summaryrefslogtreecommitdiffstats
path: root/src/script/api/qscriptengine.cpp
blob: e2999c19d562f2c4808a63a59a4c422c462a3b49 (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
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtScript module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL-ONLY$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

#include "config.h"
#include "qscriptengine.h"
#include "qscriptsyntaxchecker_p.h"

#include "qscriptengine_p.h"
#include "qscriptengineagent_p.h"
#include "qscriptcontext_p.h"
#include "qscriptstring_p.h"
#include "qscriptvalue_p.h"
#include "qscriptvalueiterator.h"
#include "qscriptclass.h"
#include "qscriptcontextinfo.h"
#include "qscriptprogram.h"
#include "qscriptprogram_p.h"
#include "qdebug.h"

#include <QtCore/qstringlist.h>
#include <QtCore/qmetaobject.h>

#include <math.h>

#include "CodeBlock.h"
#include "Error.h"
#include "JSLock.h"
#include "Interpreter.h"

#include "PrototypeFunction.h"
#include "InitializeThreading.h"
#include "ObjectPrototype.h"
#include "SourceCode.h"
#include "FunctionPrototype.h"
#include "TimeoutChecker.h"
#include "JSFunction.h"
#include "Parser.h"
#include "PropertyNameArray.h"
#include "Operations.h"

#include "bridge/qscriptfunction_p.h"
#include "bridge/qscriptclassobject_p.h"
#include "bridge/qscriptvariant_p.h"
#include "bridge/qscriptqobject_p.h"
#include "bridge/qscriptglobalobject_p.h"
#include "bridge/qscriptactivationobject_p.h"

#ifndef QT_NO_QOBJECT
#include <QtCore/qcoreapplication.h>
#include <QtCore/qdir.h>
#include <QtCore/qfile.h>
#include <QtCore/qfileinfo.h>
#include <QtCore/qpluginloader.h>
#include <QtCore/qset.h>
#include <QtCore/qtextstream.h>
#include "qscriptextensioninterface.h"
#endif

Q_DECLARE_METATYPE(QScriptValue)
#ifndef QT_NO_QOBJECT
Q_DECLARE_METATYPE(QObjectList)
#endif
Q_DECLARE_METATYPE(QList<int>)

QT_BEGIN_NAMESPACE

/*!
  \since 4.3
  \class QScriptEngine
  \reentrant

  \brief The QScriptEngine class provides an environment for evaluating Qt Script code.

  \ingroup script
  \mainclass

  See the \l{QtScript} documentation for information about the Qt Script language,
  and how to get started with scripting your C++ application.

  \section1 Evaluating Scripts

  Use evaluate() to evaluate script code; this is the C++ equivalent
  of the built-in script function \c{eval()}.

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 0

  evaluate() returns a QScriptValue that holds the result of the
  evaluation. The QScriptValue class provides functions for converting
  the result to various C++ types (e.g. QScriptValue::toString()
  and QScriptValue::toNumber()).

  The following code snippet shows how a script function can be
  defined and then invoked from C++ using QScriptValue::call():

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 1

  As can be seen from the above snippets, a script is provided to the
  engine in the form of a string. One common way of loading scripts is
  by reading the contents of a file and passing it to evaluate():

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 2

  Here we pass the name of the file as the second argument to
  evaluate().  This does not affect evaluation in any way; the second
  argument is a general-purpose string that is used to identify the
  script for debugging purposes (for example, our filename will now
  show up in any uncaughtExceptionBacktrace() involving the script).

  \section1 Engine Configuration

  The globalObject() function returns the \bold {Global Object}
  associated with the script engine. Properties of the Global Object
  are accessible from any script code (i.e. they are global
  variables). Typically, before evaluating "user" scripts, you will
  want to configure a script engine by adding one or more properties
  to the Global Object:

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 3

  Adding custom properties to the scripting environment is one of the
  standard means of providing a scripting API that is specific to your
  application. Usually these custom properties are objects created by
  the newQObject() or newObject() functions, or constructor functions
  created by newFunction().

  \section1 Script Exceptions

  evaluate() can throw a script exception (e.g. due to a syntax
  error); in that case, the return value is the value that was thrown
  (typically an \c{Error} object). You can check whether the
  evaluation caused an exception by calling hasUncaughtException(). In
  that case, you can call toString() on the error object to obtain an
  error message. The current uncaught exception is also available
  through uncaughtException(). You can obtain a human-readable
  backtrace of the exception with uncaughtExceptionBacktrace().
  Calling clearExceptions() will cause any uncaught exceptions to be
  cleared.

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 4

  The checkSyntax() function can be used to determine whether code can be
  usefully passed to evaluate().

  \section1 Script Object Creation

  Use newObject() to create a standard Qt Script object; this is the
  C++ equivalent of the script statement \c{new Object()}. You can use
  the object-specific functionality in QScriptValue to manipulate the
  script object (e.g. QScriptValue::setProperty()). Similarly, use
  newArray() to create a Qt Script array object. Use newDate() to
  create a \c{Date} object, and newRegExp() to create a \c{RegExp}
  object.

  \section1 QObject Integration

  Use newQObject() to wrap a QObject (or subclass)
  pointer. newQObject() returns a proxy script object; properties,
  children, and signals and slots of the QObject are available as
  properties of the proxy object. No binding code is needed because it
  is done dynamically using the Qt meta object system.

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 5

  Use qScriptConnect() to connect a C++ signal to a script function;
  this is the Qt Script equivalent of QObject::connect().  When a
  script function is invoked in response to a C++ signal, it can cause
  a script exception; you can connect to the signalHandlerException()
  signal to catch such an exception.

  Use newQMetaObject() to wrap a QMetaObject; this gives you a "script
  representation" of a QObject-based class. newQMetaObject() returns a
  proxy script object; enum values of the class are available as
  properties of the proxy object. You can also specify a function that
  will be used to construct objects of the class (e.g.  when the
  constructor is invoked from a script). For classes that have a
  "standard" Qt constructor, Qt Script can provide a default script
  constructor for you; see scriptValueFromQMetaObject().

  See the \l{QtScript} documentation for more information on
  the QObject integration.

  \section1 Support for Custom C++ Types

  Use newVariant() to wrap a QVariant. This can be used to store
  values of custom (non-QObject) C++ types that have been registered
  with the Qt meta-type system. To make such types scriptable, you
  typically associate a prototype (delegate) object with the C++ type
  by calling setDefaultPrototype(); the prototype object defines the
  scripting API for the C++ type. Unlike the QObject integration,
  there is no automatic binding possible here; i.e. you have to create
  the scripting API yourself, for example by using the QScriptable
  class.

  Use fromScriptValue() to cast from a QScriptValue to another type,
  and toScriptValue() to create a QScriptValue from another value.
  You can specify how the conversion of C++ types is to be performed
  with qScriptRegisterMetaType() and qScriptRegisterSequenceMetaType().
  By default, Qt Script will use QVariant to store values of custom
  types.

  \section1 Importing Extensions

  Use importExtension() to import plugin-based extensions into the
  engine. Call availableExtensions() to obtain a list naming all the
  available extensions, and importedExtensions() to obtain a list
  naming only those extensions that have been imported.

  Call pushContext() to open up a new variable scope, and popContext()
  to close the current scope. This is useful if you are implementing
  an extension that evaluates script code containing temporary
  variable definitions (e.g. \c{var foo = 123;}) that are safe to
  discard when evaluation has completed.

  \section1 Native Functions

  Use newFunction() to wrap native (C++) functions, including
  constructors for your own custom types, so that these can be invoked
  from script code. Such functions must have the signature
  QScriptEngine::FunctionSignature. You may then pass the function as
  argument to newFunction(). Here is an example of a function that
  returns the sum of its first two arguments:

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 6

  To expose this function to script code, you can set it as a property
  of the Global Object:

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 7

  Once this is done, script code can call your function in the exact
  same manner as a "normal" script function:

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 8

  \section1 Long-running Scripts

  If you need to evaluate possibly long-running scripts from the main
  (GUI) thread, you should first call setProcessEventsInterval() to
  make sure that the GUI stays responsive. You can abort a currently
  running script by calling abortEvaluation(). You can determine
  whether an engine is currently running a script by calling
  isEvaluating().

  \section1 Garbage Collection

  Qt Script objects may be garbage collected when they are no longer
  referenced. There is no guarantee as to when automatic garbage
  collection will take place.

  The collectGarbage() function can be called to explicitly request
  garbage collection.

  The reportAdditionalMemoryCost() function can be called to indicate
  that a Qt Script object occupies memory that isn't managed by the
  scripting environment. Reporting the additional cost makes it more
  likely that the garbage collector will be triggered. This can be
  useful, for example, when many custom, native Qt Script objects are
  allocated.

  \section1 Core Debugging/Tracing Facilities

  Since Qt 4.4, you can be notified of events pertaining to script
  execution (e.g. script function calls and statement execution)
  through the QScriptEngineAgent interface; see the setAgent()
  function. This can be used to implement debugging and profiling of a
  QScriptEngine.

  \sa QScriptValue, QScriptContext, QScriptEngineAgent

*/

/*!
    \enum QScriptEngine::ValueOwnership

    This enum specifies the ownership when wrapping a C++ value, e.g. by using newQObject().

    \value QtOwnership The standard Qt ownership rules apply, i.e. the
    associated object will never be explicitly deleted by the script
    engine. This is the default. (QObject ownership is explained in
    \l{Object Trees & Ownership}.)

    \value ScriptOwnership The value is owned by the script
    environment. The associated data will be deleted when appropriate
    (i.e. after the garbage collector has discovered that there are no
    more live references to the value).

    \value AutoOwnership If the associated object has a parent, the Qt
    ownership rules apply (QtOwnership); otherwise, the object is
    owned by the script environment (ScriptOwnership).

*/

/*!
    \enum  QScriptEngine::QObjectWrapOption

    These flags specify options when wrapping a QObject pointer with newQObject().

    \value ExcludeChildObjects The script object will not expose child objects as properties.
    \value ExcludeSuperClassMethods The script object will not expose signals and slots inherited from the superclass.
    \value ExcludeSuperClassProperties The script object will not expose properties inherited from the superclass.
    \value ExcludeSuperClassContents Shorthand form for ExcludeSuperClassMethods | ExcludeSuperClassProperties
    \value ExcludeDeleteLater The script object will not expose the QObject::deleteLater() slot.
    \value ExcludeSlots The script object will not expose the QObject's slots.
    \value AutoCreateDynamicProperties Properties that don't already exist in the QObject will be created as dynamic properties of that object, rather than as properties of the script object.
    \value PreferExistingWrapperObject If a wrapper object with the requested configuration already exists, return that object.
    \value SkipMethodsInEnumeration Don't include methods (signals and slots) when enumerating the object's properties.
*/

class QScriptSyntaxCheckResultPrivate
{
public:
    QScriptSyntaxCheckResultPrivate() { ref = 0; }
    ~QScriptSyntaxCheckResultPrivate() {}

    QScriptSyntaxCheckResult::State state;
    int errorColumnNumber;
    int errorLineNumber;
    QString errorMessage;
    QBasicAtomicInt ref;
};

class QScriptTypeInfo
{
public:
    QScriptTypeInfo() : signature(0, '\0'), marshal(0), demarshal(0)
    { }

    QByteArray signature;
    QScriptEngine::MarshalFunction marshal;
    QScriptEngine::DemarshalFunction demarshal;
    JSC::JSValue prototype;
};

namespace QScript
{

static const qsreal D32 = 4294967296.0;

qint32 ToInt32(qsreal n)
{
    if (qIsNaN(n) || qIsInf(n) || (n == 0))
        return 0;

    qsreal sign = (n < 0) ? -1.0 : 1.0;
    qsreal abs_n = fabs(n);

    n = ::fmod(sign * ::floor(abs_n), D32);
    const double D31 = D32 / 2.0;

    if (sign == -1 && n < -D31)
        n += D32;

    else if (sign != -1 && n >= D31)
        n -= D32;

    return qint32 (n);
}

quint32 ToUInt32(qsreal n)
{
    if (qIsNaN(n) || qIsInf(n) || (n == 0))
        return 0;

    qsreal sign = (n < 0) ? -1.0 : 1.0;
    qsreal abs_n = fabs(n);

    n = ::fmod(sign * ::floor(abs_n), D32);

    if (n < 0)
        n += D32;

    return quint32 (n);
}

quint16 ToUInt16(qsreal n)
{
    static const qsreal D16 = 65536.0;

    if (qIsNaN(n) || qIsInf(n) || (n == 0))
        return 0;

    qsreal sign = (n < 0) ? -1.0 : 1.0;
    qsreal abs_n = fabs(n);

    n = ::fmod(sign * ::floor(abs_n), D16);

    if (n < 0)
        n += D16;

    return quint16 (n);
}

qsreal ToInteger(qsreal n)
{
    if (qIsNaN(n))
        return 0;

    if (n == 0 || qIsInf(n))
        return n;

    int sign = n < 0 ? -1 : 1;
    return sign * ::floor(::fabs(n));
}

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

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

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

#endif

void GlobalClientData::mark(JSC::MarkStack& markStack)
{
    engine->mark(markStack);
}

class TimeoutCheckerProxy : public JSC::TimeoutChecker
{
public:
    TimeoutCheckerProxy(const JSC::TimeoutChecker& originalChecker)
        : JSC::TimeoutChecker(originalChecker)
        , m_shouldProcessEvents(false)
        , m_shouldAbortEvaluation(false)
    {}

    void setShouldProcessEvents(bool shouldProcess) { m_shouldProcessEvents = shouldProcess; }
    void setShouldAbort(bool shouldAbort) { m_shouldAbortEvaluation = shouldAbort; }
    bool shouldAbort() { return m_shouldAbortEvaluation; }

    virtual bool didTimeOut(JSC::ExecState* exec)
    {
        if (JSC::TimeoutChecker::didTimeOut(exec))
            return true;

        if (m_shouldProcessEvents)
            QCoreApplication::processEvents();

        return m_shouldAbortEvaluation;
    }

private:
    bool m_shouldProcessEvents;
    bool m_shouldAbortEvaluation;
};

static int toDigit(char c)
{
    if ((c >= '0') && (c <= '9'))
        return c - '0';
    else if ((c >= 'a') && (c <= 'z'))
        return 10 + c - 'a';
    else if ((c >= 'A') && (c <= 'Z'))
        return 10 + c - 'A';
    return -1;
}

qsreal integerFromString(const char *buf, int size, int radix)
{
    if (size == 0)
        return qSNaN();

    qsreal sign = 1.0;
    int i = 0;
    if (buf[0] == '+') {
        ++i;
    } else if (buf[0] == '-') {
        sign = -1.0;
        ++i;
    }

    if (((size-i) >= 2) && (buf[i] == '0')) {
        if (((buf[i+1] == 'x') || (buf[i+1] == 'X'))
            && (radix < 34)) {
            if ((radix != 0) && (radix != 16))
                return 0;
            radix = 16;
            i += 2;
        } else {
            if (radix == 0) {
                radix = 8;
                ++i;
            }
        }
    } else if (radix == 0) {
        radix = 10;
    }

    int j = i;
    for ( ; i < size; ++i) {
        int d = toDigit(buf[i]);
        if ((d == -1) || (d >= radix))
            break;
    }
    qsreal result;
    if (j == i) {
        if (!qstrcmp(buf, "Infinity"))
            result = qInf();
        else
            result = qSNaN();
    } else {
        result = 0;
        qsreal multiplier = 1;
        for (--i ; i >= j; --i, multiplier *= radix)
            result += toDigit(buf[i]) * multiplier;
    }
    result *= sign;
    return result;
}

qsreal integerFromString(const QString &str, int radix)
{
    QByteArray ba = str.trimmed().toUtf8();
    return integerFromString(ba.constData(), ba.size(), radix);
}

bool isFunction(JSC::JSValue value)
{
    if (!value || !value.isObject())
        return false;
    JSC::CallData callData;
    return (JSC::asObject(value)->getCallData(callData) != JSC::CallTypeNone);
}

static JSC::JSValue JSC_HOST_CALL functionConnect(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);
static JSC::JSValue JSC_HOST_CALL functionDisconnect(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);

JSC::JSValue JSC_HOST_CALL functionDisconnect(JSC::ExecState *exec, JSC::JSObject * /*callee*/, JSC::JSValue thisObject, const JSC::ArgList &args)
{
#ifndef QT_NO_QOBJECT
    if (args.size() == 0) {
        return JSC::throwError(exec, JSC::GeneralError, "Function.prototype.disconnect: no arguments given");
    }

    if (!JSC::asObject(thisObject)->inherits(&QScript::QtFunction::info)) {
        return JSC::throwError(exec, JSC::TypeError, "Function.prototype.disconnect: this object is not a signal");
    }

    QScript::QtFunction *qtSignal = static_cast<QScript::QtFunction*>(JSC::asObject(thisObject));

    const QMetaObject *meta = qtSignal->metaObject();
    if (!meta) {
        return JSC::throwError(exec, JSC::TypeError, "Function.prototype.discconnect: cannot disconnect from deleted QObject");
    }

    QMetaMethod sig = meta->method(qtSignal->initialIndex());
    if (sig.methodType() != QMetaMethod::Signal) {
        QString message = QString::fromLatin1("Function.prototype.disconnect: %0::%1 is not a signal")
                          .arg(QLatin1String(qtSignal->metaObject()->className()))
                          .arg(QLatin1String(sig.signature()));
        return JSC::throwError(exec, JSC::TypeError, message);
    }

    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);

    JSC::JSValue receiver;
    JSC::JSValue slot;
    JSC::JSValue arg0 = args.at(0);
    if (args.size() < 2) {
        slot = arg0;
    } else {
        receiver = arg0;
        JSC::JSValue arg1 = args.at(1);
        if (isFunction(arg1))
            slot = arg1;
        else {
            QScript::SaveFrameHelper saveFrame(engine, exec);
            JSC::UString propertyName = QScriptEnginePrivate::toString(exec, arg1);
            slot = QScriptEnginePrivate::property(exec, arg0, propertyName, QScriptValue::ResolvePrototype);
        }
    }

    if (!isFunction(slot)) {
        return JSC::throwError(exec, JSC::TypeError, "Function.prototype.disconnect: target is not a function");
    }

    bool ok = engine->scriptDisconnect(thisObject, receiver, slot);
    if (!ok) {
        QString message = QString::fromLatin1("Function.prototype.disconnect: failed to disconnect from %0::%1")
                          .arg(QLatin1String(qtSignal->metaObject()->className()))
                          .arg(QLatin1String(sig.signature()));
        return JSC::throwError(exec, JSC::GeneralError, message);
    }
    return JSC::jsUndefined();
#else
    Q_UNUSED(eng);
    return context->throwError(QScriptContext::TypeError,
                               QLatin1String("Function.prototype.disconnect"));
#endif // QT_NO_QOBJECT
}

