {
+                    *--stackPtr = val;
+                    ++iPtr;
+                    Next();
+                }
+            }
+        }
+
+        QScriptNameIdImpl *nameId = m.isString() ? m.m_string_value : 0;
+
+        if (! nameId || ! nameId->unique) {
+            QString str;
+
+            if (m.isNumber())
+                qscript_uint_to_string(m.m_number_value, str);
+
+            if (str.isEmpty())
+                str = QScriptEnginePrivate::convertToNativeString(m);
+
+            nameId = eng->nameId(str, /*persistent=*/false);
+        }
+
+        QScript::Member member;
+        QScriptValueImpl base;
+
+        if (object.resolve(nameId, &member, &base, QScriptValue::ResolvePrototype, QScript::Read)) {
+            base.get(member, --stackPtr);
+            if (hasUncaughtException()) {
+                stackPtr -= 1;
+                HandleException();
+            } else if (member.isGetterOrSetter()) {
+                // call the getter function
+                QScriptValueImpl getter;
+                if (member.isGetter()) {
+                    getter = *stackPtr;
+                } else {
+                    if (!base.m_object_value->findGetter(&member)) {
+                        stackPtr -= 1;
+                        throwError(QLatin1String("No getter defined"));
+                        HandleException();
+                    }
+                    base.get(member, &getter);
+                }
+                *stackPtr = getter.call(object);
+                if (hasUncaughtException()) {
+                    stackPtr -= 1;
+                    Done();
+                }
+            }
+        } else {
+            *(--stackPtr) = undefined;
+        }
+
+        ++iPtr;
+    }   Next();
+
+    I(LazyArguments):
+    {
+        QScript::Member member;
+        QScriptValueImpl base;
+        QScriptNameIdImpl *arguments = eng->idTable()->id_arguments;
+        if (!m_activation.resolve(arguments, &member, &base, QScriptValue::ResolveLocal, QScript::Read)) {
+            CREATE_MEMBER(m_activation, arguments, &member, QScriptValue::Undeletable);
+            if (!m_arguments.isValid()) {
+                if (eng->strictlyEquals(m_activation, eng->globalObject()))
+                    m_arguments = undefined;
+                else
+                    eng->newArguments(&m_arguments, m_activation, argc, m_callee);
+            }
+            m_activation.put(member, m_arguments);
+        }
+        ++iPtr;
+    }   Next();
+
+    I(DeclareLocal):
+    {
+        QScriptValueImpl &act = m_activation;
+
+        QScriptNameIdImpl *memberName = iPtr->operand[0].m_string_value;
+        bool readOnly = iPtr->operand[1].m_int_value != 0;
+        QScript::Member member;
+        QScriptValueImpl object;
+
+        if (! act.resolve(memberName, &member, &object, QScriptValue::ResolveLocal, QScript::ReadWrite)) {
+            uint flags = QScriptValue::Undeletable;
+            if (readOnly)
+                flags |= QScript::Member::UninitializedConst | QScriptValue::ReadOnly;
+            CREATE_MEMBER(act, memberName, &member, flags);
+            act.put(member, undefined);
+        }
+        ++iPtr;
+    }   Next();
+
+    I(Assign):
+    {
+        if (! stackPtr[-1].isReference()) {
+            stackPtr -= 2;
+            throwSyntaxError(QLatin1String("invalid assignment lvalue"));
+            HandleException();
+        }
+
+        QScriptValue::ResolveFlags mode;
+        mode = QScriptValue::ResolveFlags(stackPtr[-1].m_int_value)
+               | QScriptValue::ResolvePrototype;
+
+        QScriptValueImpl object = eng->toObject(stackPtr[-3]);
+        if (! object.isValid()) {
+            stackPtr -= 4;
+            throwTypeError(QLatin1String("invalid assignment lvalue"));
+            HandleException();
+        }
+
+        QScriptValueImpl m = stackPtr[-2];
+        QScriptValueImpl value = stackPtr[0];
+
+        quint32 pos = 0xFFFFFFFF;
+
+        QScript::Ecma::Array::Instance *arrayInstance = eng->arrayConstructor->get(object);
+        if (arrayInstance)
+            pos = toArrayIndex(m);
+
+        stackPtr -= 3;
+
+        if (pos != 0xFFFFFFFF)
+            arrayInstance->value.assign(pos, value);
+
+        else {
+            QScriptNameIdImpl *memberName;
+
+            if (m.isString() && m.m_string_value->unique)
+                memberName = m.m_string_value;
+            else
+                memberName = eng->nameId(QScriptEnginePrivate::convertToNativeString(m), /*persistent=*/false);
+
+            QScriptValueImpl base;
+            QScript::Member member;
+
+            const bool isMemberAssignment = (object.m_object_value != m_scopeChain.m_object_value);
+            if (! object.resolve(memberName, &member, &base, mode, QScript::Write)) {
+                if (isMemberAssignment)
+                    base = object;
+                else
+                    base = eng->m_globalObject;
+
+                CREATE_MEMBER(base, memberName, &member, /*flags=*/0);
+            }
+
+            if (value.isString() && ! value.m_string_value->unique)
+                eng->newNameId(&value, value.m_string_value->s);
+
+            if (member.isGetterOrSetter()) {
+                // find and call setter(value)
+                QScriptValueImpl setter;
+                if (!member.isSetter()) {
+                    if (!base.m_object_value->findSetter(&member)) {
+                        stackPtr -= 1;
+                        throwError(QLatin1String("no setter defined"));
+                        HandleException();
+                    }
+                }
+                base.get(member, &setter);
+
+                if (!isMemberAssignment) {
+                    // decide the this-object. This is the object that actually
+                    // has the setter (in its prototype chain).
