/*
* copyright ( c ) 2006 Mans Rullgard
*
* This file is part of FFmpeg .
*
* FFmpeg is free software ; you can redistribute it and / or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation ; either
* version 2 . 1 of the License , or ( at your option ) any later version .
*
* FFmpeg 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
* Lesser General Public License for more details .
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg ; if not , write to the Free Software
* Foundation , Inc . , 51 Franklin Street , Fifth Floor , Boston , MA 02110 - 1301 USA
*/
/**
* @ file
* @ ingroup lavu_adler32
* Public header for Adler - 32 hash function implementation .
*/
#ifndef AVUTIL_ADLER32_H
#define AVUTIL_ADLER32_H
#include <stddef.h>
#include <stdint.h>
#include "attributes.h"
/**
* @ defgroup lavu_adler32 Adler - 32
* @ ingroup lavu_hash
* Adler - 32 hash function implementation .
*
* @ {
*/
typedef uint32_t AVAdler;
/**
* Calculate the Adler32 checksum of a buffer .
*
* Passing the return value to a subsequent av_adler32_update ( ) call
* allows the checksum of multiple buffers to be calculated as though
* they were concatenated .
*
* @ param adler initial checksum value
* @ param buf pointer to input buffer
* @ param len size of input buffer
* @ return updated checksum
*/
AVAdler av_adler32_update(AVAdler adler, const uint8_t *buf,
size_t len) av_pure;
/**
* @ }
*/
#endif /* AVUTIL_ADLER32_H */
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