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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_ZUCCHINI_HEURISTIC_ENSEMBLE_MATCHER_H_
#define COMPONENTS_ZUCCHINI_HEURISTIC_ENSEMBLE_MATCHER_H_
#include <ostream>
#include "components/zucchini/buffer_view.h"
#include "components/zucchini/ensemble_matcher.h"
namespace zucchini {
// An ensemble matcher that:
// - Detects embedded elements in "old" and "new" archive files.
// - Applies heuristics to create matched pairs.
// It is desired to have matched pairs that:
// - Have "reasonable" size difference (see UnsafeDifference() in the .cc file).
// - Have "minimal distance" among other potential matched pairs.
class HeuristicEnsembleMatcher : public EnsembleMatcher {
public:
explicit HeuristicEnsembleMatcher(std::ostream* out);
HeuristicEnsembleMatcher(const HeuristicEnsembleMatcher&) = delete;
const HeuristicEnsembleMatcher& operator=(const HeuristicEnsembleMatcher&) =
delete;
~HeuristicEnsembleMatcher() override;
// EnsembleMatcher:
bool RunMatch(ConstBufferView old_image, ConstBufferView new_image) override;
private:
// Optional stream to print detailed information during matching.
std::ostream* out_ = nullptr;
};
} // namespace zucchini
#endif // COMPONENTS_ZUCCHINI_HEURISTIC_ENSEMBLE_MATCHER_H_
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