summaryrefslogtreecommitdiff
path: root/src/sql/drivers/ibase/qsql_ibase.cpp
blob: 86e4398818653ca250a5246f90a16ac46141803c (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
/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtSql module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qsql_ibase.h"
#include <qcoreapplication.h>
#include <qdatetime.h>
#include <qvariant.h>
#include <qsqlerror.h>
#include <qsqlfield.h>
#include <qsqlindex.h>
#include <qsqlquery.h>
#include <qlist.h>
#include <qvector.h>
#include <qtextcodec.h>
#include <qmutex.h>
#include <stdlib.h>
#include <limits.h>
#include <math.h>
#include <qdebug.h>
#include <QVarLengthArray>

QT_BEGIN_NAMESPACE

#define FBVERSION SQL_DIALECT_V6

#ifndef SQLDA_CURRENT_VERSION
#define SQLDA_CURRENT_VERSION SQLDA_VERSION1
#endif

enum { QIBaseChunkSize = SHRT_MAX / 2 };

#if defined(FB_API_VER) && FB_API_VER >= 20
static bool getIBaseError(QString& msg, const ISC_STATUS* status, ISC_LONG &sqlcode, QTextCodec *tc)
#else
static bool getIBaseError(QString& msg, ISC_STATUS* status, ISC_LONG &sqlcode, QTextCodec *tc)
#endif
{
    if (status[0] != 1 || status[1] <= 0)
        return false;

    msg.clear();
    sqlcode = isc_sqlcode(status);
    char buf[512];
#if defined(FB_API_VER) && FB_API_VER >= 20
    while(fb_interpret(buf, 512, &status)) {
#else
    while(isc_interprete(buf, &status)) {
#endif
        if(!msg.isEmpty())
            msg += QLatin1String(" - ");
        if (tc)
            msg += tc->toUnicode(buf);
        else
            msg += QString::fromUtf8(buf);
    }
    return true;
}

static void createDA(XSQLDA *&sqlda)
{
    sqlda = (XSQLDA *) malloc(XSQLDA_LENGTH(1));
    if (sqlda == (XSQLDA*)0) return;
    sqlda->sqln = 1;
    sqlda->sqld = 0;
    sqlda->version = SQLDA_CURRENT_VERSION;
    sqlda->sqlvar[0].sqlind = 0;
    sqlda->sqlvar[0].sqldata = 0;
}

static void enlargeDA(XSQLDA *&sqlda, int n)
{
    if (sqlda != (XSQLDA*)0)
        free(sqlda);
    sqlda = (XSQLDA *) malloc(XSQLDA_LENGTH(n));
    if (sqlda == (XSQLDA*)0) return;
    sqlda->sqln = n;
    sqlda->version = SQLDA_CURRENT_VERSION;
}

static void initDA(XSQLDA *sqlda)
{
    for (int i = 0; i < sqlda->sqld; ++i) {
        switch (sqlda->sqlvar[i].sqltype & ~1) {
        case SQL_INT64:
        case SQL_LONG:
        case SQL_SHORT:
        case SQL_FLOAT:
        case SQL_DOUBLE:
        case SQL_TIMESTAMP:
        case SQL_TYPE_TIME:
        case SQL_TYPE_DATE:
        case SQL_TEXT:
        case SQL_BLOB:
            sqlda->sqlvar[i].sqldata = new char[sqlda->sqlvar[i].sqllen];
            break;
        case SQL_ARRAY:
            sqlda->sqlvar[i].sqldata = new char[sizeof(ISC_QUAD)];
            memset(sqlda->sqlvar[i].sqldata, 0, sizeof(ISC_QUAD));
            break;
        case SQL_VARYING:
            sqlda->sqlvar[i].sqldata = new char[sqlda->sqlvar[i].sqllen + sizeof(short)];
            break;
        default:
            // not supported - do not bind.
            sqlda->sqlvar[i].sqldata = 0;
            break;
        }
        if (sqlda->sqlvar[i].sqltype & 1) {
            sqlda->sqlvar[i].sqlind = new short[1];
            *(sqlda->sqlvar[i].sqlind) = 0;
        } else {
            sqlda->sqlvar[i].sqlind = 0;
        }
    }
}

static void delDA(XSQLDA *&sqlda)
{
    if (!sqlda)
        return;
    for (int i = 0; i < sqlda->sqld; ++i) {
        delete [] sqlda->sqlvar[i].sqlind;
        delete [] sqlda->sqlvar[i].sqldata;
    }
    free(sqlda);
    sqlda = 0;
}

static QVariant::Type qIBaseTypeName(int iType, bool hasScale)
{
    switch (iType) {
    case blr_varying:
    case blr_varying2:
    case blr_text:
    case blr_cstring:
    case blr_cstring2:
        return QVariant::String;
    case blr_sql_time:
        return QVariant::Time;
    case blr_sql_date:
        return QVariant::Date;
    case blr_timestamp:
        return QVariant::DateTime;
    case blr_blob:
        return QVariant::ByteArray;
    case blr_quad:
    case blr_short:
    case blr_long:
        return (hasScale ? QVariant::Double : QVariant::Int);
    case blr_int64:
        return (hasScale ? QVariant::Double : QVariant::LongLong);
    case blr_float:
    case blr_d_float:
    case blr_double:
        return QVariant::Double;
    }
    qWarning("qIBaseTypeName: unknown datatype: %d", iType);
    return QVariant::Invalid;
}

static QVariant::Type qIBaseTypeName2(int iType, bool hasScale)
{
    switch(iType & ~1) {
    case SQL_VARYING:
    case SQL_TEXT:
        return QVariant::String;
    case SQL_LONG:
    case SQL_SHORT:
        return (hasScale ? QVariant::Double : QVariant::Int);
    case SQL_INT64:
        return (hasScale ? QVariant::Double : QVariant::LongLong);
    case SQL_FLOAT:
    case SQL_DOUBLE:
        return QVariant::Double;
    case SQL_TIMESTAMP:
        return QVariant::DateTime;
    case SQL_TYPE_TIME:
        return QVariant::Time;
    case SQL_TYPE_DATE:
        return QVariant::Date;
    case SQL_ARRAY:
        return QVariant::List;
    case SQL_BLOB:
        return QVariant::ByteArray;
    default:
        return QVariant::Invalid;
    }
}

static ISC_TIMESTAMP toTimeStamp(const QDateTime &dt)
{
    static const QTime midnight(0, 0, 0, 0);
    static const QDate basedate(1858, 11, 17);
    ISC_TIMESTAMP ts;
    ts.timestamp_time = midnight.msecsTo(dt.time()) * 10;
    ts.timestamp_date = basedate.daysTo(dt.date());
    return ts;
}

static QDateTime fromTimeStamp(char *buffer)
{
    static const QDate bd(1858, 11, 17);
    QTime t;
    QDate d;

    // have to demangle the structure ourselves because isc_decode_time
    // strips the msecs
    t = t.addMSecs(int(((ISC_TIMESTAMP*)buffer)->timestamp_time / 10));
    d = bd.addDays(int(((ISC_TIMESTAMP*)buffer)->timestamp_date));

    return QDateTime(d, t);
}

static ISC_TIME toTime(const QTime &t)
{
    static const QTime midnight(0, 0, 0, 0);
    return (ISC_TIME)midnight.msecsTo(t) * 10;
}

static QTime fromTime(char *buffer)
{
    QTime t;
    // have to demangle the structure ourselves because isc_decode_time
    // strips the msecs
    t = t.addMSecs(int((*(ISC_TIME*)buffer) / 10));

    return t;
}

static ISC_DATE toDate(const QDate &t)
{
    static const QDate basedate(1858, 11, 17);
    ISC_DATE date;

    date = basedate.daysTo(t);
    return date;
}

static QDate fromDate(char *buffer)
{
    static const QDate bd(1858, 11, 17);
    QDate d;