JSC::JSValue JSC_HOST_CALL functionConnect(JSC::ExecState *exec, JSC::JSObject * /*callee*/, JSC::JSValue thisObject, const JSC::ArgList &args)
{
#ifndef QT_NO_QOBJECT
    if (args.size() == 0) {
        return JSC::throwError(exec, JSC::GeneralError,"Function.prototype.connect: no arguments given");
    }

    if (!JSC::asObject(thisObject)->inherits(&QScript::QtFunction::info)) {
        return JSC::throwError(exec, JSC::TypeError, "Function.prototype.connect: this object is not a signal");
    }

    QScript::QtFunction *qtSignal = static_cast<QScript::QtFunction*>(JSC::asObject(thisObject));

    const QMetaObject *meta = qtSignal->metaObject();
    if (!meta) {
        return JSC::throwError(exec, JSC::TypeError, "Function.prototype.connect: cannot connect to deleted QObject");
    }

    QMetaMethod sig = meta->method(qtSignal->initialIndex());
    if (sig.methodType() != QMetaMethod::Signal) {
        QString message = QString::fromLatin1("Function.prototype.connect: %0::%1 is not a signal")
                          .arg(QLatin1String(qtSignal->metaObject()->className()))
                          .arg(QLatin1String(sig.signature()));
        return JSC::throwError(exec, JSC::TypeError, message);
    }

    {
        QList<int> overloads = qtSignal->overloadedIndexes();
        if (!overloads.isEmpty()) {
            overloads.append(qtSignal->initialIndex());
            QByteArray signature = sig.signature();
            QString message = QString::fromLatin1("Function.prototype.connect: ambiguous connect to %0::%1(); candidates are\n")
                              .arg(QLatin1String(qtSignal->metaObject()->className()))
                              .arg(QLatin1String(signature.left(signature.indexOf('('))));
            for (int i = 0; i < overloads.size(); ++i) {
                QMetaMethod mtd = meta->method(overloads.at(i));
                message.append(QString::fromLatin1("    %0\n").arg(QString::fromLatin1(mtd.signature())));
            }
            message.append(QString::fromLatin1("Use e.g. object['%0'].connect() to connect to a particular overload")
                           .arg(QLatin1String(signature)));
            return JSC::throwError(exec, JSC::GeneralError, message);
        }
    }

    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);

    JSC::JSValue receiver;
    JSC::JSValue slot;
    JSC::JSValue arg0 = args.at(0);
    if (args.size() < 2) {
        slot = arg0;
    } else {
        receiver = arg0;
        JSC::JSValue arg1 = args.at(1);
        if (isFunction(arg1))
            slot = arg1;
        else {
            QScript::SaveFrameHelper saveFrame(engine, exec);
            JSC::UString propertyName = QScriptEnginePrivate::toString(exec, arg1);
            slot = QScriptEnginePrivate::property(exec, arg0, propertyName, QScriptValue::ResolvePrototype);
        }
    }

    if (!isFunction(slot)) {
        return JSC::throwError(exec, JSC::TypeError, "Function.prototype.connect: target is not a function");
    }

    bool ok = engine->scriptConnect(thisObject, receiver, slot, Qt::AutoConnection);
    if (!ok) {
        QString message = QString::fromLatin1("Function.prototype.connect: failed to connect to %0::%1")
                          .arg(QLatin1String(qtSignal->metaObject()->className()))
                          .arg(QLatin1String(sig.signature()));
        return JSC::throwError(exec, JSC::GeneralError, message);
    }
    return JSC::jsUndefined();
#else
    Q_UNUSED(eng);
    Q_UNUSED(classInfo);
    return context->throwError(QScriptContext::TypeError,
                               QLatin1String("Function.prototype.connect"));
#endif // QT_NO_QOBJECT
}

static JSC::JSValue JSC_HOST_CALL functionPrint(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);
static JSC::JSValue JSC_HOST_CALL functionGC(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);
static JSC::JSValue JSC_HOST_CALL functionVersion(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);

JSC::JSValue JSC_HOST_CALL functionPrint(JSC::ExecState* exec, JSC::JSObject*, JSC::JSValue, const JSC::ArgList& args)
{
    QString result;
    for (unsigned i = 0; i < args.size(); ++i) {
        if (i != 0)
            result.append(QLatin1Char(' '));
        QString s(args.at(i).toString(exec));
        if (exec->hadException())
            break;
        result.append(s);
    }
    if (exec->hadException())
        return exec->exception();
    qDebug("%s", qPrintable(result));
    return JSC::jsUndefined();
}

JSC::JSValue JSC_HOST_CALL functionGC(JSC::ExecState* exec, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&)
{
    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
    engine->collectGarbage();
    return JSC::jsUndefined();
}

JSC::JSValue JSC_HOST_CALL functionVersion(JSC::ExecState *exec, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&)
{
    return JSC::JSValue(exec, 1);
}

static JSC::JSValue JSC_HOST_CALL functionQsTranslate(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);
static JSC::JSValue JSC_HOST_CALL functionQsTranslateNoOp(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);
static JSC::JSValue JSC_HOST_CALL functionQsTr(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);
static JSC::JSValue JSC_HOST_CALL functionQsTrNoOp(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);

JSC::JSValue JSC_HOST_CALL functionQsTranslate(JSC::ExecState *exec, JSC::JSObject*, JSC::JSValue, const JSC::ArgList &args)
{
    if (args.size() < 2)
        return JSC::throwError(exec, JSC::GeneralError, "qsTranslate() requires at least two arguments");
    if (!args.at(0).isString())
        return JSC::throwError(exec, JSC::GeneralError, "qsTranslate(): first argument (context) must be a string");
    if (!args.at(1).isString())
        return JSC::throwError(exec, JSC::GeneralError, "qsTranslate(): second argument (text) must be a string");
    if ((args.size() > 2) && !args.at(2).isString())
        return JSC::throwError(exec, JSC::GeneralError, "qsTranslate(): third argument (comment) must be a string");
    if ((args.size() > 3) && !args.at(3).isString())
        return JSC::throwError(exec, JSC::GeneralError, "qsTranslate(): fourth argument (encoding) must be a string");
    if ((args.size() > 4) && !args.at(4).isNumber())
        return JSC::throwError(exec, JSC::GeneralError, "qsTranslate(): fifth argument (n) must be a number");
#ifndef QT_NO_QOBJECT
    JSC::UString context = args.at(0).toString(exec);
#endif
    JSC::UString text = args.at(1).toString(exec);
#ifndef QT_NO_QOBJECT
    JSC::UString comment;
    if (args.size() > 2)
        comment = args.at(2).toString(exec);
    QCoreApplication::Encoding encoding = QCoreApplication::CodecForTr;
    if (args.size() > 3) {
        JSC::UString encStr = args.at(3).toString(exec);
        if (encStr == "CodecForTr")
            encoding = QCoreApplication::CodecForTr;
        else if (encStr == "UnicodeUTF8")
            encoding = QCoreApplication::UnicodeUTF8;
        else
            return JSC::throwError(exec, JSC::GeneralError, QString::fromLatin1("qsTranslate(): invalid encoding '%0'").arg(encStr));
    }
    int n = -1;
    if (args.size() > 4)
        n = args.at(4).toInt32(exec);
#endif
    JSC::UString result;
#ifndef QT_NO_QOBJECT
    result = QCoreApplication::translate(QScript::convertToLatin1(context).constData(),
                                         QScript::convertToLatin1(text).constData(),
                                         QScript::convertToLatin1(comment).constData(),
                                         encoding, n);
#else
    result = text;
#endif
    return JSC::jsString(exec, result);
}

JSC::JSValue JSC_HOST_CALL functionQsTranslateNoOp(JSC::ExecState *, JSC::JSObject*, JSC::JSValue, const JSC::ArgList &args)
{
    if (args.size() < 2)
        return JSC::jsUndefined();
    return args.at(1);
}

JSC::JSValue JSC_HOST_CALL functionQsTr(JSC::ExecState *exec, JSC::JSObject*, JSC::JSValue, const JSC::ArgList &args)
{
    if (args.size() < 1)
        return JSC::throwError(exec, JSC::GeneralError, "qsTr() requires at least one argument");
    if (!args.at(0).isString())
        return JSC::throwError(exec, JSC::GeneralError, "qsTr(): first argument (text) must be a string");
    if ((args.size() > 1) && !args.at(1).isString())
        return JSC::throwError(exec, JSC::GeneralError, "qsTr(): second argument (comment) must be a string");
    if ((args.size() > 2) && !args.at(2).isNumber())
        return JSC::throwError(exec, JSC::GeneralError, "qsTr(): third argument (n) must be a number");
#ifndef QT_NO_QOBJECT
    QScriptEnginePrivate *engine = scriptEngineFromExec(exec);
    JSC::UString context;
    // The first non-empty source URL in the call stack determines the translation context.
    {
        JSC::ExecState *frame = exec->callerFrame()->removeHostCallFrameFlag();
        while (frame) {
            if (frame->codeBlock() && frame->codeBlock()->source()
                && !frame->codeBlock()->source()->url().isEmpty()) {
                context = engine->translationContextFromUrl(frame->codeBlock()->source()->url());
                break;
            }
            frame = frame->callerFrame()->removeHostCallFrameFlag();
        }
    }
#endif
    JSC::UString text = args.at(0).toString(exec);
#ifndef QT_NO_QOBJECT
    JSC::UString comment;
    if (args.size() > 1)
        comment = args.at(1).toString(exec);
    int n = -1;
    if (args.size() > 2)
        n = args.at(2).toInt32(exec);
#endif
    JSC::UString result;
#ifndef QT_NO_QOBJECT
    result = QCoreApplication::translate(QScript::convertToLatin1(context).constData(),
                                         QScript::convertToLatin1(text).constData(),
                                         QScript::convertToLatin1(comment).constData(),
                                         QCoreApplication::CodecForTr, n);
#else
    result = text;
#endif
    return JSC::jsString(exec, result);
}

JSC::JSValue JSC_HOST_CALL functionQsTrNoOp(JSC::ExecState *, JSC::JSObject*, JSC::JSValue, const JSC::ArgList &args)
{
    if (args.size() < 1)
        return JSC::jsUndefined();
    return args.at(0);
}

static JSC::JSValue JSC_HOST_CALL stringProtoFuncArg(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);

JSC::JSValue JSC_HOST_CALL stringProtoFuncArg(JSC::ExecState *exec, JSC::JSObject*, JSC::JSValue thisObject, const JSC::ArgList &args)
{
    QString value(thisObject.toString(exec));
    JSC::JSValue arg = (args.size() != 0) ? args.at(0) : JSC::jsUndefined();
    QString result;
    if (arg.isString())
        result = value.arg(arg.toString(exec));
    else if (arg.isNumber())
        result = value.arg(arg.toNumber(exec));
    return JSC::jsString(exec, result);
}


#if !defined(QT_NO_QOBJECT) && !defined(QT_NO_LIBRARY)
static QScriptValue __setupPackage__(QScriptContext *ctx, QScriptEngine *eng)
{
    QString path = ctx->argument(0).toString();
    QStringList components = path.split(QLatin1Char('.'));
    QScriptValue o = eng->globalObject();
    for (int i = 0; i < components.count(); ++i) {
        QString name = components.at(i);
        QScriptValue oo = o.property(name);
        if (!oo.isValid()) {
            oo = eng->newObject();
            o.setProperty(name, oo);
        }
        o = oo;
    }
    return o;
}
#endif

} // namespace QScript

QScriptEnginePrivate::QScriptEnginePrivate()
    : registeredScriptValues(0), freeScriptValues(0), freeScriptValuesCount(0),
      registeredScriptStrings(0), inEval(false)
{
    qMetaTypeId<QScriptValue>();
    qMetaTypeId<QList<int> >();
#ifndef QT_NO_QOBJECT
    qMetaTypeId<QObjectList>();
#endif

    if (!QCoreApplication::instance()) {
        qFatal("QScriptEngine: Must construct a Q(Core)Application before a QScriptEngine");
        return;
    }
    JSC::initializeThreading();
    JSC::IdentifierTable *oldTable = JSC::currentIdentifierTable();
    globalData = JSC::JSGlobalData::create().releaseRef();
    globalData->clientData = new QScript::GlobalClientData(this);
    JSC::JSGlobalObject *globalObject = new (globalData)QScript::GlobalObject();

    JSC::ExecState* exec = globalObject->globalExec();

    scriptObjectStructure = QScriptObject::createStructure(globalObject->objectPrototype());

    qobjectPrototype = new (exec) QScript::QObjectPrototype(exec, QScript::QObjectPrototype::createStructure(globalObject->objectPrototype()), globalObject->prototypeFunctionStructure());
    qobjectWrapperObjectStructure = QScriptObject::createStructure(qobjectPrototype);

    qmetaobjectPrototype = new (exec) QScript::QMetaObjectPrototype(exec, QScript::QMetaObjectPrototype::createStructure(globalObject->objectPrototype()), globalObject->prototypeFunctionStructure());
    qmetaobjectWrapperObjectStructure = QScript::QMetaObjectWrapperObject::createStructure(qmetaobjectPrototype);

    variantPrototype = new (exec) QScript::QVariantPrototype(exec, QScript::QVariantPrototype::createStructure(globalObject->objectPrototype()), globalObject->prototypeFunctionStructure());
    variantWrapperObjectStructure = QScriptObject::createStructure(variantPrototype);

    globalObject->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, globalObject->prototypeFunctionStructure(), 1, JSC::Identifier(exec, "print"), QScript::functionPrint));
    globalObject->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, globalObject->prototypeFunctionStructure(), 0, JSC::Identifier(exec, "gc"), QScript::functionGC));
    globalObject->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, globalObject->prototypeFunctionStructure(), 0, JSC::Identifier(exec, "version"), QScript::functionVersion));

    // ### rather than extending Function.prototype, consider creating a QtSignal.prototype
    globalObject->functionPrototype()->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, globalObject->prototypeFunctionStructure(), 1, JSC::Identifier(exec, "disconnect"), QScript::functionDisconnect));
    globalObject->functionPrototype()->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, globalObject->prototypeFunctionStructure(), 1, JSC::Identifier(exec, "connect"), QScript::functionConnect));

    JSC::TimeoutChecker* originalChecker = globalData->timeoutChecker;
    globalData->timeoutChecker = new QScript::TimeoutCheckerProxy(*originalChecker);
    delete originalChecker;

    currentFrame = exec;

    originalGlobalObjectProxy = 0;
    activeAgent = 0;
    agentLineNumber = -1;
    processEventsInterval = -1;
    cachedTranslationUrl = JSC::UString();
    cachedTranslationContext = JSC::UString();
    JSC::setCurrentIdentifierTable(oldTable);
}

QScriptEnginePrivate::~QScriptEnginePrivate()
{
    QScript::APIShim shim(this);

    //disconnect all loadedScripts and generate all jsc::debugger::scriptUnload events
    QHash<intptr_t,QScript::UStringSourceProviderWithFeedback*>::const_iterator it;
    for (it = loadedScripts.constBegin(); it != loadedScripts.constEnd(); ++it)
        it.value()->disconnectFromEngine();

    while (!ownedAgents.isEmpty())
        delete ownedAgents.takeFirst();

    detachAllRegisteredScriptValues();
    detachAllRegisteredScriptStrings();
    qDeleteAll(m_qobjectData);
    qDeleteAll(m_typeInfos);
    JSC::JSLock lock(false);
    globalData->heap.destroy();
    globalData->deref();
    while (freeScriptValues) {
        QScriptValuePrivate *p = freeScriptValues;
        freeScriptValues = p->next;
        qFree(p);
    }
}

QVariant QScriptEnginePrivate::jscValueToVariant(JSC::ExecState *exec, JSC::JSValue value, int targetType)
{
    QVariant v(targetType, (void *)0);
    if (convertValue(exec, value, targetType, v.data()))
        return v;
    if (uint(targetType) == QVariant::LastType)
        return toVariant(exec, value);
    if (isVariant(value)) {
        v = variantValue(value);
        if (v.canConvert(QVariant::Type(targetType))) {
            v.convert(QVariant::Type(targetType));
            return v;
        }
        QByteArray typeName = v.typeName();
        if (typeName.endsWith('*')
            && (QMetaType::type(typeName.left(typeName.size()-1)) == targetType)) {
            return QVariant(targetType, *reinterpret_cast<void* *>(v.data()));
        }
    }
    return QVariant();
}

JSC::JSValue QScriptEnginePrivate::arrayFromStringList(JSC::ExecState *exec, const QStringList &lst)
{
    JSC::JSValue arr =  newArray(exec, lst.size());
    for (int i = 0; i < lst.size(); ++i)
        setProperty(exec, arr, i, JSC::jsString(exec, lst.at(i)));
    return arr;
}

QStringList QScriptEnginePrivate::stringListFromArray(JSC::ExecState *exec, JSC::JSValue arr)
{
    QStringList lst;
    uint len = toUInt32(exec, property(exec, arr, exec->propertyNames().length));
    for (uint i = 0; i < len; ++i)
        lst.append(toString(exec, property(exec, arr, i)));
    return lst;
}

JSC::JSValue QScriptEnginePrivate::arrayFromVariantList(JSC::ExecState *exec, const QVariantList &lst)
{
    JSC::JSValue arr = newArray(exec, lst.size());
    for (int i = 0; i < lst.size(); ++i)
        setProperty(exec, arr, i, jscValueFromVariant(exec, lst.at(i)));
    return arr;
}

QVariantList QScriptEnginePrivate::variantListFromArray(JSC::ExecState *exec, JSC::JSArray *arr)
{
    QScriptEnginePrivate *eng = QScript::scriptEngineFromExec(exec);
    if (eng->visitedConversionObjects.contains(arr))
        return QVariantList(); // Avoid recursion.
    eng->visitedConversionObjects.insert(arr);
    QVariantList lst;
    uint len = toUInt32(exec, property(exec, arr, exec->propertyNames().length));
    for (uint i = 0; i < len; ++i)
        lst.append(toVariant(exec, property(exec, arr, i)));
    eng->visitedConversionObjects.remove(arr);
    return lst;
}

JSC::JSValue QScriptEnginePrivate::objectFromVariantMap(JSC::ExecState *exec, const QVariantMap &vmap)
{
    JSC::JSValue obj = JSC::constructEmptyObject(exec);
    QVariantMap::const_iterator it;
    for (it = vmap.constBegin(); it != vmap.constEnd(); ++it)
        setProperty(exec, obj, it.key(), jscValueFromVariant(exec, it.value()));
    return obj;
}

