Clang: Extend clang query

It's a first step to introduce clang query.

Change-Id: I4d001a8883f56066765ce6bc561fa3f49611c0a4
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/tools/clangrefactoringbackend/source/sourcerangeextractor.h

@@ -0,0 +1,88 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 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 <vector>
+
+using uint = unsigned int;
+
+namespace Utils {
+template <uint Size>
+class BasicSmallString;
+using SmallString = BasicSmallString<31>;
+}
+
+namespace llvm {
+class StringRef;
+}
+
+namespace clang {
+class SourceManager;
+class LangOptions;
+class SourceRange;
+class FullSourceLoc;
+}
+
+namespace ClangBackEnd {
+
+class SourceRangesContainer;
+class SourceRangeWithTextContainer;
+
+class SourceRangeExtractor
+{
+public:
+    SourceRangeExtractor(const clang::SourceManager &sourceManager,
+                         const clang::LangOptions &languageOptions,
+                         SourceRangesContainer &sourceRangesContainer);
+
+    void addSourceRange(const clang::SourceRange &sourceRange);
+    void addSourceRanges(const std::vector<clang::SourceRange> &sourceRanges);
+
+    const std::vector<SourceRangeWithTextContainer> &sourceRangeWithTextContainers() const;
+
+    static const char *findStartOfLineInBuffer(const llvm::StringRef buffer, uint startOffset);
+    static const char *findEndOfLineInBuffer(llvm::StringRef buffer, uint endOffset);
+    static Utils::SmallString getExpandedText(llvm::StringRef buffer, uint startOffset, uint endOffset);
+
+    const clang::SourceRange extendSourceRangeToLastTokenEnd(const clang::SourceRange sourceRange);
+
+private:
+    void insertSourceRange(uint fileHash,
+                           Utils::SmallString &&directoryPath,
+                           Utils::SmallString &&fileName,
+                           const clang::FullSourceLoc &startLocation,
+                           uint startOffset,
+                           const clang::FullSourceLoc &endLocation,
+                           uint endOffset,
+                           Utils::SmallString &&lineSnippet);
+
+private:
+    const clang::SourceManager &sourceManager;
+    const clang::LangOptions &languageOptions;
+    SourceRangesContainer &sourceRangesContainer;
+};
+
+} // namespace ClangBackEnd