summaryrefslogtreecommitdiffstats
path: root/src/script/api/qscriptengine_p.h
blob: e36593e7caba103a5b2fd53a191796ba59caef7f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
/****************************************************************************
**
** Copyright (C) 2012 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.
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QSCRIPTENGINE_P_H
#define QSCRIPTENGINE_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "private/qobject_p.h"

#include <QtCore/qdatetime.h>
#include <QtCore/qhash.h>
#include <QtCore/qnumeric.h>
#include <QtCore/qregexp.h>
#include <QtCore/qset.h>
#include "qscriptvalue_p.h"
#include "qscriptstring_p.h"
#include "bridge/qscriptclassobject_p.h"
#include "bridge/qscriptdeclarativeclass_p.h"
#include "bridge/qscriptdeclarativeobject_p.h"
#include "bridge/qscriptobject_p.h"
#include "bridge/qscriptqobject_p.h"
#include "bridge/qscriptvariant_p.h"

#include "DateConstructor.h"
#include "DateInstance.h"
#include "Debugger.h"
#include "ErrorInstance.h"
#include "JSArray.h"
#include "Executable.h"
#include "Lexer.h"
#include "RefPtr.h"
#include "RegExpConstructor.h"
#include "RegExpObject.h"
#include "SourceProvider.h"
#include "Structure.h"
#include "UString.h"
#include "JSGlobalObject.h"
#include "JSValue.h"

namespace JSC
{
    class EvalExecutable;
    class ExecState;
    typedef ExecState CallFrame;
    class JSCell;
    class JSGlobalObject;
}


QT_BEGIN_NAMESPACE

class QString;
class QStringList;
class QScriptContext;
class QScriptValue;
class QScriptTypeInfo;
class QScriptEngineAgent;
class QScriptEnginePrivate;
class QScriptSyntaxCheckResult;
class QScriptEngine;
class QScriptProgramPrivate;

namespace QScript
{
    class QObjectPrototype;
    class QMetaObjectPrototype;
    class QVariantPrototype;
#ifndef QT_NO_QOBJECT
    class QObjectData;
#endif
    class TimeoutCheckerProxy;

    qint32 ToInt32(qsreal);
    quint32 ToUInt32(qsreal);
    quint16 ToUInt16(qsreal);
    qsreal ToInteger(qsreal);

    inline bool ToBool(qsreal);
    inline bool ToBool(const QString &);
    inline qint32 ToInt32(const QString &);
    inline quint32 ToUInt32(const QString &);
    inline quint16 ToUInt16(const QString &);
    inline qsreal ToInteger(const QString &);
#ifdef Q_CC_MSVC
    // MSVC2008 crashes if these are inlined.
    qsreal ToNumber(const QString &);
    QString ToString(qsreal);
#else
    inline qsreal ToNumber(const QString &);
    inline QString ToString(qsreal);
#endif

    QDateTime MsToDateTime(JSC::ExecState *, qsreal);
    qsreal DateTimeToMs(JSC::ExecState *, const QDateTime &);

    //some conversion helper functions
    inline QScriptEnginePrivate *scriptEngineFromExec(const JSC::ExecState *exec);
    bool isFunction(JSC::JSValue value);

    inline void convertToLatin1_helper(const UChar *i, int length, char *s);
    inline QByteArray convertToLatin1(const JSC::UString &str);

    class UStringSourceProviderWithFeedback;

struct GlobalClientData : public JSC::JSGlobalData::ClientData
{
    GlobalClientData(QScriptEnginePrivate *e)
        : engine(e) {}
    virtual ~GlobalClientData() {}
    virtual void mark(JSC::MarkStack& markStack);

    QScriptEnginePrivate *engine;
};

} // namespace QScript

class QScriptEnginePrivate
#ifndef QT_NO_QOBJECT
    : public QObjectPrivate
#endif
{
    Q_DECLARE_PUBLIC(QScriptEngine)
public:
    QScriptEnginePrivate();
    virtual ~QScriptEnginePrivate();

    static QScriptEnginePrivate *get(QScriptEngine *q) { return q ? q->d_func() : 0; }
    static QScriptEngine *get(QScriptEnginePrivate *d) { return d ? d->q_func() : 0; }

    static inline bool isArray(JSC::JSValue);
    static inline bool isDate(JSC::JSValue);
    static inline bool isError(JSC::JSValue);
    static inline bool isObject(JSC::JSValue);
    static inline bool isRegExp(JSC::JSValue);
    static inline bool isVariant(JSC::JSValue);
    static inline bool isQObject(JSC::JSValue);
    static inline bool isQMetaObject(JSC::JSValue);

    static inline bool toBool(JSC::ExecState *, JSC::JSValue);
    static inline qsreal toInteger(JSC::ExecState *, JSC::JSValue);
    static inline qsreal toNumber(JSC::ExecState *, JSC::JSValue);
    static inline qint32 toInt32(JSC::ExecState *, JSC::JSValue);
    static inline quint32 toUInt32(JSC::ExecState *, JSC::JSValue);
    static inline quint16 toUInt16(JSC::ExecState *, JSC::JSValue);
    static inline JSC::UString toString(JSC::ExecState *, JSC::JSValue);