QVariantMap QScriptEnginePrivate::variantMapFromObject(JSC::ExecState *exec, JSC::JSObject *obj)
{
    QScriptEnginePrivate *eng = QScript::scriptEngineFromExec(exec);
    if (eng->visitedConversionObjects.contains(obj))
        return QVariantMap(); // Avoid recursion.
    eng->visitedConversionObjects.insert(obj);
    JSC::PropertyNameArray propertyNames(exec);
    obj->getOwnPropertyNames(exec, propertyNames, JSC::IncludeDontEnumProperties);
    QVariantMap vmap;
    JSC::PropertyNameArray::const_iterator it = propertyNames.begin();
    for( ; it != propertyNames.end(); ++it)
        vmap.insert(it->ustring(), toVariant(exec, property(exec, obj, *it)));
    eng->visitedConversionObjects.remove(obj);
    return vmap;
}

JSC::JSValue QScriptEnginePrivate::defaultPrototype(int metaTypeId) const
{
    QScriptTypeInfo *info = m_typeInfos.value(metaTypeId);
    if (!info)
        return JSC::JSValue();
    return info->prototype;
}

void QScriptEnginePrivate::setDefaultPrototype(int metaTypeId, JSC::JSValue prototype)
{
    QScriptTypeInfo *info = m_typeInfos.value(metaTypeId);
    if (!info) {
        info = new QScriptTypeInfo();
        m_typeInfos.insert(metaTypeId, info);
    }
    info->prototype = prototype;
}

JSC::JSGlobalObject *QScriptEnginePrivate::originalGlobalObject() const
{
    return globalData->head;
}

JSC::JSObject *QScriptEnginePrivate::customGlobalObject() const
{
    QScript::GlobalObject *glob = static_cast<QScript::GlobalObject*>(originalGlobalObject());
    return glob->customGlobalObject;
}

JSC::JSObject *QScriptEnginePrivate::getOriginalGlobalObjectProxy()
{
    if (!originalGlobalObjectProxy) {
        JSC::ExecState* exec = currentFrame;
        originalGlobalObjectProxy = new (exec)QScript::OriginalGlobalObjectProxy(scriptObjectStructure, originalGlobalObject());
    }
    return originalGlobalObjectProxy;
}

JSC::JSObject *QScriptEnginePrivate::globalObject() const
{
    QScript::GlobalObject *glob = static_cast<QScript::GlobalObject*>(originalGlobalObject());
    if (glob->customGlobalObject)
        return glob->customGlobalObject;
    return glob;
}

void QScriptEnginePrivate::setGlobalObject(JSC::JSObject *object)
{
    if (object == globalObject())
        return;
    QScript::GlobalObject *glob = static_cast<QScript::GlobalObject*>(originalGlobalObject());
    if (object == originalGlobalObjectProxy) {
        glob->customGlobalObject = 0;
        // Sync the internal prototype, since JSObject::prototype() is not virtual.
        glob->setPrototype(originalGlobalObjectProxy->prototype());
    } else {
        Q_ASSERT(object != originalGlobalObject());
        glob->customGlobalObject = object;
        // Sync the internal prototype, since JSObject::prototype() is not virtual.
        glob->setPrototype(object->prototype());
    }
}

/*!
  \internal

  If the given \a value is the original global object, returns the custom
  global object or a proxy to the original global object; otherwise returns \a
  value.
*/
JSC::JSValue QScriptEnginePrivate::toUsableValue(JSC::JSValue value)
{
    if (!value || !value.isObject() || !JSC::asObject(value)->isGlobalObject())
        return value;
    Q_ASSERT(JSC::asObject(value) == originalGlobalObject());
    if (customGlobalObject())
        return customGlobalObject();
    if (!originalGlobalObjectProxy)
        originalGlobalObjectProxy = new (currentFrame)QScript::OriginalGlobalObjectProxy(scriptObjectStructure, originalGlobalObject());
    return originalGlobalObjectProxy;
}
/*!
    \internal
    Return the 'this' value for a given context
*/
JSC::JSValue QScriptEnginePrivate::thisForContext(JSC::ExecState *frame)
{
    if (frame->codeBlock() != 0) {
        return frame->thisValue();
    } else if(frame == frame->lexicalGlobalObject()->globalExec()) {
        return frame->globalThisValue();
    } else {
        JSC::Register *thisRegister = thisRegisterForFrame(frame);
        return thisRegister->jsValue();
    }
}

JSC::Register* QScriptEnginePrivate::thisRegisterForFrame(JSC::ExecState *frame)
{
    Q_ASSERT(frame->codeBlock() == 0); // only for native calls
    return frame->registers() - JSC::RegisterFile::CallFrameHeaderSize - frame->argumentCount();
}

/*! \internal
     For native context, we use the ReturnValueRegister entry in the stackframe header to store flags.
     We can do that because this header is not used as the native function return their value thought C++

     when setting flags, NativeContext should always be set

     contextFlags returns 0 for non native context
 */
uint QScriptEnginePrivate::contextFlags(JSC::ExecState *exec)
{
    if (exec->codeBlock())
        return 0; //js function doesn't have flags

    return exec->returnValueRegister();
}

void QScriptEnginePrivate::setContextFlags(JSC::ExecState *exec, uint flags)
{
    Q_ASSERT(!exec->codeBlock());
    exec->registers()[JSC::RegisterFile::ReturnValueRegister] = JSC::Register::withInt(flags);
}


void QScriptEnginePrivate::mark(JSC::MarkStack& markStack)
{
    Q_Q(QScriptEngine);

    markStack.append(originalGlobalObject());
    markStack.append(globalObject());
    if (originalGlobalObjectProxy)
        markStack.append(originalGlobalObjectProxy);

    if (qobjectPrototype)
        markStack.append(qobjectPrototype);
    if (qmetaobjectPrototype)
        markStack.append(qmetaobjectPrototype);
    if (variantPrototype)
        markStack.append(variantPrototype);

    {
        QScriptValuePrivate *it;
        for (it = registeredScriptValues; it != 0; it = it->next) {
            if (it->isJSC())
                markStack.append(it->jscValue);
        }
    }

    {
        QHash<int, QScriptTypeInfo*>::const_iterator it;
        for (it = m_typeInfos.constBegin(); it != m_typeInfos.constEnd(); ++it) {
            if ((*it)->prototype)
                markStack.append((*it)->prototype);
        }
    }

    {
        QScriptContext *context = q->currentContext();

        while (context) {
            JSC::ScopeChainNode *node = frameForContext(context)->scopeChain();
            JSC::ScopeChainIterator it(node);
            for (it = node->begin(); it != node->end(); ++it) {
                JSC::JSObject *object = *it;
                if (object)
                    markStack.append(object);
            }

            context = context->parentContext();
        }
    }

#ifndef QT_NO_QOBJECT
    markStack.drain(); // make sure everything is marked before marking qobject data
    {
        QHash<QObject*, QScript::QObjectData*>::const_iterator it;
        for (it = m_qobjectData.constBegin(); it != m_qobjectData.constEnd(); ++it) {
            QScript::QObjectData *qdata = it.value();
            qdata->mark(markStack);
        }
    }
#endif
}

bool QScriptEnginePrivate::isCollecting() const
{
    return globalData->heap.isBusy();
}

void QScriptEnginePrivate::collectGarbage()
{
    JSC::JSLock lock(false);
    QScript::APIShim shim(this);
    globalData->heap.collectAllGarbage();
}

void QScriptEnginePrivate::reportAdditionalMemoryCost(int size)
{
    if (size > 0)
        globalData->heap.reportExtraMemoryCost(size);
}

QScript::TimeoutCheckerProxy *QScriptEnginePrivate::timeoutChecker() const
{
    return static_cast<QScript::TimeoutCheckerProxy*>(globalData->timeoutChecker);
}

void QScriptEnginePrivate::agentDeleted(QScriptEngineAgent *agent)
{
    ownedAgents.removeOne(agent);
    if (activeAgent == agent) {
        QScriptEngineAgentPrivate::get(agent)->detach();
        activeAgent = 0;
    }
}

JSC::JSValue QScriptEnginePrivate::evaluateHelper(JSC::ExecState *exec, intptr_t sourceId,
                                                  JSC::EvalExecutable *executable,
                                                  bool &compile)
{
    Q_Q(QScriptEngine);
    JSC::JSLock lock(false); // ### hmmm
    QBoolBlocker inEvalBlocker(inEval, true);
    q->currentContext()->activationObject(); //force the creation of a context for native function;

    JSC::Debugger* debugger = originalGlobalObject()->debugger();
    if (debugger)
        debugger->evaluateStart(sourceId);

    q->clearExceptions();
    JSC::DynamicGlobalObjectScope dynamicGlobalObjectScope(exec, exec->scopeChain()->globalObject);

    if (compile) {
        JSC::JSObject* error = executable->compile(exec, exec->scopeChain());
        if (error) {
            compile = false;
            exec->setException(error);

            if (debugger) {
                debugger->exceptionThrow(JSC::DebuggerCallFrame(exec, error), sourceId, false);
                debugger->evaluateStop(error, sourceId);
            }

            return error;
        }
    }

    JSC::JSValue thisValue = thisForContext(exec);
    JSC::JSObject* thisObject = (!thisValue || thisValue.isUndefinedOrNull())
                                ? exec->dynamicGlobalObject() : thisValue.toObject(exec);
    JSC::JSValue exceptionValue;
    timeoutChecker()->setShouldAbort(false);
    if (processEventsInterval > 0)
        timeoutChecker()->reset();

    JSC::JSValue result = exec->interpreter()->execute(executable, exec, thisObject, exec->scopeChain(), &exceptionValue);

    if (timeoutChecker()->shouldAbort()) {
        if (abortResult.isError())
            exec->setException(scriptValueToJSCValue(abortResult));

        if (debugger)
            debugger->evaluateStop(scriptValueToJSCValue(abortResult), sourceId);

        return scriptValueToJSCValue(abortResult);
    }

    if (exceptionValue) {
        exec->setException(exceptionValue);

        if (debugger)
            debugger->evaluateStop(exceptionValue, sourceId);

        return exceptionValue;
    }

    if (debugger)
        debugger->evaluateStop(result, sourceId);

    Q_ASSERT(!exec->hadException());
    return result;
}

#ifndef QT_NO_QOBJECT

JSC::JSValue QScriptEnginePrivate::newQObject(
    QObject *object, QScriptEngine::ValueOwnership ownership,
    const QScriptEngine::QObjectWrapOptions &options)
{
    if (!object)
        return JSC::jsNull();
    JSC::ExecState* exec = currentFrame;
    QScript::QObjectData *data = qobjectData(object);
    bool preferExisting = (options & QScriptEngine::PreferExistingWrapperObject) != 0;
    QScriptEngine::QObjectWrapOptions opt = options & ~QScriptEngine::PreferExistingWrapperObject;
    QScriptObject *result = 0;
    if (preferExisting) {
        result = data->findWrapper(ownership, opt);
        if (result)
            return result;
    }
    result = new (exec) QScriptObject(qobjectWrapperObjectStructure);
    if (preferExisting)
        data->registerWrapper(result, ownership, opt);
    result->setDelegate(new QScript::QObjectDelegate(object, ownership, options));
    /*if (setDefaultPrototype)*/ {
        const QMetaObject *meta = object->metaObject();
        while (meta) {
            QByteArray typeString = meta->className();
            typeString.append('*');
            int typeId = QMetaType::type(typeString);
            if (typeId != 0) {
                JSC::JSValue proto = defaultPrototype(typeId);
                if (proto) {
                    result->setPrototype(proto);
                    break;
                }
            }
            meta = meta->superClass();
        }
    }
    return result;
}

JSC::JSValue QScriptEnginePrivate::newQMetaObject(
    const QMetaObject *metaObject, JSC::JSValue ctor)
{
    if (!metaObject)
        return JSC::jsNull();
    JSC::ExecState* exec = currentFrame;
    QScript::QMetaObjectWrapperObject *result = new (exec) QScript::QMetaObjectWrapperObject(exec, metaObject, ctor, qmetaobjectWrapperObjectStructure);
    return result;
}

bool QScriptEnginePrivate::convertToNativeQObject(JSC::ExecState *exec, JSC::JSValue value,
                                                  const QByteArray &targetType,
                                                  void **result)
{
    if (!targetType.endsWith('*'))
        return false;
    if (QObject *qobject = toQObject(exec, value)) {
        int start = targetType.startsWith("const ") ? 6 : 0;
        QByteArray className = targetType.mid(start, targetType.size()-start-1);
        if (void *instance = qobject->qt_metacast(className)) {
            *result = instance;
            return true;
        }
    }
    return false;
}

QScript::QObjectData *QScriptEnginePrivate::qobjectData(QObject *object)
{
    QHash<QObject*, QScript::QObjectData*>::const_iterator it;
    it = m_qobjectData.constFind(object);
    if (it != m_qobjectData.constEnd())
        return it.value();

    QScript::QObjectData *data = new QScript::QObjectData(this);
    m_qobjectData.insert(object, data);
    QObject::connect(object, SIGNAL(destroyed(QObject*)),
                     q_func(), SLOT(_q_objectDestroyed(QObject*)));
    return data;
}

void QScriptEnginePrivate::_q_objectDestroyed(QObject *object)
{
    QHash<QObject*, QScript::QObjectData*>::iterator it;
    it = m_qobjectData.find(object);
    Q_ASSERT(it != m_qobjectData.end());
    QScript::QObjectData *data = it.value();
    m_qobjectData.erase(it);
    delete data;
}

void QScriptEnginePrivate::disposeQObject(QObject *object)
{
    // TODO
/*    if (isCollecting()) {
        // wait until we're done with GC before deleting it
        int index = m_qobjectsToBeDeleted.indexOf(object);
        if (index == -1)
            m_qobjectsToBeDeleted.append(object);
            } else*/ {
        delete object;
    }
}

void QScriptEnginePrivate::emitSignalHandlerException()
{
    Q_Q(QScriptEngine);
    emit q->signalHandlerException(q->uncaughtException());
}

bool QScriptEnginePrivate::scriptConnect(QObject *sender, const char *signal,
                                         JSC::JSValue receiver, JSC::JSValue function,
                                         Qt::ConnectionType type)
{
    Q_ASSERT(sender);
    Q_ASSERT(signal);
    const QMetaObject *meta = sender->metaObject();
    int index = meta->indexOfSignal(QMetaObject::normalizedSignature(signal+1));
    if (index == -1)
        return false;
    return scriptConnect(sender, index, receiver, function, /*wrapper=*/JSC::JSValue(), type);
}

bool QScriptEnginePrivate::scriptDisconnect(QObject *sender, const char *signal,
                                            JSC::JSValue receiver, JSC::JSValue function)
{
    Q_ASSERT(sender);
    Q_ASSERT(signal);
    const QMetaObject *meta = sender->metaObject();
    int index = meta->indexOfSignal(QMetaObject::normalizedSignature(signal+1));
    if (index == -1)
        return false;
    return scriptDisconnect(sender, index, receiver, function);
}

bool QScriptEnginePrivate::scriptConnect(QObject *sender, int signalIndex,
                                         JSC::JSValue receiver, JSC::JSValue function,
                                         JSC::JSValue senderWrapper,
                                         Qt::ConnectionType type)
{
    QScript::QObjectData *data = qobjectData(sender);
    return data->addSignalHandler(sender, signalIndex, receiver, function, senderWrapper, type);
}

bool QScriptEnginePrivate::scriptDisconnect(QObject *sender, int signalIndex,
                                            JSC::JSValue receiver, JSC::JSValue function)
{
    QScript::QObjectData *data = qobjectData(sender);
    if (!data)
        return false;
    return data->removeSignalHandler(sender, signalIndex, receiver, function);
}

bool QScriptEnginePrivate::scriptConnect(JSC::JSValue signal, JSC::JSValue receiver,
                                         JSC::JSValue function, Qt::ConnectionType type)
{
    QScript::QtFunction *fun = static_cast<QScript::QtFunction*>(JSC::asObject(signal));
    int index = fun->mostGeneralMethod();
    return scriptConnect(fun->qobject(), index, receiver, function, fun->wrapperObject(), type);
}

bool QScriptEnginePrivate::scriptDisconnect(JSC::JSValue signal, JSC::JSValue receiver,
                                            JSC::JSValue function)
{
    QScript::QtFunction *fun = static_cast<QScript::QtFunction*>(JSC::asObject(signal));
    int index = fun->mostGeneralMethod();
    return scriptDisconnect(fun->qobject(), index, receiver, function);
}

#endif

void QScriptEnginePrivate::detachAllRegisteredScriptValues()
{
    QScriptValuePrivate *it;
    QScriptValuePrivate *next;
    for (it = registeredScriptValues; it != 0; it = next) {
        it->detachFromEngine();
        next = it->next;
        it->prev = 0;
        it->next = 0;
    }
    registeredScriptValues = 0;
}

void QScriptEnginePrivate::detachAllRegisteredScriptStrings()
{
    QScriptStringPrivate *it;
    QScriptStringPrivate *next;
    for (it = registeredScriptStrings; it != 0; it = next) {
        it->detachFromEngine();
        next = it->next;
        it->prev = 0;
        it->next = 0;
    }
    registeredScriptStrings = 0;
}

#ifndef QT_NO_REGEXP

Q_CORE_EXPORT QString qt_regexp_toCanonical(const QString &, QRegExp::PatternSyntax);

JSC::JSValue QScriptEnginePrivate::newRegExp(JSC::ExecState *exec, const QRegExp &regexp)
{
    JSC::JSValue buf[2];
    JSC::ArgList args(buf, sizeof(buf));

    //convert the pattern to a ECMAScript pattern
    QString pattern = qt_regexp_toCanonical(regexp.pattern(), regexp.patternSyntax());
    if (regexp.isMinimal()) {
        QString ecmaPattern;
        int len = pattern.length();
        ecmaPattern.reserve(len);
        int i = 0;
        const QChar *wc = pattern.unicode();
        bool inBracket = false;
        while (i < len) {
            QChar c = wc[i++];
            ecmaPattern += c;
            switch (c.unicode()) {
            case '?':
            case '+':
            case '*':
            case '}':
                if (!inBracket)
                    ecmaPattern += QLatin1Char('?');
                break;
            case '\\':
                if (i < len)
                    ecmaPattern += wc[i++];
                break;
            case '[':
                inBracket = true;
                break;
            case ']':
                inBracket = false;
               break;
            default:
                break;
            }
        }
        pattern = ecmaPattern;
    }

    JSC::UString jscPattern = pattern;
    QString flags;
    if (regexp.caseSensitivity() == Qt::CaseInsensitive)
        flags.append(QLatin1Char('i'));
    JSC::UString jscFlags = flags;
    buf[0] = JSC::jsString(exec, jscPattern);
    buf[1] = JSC::jsString(exec, jscFlags);
    return JSC::constructRegExp(exec, args);
}

