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/*
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* copyright (c) 2006 Mans Rullgard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVUTIL_ADLER32_H
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#define AVUTIL_ADLER32_H
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#include <stdint.h>
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#include "attributes.h"
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/**
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* Calculate the Adler32 checksum of a buffer.
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*
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* Passing the return value to a subsequent av_adler32_update() call
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* allows the checksum of multiple buffers to be calculated as though
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* they were concatenated.
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*
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* @param adler initial checksum value
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* @param buf pointer to input buffer
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* @param len size of input buffer
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* @return updated checksum
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*/
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unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf,
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unsigned int len) av_pure;
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#endif /* AVUTIL_ADLER32_H */
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