summaryrefslogtreecommitdiffstats
path: root/src/corelib/io/qdir.cpp
blob: 4ba8e966689c4a0037baf27166313215c484359a (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
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights.  These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qplatformdefs.h"
#include "qdir.h"
#include "qabstractfileengine.h"
#ifndef QT_NO_DEBUG_STREAM
#include "qdebug.h"
#endif
#include "qfsfileengine.h"
#include "qdatetime.h"
#include "qstring.h"
#include "qregexp.h"
#include "qvector.h"
#include "qalgorithms.h"
#ifdef QT_BUILD_CORE_LIB
# include "qresource.h"
#endif

#include "../kernel/qcoreglobaldata_p.h"
#include <stdlib.h>

QT_BEGIN_NAMESPACE

static QString driveSpec(const QString &path)
{
#ifdef Q_OS_WIN
    if (path.size() < 2)
        return QString();
    char c = path.at(0).toAscii();
    if (c < 'a' && c > 'z' && c < 'A' && c > 'Z')
        return QString();
    if (path.at(1).toAscii() != ':')
        return QString();
    return path.mid(0, 2);
#else
    Q_UNUSED(path);
    return QString();
#endif
}

//************* QDirPrivate
class QDirPrivate
{
    QDir *q_ptr;
    Q_DECLARE_PUBLIC(QDir)

protected:
    QDirPrivate(QDir*, const QDir *copy=0);
    ~QDirPrivate();

    QString initFileEngine(const QString &file);

    void updateFileLists() const;
    void sortFileList(QDir::SortFlags, QStringList &, QStringList *, QFileInfoList *) const;

private:
#ifdef QT3_SUPPORT
    QChar filterSepChar;
    bool matchAllDirs;
#endif
    static inline QChar getFilterSepChar(const QString &nameFilter)
    {
        QChar sep(QLatin1Char(';'));
        int i = nameFilter.indexOf(sep, 0);
        if (i == -1 && nameFilter.indexOf(QLatin1Char(' '), 0) != -1)
            sep = QChar(QLatin1Char(' '));
        return sep;
    }
    static inline QStringList splitFilters(const QString &nameFilter, QChar sep=0) {
        if(sep == 0)
            sep = getFilterSepChar(nameFilter);
        QStringList ret = nameFilter.split(sep);
        for(int i = 0; i < ret.count(); i++)
            ret[i] = ret[i].trimmed();
        return ret;
    }

    struct Data {
        inline Data()
            : ref(1), fileEngine(0)
        { clear(); }
        inline Data(const Data &copy)
            : ref(1), path(copy.path), nameFilters(copy.nameFilters), sort(copy.sort),
              filters(copy.filters), fileEngine(0)
        { clear(); }
        inline ~Data()
        { delete fileEngine; }

        inline void clear() {
            listsDirty = 1;
        }
        mutable QAtomicInt ref;

        QString path;
        QStringList nameFilters;
        QDir::SortFlags sort;
        QDir::Filters filters;

        mutable QAbstractFileEngine *fileEngine;

        mutable uint listsDirty : 1;
        mutable QStringList files;
        mutable QFileInfoList fileInfos;
    } *data;
    inline void setPath(const QString &p)
    {
        detach(false);
        QString path = p;
        if ((path.endsWith(QLatin1Char('/')) || path.endsWith(QLatin1Char('\\')))
                && path.length() > 1) {
#ifdef Q_OS_WIN
            if (!(path.length() == 3 && path.at(1) == QLatin1Char(':')))
#endif
                path.truncate(path.length() - 1);
        }
        if(!data->fileEngine || !QDir::isRelativePath(path))
            path = initFileEngine(path);
        data->fileEngine->setFileName(path);
        // set the path to be the qt friendly version so then we can operate on it using just /
        data->path = data->fileEngine->fileName(QAbstractFileEngine::DefaultName);
        data->clear();
    }
    inline void reset() {
        detach();
        data->clear();
    }
    void detach(bool createFileEngine = true);
};

QDirPrivate::QDirPrivate(QDir *qq, const QDir *copy) : q_ptr(qq)
#ifdef QT3_SUPPORT
                                                     , filterSepChar(0)
                                                     , matchAllDirs(false)
#endif
{
    if(copy) {
        copy->d_func()->data->ref.ref();
        data = copy->d_func()->data;
    } else {
        data = new QDirPrivate::Data;
        data->clear();
    }
}

QDirPrivate::~QDirPrivate()
{
    if (!data->ref.deref())
        delete data;
    data = 0;
    q_ptr = 0;
}

/* For sorting */
struct QDirSortItem {
    mutable QString filename_cache;
    mutable QString suffix_cache;
    QFileInfo item;
};


class QDirSortItemComparator {
    int qt_cmp_si_sort_flags;
public:
    QDirSortItemComparator(int flags) : qt_cmp_si_sort_flags(flags) {}
    bool operator()(const QDirSortItem &, const QDirSortItem &);
};

bool QDirSortItemComparator::operator()(const QDirSortItem &n1, const QDirSortItem &n2)
{
    const QDirSortItem* f1 = &n1;
    const QDirSortItem* f2 = &n2;

    if ((qt_cmp_si_sort_flags & QDir::DirsFirst) && (f1->item.isDir() != f2->item.isDir()))
        return f1->item.isDir();
    if ((qt_cmp_si_sort_flags & QDir::DirsLast) && (f1->item.isDir() != f2->item.isDir()))
        return !f1->item.isDir();

    int r = 0;
    int sortBy = (qt_cmp_si_sort_flags & QDir::SortByMask)
                 | (qt_cmp_si_sort_flags & QDir::Type);

    switch (sortBy) {
      case QDir::Time:
        r = f1->item.lastModified().secsTo(f2->item.lastModified());
        break;
      case QDir::Size:
          r = int(qBound<qint64>(-1, f2->item.size() - f1->item.size(), 1));
        break;
      case QDir::Type:
      {
        bool ic = qt_cmp_si_sort_flags & QDir::IgnoreCase;

        if (f1->suffix_cache.isNull())
            f1->suffix_cache = ic ? f1->item.suffix().toLower()
                               : f1->item.suffix();
        if (f2->suffix_cache.isNull())
            f2->suffix_cache = ic ? f2->item.suffix().toLower()
                               : f2->item.suffix();

	r = qt_cmp_si_sort_flags & QDir::LocaleAware
            ? f1->suffix_cache.localeAwareCompare(f2->suffix_cache)
            : f1->suffix_cache.compare(f2->suffix_cache);
      }
        break;
      default:
        ;
    }

    if (r == 0 && sortBy != QDir::Unsorted) {
        // Still not sorted - sort by name
        bool ic = qt_cmp_si_sort_flags & QDir::IgnoreCase;

        if (f1->filename_cache.isNull())
            f1->filename_cache = ic ? f1->item.fileName().toLower()
                                    : f1->item.fileName();
        if (f2->filename_cache.isNull())
            f2->filename_cache = ic ? f2->item.fileName().toLower()
                                    : f2->item.fileName();

	r = qt_cmp_si_sort_flags & QDir::LocaleAware
            ? f1->filename_cache.localeAwareCompare(f2->filename_cache)
            : f1->filename_cache.compare(f2->filename_cache);
    }

    if (qt_cmp_si_sort_flags & QDir::Reversed)
        return r > 0;
    return r < 0;
}

inline void QDirPrivate::sortFileList(QDir::SortFlags sort, QStringList &l,
                                      QStringList *names, QFileInfoList *infos) const
{
    if(names)
        names->clear();
    if(infos)
        infos->clear();
    if(!l.isEmpty()) {
        QDirSortItem *si= new QDirSortItem[l.count()];
        int i;
        for (i = 0; i < l.size(); ++i) {
            QString path = data->path;
            if (!path.isEmpty() && !path.endsWith(QLatin1Char('/')))
                path += QLatin1Char('/');
            si[i].item = QFileInfo(path + l.at(i));
        }
        if ((sort & QDir::SortByMask) != QDir::Unsorted)
            qStableSort(si, si+i, QDirSortItemComparator(sort));
        // put them back in the list(s)
        for (int j = 0; j<i; j++) {
            if(infos)
                infos->append(si[j].item);
            if(names)
                names->append(si[j].item.fileName());
        }
        delete [] si;
    }
}

inline void QDirPrivate::updateFileLists() const
{
    if(data->listsDirty) {
        QStringList l = data->fileEngine->entryList(data->filters, data->nameFilters);
        sortFileList(data->sort, l, &data->files, &data->fileInfos);
        data->listsDirty = 0;
    }
}

QString QDirPrivate::initFileEngine(const QString &path)
{
    detach(false);
    delete data->fileEngine;
    data->fileEngine = 0;
    data->clear();
    data->fileEngine = QAbstractFileEngine::create(path);
    return data->fileEngine->fileName(QAbstractFileEngine::DefaultName);
}

void QDirPrivate::detach(bool createFileEngine)
{
    qAtomicDetach(data);
    if (createFileEngine) {
        delete data->fileEngine;
        data->fileEngine = QAbstractFileEngine::create(data->path);
    }
}

/*!
    \class QDir
    \brief The QDir class provides access to directory structures and their contents.

