yading@11: /*
yading@11:  * copyright (c) 2006 Mans Rullgard
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #ifndef AVUTIL_ADLER32_H
yading@11: #define AVUTIL_ADLER32_H
yading@11: 
yading@11: #include <stdint.h>
yading@11: #include "attributes.h"
yading@11: 
yading@11: /**
yading@11:  * @ingroup lavu_crypto
yading@11:  * Calculate the Adler32 checksum of a buffer.
yading@11:  *
yading@11:  * Passing the return value to a subsequent av_adler32_update() call
yading@11:  * allows the checksum of multiple buffers to be calculated as though
yading@11:  * they were concatenated.
yading@11:  *
yading@11:  * @param adler initial checksum value
yading@11:  * @param buf   pointer to input buffer
yading@11:  * @param len   size of input buffer
yading@11:  * @return      updated checksum
yading@11:  */
yading@11: unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf,
yading@11:                                 unsigned int len) av_pure;
yading@11: 
yading@11: #endif /* AVUTIL_ADLER32_H */