#endif

JSC::JSValue QScriptEnginePrivate::newRegExp(JSC::ExecState *exec, const QString &pattern, const QString &flags)
{
    JSC::JSValue buf[2];
    JSC::ArgList args(buf, sizeof(buf));
    JSC::UString jscPattern = pattern;
    QString strippedFlags;
    if (flags.contains(QLatin1Char('i')))
        strippedFlags += QLatin1Char('i');
    if (flags.contains(QLatin1Char('m')))
        strippedFlags += QLatin1Char('m');
    if (flags.contains(QLatin1Char('g')))
        strippedFlags += QLatin1Char('g');
    JSC::UString jscFlags = strippedFlags;
    buf[0] = JSC::jsString(exec, jscPattern);
    buf[1] = JSC::jsString(exec, jscFlags);
    return JSC::constructRegExp(exec, args);
}

JSC::JSValue QScriptEnginePrivate::newVariant(const QVariant &value)
{
    QScriptObject *obj = new (currentFrame) QScriptObject(variantWrapperObjectStructure);
    obj->setDelegate(new QScript::QVariantDelegate(value));
    JSC::JSValue proto = defaultPrototype(value.userType());
    if (proto)
        obj->setPrototype(proto);
    return obj;
}

JSC::JSValue QScriptEnginePrivate::newVariant(JSC::JSValue objectValue,
                                              const QVariant &value)
{
    if (!isObject(objectValue))
        return newVariant(value);
    JSC::JSObject *jscObject = JSC::asObject(objectValue);
    if (!jscObject->inherits(&QScriptObject::info)) {
        qWarning("QScriptEngine::newVariant(): changing class of non-QScriptObject not supported");
        return JSC::JSValue();
    }
    QScriptObject *jscScriptObject = static_cast<QScriptObject*>(jscObject);
    if (!isVariant(objectValue)) {
        jscScriptObject->setDelegate(new QScript::QVariantDelegate(value));
    } else {
        setVariantValue(objectValue, value);
    }
    return objectValue;
}

#ifndef QT_NO_REGEXP

QRegExp QScriptEnginePrivate::toRegExp(JSC::ExecState *exec, JSC::JSValue value)
{
    if (!isRegExp(value))
        return QRegExp();
    QString pattern = toString(exec, property(exec, value, "source", QScriptValue::ResolvePrototype));
    Qt::CaseSensitivity kase = Qt::CaseSensitive;
    if (toBool(exec, property(exec, value, "ignoreCase", QScriptValue::ResolvePrototype)))
        kase = Qt::CaseInsensitive;
    return QRegExp(pattern, kase, QRegExp::RegExp2);
}

#endif

QVariant QScriptEnginePrivate::toVariant(JSC::ExecState *exec, JSC::JSValue value)
{
    if (!value) {
        return QVariant();
    } else if (isObject(value)) {
        if (isVariant(value))
            return variantValue(value);
#ifndef QT_NO_QOBJECT
        else if (isQObject(value))
            return qVariantFromValue(toQObject(exec, value));
#endif
        else if (isDate(value))
            return QVariant(toDateTime(exec, value));
#ifndef QT_NO_REGEXP
        else if (isRegExp(value))
            return QVariant(toRegExp(exec, value));
#endif
        else if (isArray(value))
            return variantListFromArray(exec, JSC::asArray(value));
        else if (QScriptDeclarativeClass *dc = declarativeClass(value))
            return dc->toVariant(declarativeObject(value));
        return variantMapFromObject(exec, JSC::asObject(value));
    } else if (value.isNumber()) {
        return QVariant(toNumber(exec, value));
    } else if (value.isString()) {
        return QVariant(toString(exec, value));
    } else if (value.isBoolean()) {
        return QVariant(toBool(exec, value));
    }
    return QVariant();
}

JSC::JSValue QScriptEnginePrivate::propertyHelper(JSC::ExecState *exec, JSC::JSValue value, const JSC::Identifier &id, int resolveMode)
{
    JSC::JSValue result;
    if (!(resolveMode & QScriptValue::ResolvePrototype)) {
        // Look in the object's own properties
        JSC::JSObject *object = JSC::asObject(value);
        JSC::PropertySlot slot(object);
        if (object->getOwnPropertySlot(exec, id, slot))
            result = slot.getValue(exec, id);
    }
    if (!result && (resolveMode & QScriptValue::ResolveScope)) {
        // ### check if it's a function object and look in the scope chain
        JSC::JSValue scope = property(exec, value, "__qt_scope__", QScriptValue::ResolveLocal);
        if (isObject(scope))
            result = property(exec, scope, id, resolveMode);
    }
    return result;
}

JSC::JSValue QScriptEnginePrivate::propertyHelper(JSC::ExecState *exec, JSC::JSValue value, quint32 index, int resolveMode)
{
    JSC::JSValue result;
    if (!(resolveMode & QScriptValue::ResolvePrototype)) {
        // Look in the object's own properties
        JSC::JSObject *object = JSC::asObject(value);
        JSC::PropertySlot slot(object);
        if (object->getOwnPropertySlot(exec, index, slot))
            result = slot.getValue(exec, index);
    }
    return result;
}

void QScriptEnginePrivate::setProperty(JSC::ExecState *exec, JSC::JSValue objectValue, const JSC::Identifier &id,
                                       JSC::JSValue value, const QScriptValue::PropertyFlags &flags)
{
    JSC::JSObject *thisObject = JSC::asObject(objectValue);
    JSC::JSValue setter = thisObject->lookupSetter(exec, id);
    JSC::JSValue getter = thisObject->lookupGetter(exec, id);
    if ((flags & QScriptValue::PropertyGetter) || (flags & QScriptValue::PropertySetter)) {
        if (!value) {
            // deleting getter/setter
            if ((flags & QScriptValue::PropertyGetter) && (flags & QScriptValue::PropertySetter)) {
                // deleting both: just delete the property
                thisObject->deleteProperty(exec, id);
            } else if (flags & QScriptValue::PropertyGetter) {
                // preserve setter, if there is one
                thisObject->deleteProperty(exec, id);
                if (setter && setter.isObject())
                    thisObject->defineSetter(exec, id, JSC::asObject(setter));
            } else { // flags & QScriptValue::PropertySetter
                // preserve getter, if there is one
                thisObject->deleteProperty(exec, id);
                if (getter && getter.isObject())
                    thisObject->defineGetter(exec, id, JSC::asObject(getter));
            }
        } else {
            if (value.isObject()) { // ### should check if it has callData()
                // defining getter/setter
                if (id == exec->propertyNames().underscoreProto) {
                    qWarning("QScriptValue::setProperty() failed: "
                             "cannot set getter or setter of native property `__proto__'");
                } else {
                    if (flags & QScriptValue::PropertyGetter)
                        thisObject->defineGetter(exec, id, JSC::asObject(value));
                    if (flags & QScriptValue::PropertySetter)
                        thisObject->defineSetter(exec, id, JSC::asObject(value));
                }
            } else {
                qWarning("QScriptValue::setProperty(): getter/setter must be a function");
            }
        }
    } else {
        // setting the value
        if (getter && getter.isObject() && !(setter && setter.isObject())) {
            qWarning("QScriptValue::setProperty() failed: "
                     "property '%s' has a getter but no setter",
                     qPrintable(QString(id.ustring())));
            return;
        }
        if (!value) {
            // ### check if it's a getter/setter property
            thisObject->deleteProperty(exec, id);
        } else if (flags != QScriptValue::KeepExistingFlags) {
            if (thisObject->hasOwnProperty(exec, id))
                thisObject->deleteProperty(exec, id); // ### hmmm - can't we just update the attributes?
            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;
            thisObject->putWithAttributes(exec, id, value, attribs);
        } else {
            JSC::PutPropertySlot slot;
            thisObject->put(exec, id, value, slot);
        }
    }
}

void QScriptEnginePrivate::setProperty(JSC::ExecState *exec, JSC::JSValue objectValue, quint32 index,
                                       JSC::JSValue value, const QScriptValue::PropertyFlags &flags)
{
    if (!value) {
        JSC::asObject(objectValue)->deleteProperty(exec, index);
    } else {
        if ((flags & QScriptValue::PropertyGetter) || (flags & QScriptValue::PropertySetter)) {
            // fall back to string-based setProperty(), since there is no
            // JSC::JSObject::defineGetter(unsigned)
            setProperty(exec, objectValue, JSC::Identifier::from(exec, index), value, flags);
        } else {
            if (flags != QScriptValue::KeepExistingFlags) {
                //                if (JSC::asObject(d->jscValue)->hasOwnProperty(exec, arrayIndex))
                //                    JSC::asObject(d->jscValue)->deleteProperty(exec, arrayIndex);
                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;
                JSC::asObject(objectValue)->putWithAttributes(exec, index, value, attribs);
            } else {
                JSC::asObject(objectValue)->put(exec, index, value);
            }
        }
    }
}

QScriptValue::PropertyFlags QScriptEnginePrivate::propertyFlags(JSC::ExecState *exec, JSC::JSValue value, const JSC::Identifier &id,
                                                                const QScriptValue::ResolveFlags &mode)
{
    JSC::JSObject *object = JSC::asObject(value);
    unsigned attribs = 0;
    JSC::PropertyDescriptor descriptor;
    if (object->getOwnPropertyDescriptor(exec, id, descriptor))
        attribs = descriptor.attributes();
    else {
        if ((mode & QScriptValue::ResolvePrototype) && object->prototype() && object->prototype().isObject()) {
            JSC::JSValue proto = object->prototype();
            return propertyFlags(exec, proto, id, mode);
        }
        return 0;
    }
    QScriptValue::PropertyFlags result = 0;
    if (attribs & JSC::ReadOnly)
        result |= QScriptValue::ReadOnly;
    if (attribs & JSC::DontEnum)
        result |= QScriptValue::SkipInEnumeration;
    if (attribs & JSC::DontDelete)
        result |= QScriptValue::Undeletable;
    //We cannot rely on attribs JSC::Setter/Getter because they are not necesserly set by JSC (bug?)
    if (attribs & JSC::Getter || !object->lookupGetter(exec, id).isUndefinedOrNull())
        result |= QScriptValue::PropertyGetter;
    if (attribs & JSC::Setter || !object->lookupSetter(exec, id).isUndefinedOrNull())
        result |= QScriptValue::PropertySetter;
#ifndef QT_NO_QOBJECT
    if (attribs & QScript::QObjectMemberAttribute)
        result |= QScriptValue::QObjectMember;
#endif
    result |= QScriptValue::PropertyFlag(attribs & QScriptValue::UserRange);
    return result;
}

QScriptString QScriptEnginePrivate::toStringHandle(const JSC::Identifier &name)
{
    QScriptString result;
    QScriptStringPrivate *p = new QScriptStringPrivate(this, name, QScriptStringPrivate::HeapAllocated);
    QScriptStringPrivate::init(result, p);
    registerScriptString(p);
    return result;
}

#ifdef QT_NO_QOBJECT

QScriptEngine::QScriptEngine()
    : d_ptr(new QScriptEnginePrivate)
{
    d_ptr->q_ptr = this;
}

/*! \internal
*/
QScriptEngine::QScriptEngine(QScriptEnginePrivate &dd)
    : d_ptr(&dd)
{
    d_ptr->q_ptr = this;
}
#else

/*!
    Constructs a QScriptEngine object.

    The globalObject() is initialized to have properties as described in
    \l{ECMA-262}, Section 15.1.
*/
QScriptEngine::QScriptEngine()
    : QObject(*new QScriptEnginePrivate, 0)
{
}

/*!
    Constructs a QScriptEngine object with the given \a parent.

    The globalObject() is initialized to have properties as described in
    \l{ECMA-262}, Section 15.1.
*/

QScriptEngine::QScriptEngine(QObject *parent)
    : QObject(*new QScriptEnginePrivate, parent)
{
}

/*! \internal
*/
QScriptEngine::QScriptEngine(QScriptEnginePrivate &dd, QObject *parent)
    : QObject(dd, parent)
{
}
#endif

/*!
  Destroys this QScriptEngine.
*/
QScriptEngine::~QScriptEngine()
{
#ifdef QT_NO_QOBJECT
    delete d_ptr;
    d_ptr = 0;
#endif
}

/*!
  Returns this engine's Global Object.

  By default, the Global Object contains the built-in objects that are
  part of \l{ECMA-262}, such as Math, Date and String. Additionally,
  you can set properties of the Global Object to make your own
  extensions available to all script code. Non-local variables in
  script code will be created as properties of the Global Object, as
  well as local variables in global code.
*/
QScriptValue QScriptEngine::globalObject() const
{
    Q_D(const QScriptEngine);
    QScript::APIShim shim(const_cast<QScriptEnginePrivate*>(d));
    JSC::JSObject *result = d->globalObject();
    return const_cast<QScriptEnginePrivate*>(d)->scriptValueFromJSCValue(result);
}

/*!
  \since 4.5

  Sets this engine's Global Object to be the given \a object.
  If \a object is not a valid script object, this function does
  nothing.

  When setting a custom global object, you may want to use
  QScriptValueIterator to copy the properties of the standard Global
  Object; alternatively, you can set the internal prototype of your
  custom object to be the original Global Object.
*/
void QScriptEngine::setGlobalObject(const QScriptValue &object)
{
    Q_D(QScriptEngine);
    if (!object.isObject())
        return;
    QScript::APIShim shim(d);
    JSC::JSObject *jscObject = JSC::asObject(d->scriptValueToJSCValue(object));
    d->setGlobalObject(jscObject);
}

/*!
  Returns a QScriptValue of the primitive type Null.

  \sa undefinedValue()
*/
QScriptValue QScriptEngine::nullValue()
{
    Q_D(QScriptEngine);
    return d->scriptValueFromJSCValue(JSC::jsNull());
}

/*!
  Returns a QScriptValue of the primitive type Undefined.

  \sa nullValue()
*/
QScriptValue QScriptEngine::undefinedValue()
{
    Q_D(QScriptEngine);
    return d->scriptValueFromJSCValue(JSC::jsUndefined());
}

/*!
  Creates a constructor function from \a fun, with the given \a length.
  The \c{prototype} property of the resulting function is set to be the
  given \a prototype. The \c{constructor} property of \a prototype is
  set to be the resulting function.

  When a function is called as a constructor (e.g. \c{new Foo()}), the
  `this' object associated with the function call is the new object
  that the function is expected to initialize; the prototype of this
  default constructed object will be the function's public
  \c{prototype} property. If you always want the function to behave as
  a constructor (e.g. \c{Foo()} should also create a new object), or
  if you need to create your own object rather than using the default
  `this' object, you should make sure that the prototype of your
  object is set correctly; either by setting it manually, or, when
  wrapping a custom type, by having registered the defaultPrototype()
  of that type. Example:

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 9

  To wrap a custom type and provide a constructor for it, you'd typically
  do something like this:

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 10
*/
QScriptValue QScriptEngine::newFunction(QScriptEngine::FunctionSignature fun,
                                        const QScriptValue &prototype,
                                        int length)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    JSC::ExecState* exec = d->currentFrame;
    JSC::JSValue function = new (exec)QScript::FunctionWrapper(exec, length, JSC::Identifier(exec, ""), fun);
    QScriptValue result = d->scriptValueFromJSCValue(function);
    result.setProperty(QLatin1String("prototype"), prototype, QScriptValue::Undeletable);
    const_cast<QScriptValue&>(prototype)
        .setProperty(QLatin1String("constructor"), result,
                     QScriptValue::Undeletable | QScriptValue::SkipInEnumeration);
    return result;
}

#ifndef QT_NO_REGEXP

/*!
  Creates a QtScript object of class RegExp with the given
  \a regexp.

  \sa QScriptValue::toRegExp()
*/
QScriptValue QScriptEngine::newRegExp(const QRegExp &regexp)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    return d->scriptValueFromJSCValue(d->newRegExp(d->currentFrame, regexp));
}

#endif // QT_NO_REGEXP

/*!
  Creates a QtScript object holding the given variant \a value.

  If a default prototype has been registered with the meta type id of
  \a value, then the prototype of the created object will be that
  prototype; otherwise, the prototype will be the Object prototype
  object.

  \sa setDefaultPrototype(), QScriptValue::toVariant(), reportAdditionalMemoryCost()
*/
QScriptValue QScriptEngine::newVariant(const QVariant &value)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    return d->scriptValueFromJSCValue(d->newVariant(value));
}

/*!
  \since 4.4
  \overload

  Initializes the given Qt Script \a object to hold the given variant
  \a value, and returns the \a object.

  This function enables you to "promote" a plain Qt Script object
  (created by the newObject() function) to a variant, or to replace
  the variant contained inside an object previously created by the
  newVariant() function.

  The prototype() of the \a object will remain unchanged.

  If \a object is not an object, this function behaves like the normal
  newVariant(), i.e. it creates a new script object and returns it.

  This function is useful when you want to provide a script
  constructor for a C++ type. If your constructor is invoked in a
  \c{new} expression (QScriptContext::isCalledAsConstructor() returns
  true), you can pass QScriptContext::thisObject() (the default
  constructed script object) to this function to initialize the new
  object.

  \sa reportAdditionalMemoryCost()
*/
QScriptValue QScriptEngine::newVariant(const QScriptValue &object,
                                       const QVariant &value)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    JSC::JSValue jsObject = d->scriptValueToJSCValue(object);
    return d->scriptValueFromJSCValue(d->newVariant(jsObject, value));
}

#ifndef QT_NO_QOBJECT
/*!
  Creates a QtScript object that wraps the given QObject \a
  object, using the given \a ownership. The given \a options control
  various aspects of the interaction with the resulting script object.

  Signals and slots, properties and children of \a object are
  available as properties of the created QScriptValue. For more
  information, see the \l{QtScript} documentation.

  If \a object is a null pointer, this function returns nullValue().

  If a default prototype has been registered for the \a object's class
  (or its superclass, recursively), the prototype of the new script
  object will be set to be that default prototype.

  If the given \a object is deleted outside of QtScript's control, any
  attempt to access the deleted QObject's members through the QtScript
  wrapper object (either by script code or C++) will result in a
  script exception.

  \sa QScriptValue::toQObject(), reportAdditionalMemoryCost()
*/
QScriptValue QScriptEngine::newQObject(QObject *object, ValueOwnership ownership,
                                       const QObjectWrapOptions &options)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    JSC::JSValue jscQObject = d->newQObject(object, ownership, options);
    return d->scriptValueFromJSCValue(jscQObject);
}

/*!
  \since 4.4
  \overload

  Initializes the given \a scriptObject to hold the given \a qtObject,
  and returns the \a scriptObject.

  This function enables you to "promote" a plain Qt Script object
  (created by the newObject() function) to a QObject proxy, or to
  replace the QObject contained inside an object previously created by
  the newQObject() function.

