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/*************************************************************************
** CRC32.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2018 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 CRC32_HPP
#define CRC32_HPP
#include <cstdlib>
#include <istream>
class CRC32 {
public:
CRC32 ();
CRC32 (const CRC32 &crc32) =delete;
void update (const uint8_t *bytes, size_t len);
void update (uint32_t n, int bytes=4);
void update (const char *str);
void update (std::istream &is);
uint32_t get () const;
void reset ();
static uint32_t compute (const uint8_t *bytes, size_t len);
static uint32_t compute (const char *str);
static uint32_t compute (std::istream &is);
private:
uint32_t _crc32;
uint32_t _tab[256];
};
#endif
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