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diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/src/HashFunction.hpp b/Build/source/texk/dvisvgm/dvisvgm-src/src/HashFunction.hpp
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--- a/Build/source/texk/dvisvgm/dvisvgm-src/src/HashFunction.hpp
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-/*************************************************************************
-** HashFunction.hpp **
-** **
-** This file is part of dvisvgm -- a fast DVI to SVG converter **
-** Copyright (C) 2005-2021 Martin Gieseking <martin.gieseking@uos.de> **
-** **
-** This program is free software; you can redistribute it and/or **
-** modify it under the terms of the GNU General Public License as **
-** published by the Free Software Foundation; either version 3 of **
-** the License, or (at your option) any later version. **
-** **
-** This program is distributed in the hope that it will be useful, but **
-** WITHOUT ANY WARRANTY; without even the implied warranty of **
-** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
-** GNU General Public License for more details. **
-** **
-** You should have received a copy of the GNU General Public License **
-** along with this program; if not, see <http://www.gnu.org/licenses/>. **
-*************************************************************************/
-
-#ifndef HASHFUNCTION_HPP
-#define HASHFUNCTION_HPP
-
-#include <istream>
-#include <memory>
-#include <string>
-#include <vector>
-
-/** Common base class for all hash functions. */
-class HashFunction {
- public:
- virtual ~HashFunction () =default;
- virtual int digestSize () const =0;
- virtual void reset () =0;
- virtual void update (const char *data, size_t length) =0;
- virtual void update (const std::string &data) =0;
- virtual void update (const std::vector<uint8_t> &data) =0;
- virtual std::vector<uint8_t> digestBytes () const =0;
- void update (std::istream &is);
- std::string digestString () const;
- static std::vector<std::string> supportedAlgorithms ();
- static bool isSupportedAlgorithm (const std::string &algo);
- static std::unique_ptr<HashFunction> create (const std::string &name);
- static std::unique_ptr<HashFunction> create (const std::string &name, const char *data, size_t length);
- static std::unique_ptr<HashFunction> create (const std::string &name, const std::string &data);
- static std::unique_ptr<HashFunction> create (const std::string &name, const std::vector<uint8_t> &data);
-};
-
-#endif