    \ingroup io
    \ingroup shared
    \reentrant
    \mainclass

    A QDir is used to manipulate path names, access information
    regarding paths and files, and manipulate the underlying file
    system. It can also be used to access Qt's \l{resource system}.

    Qt uses "/" as a universal directory separator in the same way
    that "/" is used as a path separator in URLs. If you always use
    "/" as a directory separator, Qt will translate your paths to
    conform to the underlying operating system.

    A QDir can point to a file using either a relative or an absolute
    path. Absolute paths begin with the directory separator
    (optionally preceded by a drive specification under Windows).
    Relative file names begin with a directory name or a file name and
    specify a path relative to the current directory.

    Examples of absolute paths:

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

    On Windows, the second example above will be translated to
    \c{C:\Documents and Settings} when used to access files.

    Examples of relative paths:

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

    You can use the isRelative() or isAbsolute() functions to check if
    a QDir is using a relative or an absolute file path. Call
    makeAbsolute() to convert a relative QDir to an absolute one.

    \section1 Navigation and Directory Operations

    A directory's path can be obtained with the path() function, and
    a new path set with the setPath() function. The absolute path to
    a directory is found by calling absolutePath().

    The name of a directory is found using the dirName() function. This
    typically returns the last element in the absolute path that specifies
    the location of the directory. However, it can also return "." if
    the QDir represents the current directory.

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

    The path for a directory can also be changed with the cd() and cdUp()
    functions, both of which operate like familiar shell commands.
    When cd() is called with the name of an existing directory, the QDir
    object changes directory so that it represents that directory instead.
    The cdUp() function changes the directory of the QDir object so that
    it refers to its parent directory; i.e. cd("..") is equivalent to
    cdUp().

    Directories can be created with mkdir(), renamed with rename(), and
    removed with rmdir().

    You can test for the presence of a directory with a given name by
    using exists(), and the properties of a directory can be tested with
    isReadable(), isAbsolute(), isRelative(), and isRoot().

    The refresh() function re-reads the directory's data from disk.

    \section1 Files and Directory Contents

    Directories contain a number of entries, representing files,
    directories, and symbolic links. The number of entries in a
    directory is returned by count().
    A string list of the names of all the entries in a directory can be
    obtained with entryList(). If you need information about each
    entry, use entryInfoList() to obtain a list of QFileInfo objects.

    Paths to files and directories within a directory can be
    constructed using filePath() and absoluteFilePath().
    The filePath() function returns a path to the specified file
    or directory relative to the path of the QDir object;
    absoluteFilePath() returns an absolute path to the specified
    file or directory. Neither of these functions checks for the
    existence of files or directory; they only construct paths.

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

    Files can be removed by using the remove() function. Directories
    cannot be removed in the same way as files; use rmdir() to remove
    them instead.

    It is possible to reduce the number of entries returned by
    entryList() and entryInfoList() by applying filters to a QDir object.
    You can apply a name filter to specify a pattern with wildcards that
    file names need to match, an attribute filter that selects properties
    of entries and can distinguish between files and directories, and a
    sort order.

    Name filters are lists of strings that are passed to setNameFilters().
    Attribute filters consist of a bitwise OR combination of Filters, and
    these are specified when calling setFilter().
    The sort order is specified using setSorting() with a bitwise OR
    combination of SortFlags.

    You can test to see if a filename matches a filter using the match()
    function.

    Filter and sort order flags may also be specified when calling
    entryList() and entryInfoList() in order to override previously defined
    behavior.

    \section1 The Current Directory and Other Special Paths

    Access to some common directories is provided with a number of static
    functions that return QDir objects. There are also corresponding functions
    for these that return strings:

    \table
    \header \o QDir      \o QString         \o Return Value
    \row    \o current() \o currentPath()   \o The application's working directory
    \row    \o home()    \o homePath()      \o The user's home directory
    \row    \o root()    \o rootPath()      \o The root directory
    \row    \o temp()    \o tempPath()      \o The system's temporary directory
    \endtable

    The setCurrent() static function can also be used to set the application's
    working directory.

    If you want to find the directory containing the application's executable,
    see \l{QCoreApplication::applicationDirPath()}.

    The drives() static function provides a list of root directories for each
    device that contains a filing system. On Unix systems this returns a list
    containing a single root directory "/"; on Windows the list will usually
    contain \c{C:/}, and possibly other drive letters such as \c{D:/}, depending
    on the configuration of the user's system.

    \section1 Path Manipulation and Strings

    Paths containing "." elements that reference the current directory at that
    point in the path, ".." elements that reference the parent directory, and
    symbolic links can be reduced to a canonical form using the canonicalPath()
    function.

    Paths can also be simplified by using cleanPath() to remove redundant "/"
    and ".." elements.

    It is sometimes necessary to be able to show a path in the native
    representation for the user's platform. The static toNativeSeparators()
    function returns a copy of the specified path in which each directory
    separator is replaced by the appropriate separator for the underlying
    operating system.

    \section1 Examples

    Check if a directory exists:

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

    (We could also use the static convenience function
    QFile::exists().)

    Traversing directories and reading a file:

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

    A program that lists all the files in the current directory
    (excluding symbolic links), sorted by size, smallest first:

    \snippet doc/src/snippets/qdir-listfiles/main.cpp 0

    \sa QFileInfo, QFile, QFileDialog, QApplication::applicationDirPath(), {Find Files Example}
*/

/*!
    Constructs a QDir pointing to the given directory \a path. If path
    is empty the program's working directory, ("."), is used.

    \sa currentPath()
*/

QDir::QDir(const QString &path) : d_ptr(new QDirPrivate(this))
{
    Q_D(QDir);
    d->setPath(path.isEmpty() ? QString::fromLatin1(".") : path);
    d->data->nameFilters = QStringList(QString::fromLatin1("*"));
    d->data->filters = AllEntries;
    d->data->sort = SortFlags(Name | IgnoreCase);
}

/*!
    Constructs a QDir with path \a path, that filters its entries by
    name using \a nameFilter and by attributes using \a filters. It
    also sorts the names using \a sort.

    The default \a nameFilter is an empty string, which excludes
    nothing; the default \a filters is \l AllEntries, which also means
    exclude nothing. The default \a sort is \l Name | \l IgnoreCase,
    i.e. sort by name case-insensitively.

    If \a path is an empty string, QDir uses "." (the current
    directory). If \a nameFilter is an empty string, QDir uses the
    name filter "*" (all files).

    Note that \a path need not exist.

    \sa exists(), setPath(), setNameFilter(), setFilter(), setSorting()
*/

QDir::QDir(const QString &path, const QString &nameFilter,
           SortFlags sort, Filters filters)  : d_ptr(new QDirPrivate(this))
{
    Q_D(QDir);
    d->setPath(path.isEmpty() ? QString::fromLatin1(".") : path);
    d->data->nameFilters = QDir::nameFiltersFromString(nameFilter);
    bool empty = d->data->nameFilters.isEmpty();
    if(!empty) {
        empty = true;
        for(int i = 0; i < d->data->nameFilters.size(); ++i) {
            if(!d->data->nameFilters.at(i).isEmpty()) {
                empty = false;
                break;
            }
        }
    }
    if (empty)
        d->data->nameFilters = QStringList(QString::fromLatin1("*"));
    d->data->sort = sort;
    d->data->filters = filters;
}

/*!
    Constructs a QDir object that is a copy of the QDir object for
    directory \a dir.

    \sa operator=()
*/

QDir::QDir(const QDir &dir)  : d_ptr(new QDirPrivate(this, &dir))
{
}

/*!
    Destroys the QDir object frees up its resources. This has no
    effect on the underlying directory in the file system.
*/

QDir::~QDir()
{
    delete d_ptr;
    d_ptr = 0;
}

/*!
    Sets the path of the directory to \a path. The path is cleaned of
    redundant ".", ".." and of multiple separators. No check is made
    to see whether a directory with this path actually exists; but you
    can check for yourself using exists().