    // have to demangle the structure ourselves because isc_decode_time
    // strips the msecs
    d = bd.addDays(int(((ISC_TIMESTAMP*)buffer)->timestamp_date));

    return d;
}

static QByteArray encodeString(QTextCodec *tc, const QString &str)
{
    if (tc)
        return tc->fromUnicode(str);
    return str.toUtf8();
}

struct QIBaseEventBuffer {
#if defined(FB_API_VER) && FB_API_VER >= 20
    ISC_UCHAR *eventBuffer;
    ISC_UCHAR *resultBuffer;
#else
    char *eventBuffer;
    char *resultBuffer;
#endif
    ISC_LONG bufferLength;
    ISC_LONG eventId;

    enum QIBaseSubscriptionState { Starting, Subscribed, Finished };
    QIBaseSubscriptionState subscriptionState;
};

class QIBaseDriverPrivate
{
public:
    QIBaseDriverPrivate(QIBaseDriver *d) : q(d), ibase(0), trans(0), tc(0) {}

    bool isError(const char *msg, QSqlError::ErrorType typ = QSqlError::UnknownError)
    {
        QString imsg;
        ISC_LONG sqlcode;
        if (!getIBaseError(imsg, status, sqlcode, tc))
            return false;

        q->setLastError(QSqlError(QCoreApplication::translate("QIBaseDriver", msg),
                        imsg, typ, int(sqlcode)));
        return true;
    }

public:
    QIBaseDriver* q;
    isc_db_handle ibase;
    isc_tr_handle trans;
    QTextCodec *tc;
    ISC_STATUS status[20];
    QMap<QString, QIBaseEventBuffer*> eventBuffers;
};

typedef QMap<void *, QIBaseDriver *> QIBaseBufferDriverMap;
Q_GLOBAL_STATIC(QIBaseBufferDriverMap, qBufferDriverMap)
Q_GLOBAL_STATIC(QMutex, qMutex);

static void qFreeEventBuffer(QIBaseEventBuffer* eBuffer)
{
    qMutex()->lock();
    qBufferDriverMap()->remove(reinterpret_cast<void *>(eBuffer->resultBuffer));
    qMutex()->unlock();
    delete eBuffer;
}

class QIBaseResultPrivate
{
public:
    QIBaseResultPrivate(QIBaseResult *d, const QIBaseDriver *ddb);
    ~QIBaseResultPrivate() { cleanup(); }

    void cleanup();
    bool isError(const char *msg, QSqlError::ErrorType typ = QSqlError::UnknownError)
    {
        QString imsg;
        ISC_LONG sqlcode;
        if (!getIBaseError(imsg, status, sqlcode, tc))
            return false;

        q->setLastError(QSqlError(QCoreApplication::translate("QIBaseResult", msg),
                        imsg, typ, int(sqlcode)));
        return true;
    }

    bool transaction();
    bool commit();

    bool isSelect();
    QVariant fetchBlob(ISC_QUAD *bId);
    bool writeBlob(int i, const QByteArray &ba);
    QVariant fetchArray(int pos, ISC_QUAD *arr);
    bool writeArray(int i, const QList<QVariant> &list);

public:
    QIBaseResult *q;
    const QIBaseDriver *db;
    ISC_STATUS status[20];
    isc_tr_handle trans;
    //indicator whether we have a local transaction or a transaction on driver level
    bool localTransaction;
    isc_stmt_handle stmt;
    isc_db_handle ibase;
    XSQLDA *sqlda; // output sqlda
    XSQLDA *inda; // input parameters
    int queryType;
    QTextCodec *tc;
};


QIBaseResultPrivate::QIBaseResultPrivate(QIBaseResult *d, const QIBaseDriver *ddb):
    q(d), db(ddb), trans(0), stmt(0), ibase(ddb->d->ibase), sqlda(0), inda(0), queryType(-1), tc(ddb->d->tc)
{
    localTransaction = (ddb->d->ibase == 0);
}

void QIBaseResultPrivate::cleanup()
{
    commit();
    if (!localTransaction)
        trans = 0;

    if (stmt) {
        isc_dsql_free_statement(status, &stmt, DSQL_drop);
        stmt = 0;
    }

    delDA(sqlda);
    delDA(inda);

    queryType = -1;
    q->cleanup();
}

bool QIBaseResultPrivate::writeBlob(int i, const QByteArray &ba)
{
    isc_blob_handle handle = 0;
    ISC_QUAD *bId = (ISC_QUAD*)inda->sqlvar[i].sqldata;
    isc_create_blob2(status, &ibase, &trans, &handle, bId, 0, 0);
    if (!isError(QT_TRANSLATE_NOOP("QIBaseResult", "Unable to create BLOB"),
                 QSqlError::StatementError)) {
        int i = 0;
        while (i < ba.size()) {
            isc_put_segment(status, &handle, qMin(ba.size() - i, int(QIBaseChunkSize)),
                            const_cast<char*>(ba.data()) + i);
            if (isError(QT_TRANSLATE_NOOP("QIBaseResult", "Unable to write BLOB")))
                return false;
            i += qMin(ba.size() - i, int(QIBaseChunkSize));
        }
    }
    isc_close_blob(status, &handle);
    return true;
}

QVariant QIBaseResultPrivate::fetchBlob(ISC_QUAD *bId)
{
    isc_blob_handle handle = 0;

    isc_open_blob2(status, &ibase, &trans, &handle, bId, 0, 0);
    if (isError(QT_TRANSLATE_NOOP("QIBaseResult", "Unable to open BLOB"),
                QSqlError::StatementError))
        return QVariant();

    unsigned short len = 0;
    QByteArray ba;
    int chunkSize = QIBaseChunkSize;
    ba.resize(chunkSize);
    int read = 0;
    while (isc_get_segment(status, &handle, &len, chunkSize, ba.data() + read) == 0 || status[1] == isc_segment) {
        read += len;
        ba.resize(read + chunkSize);
    }
    ba.resize(read);

    bool isErr = (status[1] == isc_segstr_eof ? false :
                    isError(QT_TRANSLATE_NOOP("QIBaseResult",
                                                "Unable to read BLOB"),
                                                QSqlError::StatementError));

    isc_close_blob(status, &handle);

    if (isErr)
        return QVariant();

    ba.resize(read);
    return ba;
}

template<typename T>
static QList<QVariant> toList(char** buf, int count, T* = 0)
{
    QList<QVariant> res;
    for (int i = 0; i < count; ++i) {
        res.append(*(T*)(*buf));
        *buf += sizeof(T);
    }
    return res;
}
/* char** ? seems like bad influence from oracle ... */
template<>
QList<QVariant> toList<long>(char** buf, int count, long*)
{
    QList<QVariant> res;
    for (int i = 0; i < count; ++i) {
        if (sizeof(int) == sizeof(long))
            res.append(int((*(long*)(*buf))));
        else
            res.append((qint64)(*(long*)(*buf)));
        *buf += sizeof(long);
    }
    return res;
}

static char* readArrayBuffer(QList<QVariant>& list, char *buffer, short curDim,
                             short* numElements, ISC_ARRAY_DESC *arrayDesc,
                             QTextCodec *tc)
{
    const short dim = arrayDesc->array_desc_dimensions - 1;
    const unsigned char dataType = arrayDesc->array_desc_dtype;
    QList<QVariant> valList;
    unsigned short strLen = arrayDesc->array_desc_length;

    if (curDim != dim) {
        for(int i = 0; i < numElements[curDim]; ++i)
            buffer = readArrayBuffer(list, buffer, curDim + 1, numElements,
                                     arrayDesc, tc);
    } else {
        switch(dataType) {
            case blr_varying:
            case blr_varying2:
                 strLen += 2; // for the two terminating null values
            case blr_text:
            case blr_text2: {
                int o;
                for (int i = 0; i < numElements[dim]; ++i) {
                    for(o = 0; o < strLen && buffer[o]!=0; ++o )
                        ;

                    if (tc)
                        valList.append(tc->toUnicode(buffer, o));
                    else
                        valList.append(QString::fromUtf8(buffer, o));

                    buffer += strLen;
                }
                break; }
            case blr_long:
                valList = toList<long>(&buffer, numElements[dim], static_cast<long *>(0));
                break;
            case blr_short:
                valList = toList<short>(&buffer, numElements[dim]);
                break;
            case blr_int64:
                valList = toList<qint64>(&buffer, numElements[dim]);
                break;
            case blr_float:
                valList = toList<float>(&buffer, numElements[dim]);
                break;
            case blr_double:
                valList = toList<double>(&buffer, numElements[dim]);
                break;
            case blr_timestamp:
                for(int i = 0; i < numElements[dim]; ++i) {
                    valList.append(fromTimeStamp(buffer));
                    buffer += sizeof(ISC_TIMESTAMP);
                }
                break;
            case blr_sql_time:
                for(int i = 0; i < numElements[dim]; ++i) {
                    valList.append(fromTime(buffer));
                    buffer += sizeof(ISC_TIME);
                }
                break;
            case blr_sql_date:
                for(int i = 0; i < numElements[dim]; ++i) {
                    valList.append(fromDate(buffer));
                    buffer += sizeof(ISC_DATE);
                }
                break;
        }
    }
    if (dim > 0)
        list.append(valList);
    else
        list += valList;
    return buffer;
}

