diff options
Diffstat (limited to 'src/corelib/tools/qcollator_win.cpp')
-rw-r--r-- | src/corelib/tools/qcollator_win.cpp | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/src/corelib/tools/qcollator_win.cpp b/src/corelib/tools/qcollator_win.cpp index 4adbf4adf8..9d81de882f 100644 --- a/src/corelib/tools/qcollator_win.cpp +++ b/src/corelib/tools/qcollator_win.cpp @@ -72,6 +72,8 @@ void QCollatorPrivate::init() if (caseSensitivity == Qt::CaseInsensitive) collator |= NORM_IGNORECASE; + // WINE does not support SORT_DIGITSASNUMBERS :-( + // (and its std::sort() crashes on bad comparisons, QTBUG-74209) if (numericMode) collator |= SORT_DIGITSASNUMBERS; @@ -98,16 +100,36 @@ int QCollator::compare(QStringView s1, QStringView s2) const // runtime convention of comparing strings, the value 2 can be subtracted // from a nonzero return value. Then, the meaning of <0, ==0, and >0 is // consistent with the C runtime. + // [...] The function returns 0 if it does not succeed. + // https://docs.microsoft.com/en-us/windows/desktop/api/stringapiset/nf-stringapiset-comparestringex#return-value #ifndef USE_COMPARESTRINGEX - return CompareString(d->localeID, d->collator, - reinterpret_cast<const wchar_t*>(s1.data()), s1.size(), - reinterpret_cast<const wchar_t*>(s2.data()), s2.size()) - 2; + const int ret = CompareString(d->localeID, d->collator, + reinterpret_cast<const wchar_t *>(s1.data()), s1.size(), + reinterpret_cast<const wchar_t *>(s2.data()), s2.size()); #else - return CompareStringEx(LPCWSTR(d->localeName.utf16()), d->collator, - reinterpret_cast<LPCWSTR>(s1.data()), s1.size(), - reinterpret_cast<LPCWSTR>(s2.data()), s2.size(), NULL, NULL, 0) - 2; + const int ret = CompareStringEx(LPCWSTR(d->localeName.utf16()), d->collator, + reinterpret_cast<LPCWSTR>(s1.data()), s1.size(), + reinterpret_cast<LPCWSTR>(s2.data()), s2.size(), + nullptr, nullptr, 0); #endif + if (Q_LIKELY(ret)) + return ret - 2; + + switch (DWORD error = GetLastError()) { + case ERROR_INVALID_FLAGS: + qWarning("Unsupported flags (%d) used in QCollator", int(d->collator)); + break; + case ERROR_INVALID_PARAMETER: + qWarning("Invalid parameter for QCollator::compare()"); + break; + default: + qWarning("Failed (%ld) comparison in QCollator::compare()", long(error)); + break; + } + // We have no idea what to return, so pretend we think they're equal. + // At least that way we'll be consistent if we get the same values swapped ... + return 0; } QCollatorSortKey QCollator::sortKey(const QString &string) const |