+                    while (!object.resolve(memberName, &member, &base, QScriptValue::ResolvePrototype, QScript::Write))
+                        object = object.scope();
+                    if (object.classInfo() == eng->m_class_with)
+                        object = object.prototype();
+                }
+
+                value = setter.call(object, QScriptValueImplList() << value);
+                if (hasUncaughtException()) {
+                    stackPtr -= 1;
+                    Done();
+                }
+            } else {
+                if (object.classInfo() == eng->m_class_with)
+                    object = object.prototype();
+
+                if (member.isWritable()) {
+                    if (isMemberAssignment && (base.m_object_value != object.m_object_value)) {
+                        base = object;
+                        CREATE_MEMBER(base, memberName, &member, /*flags=*/0);
+                    }
+                    base.put(member, value);
+                } else if (member.isUninitializedConst()) {
+                    base.put(member, value);
+                    if (member.isObjectProperty()) {
+                        base.m_object_value->m_members[member.id()]
+                            .unsetFlags(QScript::Member::UninitializedConst);
+                    }
+                }
+                if (hasUncaughtException()) {
+                    stackPtr -= 1;
+                    HandleException();
+                }
+            }
+        }
+
+        *stackPtr = value;
+        ++iPtr;
+    }   Next();
+
+    I(BitAnd):
+    {
+        qint32 v1 = QScriptEnginePrivate::convertToNativeInt32(stackPtr[-1]);
+        qint32 v2 = QScriptEnginePrivate::convertToNativeInt32(stackPtr[0]);
+        *(--stackPtr) = QScriptValueImpl(v1 & v2);
+        ++iPtr;
+    }   Next();
+
+    I(BitOr):
+    {
+        qint32 v1 = QScriptEnginePrivate::convertToNativeInt32(stackPtr[-1]);
+        qint32 v2 = QScriptEnginePrivate::convertToNativeInt32(stackPtr[0]);
+        *(--stackPtr) = QScriptValueImpl(v1 | v2);
+        ++iPtr;
+    }   Next();
+
+    I(BitXor):
+    {
+        qint32 v1 = QScriptEnginePrivate::convertToNativeInt32(stackPtr[-1]);
+        qint32 v2 = QScriptEnginePrivate::convertToNativeInt32(stackPtr[0]);
+        *(--stackPtr) = QScriptValueImpl(v1 ^ v2);
+        ++iPtr;
+    }   Next();
+
+    I(BitNot):
+    {
+        qint32 v1 = QScriptEnginePrivate::convertToNativeInt32(stackPtr[0]);
+        *stackPtr = QScriptValueImpl(~v1);
+        ++iPtr;
+    }   Next();
+
+    I(Not):
+    {
+        bool v1 = QScriptEnginePrivate::convertToNativeBoolean(stackPtr[0]);
+        *stackPtr = QScriptValueImpl(!v1);
+        ++iPtr;
+    }   Next();
+
+    I(LeftShift):
+    {
+        qint32 v1 = QScriptEnginePrivate::convertToNativeInt32(stackPtr[-1]);
+        qint32 v2 = QScriptEnginePrivate::convertToNativeInt32(stackPtr[0]) & 0x1f;
+        *(--stackPtr) = QScriptValueImpl(v1 << v2);
+        ++iPtr;
+    } Next();
+
+    I(Mod):
+    {
+        qsreal v1 = QScriptEnginePrivate::convertToNativeDouble(stackPtr[-1]);
+        qsreal v2 = QScriptEnginePrivate::convertToNativeDouble(stackPtr[0]);
+
+        *(--stackPtr) = QScriptValueImpl(::fmod(v1, v2));
+        ++iPtr;
+    }   Next();
+
+    I(RightShift):
+    {
+        qint32 v1 = QScriptEnginePrivate::convertToNativeInt32(stackPtr[-1]);
+        quint32 v2 = QScriptEnginePrivate::toUint32 (eng->convertToNativeDouble(stackPtr[0])) & 0x1f;
+        *(--stackPtr) = QScriptValueImpl(v1 >> v2);
+        ++iPtr;
+    }   Next();
+
+    I(URightShift):
+    {
+        quint32 v1 = QScriptEnginePrivate::toUint32 (eng->convertToNativeDouble(stackPtr[-1]));
+        qint32 v2 = QScriptEnginePrivate::convertToNativeInt32(stackPtr[0]) & 0x1f;
+        *(--stackPtr) = QScriptValueImpl(v1 >> v2);
+        ++iPtr;
+    }   Next();
+
+    I(InstanceOf):
+    {
+        QScriptValueImpl object = stackPtr[-1];
+        QScriptValueImpl ctor = stackPtr[0];
+
+        if (!ctor.isObject() || !ctor.implementsHasInstance()) {
+            stackPtr -= 2;
+            throwTypeError(QLatin1String("invalid 'instanceof' operand"));
+            HandleException();
+        }
+
+        bool result = ctor.hasInstance(object);
+        if (eng->hasUncaughtException()) {
+            stackPtr -= 2;
+            HandleException();
+        }
+
+        *(--stackPtr) = QScriptValueImpl(result);
+        ++iPtr;
+    }   Next();
+
+    I(In):
+    {
+        QScriptValueImpl object = stackPtr[0];
+        if (!object.isObject()) {
+            stackPtr -= 2;
+            throwTypeError(QLatin1String("invalid 'in' operand"));
+            HandleException();
+        }
+        QString propertyName = QScriptEnginePrivate::convertToNativeString(stackPtr[-1]);
+        bool result = object.property(propertyName, QScriptValue::ResolvePrototype).isValid(); // ### hasProperty()
+        *(--stackPtr) = QScriptValueImpl(result);
+        ++iPtr;
+    }   Next();
+
+    I(Add):
+    {
+        QScriptValueImpl lhs = eng->toPrimitive(stackPtr[-1], QScriptValueImpl::NoTypeHint);
+        QScriptValueImpl rhs = eng->toPrimitive(stackPtr[0], QScriptValueImpl::NoTypeHint);
+
+        if (lhs.isString() || rhs.isString()) {
+            QString tmp = QScriptEnginePrivate::convertToNativeString(lhs);
+            tmp += QScriptEnginePrivate::convertToNativeString(rhs);
+            eng->newString(--stackPtr, tmp);
+        } else {
+            qsreal tmp = QScriptEnginePrivate::convertToNativeDouble(lhs);
+            tmp += QScriptEnginePrivate::convertToNativeDouble(rhs);
+            *(--stackPtr) = QScriptValueImpl(tmp);
+        }
+
+        ++iPtr;
+    }   Next();
+
+    I(Div):
+    {
+        qsreal v1 = QScriptEnginePrivate::convertToNativeDouble(stackPtr[-1]);
+        qsreal v2 = QScriptEnginePrivate::convertToNativeDouble(stackPtr[0]);
+        *(--stackPtr) = QScriptValueImpl(v1 / v2);
+        ++iPtr;
+    }   Next();
+
+    I(Equal):
+    {
+        QScriptValueImpl v1 = stackPtr[-1];
+        QScriptValueImpl v2 = stackPtr[0];
+        *(--stackPtr) = QScriptValueImpl(eq_cmp(v1, v2));
+        ++iPtr;
+    }   Next();
+
+    I(GreatOrEqual):
+    {
+        QScriptValueImpl v1 = stackPtr[0];
+        QScriptValueImpl v2 = stackPtr[-1];