QVariant QIBaseResultPrivate::fetchArray(int pos, ISC_QUAD *arr)
{
    QList<QVariant> list;
    ISC_ARRAY_DESC desc;

    if (!arr)
        return list;

    QByteArray relname(sqlda->sqlvar[pos].relname, sqlda->sqlvar[pos].relname_length);
    QByteArray sqlname(sqlda->sqlvar[pos].aliasname, sqlda->sqlvar[pos].aliasname_length);

    isc_array_lookup_bounds(status, &ibase, &trans, relname.data(), sqlname.data(), &desc);
    if (isError(QT_TRANSLATE_NOOP("QIBaseResult", "Could not find array"),
                QSqlError::StatementError))
        return list;


    int arraySize = 1, subArraySize;
    short dimensions = desc.array_desc_dimensions;
    QVarLengthArray<short> numElements(dimensions);

    for(int i = 0; i < dimensions; ++i) {
        subArraySize = (desc.array_desc_bounds[i].array_bound_upper -
                      desc.array_desc_bounds[i].array_bound_lower + 1);
        numElements[i] = subArraySize;
        arraySize = subArraySize * arraySize;
    }

    ISC_LONG bufLen;
    QByteArray ba;
    /* varying arrayelements are stored with 2 trailing null bytes
       indicating the length of the string
     */
    if (desc.array_desc_dtype == blr_varying
        || desc.array_desc_dtype == blr_varying2) {
        desc.array_desc_length += 2;
        bufLen = desc.array_desc_length * arraySize * sizeof(short);
    } else {
        bufLen = desc.array_desc_length *  arraySize;
    }


    ba.resize(int(bufLen));
    isc_array_get_slice(status, &ibase, &trans, arr, &desc, ba.data(), &bufLen);
    if (isError(QT_TRANSLATE_NOOP("QIBaseResult", "Could not get array data"),
                QSqlError::StatementError))
        return list;

    readArrayBuffer(list, ba.data(), 0, numElements.data(), &desc, tc);

    return QVariant(list);
}

template<typename T>
static char* fillList(char *buffer, const QList<QVariant> &list, T* = 0)
{
    for (int i = 0; i < list.size(); ++i) {
        T val;
        val = qvariant_cast<T>(list.at(i));
        memcpy(buffer, &val, sizeof(T));
        buffer += sizeof(T);
    }
    return buffer;
}

template<>
char* fillList<float>(char *buffer, const QList<QVariant> &list, float*)
{
    for (int i = 0; i < list.size(); ++i) {
        double val;
        float val2 = 0;
        val = qvariant_cast<double>(list.at(i));
        val2 = (float)val;
        memcpy(buffer, &val2, sizeof(float));
        buffer += sizeof(float);
    }
    return buffer;
}

static char* qFillBufferWithString(char *buffer, const QString& string,
                                   short buflen, bool varying, bool array,
                                   QTextCodec *tc)
{
    QByteArray str = encodeString(tc, string); // keep a copy of the string alive in this scope
    if (varying) {
        short tmpBuflen = buflen;
        if (str.length() < buflen)
            buflen = str.length();
        if (array) { // interbase stores varying arrayelements different than normal varying elements
            memcpy(buffer, str.data(), buflen);
            memset(buffer + buflen, 0, tmpBuflen - buflen);
        } else {
            *(short*)buffer = buflen; // first two bytes is the length
            memcpy(buffer + sizeof(short), str.data(), buflen);
        }
        buffer += tmpBuflen;
    } else {
        str = str.leftJustified(buflen, ' ', true);
        memcpy(buffer, str.data(), buflen);
        buffer += buflen;
    }
    return buffer;
}

static char* createArrayBuffer(char *buffer, const QList<QVariant> &list,
                               QVariant::Type type, short curDim, ISC_ARRAY_DESC *arrayDesc,
                               QString& error, QTextCodec *tc)
{
    int i;
    ISC_ARRAY_BOUND *bounds = arrayDesc->array_desc_bounds;
    short dim = arrayDesc->array_desc_dimensions - 1;

    int elements = (bounds[curDim].array_bound_upper -
                    bounds[curDim].array_bound_lower + 1);

    if (list.size() != elements) { // size mismatch
        error = QLatin1String("Expected size: %1. Supplied size: %2");
        error = QLatin1String("Array size mismatch. Fieldname: %1 ")
                + error.arg(elements).arg(list.size());
        return 0;
    }

    if (curDim != dim) {
        for(i = 0; i < list.size(); ++i) {

          if (list.at(i).type() != QVariant::List) { // dimensions mismatch
              error = QLatin1String("Array dimensons mismatch. Fieldname: %1");
              return 0;
          }

          buffer = createArrayBuffer(buffer, list.at(i).toList(), type, curDim + 1,
                                     arrayDesc, error, tc);
          if (!buffer)
              return 0;
        }
    } else {
        switch(type) {
        case QVariant::Int:
        case QVariant::UInt:
            if (arrayDesc->array_desc_dtype == blr_short)
                buffer = fillList<short>(buffer, list);
            else
                buffer = fillList<int>(buffer, list);
            break;
        case QVariant::Double:
            if (arrayDesc->array_desc_dtype == blr_float)
                buffer = fillList<float>(buffer, list, static_cast<float *>(0));
            else
                buffer = fillList<double>(buffer, list);
            break;
        case QVariant::LongLong:
            buffer = fillList<qint64>(buffer, list);
            break;
        case QVariant::ULongLong:
            buffer = fillList<quint64>(buffer, list);
            break;
        case QVariant::String:
            for (i = 0; i < list.size(); ++i)
                buffer = qFillBufferWithString(buffer, list.at(i).toString(),
                                               arrayDesc->array_desc_length,
                                               arrayDesc->array_desc_dtype == blr_varying,
                                               true, tc);
            break;
        case QVariant::Date:
            for (i = 0; i < list.size(); ++i) {
                *((ISC_DATE*)buffer) = toDate(list.at(i).toDate());
                buffer += sizeof(ISC_DATE);
            }
            break;
        case QVariant::Time:
            for (i = 0; i < list.size(); ++i) {
                *((ISC_TIME*)buffer) = toTime(list.at(i).toTime());
                buffer += sizeof(ISC_TIME);
            }
            break;

        case QVariant::DateTime:
            for (i = 0; i < list.size(); ++i) {
                *((ISC_TIMESTAMP*)buffer) = toTimeStamp(list.at(i).toDateTime());
                buffer += sizeof(ISC_TIMESTAMP);
            }
            break;
        default:
            break;
        }
    }
    return buffer;
}

bool QIBaseResultPrivate::writeArray(int column, const QList<QVariant> &list)
{
    QString error;
    ISC_QUAD *arrayId = (ISC_QUAD*) inda->sqlvar[column].sqldata;
    ISC_ARRAY_DESC desc;

    QByteArray relname(inda->sqlvar[column].relname, inda->sqlvar[column].relname_length);
    QByteArray sqlname(inda->sqlvar[column].aliasname, inda->sqlvar[column].aliasname_length);

    isc_array_lookup_bounds(status, &ibase, &trans, relname.data(), sqlname.data(), &desc);
    if (isError(QT_TRANSLATE_NOOP("QIBaseResult", "Could not find array"),
                QSqlError::StatementError))
        return false;

    short arraySize = 1;
    ISC_LONG bufLen;
    QList<QVariant> subList = list;

    short dimensions = desc.array_desc_dimensions;
    for(int i = 0; i < dimensions; ++i) {
        arraySize *= (desc.array_desc_bounds[i].array_bound_upper -
                      desc.array_desc_bounds[i].array_bound_lower + 1);
    }

