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// Copyright (C) 2021 The Qt Company Ltd.
// Copyright (C) 2013 Aleix Pol Gonzalez <aleixpol@kde.org>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qcollator_p.h"
#include "qstringlist.h"
#include "qstring.h"
#include "qvarlengtharray.h"
#include <cstring>
#include <cwchar>
QT_BEGIN_NAMESPACE
void QCollatorPrivate::init()
{
if (!isC()) {
if (locale != QLocale::system().collation()) {
qWarning("Only the C and system collation locales are supported "
"with the POSIX collation implementation");
}
if (caseSensitivity != Qt::CaseSensitive)
qWarning("Case insensitive sorting unsupported in the posix collation implementation");
}
if (numericMode)
qWarning("Numeric mode unsupported in the posix collation implementation");
if (ignorePunctuation)
qWarning("Ignoring punctuation unsupported in the posix collation implementation");
dirty = false;
}
void QCollatorPrivate::cleanup()
{
}
static void stringToWCharArray(QVarLengthArray<wchar_t> &ret, QStringView string)
{
ret.resize(string.length());
qsizetype len = string.toWCharArray(ret.data());
ret.resize(len+1);
ret[len] = 0;
}
int QCollator::compare(QStringView s1, QStringView s2) const
{
if (!s1.size())
return s2.size() ? -1 : 0;
if (!s2.size())
return +1;
if (d->isC())
return s1.compare(s2, caseSensitivity());
d->ensureInitialized();
QVarLengthArray<wchar_t> array1, array2;
stringToWCharArray(array1, s1);
stringToWCharArray(array2, s2);
return std::wcscoll(array1.constData(), array2.constData());
}
QCollatorSortKey QCollator::sortKey(const QString &string) const
{
d->ensureInitialized();
QVarLengthArray<wchar_t> original;
stringToWCharArray(original, string);
QList<wchar_t> result(original.size());
if (d->isC()) {
std::copy(original.cbegin(), original.cend(), result.begin());
} else {
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(neededSizeExcludingNullTerminator + 1);
result[neededSizeExcludingNullTerminator] = 0;
}
return QCollatorSortKey(new QCollatorSortKeyPrivate(std::move(result)));
}
int QCollatorSortKey::compare(const QCollatorSortKey &otherKey) const
{
return std::wcscmp(d->m_key.constData(), otherKey.d->m_key.constData());
}
QT_END_NAMESPACE
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