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39
40 #ifndef QFUNCTIONS_FAKE_ENV_P_H
41 #define QFUNCTIONS_FAKE_ENV_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 "qbytearray.h"
55 #include "qvector.h"
56
57 QT_BEGIN_NAMESPACE
58
59 // Environment ------------------------------------------------------
60 struct Variable {
VariableVariable61 Variable() { }
62
VariableVariable63 Variable(const QByteArray &name, const QByteArray &value)
64 : name(name), value(value) { }
65
66 QByteArray name;
67 QByteArray value;
68 };
69
70 Q_DECLARE_TYPEINFO(Variable, Q_MOVABLE_TYPE);
71
72 struct NameEquals {
73 typedef bool result_type;
74 const char *name;
NameEqualsNameEquals75 explicit NameEquals(const char *name) noexcept : name(name) {}
operatorNameEquals76 result_type operator()(const Variable &other) const noexcept
77 { return qstrcmp(other.name, name) == 0; }
78 };
79
80 #ifndef Q_CLANG_QDOC
Q_GLOBAL_STATIC(QVector<Variable>,qt_app_environment)81 Q_GLOBAL_STATIC(QVector<Variable>, qt_app_environment)
82 #endif
83
84 errno_t qt_fake_getenv_s(size_t *sizeNeeded, char *buffer, size_t bufferSize, const char *varName)
85 {
86 if (!sizeNeeded)
87 return EINVAL;
88
89 QVector<Variable>::const_iterator end = qt_app_environment->constEnd();
90 QVector<Variable>::const_iterator iterator = std::find_if(qt_app_environment->constBegin(),
91 end,
92 NameEquals(varName));
93 if (iterator == end) {
94 if (buffer)
95 buffer[0] = '\0';
96 return ENOENT;
97 }
98
99 const int size = iterator->value.size() + 1;
100 if (bufferSize < size_t(size)) {
101 *sizeNeeded = size;
102 return ERANGE;
103 }
104
105 qstrcpy(buffer, iterator->value.constData());
106 return 0;
107 }
108
qt_fake__putenv_s(const char * varName,const char * value)109 errno_t qt_fake__putenv_s(const char *varName, const char *value)
110 {
111 QVector<Variable>::iterator end = qt_app_environment->end();
112 QVector<Variable>::iterator iterator = std::find_if(qt_app_environment->begin(),
113 end,
114 NameEquals(varName));
115 if (!value || !*value) {
116 if (iterator != end)
117 qt_app_environment->erase(iterator);
118 } else {
119 if (iterator == end)
120 qt_app_environment->append(Variable(varName, value));
121 else
122 iterator->value = value;
123 }
124
125 return 0;
126 }
127
128 QT_END_NAMESPACE
129
130 #endif // QFUNCTIONS_FAKE_ENV_P_H
131