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++ // Copyright (C) 2017 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Marc Mutz <marc.mutz@kdab.com>
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++ // Qt-Security score:critical reason:data-parser
++
++ #ifndef QSTRINGALGORITHMS_H
++ #define QSTRINGALGORITHMS_H
++
++ #include <QtCore/qbytearrayalgorithms.h>
++ #include <QtCore/qcontainerfwd.h>
++ #include <QtCore/qnamespace.h>
++ #include <QtCore/qstringfwd.h>
++ #if 0
++ #pragma qt_class(QStringAlgorithms)
++ #endif
++
++ #include <algorithm> // std::find
++ #include <iterator> // std::size
++
++ #include <QtCore/q20type_traits.h> // q20::is_constant_evaluated
++
++ QT_BEGIN_NAMESPACE
++
++ namespace QtPrivate {
++
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype qustrlen(const char16_t *str) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype qustrnlen(const char16_t *str, qsizetype maxlen) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION const char16_t *qustrchr(QStringView str, char16_t ch) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION const char16_t *qustrcasechr(QStringView str, char16_t ch) noexcept;
++
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION int compareStrings(QStringView lhs, QStringView rhs, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION int compareStrings(QStringView lhs, QLatin1StringView rhs, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION int compareStrings(QStringView lhs, QBasicUtf8StringView<false> rhs, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION int compareStrings(QLatin1StringView lhs, QStringView rhs, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION int compareStrings(QLatin1StringView lhs, QLatin1StringView rhs, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION int compareStrings(QLatin1StringView lhs, QBasicUtf8StringView<false> rhs, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION int compareStrings(QBasicUtf8StringView<false> lhs, QStringView rhs, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION int compareStrings(QBasicUtf8StringView<false> lhs, QLatin1StringView rhs, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION int compareStrings(QBasicUtf8StringView<false> lhs, QBasicUtf8StringView<false> rhs, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool equalStrings(QStringView lhs, QStringView rhs) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool equalStrings(QStringView lhs, QLatin1StringView rhs) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool equalStrings(QStringView lhs, QBasicUtf8StringView<false> rhs) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool equalStrings(QLatin1StringView lhs, QStringView rhs) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool equalStrings(QLatin1StringView lhs, QLatin1StringView rhs) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool equalStrings(QLatin1StringView lhs, QBasicUtf8StringView<false> rhs) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool equalStrings(QBasicUtf8StringView<false> lhs, QStringView rhs) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool equalStrings(QBasicUtf8StringView<false> lhs, QLatin1StringView rhs) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool equalStrings(QBasicUtf8StringView<false> lhs, QBasicUtf8StringView<false> rhs) noexcept;
++
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool startsWith(QStringView haystack, QStringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool startsWith(QStringView haystack, QLatin1StringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool startsWith(QLatin1StringView haystack, QStringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool startsWith(QLatin1StringView haystack, QLatin1StringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool endsWith(QStringView haystack, QStringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool endsWith(QStringView haystack, QLatin1StringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool endsWith(QLatin1StringView haystack, QStringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool endsWith(QLatin1StringView haystack, QLatin1StringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++
++ [[nodiscard]] inline qsizetype findString(QStringView str, qsizetype from, QChar needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype findString(QStringView haystack, qsizetype from, QStringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype findString(QStringView haystack, qsizetype from, QLatin1StringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype findString(QLatin1StringView haystack, qsizetype from, QStringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype findString(QLatin1StringView haystack, qsizetype from, QLatin1StringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype lastIndexOf(QStringView haystack, qsizetype from, char16_t needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype lastIndexOf(QStringView haystack, qsizetype from, QStringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype lastIndexOf(QStringView haystack, qsizetype from, QLatin1StringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype lastIndexOf(QLatin1StringView haystack, qsizetype from, QStringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype lastIndexOf(QLatin1StringView haystack, qsizetype from, QLatin1StringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION QStringView trimmed(QStringView s) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION QLatin1StringView trimmed(QLatin1StringView s) noexcept;
++
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool isLower(QStringView s) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool isUpper(QStringView s) noexcept;
