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check if string is normalized before normalizing it from QString::normalized()

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Signed-off-by: Ivailo Monev <xakepa10@laimg.moc>
This commit is contained in:
Ivailo Monev 2019-12-24 21:29:36 +00:00
parent d236165d11
commit a30c6c494a
1 changed files with 13 additions and 6 deletions
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19
src/core/tools/qstring.cpp
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@ -5745,17 +5745,24 @@ QString QString::normalized(QString::NormalizationForm mode, QChar::UnicodeVersi
}
error = U_ZERO_ERROR;
const int srcsize = size();
QString result(QMAXUSTRLEN(srcsize), Qt::Uninitialized);
const bool normresult = unorm2_isNormalized(normalizer,
reinterpret_cast<const UChar*>(unicode()), size(), &error);
if (Q_UNLIKELY(U_FAILURE(error))) {
qWarning("QString::normalized: unorm2_isNormalized() failed %s", u_errorName(error));
return QString();
} else if (normresult) {
// already normalized
return *this;
}
error = U_ZERO_ERROR;
QString result(QMAXUSTRLEN(size()), Qt::Uninitialized);
const int decresult = unorm2_normalize(normalizer,
reinterpret_cast<const UChar*>(unicode()), srcsize,
reinterpret_cast<const UChar*>(unicode()), size(),
reinterpret_cast<UChar*>(result.data()), result.size(), &error);
if (Q_UNLIKELY(U_FAILURE(error))) {
qWarning("QString::normalized: unorm2_normalize() failed %s", u_errorName(error));
return QString();
} else if (Q_UNLIKELY(decresult < 1)) {
// no normalization value
return *this;
}
result.resize(decresult);