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/* Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
*
* 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/>.
*/
/*!
* \file crc.h
*
* \author UFO
*
* \brief Dummy interface to CRC function of libz library. Should be removed
*
* \addtogroup common_lib
* @{
*/
#ifndef __CRC_H__
#define __CRC_H__
#include <zlib.h>
#include <stdint.h>
/**
* The type of the CRC values.
*
* This type must be big enough to contain at least 32 bits.
*****************************************************************************/
typedef uint32_t crc_t;
/**
* Calculate the initial crc value.
*
* \return The initial crc value.
*****************************************************************************/
static inline crc_t crc_init(void)
{
return adler32(0L, NULL, 0);
}
/**
* Update the crc value with new data.
*
* \param crc The current crc value.
* \param data Pointer to a buffer of \a data_len bytes.
* \param data_len Number of bytes in the \a data buffer.
* \return The updated crc value.
*****************************************************************************/
static inline crc_t crc_update(crc_t crc, const unsigned char *data, size_t data_len)
{
return adler32(crc, data, data_len);
}
/**
* Calculate the final crc value.
*
* \param crc The current crc value.
* \return The final crc value.
*****************************************************************************/
static inline crc_t crc_finalize(crc_t crc)
{
return crc;
}
#endif /* __CRC_H__ */
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