1 files changed, 122 insertions, 0 deletions
diff --git a/sources/shiboken6/ApiExtractor/conditionalstreamreader.cpp b/sources/shiboken6/ApiExtractor/conditionalstreamreader.cpp
new file mode 100644
index 000000000..2380ee892
--- /dev/null
+++ b/sources/shiboken6/ApiExtractor/conditionalstreamreader.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt for Python.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "conditionalstreamreader.h"
+
+#include <QtCore/QDebug>
+
+QXmlStreamReader::TokenType ConditionalStreamReader::readNext()
+{
+    auto exToken = readNextInternal();
+    if (exToken.second != PiTokens::If || conditionMatches())
+        return exToken.first;
+
+    // Condition does not match - search for endif
+    int nestingLevel = 1;
+    while (true) {
+        exToken = readNextInternal();
+        if (exToken.first == QXmlStreamReader::NoToken
+            || exToken.first == QXmlStreamReader::Invalid
+            || exToken.first == QXmlStreamReader::EndDocument) {
+            break;
+        }
+
+        if (exToken.second == PiTokens::If)
+            ++nestingLevel;
+        else if (exToken.second == PiTokens::Endif && --nestingLevel == 0)
+            break;
+    }
+    return exToken.first;
+}
+
+bool ConditionalStreamReader::conditionMatches() const
+{
+    const auto keywords = m_reader.processingInstructionData().split(u' ', Qt::SkipEmptyParts);
+
+    bool matches = false;
+    for (const auto &keyword : keywords) {
+        if (keyword.startsWith(u'!')) { // exclusion '!windows' takes preference
+            if (m_conditions.contains(keyword.mid(1)))
+                return false;
+        } else {
+            matches |= m_conditions.contains(keyword);
+        }
+    }
+    return matches;
+}
+
+void ConditionalStreamReader::setConditions(const QStringList &newConditions)
+{
+    m_conditions = newConditions + platformConditions();
+}
+
+QStringList ConditionalStreamReader::platformConditions()
+{
+    QStringList result;
+#if defined (Q_OS_UNIX)
+    result << QStringLiteral("unix");
+#endif
+
+#if defined (Q_OS_LINUX)
+    result << QStringLiteral("linux");
+#elif defined (Q_OS_MACOS)
+    result << QStringLiteral("darwin");
+#elif defined (Q_OS_WINDOWS)
+    result << QStringLiteral("windows");
+#endif
+    return result;
+}
+
+ConditionalStreamReader::ExtendedToken ConditionalStreamReader::readNextInternal()
+{
+    const auto token = m_reader.readNext();
+    PiTokens piToken = PiTokens::None;
+    if (token == QXmlStreamReader::ProcessingInstruction) {
+        const auto target = m_reader.processingInstructionTarget();
+        if (target == u"if")
+            piToken = PiTokens::If;
+        else if (target == u"endif")
+            piToken = PiTokens::Endif;
+    }
+    return {token, piToken};
+}
+
+QDebug operator<<(QDebug dbg, const QXmlStreamAttributes &attrs)
+{
+    QDebugStateSaver saver(dbg);
+    dbg.noquote();
+    dbg.nospace();
+    dbg << "QXmlStreamAttributes(";
+    for (qsizetype i = 0, size = attrs.size(); i < size; ++i ) {
+        if (i)
+            dbg << ", ";
+        dbg << attrs.at(i).name() << "=\"" << attrs.at(i).value() << '"';
+    }
+    dbg << ')';
+    return dbg;
+}