    The path can be either absolute or relative. Absolute paths begin
    with the directory separator "/" (optionally preceded by a drive
    specification under Windows). Relative file names begin with a
    directory name or a file name and specify a path relative to the
    current directory. An example of an absolute path is the string
    "/tmp/quartz", a relative path might look like "src/fatlib".

    \sa path(), absolutePath(), exists(), cleanPath(), dirName(),
      absoluteFilePath(), isRelative(), makeAbsolute()
*/

void QDir::setPath(const QString &path)
{
    Q_D(QDir);
    d->setPath(path);
}

/*!
    Returns the path. This may contain symbolic links, but never
    contains redundant ".", ".." or multiple separators.

    The returned path can be either absolute or relative (see
    setPath()).

    \sa setPath(), absolutePath(), exists(), cleanPath(), dirName(),
    absoluteFilePath(), toNativeSeparators(), makeAbsolute()
*/

QString QDir::path() const
{
    Q_D(const QDir);
    return d->data->path;
}

/*!
    Returns the absolute path (a path that starts with "/" or with a
    drive specification), which may contain symbolic links, but never
    contains redundant ".", ".." or multiple separators.

    \sa setPath(), canonicalPath(), exists(), cleanPath(),
    dirName(), absoluteFilePath()
*/

QString QDir::absolutePath() const
{
    Q_D(const QDir);
    QString ret = d->data->path;
    if (QDir::isRelativePath(ret))
        ret = absoluteFilePath(QString::fromLatin1(""));
    return cleanPath(ret);
}


/*!
    Returns the canonical path, i.e. a path without symbolic links or
    redundant "." or ".." elements.

    On systems that do not have symbolic links this function will
    always return the same string that absolutePath() returns. If the
    canonical path does not exist (normally due to dangling symbolic
    links) canonicalPath() returns an empty string.

    Example:

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

    \sa path(), absolutePath(), exists(), cleanPath(), dirName(),
        absoluteFilePath()
*/

QString QDir::canonicalPath() const
{
    Q_D(const QDir);

    if(!d->data->fileEngine)
        return QLatin1String("");
    return cleanPath(d->data->fileEngine->fileName(QAbstractFileEngine::CanonicalName));
}

/*!
    Returns the name of the directory; this is \e not the same as the
    path, e.g. a directory with the name "mail", might have the path
    "/var/spool/mail". If the directory has no name (e.g. it is the
    root directory) an empty string is returned.

    No check is made to ensure that a directory with this name
    actually exists; but see exists().

    \sa path(), filePath(), absolutePath(), absoluteFilePath()
*/

QString QDir::dirName() const
{
    Q_D(const QDir);
    int pos = d->data->path.lastIndexOf(QLatin1Char('/'));
    if (pos == -1)
        return d->data->path;
    return d->data->path.mid(pos + 1);
}

/*!
    Returns the path name of a file in the directory. Does \e not
    check if the file actually exists in the directory; but see
    exists(). If the QDir is relative the returned path name will also
    be relative. Redundant multiple separators or "." and ".."
    directories in \a fileName are not removed (see cleanPath()).

    \sa dirName() absoluteFilePath(), isRelative(), canonicalPath()
*/

QString QDir::filePath(const QString &fileName) const
{
    Q_D(const QDir);
    if (isAbsolutePath(fileName))
        return QString(fileName);

    QString ret = d->data->path;
    if(!fileName.isEmpty()) {
        if (!ret.isEmpty() && ret[(int)ret.length()-1] != QLatin1Char('/') && fileName[0] != QLatin1Char('/'))
            ret += QLatin1Char('/');
        ret += fileName;
    }
    return ret;
}

/*!
    Returns the absolute path name of a file in the directory. Does \e
    not check if the file actually exists in the directory; but see
    exists(). Redundant multiple separators or "." and ".."
    directories in \a fileName are not removed (see cleanPath()).

    \sa relativeFilePath() filePath() canonicalPath()
*/

QString QDir::absoluteFilePath(const QString &fileName) const
{
    Q_D(const QDir);
    if (isAbsolutePath(fileName))
        return fileName;
    if(!d->data->fileEngine)
        return fileName;

    QString ret;
#ifndef QT_NO_FSFILEENGINE
    if (isRelativePath(d->data->path)) //get pwd
        ret = QFSFileEngine::currentPath(fileName);
#endif
    if(!d->data->path.isEmpty() && d->data->path != QLatin1String(".")) {
        if (!ret.isEmpty() && !ret.endsWith(QLatin1Char('/')))
            ret += QLatin1Char('/');
        ret += d->data->path;
    }
    if (!fileName.isEmpty()) {
        if (!ret.isEmpty() && !ret.endsWith(QLatin1Char('/')))
            ret += QLatin1Char('/');
        ret += fileName;
    }
    return ret;
}

/*!
    Returns the path to \a fileName relative to the directory.

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

    \sa absoluteFilePath() filePath() canonicalPath()
*/

QString QDir::relativeFilePath(const QString &fileName) const
{
    QString dir = absolutePath();
    QString file = cleanPath(fileName);

    if (isRelativePath(file) || isRelativePath(dir))
        return file;

    QString dirDrive = driveSpec(dir);
    QString fileDrive = driveSpec(file);

    bool fileDriveMissing = false;
    if (fileDrive.isEmpty()) {
        fileDrive = dirDrive;
        fileDriveMissing = true;
    }

#ifdef Q_OS_WIN
    if (fileDrive.toLower() != dirDrive.toLower()
        || (file.startsWith(QLatin1String("//"))
        && !dir.startsWith(QLatin1String("//"))))
#else
    if (fileDrive != dirDrive)
#endif
        return file;

    dir.remove(0, dirDrive.size());
    if (!fileDriveMissing)
        file.remove(0, fileDrive.size());

    QString result;
    QStringList dirElts = dir.split(QLatin1Char('/'), QString::SkipEmptyParts);
    QStringList fileElts = file.split(QLatin1Char('/'), QString::SkipEmptyParts);

    int i = 0;
    while (i < dirElts.size() && i < fileElts.size() &&
#ifdef Q_OS_WIN
           dirElts.at(i).toLower() == fileElts.at(i).toLower())
#else
           dirElts.at(i) == fileElts.at(i))
#endif
        ++i;

    for (int j = 0; j < dirElts.size() - i; ++j)
        result += QLatin1String("../");

    for (int j = i; j < fileElts.size(); ++j) {
        result += fileElts.at(j);
        if (j < fileElts.size() - 1)
            result += QLatin1Char('/');
    }

    return result;
}

/*!
    \obsolete

    Use QDir::toNativeSeparators() instead.
*/
QString QDir::convertSeparators(const QString &pathName)
{
    return toNativeSeparators(pathName);
}

/*!
    \since 4.2

    Returns \a pathName with the '/' separators converted to
    separators that are appropriate for the underlying operating
    system.

    On Windows, toNativeSeparators("c:/winnt/system32") returns
    "c:\\winnt\\system32".

    The returned string may be the same as the argument on some
    operating systems, for example on Unix.

    \sa fromNativeSeparators(), separator()
*/
QString QDir::toNativeSeparators(const QString &pathName)
{
    QString n(pathName);
#if defined(Q_FS_FAT) || defined(Q_OS_OS2EMX)
    for (int i=0; i<(int)n.length(); i++) {
        if (n[i] == QLatin1Char('/'))
            n[i] = QLatin1Char('\\');
    }
#endif
    return n;
}

/*!
    \since 4.2

    Returns \a pathName using '/' as file separator. On Windows,
    for instance, fromNativeSeparators("\c{c:\\winnt\\system32}") returns
    "c:/winnt/system32".

    The returned string may be the same as the argument on some
    operating systems, for example on Unix.

    \sa toNativeSeparators(), separator()
*/
QString QDir::fromNativeSeparators(const QString &pathName)
{
    QString n(pathName);
#if defined(Q_FS_FAT) || defined(Q_OS_OS2EMX)
    for (int i=0; i<(int)n.length(); i++) {
        if (n[i] == QLatin1Char('\\'))
            n[i] = QLatin1Char('/');
    }
#endif
    return n;
}

/*!
    Changes the QDir's directory to \a dirName.

    Returns true if the new directory exists and is readable;
    otherwise returns false. Note that the logical cd() operation is
    not performed if the new directory does not exist.