  The prototype() of the \a scriptObject will remain unchanged.

  If \a scriptObject is not an object, this function behaves like the
  normal newQObject(), i.e. it creates a new script object and returns
  it.

  This function is useful when you want to provide a script
  constructor for a QObject-based class. If your constructor is
  invoked in a \c{new} expression
  (QScriptContext::isCalledAsConstructor() returns true), you can pass
  QScriptContext::thisObject() (the default constructed script object)
  to this function to initialize the new object.

  \sa reportAdditionalMemoryCost()
*/
QScriptValue QScriptEngine::newQObject(const QScriptValue &scriptObject,
                                       QObject *qtObject,
                                       ValueOwnership ownership,
                                       const QObjectWrapOptions &options)
{
    Q_D(QScriptEngine);
    if (!scriptObject.isObject())
        return newQObject(qtObject, ownership, options);
    QScript::APIShim shim(d);
    JSC::JSObject *jscObject = JSC::asObject(QScriptValuePrivate::get(scriptObject)->jscValue);
    if (!jscObject->inherits(&QScriptObject::info)) {
        qWarning("QScriptEngine::newQObject(): changing class of non-QScriptObject not supported");
        return QScriptValue();
    }
    QScriptObject *jscScriptObject = static_cast<QScriptObject*>(jscObject);
    if (!scriptObject.isQObject()) {
        jscScriptObject->setDelegate(new QScript::QObjectDelegate(qtObject, ownership, options));
    } else {
        QScript::QObjectDelegate *delegate = static_cast<QScript::QObjectDelegate*>(jscScriptObject->delegate());
        delegate->setValue(qtObject);
        delegate->setOwnership(ownership);
        delegate->setOptions(options);
    }
    return scriptObject;
}

#endif // QT_NO_QOBJECT

/*!
  Creates a QtScript object of class Object.

  The prototype of the created object will be the Object
  prototype object.

  \sa newArray(), QScriptValue::setProperty()
*/
QScriptValue QScriptEngine::newObject()
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    return d->scriptValueFromJSCValue(d->newObject());
}

/*!
  \since 4.4
  \overload

  Creates a QtScript Object of the given class, \a scriptClass.

  The prototype of the created object will be the Object
  prototype object.

  \a data, if specified, is set as the internal data of the
  new object (using QScriptValue::setData()).

  \sa QScriptValue::scriptClass(), reportAdditionalMemoryCost()
*/
QScriptValue QScriptEngine::newObject(QScriptClass *scriptClass,
                                      const QScriptValue &data)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    JSC::ExecState* exec = d->currentFrame;
    QScriptObject *result = new (exec) QScriptObject(d->scriptObjectStructure);
    result->setDelegate(new QScript::ClassObjectDelegate(scriptClass));
    QScriptValue scriptObject = d->scriptValueFromJSCValue(result);
    scriptObject.setData(data);
    QScriptValue proto = scriptClass->prototype();
    if (proto.isValid())
        scriptObject.setPrototype(proto);
    return scriptObject;
}

/*!
  \internal
*/
QScriptValue QScriptEngine::newActivationObject()
{
    qWarning("QScriptEngine::newActivationObject() not implemented");
    // ### JSActivation or JSVariableObject?
    return QScriptValue();
}

/*!
  Creates a QScriptValue that wraps a native (C++) function. \a fun
  must be a C++ function with signature QScriptEngine::FunctionSignature.  \a
  length is the number of arguments that \a fun expects; this becomes
  the \c{length} property of the created QScriptValue.

  Note that \a length only gives an indication of the number of
  arguments that the function expects; an actual invocation of a
  function can include any number of arguments. You can check the
  \l{QScriptContext::argumentCount()}{argumentCount()} of the
  QScriptContext associated with the invocation to determine the
  actual number of arguments passed.

  A \c{prototype} property is automatically created for the resulting
  function object, to provide for the possibility that the function
  will be used as a constructor.

  By combining newFunction() and the property flags
  QScriptValue::PropertyGetter and QScriptValue::PropertySetter, you
  can create script object properties that behave like normal
  properties in script code, but are in fact accessed through
  functions (analogous to how properties work in \l{Qt's Property
  System}). Example:

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 11

  When the property \c{foo} of the script object is subsequently
  accessed in script code, \c{getSetFoo()} will be invoked to handle
  the access.  In this particular case, we chose to store the "real"
  value of \c{foo} as a property of the accessor function itself; you
  are of course free to do whatever you like in this function.

  In the above example, a single native function was used to handle
  both reads and writes to the property; the argument count is used to
  determine if we are handling a read or write. You can also use two
  separate functions; just specify the relevant flag
  (QScriptValue::PropertyGetter or QScriptValue::PropertySetter) when
  setting the property, e.g.:

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 12

  \sa QScriptValue::call()
*/
QScriptValue QScriptEngine::newFunction(QScriptEngine::FunctionSignature fun, int length)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    JSC::ExecState* exec = d->currentFrame;
    JSC::JSValue function = new (exec)QScript::FunctionWrapper(exec, length, JSC::Identifier(exec, ""), fun);
    QScriptValue result = d->scriptValueFromJSCValue(function);
    QScriptValue proto = newObject();
    result.setProperty(QLatin1String("prototype"), proto, QScriptValue::Undeletable);
    proto.setProperty(QLatin1String("constructor"), result,
                      QScriptValue::Undeletable | QScriptValue::SkipInEnumeration);
    return result;
}

/*!
  \internal
  \since 4.4
*/
QScriptValue QScriptEngine::newFunction(QScriptEngine::FunctionWithArgSignature fun, void *arg)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    JSC::ExecState* exec = d->currentFrame;
    JSC::JSValue function = new (exec)QScript::FunctionWithArgWrapper(exec, /*length=*/0, JSC::Identifier(exec, ""), fun, arg);
    QScriptValue result = d->scriptValueFromJSCValue(function);
    QScriptValue proto = newObject();
    result.setProperty(QLatin1String("prototype"), proto, QScriptValue::Undeletable);
    proto.setProperty(QLatin1String("constructor"), result,
                      QScriptValue::Undeletable | QScriptValue::SkipInEnumeration);
    return result;
}

/*!
  Creates a QtScript object of class Array with the given \a length.

  \sa newObject()
*/
QScriptValue QScriptEngine::newArray(uint length)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    return d->scriptValueFromJSCValue(d->newArray(d->currentFrame, length));
}

/*!
  Creates a QtScript object of class RegExp with the given
  \a pattern and \a flags.

  The legal flags are 'g' (global), 'i' (ignore case), and 'm'
  (multiline).
*/
QScriptValue QScriptEngine::newRegExp(const QString &pattern, const QString &flags)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    return d->scriptValueFromJSCValue(d->newRegExp(d->currentFrame, pattern, flags));
}

/*!
  Creates a QtScript object of class Date with the given
  \a value (the number of milliseconds since 01 January 1970,
  UTC).
*/
QScriptValue QScriptEngine::newDate(qsreal value)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    return d->scriptValueFromJSCValue(d->newDate(d->currentFrame, value));
}

/*!
  Creates a QtScript object of class Date from the given \a value.

  \sa QScriptValue::toDateTime()
*/
QScriptValue QScriptEngine::newDate(const QDateTime &value)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    return d->scriptValueFromJSCValue(d->newDate(d->currentFrame, value));
}

#ifndef QT_NO_QOBJECT
/*!
  Creates a QtScript object that represents a QObject class, using the
  the given \a metaObject and constructor \a ctor.

  Enums of \a metaObject (declared with Q_ENUMS) are available as
  properties of the created QScriptValue. When the class is called as
  a function, \a ctor will be called to create a new instance of the
  class.

  Example:

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 27

  \sa newQObject(), scriptValueFromQMetaObject()
*/
QScriptValue QScriptEngine::newQMetaObject(
    const QMetaObject *metaObject, const QScriptValue &ctor)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    JSC::JSValue jscCtor = d->scriptValueToJSCValue(ctor);
    JSC::JSValue jscQMetaObject = d->newQMetaObject(metaObject, jscCtor);
    return d->scriptValueFromJSCValue(jscQMetaObject);
}

/*!
  \fn QScriptValue QScriptEngine::scriptValueFromQMetaObject()

  Creates a QScriptValue that represents the Qt class \c{T}.

  This function is used in combination with one of the
  Q_SCRIPT_DECLARE_QMETAOBJECT() macro. Example:

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 13

  \warning This function is not available with MSVC 6. Use
  qScriptValueFromQMetaObject() instead if you need to support that version
  of the compiler.

  \sa QScriptEngine::newQMetaObject()
*/

/*!
  \fn QScriptValue qScriptValueFromQMetaObject(QScriptEngine *engine)
  \since 4.3
  \relates QScriptEngine

  Uses \a engine to create a QScriptValue that represents the Qt class
  \c{T}.

  This function is equivalent to
  QScriptEngine::scriptValueFromQMetaObject(). It is provided as a
  work-around for MSVC 6, which doesn't support member template
  functions.

  \sa QScriptEngine::newQMetaObject()
*/
#endif // QT_NO_QOBJECT

/*!
  \obsolete

  Returns true if \a program can be evaluated; i.e. the code is
  sufficient to determine whether it appears to be a syntactically
  correct program, or contains a syntax error.

  This function returns false if \a program is incomplete; i.e. the
  input is syntactically correct up to the point where the input is
  terminated.

  Note that this function only does a static check of \a program;
  e.g. it does not check whether references to variables are
  valid, and so on.

  A typical usage of canEvaluate() is to implement an interactive
  interpreter for QtScript. The user is repeatedly queried for
  individual lines of code; the lines are concatened internally, and
  only when canEvaluate() returns true for the resulting program is it
  passed to evaluate().

  The following are some examples to illustrate the behavior of
  canEvaluate(). (Note that all example inputs are assumed to have an
  explicit newline as their last character, since otherwise the
  QtScript parser would automatically insert a semi-colon character at
  the end of the input, and this could cause canEvaluate() to produce
  different results.)

  Given the input
  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 14
  canEvaluate() will return true, since the program appears to be complete.

  Given the input
  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 15
  canEvaluate() will return false, since the if-statement is not complete,
  but is syntactically correct so far.

  Given the input
  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 16
  canEvaluate() will return true, but evaluate() will throw a
  SyntaxError given the same input.

  Given the input
  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 17
  canEvaluate() will return true, even though the code is clearly not
  syntactically valid QtScript code. evaluate() will throw a
  SyntaxError when this code is evaluated.

  Given the input
  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 18
  canEvaluate() will return true, but evaluate() will throw a
  ReferenceError if \c{foo} is not defined in the script
  environment.

  \sa evaluate(), checkSyntax()
*/
bool QScriptEngine::canEvaluate(const QString &program) const
{
    return QScriptEnginePrivate::canEvaluate(program);
}


bool QScriptEnginePrivate::canEvaluate(const QString &program)
{
    QScript::SyntaxChecker checker;
    QScript::SyntaxChecker::Result result = checker.checkSyntax(program);
    return (result.state != QScript::SyntaxChecker::Intermediate);
}

/*!
  \since 4.5

  Checks the syntax of the given \a program. Returns a
  QScriptSyntaxCheckResult object that contains the result of the check.
*/
QScriptSyntaxCheckResult QScriptEngine::checkSyntax(const QString &program)
{
    return QScriptEnginePrivate::checkSyntax(program);
}

QScriptSyntaxCheckResult QScriptEnginePrivate::checkSyntax(const QString &program)
{
    QScript::SyntaxChecker checker;
    QScript::SyntaxChecker::Result result = checker.checkSyntax(program);
    QScriptSyntaxCheckResultPrivate *p = new QScriptSyntaxCheckResultPrivate();
    switch (result.state) {
    case QScript::SyntaxChecker::Error:
        p->state = QScriptSyntaxCheckResult::Error;
        break;
    case QScript::SyntaxChecker::Intermediate:
        p->state = QScriptSyntaxCheckResult::Intermediate;
        break;
    case QScript::SyntaxChecker::Valid:
        p->state = QScriptSyntaxCheckResult::Valid;
        break;
    }
    p->errorLineNumber = result.errorLineNumber;
    p->errorColumnNumber = result.errorColumnNumber;
    p->errorMessage = result.errorMessage;
    return QScriptSyntaxCheckResult(p);
}



/*!
  Evaluates \a program, using \a lineNumber as the base line number,
  and returns the result of the evaluation.

  The script code will be evaluated in the current context.

  The evaluation of \a program can cause an exception in the
  engine; in this case the return value will be the exception
  that was thrown (typically an \c{Error} object). You can call
  hasUncaughtException() to determine if an exception occurred in
  the last call to evaluate().

  \a lineNumber is used to specify a starting line number for \a
  program; line number information reported by the engine that pertain
  to this evaluation (e.g. uncaughtExceptionLineNumber()) will be
  based on this argument. For example, if \a program consists of two
  lines of code, and the statement on the second line causes a script
  exception, uncaughtExceptionLineNumber() would return the given \a
  lineNumber plus one. When no starting line number is specified, line
  numbers will be 1-based.

  \a fileName is used for error reporting. For example in error objects
  the file name is accessible through the "fileName" property if it's
  provided with this function.

  \sa canEvaluate(), hasUncaughtException(), isEvaluating(), abortEvaluation()
*/

QScriptValue QScriptEngine::evaluate(const QString &program, const QString &fileName, int lineNumber)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    WTF::PassRefPtr<QScript::UStringSourceProviderWithFeedback> provider
            = QScript::UStringSourceProviderWithFeedback::create(program, fileName, lineNumber, d);
    intptr_t sourceId = provider->asID();
    JSC::SourceCode source(provider, lineNumber); //after construction of SourceCode provider variable will be null.

    JSC::ExecState* exec = d->currentFrame;
    WTF::RefPtr<JSC::EvalExecutable> executable = JSC::EvalExecutable::create(exec, source);
    bool compile = true;
    return d->scriptValueFromJSCValue(d->evaluateHelper(exec, sourceId, executable.get(), compile));
}

/*!
  \internal
  \since 4.6

  Evaluates the given \a program and returns the result of the
  evaluation.
*/
QScriptValue QScriptEngine::evaluate(const QScriptProgram &program)
{
    Q_D(QScriptEngine);
    QScriptProgramPrivate *program_d = QScriptProgramPrivate::get(program);
    if (!program_d)
        return QScriptValue();

    QScript::APIShim shim(d);
    JSC::ExecState* exec = d->currentFrame;
    JSC::EvalExecutable *executable = program_d->executable(exec, d);
    bool compile = !program_d->isCompiled;
    JSC::JSValue result = d->evaluateHelper(exec, program_d->sourceId,
                                            executable, compile);
    if (compile)
        program_d->isCompiled = true;
    return d->scriptValueFromJSCValue(result);
}

/*!
  Returns the current context.

  The current context is typically accessed to retrieve the arguments
  and `this' object in native functions; for convenience, it is
  available as the first argument in QScriptEngine::FunctionSignature.
*/
QScriptContext *QScriptEngine::currentContext() const
{
    Q_D(const QScriptEngine);
    return const_cast<QScriptEnginePrivate*>(d)->contextForFrame(d->currentFrame);
}

/*!
  Enters a new execution context and returns the associated
  QScriptContext object.

  Once you are done with the context, you should call popContext() to
  restore the old context.

  By default, the `this' object of the new context is the Global Object.
  The context's \l{QScriptContext::callee()}{callee}() will be invalid.

  This function is useful when you want to evaluate script code
  as if it were the body of a function. You can use the context's
  \l{QScriptContext::activationObject()}{activationObject}() to initialize
  local variables that will be available to scripts. Example:

  \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 19

  In the above example, the new variable "tmp" defined in the script
  will be local to the context; in other words, the script doesn't
  have any effect on the global environment.

  Returns 0 in case of stack overflow

  \sa popContext()
*/
QScriptContext *QScriptEngine::pushContext()
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);

    JSC::CallFrame* newFrame = d->pushContext(d->currentFrame, d->currentFrame->globalData().dynamicGlobalObject,
                                              JSC::ArgList(), /*callee = */0);

    if (agent())
        agent()->contextPush();

    return d->contextForFrame(newFrame);
}

/*! \internal
   push a context for a native function.
   JSC native function doesn't have different stackframe or context. so we need to create one.

   use popContext right after to go back to the previous context the context if no stack overflow has hapenned

   exec is the current top frame.

   return the new top frame. (might be the same as exec if a new stackframe was not needed) or 0 if stack overflow
*/
JSC::CallFrame *QScriptEnginePrivate::pushContext(JSC::CallFrame *exec, JSC::JSValue _thisObject,
                                                  const JSC::ArgList& args, JSC::JSObject *callee, bool calledAsConstructor,
                                                  bool clearScopeChain)
{
    JSC::JSValue thisObject = _thisObject;
    if (calledAsConstructor) {
        //JSC doesn't create default created object for native functions. so we do it
        JSC::JSValue prototype = callee->get(exec, exec->propertyNames().prototype);
        JSC::Structure *structure = prototype.isObject() ? JSC::asObject(prototype)->inheritorID()
                                                         : originalGlobalObject()->emptyObjectStructure();
        thisObject = new (exec) QScriptObject(structure);
    }

    int flags = NativeContext;
    if (calledAsConstructor)
        flags |= CalledAsConstructorContext;

    //build a frame
    JSC::CallFrame *newCallFrame = exec;
    if (callee == 0 //called from  public QScriptEngine::pushContext
        || exec->returnPC() == 0 || (contextFlags(exec) & NativeContext) //called from native-native call
        || (exec->codeBlock() && exec->callee() != callee)) { //the interpreter did not build a frame for us.
        //We need to check if the Interpreter might have already created a frame for function called from JS.
        JSC::Interpreter *interp = exec->interpreter();
        JSC::Register *oldEnd = interp->registerFile().end();
        int argc = args.size() + 1; //add "this"
        JSC::Register *newEnd = oldEnd + argc + JSC::RegisterFile::CallFrameHeaderSize;
        if (!interp->registerFile().grow(newEnd))
            return 0; //### Stack overflow
        newCallFrame = JSC::CallFrame::create(oldEnd);
        newCallFrame[0] = thisObject;
        int dst = 0;
        JSC::ArgList::const_iterator it;
        for (it = args.begin(); it != args.end(); ++it)
            newCallFrame[++dst] = *it;
        newCallFrame += argc + JSC::RegisterFile::CallFrameHeaderSize;

        if (!clearScopeChain) {
            newCallFrame->init(0, /*vPC=*/0, exec->scopeChain(), exec, flags | ShouldRestoreCallFrame, argc, callee);
        } else {
            JSC::JSObject *jscObject = originalGlobalObject();
            JSC::ScopeChainNode *scn = new JSC::ScopeChainNode(0, jscObject, &exec->globalData(), exec->lexicalGlobalObject(), jscObject);
            newCallFrame->init(0, /*vPC=*/0, scn, exec, flags | ShouldRestoreCallFrame, argc, callee);
        }
    } else {
        setContextFlags(newCallFrame, flags);
#if ENABLE(JIT)
        exec->registers()[JSC::RegisterFile::Callee] = JSC::JSValue(callee); //JIT let the callee set the 'callee'
#endif
        if (calledAsConstructor) {
            //update the new created this
            JSC::Register* thisRegister = thisRegisterForFrame(newCallFrame);
            *thisRegister = thisObject;
        }
    }
    currentFrame = newCallFrame;
    return newCallFrame;
}


/*!
  Pops the current execution context and restores the previous one.
  This function must be used in conjunction with pushContext().

