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
|
// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QSTRINGCONVERTER_BASE_H
#define QSTRINGCONVERTER_BASE_H
#if 0
// QStringConverter(Base) class are handled in qstringconverter
#pragma qt_sync_stop_processing
#endif
#include <optional>
#include <QtCore/qglobal.h> // QT_{BEGIN,END}_NAMESPACE
#include <QtCore/qflags.h> // Q_DECLARE_FLAGS
#include <QtCore/qcontainerfwd.h>
#include <cstring>
QT_BEGIN_NAMESPACE
class QByteArrayView;
class QChar;
class QByteArrayView;
class QStringView;
class QStringConverterBase
{
public:
enum class Flag {
Default = 0,
Stateless = 0x1,
ConvertInvalidToNull = 0x2,
WriteBom = 0x4,
ConvertInitialBom = 0x8,
UsesIcu = 0x10,
};
Q_DECLARE_FLAGS(Flags, Flag)
struct State {
constexpr State(Flags f = Flag::Default) noexcept
: flags(f), state_data{0, 0, 0, 0} {}
~State() { clear(); }
State(State &&other) noexcept
: flags(other.flags),
remainingChars(other.remainingChars),
invalidChars(other.invalidChars),
state_data{other.state_data[0], other.state_data[1],
other.state_data[2], other.state_data[3]},
clearFn(other.clearFn)
{ other.clearFn = nullptr; }
State &operator=(State &&other) noexcept
{
clear();
flags = other.flags;
remainingChars = other.remainingChars;
invalidChars = other.invalidChars;
std::memmove(state_data, other.state_data, sizeof state_data); // self-assignment-safe
clearFn = other.clearFn;
other.clearFn = nullptr;
return *this;
}
Q_CORE_EXPORT void clear() noexcept;
Q_CORE_EXPORT void reset() noexcept;
Flags flags;
int internalState = 0;
qsizetype remainingChars = 0;
qsizetype invalidChars = 0;
union {
uint state_data[4];
void *d[2];
};
using ClearDataFn = void (*)(State *) noexcept;
ClearDataFn clearFn = nullptr;
private:
Q_DISABLE_COPY(State)
};
protected:
~QStringConverterBase() = default;
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QStringConverterBase::Flags)
class QStringConverter : public QStringConverterBase
{
public:
enum Encoding {
Utf8,
#ifndef QT_BOOTSTRAPPED
Utf16,
Utf16LE,
Utf16BE,
Utf32,
Utf32LE,
Utf32BE,
#endif
Latin1,
System,
LastEncoding = System
};
#ifdef Q_QDOC
// document the flags here
enum class Flag {
Default = 0,
Stateless = 0x1,
ConvertInvalidToNull = 0x2,
WriteBom = 0x4,
ConvertInitialBom = 0x8,
UsesIcu = 0x10,
};
Q_DECLARE_FLAGS(Flags, Flag)
#endif
protected:
struct Interface
{
using DecoderFn = QChar * (*)(QChar *out, QByteArrayView in, State *state);
using LengthFn = qsizetype (*)(qsizetype inLength);
using EncoderFn = char * (*)(char *out, QStringView in, State *state);
const char *name = nullptr;
DecoderFn toUtf16 = nullptr;
LengthFn toUtf16Len = nullptr;
EncoderFn fromUtf16 = nullptr;
LengthFn fromUtf16Len = nullptr;
};
constexpr QStringConverter() noexcept
: iface(nullptr)
{}
constexpr explicit QStringConverter(Encoding encoding, Flags f)
: iface(&encodingInterfaces[qsizetype(encoding)]), state(f)
{}
constexpr explicit QStringConverter(const Interface *i) noexcept
: iface(i)
{}
Q_CORE_EXPORT explicit QStringConverter(const char *name, Flags f);
~QStringConverter() = default;
public:
QStringConverter(QStringConverter &&) = default;
QStringConverter &operator=(QStringConverter &&) = default;
bool isValid() const noexcept { return iface != nullptr; }
void resetState() noexcept
{
state.reset();
}
bool hasError() const noexcept { return state.invalidChars != 0; }
Q_CORE_EXPORT const char *name() const noexcept;
Q_CORE_EXPORT static std::optional<Encoding> encodingForName(const char *name) noexcept;
Q_CORE_EXPORT static const char *nameForEncoding(Encoding e);
Q_CORE_EXPORT static std::optional<Encoding>
encodingForData(QByteArrayView data, char16_t expectedFirstCharacter = 0) noexcept;
Q_CORE_EXPORT static std::optional<Encoding> encodingForHtml(QByteArrayView data);
Q_CORE_EXPORT static QStringList availableCodecs();
protected:
const Interface *iface;
State state;
private:
Q_CORE_EXPORT static const Interface encodingInterfaces[Encoding::LastEncoding + 1];
};
QT_END_NAMESPACE
#endif
|