    Calling cd("..") is equivalent to calling cdUp().

    \sa cdUp(), isReadable(), exists(), path()
*/

bool QDir::cd(const QString &dirName)
{
    Q_D(QDir);

    if (dirName.isEmpty() || dirName == QLatin1String("."))
        return true;
    QString newPath = d->data->path;
    if (isAbsolutePath(dirName)) {
        newPath = cleanPath(dirName);
    } else {
        if (isRoot()) {
            if (dirName == QLatin1String(".."))
                return false;
        } else {
            newPath += QLatin1Char('/');
        }

        newPath += dirName;
        if (dirName.indexOf(QLatin1Char('/')) >= 0
            || d->data->path == QLatin1String(".")
            || dirName == QLatin1String("..")) {
            newPath = cleanPath(newPath);
            /*
              If newPath starts with .., we convert it to absolute to
              avoid infinite looping on

                  QDir dir(".");
                  while (dir.cdUp())
                      ;
            */
            if (newPath.startsWith(QLatin1String(".."))) {
                newPath = QFileInfo(newPath).absoluteFilePath();
            }
        }
    }
    {
        QFileInfo fi(newPath);
        if (!(fi.exists() && fi.isDir()))
            return false;
    }

    d->setPath(newPath);
    refresh();
    return true;
}

/*!
    Changes directory by moving one directory up from the QDir's
    current directory.

    Returns true if the new directory exists and is readable;
    otherwise returns false. Note that the logical cdUp() operation is
    not performed if the new directory does not exist.

    \sa cd(), isReadable(), exists(), path()
*/

bool QDir::cdUp()
{
    return cd(QString::fromLatin1(".."));
}

/*!
    Returns the string list set by setNameFilters()
*/

QStringList QDir::nameFilters() const
{
    Q_D(const QDir);

    return d->data->nameFilters;
}

/*!
    Sets the name filters used by entryList() and entryInfoList() to the
    list of filters specified by \a nameFilters.

    Each name filter is a wildcard (globbing) filter that understands
    \c{*} and \c{?} wildcards. (See \l{QRegExp wildcard matching}.)

    For example, the following code sets three name filters on a QDir
    to ensure that only files with extensions typically used for C++
    source files are listed:

    \snippet doc/src/snippets/qdir-namefilters/main.cpp 0

    \sa nameFilters(), setFilter()
*/

void QDir::setNameFilters(const QStringList &nameFilters)
{
    Q_D(QDir);
    d->detach();
    d->data->nameFilters = nameFilters;
}

/*!
    \obsolete
    Adds \a path to the search paths searched in to find resources
    that are not specified with an absolute path. The default search
    path is to search only in the root (\c{:/}).

    Use QDir::addSearchPath() with a prefix instead.

    \sa {The Qt Resource System}, QResource::addSearchPath()
*/

void QDir::addResourceSearchPath(const QString &path)
{
#ifdef QT_BUILD_CORE_LIB
    QResource::addSearchPath(path);
#else
    Q_UNUSED(path)
#endif
}

#ifdef QT_BUILD_CORE_LIB
/*!
    \since 4.3

    Sets or replaces Qt's search paths for file names with the prefix \a prefix
    to \a searchPaths.

    To specify a prefix for a file name, prepend the prefix followed by a single
    colon (e.g., "images:undo.png", "xmldocs:books.xml"). \a prefix can only
    contain letters or numbers (e.g., it cannot contain a colon, nor a slash).

    Qt uses this search path to locate files with a known prefix. The search
    path entries are tested in order, starting with the first entry.

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

    File name prefix must be at least 2 characters long to avoid conflicts with
    Windows drive letters.

    Search paths may contain paths to \l{The Qt Resource System}.
*/
void QDir::setSearchPaths(const QString &prefix, const QStringList &searchPaths)
{
    if (prefix.length() < 2) {
        qWarning("QDir::setSearchPaths: Prefix must be longer than 1 character");
        return;
    }

    for (int i = 0; i < prefix.count(); i++) {
        if (!prefix.at(i).isLetterOrNumber()) {
            qWarning("QDir::setSearchPaths: Prefix can only contain letters or numbers");
            return;
        }
    }

    QWriteLocker lock(&QCoreGlobalData::instance()->dirSearchPathsLock);
    QMap<QString, QStringList> &paths = QCoreGlobalData::instance()->dirSearchPaths;
    if (searchPaths.isEmpty()) {
        paths.remove(prefix);
    } else {
        paths.insert(prefix, searchPaths);
    }
}

/*!
    \since 4.3

    Adds \a path to the search path for \a prefix.

    \sa setSearchPaths()
*/
void QDir::addSearchPath(const QString &prefix, const QString &path)
{
    if (path.isEmpty())
        return;

    QWriteLocker lock(&QCoreGlobalData::instance()->dirSearchPathsLock);
    QCoreGlobalData::instance()->dirSearchPaths[prefix] += path;
}

/*!
    \since 4.3

    Returns the search paths for \a prefix.

    \sa setSearchPaths(), addSearchPath()
*/
QStringList QDir::searchPaths(const QString &prefix)
{
    QReadLocker lock(&QCoreGlobalData::instance()->dirSearchPathsLock);
    return QCoreGlobalData::instance()->dirSearchPaths.value(prefix);
}

#endif // QT_BUILD_CORE_LIB

/*!
    Returns the value set by setFilter()
*/

QDir::Filters QDir::filter() const
{
    Q_D(const QDir);

    return d->data->filters;
}

/*!
    \enum QDir::Filter

    This enum describes the filtering options available to QDir; e.g.
    for entryList() and entryInfoList(). The filter value is specified
    by combining values from the following list using the bitwise OR
    operator:

    \value Dirs    List directories that match the filters.
    \value AllDirs  List all directories; i.e. don't apply the filters
                    to directory names.
    \value Files   List files.
    \value Drives  List disk drives (ignored under Unix).
    \value NoSymLinks  Do not list symbolic links (ignored by operating
                       systems that don't support symbolic links).
    \value NoDotAndDotDot Do not list the special entries "." and "..".
    \value AllEntries  List directories, files, drives and symlinks (this does not list
                broken symlinks unless you specify System).
    \value Readable    List files for which the application has read
                       access. The Readable value needs to be combined
                       with Dirs or Files.
    \value Writable    List files for which the application has write
                       access. The Writable value needs to be combined
                       with Dirs or Files.
    \value Executable  List files for which the application has
                       execute access. The Executable value needs to be
                       combined with Dirs or Files.
    \value Modified  Only list files that have been modified (ignored
                     under Unix).
    \value Hidden  List hidden files (on Unix, files starting with a .).
    \value System  List system files (on Unix, FIFOs, sockets and
                   device files)
    \value CaseSensitive  The filter should be case sensitive.

    \omitvalue DefaultFilter
    \omitvalue TypeMask
    \omitvalue All
    \omitvalue RWEMask
    \omitvalue AccessMask
    \omitvalue PermissionMask
    \omitvalue NoFilter

    Functions that use Filter enum values to filter lists of files
    and directories will include symbolic links to files and directories
    unless you set the NoSymLinks value.

    A default constructed QDir will not filter out files based on
    their permissions, so entryList() and entryInfoList() will return
    all files that are readable, writable, executable, or any
    combination of the three.  This makes the default easy to write,
    and at the same time useful.

    For example, setting the \c Readable, \c Writable, and \c Files
    flags allows all files to be listed for which the application has read
    access, write access or both. If the \c Dirs and \c Drives flags are
    also included in this combination then all drives, directories, all
    files that the application can read, write, or execute, and symlinks
    to such files/directories can be listed.

    To retrieve the permissons for a directory, use the
    entryInfoList() function to get the associated QFileInfo objects
    and then use the QFileInfo::permissons() to obtain the permissions
    and ownership for each file.
*/

/*!
    Sets the filter used by entryList() and entryInfoList() to \a
    filters. The filter is used to specify the kind of files that
    should be returned by entryList() and entryInfoList(). See
    \l{QDir::Filter}.

    \sa filter(), setNameFilters()
*/

void QDir::setFilter(Filters filters)
{
    Q_D(QDir);

    d->detach();
    d->data->filters = filters;
}

/*!
    Returns the value set by setSorting()

    \sa setSorting() SortFlag
*/

QDir::SortFlags QDir::sorting() const
{
    Q_D(const QDir);

    return d->data->sort;
}

/*!
    \enum QDir::SortFlag

    This enum describes the sort options available to QDir, e.g. for
    entryList() and entryInfoList(). The sort value is specified by
    OR-ing together values from the following list:

    \value Name  Sort by name.
    \value Time  Sort by time (modification time).
    \value Size  Sort by file size.
    \value Type  Sort by file type (extension).
    \value Unsorted  Do not sort.
    \value NoSort Not sorted by default.

