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QString: port toUcs4_helper() to char16_t/char32_t

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This gets rid of 50% of the casts required to call the function, and
removes the last QtCore QStringView(ushort*) user.

As a drive-by, replace an (allowed, but) fishy &str[0] with
str.data(), the mutable overload of which has been available since
C++17.

Task-number: QTBUG-110403
Change-Id: Iad494025b61c53d991e59cc73198bb014a422a93
Reviewed-by: Ahmad Samir <a.samirh78@gmail.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Marc Mutz 2023-01-19 15:53:16 +01:00
parent 11891ae9c9
commit 01ef951c65
3 changed files with 24 additions and 6 deletions
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16
src/corelib/compat/removed_api.cpp
View File

@ -493,3 +493,19 @@ void QXmlStreamWriter::writeStartElement(const QString &namespaceUri, const QStr
// order sections alphabetically to reduce chances of merge conflicts
#endif // QT_CORE_REMOVED_SINCE(6, 5)
#if QT_CORE_REMOVED_SINCE(6, 6)
#include "qstring.h"
qsizetype QString::toUcs4_helper(const ushort *uc, qsizetype length, uint *out)
{
return toUcs4_helper(reinterpret_cast<const char16_t *>(uc), length,
reinterpret_cast<char32_t *>(out));
}
// #include "qotherheader.h"
// // implement removed functions from qotherheader.h
// order sections alphabetically to reduce chances of merge conflicts
#endif // QT_CORE_REMOVED_SINCE(6, 6)

2
src/corelib/text/qstring.cpp
View File

@ -2419,7 +2419,7 @@ void qtWarnAboutInvalidRegularExpression(const QString &pattern, const char *whe
toStdU32String()
*/
qsizetype QString::toUcs4_helper(const ushort *uc, qsizetype length, uint *out)
qsizetype QString::toUcs4_helper(const char16_t *uc, qsizetype length, char32_t *out)
{
qsizetype count = 0;

12
src/corelib/text/qstring.h
View File

@ -859,7 +859,10 @@ private:
static QByteArray toLatin1_helper_inplace(QString &);
static QByteArray toUtf8_helper(const QString &);
static QByteArray toLocal8Bit_helper(const QChar *data, qsizetype size);
static qsizetype toUcs4_helper(const ushort *uc, qsizetype length, uint *out); // ### Qt 7 char16_t
#if QT_CORE_REMOVED_SINCE(6, 6)
static qsizetype toUcs4_helper(const ushort *uc, qsizetype length, uint *out);
#endif
static qsizetype toUcs4_helper(const char16_t *uc, qsizetype length, char32_t *out);
static qlonglong toIntegral_helper(QStringView string, bool *ok, int base);
static qulonglong toIntegral_helper(QStringView string, bool *ok, uint base);
void replace_helper(size_t *indices, qsizetype nIndices, qsizetype blen, const QChar *after, qsizetype alen);
@ -1031,8 +1034,7 @@ qsizetype QStringView::toWCharArray(wchar_t *array) const
memcpy(array, src, sizeof(QChar) * size());
return size();
} else {
return QString::toUcs4_helper(reinterpret_cast<const ushort *>(data()), size(),
reinterpret_cast<uint *>(array));
return QString::toUcs4_helper(utf16(), size(), reinterpret_cast<char32_t *>(array));
}
}
@ -1228,8 +1230,8 @@ inline QString QString::fromStdU32String(const std::u32string &s)
inline std::u32string QString::toStdU32String() const
{
std::u32string u32str(size(), char32_t(0));
qsizetype len = toUcs4_helper(reinterpret_cast<const ushort *>(constData()),
size(), reinterpret_cast<uint*>(&u32str[0]));
const qsizetype len = toUcs4_helper(reinterpret_cast<const char16_t *>(data()),
size(), u32str.data());
u32str.resize(len);
return u32str;
}