  \sa pushContext()
*/
void QScriptEngine::popContext()
{
    if (agent())
        agent()->contextPop();
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    if (d->currentFrame->returnPC() != 0 || d->currentFrame->codeBlock() != 0
        || !currentContext()->parentContext()) {
        qWarning("QScriptEngine::popContext() doesn't match with pushContext()");
        return;
    }

    d->popContext();
}

/*! \internal
    counter part of QScriptEnginePrivate::pushContext
 */
void QScriptEnginePrivate::popContext()
{
    uint flags = contextFlags(currentFrame);
    bool hasScope = flags & HasScopeContext;
    if (flags & ShouldRestoreCallFrame) { //normal case
        JSC::RegisterFile &registerFile = currentFrame->interpreter()->registerFile();
        JSC::Register *const newEnd = currentFrame->registers() - JSC::RegisterFile::CallFrameHeaderSize - currentFrame->argumentCount();
        if (hasScope)
            currentFrame->scopeChain()->pop()->deref();
        registerFile.shrink(newEnd);
    } else if(hasScope) { //the stack frame was created by the Interpreter, we don't need to rewind it.
        currentFrame->setScopeChain(currentFrame->scopeChain()->pop());
        currentFrame->scopeChain()->deref();
    }
    currentFrame = currentFrame->callerFrame();
}

/*!
  Returns true if the last script evaluation resulted in an uncaught
  exception; otherwise returns false.

  The exception state is cleared when evaluate() is called.

  \sa uncaughtException(), uncaughtExceptionLineNumber(),
      uncaughtExceptionBacktrace()
*/
bool QScriptEngine::hasUncaughtException() const
{
    Q_D(const QScriptEngine);
    JSC::ExecState* exec = d->globalExec();
    return exec->hadException() || d->currentException().isValid();
}

/*!
  Returns the current uncaught exception, or an invalid QScriptValue
  if there is no uncaught exception.

  The exception value is typically an \c{Error} object; in that case,
  you can call toString() on the return value to obtain an error
  message.

  \sa hasUncaughtException(), uncaughtExceptionLineNumber(),
      uncaughtExceptionBacktrace()
*/
QScriptValue QScriptEngine::uncaughtException() const
{
    Q_D(const QScriptEngine);
    QScriptValue result;
    JSC::ExecState* exec = d->globalExec();
    if (exec->hadException())
        result = const_cast<QScriptEnginePrivate*>(d)->scriptValueFromJSCValue(exec->exception());
    else
        result = d->currentException();
    return result;
}

/*!
  Returns the line number where the last uncaught exception occurred.

  Line numbers are 1-based, unless a different base was specified as
  the second argument to evaluate().

  \sa hasUncaughtException(), uncaughtExceptionBacktrace()
*/
int QScriptEngine::uncaughtExceptionLineNumber() const
{
    if (!hasUncaughtException())
        return -1;
    return uncaughtException().property(QLatin1String("lineNumber")).toInt32();
}

/*!
  Returns a human-readable backtrace of the last uncaught exception.

  Each line is of the form \c{<function-name>(<arguments>)@<file-name>:<line-number>}.

  \sa uncaughtException()
*/
QStringList QScriptEngine::uncaughtExceptionBacktrace() const
{
    if (!hasUncaughtException())
        return QStringList();
// ### currently no way to get a full backtrace from JSC without installing a
// debugger that reimplements exception() and store the backtrace there.
    QScriptValue value = uncaughtException();
    if (!value.isError())
        return QStringList();
    QStringList result;
    result.append(QString::fromLatin1("<anonymous>()@%0:%1")
                  .arg(value.property(QLatin1String("fileName")).toString())
                  .arg(value.property(QLatin1String("lineNumber")).toInt32()));
    return result;
}

/*!
  \since 4.4

  Clears any uncaught exceptions in this engine.

  \sa hasUncaughtException()
*/
void QScriptEngine::clearExceptions()
{
    Q_D(QScriptEngine);
    JSC::ExecState* exec = d->currentFrame;
    exec->clearException();
    d->clearCurrentException();
}

/*!
  Returns the default prototype associated with the given \a metaTypeId,
  or an invalid QScriptValue if no default prototype has been set.

  \sa setDefaultPrototype()
*/
QScriptValue QScriptEngine::defaultPrototype(int metaTypeId) const
{
    Q_D(const QScriptEngine);
    return const_cast<QScriptEnginePrivate*>(d)->scriptValueFromJSCValue(d->defaultPrototype(metaTypeId));
}

/*!
  Sets the default prototype of the C++ type identified by the given
  \a metaTypeId to \a prototype.

  The default prototype provides a script interface for values of
  type \a metaTypeId when a value of that type is accessed from script
  code.  Whenever the script engine (implicitly or explicitly) creates
  a QScriptValue from a value of type \a metaTypeId, the default
  prototype will be set as the QScriptValue's prototype.

  The \a prototype object itself may be constructed using one of two
  principal techniques; the simplest is to subclass QScriptable, which
  enables you to define the scripting API of the type through QObject
  properties and slots.  Another possibility is to create a script
  object by calling newObject(), and populate the object with the
  desired properties (e.g. native functions wrapped with
  newFunction()).

  \sa defaultPrototype(), qScriptRegisterMetaType(), QScriptable, {Default Prototypes Example}
*/
void QScriptEngine::setDefaultPrototype(int metaTypeId, const QScriptValue &prototype)
{
    Q_D(QScriptEngine);
    d->setDefaultPrototype(metaTypeId, d->scriptValueToJSCValue(prototype));
}

/*!
  \typedef QScriptEngine::FunctionSignature
  \relates QScriptEngine

  The function signature \c{QScriptValue f(QScriptContext *, QScriptEngine *)}.

  A function with such a signature can be passed to
  QScriptEngine::newFunction() to wrap the function.
*/

/*!
  \typedef QScriptEngine::FunctionWithArgSignature
  \relates QScriptEngine

  The function signature \c{QScriptValue f(QScriptContext *, QScriptEngine *, void *)}.

  A function with such a signature can be passed to
  QScriptEngine::newFunction() to wrap the function.
*/

/*!
    \typedef QScriptEngine::MarshalFunction
    \internal
*/

/*!
    \typedef QScriptEngine::DemarshalFunction
    \internal
*/

/*!
    \internal
*/
QScriptValue QScriptEngine::create(int type, const void *ptr)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    return d->scriptValueFromJSCValue(d->create(d->currentFrame, type, ptr));
}

JSC::JSValue QScriptEnginePrivate::create(JSC::ExecState *exec, int type, const void *ptr)
{
    Q_ASSERT(ptr != 0);
    JSC::JSValue result;
    QScriptEnginePrivate *eng = exec ? QScript::scriptEngineFromExec(exec) : 0;
    QScriptTypeInfo *info = eng ? eng->m_typeInfos.value(type) : 0;
    if (info && info->marshal) {
        result = eng->scriptValueToJSCValue(info->marshal(eng->q_func(), ptr));
    } else {
        // check if it's one of the types we know
        switch (QMetaType::Type(type)) {
        case QMetaType::Void:
            return JSC::jsUndefined();
        case QMetaType::Bool:
            return JSC::jsBoolean(*reinterpret_cast<const bool*>(ptr));
        case QMetaType::Int:
            return JSC::jsNumber(exec, *reinterpret_cast<const int*>(ptr));
        case QMetaType::UInt:
            return JSC::jsNumber(exec, *reinterpret_cast<const uint*>(ptr));
        case QMetaType::LongLong:
            return JSC::jsNumber(exec, qsreal(*reinterpret_cast<const qlonglong*>(ptr)));
        case QMetaType::ULongLong:
#if defined(Q_OS_WIN) && defined(_MSC_FULL_VER) && _MSC_FULL_VER <= 12008804
#pragma message("** NOTE: You need the Visual Studio Processor Pack to compile support for 64bit unsigned integers.")
            return JSC::jsNumber(exec, qsreal((qlonglong)*reinterpret_cast<const qulonglong*>(ptr)));
#elif defined(Q_CC_MSVC) && !defined(Q_CC_MSVC_NET)
            return JSC::jsNumber(exec, qsreal((qlonglong)*reinterpret_cast<const qulonglong*>(ptr)));
#else
            return JSC::jsNumber(exec, qsreal(*reinterpret_cast<const qulonglong*>(ptr)));
#endif
        case QMetaType::Double:
            return JSC::jsNumber(exec, qsreal(*reinterpret_cast<const double*>(ptr)));
        case QMetaType::QString:
            return JSC::jsString(exec, *reinterpret_cast<const QString*>(ptr));
        case QMetaType::Float:
            return JSC::jsNumber(exec, *reinterpret_cast<const float*>(ptr));
        case QMetaType::Short:
            return JSC::jsNumber(exec, *reinterpret_cast<const short*>(ptr));
        case QMetaType::UShort:
            return JSC::jsNumber(exec, *reinterpret_cast<const unsigned short*>(ptr));
        case QMetaType::Char:
            return JSC::jsNumber(exec, *reinterpret_cast<const char*>(ptr));
        case QMetaType::UChar:
            return JSC::jsNumber(exec, *reinterpret_cast<const unsigned char*>(ptr));
        case QMetaType::QChar:
            return JSC::jsNumber(exec, (*reinterpret_cast<const QChar*>(ptr)).unicode());
        case QMetaType::QStringList:
            result = arrayFromStringList(exec, *reinterpret_cast<const QStringList *>(ptr));
            break;
        case QMetaType::QVariantList:
            result = arrayFromVariantList(exec, *reinterpret_cast<const QVariantList *>(ptr));
            break;
        case QMetaType::QVariantMap:
            result = objectFromVariantMap(exec, *reinterpret_cast<const QVariantMap *>(ptr));
            break;
        case QMetaType::QDateTime:
            result = newDate(exec, *reinterpret_cast<const QDateTime *>(ptr));
            break;
        case QMetaType::QDate:
            result = newDate(exec, QDateTime(*reinterpret_cast<const QDate *>(ptr)));
            break;
#ifndef QT_NO_REGEXP
        case QMetaType::QRegExp:
            result = newRegExp(exec, *reinterpret_cast<const QRegExp *>(ptr));
            break;
#endif
#ifndef QT_NO_QOBJECT
        case QMetaType::QObjectStar:
        case QMetaType::QWidgetStar:
            result = eng->newQObject(*reinterpret_cast<QObject* const *>(ptr));
            break;
#endif
        case QMetaType::QVariant:
            result = jscValueFromVariant(exec, *reinterpret_cast<const QVariant*>(ptr));
            break;
        default:
            if (type == qMetaTypeId<QScriptValue>()) {
                result = eng->scriptValueToJSCValue(*reinterpret_cast<const QScriptValue*>(ptr));
                if (!result)
                    return JSC::jsUndefined();
            }

#ifndef QT_NO_QOBJECT
            // lazy registration of some common list types
            else if (type == qMetaTypeId<QObjectList>()) {
                qScriptRegisterSequenceMetaType<QObjectList>(eng->q_func());
                return create(exec, type, ptr);
            }
#endif
            else if (type == qMetaTypeId<QList<int> >()) {
                qScriptRegisterSequenceMetaType<QList<int> >(eng->q_func());
                return create(exec, type, ptr);
            }

            else {
                QByteArray typeName = QMetaType::typeName(type);
                if (typeName.endsWith('*') && !*reinterpret_cast<void* const *>(ptr))
                    return JSC::jsNull();
                else
                    result = eng->newVariant(QVariant(type, ptr));
            }
        }
    }
    if (result && result.isObject() && info && info->prototype
        && JSC::JSValue::strictEqual(exec, JSC::asObject(result)->prototype(), eng->originalGlobalObject()->objectPrototype())) {
        JSC::asObject(result)->setPrototype(info->prototype);
    }
    return result;
}

bool QScriptEnginePrivate::convertValue(JSC::ExecState *exec, JSC::JSValue value,
                                        int type, void *ptr)
{
    QScriptEnginePrivate *eng = exec ? QScript::scriptEngineFromExec(exec) : 0;
    if (eng) {
        QScriptTypeInfo *info = eng->m_typeInfos.value(type);
        if (info && info->demarshal) {
            info->demarshal(eng->scriptValueFromJSCValue(value), ptr);
            return true;
        }
    }

    // check if it's one of the types we know
    switch (QMetaType::Type(type)) {
    case QMetaType::Bool:
        *reinterpret_cast<bool*>(ptr) = toBool(exec, value);
        return true;
    case QMetaType::Int:
        *reinterpret_cast<int*>(ptr) = toInt32(exec, value);
        return true;
    case QMetaType::UInt:
        *reinterpret_cast<uint*>(ptr) = toUInt32(exec, value);
        return true;
    case QMetaType::LongLong:
        *reinterpret_cast<qlonglong*>(ptr) = qlonglong(toInteger(exec, value));
        return true;
    case QMetaType::ULongLong:
        *reinterpret_cast<qulonglong*>(ptr) = qulonglong(toInteger(exec, value));
        return true;
    case QMetaType::Double:
        *reinterpret_cast<double*>(ptr) = toNumber(exec, value);
        return true;
    case QMetaType::QString:
        if (value.isUndefined() || value.isNull())
            *reinterpret_cast<QString*>(ptr) = QString();
        else
            *reinterpret_cast<QString*>(ptr) = toString(exec, value);
        return true;
    case QMetaType::Float:
        *reinterpret_cast<float*>(ptr) = toNumber(exec, value);
        return true;
    case QMetaType::Short:
        *reinterpret_cast<short*>(ptr) = short(toInt32(exec, value));
        return true;
    case QMetaType::UShort:
        *reinterpret_cast<unsigned short*>(ptr) = QScript::ToUInt16(toNumber(exec, value));
        return true;
    case QMetaType::Char:
        *reinterpret_cast<char*>(ptr) = char(toInt32(exec, value));
        return true;
    case QMetaType::UChar:
        *reinterpret_cast<unsigned char*>(ptr) = (unsigned char)(toInt32(exec, value));
        return true;
    case QMetaType::QChar:
        if (value.isString()) {
            QString str = toString(exec, value);
            *reinterpret_cast<QChar*>(ptr) = str.isEmpty() ? QChar() : str.at(0);
        } else {
            *reinterpret_cast<QChar*>(ptr) = QChar(QScript::ToUInt16(toNumber(exec, value)));
        }
        return true;
    case QMetaType::QDateTime:
        if (isDate(value)) {
            *reinterpret_cast<QDateTime *>(ptr) = toDateTime(exec, value);
            return true;
        } break;
    case QMetaType::QDate:
        if (isDate(value)) {
            *reinterpret_cast<QDate *>(ptr) = toDateTime(exec, value).date();
            return true;
        } break;
#ifndef QT_NO_REGEXP
    case QMetaType::QRegExp:
        if (isRegExp(value)) {
            *reinterpret_cast<QRegExp *>(ptr) = toRegExp(exec, value);
            return true;
        } break;
#endif
#ifndef QT_NO_QOBJECT
    case QMetaType::QObjectStar:
        if (isQObject(value) || value.isNull()) {
            *reinterpret_cast<QObject* *>(ptr) = toQObject(exec, value);
            return true;
        } break;
    case QMetaType::QWidgetStar:
        if (isQObject(value) || value.isNull()) {
            QObject *qo = toQObject(exec, value);
            if (!qo || qo->isWidgetType()) {
                *reinterpret_cast<QWidget* *>(ptr) = reinterpret_cast<QWidget*>(qo);
                return true;
            }
        } break;
#endif
    case QMetaType::QStringList:
        if (isArray(value)) {
            *reinterpret_cast<QStringList *>(ptr) = stringListFromArray(exec, value);
            return true;
        } break;
    case QMetaType::QVariantList:
        if (isArray(value)) {
            *reinterpret_cast<QVariantList *>(ptr) = variantListFromArray(exec, JSC::asArray(value));
            return true;
        } break;
    case QMetaType::QVariantMap:
        if (isObject(value)) {
            *reinterpret_cast<QVariantMap *>(ptr) = variantMapFromObject(exec, JSC::asObject(value));
            return true;
        } break;
    case QMetaType::QVariant:
        *reinterpret_cast<QVariant*>(ptr) = toVariant(exec, value);
        return true;
    default:
    ;
    }

    QByteArray name = QMetaType::typeName(type);
#ifndef QT_NO_QOBJECT
    if (convertToNativeQObject(exec, value, name, reinterpret_cast<void* *>(ptr)))
        return true;
#endif
    if (isVariant(value) && name.endsWith('*')) {
        int valueType = QMetaType::type(name.left(name.size()-1));
        QVariant &var = variantValue(value);
        if (valueType == var.userType()) {
            *reinterpret_cast<void* *>(ptr) = var.data();
            return true;
        } else {
            // look in the prototype chain
            JSC::JSValue proto = JSC::asObject(value)->prototype();
            while (proto.isObject()) {
                bool canCast = false;
                if (isVariant(proto)) {
                    canCast = (type == variantValue(proto).userType())
                              || (valueType && (valueType == variantValue(proto).userType()));
                }
#ifndef QT_NO_QOBJECT
                else if (isQObject(proto)) {
                    QByteArray className = name.left(name.size()-1);
                    if (QObject *qobject = toQObject(exec, proto))
                        canCast = qobject->qt_metacast(className) != 0;
                }
#endif
                if (canCast) {
                    QByteArray varTypeName = QMetaType::typeName(var.userType());
                    if (varTypeName.endsWith('*'))
                        *reinterpret_cast<void* *>(ptr) = *reinterpret_cast<void* *>(var.data());
                    else
                        *reinterpret_cast<void* *>(ptr) = var.data();
                    return true;
                }
                proto = JSC::asObject(proto)->prototype();
            }
        }
    } else if (value.isNull() && name.endsWith('*')) {
        *reinterpret_cast<void* *>(ptr) = 0;
        return true;
    } else if (type == qMetaTypeId<QScriptValue>()) {
        if (!eng)
            return false;
        *reinterpret_cast<QScriptValue*>(ptr) = eng->scriptValueFromJSCValue(value);
        return true;
    }