    \value DirsFirst  Put the directories first, then the files.
    \value DirsLast Put the files first, then the directories.
    \value Reversed  Reverse the sort order.
    \value IgnoreCase  Sort case-insensitively.
    \value LocaleAware Sort items appropriately using the current locale settings.

    \omitvalue SortByMask
    \omitvalue DefaultSort

    You can only specify one of the first four.

    If you specify both DirsFirst and Reversed, directories are
    still put first, but in reverse order; the files will be listed
    after the directories, again in reverse order.
*/

/*!
    Sets the sort order used by entryList() and entryInfoList().

    The \a sort is specified by OR-ing values from the enum
    \l{QDir::SortFlag}.

    \sa sorting() SortFlag
*/

void QDir::setSorting(SortFlags sort)
{
    Q_D(QDir);

    d->detach();
    d->data->sort = sort;
}


/*!
    Returns the total number of directories and files in the directory.

    Equivalent to entryList().count().

    \sa operator[](), entryList()
*/

uint QDir::count() const
{
    Q_D(const QDir);

    d->updateFileLists();
    return d->data->files.count();
}

/*!
    Returns the file name at position \a pos in the list of file
    names. Equivalent to entryList().at(index).

    Returns an empty string if \a pos is out of range or if the
    entryList() function failed.

    \sa count(), entryList()
*/

QString QDir::operator[](int pos) const
{
    Q_D(const QDir);

    d->updateFileLists();
    return d->data->files[pos];
}

/*!
    \overload

    Returns a list of the names of all the files and directories in
    the directory, ordered according to the name and attribute filters
    previously set with setNameFilters() and setFilter(), and sorted according
    to the flags set with setSorting().

    The attribute filter and sorting specifications can be overridden using the
    \a filters and \a sort arguments.

    Returns an empty list if the directory is unreadable, does not
    exist, or if nothing matches the specification.

    \note To list symlinks that point to non existing files, \l System must be
     passed to the filter.

    \sa entryInfoList(), setNameFilters(), setSorting(), setFilter()
*/

QStringList QDir::entryList(Filters filters, SortFlags sort) const
{
    Q_D(const QDir);

    return entryList(d->data->nameFilters, filters, sort);
}


/*!
    \overload

    Returns a list of QFileInfo objects for all the files and directories in
    the directory, ordered according to the name and attribute filters
    previously set with setNameFilters() and setFilter(), and sorted according
    to the flags set with setSorting().

    The attribute filter and sorting specifications can be overridden using the
    \a filters and \a sort arguments.

    Returns an empty list if the directory is unreadable, does not
    exist, or if nothing matches the specification.

    \sa entryList(), setNameFilters(), setSorting(), setFilter(), isReadable(), exists()
*/

QFileInfoList QDir::entryInfoList(Filters filters, SortFlags sort) const
{
    Q_D(const QDir);

    return entryInfoList(d->data->nameFilters, filters, sort);
}

/*!
    Returns a list of the names of all the files and
    directories in the directory, ordered according to the name
    and attribute filters previously set with setNameFilters()
    and setFilter(), and sorted according to the flags set with
    setSorting().

    The name filter, file attribute filter, and sorting specification
    can be overridden using the \a nameFilters, \a filters, and \a sort
    arguments.

    Returns an empty list if the directory is unreadable, does not
    exist, or if nothing matches the specification.

    \sa entryInfoList(), setNameFilters(), setSorting(), setFilter()
*/

QStringList QDir::entryList(const QStringList &nameFilters, Filters filters,
                            SortFlags sort) const
{
    Q_D(const QDir);

    if (filters == NoFilter)
        filters = d->data->filters;
#ifdef QT3_SUPPORT
    if (d->matchAllDirs)
        filters |= AllDirs;
#endif
    if (sort == NoSort)
        sort = d->data->sort;
    if (filters == NoFilter && sort == NoSort && nameFilters == d->data->nameFilters) {
        d->updateFileLists();
        return d->data->files;
    }
    QStringList l = d->data->fileEngine->entryList(filters, nameFilters);
    if ((sort & QDir::SortByMask) == QDir::Unsorted)
        return l;

    QStringList ret;
    d->sortFileList(sort, l, &ret, 0);
    return ret;
}

/*!
    Returns a list of QFileInfo objects for all the files and
    directories in the directory, ordered according to the name
    and attribute filters previously set with setNameFilters()
    and setFilter(), and sorted according to the flags set with
    setSorting().

    The name filter, file attribute filter, and sorting specification
    can be overridden using the \a nameFilters, \a filters, and \a sort
    arguments.

    Returns an empty list if the directory is unreadable, does not
    exist, or if nothing matches the specification.

    \sa entryList(), setNameFilters(), setSorting(), setFilter(), isReadable(), exists()
*/

QFileInfoList QDir::entryInfoList(const QStringList &nameFilters, Filters filters,
                                  SortFlags sort) const
{
    Q_D(const QDir);

    if (filters == NoFilter)
        filters = d->data->filters;
#ifdef QT3_SUPPORT
    if (d->matchAllDirs)
        filters |= AllDirs;
#endif
    if (sort == NoSort)
        sort = d->data->sort;
    if (filters == NoFilter && sort == NoSort && nameFilters == d->data->nameFilters) {
        d->updateFileLists();
        return d->data->fileInfos;
    }
    QFileInfoList ret;
    QStringList l = d->data->fileEngine->entryList(filters, nameFilters);
    d->sortFileList(sort, l, 0, &ret);
    return ret;
}

/*!
    Creates a sub-directory called \a dirName.

    Returns true on success; otherwise returns false.

    \sa rmdir()
*/

bool QDir::mkdir(const QString &dirName) const
{
    Q_D(const QDir);

    if (dirName.isEmpty()) {
        qWarning("QDir::mkdir: Empty or null file name(s)");
        return false;
    }
    if(!d->data->fileEngine)
        return false;

    QString fn = filePath(dirName);
    return d->data->fileEngine->mkdir(fn, false);
}

/*!
    Removes the directory specified by \a dirName.

    The directory must be empty for rmdir() to succeed.

    Returns true if successful; otherwise returns false.

    \sa mkdir()
*/

bool QDir::rmdir(const QString &dirName) const
{
    Q_D(const QDir);

    if (dirName.isEmpty()) {
        qWarning("QDir::rmdir: Empty or null file name(s)");
        return false;
    }
    if(!d->data->fileEngine)
        return false;

    QString fn = filePath(dirName);
    return d->data->fileEngine->rmdir(fn, false);
}

/*!
    Creates the directory path \a dirPath.

    The function will create all parent directories necessary to
    create the directory.

    Returns true if successful; otherwise returns false.

    \sa rmpath()
*/

bool QDir::mkpath(const QString &dirPath) const
{
    Q_D(const QDir);

    if (dirPath.isEmpty()) {
        qWarning("QDir::mkpath: Empty or null file name(s)");
        return false;
    }
    if(!d->data->fileEngine)
        return false;

    QString fn = filePath(dirPath);
    return d->data->fileEngine->mkdir(fn, true);
}

/*!
    Removes the directory path \a dirPath.

    The function will remove all parent directories in \a dirPath,
    provided that they are empty. This is the opposite of
    mkpath(dirPath).

    Returns true if successful; otherwise returns false.

    \sa mkpath()
*/
bool QDir::rmpath(const QString &dirPath) const
{
    Q_D(const QDir);

    if (dirPath.isEmpty()) {
        qWarning("QDir::rmpath: Empty or null file name(s)");
        return false;
    }
    if(!d->data->fileEngine)
        return false;

    QString fn = filePath(dirPath);
    return d->data->fileEngine->rmdir(fn, true);
}

/*!
    Returns true if the directory is readable \e and we can open files
    by name; otherwise returns false.

    \warning A false value from this function is not a guarantee that
    files in the directory are not accessible.

    \sa QFileInfo::isReadable()
*/


bool QDir::isReadable() const
{
    Q_D(const QDir);

    if(!d->data->fileEngine)
        return false;
    const QAbstractFileEngine::FileFlags info = d->data->fileEngine->fileFlags(QAbstractFileEngine::DirectoryType
                                                                       |QAbstractFileEngine::PermsMask);
    if(!(info & QAbstractFileEngine::DirectoryType))
        return false;
    return info & QAbstractFileEngine::ReadUserPerm;
}

/*!
    \overload

    Returns true if the \e directory exists; otherwise returns false.
    (If a file with the same name is found this function will return
    false).

