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Use the correct size argument for wcsxfrm

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The documentation says that the size argument to wcsxfrm should include
the null terminating character. Currently it doesn't, which breaks
collation, as the last character is omitted.

Task-number: QTBUG-109954
Change-Id: Ic0c78a617ed1d50e31e50cae56e21675d2069ead
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Mikolaj Boc 2023-01-09 16:08:52 +01:00
parent 696ad54e5d
commit 80686be086
1 changed files with 12 additions and 6 deletions
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18
src/corelib/text/qcollator_posix.cpp
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@ -69,13 +69,19 @@ QCollatorSortKey QCollator::sortKey(const QString &string) const
if (d->isC()) {
std::copy(original.cbegin(), original.cend(), result.begin());
} else {
size_t size = std::wcsxfrm(result.data(), original.constData(), string.size());
if (size > size_t(result.size())) {
result.resize(size+1);
size = std::wcsxfrm(result.data(), original.constData(), string.size());
auto availableSizeIncludingNullTerminator = result.size();
size_t neededSizeExcludingNullTerminator = std::wcsxfrm(
result.data(), original.constData(), availableSizeIncludingNullTerminator);
if (neededSizeExcludingNullTerminator > size_t(availableSizeIncludingNullTerminator - 1)) {
result.resize(neededSizeExcludingNullTerminator + 1);
availableSizeIncludingNullTerminator = result.size();
neededSizeExcludingNullTerminator = std::wcsxfrm(result.data(), original.constData(),
availableSizeIncludingNullTerminator);
Q_ASSERT(neededSizeExcludingNullTerminator
== size_t(availableSizeIncludingNullTerminator - 1));
}
result.resize(size+1);
result[size] = 0;
result.resize(neededSizeExcludingNullTerminator + 1);
result[neededSizeExcludingNullTerminator] = 0;
}
return QCollatorSortKey(new QCollatorSortKeyPrivate(std::move(result)));
}