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39
40#ifndef QMIMEMAGICRULE_P_H
41#define QMIMEMAGICRULE_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <QtCore/private/qglobal_p.h>
55
56QT_REQUIRE_CONFIG(mimetype);
57
58#include <QtCore/qbytearray.h>
59#include <QtCore/qscopedpointer.h>
60#include <QtCore/qlist.h>
61
62QT_BEGIN_NAMESPACE
63
64class QMimeMagicRule
65{
66public:
67 enum Type { Invalid = 0, String, Host16, Host32, Big16, Big32, Little16, Little32, Byte };
68
69 QMimeMagicRule(const QString &typeStr, const QByteArray &value, const QString &offsets,
70 const QByteArray &mask, QString *errorString);
71
72 void swap(QMimeMagicRule &other) noexcept
73 {
74 qSwap(value1&: m_type, value2&: other.m_type);
75 qSwap(value1&: m_value, value2&: other.m_value);
76 qSwap(value1&: m_startPos, value2&: other.m_startPos);
77 qSwap(value1&: m_endPos, value2&: other.m_endPos);
78 qSwap(value1&: m_mask, value2&: other.m_mask);
79 qSwap(value1&: m_pattern, value2&: other.m_pattern);
80 qSwap(value1&: m_number, value2&: other.m_number);
81 qSwap(value1&: m_numberMask, value2&: other.m_numberMask);
82 qSwap(value1&: m_matchFunction, value2&: other.m_matchFunction);
83 }
84
85 bool operator==(const QMimeMagicRule &other) const;
86
87 Type type() const { return m_type; }
88 QByteArray value() const { return m_value; }
89 int startPos() const { return m_startPos; }
90 int endPos() const { return m_endPos; }
91 QByteArray mask() const;
92
93 bool isValid() const { return m_matchFunction != nullptr; }
94
95 bool matches(const QByteArray &data) const;
96
97 QList<QMimeMagicRule> m_subMatches;
98
99 static Type type(const QByteArray &type);
100 static QByteArray typeName(Type type);
101
102 static bool matchSubstring(const char *dataPtr, int dataSize, int rangeStart, int rangeLength, int valueLength, const char *valueData, const char *mask);
103
104private:
105 Type m_type;
106 QByteArray m_value;
107 int m_startPos;
108 int m_endPos;
109 QByteArray m_mask;
110
111 QByteArray m_pattern;
112 quint32 m_number;
113 quint32 m_numberMask;
114
115 typedef bool (QMimeMagicRule::*MatchFunction)(const QByteArray &data) const;
116 MatchFunction m_matchFunction;
117
118private:
119 // match functions
120 bool matchString(const QByteArray &data) const;
121 template <typename T>
122 bool matchNumber(const QByteArray &data) const;
123};
124Q_DECLARE_SHARED(QMimeMagicRule)
125
126QT_END_NAMESPACE
127
128#endif // QMIMEMAGICRULE_H
129

source code of qtbase/src/corelib/mimetypes/qmimemagicrule_p.h