    \sa QFileInfo::exists(), QFile::exists()
*/

bool QDir::exists() const
{
    Q_D(const QDir);

    if(!d->data->fileEngine)
        return false;
    const QAbstractFileEngine::FileFlags info =
        d->data->fileEngine->fileFlags(
            QAbstractFileEngine::DirectoryType
            | QAbstractFileEngine::ExistsFlag
            | QAbstractFileEngine::Refresh);
    if(!(info & QAbstractFileEngine::DirectoryType))
        return false;
    return info & QAbstractFileEngine::ExistsFlag;
}

/*!
    Returns true if the directory is the root directory; otherwise
    returns false.

    Note: If the directory is a symbolic link to the root directory
    this function returns false. If you want to test for this use
    canonicalPath(), e.g.

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

    \sa root(), rootPath()
*/

bool QDir::isRoot() const
{
    Q_D(const QDir);

    if(!d->data->fileEngine)
        return true;
    return d->data->fileEngine->fileFlags(QAbstractFileEngine::FlagsMask) & QAbstractFileEngine::RootFlag;
}

/*!
    \fn bool QDir::isAbsolute() const

    Returns true if the directory's path is absolute; otherwise
    returns false. See isAbsolutePath().

    \sa isRelative() makeAbsolute() cleanPath()
*/

/*!
   \fn bool QDir::isAbsolutePath(const QString &)

    Returns true if \a path is absolute; returns false if it is
    relative.

    \sa isAbsolute() isRelativePath() makeAbsolute() cleanPath()
*/

/*!
    Returns true if the directory path is relative; otherwise returns
    false. (Under Unix a path is relative if it does not start with a
    "/").

    \sa makeAbsolute() isAbsolute() isAbsolutePath() cleanPath()
*/

bool QDir::isRelative() const
{
    Q_D(const QDir);

    if(!d->data->fileEngine)
        return false;
    return d->data->fileEngine->isRelativePath();
}


/*!
    Converts the directory path to an absolute path. If it is already
    absolute nothing happens. Returns true if the conversion
    succeeded; otherwise returns false.

    \sa isAbsolute() isAbsolutePath() isRelative() cleanPath()
*/

bool QDir::makeAbsolute() // ### What do the return values signify?
{
    Q_D(QDir);

    if(!d->data->fileEngine)
        return false;
    QString absolutePath = d->data->fileEngine->fileName(QAbstractFileEngine::AbsoluteName);
    if(QDir::isRelativePath(absolutePath))
        return false;
    d->detach();
    d->data->path = absolutePath;
    d->data->fileEngine->setFileName(absolutePath);
    if(!(d->data->fileEngine->fileFlags(QAbstractFileEngine::TypesMask) & QAbstractFileEngine::DirectoryType))
        return false;
    return true;
}

/*!
    Returns true if directory \a dir and this directory have the same
    path and their sort and filter settings are the same; otherwise
    returns false.

    Example:

    \snippet doc/src/snippets/code/src_corelib_io_qdir.cpp 10
*/

bool QDir::operator==(const QDir &dir) const
{
    const QDirPrivate *d = d_func();
    const QDirPrivate *other = dir.d_func();

    if(d->data == other->data)
        return true;
    Q_ASSERT(d->data->fileEngine && other->data->fileEngine);
    if(d->data->fileEngine->caseSensitive() != other->data->fileEngine->caseSensitive())
        return false;
    if(d->data->filters == other->data->filters
       && d->data->sort == other->data->sort
       && d->data->nameFilters == other->data->nameFilters) {
        QString dir1 = absolutePath(), dir2 = dir.absolutePath();
        if(!other->data->fileEngine->caseSensitive())
            return (dir1.toLower() == dir2.toLower());

        return (dir1 == dir2);

    }
    return false;
}

/*!
    Makes a copy of the \a dir object and assigns it to this QDir
    object.
*/

QDir &QDir::operator=(const QDir &dir)
{
    if (this == &dir)
        return *this;

    Q_D(QDir);
    qAtomicAssign(d->data, dir.d_func()->data);
    return *this;
}

/*!
    \overload
    \obsolete

    Sets the directory path to the given \a path.

    Use setPath() instead.
*/

QDir &QDir::operator=(const QString &path)
{
    Q_D(QDir);

    d->setPath(path);
    return *this;
}

/*!
    \fn bool QDir::operator!=(const QDir &dir) const

    Returns true if directory \a dir and this directory have different
    paths or different sort or filter settings; otherwise returns
    false.

    Example:

    \snippet doc/src/snippets/code/src_corelib_io_qdir.cpp 11
*/


/*!
    Removes the file, \a fileName.

    Returns true if the file is removed successfully; otherwise
    returns false.
*/

bool QDir::remove(const QString &fileName)
{
    if (fileName.isEmpty()) {
        qWarning("QDir::remove: Empty or null file name");
        return false;
    }
    QString p = filePath(fileName);
    return QFile::remove(p);
}

/*!
    Renames a file or directory from \a oldName to \a newName, and returns
    true if successful; otherwise returns false.

    On most file systems, rename() fails only if \a oldName does not
    exist, if \a newName and \a oldName are not on the same
    partition or if a file with the new name already exists.
    However, there are also other reasons why rename() can
    fail. For example, on at least one file system rename() fails if
    \a newName points to an open file.
*/

bool QDir::rename(const QString &oldName, const QString &newName)
{
    Q_D(QDir);

    if (oldName.isEmpty() || newName.isEmpty()) {
        qWarning("QDir::rename: Empty or null file name(s)");
        return false;
    }
    if(!d->data->fileEngine)
        return false;

    QFile file(filePath(oldName));
    if(!file.exists())
        return false;
    return file.rename(filePath(newName));
}

/*!
    Returns true if the file called \a name exists; otherwise returns
    false. Unless \a name contains an absolute file path, the file
    name is assumed to be relative to the current directory.

    \sa QFileInfo::exists(), QFile::exists()
*/

bool QDir::exists(const QString &name) const
{
    if (name.isEmpty()) {
        qWarning("QDir::exists: Empty or null file name");
        return false;
    }
    QString tmp = filePath(name);
    return QFile::exists(tmp);
}

/*!
    Returns a list of the root directories on this system.

    On Windows this returns a list of QFileInfo objects containing "C:/",
    "D:/", etc. On other operating systems, it returns a list containing
    just one root directory (i.e. "/").

    \sa root(), rootPath()
*/

QFileInfoList QDir::drives()
{
#ifdef QT_NO_FSFILEENGINE
    return QFileInfoList();
#else
    return QFSFileEngine::drives();
#endif
}

/*!
    Returns the native directory separator: "/" under Unix (including
    Mac OS X) and "\\" under Windows.

    You do not need to use this function to build file paths. If you
    always use "/", Qt will translate your paths to conform to the
    underlying operating system. If you want to display paths to the
    user using their operating system's separator use
    toNativeSeparators().
*/

QChar QDir::separator()
{
#if defined(Q_OS_UNIX)
    return QLatin1Char('/');
#elif defined (Q_FS_FAT) || defined(Q_WS_WIN)
    return QLatin1Char('\\');
#elif defined (Q_OS_MAC)
    return QLatin1Char(':');
#else
    return QLatin1Char('/');
#endif
}

/*!
    Sets the application's current working directory to \a path.
    Returns true if the directory was successfully changed; otherwise
    returns false.

    \sa current() currentPath() home() root() temp()
*/

bool QDir::setCurrent(const QString &path)
{
#ifdef QT_NO_FSFILEENGINE
    Q_UNUSED(path);
    return false;
#else
    return QFSFileEngine::setCurrentPath(path);
#endif
}

/*!
    \fn QDir QDir::current()

    Returns the application's current directory.

    The directory is constructed using the absolute path of the current directory,
    ensuring that its path() will be the same as its absolutePath().

    \sa currentPath(), home(), root(), temp()
*/

/*!
    Returns the absolute path of the application's current directory.

    \sa current(), homePath(), rootPath(), tempPath()
*/
QString QDir::currentPath()
{
#ifdef QT_NO_FSFILEENGINE
    return QString();
#else
    return QFSFileEngine::currentPath();
#endif
}

/*!
  \fn QString QDir::currentDirPath()
    Returns the absolute path of the application's current directory.