    static inline QDateTime toDateTime(JSC::ExecState *, JSC::JSValue);
#ifndef QT_NO_REGEXP
    static QRegExp toRegExp(JSC::ExecState*, JSC::JSValue);
#endif
    static QVariant toVariant(JSC::ExecState *, JSC::JSValue);
    static inline QObject *toQObject(JSC::ExecState *, JSC::JSValue);
    static inline const QMetaObject *toQMetaObject(JSC::ExecState *, JSC::JSValue);

    static inline JSC::JSValue property(JSC::ExecState*, JSC::JSValue, const JSC::Identifier &id,
                                 int resolveMode = QScriptValue::ResolvePrototype);
    static JSC::JSValue propertyHelper(JSC::ExecState*, JSC::JSValue, const JSC::Identifier &id, int resolveMode);
    static inline JSC::JSValue property(JSC::ExecState*, JSC::JSValue, quint32 index,
                                 int resolveMode = QScriptValue::ResolvePrototype);
    static JSC::JSValue propertyHelper(JSC::ExecState*, JSC::JSValue, quint32, int resolveMode);
    static inline JSC::JSValue property(JSC::ExecState*, JSC::JSValue, const JSC::UString &, int resolveMode);
    static inline void setProperty(JSC::ExecState*, JSC::JSValue object, const JSC::UString &name, JSC::JSValue,
                     const QScriptValue::PropertyFlags &flags = QScriptValue::KeepExistingFlags);
    static void setProperty(JSC::ExecState*, JSC::JSValue object, const JSC::Identifier &id, JSC::JSValue,
                     const QScriptValue::PropertyFlags &flags = QScriptValue::KeepExistingFlags);
    static void setProperty(JSC::ExecState*, JSC::JSValue object, quint32 index, JSC::JSValue,
                     const QScriptValue::PropertyFlags &flags = QScriptValue::KeepExistingFlags);
    static QScriptValue::PropertyFlags propertyFlags(JSC::ExecState*, JSC::JSValue value,
                                              const JSC::Identifier &id, const QScriptValue::ResolveFlags &mode);
    static inline QScriptValue::PropertyFlags propertyFlags(JSC::ExecState*, JSC::JSValue value,
                                              const JSC::UString &name, const QScriptValue::ResolveFlags &mode);

    static bool convertValue(JSC::ExecState*, JSC::JSValue value,
                             int type, void *ptr);
    static bool convertNumber(qsreal, int type, void *ptr);
    static bool convertString(const QString &, int type, void *ptr);
    static JSC::JSValue create(JSC::ExecState*, int type, const void *ptr);
    bool hasDemarshalFunction(int type) const;

    inline QScriptValue scriptValueFromJSCValue(JSC::JSValue value);
    inline JSC::JSValue scriptValueToJSCValue(const QScriptValue &value);
    static inline unsigned propertyFlagsToJSCAttributes(const QScriptValue::PropertyFlags &flags);

    static inline JSC::JSValue jscValueFromVariant(JSC::ExecState*, const QVariant &value);
    static QVariant jscValueToVariant(JSC::ExecState*, JSC::JSValue value, int targetType);
    static inline QVariant &variantValue(JSC::JSValue value);
    static inline void setVariantValue(JSC::JSValue objectValue, const QVariant &value);

    static JSC::JSValue arrayFromStringList(JSC::ExecState*, const QStringList &lst);
    static QStringList stringListFromArray(JSC::ExecState*, JSC::JSValue arr);

    static JSC::JSValue arrayFromVariantList(JSC::ExecState*, const QVariantList &lst);
    static QVariantList variantListFromArray(JSC::ExecState*, JSC::JSArray *arr);

    static JSC::JSValue objectFromVariantMap(JSC::ExecState*, const QVariantMap &vmap);
    static QVariantMap variantMapFromObject(JSC::ExecState*, JSC::JSObject *obj);

    JSC::JSValue defaultPrototype(int metaTypeId) const;
    void setDefaultPrototype(int metaTypeId, JSC::JSValue prototype);

    static inline QScriptContext *contextForFrame(JSC::ExecState *frame);
    static inline JSC::ExecState *frameForContext(QScriptContext *context);
    static inline const JSC::ExecState *frameForContext(const QScriptContext *context);

    static inline bool hasValidCodeBlockRegister(JSC::ExecState *frame);

    JSC::JSGlobalObject *originalGlobalObject() const;
    JSC::JSObject *getOriginalGlobalObjectProxy();
    JSC::JSObject *customGlobalObject() const;
    JSC::JSObject *globalObject() const;
    void setGlobalObject(JSC::JSObject *object);
    inline JSC::ExecState *globalExec() const;
    JSC::JSValue toUsableValue(JSC::JSValue value);
    static JSC::JSValue thisForContext(JSC::ExecState *frame);
    static JSC::Register *thisRegisterForFrame(JSC::ExecState *frame);

    JSC::CallFrame *pushContext(JSC::CallFrame *exec, JSC::JSValue thisObject, const JSC::ArgList& args,
                                JSC::JSObject *callee, bool calledAsConstructor = false, bool clearScopeChain = false);
    void popContext();

    void mark(JSC::MarkStack& markStack);
    bool isCollecting() const;
    void collectGarbage();
    void reportAdditionalMemoryCost(int size);

    //flags that we set on the return value register for native function. (ie when codeBlock is 0)
    enum ContextFlags {
        NativeContext = 1,
        CalledAsConstructorContext = 2,
        HasScopeContext = 4, // Specifies that the is a QScriptActivationObject
        ShouldRestoreCallFrame = 8
    };
    static uint contextFlags(JSC::ExecState *);
    static void setContextFlags(JSC::ExecState *, uint);