+        *(--stackPtr) = QScriptValueImpl(le_cmp(v1, v2));
+        ++iPtr;
+    }   Next();
+
+    I(GreatThan):
+    {
+        QScriptValueImpl v1 = stackPtr[0];
+        QScriptValueImpl v2 = stackPtr[-1];
+        *(--stackPtr) = QScriptValueImpl(lt_cmp(v1, v2));
+        ++iPtr;
+    }   Next();
+
+    I(LessOrEqual):
+    {
+        QScriptValueImpl v1 = stackPtr[-1];
+        QScriptValueImpl v2 = stackPtr[0];
+        *(--stackPtr) = QScriptValueImpl(le_cmp(v1, v2));
+        ++iPtr;
+    }   Next();
+
+    I(LessThan):
+    {
+        QScriptValueImpl v1 = stackPtr[-1];
+        QScriptValueImpl v2 = stackPtr[0];
+        *(--stackPtr) = QScriptValueImpl(lt_cmp(v1, v2));
+        ++iPtr;
+    }   Next();
+
+    I(NotEqual):
+    {
+        QScriptValueImpl v1 = stackPtr[-1];
+        QScriptValueImpl v2 = stackPtr[0];
+        *(--stackPtr) = QScriptValueImpl(!eq_cmp(v1, v2));
+        ++iPtr;
+    }   Next();
+
+    I(Mul):
+    {
+        qsreal v1 = QScriptEnginePrivate::convertToNativeDouble(stackPtr[-1]);
+        qsreal v2 = QScriptEnginePrivate::convertToNativeDouble(stackPtr[0]);
+        *(--stackPtr) = QScriptValueImpl(v1 * v2);
+        ++iPtr;
+    }   Next();
+
+    I(StrictEqual):
+    {
+        QScriptValueImpl v1 = stackPtr[-1];
+        QScriptValueImpl v2 = stackPtr[0];
+        *(--stackPtr) = strict_eq_cmp(v1, v2);
+        ++iPtr;
+    }   Next();
+
+    I(StrictNotEqual):
+    {
+        QScriptValueImpl v1 = stackPtr[-1];
+        QScriptValueImpl v2 = stackPtr[0];
+        *(--stackPtr) = ! strict_eq_cmp(v1, v2);
+        ++iPtr;
+    }   Next();
+
+    I(Sub):
+    {
+        qsreal v1 = QScriptEnginePrivate::convertToNativeDouble(stackPtr[-1]);
+        qsreal v2 = QScriptEnginePrivate::convertToNativeDouble(stackPtr[0]);
+        *(--stackPtr) = QScriptValueImpl(v1 - v2);
+        ++iPtr;
+    }   Next();
+
+    I(UnaryMinus):
+    {
+        qsreal v1 = QScriptEnginePrivate::convertToNativeDouble(*stackPtr);
+        *stackPtr = QScriptValueImpl(-v1);
+        ++iPtr;
+    }   Next();
+
+    I(UnaryPlus):
+    {
+        qsreal v1 = QScriptEnginePrivate::convertToNativeDouble(*stackPtr);
+        *stackPtr = QScriptValueImpl(+v1);
+        ++iPtr;
+    }   Next();
+
+    I(Branch):
+    {
+        eng->maybeProcessEvents();
+        if (hasUncaughtException())
+            HandleException();
+        if (eng->shouldAbort())
+            Abort();
+        iPtr += iPtr->operand[0].m_int_value;
+    }   Next();
+
+    I(BranchFalse):
+    {
+        if (! QScriptEnginePrivate::convertToNativeBoolean(*stackPtr--))
+            iPtr += iPtr->operand[0].m_int_value;
+        else
+            ++iPtr;
+    }   Next();
+
+    I(BranchTrue):
+    {
+        if (eng->convertToNativeBoolean(*stackPtr--))
+            iPtr += iPtr->operand[0].m_int_value;
+        else
+            ++iPtr;
+    }   Next();
+
+    I(NewClosure):
+    {
+        CHECK_TEMPSTACK(1);
+
+        QScript::AST::FunctionExpression *expr = static_cast<QScript::AST::FunctionExpression *> (iPtr->operand[0].m_ptr_value);
+
+#ifndef Q_SCRIPT_NO_JOINED_FUNCTION
+        if (QScript::Code *code = eng->findCode(functionBody)) {
+            QScriptValueImpl value = code->value;
+
+            if (isValid(value)) {
+                QScriptObject *instance = value.m_object_value;
+                Q_ASSERT(instance != 0);
+
+                if (instance->m_scope.m_object_value == m_scopeChain.m_object_value)
+                {
+                    *++stackPtr = value;
+                    ++iPtr;
+                    Next();
+                }
+            }
+        }
+#endif
+
+        QScript::ScriptFunction *function = new QScript::ScriptFunction(expr, code->astPool);
+
+        // update the formals
+        for (QScript::AST::FormalParameterList *it = expr->formals; it != 0; it = it->next) {
+            function->formals.append(it->name);
+        }
+        function->length = function->formals.count();
+
+        eng->functionConstructor->newFunction(++stackPtr, function);
+
+        QScriptObject *instance = stackPtr->m_object_value;
+        // initialize [[scope]]
+        instance->m_scope = m_scopeChain;
+
+        // create and initialize `prototype'
+        QScriptValueImpl proto;
+        eng->objectConstructor->newObject(&proto);
+
+        QScript::Member member;
+        CREATE_MEMBER(proto, eng->idTable()->id_constructor, &member,
+                      QScriptValue::Undeletable
+                      | QScriptValue::SkipInEnumeration);
+        proto.put(member, *stackPtr);
+
+        stackPtr->createMember(eng->idTable()->id_prototype, &member,
+                                       QScriptValue::Undeletable);
+        stackPtr->put(member, proto);
+
+        ++iPtr;
+    }   Next();
+
+    I(Incr):
+    {
+        if (! stackPtr[0].isReference()) {
+            stackPtr -= 1;
+            throwSyntaxError(QLatin1String("invalid increment operand"));
+            HandleException();
+        }
+
+        BEGIN_PREFIX_OPERATOR
+
+        qsreal x = QScriptEnginePrivate::convertToNativeDouble(value);
+        value = QScriptValueImpl(x + 1);
+
+        END_PREFIX_OPERATOR
+    }   Next();
+
+    I(Decr):
+    {
+        if (! stackPtr[0].isReference()) {
+            stackPtr -= 1;
+            throwSyntaxError(QLatin1String("invalid decrement operand"));
+            HandleException();
+        }
+
+        BEGIN_PREFIX_OPERATOR
+
+        qsreal x = QScriptEnginePrivate::convertToNativeDouble(value);
+        value = QScriptValueImpl(x - 1);
+
+        END_PREFIX_OPERATOR
+    }   Next();
+
+    I(PostIncr):
+    {
+        if (! stackPtr[0].isReference()) {
+            stackPtr -= 1;
+            throwSyntaxError(QLatin1String("invalid increment operand"));
+            HandleException();
+        }
+
+        QScriptValue::ResolveFlags mode;
+        mode = QScriptValue::ResolveFlags(stackPtr[0].m_int_value)
+               | QScriptValue::ResolvePrototype;
+
+        --stackPtr;
+
+        QScriptValueImpl object = eng->toObject(stackPtr[-1]);
+        if (!object.isObject()) {
+            stackPtr -= 2;
+            throwTypeError(QLatin1String("not an object"));
+            HandleException();
+        }
+
+        QScriptNameIdImpl *memberName = 0;