    Use currentPath() instead.

    \sa currentPath()
*/

/*!
    \fn QDir QDir::home()

    Returns the user's home directory.

    The directory is constructed using the absolute path of the home directory,
    ensuring that its path() will be the same as its absolutePath().

    See homePath() for details.

    \sa drives(), current(), root(), temp()
*/

/*!
    Returns the absolute path of the user's home directory.

    Under Windows this function will return the directory of the
    current user's profile. Typically, this is:

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

    Use the toNativeSeparators() function to convert the separators to
    the ones that are appropriate for the underlying operating system.

    If the directory of the current user's profile does not exist or
    cannot be retrieved, the following alternatives will be checked (in
    the given order) until an existing and available path is found:

    \list 1
    \o The path specified by the \c USERPROFILE environment variable.
    \o The path formed by concatenating the \c HOMEDRIVE and \c HOMEPATH
    environment variables.
    \o The path specified by the \c HOME environment variable.
    \o The path returned by the rootPath() function (which uses the \c SystemDrive
    environment variable)
    \o  The \c{C:/} directory.
    \endlist

    Under non-Windows operating systems the \c HOME environment
    variable is used if it exists, otherwise the path returned by the
    rootPath() function is used.

    \sa home(), currentPath(), rootPath(), tempPath()
*/
QString QDir::homePath()
{
#ifdef QT_NO_FSFILEENGINE
    return QString();
#else
    return cleanPath(QFSFileEngine::homePath());
#endif
}

/*!
  \fn QString QDir::homeDirPath()

  Returns the absolute path of the user's home directory.

  Use homePath() instead.

  \sa homePath()
 */

/*!
    \fn QDir QDir::temp()

    Returns the system's temporary directory.

    The directory is constructed using the absolute path of the temporary directory,
    ensuring that its path() will be the same as its absolutePath().

    See tempPath() for details.

    \sa drives(), current(), home(), root()
*/

/*!
    Returns the absolute path of the system's temporary directory.

    On Unix/Linux systems this is usually \c{/tmp}; on Windows this is
    usually the path in the \c TEMP or \c TMP environment
    variable. Whether a directory separator is added to the end or
    not, depends on the operating system.

    \sa temp(), currentPath(), homePath(), rootPath()
*/
QString QDir::tempPath()
{
#ifdef QT_NO_FSFILEENGINE
    return QString();
#else
    return cleanPath(QFSFileEngine::tempPath());
#endif
}

/*!
    \fn QDir QDir::root()

    Returns the root directory.

    The directory is constructed using the absolute path of the root directory,
    ensuring that its path() will be the same as its absolutePath().

    See rootPath() for details.

    \sa drives(), current(), home(), temp()
*/

/*!
    Returns the absolute path of the root directory.

    For Unix operating systems this returns "/". For Windows file
    systems this normally returns "c:/".

    \sa root(), drives(), currentPath(), homePath(), tempPath()
*/
QString QDir::rootPath()
{
#ifdef QT_NO_FSFILEENGINE
    return QString();
#else
    return QFSFileEngine::rootPath();
#endif
}

/*!
  \fn QString QDir::rootDirPath()

  Returns the absolute path of the root directory.

  Use rootPath() instead.

  \sa rootPath()
*/

#ifndef QT_NO_REGEXP
/*!
    \overload

    Returns true if the \a fileName matches any of the wildcard (glob)
    patterns in the list of \a filters; otherwise returns false. The
    matching is case insensitive.

    \sa {QRegExp wildcard matching}, QRegExp::exactMatch() entryList() entryInfoList()
*/


bool QDir::match(const QStringList &filters, const QString &fileName)
{
    for(QStringList::ConstIterator sit = filters.begin(); sit != filters.end(); ++sit) {
        QRegExp rx(*sit, Qt::CaseInsensitive, QRegExp::Wildcard);
        if (rx.exactMatch(fileName))
            return true;
    }
    return false;
}

/*!
    Returns true if the \a fileName matches the wildcard (glob)
    pattern \a filter; otherwise returns false. The \a filter may
    contain multiple patterns separated by spaces or semicolons.
    The matching is case insensitive.

    \sa {QRegExp wildcard matching}, QRegExp::exactMatch() entryList() entryInfoList()
*/

bool QDir::match(const QString &filter, const QString &fileName)
{
    return match(nameFiltersFromString(filter), fileName);
}
#endif

/*!
    Removes all multiple directory separators "/" and resolves any
    "."s or ".."s found in the path, \a path.

    Symbolic links are kept. This function does not return the
    canonical path, but rather the simplest version of the input.
    For example, "./local" becomes "local", "local/../bin" becomes
    "bin" and "/local/usr/../bin" becomes "/local/bin".

    \sa absolutePath() canonicalPath()
*/

QString QDir::cleanPath(const QString &path)
{
    if (path.isEmpty())
        return path;
    QString name = path;
    QChar dir_separator = separator();
    if(dir_separator != QLatin1Char('/'))
	name.replace(dir_separator, QLatin1Char('/'));

    int used = 0, levels = 0;
    const int len = name.length();
    QVector<QChar> out(len);
    const QChar *p = name.unicode();
    for(int i = 0, last = -1, iwrite = 0; i < len; i++) {
        if(p[i] == QLatin1Char('/')) {
            while(i < len-1 && p[i+1] == QLatin1Char('/')) {
#if defined(Q_OS_WIN) && !defined(Q_OS_WINCE) //allow unc paths
                if(!i)
                    break;
#endif
                i++;
            }
            bool eaten = false;
            if(i < len - 1 && p[i+1] == QLatin1Char('.')) {
                int dotcount = 1;
                if(i < len - 2 && p[i+2] == QLatin1Char('.'))
                    dotcount++;
                if(i == len - dotcount - 1) {
                    if(dotcount == 1) {
                        break;
                    } else if(levels) {
                        if(last == -1) {
                            for(int i2 = iwrite-1; i2 >= 0; i2--) {
                                if(out[i2] == QLatin1Char('/')) {
                                    last = i2;
                                    break;
                                }
                            }
                        }
                        used -= iwrite - last - 1;
                        break;
                    }
                } else if(p[i+dotcount+1] == QLatin1Char('/')) {
                    if(dotcount == 2 && levels) {
                        if(last == -1 || iwrite - last == 1) {
                            for(int i2 = (last == -1) ? (iwrite-1) : (last-1); i2 >= 0; i2--) {
                                if(out[i2] == QLatin1Char('/')) {
                                    eaten = true;
                                    last = i2;
                                    break;
                                }
                            }
                        } else {
                            eaten = true;
                        }
                        if(eaten) {
                            levels--;
                            used -= iwrite - last;
                            iwrite = last;
                            last = -1;
                        }
                    } else if (dotcount == 2 && i > 0 && p[i - 1] != QLatin1Char('.')) {
                        eaten = true;
                        used -= iwrite - qMax(0, last);
                        iwrite = qMax(0, last);
                        last = -1;
                        ++i;
                    } else if(dotcount == 1) {
                        eaten = true;
                    }
                    if(eaten)
                        i += dotcount;
                } else {
                    levels++;
                }
            } else if(last != -1 && iwrite - last == 1) {
#ifdef Q_OS_WIN
                eaten = (iwrite > 2);
#else
                eaten = true;
#endif
                last = -1;
            } else if(last != -1 && i == len-1) {
                eaten = true;
            } else {
                levels++;
            }
            if(!eaten)
                last = i - (i - iwrite);
            else
                continue;
        } else if(!i && p[i] == QLatin1Char('.')) {
            int dotcount = 1;
            if(len >= 1 && p[1] == QLatin1Char('.'))
                dotcount++;
            if(len >= dotcount && p[dotcount] == QLatin1Char('/')) {
                if(dotcount == 1) {
                    i++;
                    while(i+1 < len-1 && p[i+1] == QLatin1Char('/'))
                        i++;
                    continue;
                }
            }
        }
        out[iwrite++] = p[i];
        used++;
    }
    QString ret;
    if(used == len)
        ret = name;
    else
	ret = QString(out.data(), used);

    // Strip away last slash except for root directories
    if (ret.endsWith(QLatin1Char('/'))
        && !(ret.size() == 1 || (ret.size() == 3 && ret.at(1) == QLatin1Char(':'))))
        ret = ret.left(ret.length() - 1);

    return ret;
}

/*!
    Returns true if \a path is relative; returns false if it is
    absolute.