    QScript::TimeoutCheckerProxy *timeoutChecker() const;

    void agentDeleted(QScriptEngineAgent *agent);

    static inline void saveException(JSC::ExecState *, JSC::JSValue *);
    static inline void restoreException(JSC::ExecState *, JSC::JSValue);

    void setCurrentException(QScriptValue exception) { m_currentException = exception; }
    QScriptValue currentException() const { return m_currentException; }
    void clearCurrentException() { m_currentException.d_ptr.reset(); }

    static QScriptSyntaxCheckResult checkSyntax(const QString &program);
    static bool canEvaluate(const QString &program);

    inline void registerScriptProgram(QScriptProgramPrivate *program);
    inline void unregisterScriptProgram(QScriptProgramPrivate *program);
    void detachAllRegisteredScriptPrograms();

    inline QScriptValuePrivate *allocateScriptValuePrivate(size_t);
    inline void freeScriptValuePrivate(QScriptValuePrivate *p);

    inline void registerScriptValue(QScriptValuePrivate *value);
    inline void unregisterScriptValue(QScriptValuePrivate *value);
    void detachAllRegisteredScriptValues();

    inline void registerScriptString(QScriptStringPrivate *value);
    inline void unregisterScriptString(QScriptStringPrivate *value);
    void detachAllRegisteredScriptStrings();
    QScriptString toStringHandle(const JSC::Identifier &name);

    static inline JSC::JSValue newArray(JSC::ExecState *, uint length);
    static inline JSC::JSValue newDate(JSC::ExecState *, qsreal value);
    static inline JSC::JSValue newDate(JSC::ExecState *, const QDateTime &);
    inline JSC::JSValue newObject();

#ifndef QT_NO_REGEXP
    static JSC::JSValue newRegExp(JSC::ExecState *, const QRegExp &);
#endif

    static JSC::JSValue newRegExp(JSC::ExecState *, const QString &pattern, const QString &flags);
    JSC::JSValue newVariant(const QVariant &);
    JSC::JSValue newVariant(JSC::JSValue objectValue, const QVariant &);

    static inline QScriptDeclarativeClass *declarativeClass(JSC::JSValue);
    static inline QScriptDeclarativeClass::Object *declarativeObject(JSC::JSValue);

    JSC::UString translationContextFromUrl(const JSC::UString &);

#ifndef QT_NO_QOBJECT
    JSC::JSValue newQObject(QObject *object,
        QScriptEngine::ValueOwnership ownership = QScriptEngine::QtOwnership,
        const QScriptEngine:: QObjectWrapOptions &options = 0);
    JSC::JSValue newQMetaObject(const QMetaObject *metaObject,
                                JSC::JSValue ctor);

    static bool convertToNativeQObject(JSC::ExecState*, JSC::JSValue,
                                       const QByteArray &targetType,
                                       void **result);

    JSC::JSValue evaluateHelper(JSC::ExecState *exec, intptr_t sourceId,
                                JSC::EvalExecutable *executable,
                                bool &compile);

    QScript::QObjectData *qobjectData(QObject *object);
    void disposeQObject(QObject *object);
    void emitSignalHandlerException();

    bool scriptConnect(QObject *sender, const char *signal,
                       JSC::JSValue receiver, JSC::JSValue function,
                       Qt::ConnectionType type);
    bool scriptDisconnect(QObject *sender, const char *signal,
                          JSC::JSValue receiver, JSC::JSValue function);

    bool scriptConnect(QObject *sender, int index,
                       JSC::JSValue receiver, JSC::JSValue function,
                       JSC::JSValue senderWrapper,
                       Qt::ConnectionType type);
    bool scriptDisconnect(QObject *sender, int index,
                          JSC::JSValue receiver, JSC::JSValue function);

    bool scriptConnect(JSC::JSValue signal, JSC::JSValue receiver,
                       JSC::JSValue function, Qt::ConnectionType type);
    bool scriptDisconnect(JSC::JSValue signal, JSC::JSValue receiver,
                          JSC::JSValue function);

    // private slots
    void _q_objectDestroyed(QObject *);
#endif

    JSC::JSGlobalData *globalData;
    JSC::JSObject *originalGlobalObjectProxy;
    JSC::ExecState *currentFrame;

    WTF::RefPtr<JSC::Structure> scriptObjectStructure;
    WTF::RefPtr<JSC::Structure> staticScopeObjectStructure;

    QScript::QObjectPrototype *qobjectPrototype;
    WTF::RefPtr<JSC::Structure> qobjectWrapperObjectStructure;

    QScript::QMetaObjectPrototype *qmetaobjectPrototype;
    WTF::RefPtr<JSC::Structure> qmetaobjectWrapperObjectStructure;

    QScript::QVariantPrototype *variantPrototype;
    WTF::RefPtr<JSC::Structure> variantWrapperObjectStructure;

    QList<QScriptEngineAgent*> ownedAgents;
    QScriptEngineAgent *activeAgent;
    int agentLineNumber;
    QScriptValuePrivate *registeredScriptValues;
    QScriptValuePrivate *freeScriptValues;
    static const int maxFreeScriptValues = 256;
    int freeScriptValuesCount;
    QScriptStringPrivate *registeredScriptStrings;
    QSet<QScriptProgramPrivate*> registeredScriptPrograms;
    QHash<int, QScriptTypeInfo*> m_typeInfos;
    int processEventsInterval;
    QScriptValue abortResult;
    bool inEval;