+        if (stackPtr[0].isString() && stackPtr[0].m_string_value->unique)
+            memberName = stackPtr[0].m_string_value;
+        else
+            memberName = eng->nameId(stackPtr[0].toString(), /*persistent=*/false);
+
+        QScript::Member member;
+        QScriptValueImpl base;
+        QScriptValueImpl value;
+        QScriptObject *instance = object.m_object_value;
+        const bool isMemberAssignment = (instance != m_scopeChain.m_object_value);
+        if (instance->findMember(memberName, &member)) {
+            if (!member.isGetterOrSetter()) {
+                QScriptValueImpl &r = instance->reference(member);
+                if (r.isNumber()) {
+                    *(--stackPtr) = QScriptValueImpl(r.m_number_value);
+                    r.incr();
+                    ++iPtr;
+                    Next();
+                }
+            }
+            base = object;
+        } else if (!object.resolve_helper(memberName, &member, &base, mode, QScript::ReadWrite)) {
+            if (!isMemberAssignment) {
+                stackPtr -= 2;
+                throwNotDefined(memberName);
+                HandleException();
+            }
+            base = object;
+            CREATE_MEMBER(base, memberName, &member, /*flags=*/0);
+            base.put(member, undefined);
+        }
+
+        QScriptValueImpl getter;
+        QScriptValueImpl setter;
+        base.get(member, &value);
+        if (hasUncaughtException()) {
+            stackPtr -= 2;
+            HandleException();
+        } else if (member.isGetterOrSetter()) {
+            if (member.isGetter()) {
+                getter = value;
+                if (!member.isSetter() && !base.m_object_value->findSetter(&member)) {
+                    stackPtr -= 2;
+                    throwError(QLatin1String("No setter defined"));
+                    HandleException();
+                }
+                base.get(member, &setter);
+            } else {
+                setter = value;
+                QScript::Member tmp = member;
+                if (!base.m_object_value->findGetter(&member)) {
+                    stackPtr -= 2;
+                    throwError(QLatin1String("No getter defined"));
+                    HandleException();
+                }
+                base.get(member, &getter);
+                member = tmp;
+            }
+            value = getter.call(object);
+            if (hasUncaughtException()) {
+                stackPtr -= 2;
+                Done();
+            }
+        }
+
+        qsreal x = QScriptEnginePrivate::convertToNativeDouble(value);
+
+        value = QScriptValueImpl(x + 1);
+
+        if (member.isSetter()) {
+            setter.call(object, QScriptValueImplList() << value);
+            if (hasUncaughtException()) {
+                stackPtr -= 2;
+                Done();
+            }
+        } else {
+            if (isMemberAssignment && (base.m_object_value != object.m_object_value)) {
+                base = object;
+                CREATE_MEMBER(base, memberName, &member, /*flags=*/0);
+            }
+            if (member.isWritable()) {
+                base.put(member, value);
+                if (hasUncaughtException()) {
+                    stackPtr -= 2;
+                    HandleException();
+                }
+            }
+        }
+
+        *(--stackPtr) = QScriptValueImpl(x);
+
+        ++iPtr;
+    }   Next();
+
+    I(PostDecr):
+    {
+        // ### most of the code is duplicated from PostIncr -- try to merge
+        if (! stackPtr[0].isReference()) {
+            stackPtr -= 1;
+            throwSyntaxError(QLatin1String("invalid decrement operand"));
+            HandleException();
+        }
+
+        QScriptValue::ResolveFlags mode = QScriptValue::ResolveFlags(stackPtr[0].m_int_value)
+                                          | QScriptValue::ResolvePrototype;
+
+        --stackPtr;
+
+        QScriptValueImpl object = eng->toObject(stackPtr[-1]);
+        if (!object.isObject()) {
+            stackPtr -= 2;
+            throwTypeError(QLatin1String("not an object"));
+            HandleException();
+        }
+
+        QScriptNameIdImpl *memberName = 0;
+        if (stackPtr[0].isString() && stackPtr[0].m_string_value->unique)
+            memberName = stackPtr[0].m_string_value;
+        else
+            memberName = eng->nameId(stackPtr[0].toString(), /*persistent=*/false);
+
+        QScript::Member member;
+        QScriptValueImpl base;
+        QScriptValueImpl value;
+        QScriptObject *instance = object.m_object_value;
+        const bool isMemberAssignment = (instance != m_scopeChain.m_object_value);
+        if (instance->findMember(memberName, &member)) {
+            if (!member.isGetterOrSetter()) {
+                QScriptValueImpl &r = instance->reference(member);
+                if (r.isNumber()) {
+                    *(--stackPtr) = QScriptValueImpl(r.m_number_value);
+                    r.decr();
+                    ++iPtr;
+                    Next();
+                }
+            }
+            base = object;
+        } else if (! object.resolve_helper(memberName, &member, &base, mode, QScript::ReadWrite)) {
+            if (!isMemberAssignment) {
+                stackPtr -= 2;
+                throwNotDefined(memberName);
+                HandleException();
+            }
+            base = object;
+            CREATE_MEMBER(base, memberName, &member, /*flags=*/0);
+            base.put(member, undefined);
+        }
+
+        QScriptValueImpl getter;
+        QScriptValueImpl setter;
+        base.get(member, &value);
+        if (hasUncaughtException()) {
+            stackPtr -= 2;
+            HandleException();
+        } else if (member.isGetterOrSetter()) {
+            if (member.isGetter()) {
+                getter = value;
+                if (!member.isSetter() && !base.m_object_value->findSetter(&member)) {
+                    stackPtr -= 2;
+                    throwError(QLatin1String("No setter defined"));
+                    HandleException();
+                }
+                base.get(member, &setter);
+            } else {
+                setter = value;
+                QScript::Member tmp = member;
+                if (!base.m_object_value->findGetter(&member)) {
