/* * copyright (c) 2006 Mans Rullgard * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVUTIL_ADLER32_H #define AVUTIL_ADLER32_H #include #include "attributes.h" /** * 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 */ unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf, unsigned int len) av_pure; #endif /* AVUTIL_ADLER32_H */