CompilationDatabase: Support both code models

Extract headers, defines and fileKind from flags in
order to have complete project parts.

Side-effect: better support for MSVC-specific flags.
Change-Id: Iaa1413c91c96c3cf89ddbe76a7a1f0f46c5289c0
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/compilationdatabaseprojectmanager/compilationdatabaseutils.h

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+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "compilationdatabaseconstants.h"
+
+#include <cpptools/cppprojectfile.h>
+
+#include <QStringList>
+
+namespace ProjectExplorer {
+class HeaderPath;
+class Macro;
+}
+
+namespace CompilationDatabaseProjectManager {
+
+void filteredFlags(const QString &fileName,
+                   const QString &workingDir,
+                   QStringList &flags,
+                   QVector<ProjectExplorer::HeaderPath> &headerPaths,
+                   QVector<ProjectExplorer::Macro> &macros,
+                   CppTools::ProjectFile::Kind &fileKind);
+
+QStringList splitCommandLine(QString commandLine);
+
+} // namespace CompilationDatabaseProjectManager