+                    stackPtr -= 2;
+                    throwError(QLatin1String("No getter defined"));
+                    HandleException();
+                }
+                base.get(member, &getter);
+                member = tmp;
+            }
+            value = getter.call(object);
+            if (hasUncaughtException()) {
+                stackPtr -= 2;
+                Done();
+            }
+        }
+
+        qsreal x = QScriptEnginePrivate::convertToNativeDouble(value);
+
+        value = QScriptValueImpl(x - 1);
+
+        if (member.isSetter()) {
+            setter.call(object, QScriptValueImplList() << value);
+            if (hasUncaughtException()) {
+                stackPtr -= 2;
+                Done();
+            }
+        } else {
+            if (isMemberAssignment && (base.m_object_value != object.m_object_value)) {
+                base = object;
+                CREATE_MEMBER(base, memberName, &member, /*flags=*/0);
+            }
+            if (member.isWritable()) {
+                base.put(member, value);
+                if (hasUncaughtException()) {
+                    stackPtr -= 2;
+                    HandleException();
+                }
+            }
+        }
+
+        *(--stackPtr) = QScriptValueImpl(x);
+
+        ++iPtr;
+    }   Next();
+
+    I(InplaceAdd):
+    {
+        BEGIN_INPLACE_OPERATOR
+
+        lhs = eng->toPrimitive(lhs);
+        rhs = eng->toPrimitive(rhs);
+        if (lhs.isString() || rhs.isString()) {
+            if (lhs.isString() && !lhs.m_string_value->unique) {
+                lhs.m_string_value->s += QScriptEnginePrivate::convertToNativeString(rhs);
+                stackPtr -= 3;
+                *stackPtr = lhs;
+            } else {
+                QString tmp = QScriptEnginePrivate::convertToNativeString(lhs);
+                tmp += QScriptEnginePrivate::convertToNativeString(rhs);
+                stackPtr -= 3;
+                eng->newString(stackPtr, tmp);
+            }
+        } else {
+            qsreal tmp = QScriptEnginePrivate::convertToNativeDouble(lhs);
+            tmp += QScriptEnginePrivate::convertToNativeDouble(rhs);
+            stackPtr -= 3;
+            *stackPtr = QScriptValueImpl(tmp);
+        }
+
+        END_INPLACE_OPERATOR
+    }   Next();
+
+    I(InplaceSub):
+    {
+        BEGIN_INPLACE_OPERATOR
+
+        qsreal v1 = QScriptEnginePrivate::convertToNativeDouble(lhs);
+        qsreal v2 = QScriptEnginePrivate::convertToNativeDouble(rhs);
+
+        stackPtr -= 3;
+        *stackPtr = QScriptValueImpl(v1 - v2);
+
+        END_INPLACE_OPERATOR
+    }   Next();
+
+    I(InplaceAnd):
+    {
+        BEGIN_INPLACE_OPERATOR
+
+        qint32 v1 = QScriptEnginePrivate::convertToNativeInt32(lhs);
+        qint32 v2 = QScriptEnginePrivate::convertToNativeInt32(rhs);
+
+        stackPtr -= 3;
+        *stackPtr = QScriptValueImpl(v1 & v2);
+
+        END_INPLACE_OPERATOR
+    }   Next();
+
+    I(InplaceDiv):
+    {
+        BEGIN_INPLACE_OPERATOR
+
+        qsreal v1 = QScriptEnginePrivate::convertToNativeDouble(lhs);
+        qsreal v2 = QScriptEnginePrivate::convertToNativeDouble(rhs);
+
+        stackPtr -= 3;
+        *stackPtr = QScriptValueImpl(v1 / v2);
+
+        END_INPLACE_OPERATOR
+    }   Next();
+
+    I(InplaceLeftShift):
+    {
+        BEGIN_INPLACE_OPERATOR
+
+        qint32 v1 = QScriptEnginePrivate::convertToNativeInt32(lhs);
+        qint32 v2 = QScriptEnginePrivate::convertToNativeInt32(rhs);
+
+        stackPtr -= 3;
+        *stackPtr = QScriptValueImpl(v1 << v2);
+
+        END_INPLACE_OPERATOR
+    }   Next();
+
+    I(InplaceMod):
+    {
+        BEGIN_INPLACE_OPERATOR
+
+        qsreal v1 = QScriptEnginePrivate::convertToNativeDouble(lhs);
+        qsreal v2 = QScriptEnginePrivate::convertToNativeDouble(rhs);
+
+        stackPtr -= 3;
+        *stackPtr = QScriptValueImpl(::fmod (v1, v2));
+
+        END_INPLACE_OPERATOR
+    }   Next();
+
+    I(InplaceMul):
+    {
+        BEGIN_INPLACE_OPERATOR
+
+        qsreal v1 = QScriptEnginePrivate::convertToNativeDouble(lhs);
+        qsreal v2 = QScriptEnginePrivate::convertToNativeDouble(rhs);
+
+        stackPtr -= 3;
+        *stackPtr = QScriptValueImpl(v1 * v2);
+
+        END_INPLACE_OPERATOR
+    }   Next();
+
+    I(InplaceOr):
+    {
+        BEGIN_INPLACE_OPERATOR
+
+        qint32 v1 = QScriptEnginePrivate::convertToNativeInt32(lhs);
+        qint32 v2 = QScriptEnginePrivate::convertToNativeInt32(rhs);
+
+        stackPtr -= 3;
+        *stackPtr = QScriptValueImpl(v1 | v2);
+
+        END_INPLACE_OPERATOR
+    }   Next();
+
+    I(InplaceRightShift):
+    {
+        BEGIN_INPLACE_OPERATOR
+
+        qint32 v1 = QScriptEnginePrivate::convertToNativeInt32(lhs);
+        qint32 v2 = QScriptEnginePrivate::convertToNativeInt32(rhs);
+
+        stackPtr -= 3;
+        *stackPtr = QScriptValueImpl(v1 >> v2);
+
+        END_INPLACE_OPERATOR
+    }   Next();
+
+    I(InplaceURightShift):
+    {
+        BEGIN_INPLACE_OPERATOR
+
+        quint32 v1 = QScriptEnginePrivate::toUint32 (eng->convertToNativeDouble(lhs));
+        qint32 v2 = QScriptEnginePrivate::convertToNativeInt32(rhs);
+
+        stackPtr -= 3;
+        *stackPtr = QScriptValueImpl(v1 >> v2);
+
+        END_INPLACE_OPERATOR
+    }   Next();
+
+    I(InplaceXor):
+    {
+        BEGIN_INPLACE_OPERATOR
+
+        qint32 v1 = QScriptEnginePrivate::convertToNativeInt32(lhs);
+        qint32 v2 = QScriptEnginePrivate::convertToNativeInt32(rhs);
+
+        stackPtr -= 3;
+        *stackPtr = QScriptValueImpl(v1 ^ v2);
+
+        END_INPLACE_OPERATOR
+    }   Next();
+
+    I(MakeReference):
+    {
+        CHECK_TEMPSTACK(1);
+        eng->newReference(++stackPtr, QScriptValue::ResolveLocal);
+        ++iPtr;
+    }   Next();
+
+    I(TypeOf):
+    {
+        QScriptValueImpl value;
+
+        bool isReference = stackPtr[0].isReference();
+
+        if (! isReference) { // we have a value
+            value = stackPtr[0];
+        } else if (resolveField(eng, &stackPtr[-1], &value)) {
+            stackPtr -= 2;
+            if (hasUncaughtException()) {
+                stackPtr -= 1;
+                HandleException();
+            }
+        } else {
+            value = undefined;
+            stackPtr -= 2;