    /* varying arrayelements are stored with 2 trailing null bytes
       indicating the length of the string
     */
    if (desc.array_desc_dtype == blr_varying ||
       desc.array_desc_dtype == blr_varying2)
        desc.array_desc_length += 2;

    bufLen = desc.array_desc_length * arraySize;
    QByteArray ba;
    ba.resize(int(bufLen));

    if (list.size() > arraySize) {
        error = QLatin1String("Array size missmatch: size of %1 is %2, size of provided list is %3");
        error = error.arg(QLatin1String(sqlname)).arg(arraySize).arg(list.size());
        q->setLastError(QSqlError(error, QLatin1String(""), QSqlError::StatementError));
        return false;
    }

    if (!createArrayBuffer(ba.data(), list,
                           qIBaseTypeName(desc.array_desc_dtype, inda->sqlvar[column].sqlscale < 0),
                           0, &desc, error, tc)) {
        q->setLastError(QSqlError(error.arg(QLatin1String(sqlname)), QLatin1String(""),
                        QSqlError::StatementError));
        return false;
    }

    /* readjust the buffer size*/
    if (desc.array_desc_dtype == blr_varying
        || desc.array_desc_dtype == blr_varying2)
        desc.array_desc_length -= 2;

    isc_array_put_slice(status, &ibase, &trans, arrayId, &desc, ba.data(), &bufLen);
    return true;
}


bool QIBaseResultPrivate::isSelect()
{
    char acBuffer[9];
    char qType = isc_info_sql_stmt_type;
    isc_dsql_sql_info(status, &stmt, 1, &qType, sizeof(acBuffer), acBuffer);
    if (isError(QT_TRANSLATE_NOOP("QIBaseResult", "Could not get query info"),
                QSqlError::StatementError))
        return false;
    int iLength = isc_vax_integer(&acBuffer[1], 2);
    queryType = isc_vax_integer(&acBuffer[3], iLength);
    return (queryType == isc_info_sql_stmt_select || queryType == isc_info_sql_stmt_exec_procedure);
}

bool QIBaseResultPrivate::transaction()
{
    if (trans)
        return true;
    if (db->d->trans) {
        localTransaction = false;
        trans = db->d->trans;
        return true;
    }
    localTransaction = true;

    isc_start_transaction(status, &trans, 1, &ibase, 0, NULL);
    if (isError(QT_TRANSLATE_NOOP("QIBaseResult", "Could not start transaction"),
                QSqlError::TransactionError))
        return false;

    return true;
}

// does nothing if the transaction is on the
// driver level
bool QIBaseResultPrivate::commit()
{
    if (!trans)
        return false;
    // don't commit driver's transaction, the driver will do it for us
    if (!localTransaction)
        return true;

    isc_commit_transaction(status, &trans);
    trans = 0;
    return !isError(QT_TRANSLATE_NOOP("QIBaseResult", "Unable to commit transaction"),
                    QSqlError::TransactionError);
}

//////////

QIBaseResult::QIBaseResult(const QIBaseDriver* db):
    QSqlCachedResult(db)
{
    d = new QIBaseResultPrivate(this, db);
}

QIBaseResult::~QIBaseResult()
{
    delete d;
}

bool QIBaseResult::prepare(const QString& query)
{
//     qDebug("prepare: %s", qPrintable(query));
    if (!driver() || !driver()->isOpen() || driver()->isOpenError())
        return false;
    d->cleanup();
    setActive(false);
    setAt(QSql::BeforeFirstRow);

    createDA(d->sqlda);
    if (d->sqlda == (XSQLDA*)0) {
        qWarning()<<"QIOBaseResult: createDA(): failed to allocate memory";
        return false;
    }

    createDA(d->inda);
    if (d->inda == (XSQLDA*)0){
        qWarning()<<"QIOBaseResult: createDA():  failed to allocate memory";
        return false;
    }

    if (!d->transaction())
        return false;

    isc_dsql_allocate_statement(d->status, &d->ibase, &d->stmt);
    if (d->isError(QT_TRANSLATE_NOOP("QIBaseResult", "Could not allocate statement"),
                   QSqlError::StatementError))
        return false;
    isc_dsql_prepare(d->status, &d->trans, &d->stmt, 0,
        const_cast<char*>(encodeString(d->tc, query).constData()), FBVERSION, d->sqlda);
    if (d->isError(QT_TRANSLATE_NOOP("QIBaseResult", "Could not prepare statement"),
                   QSqlError::StatementError))
        return false;

    isc_dsql_describe_bind(d->status, &d->stmt, FBVERSION, d->inda);
    if (d->isError(QT_TRANSLATE_NOOP("QIBaseResult",
                    "Could not describe input statement"), QSqlError::StatementError))
        return false;
    if (d->inda->sqld > d->inda->sqln) {
        enlargeDA(d->inda, d->inda->sqld);
        if (d->inda == (XSQLDA*)0) {
            qWarning()<<"QIOBaseResult: enlargeDA(): failed to allocate memory";
            return false;
        }

        isc_dsql_describe_bind(d->status, &d->stmt, FBVERSION, d->inda);
        if (d->isError(QT_TRANSLATE_NOOP("QIBaseResult",
                        "Could not describe input statement"), QSqlError::StatementError))
            return false;
    }
    initDA(d->inda);
    if (d->sqlda->sqld > d->sqlda->sqln) {
        // need more field descriptors
        enlargeDA(d->sqlda, d->sqlda->sqld);
        if (d->sqlda == (XSQLDA*)0) {
            qWarning()<<"QIOBaseResult: enlargeDA(): failed to allocate memory";
            return false;
        }

        isc_dsql_describe(d->status, &d->stmt, FBVERSION, d->sqlda);
        if (d->isError(QT_TRANSLATE_NOOP("QIBaseResult", "Could not describe statement"),
                       QSqlError::StatementError))
            return false;
    }
    initDA(d->sqlda);

    setSelect(d->isSelect());
    if (!isSelect()) {
        free(d->sqlda);
        d->sqlda = 0;
    }

    return true;
}


bool QIBaseResult::exec()
{
    bool ok = true;

    if (!d->trans)
        d->transaction();

    if (!driver() || !driver()->isOpen() || driver()->isOpenError())
        return false;
    setActive(false);
    setAt(QSql::BeforeFirstRow);