    JSC::UString cachedTranslationUrl;
    JSC::UString cachedTranslationContext;

    QSet<QString> importedExtensions;
    QSet<QString> extensionsBeingImported;
    
    QHash<intptr_t, QScript::UStringSourceProviderWithFeedback*> loadedScripts;
    QScriptValue m_currentException;

    QSet<JSC::JSObject*> visitedConversionObjects;

#ifndef QT_NO_QOBJECT
    QHash<QObject*, QScript::QObjectData*> m_qobjectData;
#endif

#ifdef QT_NO_QOBJECT
    QScriptEngine *q_ptr;
#endif
};

namespace QScript
{

class APIShim
{
public:
    APIShim(QScriptEnginePrivate *engine)
        : m_engine(engine), m_oldTable(JSC::setCurrentIdentifierTable(engine->globalData->identifierTable))
    {
    }
    ~APIShim()
    {
        JSC::setCurrentIdentifierTable(m_oldTable);
    }

private:
    QScriptEnginePrivate *m_engine;
    JSC::IdentifierTable *m_oldTable;
};

/*Helper class. Main purpose is to give debugger feedback about unloading and loading scripts.
  It keeps pointer to JSGlobalObject assuming that it is always the same - there is no way to update
  this data. Class is internal and used as an implementation detail in and only in QScriptEngine::evaluate.*/
class UStringSourceProviderWithFeedback: public JSC::UStringSourceProvider
{
public:
    static PassRefPtr<UStringSourceProviderWithFeedback> create(
        const JSC::UString& source, const JSC::UString& url,
        int lineNumber, QScriptEnginePrivate* engine)
    {
        return adoptRef(new UStringSourceProviderWithFeedback(source, url, lineNumber, engine));
    }

    /* Destruction means that there is no more copies of script so create scriptUnload event
       and unregister script in QScriptEnginePrivate::loadedScripts */
    virtual ~UStringSourceProviderWithFeedback()
    {
        if (m_ptr) {
            if (JSC::Debugger* debugger = this->debugger())
                debugger->scriptUnload(asID());
            m_ptr->loadedScripts.remove(asID());
        }
    }

    /* set internal QScriptEnginePrivate pointer to null and create unloadScript event, should be called
       only if QScriptEnginePrivate is about to be  destroyed.*/
    void disconnectFromEngine()
    {
        if (JSC::Debugger* debugger = this->debugger())
            debugger->scriptUnload(asID());
        m_ptr = 0;
    }

    int columnNumberFromOffset(int offset) const
    {
        for (const UChar *c = m_source.data() + offset; c >= m_source.data(); --c) {
            if (JSC::Lexer::isLineTerminator(*c))
                return offset - static_cast<int>(c - data());
        }
        return offset + 1;
    }

protected:
    UStringSourceProviderWithFeedback(const JSC::UString& source, const JSC::UString& url,
                                      int lineNumber, QScriptEnginePrivate* engine)
        : UStringSourceProvider(source, url),
          m_ptr(engine)
    {
        if (JSC::Debugger* debugger = this->debugger())
            debugger->scriptLoad(asID(), source, url, lineNumber);
        if (m_ptr)
            m_ptr->loadedScripts.insert(asID(), this);
    }

    JSC::Debugger* debugger()
    {
        //if m_ptr is null it mean that QScriptEnginePrivate was destroyed and scriptUnload was called
        //else m_ptr is stable and we can use it as normal pointer without hesitation
        if(!m_ptr)
            return 0; //we are in ~QScriptEnginePrivate
        else
            return m_ptr->originalGlobalObject()->debugger(); //QScriptEnginePrivate is still alive
    }

    //trace global object and debugger instance
    QScriptEnginePrivate* m_ptr;
};

class SaveFrameHelper
{
public:
    SaveFrameHelper(QScriptEnginePrivate *eng,
                    JSC::ExecState *newFrame)
        : engine(eng), oldFrame(eng->currentFrame)
    {
        eng->currentFrame = newFrame;
    }
    ~SaveFrameHelper()
    {
        engine->currentFrame = oldFrame;
    }
private:
    QScriptEnginePrivate *engine;
    JSC::ExecState *oldFrame;
};

inline QScriptEnginePrivate *scriptEngineFromExec(const JSC::ExecState *exec)
{
    return static_cast<GlobalClientData*>(exec->globalData().clientData)->engine;
}

#ifndef Q_CC_MSVC
// MSVC2008 crashes if these are inlined.

inline QString ToString(qsreal value)
{
    return JSC::UString::from(value);
}

inline qsreal ToNumber(const QString &value)
{
    return ((JSC::UString)value).toDouble();
}