+        }
+
+        QString typeName;
+
+        switch (value.type()) {
+        case QScript::InvalidType:
+            typeName = QLatin1String("invalid");
+            break;
+
+        case QScript::UndefinedType:
+            typeName = QLatin1String("undefined");
+            break;
+
+        case QScript::NullType:
+            typeName = QLatin1String("object");
+            break;
+
+        case QScript::BooleanType:
+            typeName = QLatin1String("boolean");
+            break;
+
+        case QScript::IntegerType:
+        case QScript::NumberType:
+            typeName = QLatin1String("number");
+            break;
+
+        case QScript::StringType:
+        case QScript::LazyStringType:
+            typeName = QLatin1String("string");
+            break;
+
+        case QScript::ReferenceType:
+            typeName = QLatin1String("reference");
+            break;
+
+        case QScript::PointerType:
+            typeName = QLatin1String("pointer");
+            break;
+
+        case QScript::ObjectType:
+            if (value.isFunction())
+                typeName = QLatin1String("function");
+            else
+                typeName = QLatin1String("object");
+            break;
+        }
+
+        eng->newString(stackPtr, typeName);
+        ++iPtr;
+    }   Next();
+
+    I(Line):
+    {
+        eng->maybeGC();
+        eng->maybeProcessEvents();
+        if (hasUncaughtException())
+            HandleException();
+        if (eng->shouldAbort())
+            Abort();
+        currentLine = iPtr->operand[0].m_int_value;
+        currentColumn = iPtr->operand[1].m_int_value;
+#ifndef Q_SCRIPT_NO_EVENT_NOTIFY
+        if (eng->shouldNotify()) {
+            eng->notifyPositionChange(this);
+            if (hasUncaughtException())
+                HandleException();
+            if (eng->shouldAbort())
+                Abort();
+        }
+#endif
+        ++iPtr;
+    }   Next();
+
+    I(Delete):
+    {
+        bool result;
+        if (! stackPtr[0].isReference())
+            result = true;
+
+        else {
+            QScriptValueImpl object = stackPtr[-2];
+            if (!object.isObject())
+                object = eng->toObject(object);
+
+            QScriptNameIdImpl *nameId = 0;
+            if (stackPtr[-1].isString() && stackPtr[-1].m_string_value->unique) {
+                nameId = stackPtr[-1].m_string_value;
+            } else {
+                nameId = eng->nameId(QScriptEnginePrivate::convertToNativeString(stackPtr[-1]),
+                                     /*persistent=*/false);
+            }
+            if (object.classInfo() == eng->m_class_with)
+                object = object.prototype();
+            result = object.deleteProperty(nameId, QScriptValue::ResolveScope);
+            stackPtr -= 2;
+        }
+
+        *stackPtr = QScriptValueImpl(result);
+
+        ++iPtr;
+    }   Next();
+
+
+    I(NewEnumeration): {
+        QScriptValueImpl e;
+        QScriptValueImpl object = eng->toObject(stackPtr[0]);
+        eng->enumerationConstructor->newEnumeration(&e, object);
+        *stackPtr = e;
+        ++iPtr;
+    }   Next();
+
+
+    I(ToFirstElement): {
+        QScript::Ext::Enumeration::Instance *e = eng->enumerationConstructor->get(stackPtr[0]);
+        Q_ASSERT(e != 0);
+        e->toFront();
+        --stackPtr;
+        ++iPtr;
+    }   Next();
+
+
+    I(HasNextElement): {
+        QScript::Ext::Enumeration::Instance *e = eng->enumerationConstructor->get(stackPtr[0]);
+        Q_ASSERT(e != 0);
+        e->hasNext(this, stackPtr);
+        ++iPtr;
+    }   Next();
+
+
+    I(NextElement): {
+        // the Enumeration should be located below the result of I(Resolve)
+        if (! stackPtr[0].isReference()) {
+            throwTypeError(QLatin1String("QScript.VM.NextElement"));
+            HandleException();
+        }
+
+        QScript::Ext::Enumeration::Instance *e = eng->enumerationConstructor->get(stackPtr[-3]);
+        if (! e) {
+            throwTypeError(QLatin1String("QScript.VM.NextElement"));
+            HandleException();
+        }
+        e->next(this, ++stackPtr);
+        ++iPtr;
+    }   Next();
+
+
+    I(Pop):
+    {
+        --stackPtr;
+        ++iPtr;
+    }   Next();
+
+    I(Sync):
+    {
+        m_result = *stackPtr;
+        --stackPtr;
+        ++iPtr;
+    }   Next();
+
+    I(Throw):
+    {
+        Q_ASSERT(stackPtr->isValid());
+        m_result = *stackPtr--;
+        if (!m_result.isError() && !exceptionHandlerContext())
+            eng->m_exceptionBacktrace = backtrace();
+        m_state = QScriptContext::ExceptionState;
+#ifndef Q_SCRIPT_NO_EVENT_NOTIFY
+        eng->notifyException(this);
+#endif
+    }   HandleException();
+
+    I(Ret):
+    {
+        Q_ASSERT(stackPtr->isValid());
+        m_result = *stackPtr--;
+        ++iPtr;
+    }   Done();
+
+    I(Halt):
+    {
+        ++iPtr;
+    }   Done();
+
+    I(EnterWith):
+    {
+        QScriptValueImpl object = eng->toObject(*stackPtr--);
+        if (! object.isValid()) {
+            throwTypeError(QLatin1String("value has no properties"));
+            HandleException();
+        }
+        QScriptValueImpl withObject;
+        eng->newObject(&withObject, object, eng->m_class_with);
+        withObject.m_object_value->m_scope = m_scopeChain;
+        m_scopeChain = withObject;
+        ++iPtr;
+    }   Next();
+
+    I(LeaveWith):
+    {
+        QScriptValueImpl withObject = m_scopeChain;
+        m_scopeChain = withObject.m_object_value->m_scope;
+        ++iPtr;
+    }   Next();
+
+    I(BeginCatch):
+    {
+        // result contains the thrown object
+        QScriptValueImpl object;
+        eng->newObject(&object, undefined); // ### prototype
+        QScript::Member member;
+        CREATE_MEMBER(object, iPtr->operand[0].m_string_value, &member, /*flags=*/0);
+        object.put(member, m_result);
+        // make catch-object head of scopechain
+        object.m_object_value->m_scope = m_scopeChain;
+        m_scopeChain = object;
+
+        catching = true;
+        ++iPtr;
+    }   Next();
+
+    I(EndCatch):
+    {
+        // remove catch-object from scopechain
+        QScriptValueImpl object = m_scopeChain;
+        m_scopeChain = object.m_object_value->m_scope;
+
