Cppcheck: Add cppcheck static analysis tool

Automatically checks currently opened documents and displays results via text marks/annotations.

CppcheckTrigger detects when to check files or clear results.
CppcheckTextMarkManager stores/clears text marks with checks' results.
CppcheckTool generates run arguments and parses output.
CppcheckRunner runs cppcheck binary.
CppcheckOptions configures CppcheckTool.

Task-number: QTCREATORBUG-20418
Change-Id: I8eafeac7af6137d2c9061ae75d4a56c85b3b5a2d
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

src/plugins/cppcheck/cppchecktextmark.h

@@ -0,0 +1,55 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 Sergey Morozov
+** 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 "cppcheckdiagnostic.h"
+
+#include <texteditor/textmark.h>
+
+namespace Cppcheck {
+namespace Internal {
+
+class CppcheckTextMark final : public TextEditor::TextMark
+{
+public:
+    explicit CppcheckTextMark(const Diagnostic &diagnostic);
+
+    bool operator==(const Diagnostic &r) const {
+        return lineNumber() == r.lineNumber
+                && (std::tie(m_severity, m_checkId, m_message) ==
+                    std::tie(r.severity, r.checkId, r.message));
+    }
+
+private:
+    QString toolTipText(const QString &severityText) const;
+
+    Diagnostic::Severity m_severity = Diagnostic::Severity::Information;
+    QString m_checkId;
+    QString m_message;
+};
+
+} // namespace Internal
+} // namespace Cppcheck