#endif

inline qint32 ToInt32(const QString &value)
{
    return ToInt32(ToNumber(value));
}

inline quint32 ToUInt32(const QString &value)
{
    return ToUInt32(ToNumber(value));
}

inline quint16 ToUInt16(const QString &value)
{
    return ToUInt16(ToNumber(value));
}

inline qsreal ToInteger(const QString &value)
{
    return ToInteger(ToNumber(value));
}

inline bool ToBool(qsreal value)
{
    return (value != 0) && !qIsNaN(value);
}

inline bool ToBool(const QString &value)
{
     return !value.isEmpty();
}

inline void convertToLatin1_helper(const UChar *i, int length, char *s)
{
    const UChar *e = i + length;
    while (i != e)
        *(s++) = (uchar) *(i++);
    *s = '\0';
}

inline QByteArray convertToLatin1(const JSC::UString &str)
{
    QByteArray ba(str.size(), Qt::Uninitialized);
    convertToLatin1_helper(str.data(), str.size(), ba.data());
    return ba;
}

} // namespace QScript

inline void QScriptEnginePrivate::registerScriptProgram(QScriptProgramPrivate *program)
{
    Q_ASSERT(!registeredScriptPrograms.contains(program));
    registeredScriptPrograms.insert(program);
}

inline void QScriptEnginePrivate::unregisterScriptProgram(QScriptProgramPrivate *program)
{
    Q_ASSERT(registeredScriptPrograms.contains(program));
    registeredScriptPrograms.remove(program);
}

inline QScriptValuePrivate *QScriptEnginePrivate::allocateScriptValuePrivate(size_t size)
{
    if (freeScriptValues) {
        QScriptValuePrivate *p = freeScriptValues;
        freeScriptValues = p->next;
        --freeScriptValuesCount;
        return p;
    }
    return reinterpret_cast<QScriptValuePrivate*>(qMalloc(size));
}

inline void QScriptEnginePrivate::freeScriptValuePrivate(QScriptValuePrivate *p)
{
    if (freeScriptValuesCount < maxFreeScriptValues) {
        p->next = freeScriptValues;
        freeScriptValues = p;
        ++freeScriptValuesCount;
    } else {
        qFree(p);
    }
}

inline void QScriptEnginePrivate::registerScriptValue(QScriptValuePrivate *value)
{
    value->prev = 0;
    value->next = registeredScriptValues;
    if (registeredScriptValues)
        registeredScriptValues->prev = value;
    registeredScriptValues = value;
}

inline void QScriptEnginePrivate::unregisterScriptValue(QScriptValuePrivate *value)
{
    if (value->prev)
        value->prev->next = value->next;
    if (value->next)
        value->next->prev = value->prev;
    if (value == registeredScriptValues)
        registeredScriptValues = value->next;
    value->prev = 0;
    value->next = 0;
}

inline JSC::JSValue QScriptEnginePrivate::jscValueFromVariant(JSC::ExecState *exec, const QVariant &v)
{
    JSC::JSValue result = create(exec, v.userType(), v.data());
    Q_ASSERT(result);
    return result;
}

inline QScriptValue QScriptEnginePrivate::scriptValueFromJSCValue(JSC::JSValue value)
{
    if (!value)
        return QScriptValue();

    QScriptValuePrivate *p_value = new (this)QScriptValuePrivate(this);
    p_value->initFrom(value);
    return QScriptValuePrivate::toPublic(p_value);
}

inline JSC::JSValue QScriptEnginePrivate::scriptValueToJSCValue(const QScriptValue &value)
{
    QScriptValuePrivate *vv = QScriptValuePrivate::get(value);
    if (!vv)
        return JSC::JSValue();
    if (vv->type != QScriptValuePrivate::JavaScriptCore) {
        Q_ASSERT(!vv->engine || vv->engine == this);
        vv->engine = this;
        if (vv->type == QScriptValuePrivate::Number) {
            vv->initFrom(JSC::jsNumber(currentFrame, vv->numberValue));
        } else { //QScriptValuePrivate::String
            vv->initFrom(JSC::jsString(currentFrame, vv->stringValue));
        }
    }
    return vv->jscValue;
}

inline unsigned QScriptEnginePrivate::propertyFlagsToJSCAttributes(const QScriptValue::PropertyFlags &flags)
{
    unsigned attribs = 0;
    if (flags & QScriptValue::ReadOnly)
        attribs |= JSC::ReadOnly;
    if (flags & QScriptValue::SkipInEnumeration)
        attribs |= JSC::DontEnum;
    if (flags & QScriptValue::Undeletable)
        attribs |= JSC::DontDelete;
    attribs |= flags & QScriptValue::UserRange;
    return attribs;
}

inline QScriptValuePrivate::~QScriptValuePrivate()
{
    if (engine)
        engine->unregisterScriptValue(this);
}

inline void QScriptValuePrivate::initFrom(JSC::JSValue value)
{
    if (value.isCell()) {
        Q_ASSERT(engine != 0);
        value = engine->toUsableValue(value);
    }
    type = JavaScriptCore;
    jscValue = value;
    if (engine)
        engine->registerScriptValue(this);
}

inline void QScriptValuePrivate::initFrom(qsreal value)
{
    type = Number;
    numberValue = value;
    if (engine)
        engine->registerScriptValue(this);
}

inline void QScriptValuePrivate::initFrom(const QString &value)
{
    type = String;
    stringValue = value;
    if (engine)
        engine->registerScriptValue(this);
}

inline JSC::JSValue QScriptEnginePrivate::property(JSC::ExecState *exec, JSC::JSValue value, const JSC::UString &name, int resolveMode)
{
    return property(exec, value, JSC::Identifier(exec, name), resolveMode);
}