    if (d->inda) {
        QVector<QVariant>& values = boundValues();
        int i;
        if (values.count() > d->inda->sqld) {
            qWarning("QIBaseResult::exec: Parameter mismatch, expected %d, got %d parameters",
                     d->inda->sqld, values.count());
            return false;
        }
        int para = 0;
        for (i = 0; i < values.count(); ++i) {
            para = i;
            if (!d->inda->sqlvar[para].sqldata)
                // skip unknown datatypes
                continue;
            const QVariant val(values[i]);
            if (d->inda->sqlvar[para].sqltype & 1) {
                if (val.isNull()) {
                    // set null indicator
                    *(d->inda->sqlvar[para].sqlind) = -1;
                    // and set the value to 0, otherwise it would count as empty string.
                    // it seems to be working with just setting sqlind to -1
                    //*((char*)d->inda->sqlvar[para].sqldata) = 0;
                    continue;
                }
                // a value of 0 means non-null.
                *(d->inda->sqlvar[para].sqlind) = 0;
            }
            switch(d->inda->sqlvar[para].sqltype & ~1) {
            case SQL_INT64:
                if (d->inda->sqlvar[para].sqlscale < 0)
                    *((qint64*)d->inda->sqlvar[para].sqldata) =
                        (qint64)floor(0.5 + val.toDouble() * pow(10.0, d->inda->sqlvar[para].sqlscale * -1));
                else
                    *((qint64*)d->inda->sqlvar[para].sqldata) = val.toLongLong();
                break;
            case SQL_LONG:
                if (d->inda->sqlvar[para].sqlscale < 0)
                    *((long*)d->inda->sqlvar[para].sqldata) =
                        (long)floor(0.5 + val.toDouble() * pow(10.0, d->inda->sqlvar[para].sqlscale * -1));
                else
                    *((long*)d->inda->sqlvar[para].sqldata) = (long)val.toLongLong();
                break;
            case SQL_SHORT:
                if (d->inda->sqlvar[para].sqlscale < 0)
                    *((short*)d->inda->sqlvar[para].sqldata) =
                        (short)floor(0.5 + val.toDouble() * pow(10.0, d->inda->sqlvar[para].sqlscale * -1));
                else
                    *((short*)d->inda->sqlvar[para].sqldata) = (short)val.toInt();
                break;
            case SQL_FLOAT:
                *((float*)d->inda->sqlvar[para].sqldata) = (float)val.toDouble();
                break;
            case SQL_DOUBLE:
                *((double*)d->inda->sqlvar[para].sqldata) = val.toDouble();
                break;
            case SQL_TIMESTAMP:
                *((ISC_TIMESTAMP*)d->inda->sqlvar[para].sqldata) = toTimeStamp(val.toDateTime());
                break;
            case SQL_TYPE_TIME:
                *((ISC_TIME*)d->inda->sqlvar[para].sqldata) = toTime(val.toTime());
                break;
            case SQL_TYPE_DATE:
                *((ISC_DATE*)d->inda->sqlvar[para].sqldata) = toDate(val.toDate());
                break;
            case SQL_VARYING:
            case SQL_TEXT:
                qFillBufferWithString(d->inda->sqlvar[para].sqldata, val.toString(),
                                      d->inda->sqlvar[para].sqllen,
                                      (d->inda->sqlvar[para].sqltype & ~1) == SQL_VARYING, false, d->tc);
                break;
            case SQL_BLOB:
                    ok &= d->writeBlob(para, val.toByteArray());
                    break;
            case SQL_ARRAY:
                    ok &= d->writeArray(para, val.toList());
                    break;
            default:
                    qWarning("QIBaseResult::exec: Unknown datatype %d",
                             d->inda->sqlvar[para].sqltype & ~1);
                    break;
            }
        }
    }

    if (ok) {
        if (colCount() && d->queryType != isc_info_sql_stmt_exec_procedure) {
            isc_dsql_free_statement(d->status, &d->stmt, DSQL_close);
            if (d->isError(QT_TRANSLATE_NOOP("QIBaseResult", "Unable to close statement")))
                return false;
            cleanup();
        }
        if (d->queryType == isc_info_sql_stmt_exec_procedure)
            isc_dsql_execute2(d->status, &d->trans, &d->stmt, FBVERSION, d->inda, d->sqlda);
        else
            isc_dsql_execute(d->status, &d->trans, &d->stmt, FBVERSION, d->inda);
        if (d->isError(QT_TRANSLATE_NOOP("QIBaseResult", "Unable to execute query")))
            return false;

        // Not all stored procedures necessarily return values.
        if (d->queryType == isc_info_sql_stmt_exec_procedure && d->sqlda && d->sqlda->sqld == 0)
            delDA(d->sqlda);

        if (d->sqlda)
            init(d->sqlda->sqld);

        if (!isSelect())
             d->commit();

        setActive(true);
        return true;
    }
    return false;
}

bool QIBaseResult::reset (const QString& query)
{
    if (!prepare(query))
        return false;
    return exec();
}

bool QIBaseResult::gotoNext(QSqlCachedResult::ValueCache& row, int rowIdx)
{
    ISC_STATUS stat = 0;

    // Stored Procedures are special - they populate our d->sqlda when executing,
    // so we don't have to call isc_dsql_fetch
    if (d->queryType == isc_info_sql_stmt_exec_procedure) {
        // the first "fetch" shall succeed, all consecutive ones will fail since
        // we only have one row to fetch for stored procedures
        if (rowIdx != 0)
            stat = 100;
    } else {
        stat = isc_dsql_fetch(d->status, &d->stmt, FBVERSION, d->sqlda);
    }

    if (stat == 100) {
        // no more rows
        setAt(QSql::AfterLastRow);
        return false;
    }
    if (d->isError(QT_TRANSLATE_NOOP("QIBaseResult", "Could not fetch next item"),
                   QSqlError::StatementError))
        return false;
    if (rowIdx < 0) // not interested in actual values
        return true;

    for (int i = 0; i < d->sqlda->sqld; ++i) {
        int idx = rowIdx + i;
        char *buf = d->sqlda->sqlvar[i].sqldata;
        int size = d->sqlda->sqlvar[i].sqllen;
        Q_ASSERT(buf);

        if ((d->sqlda->sqlvar[i].sqltype & 1) && *d->sqlda->sqlvar[i].sqlind) {
            // null value
            QVariant v;
            v.convert(qIBaseTypeName2(d->sqlda->sqlvar[i].sqltype, d->sqlda->sqlvar[i].sqlscale < 0));
            if(v.type() == QVariant::Double) {
                switch(numericalPrecisionPolicy()) {
                case QSql::LowPrecisionInt32:
                    v.convert(QVariant::Int);
                    break;
                case QSql::LowPrecisionInt64:
                    v.convert(QVariant::LongLong);
                    break;
                case QSql::HighPrecision:
                    v.convert(QVariant::String);
                    break;
                }
            }
            row[idx] = v;
            continue;
        }

        switch(d->sqlda->sqlvar[i].sqltype & ~1) {
        case SQL_VARYING:
            // pascal strings - a short with a length information followed by the data
            if (d->tc)
                row[idx] = d->tc->toUnicode(buf + sizeof(short), *(short*)buf);
            else
                row[idx] = QString::fromUtf8(buf + sizeof(short), *(short*)buf);
            break;
        case SQL_INT64:
            if (d->sqlda->sqlvar[i].sqlscale < 0)
                row[idx] = *(qint64*)buf * pow(10.0, d->sqlda->sqlvar[i].sqlscale);
            else
                row[idx] = QVariant(*(qint64*)buf);
            break;
        case SQL_LONG:
            if (d->sqlda->sqlvar[i].sqllen == 4)
                if (d->sqlda->sqlvar[i].sqlscale < 0)
                    row[idx] = QVariant(*(qint32*)buf * pow(10.0, d->sqlda->sqlvar[i].sqlscale));
                else
                    row[idx] = QVariant(*(qint32*)buf);
            else
                row[idx] = QVariant(*(qint64*)buf);
            break;
        case SQL_SHORT:
            if (d->sqlda->sqlvar[i].sqlscale < 0)
                row[idx] = QVariant(long((*(short*)buf)) * pow(10.0, d->sqlda->sqlvar[i].sqlscale));
            else
                row[idx] = QVariant(int((*(short*)buf)));
            break;
        case SQL_FLOAT:
            row[idx] = QVariant(double((*(float*)buf)));
            break;
        case SQL_DOUBLE:
            row[idx] = QVariant(*(double*)buf);
            break;
        case SQL_TIMESTAMP:
            row[idx] = fromTimeStamp(buf);
            break;
        case SQL_TYPE_TIME:
            row[idx] = fromTime(buf);
            break;
        case SQL_TYPE_DATE:
            row[idx] = fromDate(buf);
            break;
        case SQL_TEXT:
            if (d->tc)
                row[idx] = d->tc->toUnicode(buf, size);
            else
                row[idx] = QString::fromUtf8(buf, size);
            break;
        case SQL_BLOB:
            row[idx] = d->fetchBlob((ISC_QUAD*)buf);
            break;
        case SQL_ARRAY:
            row[idx] = d->fetchArray(i, (ISC_QUAD*)buf);
            break;
        default:
            // unknown type - don't even try to fetch
            row[idx] = QVariant();
            break;
        }
        if (d->sqlda->sqlvar[i].sqlscale < 0) {
            QVariant v = row[idx];
            switch(numericalPrecisionPolicy()) {
            case QSql::LowPrecisionInt32:
                if(v.convert(QVariant::Int))
                    row[idx]=v;
                break;
            case QSql::LowPrecisionInt64:
                if(v.convert(QVariant::LongLong))
                    row[idx]=v;
                break;
            case QSql::LowPrecisionDouble:
                if(v.convert(QVariant::Double))
                    row[idx]=v;
                break;
            case QSql::HighPrecision:
                if(v.convert(QVariant::String))
                    row[idx]=v;
                break;
            }
        }
    }

    return true;
}

int QIBaseResult::size()
{
    return -1;