    // lazy registration of some common list types
#ifndef QT_NO_QOBJECT
    else if (type == qMetaTypeId<QObjectList>()) {
        if (!eng)
            return false;
        qScriptRegisterSequenceMetaType<QObjectList>(eng->q_func());
        return convertValue(exec, value, type, ptr);
    }
#endif
    else if (type == qMetaTypeId<QList<int> >()) {
        if (!eng)
            return false;
        qScriptRegisterSequenceMetaType<QList<int> >(eng->q_func());
        return convertValue(exec, value, type, ptr);
    }

#if 0
    if (!name.isEmpty()) {
        qWarning("QScriptEngine::convert: unable to convert value to type `%s'",
                 name.constData());
    }
#endif
    return false;
}

bool QScriptEnginePrivate::convertNumber(qsreal value, int type, void *ptr)
{
    switch (QMetaType::Type(type)) {
    case QMetaType::Bool:
        *reinterpret_cast<bool*>(ptr) = QScript::ToBool(value);
        return true;
    case QMetaType::Int:
        *reinterpret_cast<int*>(ptr) = QScript::ToInt32(value);
        return true;
    case QMetaType::UInt:
        *reinterpret_cast<uint*>(ptr) = QScript::ToUInt32(value);
        return true;
    case QMetaType::LongLong:
        *reinterpret_cast<qlonglong*>(ptr) = qlonglong(QScript::ToInteger(value));
        return true;
    case QMetaType::ULongLong:
        *reinterpret_cast<qulonglong*>(ptr) = qulonglong(QScript::ToInteger(value));
        return true;
    case QMetaType::Double:
        *reinterpret_cast<double*>(ptr) = value;
        return true;
    case QMetaType::QString:
        *reinterpret_cast<QString*>(ptr) = QScript::ToString(value);
        return true;
    case QMetaType::Float:
        *reinterpret_cast<float*>(ptr) = value;
        return true;
    case QMetaType::Short:
        *reinterpret_cast<short*>(ptr) = short(QScript::ToInt32(value));
        return true;
    case QMetaType::UShort:
        *reinterpret_cast<unsigned short*>(ptr) = QScript::ToUInt16(value);
        return true;
    case QMetaType::Char:
        *reinterpret_cast<char*>(ptr) = char(QScript::ToInt32(value));
        return true;
    case QMetaType::UChar:
        *reinterpret_cast<unsigned char*>(ptr) = (unsigned char)(QScript::ToInt32(value));
        return true;
    case QMetaType::QChar:
        *reinterpret_cast<QChar*>(ptr) = QChar(QScript::ToUInt16(value));
        return true;
    default:
        break;
    }
    return false;
}

bool QScriptEnginePrivate::convertString(const QString &value, int type, void *ptr)
{
    switch (QMetaType::Type(type)) {
    case QMetaType::Bool:
        *reinterpret_cast<bool*>(ptr) = QScript::ToBool(value);
        return true;
    case QMetaType::Int:
        *reinterpret_cast<int*>(ptr) = QScript::ToInt32(value);
        return true;
    case QMetaType::UInt:
        *reinterpret_cast<uint*>(ptr) = QScript::ToUInt32(value);
        return true;
    case QMetaType::LongLong:
        *reinterpret_cast<qlonglong*>(ptr) = qlonglong(QScript::ToInteger(value));
        return true;
    case QMetaType::ULongLong:
        *reinterpret_cast<qulonglong*>(ptr) = qulonglong(QScript::ToInteger(value));
        return true;
    case QMetaType::Double:
        *reinterpret_cast<double*>(ptr) = QScript::ToNumber(value);
        return true;
    case QMetaType::QString:
        *reinterpret_cast<QString*>(ptr) = value;
        return true;
    case QMetaType::Float:
        *reinterpret_cast<float*>(ptr) = QScript::ToNumber(value);
        return true;
    case QMetaType::Short:
        *reinterpret_cast<short*>(ptr) = short(QScript::ToInt32(value));
        return true;
    case QMetaType::UShort:
        *reinterpret_cast<unsigned short*>(ptr) = QScript::ToUInt16(value);
        return true;
    case QMetaType::Char:
        *reinterpret_cast<char*>(ptr) = char(QScript::ToInt32(value));
        return true;
    case QMetaType::UChar:
        *reinterpret_cast<unsigned char*>(ptr) = (unsigned char)(QScript::ToInt32(value));
        return true;
    case QMetaType::QChar:
        *reinterpret_cast<QChar*>(ptr) = QChar(QScript::ToUInt16(value));
        return true;
    default:
        break;
    }
    return false;
}

bool QScriptEnginePrivate::hasDemarshalFunction(int type) const
{
    QScriptTypeInfo *info = m_typeInfos.value(type);
    return info && (info->demarshal != 0);
}

JSC::UString QScriptEnginePrivate::translationContextFromUrl(const JSC::UString &url)
{
    if (url != cachedTranslationUrl) {
        cachedTranslationContext = QFileInfo(url).baseName();
        cachedTranslationUrl = url;
    }
    return cachedTranslationContext;
}

/*!
    \internal
*/
bool QScriptEngine::convert(const QScriptValue &value, int type, void *ptr)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    return QScriptEnginePrivate::convertValue(d->currentFrame, d->scriptValueToJSCValue(value), type, ptr);
}

/*!
    \internal
*/
bool QScriptEngine::convertV2(const QScriptValue &value, int type, void *ptr)
{
    QScriptValuePrivate *vp = QScriptValuePrivate::get(value);
    if (vp) {
        switch (vp->type) {
        case QScriptValuePrivate::JavaScriptCore: {
            if (vp->engine) {
                QScript::APIShim shim(vp->engine);
                return QScriptEnginePrivate::convertValue(vp->engine->currentFrame, vp->jscValue, type, ptr);
            } else {
                return QScriptEnginePrivate::convertValue(0, vp->jscValue, type, ptr);
            }
        }
        case QScriptValuePrivate::Number:
            return QScriptEnginePrivate::convertNumber(vp->numberValue, type, ptr);
        case QScriptValuePrivate::String:
            return QScriptEnginePrivate::convertString(vp->stringValue, type, ptr);
        }
    }
    return false;
}

/*!
    \internal
*/
void QScriptEngine::registerCustomType(int type, MarshalFunction mf,
                                       DemarshalFunction df,
                                       const QScriptValue &prototype)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    QScriptTypeInfo *info = d->m_typeInfos.value(type);
    if (!info) {
        info = new QScriptTypeInfo();
        d->m_typeInfos.insert(type, info);
    }
    info->marshal = mf;
    info->demarshal = df;
    info->prototype = d->scriptValueToJSCValue(prototype);
}

/*!
  \since 4.5

  Installs translator functions on the given \a object, or on the Global
  Object if no object is specified.

  The relation between Qt Script translator functions and C++ translator
  functions is described in the following table:

    \table
    \header \o Script Function \o Corresponding C++ Function
    \row    \o qsTr()       \o QObject::tr()
    \row    \o QT_TR_NOOP() \o QT_TR_NOOP()
    \row    \o qsTranslate() \o QCoreApplication::translate()
    \row    \o QT_TRANSLATE_NOOP() \o QT_TRANSLATE_NOOP()
    \endtable

  \sa {Internationalization with Qt}
*/
void QScriptEngine::installTranslatorFunctions(const QScriptValue &object)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    JSC::ExecState* exec = d->currentFrame;
    JSC::JSValue jscObject = d->scriptValueToJSCValue(object);
    JSC::JSGlobalObject *glob = d->originalGlobalObject();
    if (!jscObject || !jscObject.isObject())
        jscObject = d->globalObject();
//    unsigned attribs = JSC::DontEnum;
    JSC::asObject(jscObject)->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, glob->prototypeFunctionStructure(), 5, JSC::Identifier(exec, "qsTranslate"), QScript::functionQsTranslate));
    JSC::asObject(jscObject)->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, glob->prototypeFunctionStructure(), 2, JSC::Identifier(exec, "QT_TRANSLATE_NOOP"), QScript::functionQsTranslateNoOp));
    JSC::asObject(jscObject)->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, glob->prototypeFunctionStructure(), 3, JSC::Identifier(exec, "qsTr"), QScript::functionQsTr));
    JSC::asObject(jscObject)->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, glob->prototypeFunctionStructure(), 1, JSC::Identifier(exec, "QT_TR_NOOP"), QScript::functionQsTrNoOp));

    glob->stringPrototype()->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, glob->prototypeFunctionStructure(), 1, JSC::Identifier(exec, "arg"), QScript::stringProtoFuncArg));
}

/*!
    Imports the given \a extension into this QScriptEngine.  Returns
    undefinedValue() if the extension was successfully imported. You
    can call hasUncaughtException() to check if an error occurred; in
    that case, the return value is the value that was thrown by the
    exception (usually an \c{Error} object).

    QScriptEngine ensures that a particular extension is only imported
    once; subsequent calls to importExtension() with the same extension
    name will do nothing and return undefinedValue().

    \sa availableExtensions(), QScriptExtensionPlugin, {Creating QtScript Extensions}
*/
QScriptValue QScriptEngine::importExtension(const QString &extension)
{
#if defined(QT_NO_QOBJECT) || defined(QT_NO_LIBRARY) || defined(QT_NO_SETTINGS)
    Q_UNUSED(extension);
#else
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    if (d->importedExtensions.contains(extension))
        return undefinedValue(); // already imported

    QScriptContext *context = currentContext();
    QCoreApplication *app = QCoreApplication::instance();
    if (!app)
        return context->throwError(QLatin1String("No application object"));

    QObjectList staticPlugins = QPluginLoader::staticInstances();
    QStringList libraryPaths = app->libraryPaths();
    QString dot = QLatin1String(".");
    QStringList pathComponents = extension.split(dot);
    QString initDotJs = QLatin1String("__init__.js");

    QString ext;
    for (int i = 0; i < pathComponents.count(); ++i) {
        if (!ext.isEmpty())
            ext.append(dot);
        ext.append(pathComponents.at(i));
        if (d->importedExtensions.contains(ext))
            continue; // already imported

        if (d->extensionsBeingImported.contains(ext)) {
            return context->throwError(QString::fromLatin1("recursive import of %0")
                                       .arg(extension));
        }
        d->extensionsBeingImported.insert(ext);

        QScriptExtensionInterface *iface = 0;
        QString initjsContents;
        QString initjsFileName;

        // look for the extension in static plugins
        for (int j = 0; j < staticPlugins.size(); ++j) {
            iface = qobject_cast<QScriptExtensionInterface*>(staticPlugins.at(j));
            if (!iface)
                continue;
            if (iface->keys().contains(ext))
                break; // use this one
            else
                iface = 0; // keep looking
        }

        {
            // look for __init__.js resource
            QString path = QString::fromLatin1(":/qtscriptextension");
            for (int j = 0; j <= i; ++j) {
                path.append(QLatin1Char('/'));
                path.append(pathComponents.at(j));
            }
            path.append(QLatin1Char('/'));
            path.append(initDotJs);
            QFile file(path);
            if (file.open(QIODevice::ReadOnly)) {
                QTextStream ts(&file);
                initjsContents = ts.readAll();
                initjsFileName = path;
                file.close();
            }
        }

        if (!iface && initjsContents.isEmpty()) {
            // look for the extension in library paths
            for (int j = 0; j < libraryPaths.count(); ++j) {
                QString libPath = libraryPaths.at(j) + QDir::separator() + QLatin1String("script");
                QDir dir(libPath);
                if (!dir.exists(dot))
                    continue;

                // look for C++ plugin
                QFileInfoList files = dir.entryInfoList(QDir::Files);
                for (int k = 0; k < files.count(); ++k) {
                    QFileInfo entry = files.at(k);
                    QString filePath = entry.canonicalFilePath();
                    QPluginLoader loader(filePath);
                    iface = qobject_cast<QScriptExtensionInterface*>(loader.instance());
                    if (iface) {
                        if (iface->keys().contains(ext))
                            break; // use this one
                        else
                            iface = 0; // keep looking
                    }
                }

                // look for __init__.js in the corresponding dir
                QDir dirdir(libPath);
                bool dirExists = dirdir.exists();
                for (int k = 0; dirExists && (k <= i); ++k)
                    dirExists = dirdir.cd(pathComponents.at(k));
                if (dirExists && dirdir.exists(initDotJs)) {
                    QFile file(dirdir.canonicalPath()
                               + QDir::separator() + initDotJs);
                    if (file.open(QIODevice::ReadOnly)) {
                        QTextStream ts(&file);
                        initjsContents = ts.readAll();
                        initjsFileName = file.fileName();
                        file.close();
                    }
                }

                if (iface || !initjsContents.isEmpty())
                    break;
            }
        }

        if (!iface && initjsContents.isEmpty()) {
            d->extensionsBeingImported.remove(ext);
            return context->throwError(
                QString::fromLatin1("Unable to import %0: no such extension")
                .arg(extension));
        }

        // initialize the extension in a new context
        QScriptContext *ctx = pushContext();
        ctx->setThisObject(globalObject());
        ctx->activationObject().setProperty(QLatin1String("__extension__"), ext,
                                            QScriptValue::ReadOnly | QScriptValue::Undeletable);
        ctx->activationObject().setProperty(QLatin1String("__setupPackage__"),
                                            newFunction(QScript::__setupPackage__));
        ctx->activationObject().setProperty(QLatin1String("__postInit__"), QScriptValue(QScriptValue::UndefinedValue));

        // the script is evaluated first
        if (!initjsContents.isEmpty()) {
            QScriptValue ret = evaluate(initjsContents, initjsFileName);
            if (hasUncaughtException()) {
                popContext();
                d->extensionsBeingImported.remove(ext);
                return ret;
            }
        }

        // next, the C++ plugin is called
        if (iface) {
            iface->initialize(ext, this);
            if (hasUncaughtException()) {
                QScriptValue ret = uncaughtException(); // ctx_p->returnValue();
                popContext();
                d->extensionsBeingImported.remove(ext);
                return ret;
            }
        }

        // if the __postInit__ function has been set, we call it
        QScriptValue postInit = ctx->activationObject().property(QLatin1String("__postInit__"));
        if (postInit.isFunction()) {
            postInit.call(globalObject());
            if (hasUncaughtException()) {
                QScriptValue ret = uncaughtException(); // ctx_p->returnValue();
                popContext();
                d->extensionsBeingImported.remove(ext);
                return ret;
            }
        }

        popContext();

        d->importedExtensions.insert(ext);
        d->extensionsBeingImported.remove(ext);
    } // for (i)
#endif // QT_NO_QOBJECT
    return undefinedValue();
}

/*!
    \since 4.4

    Returns a list naming the available extensions that can be
    imported using the importExtension() function. This list includes
    extensions that have been imported.

    \sa importExtension(), importedExtensions()
*/
QStringList QScriptEngine::availableExtensions() const
{
#if defined(QT_NO_QOBJECT) || defined(QT_NO_LIBRARY) || defined(QT_NO_SETTINGS)
    return QStringList();
#else
    QCoreApplication *app = QCoreApplication::instance();
    if (!app)
        return QStringList();

    QSet<QString> result;

    QObjectList staticPlugins = QPluginLoader::staticInstances();
    for (int i = 0; i < staticPlugins.size(); ++i) {
        QScriptExtensionInterface *iface;
        iface = qobject_cast<QScriptExtensionInterface*>(staticPlugins.at(i));
        if (iface) {
            QStringList keys = iface->keys();
            for (int j = 0; j < keys.count(); ++j)
                result << keys.at(j);
        }
    }

    QStringList libraryPaths = app->libraryPaths();
    for (int i = 0; i < libraryPaths.count(); ++i) {
        QString libPath = libraryPaths.at(i) + QDir::separator() + QLatin1String("script");
        QDir dir(libPath);
        if (!dir.exists())
            continue;

        // look for C++ plugins
        QFileInfoList files = dir.entryInfoList(QDir::Files);
        for (int j = 0; j < files.count(); ++j) {
            QFileInfo entry = files.at(j);
            QString filePath = entry.canonicalFilePath();
            QPluginLoader loader(filePath);
            QScriptExtensionInterface *iface;
            iface = qobject_cast<QScriptExtensionInterface*>(loader.instance());
            if (iface) {
                QStringList keys = iface->keys();
                for (int k = 0; k < keys.count(); ++k)
                    result << keys.at(k);
            }
        }

        // look for scripts
        QString initDotJs = QLatin1String("__init__.js");
        QList<QFileInfo> stack;
        stack << dir.entryInfoList(QDir::Dirs | QDir::NoDotAndDotDot);
        while (!stack.isEmpty()) {
            QFileInfo entry = stack.takeLast();
            QDir dd(entry.canonicalFilePath());
            if (dd.exists(initDotJs)) {
                QString rpath = dir.relativeFilePath(dd.canonicalPath());
                QStringList components = rpath.split(QLatin1Char('/'));
                result << components.join(QLatin1String("."));
                stack << dd.entryInfoList(QDir::Dirs | QDir::NoDotAndDotDot);
            }
        }
    }

    QStringList lst = result.toList();
    qSort(lst);
    return lst;
#endif
}

/*!
    \since 4.4

    Returns a list naming the extensions that have been imported
    using the importExtension() function.

    \sa availableExtensions()
*/
QStringList QScriptEngine::importedExtensions() const
{
    Q_D(const QScriptEngine);
    QStringList lst = d->importedExtensions.toList();
    qSort(lst);
    return lst;
}

/*! \fn QScriptValue QScriptEngine::toScriptValue(const T &value)

    Creates a QScriptValue with the given \a value.

    Note that the template type \c{T} must be known to QMetaType.

    See \l{Conversion Between QtScript and C++ Types} for a
    description of the built-in type conversion provided by
    QtScript. By default, the types that are not specially handled by
    QtScript are represented as QVariants (e.g. the \a value is passed
    to newVariant()); you can change this behavior by installing your
    own type conversion functions with qScriptRegisterMetaType().

    \warning This function is not available with MSVC 6. Use
    qScriptValueFromValue() instead if you need to support that
    version of the compiler.

    \sa fromScriptValue(), qScriptRegisterMetaType()
*/

/*! \fn T QScriptEngine::fromScriptValue(const QScriptValue &value)

    Returns the given \a value converted to the template type \c{T}.

    Note that \c{T} must be known to QMetaType.

    See \l{Conversion Between QtScript and C++ Types} for a
    description of the built-in type conversion provided by
    QtScript.

    \warning This function is not available with MSVC 6. Use
    qScriptValueToValue() or qscriptvalue_cast() instead if you need
    to support that version of the compiler.