inline JSC::JSValue QScriptEnginePrivate::property(JSC::ExecState *exec, JSC::JSValue value, const JSC::Identifier &id, int resolveMode)
{
    Q_ASSERT(isObject(value));
    JSC::JSObject *object = JSC::asObject(value);
    JSC::PropertySlot slot(object);
    if ((resolveMode & QScriptValue::ResolvePrototype) && object->getPropertySlot(exec, id, slot))
        return slot.getValue(exec, id);
    return propertyHelper(exec, value, id, resolveMode);
}

inline JSC::JSValue QScriptEnginePrivate::property(JSC::ExecState *exec, JSC::JSValue value, quint32 index, int resolveMode)
{
    Q_ASSERT(isObject(value));
    JSC::JSObject *object = JSC::asObject(value);
    JSC::PropertySlot slot(object);
    if ((resolveMode & QScriptValue::ResolvePrototype) && object->getPropertySlot(exec, index, slot))
        return slot.getValue(exec, index);
    return propertyHelper(exec, value, index, resolveMode);
}

inline QScriptValue::PropertyFlags QScriptEnginePrivate::propertyFlags(JSC::ExecState *exec, JSC::JSValue value,
                                                                       const JSC::UString &name,
                                                                       const QScriptValue::ResolveFlags &mode)
{
    return propertyFlags(exec, value, JSC::Identifier(exec, name), mode);
}

inline void QScriptEnginePrivate::setProperty(JSC::ExecState *exec, JSC::JSValue objectValue, const JSC::UString &name,
                                              JSC::JSValue value, const QScriptValue::PropertyFlags &flags)
{
    setProperty(exec, objectValue, JSC::Identifier(exec, name), value, flags);
}

inline JSC::JSValue QScriptValuePrivate::property(const JSC::Identifier &id, const QScriptValue::ResolveFlags &resolveMode) const
{
    return QScriptEnginePrivate::property(engine->currentFrame, jscValue, id, resolveMode);
}

inline JSC::JSValue QScriptValuePrivate::property(quint32 index, const QScriptValue::ResolveFlags &resolveMode) const
{
    return QScriptEnginePrivate::property(engine->currentFrame, jscValue, index, resolveMode);
}

inline JSC::JSValue QScriptValuePrivate::property(const JSC::UString &name, const QScriptValue::ResolveFlags &resolveMode) const
{
    JSC::ExecState *exec = engine->currentFrame;
    return QScriptEnginePrivate::property(exec, jscValue, JSC::Identifier(exec, name), resolveMode);
}

inline QScriptValue::PropertyFlags QScriptValuePrivate::propertyFlags(
        const JSC::Identifier &id, const QScriptValue::ResolveFlags &mode) const
{
    return QScriptEnginePrivate::propertyFlags(engine->currentFrame, jscValue, id, mode);
}

inline void QScriptValuePrivate::setProperty(const JSC::Identifier &id, const JSC::JSValue &value,
                                             const QScriptValue::PropertyFlags &flags)
{
    QScriptEnginePrivate::setProperty(engine->currentFrame, jscValue, id, value, flags);
}

inline void QScriptValuePrivate::setProperty(quint32 index, const JSC::JSValue &value,
                                             const QScriptValue::PropertyFlags &flags)
{
    QScriptEnginePrivate::setProperty(engine->currentFrame, jscValue, index, value, flags);
}

inline void QScriptValuePrivate::setProperty(const JSC::UString &name, const JSC::JSValue &value,
                                             const QScriptValue::PropertyFlags &flags)
{
    JSC::ExecState *exec = engine->currentFrame;
    QScriptEnginePrivate::setProperty(exec, jscValue, JSC::Identifier(exec, name), value, flags);
}

inline void* QScriptValuePrivate::operator new(size_t size, QScriptEnginePrivate *engine)
{
    if (engine)
        return engine->allocateScriptValuePrivate(size);
    return qMalloc(size);
}

inline void QScriptValuePrivate::operator delete(void *ptr)
{
    QScriptValuePrivate *d = reinterpret_cast<QScriptValuePrivate*>(ptr);
    if (d->engine)
        d->engine->freeScriptValuePrivate(d);
    else
        qFree(d);
}

inline void QScriptEnginePrivate::saveException(JSC::ExecState *exec, JSC::JSValue *val)
{
    if (exec) {
        *val = exec->exception();
        exec->clearException();
    } else {
        *val = JSC::JSValue();
    }
}

inline void QScriptEnginePrivate::restoreException(JSC::ExecState *exec, JSC::JSValue val)
{
    if (exec && val)
        exec->setException(val);
}

inline void QScriptEnginePrivate::registerScriptString(QScriptStringPrivate *value)
{
    Q_ASSERT(value->type == QScriptStringPrivate::HeapAllocated);
    value->prev = 0;
    value->next = registeredScriptStrings;
    if (registeredScriptStrings)
        registeredScriptStrings->prev = value;
    registeredScriptStrings = value;
}

inline void QScriptEnginePrivate::unregisterScriptString(QScriptStringPrivate *value)
{
    Q_ASSERT(value->type == QScriptStringPrivate::HeapAllocated);
    if (value->prev)
        value->prev->next = value->next;
    if (value->next)
        value->next->prev = value->prev;
    if (value == registeredScriptStrings)
        registeredScriptStrings = value->next;
    value->prev = 0;
    value->next = 0;
}