#if 0 /// ### FIXME
    static char sizeInfo[] = {isc_info_sql_records};
    char buf[64];

    //qDebug() << sizeInfo;
    if (!isActive() || !isSelect())
        return -1;

        char ct;
        short len;
        int val = 0;
//    while(val == 0) {
        isc_dsql_sql_info(d->status, &d->stmt, sizeof(sizeInfo), sizeInfo, sizeof(buf), buf);
//        isc_database_info(d->status, &d->ibase, sizeof(sizeInfo), sizeInfo, sizeof(buf), buf);

        for(int i = 0; i < 66; ++i)
            qDebug() << QString::number(buf[i]);

        for (char* c = buf + 3; *c != isc_info_end; /*nothing*/) {
            ct = *(c++);
            len = isc_vax_integer(c, 2);
            c += 2;
            val = isc_vax_integer(c, len);
            c += len;
            qDebug() << "size" << val;
            if (ct == isc_info_req_select_count)
                return val;
        }
        //qDebug() << "size -1";
        return -1;

        unsigned int i, result_size;
        if (buf[0] == isc_info_sql_records) {
            i = 3;
            result_size = isc_vax_integer(&buf[1],2);
            while (buf[i] != isc_info_end && i < result_size) {
                len = (short)isc_vax_integer(&buf[i+1],2);
                if (buf[i] == isc_info_req_select_count)
                     return (isc_vax_integer(&buf[i+3],len));
                i += len+3;
           }
        }
//    }
    return -1;
#endif
}

int QIBaseResult::numRowsAffected()
{
    static char acCountInfo[] = {isc_info_sql_records};
    char cCountType;

    switch (d->queryType) {
    case isc_info_sql_stmt_select:
        cCountType = isc_info_req_select_count;
        break;
    case isc_info_sql_stmt_update:
        cCountType = isc_info_req_update_count;
        break;
    case isc_info_sql_stmt_delete:
        cCountType = isc_info_req_delete_count;
        break;
    case isc_info_sql_stmt_insert:
        cCountType = isc_info_req_insert_count;
        break;
    default:
        qWarning() << "numRowsAffected: Unknown statement type (" << d->queryType << ")";
        return -1;
    }

    char acBuffer[33];
    int iResult = -1;
    isc_dsql_sql_info(d->status, &d->stmt, sizeof(acCountInfo), acCountInfo, sizeof(acBuffer), acBuffer);
    if (d->isError(QT_TRANSLATE_NOOP("QIBaseResult", "Could not get statement info"),
                   QSqlError::StatementError))
        return -1;
    for (char *pcBuf = acBuffer + 3; *pcBuf != isc_info_end; /*nothing*/) {
        char cType = *pcBuf++;
        short sLength = isc_vax_integer (pcBuf, 2);
        pcBuf += 2;
        int iValue = isc_vax_integer (pcBuf, sLength);
        pcBuf += sLength;

        if (cType == cCountType) {
            iResult = iValue;
            break;
        }
    }
    return iResult;
}

QSqlRecord QIBaseResult::record() const
{
    QSqlRecord rec;
    if (!isActive() || !d->sqlda)
        return rec;

    XSQLVAR v;
    for (int i = 0; i < d->sqlda->sqld; ++i) {
        v = d->sqlda->sqlvar[i];
        QSqlField f(QString::fromLatin1(v.aliasname, v.aliasname_length).simplified(),
                    qIBaseTypeName2(v.sqltype, v.sqlscale < 0));
        f.setLength(v.sqllen);
        f.setPrecision(qAbs(v.sqlscale));
        f.setRequiredStatus((v.sqltype & 1) == 0 ? QSqlField::Required : QSqlField::Optional);
        if(v.sqlscale < 0) {
            QSqlQuery q(new QIBaseResult(d->db));
            q.setForwardOnly(true);
            q.exec(QLatin1String("select b.RDB$FIELD_PRECISION, b.RDB$FIELD_SCALE, b.RDB$FIELD_LENGTH, a.RDB$NULL_FLAG "
                    "FROM RDB$RELATION_FIELDS a, RDB$FIELDS b "
                    "WHERE b.RDB$FIELD_NAME = a.RDB$FIELD_SOURCE "
                    "AND a.RDB$RELATION_NAME = '") + QString::fromAscii(v.relname, v.relname_length).toUpper() + QLatin1String("' "
                    "AND a.RDB$FIELD_NAME = '") + QString::fromAscii(v.sqlname, v.sqlname_length).toUpper() + QLatin1String("' "));
            if(q.first()) {
                if(v.sqlscale < 0) {
                    f.setLength(q.value(0).toInt());
                    f.setPrecision(qAbs(q.value(1).toInt()));
                } else {
                    f.setLength(q.value(2).toInt());
                    f.setPrecision(0);
                }
                f.setRequiredStatus(q.value(3).toBool() ? QSqlField::Required : QSqlField::Optional);
            }
        }
        f.setSqlType(v.sqltype);
        rec.append(f);
    }
    return rec;
}

QVariant QIBaseResult::handle() const
{
    return QVariant(qRegisterMetaType<isc_stmt_handle>("isc_stmt_handle"), &d->stmt);
}

/*********************************/

QIBaseDriver::QIBaseDriver(QObject * parent)
    : QSqlDriver(parent)
{
    d = new QIBaseDriverPrivate(this);
}

QIBaseDriver::QIBaseDriver(isc_db_handle connection, QObject *parent)
    : QSqlDriver(parent)
{
    d = new QIBaseDriverPrivate(this);
    d->ibase = connection;
    setOpen(true);
    setOpenError(false);
}

QIBaseDriver::~QIBaseDriver()
{
    delete d;
}

bool QIBaseDriver::hasFeature(DriverFeature f) const
{
    switch (f) {
    case QuerySize:
    case NamedPlaceholders:
    case LastInsertId:
    case BatchOperations:
    case SimpleLocking:
    case FinishQuery:
    case MultipleResultSets:
        return false;
    case Transactions:
    case PreparedQueries:
    case PositionalPlaceholders:
    case Unicode:
    case BLOB:
    case EventNotifications:
    case LowPrecisionNumbers:
        return true;
    }
    return false;
}

bool QIBaseDriver::open(const QString & db,
          const QString & user,
          const QString & password,
          const QString & host,
          int /*port*/,
          const QString & connOpts)
{
    if (isOpen())
        close();

    const QStringList opts(connOpts.split(QLatin1Char(';'), QString::SkipEmptyParts));

    QString encString;
    QByteArray role;
    for (int i = 0; i < opts.count(); ++i) {
        QString tmp(opts.at(i).simplified());
        int idx;
        if ((idx = tmp.indexOf(QLatin1Char('='))) != -1) {
            QString val = tmp.mid(idx + 1).simplified();
            QString opt = tmp.left(idx).simplified();
            if (opt.toUpper() == QLatin1String("ISC_DPB_LC_CTYPE"))
                encString = val;
            else if (opt.toUpper() == QLatin1String("ISC_DPB_SQL_ROLE_NAME")) {
                role = val.toLocal8Bit();
                role.truncate(255);
            }
        }
    }

    // Use UNICODE_FSS when no ISC_DPB_LC_CTYPE is provided
    if (encString.isEmpty())
        encString = QLatin1String("UNICODE_FSS");
    else {
        d->tc = QTextCodec::codecForName(encString.toLocal8Bit());
        if (!d->tc) {
            qWarning("Unsupported encoding: %s. Using UNICODE_FFS for ISC_DPB_LC_CTYPE.", encString.toLocal8Bit().constData());
            encString = QLatin1String("UNICODE_FSS"); // Fallback to UNICODE_FSS
        }
    }