+        catching = false;
+        ++iPtr;
+    }   Next();
+
+    I(Debugger):
+    {
+#ifndef Q_SCRIPT_NO_EVENT_NOTIFY
+        eng->notifyDebugger(this);
+#endif
+        ++iPtr;
+    }   Next();
+
+#ifndef Q_SCRIPT_DIRECT_CODE
+    I(Dummy):
+    { ; }
+
+    } // end switch
+#endif
+
+Lhandle_exception:
+    errorLineNumber = currentLine;
+
+Ldone:
+    Q_ASSERT(m_result.isValid());
+
+    if (m_state == QScriptContext::ExceptionState) {
+        if (catching) {
+            // exception thrown in catch -- clean up scopechain
+            QScriptValueImpl object = m_scopeChain;
+            m_scopeChain = object.m_object_value->m_scope;
+            catching = false;
+        }
+
+        // see if we have an exception handler in this context
+        const QScriptInstruction *exPtr = findExceptionHandler(iPtr);
+        if (exPtr) {
+            if (m_scopeChain.classInfo() == eng->m_class_with) {
+                // clean up effects of with-statements if necessary
+                int withLevel = 0;
+                for (++iPtr; iPtr != exPtr; ++iPtr) {
+                    if (iPtr->op == QScriptInstruction::OP_EnterWith) {
+                        ++withLevel;
+                    } else if (iPtr->op == QScriptInstruction::OP_LeaveWith) {
+                        --withLevel;
+                        if (withLevel < 0) {
+                            QScriptValueImpl withObject = m_scopeChain;
+                            m_scopeChain = withObject.m_object_value->m_scope;
+                        }
+                    }
+                }
+            } else {
+                iPtr = exPtr;
+            }
+            // go to the handler
+            recover();
+#ifndef Q_SCRIPT_NO_EVENT_NOTIFY
+            eng->notifyExceptionCatch(this);
+#endif
+            goto Ltop;
+        } else {
+            if (!parentContext()) {
+                // pop all the top-level with-objects
+                while ((m_scopeChain.classInfo() == eng->m_class_with)
+                       && !m_scopeChain.internalValue().isValid()) {
+                    QScriptValueImpl withObject = m_scopeChain;
+                    m_scopeChain = withObject.m_object_value->m_scope;
+                }
+            }
+        }
+    }
+
+Labort:
+#ifndef Q_SCRIPT_NO_EVENT_NOTIFY
+    eng->notifyFunctionExit(this);
+#endif
+
+    eng->maybeGC();
+
+    currentLine = oldCurrentLine;
+    currentColumn = oldCurrentColumn;
+    m_code = oldCode;
+
+    eng->m_evaluating = wasEvaluating;
+}
+
+QScriptValueImpl QScriptContextPrivate::throwError(QScriptContext::Error error, const QString &text)
+{
+    QScriptEnginePrivate *eng_p = engine();
+    QScript::Ecma::Error *ctor = eng_p->errorConstructor;
+    m_result.invalidate();
+    switch (error) {
+    case QScriptContext::ReferenceError:
+        ctor->newReferenceError(&m_result, text);
+        break;
+    case QScriptContext::SyntaxError:
+        ctor->newSyntaxError(&m_result, text);
+        break;
+    case QScriptContext::TypeError:
+        ctor->newTypeError(&m_result, text);
+        break;
+    case QScriptContext::RangeError:
+        ctor->newRangeError(&m_result, text);
+        break;
+    case QScriptContext::URIError:
+        ctor->newURIError(&m_result, text);
+        break;
+    case QScriptContext::UnknownError:
+    default:
+        ctor->newError(&m_result, text);
+    }
+    setDebugInformation(&m_result);
+    m_state = QScriptContext::ExceptionState;
+#ifndef Q_SCRIPT_NO_EVENT_NOTIFY
+        eng_p->notifyException(this);
+#endif
+    return m_result;
+}
+
+#ifndef Q_SCRIPT_NO_EVENT_NOTIFY
+qint64 QScriptContextPrivate::scriptId() const
+{
+    if (!m_code)
+        return -1;
+    return m_code->astPool->id();
+}
+#endif
+
+QString QScriptContextPrivate::fileName() const
+{
+    if (!m_code)
+        return QString();
+    return m_code->astPool->fileName();
+}
+
+QString QScriptContextPrivate::functionName() const
+{
+    if (!m_callee.isValid())
+        return QString();
+    QScriptFunction *fun = m_callee.toFunction();
+    if (fun)
+        return fun->functionName();
+    return QString();
+}
+
+void QScriptContextPrivate::setDebugInformation(QScriptValueImpl *error) const
+{
+    QScriptEnginePrivate *eng_p = engine();
+    error->setProperty(QLatin1String("lineNumber"), QScriptValueImpl(currentLine));
+    if (!fileName().isEmpty())
+        error->setProperty(QLatin1String("fileName"), QScriptValueImpl(eng_p, fileName()));
+
+    const QScriptContextPrivate *ctx = this;
+    QScriptValueImpl stackArray = eng_p->newArray();
+    int i = 0;
+    while (ctx) {
+        QScriptValueImpl obj = eng_p->newObject();
+        obj.setProperty(QLatin1String("frame"), ctx->activationObject());
+        obj.setProperty(QLatin1String("lineNumber"), QScriptValueImpl(ctx->currentLine));
+        if (!ctx->fileName().isEmpty())
+            obj.setProperty(QLatin1String("fileName"), QScriptValueImpl(eng_p, ctx->fileName()));
+        if (!ctx->functionName().isEmpty())
+            obj.setProperty(QLatin1String("functionName"), QScriptValueImpl(eng_p, ctx->functionName()));
+        stackArray.setProperty(i, obj);
+        ctx = ctx->parentContext();
+        ++i;
+    }
+    error->setProperty(QLatin1String("stack"), stackArray);
+}
+
+QStringList QScriptContextPrivate::backtrace() const
+{
+    QStringList result;
+    const QScriptContextPrivate *ctx = this;
+    while (ctx) {
+        QString s;
+        QString functionName = ctx->functionName();
+        if (!functionName.isEmpty())
+            s += functionName;
+        else {
+            if (ctx->parentContext()) {
+                if (ctx->callee().isFunction()
+                    && ctx->callee().toFunction()->type() != QScriptFunction::Script) {
+                    s += QLatin1String("<native>");
+                } else {
+                    s += QLatin1String("<anonymous>");
+                }
+            } else {
+                s += QLatin1String("<global>");
+            }
+        }
+        s += QLatin1String("(");
+        for (int i = 0; i < ctx->argc; ++i) {
+            if (i > 0)
+                s += QLatin1String(",");
+            QScriptValueImpl arg = ctx->args[i];
+            if (arg.isObject())
+                s += QLatin1String("[object Object]"); // don't do a function call
