collectincludesaction.h 3.32 KB
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/****************************************************************************
**
** 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 "stringcache.h"

#include <collectincludespreprocessorcallbacks.h>

#include <clang/Frontend/FrontendActions.h>
#include <clang/Frontend/CompilerInstance.h>
#include <clang/Lex/Preprocessor.h>

namespace ClangBackEnd {

class CollectIncludesAction final : public clang::PreprocessOnlyAction
{
public:
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    CollectIncludesAction(FilePathIndices &includeIds,
                          FilePathCache<> &filePathCache,
                          FilePathIndices &excludedIncludeUID,
                          FilePathIndices &alreadyIncludedFileUIDs)
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        : m_includeIds(includeIds),
          m_filePathCache(filePathCache),
          m_excludedIncludeUID(excludedIncludeUID),
          m_alreadyIncludedFileUIDs(alreadyIncludedFileUIDs)
    {
    }

    bool BeginSourceFileAction(clang::CompilerInstance &compilerInstance,
                               llvm::StringRef filename) override
    {
      if (clang::PreprocessOnlyAction::BeginSourceFileAction(compilerInstance, filename)) {
          auto &preprocessor = compilerInstance.getPreprocessor();
          auto &headerSearch = preprocessor.getHeaderSearchInfo();
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          preprocessor.SetSuppressIncludeNotFoundError(true);
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          auto macroPreprocessorCallbacks = new CollectIncludesPreprocessorCallbacks(headerSearch,
                                                                                     m_includeIds,
                                                                                     m_filePathCache,
                                                                                     m_excludedIncludeUID,
                                                                                     m_alreadyIncludedFileUIDs);

          preprocessor.addPPCallbacks(std::unique_ptr<clang::PPCallbacks>(macroPreprocessorCallbacks));

          return true;
      }

      return false;
    }

    void EndSourceFileAction() override
    {
      clang::PreprocessOnlyAction::EndSourceFileAction();
    }

private:
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    FilePathIndices &m_includeIds;
    FilePathCache<> &m_filePathCache;
    FilePathIndices &m_excludedIncludeUID;
    FilePathIndices &m_alreadyIncludedFileUIDs;
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};

} // namespace ClangBackEnd