inline QScriptContext *QScriptEnginePrivate::contextForFrame(JSC::ExecState *frame)
{
    if (frame && frame->callerFrame()->hasHostCallFrameFlag() && !frame->callee()
        && frame->callerFrame()->removeHostCallFrameFlag() == QScript::scriptEngineFromExec(frame)->globalExec()) {
        //skip the "fake" context created in Interpreter::execute.
        frame = frame->callerFrame()->removeHostCallFrameFlag();
    }
    return reinterpret_cast<QScriptContext *>(frame);
}

inline JSC::ExecState *QScriptEnginePrivate::frameForContext(QScriptContext *context)
{
    return reinterpret_cast<JSC::ExecState*>(context);
}

inline const JSC::ExecState *QScriptEnginePrivate::frameForContext(const QScriptContext *context)
{
    return reinterpret_cast<const JSC::ExecState*>(context);
}

inline bool QScriptEnginePrivate::hasValidCodeBlockRegister(JSC::ExecState *frame)
{
#if ENABLE(JIT)
    // Frames created by the VM don't have their CodeBlock register
    // initialized. We can detect such frames by checking if the
    // callee is a host JSFunction.
    JSC::JSObject *callee = frame->callee();
    return !(callee && callee->inherits(&JSC::JSFunction::info)
             && JSC::asFunction(callee)->isHostFunction());
#else
    Q_UNUSED(frame);
    return true;
#endif
}

inline JSC::ExecState *QScriptEnginePrivate::globalExec() const
{
    return originalGlobalObject()->globalExec();
}

inline JSC::JSValue QScriptEnginePrivate::newArray(JSC::ExecState *exec, uint length)
{
    return JSC::constructEmptyArray(exec, length);
}

inline JSC::JSValue QScriptEnginePrivate::newDate(JSC::ExecState *exec, qsreal value)
{
    JSC::JSValue val = JSC::jsNumber(exec, value);
    JSC::ArgList args(&val, 1);
    return JSC::constructDate(exec, args);
}

inline JSC::JSValue QScriptEnginePrivate::newDate(JSC::ExecState *exec, const QDateTime &value)
{
    return newDate(exec, QScript::DateTimeToMs(exec, value));
}

inline JSC::JSValue QScriptEnginePrivate::newObject()
{
    return new (currentFrame)QScriptObject(scriptObjectStructure);
}

inline bool QScriptEnginePrivate::isObject(JSC::JSValue value)
{
    return value && value.isObject();
}

inline bool QScriptEnginePrivate::isArray(JSC::JSValue value)
{
    return isObject(value) && value.inherits(&JSC::JSArray::info);
}

inline bool QScriptEnginePrivate::isDate(JSC::JSValue value)
{
    return isObject(value) && value.inherits(&JSC::DateInstance::info);
}

inline bool QScriptEnginePrivate::isError(JSC::JSValue value)
{
    return isObject(value) && value.inherits(&JSC::ErrorInstance::info);
}

inline bool QScriptEnginePrivate::isRegExp(JSC::JSValue value)
{
    return isObject(value) && value.inherits(&JSC::RegExpObject::info);
}

inline bool QScriptEnginePrivate::isVariant(JSC::JSValue value)
{
    if (!isObject(value) || !value.inherits(&QScriptObject::info))
        return false;
    QScriptObject *object = static_cast<QScriptObject*>(JSC::asObject(value));
    QScriptObjectDelegate *delegate = object->delegate();
    return (delegate && (delegate->type() == QScriptObjectDelegate::Variant));
}

inline bool QScriptEnginePrivate::isQObject(JSC::JSValue value)
{
#ifndef QT_NO_QOBJECT
    if (!isObject(value) || !value.inherits(&QScriptObject::info))
        return false;
    QScriptObject *object = static_cast<QScriptObject*>(JSC::asObject(value));
    QScriptObjectDelegate *delegate = object->delegate();
    return (delegate && (delegate->type() == QScriptObjectDelegate::QtObject ||
                         (delegate->type() == QScriptObjectDelegate::DeclarativeClassObject &&
                          static_cast<QScript::DeclarativeObjectDelegate*>(delegate)->scriptClass()->isQObject())));
#else
    return false;
#endif
}

inline bool QScriptEnginePrivate::isQMetaObject(JSC::JSValue value)
{
#ifndef QT_NO_QOBJECT
    return isObject(value) && JSC::asObject(value)->inherits(&QScript::QMetaObjectWrapperObject::info);
#else
    return false;
#endif
}

inline bool QScriptEnginePrivate::toBool(JSC::ExecState *exec, JSC::JSValue value)
{
    JSC::JSValue savedException;
    saveException(exec, &savedException);
    bool result = value.toBoolean(exec);
    restoreException(exec, savedException);
    return result;
}

inline qsreal QScriptEnginePrivate::toInteger(JSC::ExecState *exec, JSC::JSValue value)
{
    JSC::JSValue savedException;
    saveException(exec, &savedException);
    qsreal result = value.toInteger(exec);
    restoreException(exec, savedException);
    return result;
}

inline qsreal QScriptEnginePrivate::toNumber(JSC::ExecState *exec, JSC::JSValue value)
{
    JSC::JSValue savedException;
    saveException(exec, &savedException);
    qsreal result = value.toNumber(exec);
    restoreException(exec, savedException);
    return result;
}