    QByteArray enc = encString.toLocal8Bit();
    QByteArray usr = user.toLocal8Bit();
    QByteArray pass = password.toLocal8Bit();
    enc.truncate(255);
    usr.truncate(255);
    pass.truncate(255);

    QByteArray ba;
    ba.resize(usr.length() + pass.length() + enc.length() + role.length() + 6);
    int i = -1;
    ba[++i] = isc_dpb_version1;
    ba[++i] = isc_dpb_user_name;
    ba[++i] = usr.length();
    memcpy(ba.data() + ++i, usr.data(), usr.length());
    i += usr.length();
    ba[i] = isc_dpb_password;
    ba[++i] = pass.length();
    memcpy(ba.data() + ++i, pass.data(), pass.length());
    i += pass.length();
    ba[i] = isc_dpb_lc_ctype;
    ba[++i] = enc.length();
    memcpy(ba.data() + ++i, enc.data(), enc.length());
    i += enc.length();

    if (!role.isEmpty()) {
        ba[i] = isc_dpb_sql_role_name;
        ba[++i] = role.length();
        memcpy(ba.data() + ++i, role.data(), role.length());
        i += role.length();
    }

    QString ldb;
    if (!host.isEmpty())
        ldb += host + QLatin1Char(':');
    ldb += db;
    isc_attach_database(d->status, 0, const_cast<char *>(ldb.toLocal8Bit().constData()),
                        &d->ibase, i, ba.data());
    if (d->isError(QT_TRANSLATE_NOOP("QIBaseDriver", "Error opening database"),
                   QSqlError::ConnectionError)) {
        setOpenError(true);
        return false;
    }

    setOpen(true);
    return true;
}

void QIBaseDriver::close()
{
    if (isOpen()) {

        if (d->eventBuffers.size()) {
            ISC_STATUS status[20];
            QMap<QString, QIBaseEventBuffer *>::const_iterator i;
            for (i = d->eventBuffers.constBegin(); i != d->eventBuffers.constEnd(); ++i) {
                QIBaseEventBuffer *eBuffer = i.value();
                eBuffer->subscriptionState = QIBaseEventBuffer::Finished;
                isc_cancel_events(status, &d->ibase, &eBuffer->eventId);
                qFreeEventBuffer(eBuffer);
            }
            d->eventBuffers.clear();

#if defined(FB_API_VER)
            // Workaround for Firebird crash
            QTime timer;
            timer.start();
            while (timer.elapsed() < 500)
                QCoreApplication::processEvents();
#endif
        }

        isc_detach_database(d->status, &d->ibase);
        d->ibase = 0;
        setOpen(false);
        setOpenError(false);
    }
}

QSqlResult *QIBaseDriver::createResult() const
{
    return new QIBaseResult(this);
}

bool QIBaseDriver::beginTransaction()
{
    if (!isOpen() || isOpenError())
        return false;
    if (d->trans)
        return false;

    isc_start_transaction(d->status, &d->trans, 1, &d->ibase, 0, NULL);
    return !d->isError(QT_TRANSLATE_NOOP("QIBaseDriver", "Could not start transaction"),
                       QSqlError::TransactionError);
}

bool QIBaseDriver::commitTransaction()
{
    if (!isOpen() || isOpenError())
        return false;
    if (!d->trans)
        return false;

    isc_commit_transaction(d->status, &d->trans);
    d->trans = 0;
    return !d->isError(QT_TRANSLATE_NOOP("QIBaseDriver", "Unable to commit transaction"),
                       QSqlError::TransactionError);
}

bool QIBaseDriver::rollbackTransaction()
{
    if (!isOpen() || isOpenError())
        return false;
    if (!d->trans)
        return false;

    isc_rollback_transaction(d->status, &d->trans);
    d->trans = 0;
    return !d->isError(QT_TRANSLATE_NOOP("QIBaseDriver", "Unable to rollback transaction"),
                       QSqlError::TransactionError);
}

QStringList QIBaseDriver::tables(QSql::TableType type) const
{
    QStringList res;
    if (!isOpen())
        return res;

    QString typeFilter;

    if (type == QSql::SystemTables) {
        typeFilter += QLatin1String("RDB$SYSTEM_FLAG != 0");
    } else if (type == (QSql::SystemTables | QSql::Views)) {
        typeFilter += QLatin1String("RDB$SYSTEM_FLAG != 0 OR RDB$VIEW_BLR NOT NULL");
    } else {
        if (!(type & QSql::SystemTables))
            typeFilter += QLatin1String("RDB$SYSTEM_FLAG = 0 AND ");
        if (!(type & QSql::Views))
            typeFilter += QLatin1String("RDB$VIEW_BLR IS NULL AND ");
        if (!(type & QSql::Tables))
            typeFilter += QLatin1String("RDB$VIEW_BLR IS NOT NULL AND ");
        if (!typeFilter.isEmpty())
            typeFilter.chop(5);
    }
    if (!typeFilter.isEmpty())
        typeFilter.prepend(QLatin1String("where "));

    QSqlQuery q(createResult());
    q.setForwardOnly(true);
    if (!q.exec(QLatin1String("select rdb$relation_name from rdb$relations ") + typeFilter))
        return res;
    while(q.next())
            res << q.value(0).toString().simplified();

    return res;
}

QSqlRecord QIBaseDriver::record(const QString& tablename) const
{
    QSqlRecord rec;
    if (!isOpen())
        return rec;

    QSqlQuery q(createResult());
    q.setForwardOnly(true);
    QString table = tablename;
    if (isIdentifierEscaped(table, QSqlDriver::TableName))
        table = stripDelimiters(table, QSqlDriver::TableName);
    else
        table = table.toUpper();
    q.exec(QLatin1String("SELECT a.RDB$FIELD_NAME, b.RDB$FIELD_TYPE, b.RDB$FIELD_LENGTH, "
           "b.RDB$FIELD_SCALE, b.RDB$FIELD_PRECISION, a.RDB$NULL_FLAG "
           "FROM RDB$RELATION_FIELDS a, RDB$FIELDS b "
           "WHERE b.RDB$FIELD_NAME = a.RDB$FIELD_SOURCE "
           "AND a.RDB$RELATION_NAME = '") + table + QLatin1String("' "
           "ORDER BY a.RDB$FIELD_POSITION"));

    while (q.next()) {
        int type = q.value(1).toInt();
        bool hasScale = q.value(3).toInt() < 0;
        QSqlField f(q.value(0).toString().simplified(), qIBaseTypeName(type, hasScale));
        if(hasScale) {
            f.setLength(q.value(4).toInt());
            f.setPrecision(qAbs(q.value(3).toInt()));
        } else {
            f.setLength(q.value(2).toInt());
            f.setPrecision(0);
        }
        f.setRequired(q.value(5).toInt() > 0 ? true : false);
        f.setSqlType(type);

        rec.append(f);
    }
    return rec;
}

QSqlIndex QIBaseDriver::primaryIndex(const QString &table) const
{
    QSqlIndex index(table);
    if (!isOpen())
        return index;

    QString tablename = table;
    if (isIdentifierEscaped(tablename, QSqlDriver::TableName))
        tablename = stripDelimiters(tablename, QSqlDriver::TableName);
    else
        tablename = tablename.toUpper();