    \sa isRelative() isAbsolutePath() makeAbsolute()
*/

bool QDir::isRelativePath(const QString &path)
{
    return QFileInfo(path).isRelative();
}

/*!
    Refreshes the directory information.
*/

void QDir::refresh() const
{
    Q_D(const QDir);

    d->data->clear();
}

/*!
    \internal

    Returns a list of name filters from the given \a nameFilter. (If
    there is more than one filter, each pair of filters is separated
    by a space or by a semicolon.)
*/

QStringList QDir::nameFiltersFromString(const QString &nameFilter)
{
    return QDirPrivate::splitFilters(nameFilter);
}

/*!
    \macro void Q_INIT_RESOURCE(name)
    \relates QDir

    Initializes the resources specified by the \c .qrc file with the
    specified base \a name. Normally, Qt resources are loaded
    automatically at startup. The Q_INIT_RESOURCE() macro is
    necessary on some platforms for resources stored in a static
    library.

    For example, if your application's resources are listed in a file
    called \c myapp.qrc, you can ensure that the resources are
    initialized at startup by adding this line to your \c main()
    function:

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

    If the file name contains characters that cannot be part of a valid C++ function name 
    (such as '-'), they have to be replaced by the underscore character ('_').

    Note: This macro cannot be used in a namespace. It should be called from
    main(). If that is not possible, the following workaround can be used
    to init the resource \c myapp from the function \c{MyNamespace::myFunction}:

    \snippet doc/src/snippets/code/src_corelib_io_qdir.cpp 14

    \sa Q_CLEANUP_RESOURCE(), {The Qt Resource System}
*/

/*!
    \since 4.1
    \macro void Q_CLEANUP_RESOURCE(name)
    \relates QDir

    Unloads the resources specified by the \c .qrc file with the base
    name \a name.

    Normally, Qt resources are unloaded automatically when the
    application terminates, but if the resources are located in a
    plugin that is being unloaded, call Q_CLEANUP_RESOURCE() to force
    removal of your resources.

    Note: This macro cannot be used in a namespace. Please see the
    Q_INIT_RESOURCE documentation for a workaround.

    Example:

    \snippet doc/src/snippets/code/src_corelib_io_qdir.cpp 15

    \sa Q_INIT_RESOURCE(), {The Qt Resource System}
*/

#ifdef QT3_SUPPORT

/*!
    \fn bool QDir::matchAllDirs() const

    Use filter() & AllDirs instead.
*/
bool QDir::matchAllDirs() const
{
    Q_D(const QDir);
    return d->matchAllDirs;
}


/*!
    \fn void QDir::setMatchAllDirs(bool on)

    Use setFilter() instead.
*/
void QDir::setMatchAllDirs(bool on)
{
    Q_D(QDir);
    d->matchAllDirs = on;
}

/*!
    Use nameFilters() instead.
*/
QString QDir::nameFilter() const
{
    Q_D(const QDir);

    return nameFilters().join(QString(d->filterSepChar));
}

/*!
    Use setNameFilters() instead.

    The \a nameFilter is a wildcard (globbing) filter that understands
    "*" and "?" wildcards. (See \l{QRegExp wildcard matching}.) You may
    specify several filter entries, each separated by spaces or by
    semicolons.

    For example, if you want entryList() and entryInfoList() to list
    all files ending with either ".cpp" or ".h", you would use either
    dir.setNameFilters("*.cpp *.h") or dir.setNameFilters("*.cpp;*.h").

    \oldcode
        QString filter = "*.cpp *.cxx *.cc";
        dir.setNameFilter(filter);
    \newcode
        QString filter = "*.cpp *.cxx *.cc";
        dir.setNameFilters(filter.split(' '));
    \endcode
*/
void QDir::setNameFilter(const QString &nameFilter)
{
    Q_D(QDir);

    d->filterSepChar = QDirPrivate::getFilterSepChar(nameFilter);
    setNameFilters(QDirPrivate::splitFilters(nameFilter, d->filterSepChar));
}

/*!
    \fn QString QDir::absPath() const

    Use absolutePath() instead.
*/

/*!
    \fn QString QDir::absFilePath(const QString &fileName, bool acceptAbsPath) const

    Use absoluteFilePath(\a fileName) instead.

    The \a acceptAbsPath parameter is ignored.
*/

/*!
    \fn bool QDir::mkdir(const QString &dirName, bool acceptAbsPath) const

    Use mkdir(\a dirName) instead.

    The \a acceptAbsPath parameter is ignored.
*/

/*!
    \fn bool QDir::rmdir(const QString &dirName, bool acceptAbsPath) const

    Use rmdir(\a dirName) instead.

    The \a acceptAbsPath parameter is ignored.
*/

/*!
    \fn QStringList QDir::entryList(const QString &nameFilter, Filters filters,
                                    SortFlags sort) const
    \overload

    Use the overload that takes a name filter string list as first
    argument instead of a combination of attribute filter flags.
*/

/*!
    \fn QFileInfoList QDir::entryInfoList(const QString &nameFilter, Filters filters,
                                          SortFlags sort) const
    \overload

    Use the overload that takes a name filter string list as first
    argument instead of a combination of attribute filter flags.
*/

/*!
    \fn void QDir::convertToAbs()

    Use makeAbsolute() instead.
*/

/*!
    \fn QString QDir::cleanDirPath(const QString &name)

    Use cleanPath() instead.
*/

/*!
    \typedef QDir::FilterSpec

    Use QDir::Filters instead.
*/

/*!
    \typedef QDir::SortSpec

    Use QDir::SortFlags instead.
*/
#endif
#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug debug, QDir::Filters filters)
{
    QStringList flags;
    if (filters == QDir::NoFilter) {
        flags << QLatin1String("NoFilter");
    } else {
        if (filters & QDir::Dirs) flags << QLatin1String("Dirs");
        if (filters & QDir::AllDirs) flags << QLatin1String("AllDirs");
        if (filters & QDir::Files) flags << QLatin1String("Files");
        if (filters & QDir::Drives) flags << QLatin1String("Drives");
        if (filters & QDir::NoSymLinks) flags << QLatin1String("NoSymLinks");
        if (filters & QDir::NoDotAndDotDot) flags << QLatin1String("NoDotAndDotDot");
        if ((filters & QDir::AllEntries) == QDir::AllEntries) flags << QLatin1String("AllEntries");
        if (filters & QDir::Readable) flags << QLatin1String("Readable");
        if (filters & QDir::Writable) flags << QLatin1String("Writable");
        if (filters & QDir::Executable) flags << QLatin1String("Executable");
        if (filters & QDir::Modified) flags << QLatin1String("Modified");
        if (filters & QDir::Hidden) flags << QLatin1String("Hidden");
        if (filters & QDir::System) flags << QLatin1String("System");
        if (filters & QDir::CaseSensitive) flags << QLatin1String("CaseSensitive");
    }
    debug << "QDir::Filters(" << qPrintable(flags.join(QLatin1String("|"))) << ")";
    return debug;
}

QDebug operator<<(QDebug debug, QDir::SortFlags sorting)
{
    if (sorting == QDir::NoSort) {
        debug << "QDir::SortFlags(NoSort)";
    } else {
        QString type;
        if ((sorting & 3) == QDir::Name) type = QLatin1String("Name");
        if ((sorting & 3) == QDir::Time) type = QLatin1String("Time");
        if ((sorting & 3) == QDir::Size) type = QLatin1String("Size");
        if ((sorting & 3) == QDir::Unsorted) type = QLatin1String("Unsorted");

        QStringList flags;
        if (sorting & QDir::DirsFirst) flags << QLatin1String("DirsFirst");
        if (sorting & QDir::DirsLast) flags << QLatin1String("DirsLast");
        if (sorting & QDir::IgnoreCase) flags << QLatin1String("IgnoreCase");
        if (sorting & QDir::LocaleAware) flags << QLatin1String("LocaleAware");
        if (sorting & QDir::Type) flags << QLatin1String("Type");
        debug << "QDir::SortFlags(" << qPrintable(type)
              << "|"
              << qPrintable(flags.join(QLatin1String("|"))) << ")";
    }
    return debug;
}

QDebug operator<<(QDebug debug, const QDir &dir)
{
    debug.maybeSpace() << "QDir(" << dir.path()
                       << ", nameFilters = {"
                       << qPrintable(dir.nameFilters().join(QLatin1String(",")))
                       << "}, "
                       << dir.sorting()
                       << ","
                       << dir.filter()
                       << ")";
    return debug.space();
}



#endif

QT_END_NAMESPACE