inline qint32 QScriptEnginePrivate::toInt32(JSC::ExecState *exec, JSC::JSValue value)
{
    JSC::JSValue savedException;
    saveException(exec, &savedException);
    qint32 result = value.toInt32(exec);
    restoreException(exec, savedException);
    return result;
}

inline quint32 QScriptEnginePrivate::toUInt32(JSC::ExecState *exec, JSC::JSValue value)
{
    JSC::JSValue savedException;
    saveException(exec, &savedException);
    quint32 result = value.toUInt32(exec);
    restoreException(exec, savedException);
    return result;
}

inline quint16 QScriptEnginePrivate::toUInt16(JSC::ExecState *exec, JSC::JSValue value)
{
    // ### no equivalent function in JSC
    return QScript::ToUInt16(toNumber(exec, value));
}

inline JSC::UString QScriptEnginePrivate::toString(JSC::ExecState *exec, JSC::JSValue value)
{
    JSC::JSValue savedException;
    saveException(exec, &savedException);
    JSC::UString str = value.toString(exec);
    if (exec && exec->hadException() && !str.size()) {
        JSC::JSValue savedException2;
        saveException(exec, &savedException2);
        str = savedException2.toString(exec);
        restoreException(exec, savedException2);
    }
    if (savedException)
        restoreException(exec, savedException);
    return str;
}

inline QDateTime QScriptEnginePrivate::toDateTime(JSC::ExecState *exec, JSC::JSValue value)
{
    if (!isDate(value))
        return QDateTime();
    qsreal t = static_cast<JSC::DateInstance*>(JSC::asObject(value))->internalNumber();
    return QScript::MsToDateTime(exec, t);
}

inline QObject *QScriptEnginePrivate::toQObject(JSC::ExecState *exec, JSC::JSValue value)
{
#ifndef QT_NO_QOBJECT
    if (isObject(value) && value.inherits(&QScriptObject::info)) {
        QScriptObject *object = static_cast<QScriptObject*>(JSC::asObject(value));
        QScriptObjectDelegate *delegate = object->delegate();
        if (!delegate)
            return 0;
        if (delegate->type() == QScriptObjectDelegate::QtObject)
            return static_cast<QScript::QObjectDelegate*>(delegate)->value();
        if (delegate->type() == QScriptObjectDelegate::DeclarativeClassObject)
            return static_cast<QScript::DeclarativeObjectDelegate*>(delegate)->scriptClass()->toQObject(declarativeObject(value));
        if (delegate->type() == QScriptObjectDelegate::Variant) {
            QVariant var = variantValue(value);
            int type = var.userType();
            if ((type == QMetaType::QObjectStar) || (type == QMetaType::QWidgetStar))
                return *reinterpret_cast<QObject* const *>(var.constData());
        }
    }
#endif
    return 0;
}

inline const QMetaObject *QScriptEnginePrivate::toQMetaObject(JSC::ExecState*, JSC::JSValue value)
{
#ifndef QT_NO_QOBJECT
    if (isQMetaObject(value))
        return static_cast<QScript::QMetaObjectWrapperObject*>(JSC::asObject(value))->value();
#endif
    return 0;
}

inline QVariant &QScriptEnginePrivate::variantValue(JSC::JSValue value)
{
    Q_ASSERT(value.inherits(&QScriptObject::info));
    QScriptObjectDelegate *delegate = static_cast<QScriptObject*>(JSC::asObject(value))->delegate();
    Q_ASSERT(delegate && (delegate->type() == QScriptObjectDelegate::Variant));
    return static_cast<QScript::QVariantDelegate*>(delegate)->value();
}

inline void QScriptEnginePrivate::setVariantValue(JSC::JSValue objectValue, const QVariant &value)
{
    Q_ASSERT(objectValue.inherits(&QScriptObject::info));
    QScriptObjectDelegate *delegate = static_cast<QScriptObject*>(JSC::asObject(objectValue))->delegate();
    Q_ASSERT(delegate && (delegate->type() == QScriptObjectDelegate::Variant));
    static_cast<QScript::QVariantDelegate*>(delegate)->setValue(value);
}

inline QScriptDeclarativeClass *QScriptEnginePrivate::declarativeClass(JSC::JSValue v)
{
    if (!QScriptEnginePrivate::isObject(v) || !v.inherits(&QScriptObject::info))
        return 0;
    QScriptObject *scriptObject = static_cast<QScriptObject*>(JSC::asObject(v));
    QScriptObjectDelegate *delegate = scriptObject->delegate();
    if (!delegate || (delegate->type() != QScriptObjectDelegate::DeclarativeClassObject))
        return 0;
    return static_cast<QScript::DeclarativeObjectDelegate*>(delegate)->scriptClass();
}

inline QScriptDeclarativeClass::Object *QScriptEnginePrivate::declarativeObject(JSC::JSValue v)
{
    if (!QScriptEnginePrivate::isObject(v) || !v.inherits(&QScriptObject::info))
        return 0;
    QScriptObject *scriptObject = static_cast<QScriptObject*>(JSC::asObject(v));
    QScriptObjectDelegate *delegate = scriptObject->delegate();
    if (!delegate || (delegate->type() != QScriptObjectDelegate::DeclarativeClassObject))
        return 0;
    return static_cast<QScript::DeclarativeObjectDelegate*>(delegate)->object();
}

QT_END_NAMESPACE

#endif