++
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype count(QStringView haystack, QChar needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype count(QStringView haystack, QStringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype count(QStringView haystack, QLatin1StringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive);
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype count(QLatin1StringView haystack, QLatin1StringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive);
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype count(QLatin1StringView haystack, QStringView needle, Qt::CaseSensitivity cs = Qt::CaseSensitive);
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION qsizetype count(QLatin1StringView haystack, QChar needle, Qt::CaseSensitivity cs = Qt::CaseSensitive) noexcept;
++
++ #if QT_CONFIG(regularexpression)
++ // ### Qt 7: unify these overloads;
++ // remove the ones taking only a QStringView, export the others, adjust callers
++ [[nodiscard]] qsizetype indexOf(QStringView viewHaystack,
++ const QString *stringHaystack,
++ const QRegularExpression &re,
++ qsizetype from = 0,
++ QRegularExpressionMatch *rmatch = nullptr);
++ [[nodiscard]] Q_CORE_EXPORT qsizetype indexOf(QStringView haystack,
++ const QRegularExpression &re,
++ qsizetype from = 0,
++ QRegularExpressionMatch *rmatch = nullptr);
++ [[nodiscard]] qsizetype lastIndexOf(QStringView viewHaystack,
++ const QString *stringHaystack,
++ const QRegularExpression &re,
++ qsizetype from = -1,
++ QRegularExpressionMatch *rmatch = nullptr);
++ [[nodiscard]] Q_CORE_EXPORT qsizetype lastIndexOf(QStringView haystack,
++ const QRegularExpression &re,
++ qsizetype from = -1,
++ QRegularExpressionMatch *rmatch = nullptr);
++ [[nodiscard]] bool contains(QStringView viewHaystack,
++ const QString *stringHaystack,
++ const QRegularExpression &re,
++ QRegularExpressionMatch *rmatch = nullptr);
++ [[nodiscard]] Q_CORE_EXPORT bool contains(QStringView haystack,
++ const QRegularExpression &re,
++ QRegularExpressionMatch *rmatch = nullptr);
++ [[nodiscard]] Q_CORE_EXPORT qsizetype count(QStringView haystack, const QRegularExpression &re);
++ #endif
++
++ [[nodiscard]] Q_CORE_EXPORT QString convertToQString(QAnyStringView s);
++
++ [[nodiscard]] Q_CORE_EXPORT QByteArray convertToLatin1(QStringView str);
++ [[nodiscard]] Q_CORE_EXPORT QByteArray convertToUtf8(QStringView str);
++ [[nodiscard]] Q_CORE_EXPORT QByteArray convertToLocal8Bit(QStringView str);
++ [[nodiscard]] Q_CORE_EXPORT QList<uint> convertToUcs4(QStringView str); // ### Qt 7 char32_t
++
++ [[nodiscard]] Q_CORE_EXPORT QByteArray convertToUtf8(QLatin1StringView str);
++
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool isRightToLeft(QStringView string) noexcept;
++
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool isAscii(QLatin1StringView s) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool isAscii(QStringView s) noexcept;
++ [[nodiscard]] constexpr inline bool isLatin1(QLatin1StringView s) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool isLatin1(QStringView s) noexcept;
++ [[nodiscard]] Q_CORE_EXPORT Q_DECL_PURE_FUNCTION bool isValidUtf16(QStringView s) noexcept;
++
++ template <typename Char, size_t N> [[nodiscard]] Q_ALWAYS_INLINE constexpr
++ qsizetype lengthHelperContainerLoop(const Char (&str)[N])
++ {
++ #if defined(__cpp_lib_constexpr_algorithms) && defined(Q_CC_GNU_ONLY)
++ // libstdc++'s std::find / std::find_if manages to execute more steps
++ // than the loop below
++ const auto it = std::find(str, str + N, Char(0));
++ return it - str;
++ #else
++ // std::char_traits<C> is deprecated for C not one of the standard char
++ // types, so we have to roll out our own loop.
++ for (size_t i = 0; i < N; ++i) {
++ if (str[i] == Char(0))
++ return qsizetype(i);
++ }
++ return qsizetype(N);
++ #endif
++ }
++
++ template <typename Char, size_t N> [[nodiscard]] Q_ALWAYS_INLINE constexpr
++ std::enable_if_t<sizeof(Char) == sizeof(char16_t), qsizetype>
++ lengthHelperContainer(const Char (&str)[N])
++ {
++ // The following values were empirically determined to detect the threshold
++ // at which the compiler gives up pre-calculating the std::find() below and
++ // instead inserts code to be executed at runtime.
++ constexpr size_t RuntimeThreshold =
++ #if defined(Q_CC_CLANG)
++ // tested on Clang 15, 16 & 17
++ 1023
++ #elif defined(Q_CC_GNU)
++ // tested through GCC 13.1 at -O3 compilation level
++ // note: at -O2, GCC always generates a loop!
++ __cplusplus >= 202002L ? 39 : 17
++ #else
++ 0
++ #endif
++ ;
++ if constexpr (N == 1) {
++ return str[0] == Char(0) ? 0 : 1;
++ } else if constexpr (N > RuntimeThreshold) {
++ #ifdef QT_SUPPORTS_IS_CONSTANT_EVALUATED
++ if (!q20::is_constant_evaluated())
++ return QtPrivate::qustrnlen(reinterpret_cast<const char16_t *>(str), N);
++ #endif
++ }
++
++ return lengthHelperContainerLoop(str);
++ }
++
++ inline qsizetype qstrnlen_helper(const char *str, size_t maxlen)
++ {
++ #if !defined(Q_COMPILER_SLOW_QSTRNLEN_COMPILATION)
++ return qstrnlen(str, maxlen);
++ #else
++ return strnlen_s(str, maxlen);
++ #endif
++ }
++
++ template <typename Char, size_t N> [[nodiscard]] constexpr inline
++ std::enable_if_t<sizeof(Char) == 1, qsizetype> lengthHelperContainer(const Char (&str)[N])
++ {
++ #ifdef QT_SUPPORTS_IS_CONSTANT_EVALUATED
++ if (!q20::is_constant_evaluated())
++ return qstrnlen_helper(reinterpret_cast<const char *>(str), N);
++ #endif
++
++ return lengthHelperContainerLoop(str);
++ }
++
++ template <typename Container>
++ constexpr qsizetype lengthHelperContainer(const Container &c) noexcept
++ {
++ return qsizetype(std::size(c));
++ }
++ } // namespace QtPrivate
++
++ QT_END_NAMESPACE
++
++ #endif // QSTRINGALGORTIHMS_H