QuaZip quazip-1-3
quazip_qt_compat.h
1#ifndef QUAZIP_QT_COMPAT_H
2#define QUAZIP_QT_COMPAT_H
3
4/*
5 * For some reason, Qt 5.14 and 5.15 introduced a whole mess of seemingly random
6 * moves and deprecations. To avoid populating code with #ifs,
7 * we handle this stuff here, as well as some other compatibility issues.
8 *
9 * Some includes are repeated just in case we want to split this file later.
10 */
11
12#include <QtCore/Qt>
13#include <QtCore/QtGlobal>
14
15// Legacy encodings are still everywhere, but the Qt team decided we
16// don't need them anymore and moved them out of Core in Qt 6.
17#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
18# include <QtCore5Compat/QTextCodec>
19#else
20# include <QtCore/QTextCodec>
21#endif
22
23// QSaveFile terribly breaks the is-a idiom (Liskov substitution principle):
24// QSaveFile is-a QIODevice, but it makes close() private and aborts
25// if you call it through the base class. Hence this ugly hack:
26#if (QT_VERSION >= 0x050100)
27#include <QtCore/QSaveFile>
28inline bool quazip_close(QIODevice *device) {
29 QSaveFile *file = qobject_cast<QSaveFile*>(device);
30 if (file != nullptr) {
31 // We have to call the ugly commit() instead:
32 return file->commit();
33 } else {
34 device->close();
35 return true;
36 }
37}
38#else
39inline bool quazip_close(QIODevice *device) {
40 device->close();
41 return true;
42}
43#endif
44
45// this is yet another stupid move and deprecation
46#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
47using Qt::SkipEmptyParts;
48#else
49#include <QtCore/QString>
50const auto SkipEmptyParts = QString::SplitBehavior::SkipEmptyParts;
51#endif
52
53// and yet another... (why didn't they just make qSort delegate to std::sort?)
54#include <QtCore/QList>
55#if (QT_VERSION >= QT_VERSION_CHECK(5, 2, 0))
56#include <algorithm>
57template<typename T, typename C>
58inline void quazip_sort(T begin, T end, C comparator) {
59 std::sort(begin, end, comparator);
60}
61#else
62#include <QtCore/QtAlgorithms>
63template<typename T, typename C>
64inline void quazip_sort(T begin, T end, C comparator) {
65 qSort(begin, end, comparator);
66}
67#endif
68
69// this is a stupid rename...
70#include <QtCore/QDateTime>
71#include <QtCore/QFileInfo>
72#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
73inline QDateTime quazip_ctime(const QFileInfo &fi) {
74 return fi.birthTime();
75}
76#else
77inline QDateTime quazip_ctime(const QFileInfo &fi) {
78 return fi.created();
79}
80#endif
81
82// this is just a slightly better alternative
83#include <QtCore/QFileInfo>
84#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
85inline bool quazip_is_symlink(const QFileInfo &fi) {
86 return fi.isSymbolicLink();
87}
88#else
89inline bool quazip_is_symlink(const QFileInfo &fi) {
90 // also detects *.lnk on Windows, but better than nothing
91 return fi.isSymLink();
92}
93#endif
94
95// I'm not even sure what this one is, but nevertheless
96#include <QtCore/QFileInfo>
97#if (QT_VERSION >= QT_VERSION_CHECK(5, 13, 0))
98inline QString quazip_symlink_target(const QFileInfo &fi) {
99 return fi.symLinkTarget();
100}
101#else
102inline QString quazip_symlink_target(const QFileInfo &fi) {
103 return fi.readLink(); // What's the difference? I've no idea.
104}
105#endif
106
107// this is not a deprecation but an improvement, for a change
108#include <QtCore/QDateTime>
109#if (QT_VERSION >= 0x040700)
110inline quint64 quazip_ntfs_ticks(const QDateTime &time, int fineTicks) {
111 QDateTime base(QDate(1601, 1, 1), QTime(0, 0), Qt::UTC);
112 return base.msecsTo(time) * 10000 + fineTicks;
113}
114#else
115inline quint64 quazip_ntfs_ticks(const QDateTime &time, int fineTicks) {
116 QDateTime base(QDate(1601, 1, 1), QTime(0, 0), Qt::UTC);
117 QDateTime utc = time.toUTC();
118 return (static_cast<qint64>(base.date().daysTo(utc.date()))
119 * Q_INT64_C(86400000)
120 + static_cast<qint64>(base.time().msecsTo(utc.time())))
121 * Q_INT64_C(10000) + fineTicks;
122}
123#endif
124
125// yet another improvement...
126#include <QtCore/QDateTime>
127#if QT_VERSION >= QT_VERSION_CHECK(5, 8, 0) // Yay! Finally a way to get time as qint64!
128inline qint64 quazip_to_time64_t(const QDateTime &time) {
129 return time.toSecsSinceEpoch();
130}
131#else
132inline qint64 quazip_to_time64_t(const QDateTime &time) {
133 return static_cast<qint64>(time.toTime_t()); // 32 bits only, but better than nothing
134}
135#endif
136
137#include <QtCore/QTextStream>
138// and another stupid move
139#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
140const auto quazip_endl = Qt::endl;
141#else
142const auto quazip_endl = endl;
143#endif
144
145#endif // QUAZIP_QT_COMPAT_H