    \sa toScriptValue(), qScriptRegisterMetaType()
*/

/*!
    \fn QScriptValue qScriptValueFromValue(QScriptEngine *engine, const T &value)
    \since 4.3
    \relates QScriptEngine

    Creates a QScriptValue using the given \a engine with the given \a
    value of template type \c{T}.

    This function is equivalent to QScriptEngine::toScriptValue().
    It is provided as a work-around for MSVC 6, which doesn't support
    member template functions.

    \sa qScriptValueToValue()
*/

/*!
    \fn T qScriptValueToValue(const QScriptValue &value)
    \since 4.3
    \relates QScriptEngine

    Returns the given \a value converted to the template type \c{T}.

    This function is equivalent to QScriptEngine::fromScriptValue().
    It is provided as a work-around for MSVC 6, which doesn't
    support member template functions.

    \sa qScriptValueFromValue()
*/

/*!
    \fn QScriptValue qScriptValueFromSequence(QScriptEngine *engine, const Container &container)
    \since 4.3
    \relates QScriptEngine

    Creates an array in the form of a QScriptValue using the given \a engine
    with the given \a container of template type \c{Container}.

    The \c Container type must provide a \c const_iterator class to enable the
    contents of the container to be copied into the array.

    Additionally, the type of each element in the sequence should be
    suitable for conversion to a QScriptValue.  See
    \l{Conversion Between QtScript and C++ Types} for more information
    about the restrictions on types that can be used with QScriptValue.

    \sa qScriptValueFromValue()
*/

/*!
    \fn void qScriptValueToSequence(const QScriptValue &value, Container &container)
    \since 4.3
    \relates QScriptEngine

    Copies the elements in the sequence specified by \a value to the given
    \a container of template type \c{Container}.

    The \a value used is typically an array, but any container can be copied
    as long as it provides a \c length property describing how many elements
    it contains.

    Additionally, the type of each element in the sequence must be
    suitable for conversion to a C++ type from a QScriptValue.  See
    \l{Conversion Between QtScript and C++ Types} for more information
    about the restrictions on types that can be used with
    QScriptValue.

    \sa qscriptvalue_cast()
*/

/*!
    \fn T qscriptvalue_cast(const QScriptValue &value)
    \since 4.3
    \relates QScriptValue

    Returns the given \a value converted to the template type \c{T}.

    \sa qScriptRegisterMetaType(), QScriptEngine::toScriptValue()
*/

/*! \fn int qScriptRegisterMetaType(
            QScriptEngine *engine,
            QScriptValue (*toScriptValue)(QScriptEngine *, const T &t),
            void (*fromScriptValue)(const QScriptValue &, T &t),
            const QScriptValue &prototype = QScriptValue())
    \relates QScriptEngine

    Registers the type \c{T} in the given \a engine. \a toScriptValue must
    be a function that will convert from a value of type \c{T} to a
    QScriptValue, and \a fromScriptValue a function that does the
    opposite. \a prototype, if valid, is the prototype that's set on
    QScriptValues returned by \a toScriptValue.

    Returns the internal ID used by QMetaType.

    You only need to call this function if you want to provide custom
    conversion of values of type \c{T}, i.e. if the default
    QVariant-based representation and conversion is not
    appropriate. (Note that custom QObject-derived types also fall in
    this category; e.g. for a QObject-derived class called MyObject,
    you probably want to define conversion functions for MyObject*
    that utilize QScriptEngine::newQObject() and
    QScriptValue::toQObject().)

    If you only want to define a common script interface for values of
    type \c{T}, and don't care how those values are represented
    (i.e. storing them in QVariants is fine), use
    \l{QScriptEngine::setDefaultPrototype()}{setDefaultPrototype}()
    instead; this will minimize conversion costs.

    You need to declare the custom type first with
    Q_DECLARE_METATYPE().

    After a type has been registered, you can convert from a
    QScriptValue to that type using
    \l{QScriptEngine::fromScriptValue()}{fromScriptValue}(), and
    create a QScriptValue from a value of that type using
    \l{QScriptEngine::toScriptValue()}{toScriptValue}(). The engine
    will take care of calling the proper conversion function when
    calling C++ slots, and when getting or setting a C++ property;
    i.e. the custom type may be used seamlessly on both the C++ side
    and the script side.

    The following is an example of how to use this function. We will
    specify custom conversion of our type \c{MyStruct}. Here's the C++
    type:

    \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 20

    We must declare it so that the type will be known to QMetaType:

    \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 21

    Next, the \c{MyStruct} conversion functions. We represent the
    \c{MyStruct} value as a script object and just copy the properties:

    \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 22

    Now we can register \c{MyStruct} with the engine:
    \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 23

    Working with \c{MyStruct} values is now easy:
    \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 24

    If you want to be able to construct values of your custom type
    from script code, you have to register a constructor function for
    the type. For example:

    \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 25

    \sa qScriptRegisterSequenceMetaType(), qRegisterMetaType()
*/

/*!
    \macro Q_SCRIPT_DECLARE_QMETAOBJECT(QMetaObject, ArgType)
    \since 4.3
    \relates QScriptEngine

    Declares the given \a QMetaObject. Used in combination with
    QScriptEngine::scriptValueFromQMetaObject() to make enums and
    instantiation of \a QMetaObject available to script code. The
    constructor generated by this macro takes a single argument of
    type \a ArgType; typically the argument is the parent type of the
    new instance, in which case \a ArgType is \c{QWidget*} or
    \c{QObject*}. Objects created by the constructor will have
    QScriptEngine::AutoOwnership ownership.
*/

/*! \fn int qScriptRegisterSequenceMetaType(
            QScriptEngine *engine,
            const QScriptValue &prototype = QScriptValue())
    \relates QScriptEngine

    Registers the sequence type \c{T} in the given \a engine. This
    function provides conversion functions that convert between \c{T}
    and Qt Script \c{Array} objects. \c{T} must provide a
    const_iterator class and begin(), end() and push_back()
    functions. If \a prototype is valid, it will be set as the
    prototype of \c{Array} objects due to conversion from \c{T};
    otherwise, the standard \c{Array} prototype will be used.

    Returns the internal ID used by QMetaType.

    You need to declare the container type first with
    Q_DECLARE_METATYPE(). If the element type isn't a standard Qt/C++
    type, it must be declared using Q_DECLARE_METATYPE() as well.
    Example:

    \snippet doc/src/snippets/code/src_script_qscriptengine.cpp 26

    \sa qScriptRegisterMetaType()
*/

/*!
  Runs the garbage collector.

  The garbage collector will attempt to reclaim memory by locating and
  disposing of objects that are no longer reachable in the script
  environment.

  Normally you don't need to call this function; the garbage collector
  will automatically be invoked when the QScriptEngine decides that
  it's wise to do so (i.e. when a certain number of new objects have
  been created). However, you can call this function to explicitly
  request that garbage collection should be performed as soon as
  possible.

  \sa reportAdditionalMemoryCost()
*/
void QScriptEngine::collectGarbage()
{
    Q_D(QScriptEngine);
    d->collectGarbage();
}

/*!
  \since 4.7

  Reports an additional memory cost of the given \a size, measured in
  bytes, to the garbage collector.

  This function can be called to indicate that a Qt Script object has
  memory associated with it that isn't managed by Qt Script itself.
  Reporting the additional cost makes it more likely that the garbage
  collector will be triggered.

  Note that if the additional memory is shared with objects outside
  the scripting environment, the cost should not be reported, since
  collecting the Qt Script object would not cause the memory to be
  freed anyway.

  Negative \a size values are ignored, i.e. this function can't be
  used to report that the additional memory has been deallocated.

  \sa collectGarbage()
*/
void QScriptEngine::reportAdditionalMemoryCost(int size)
{
    Q_D(QScriptEngine);
    d->reportAdditionalMemoryCost(size);
}

/*!

  Sets the interval between calls to QCoreApplication::processEvents
  to \a interval milliseconds.

  While the interpreter is running, all event processing is by default
  blocked. This means for instance that the gui will not be updated
  and timers will not be fired. To allow event processing during
  interpreter execution one can specify the processing interval to be
  a positive value, indicating the number of milliseconds between each
  time QCoreApplication::processEvents() is called.

  The default value is -1, which disables event processing during
  interpreter execution.

  You can use QCoreApplication::postEvent() to post an event that
  performs custom processing at the next interval. For example, you
  could keep track of the total running time of the script and call
  abortEvaluation() when you detect that the script has been running
  for a long time without completing.

  \sa processEventsInterval()
*/
void QScriptEngine::setProcessEventsInterval(int interval)
{
    Q_D(QScriptEngine);
    d->processEventsInterval = interval;

    if (interval > 0)
        d->globalData->timeoutChecker->setCheckInterval(interval);

    d->timeoutChecker()->setShouldProcessEvents(interval > 0);
}

/*!

  Returns the interval in milliseconds between calls to
  QCoreApplication::processEvents() while the interpreter is running.

  \sa setProcessEventsInterval()
*/
int QScriptEngine::processEventsInterval() const
{
    Q_D(const QScriptEngine);
    return d->processEventsInterval;
}

/*!
  \since 4.4

  Returns true if this engine is currently evaluating a script,
  otherwise returns false.

  \sa evaluate(), abortEvaluation()
*/
bool QScriptEngine::isEvaluating() const
{
    Q_D(const QScriptEngine);
    return (d->currentFrame != d->globalExec()) || d->inEval;
}

/*!
  \since 4.4

  Aborts any script evaluation currently taking place in this engine.
  The given \a result is passed back as the result of the evaluation
  (i.e. it is returned from the call to evaluate() being aborted).

  If the engine isn't evaluating a script (i.e. isEvaluating() returns
  false), this function does nothing.

  Call this function if you need to abort a running script for some
  reason, e.g.  when you have detected that the script has been
  running for several seconds without completing.

  \sa evaluate(), isEvaluating(), setProcessEventsInterval()
*/
void QScriptEngine::abortEvaluation(const QScriptValue &result)
{
    Q_D(QScriptEngine);

    d->timeoutChecker()->setShouldAbort(true);
    d->abortResult = result;
}

#ifndef QT_NO_QOBJECT

/*!
  \since 4.4
  \relates QScriptEngine

  Creates a connection from the \a signal in the \a sender to the
  given \a function. If \a receiver is an object, it will act as the
  `this' object when the signal handler function is invoked. Returns
  true if the connection succeeds; otherwise returns false.

  \sa qScriptDisconnect(), QScriptEngine::signalHandlerException()
*/
bool qScriptConnect(QObject *sender, const char *signal,
                    const QScriptValue &receiver, const QScriptValue &function)
{
    if (!sender || !signal)
        return false;
    if (!function.isFunction())
        return false;
    if (receiver.isObject() && (receiver.engine() != function.engine()))
        return false;
    QScriptEnginePrivate *engine = QScriptEnginePrivate::get(function.engine());
    QScript::APIShim shim(engine);
    JSC::JSValue jscReceiver = engine->scriptValueToJSCValue(receiver);
    JSC::JSValue jscFunction = engine->scriptValueToJSCValue(function);
    return engine->scriptConnect(sender, signal, jscReceiver, jscFunction,
                                 Qt::AutoConnection);
}

/*!
  \since 4.4
  \relates QScriptEngine

  Disconnects the \a signal in the \a sender from the given (\a
  receiver, \a function) pair. Returns true if the connection is
  successfully broken; otherwise returns false.

  \sa qScriptConnect()
*/
bool qScriptDisconnect(QObject *sender, const char *signal,
                       const QScriptValue &receiver, const QScriptValue &function)
{
    if (!sender || !signal)
        return false;
    if (!function.isFunction())
        return false;
    if (receiver.isObject() && (receiver.engine() != function.engine()))
        return false;
    QScriptEnginePrivate *engine = QScriptEnginePrivate::get(function.engine());
    QScript::APIShim shim(engine);
    JSC::JSValue jscReceiver = engine->scriptValueToJSCValue(receiver);
    JSC::JSValue jscFunction = engine->scriptValueToJSCValue(function);
    return engine->scriptDisconnect(sender, signal, jscReceiver, jscFunction);
}

/*!
    \since 4.4
    \fn void QScriptEngine::signalHandlerException(const QScriptValue &exception)

    This signal is emitted when a script function connected to a signal causes
    an \a exception.

    \sa qScriptConnect()
*/

QT_BEGIN_INCLUDE_NAMESPACE
#include "moc_qscriptengine.cpp"
QT_END_INCLUDE_NAMESPACE

#endif // QT_NO_QOBJECT

/*!
  \since 4.4

  Installs the given \a agent on this engine. The agent will be
  notified of various events pertaining to script execution. This is
  useful when you want to find out exactly what the engine is doing,
  e.g. when evaluate() is called. The agent interface is the basis of
  tools like debuggers and profilers.

  The engine maintains ownership of the \a agent.

  Calling this function will replace the existing agent, if any.

  \sa agent()
*/
void QScriptEngine::setAgent(QScriptEngineAgent *agent)
{
    Q_D(QScriptEngine);
    if (agent && (agent->engine() != this)) {
        qWarning("QScriptEngine::setAgent(): "
                 "cannot set agent belonging to different engine");
        return;
    }
    if (d->activeAgent)
        QScriptEngineAgentPrivate::get(d->activeAgent)->detach();
    d->activeAgent = agent;
    if (agent) {
        QScriptEngineAgentPrivate::get(agent)->attach();
    }
}

/*!
  \since 4.4

  Returns the agent currently installed on this engine, or 0 if no
  agent is installed.

  \sa setAgent()
*/
QScriptEngineAgent *QScriptEngine::agent() const
{
    Q_D(const QScriptEngine);
    return d->activeAgent;
}

/*!
  \since 4.4

  Returns a handle that represents the given string, \a str.

  QScriptString can be used to quickly look up properties, and
  compare property names, of script objects.

  \sa QScriptValue::property()
*/
QScriptString QScriptEngine::toStringHandle(const QString &str)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    return d->toStringHandle(JSC::Identifier(d->currentFrame, str));
}

/*!
  \since 4.5

  Converts the given \a value to an object, if such a conversion is
  possible; otherwise returns an invalid QScriptValue. The conversion
  is performed according to the following table:

    \table
    \header \o Input Type \o Result
    \row    \o Undefined  \o An invalid QScriptValue.
    \row    \o Null       \o An invalid QScriptValue.
    \row    \o Boolean    \o A new Boolean object whose internal value is set to the value of the boolean.
    \row    \o Number     \o A new Number object whose internal value is set to the value of the number.
    \row    \o String     \o A new String object whose internal value is set to the value of the string.
    \row    \o Object     \o The result is the object itself (no conversion).
    \endtable

    \sa newObject()
*/
QScriptValue QScriptEngine::toObject(const QScriptValue &value)
{
    Q_D(QScriptEngine);
    QScript::APIShim shim(d);
    JSC::JSValue jscValue = d->scriptValueToJSCValue(value);
    if (!jscValue || jscValue.isUndefined() || jscValue.isNull())
        return QScriptValue();
    JSC::ExecState* exec = d->currentFrame;
    JSC::JSValue result = jscValue.toObject(exec);
    return d->scriptValueFromJSCValue(result);
}

/*!
  \internal

  Returns the object with the given \a id, or an invalid
  QScriptValue if there is no object with that id.

  \sa QScriptValue::objectId()
*/
QScriptValue QScriptEngine::objectById(qint64 id) const
{
    Q_D(const QScriptEngine);
    // Assumes that the cell was not been garbage collected
    return const_cast<QScriptEnginePrivate*>(d)->scriptValueFromJSCValue((JSC::JSCell*)id);
}

/*!
  \since 4.5
  \class QScriptSyntaxCheckResult

  \brief The QScriptSyntaxCheckResult class provides the result of a script syntax check.

  \ingroup script
  \mainclass

  QScriptSyntaxCheckResult is returned by QScriptEngine::checkSyntax() to
  provide information about the syntactical (in)correctness of a script.
*/

/*!
    \enum QScriptSyntaxCheckResult::State

    This enum specifies the state of a syntax check.

    \value Error The program contains a syntax error.
    \value Intermediate The program is incomplete.
    \value Valid The program is a syntactically correct Qt Script program.
*/

/*!
  Constructs a new QScriptSyntaxCheckResult from the \a other result.
*/
QScriptSyntaxCheckResult::QScriptSyntaxCheckResult(const QScriptSyntaxCheckResult &other)
    : d_ptr(other.d_ptr)
{
}

/*!
  \internal
*/
QScriptSyntaxCheckResult::QScriptSyntaxCheckResult(QScriptSyntaxCheckResultPrivate *d)
    : d_ptr(d)
{
}

/*!
  \internal
*/
QScriptSyntaxCheckResult::QScriptSyntaxCheckResult()
    : d_ptr(0)
{
}

/*!
  Destroys this QScriptSyntaxCheckResult.
*/
QScriptSyntaxCheckResult::~QScriptSyntaxCheckResult()
{
}

/*!
  Returns the state of this QScriptSyntaxCheckResult.
*/
QScriptSyntaxCheckResult::State QScriptSyntaxCheckResult::state() const
{
    Q_D(const QScriptSyntaxCheckResult);
    if (!d)
        return Valid;
    return d->state;
}

/*!
  Returns the error line number of this QScriptSyntaxCheckResult, or -1 if
  there is no error.

  \sa state(), errorMessage()
*/
int QScriptSyntaxCheckResult::errorLineNumber() const
{
    Q_D(const QScriptSyntaxCheckResult);
    if (!d)
        return -1;
    return d->errorLineNumber;
}

/*!
  Returns the error column number of this QScriptSyntaxCheckResult, or -1 if
  there is no error.

  \sa state(), errorLineNumber()
*/
int QScriptSyntaxCheckResult::errorColumnNumber() const
{
    Q_D(const QScriptSyntaxCheckResult);
    if (!d)
        return -1;
    return d->errorColumnNumber;
}

/*!
  Returns the error message of this QScriptSyntaxCheckResult, or an empty
  string if there is no error.

  \sa state(), errorLineNumber()
*/
QString QScriptSyntaxCheckResult::errorMessage() const
{
    Q_D(const QScriptSyntaxCheckResult);
    if (!d)
        return QString();
    return d->errorMessage;
}

/*!
  Assigns the \a other result to this QScriptSyntaxCheckResult, and returns a
  reference to this QScriptSyntaxCheckResult.
*/
QScriptSyntaxCheckResult &QScriptSyntaxCheckResult::operator=(const QScriptSyntaxCheckResult &other)
{
    d_ptr = other.d_ptr;
    return *this;
}

#ifdef QT_BUILD_INTERNAL
Q_AUTOTEST_EXPORT bool qt_script_isJITEnabled()
{
#if ENABLE(JIT)
    return true;
#else
    return false;
#endif
}
#endif

#ifdef Q_CC_MSVC
// Try to prevent compiler from crashing.
#pragma optimize("", off)
#endif

QT_END_NAMESPACE