    QSqlQuery q(createResult());
    q.setForwardOnly(true);
    q.exec(QLatin1String("SELECT a.RDB$INDEX_NAME, b.RDB$FIELD_NAME, d.RDB$FIELD_TYPE, d.RDB$FIELD_SCALE "
           "FROM RDB$RELATION_CONSTRAINTS a, RDB$INDEX_SEGMENTS b, RDB$RELATION_FIELDS c, RDB$FIELDS d "
           "WHERE a.RDB$CONSTRAINT_TYPE = 'PRIMARY KEY' "
           "AND a.RDB$RELATION_NAME = '") + tablename +
           QLatin1String(" 'AND a.RDB$INDEX_NAME = b.RDB$INDEX_NAME "
           "AND c.RDB$RELATION_NAME = a.RDB$RELATION_NAME "
           "AND c.RDB$FIELD_NAME = b.RDB$FIELD_NAME "
           "AND d.RDB$FIELD_NAME = c.RDB$FIELD_SOURCE "
           "ORDER BY b.RDB$FIELD_POSITION"));

    while (q.next()) {
        QSqlField field(q.value(1).toString().simplified(), qIBaseTypeName(q.value(2).toInt(), q.value(3).toInt() < 0));
        index.append(field); //TODO: asc? desc?
        index.setName(q.value(0).toString());
    }

    return index;
}

QString QIBaseDriver::formatValue(const QSqlField &field, bool trimStrings) const
{
    switch (field.type()) {
    case QVariant::DateTime: {
        QDateTime datetime = field.value().toDateTime();
        if (datetime.isValid())
            return QLatin1Char('\'') + QString::number(datetime.date().year()) + QLatin1Char('-') +
                QString::number(datetime.date().month()) + QLatin1Char('-') +
                QString::number(datetime.date().day()) + QLatin1Char(' ') +
                QString::number(datetime.time().hour()) + QLatin1Char(':') +
                QString::number(datetime.time().minute()) + QLatin1Char(':') +
                QString::number(datetime.time().second()) + QLatin1Char('.') +
                QString::number(datetime.time().msec()).rightJustified(3, QLatin1Char('0'), true) +
		QLatin1Char('\'');
        else
            return QLatin1String("NULL");
    }
    case QVariant::Time: {
        QTime time = field.value().toTime();
        if (time.isValid())
            return QLatin1Char('\'') + QString::number(time.hour()) + QLatin1Char(':') +
                QString::number(time.minute()) + QLatin1Char(':') +
                QString::number(time.second()) + QLatin1Char('.') +
                QString::number(time.msec()).rightJustified(3, QLatin1Char('0'), true) +
                QLatin1Char('\'');
        else
            return QLatin1String("NULL");
    }
    case QVariant::Date: {
        QDate date = field.value().toDate();
        if (date.isValid())
            return QLatin1Char('\'') + QString::number(date.year()) + QLatin1Char('-') +
                QString::number(date.month()) + QLatin1Char('-') +
                QString::number(date.day()) + QLatin1Char('\'');
            else
                return QLatin1String("NULL");
    }
    default:
        return QSqlDriver::formatValue(field, trimStrings);
    }
}

QVariant QIBaseDriver::handle() const
{
    return QVariant(qRegisterMetaType<isc_db_handle>("isc_db_handle"), &d->ibase);
}

#if defined(FB_API_VER) && FB_API_VER >= 20
static ISC_EVENT_CALLBACK qEventCallback(char *result, ISC_USHORT length, const ISC_UCHAR *updated)
#else
static isc_callback qEventCallback(char *result, short length, char *updated)
#endif
{
    if (!updated)
        return 0;


    memcpy(result, updated, length);
    qMutex()->lock();
    QIBaseDriver *driver = qBufferDriverMap()->value(result);
    qMutex()->unlock();

    // We use an asynchronous call (i.e., queued connection) because the event callback
    // is executed in a different thread than the one in which the driver lives.
    if (driver)
        QMetaObject::invokeMethod(driver, "qHandleEventNotification", Qt::QueuedConnection, Q_ARG(void *, reinterpret_cast<void *>(result)));

    return 0;
}

bool QIBaseDriver::subscribeToNotificationImplementation(const QString &name)
{
    if (!isOpen()) {
        qWarning("QIBaseDriver::subscribeFromNotificationImplementation: database not open.");
        return false;
    }

    if (d->eventBuffers.contains(name)) {
        qWarning("QIBaseDriver::subscribeToNotificationImplementation: already subscribing to '%s'.",
            qPrintable(name));
        return false;
    }

    QIBaseEventBuffer *eBuffer = new QIBaseEventBuffer;
    eBuffer->subscriptionState = QIBaseEventBuffer::Starting;
    eBuffer->bufferLength = isc_event_block(&eBuffer->eventBuffer,
                                            &eBuffer->resultBuffer,
                                            1,
                                            name.toLocal8Bit().constData());

    qMutex()->lock();
    qBufferDriverMap()->insert(eBuffer->resultBuffer, this);
    qMutex()->unlock();

    d->eventBuffers.insert(name, eBuffer);

    ISC_STATUS status[20];
    isc_que_events(status,
                   &d->ibase,
                   &eBuffer->eventId,
                   eBuffer->bufferLength,
                   eBuffer->eventBuffer,
#if defined (FB_API_VER) && FB_API_VER >= 20
                   (ISC_EVENT_CALLBACK)qEventCallback,
#else
                   (isc_callback)qEventCallback,
#endif
                   eBuffer->resultBuffer);

    if (status[0] == 1 && status[1]) {
        setLastError(QSqlError(QString::fromLatin1("Could not subscribe to event notifications for %1.").arg(name)));
        d->eventBuffers.remove(name);
        qFreeEventBuffer(eBuffer);
        return false;
    }

    return true;
}

bool QIBaseDriver::unsubscribeFromNotificationImplementation(const QString &name)
{
    if (!isOpen()) {
        qWarning("QIBaseDriver::unsubscribeFromNotificationImplementation: database not open.");
        return false;
    }

    if (!d->eventBuffers.contains(name)) {
        qWarning("QIBaseDriver::QIBaseSubscriptionState not subscribed to '%s'.",
            qPrintable(name));
        return false;
    }

    QIBaseEventBuffer *eBuffer = d->eventBuffers.value(name);
    ISC_STATUS status[20];
    eBuffer->subscriptionState = QIBaseEventBuffer::Finished;
    isc_cancel_events(status, &d->ibase, &eBuffer->eventId);

    if (status[0] == 1 && status[1]) {
        setLastError(QSqlError(QString::fromLatin1("Could not unsubscribe from event notifications for %1.").arg(name)));
        return false;
    }

    d->eventBuffers.remove(name);
    qFreeEventBuffer(eBuffer);

    return true;
}

QStringList QIBaseDriver::subscribedToNotificationsImplementation() const
{
    return QStringList(d->eventBuffers.keys());
}

void QIBaseDriver::qHandleEventNotification(void *updatedResultBuffer)
{
    QMap<QString, QIBaseEventBuffer *>::const_iterator i;
    for (i = d->eventBuffers.constBegin(); i != d->eventBuffers.constEnd(); ++i) {
        QIBaseEventBuffer* eBuffer = i.value();
        if (reinterpret_cast<void *>(eBuffer->resultBuffer) != updatedResultBuffer)
            continue;

        ISC_ULONG counts[20];
        memset(counts, 0, sizeof(counts));
        isc_event_counts(counts, eBuffer->bufferLength, eBuffer->eventBuffer, eBuffer->resultBuffer);
        if (counts[0]) {

            if (eBuffer->subscriptionState == QIBaseEventBuffer::Subscribed)
                emit notification(i.key());
            else if (eBuffer->subscriptionState == QIBaseEventBuffer::Starting)
                eBuffer->subscriptionState = QIBaseEventBuffer::Subscribed;

            ISC_STATUS status[20];
            isc_que_events(status,
                           &d->ibase,
                           &eBuffer->eventId,
                           eBuffer->bufferLength,
                           eBuffer->eventBuffer,
#if defined (FB_API_VER) && FB_API_VER >= 20
                                    (ISC_EVENT_CALLBACK)qEventCallback,
#else
                                    (isc_callback)qEventCallback,
#endif
                                   eBuffer->resultBuffer);
            if (status[0] == 1 && status[1]) {
                qCritical("QIBaseDriver::qHandleEventNotification: could not resubscribe to '%s'",
                    qPrintable(i.key()));
            }

            return;
        }
    }
}

QString QIBaseDriver::escapeIdentifier(const QString &identifier, IdentifierType) const
{
    QString res = identifier;
    if(!identifier.isEmpty() && !identifier.startsWith(QLatin1Char('"')) && !identifier.endsWith(QLatin1Char('"')) ) {
        res.replace(QLatin1Char('"'), QLatin1String("\"\""));
        res.prepend(QLatin1Char('"')).append(QLatin1Char('"'));
        res.replace(QLatin1Char('.'), QLatin1String("\".\""));
    }
    return res;
}

QT_END_NAMESPACE