+            else
+                s += arg.toString();
+        }
+        s += QLatin1String(")@");
+        s += ctx->fileName();
+        s += QString::fromLatin1(":%0").arg(ctx->currentLine);
+        result.append(s);
+        ctx = ctx->parentContext();
+    }
+    return result;
+}
+
+QScriptValueImpl QScriptContextPrivate::throwError(const QString &text)
+{
+    return throwError(QScriptContext::UnknownError, text);
+}
+
+QScriptValueImpl QScriptContextPrivate::throwNotImplemented(const QString &name)
+{
+    return throwTypeError(QString::fromUtf8("%1 is not implemented").arg(name));
+}
+
+QScriptValueImpl QScriptContextPrivate::throwNotDefined(const QString &name)
+{
+    return throwError(QScriptContext::ReferenceError,
+                      QString::fromUtf8("%1 is not defined").arg(name));
+}
+
+QScriptValueImpl QScriptContextPrivate::throwNotDefined(QScriptNameIdImpl *nameId)
+{
+    return throwNotDefined(QScriptEnginePrivate::toString(nameId));
+}
+
+bool QScriptContextPrivate::eq_cmp_helper(QScriptValueImpl lhs, QScriptValueImpl rhs)
+{
+    if (lhs.isNull() && rhs.isUndefined())
+        return true;
+
+    else if (lhs.isUndefined() && rhs.isNull())
+        return true;
+
+    else if (isNumerical(lhs) && rhs.isString())
+        return QScriptEnginePrivate::convertToNativeDouble(lhs) == QScriptEnginePrivate::convertToNativeDouble(rhs);
+
+    else if (lhs.isString() && isNumerical(rhs))
+        return QScriptEnginePrivate::convertToNativeDouble(lhs) == QScriptEnginePrivate::convertToNativeDouble(rhs);
+
+    else if (lhs.isBoolean())
+        return eq_cmp(QScriptValueImpl(QScriptEnginePrivate::convertToNativeDouble(lhs)), rhs);
+
+    else if (rhs.isBoolean())
+        return eq_cmp(lhs, QScriptValueImpl(QScriptEnginePrivate::convertToNativeDouble(rhs)));
+
+    else if (lhs.isObject() && ! rhs.isNull()) {
+        lhs = lhs.engine()->toPrimitive(lhs);
+
+        if (lhs.isValid() && ! lhs.isObject())
+            return eq_cmp(lhs, rhs);
+    }
+
+    else if (rhs.isObject() && ! lhs.isNull()) {
+        rhs = rhs.engine()->toPrimitive(rhs);
+
+        if (rhs.isValid() && ! rhs.isObject())
+            return eq_cmp(lhs, rhs);
+    }
+
+    return false;
+}
+
+#if defined(Q_CC_GNU) && __GNUC__ <= 3
+bool QScriptContextPrivate::lt_cmp(QScriptValueImpl lhs, QScriptValueImpl rhs)
+{
+    if (lhs.type() == rhs.type()) {
+        switch (lhs.type()) {
+        case QScript::InvalidType:
+        case QScript::UndefinedType:
+        case QScript::NullType:
+            return false;
+
+        case QScript::NumberType:
+            return lhs.m_number_value < rhs.m_number_value;
+
+        case QScript::IntegerType:
+            return lhs.m_int_value < rhs.m_int_value;
+
+        case QScript::BooleanType:
+            return lhs.m_bool_value < rhs.m_bool_value;
+
+        default:
+            break;
+        } // switch
+    }
+#else
+bool QScriptContextPrivate::lt_cmp_helper(QScriptValueImpl lhs, QScriptValueImpl rhs)
+{
+#endif
+    if ((lhs.type() == rhs.type()) && (lhs.type() == QScript::StringType))
+        return lhs.m_string_value->s < rhs.m_string_value->s;
+
+    if (lhs.isObject())
+        lhs = lhs.engine()->toPrimitive(lhs, QScriptValueImpl::NumberTypeHint);
+
+    if (rhs.isObject())
+        rhs = rhs.engine()->toPrimitive(rhs, QScriptValueImpl::NumberTypeHint);
+
+    if (lhs.isString() && rhs.isString())
+        return QScriptEnginePrivate::convertToNativeString(lhs) < QScriptEnginePrivate::convertToNativeString(rhs);
+
+    qsreal n1 = QScriptEnginePrivate::convertToNativeDouble(lhs);
+    qsreal n2 = QScriptEnginePrivate::convertToNativeDouble(rhs);
+#if defined Q_CC_MSVC && !defined Q_CC_MSVC_NET
+    if (qIsNaN(n1) || qIsNaN(n2))
+        return false;
+#endif
+    return n1 < n2;
+}
+
+bool QScriptContextPrivate::le_cmp_helper(QScriptValueImpl lhs, QScriptValueImpl rhs)
+{
+    if ((lhs.type() == rhs.type()) && (lhs.type() == QScript::StringType))
+        return lhs.m_string_value->s <= rhs.m_string_value->s;
+
+    if (lhs.isObject())
+        lhs = lhs.engine()->toPrimitive(lhs, QScriptValueImpl::NumberTypeHint);
+
+    if (rhs.isObject())
+        rhs = rhs.engine()->toPrimitive(rhs, QScriptValueImpl::NumberTypeHint);
+
+    if (lhs.isString() && rhs.isString())
+        return QScriptEnginePrivate::convertToNativeString(lhs) <= QScriptEnginePrivate::convertToNativeString(rhs);
+
+    qsreal n1 = QScriptEnginePrivate::convertToNativeDouble(lhs);
+    qsreal n2 = QScriptEnginePrivate::convertToNativeDouble(rhs);
+    return n1 <= n2;
+}
+
+const QScriptInstruction *QScriptContextPrivate::findExceptionHandler(
+    const QScriptInstruction *ip) const
+{
+    Q_ASSERT(m_code);
+    int offset = ip - m_code->firstInstruction;
+    for (int i = 0; i < m_code->exceptionHandlers.count(); ++i) {
+        QScript::ExceptionHandlerDescriptor e = m_code->exceptionHandlers.at(i);
+        if (offset >= e.startInstruction() && offset <= e.endInstruction()) {
+            return m_code->firstInstruction + e.handlerInstruction();
+        }
+    }
+    return 0;
+}
+
+const QScriptInstruction *QScriptContextPrivate::findExceptionHandlerRecursive(
+    const QScriptInstruction *ip, QScriptContextPrivate **handlerContext) const
+{
+    const QScriptContextPrivate *ctx = this;
+    const QScriptInstruction *iip = ip;
+    while (ctx) {
+        if (ctx->m_code) {
+            const QScriptInstruction *ep = ctx->findExceptionHandler(iip);
+            if (ep) {
+                Q_ASSERT(handlerContext);
+                *handlerContext = const_cast<QScriptContextPrivate*>(ctx);
+                return ep;
+            }
+        }
+        ctx = ctx->parentContext();
+        if (ctx)
+            iip = ctx->iPtr;
+    }
+    return 0;
+}
+
+/*!
+  Requires that iPtr in current context is in sync
+*/
+QScriptContextPrivate *QScriptContextPrivate::exceptionHandlerContext() const
+{
+    QScriptContextPrivate *handlerContext;
+    if (findExceptionHandlerRecursive(iPtr, &handlerContext))
+        return handlerContext;
+    return 0;
+}
+
+QScriptContext *QScriptContextPrivate::get(QScriptContextPrivate *d)
+{
+    if (d)
+        return d->q_func();
+    return 0;
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_SCRIPT