FFmpeg 5.1.6
adler32.h
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1/*
2 * copyright (c) 2006 Mans Rullgard
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21/**
22 * @file
23 * @ingroup lavu_adler32
24 * Public header for Adler-32 hash function implementation.
25 */
26
27#ifndef AVUTIL_ADLER32_H
28#define AVUTIL_ADLER32_H
29
30#include <stddef.h>
31#include <stdint.h>
32#include "attributes.h"
33
34/**
35 * @defgroup lavu_adler32 Adler-32
36 * @ingroup lavu_hash
37 * Adler-32 hash function implementation.
38 *
39 * @{
40 */
41
42typedef uint32_t AVAdler;
43
44/**
45 * Calculate the Adler32 checksum of a buffer.
46 *
47 * Passing the return value to a subsequent av_adler32_update() call
48 * allows the checksum of multiple buffers to be calculated as though
49 * they were concatenated.
50 *
51 * @param adler initial checksum value
52 * @param buf pointer to input buffer
53 * @param len size of input buffer
54 * @return updated checksum
55 */
56AVAdler av_adler32_update(AVAdler adler, const uint8_t *buf,
57 size_t len) av_pure;
58
59/**
60 * @}
61 */
62
63#endif /* AVUTIL_ADLER32_H */
Macro definitions for various function/variable attributes.
#define av_pure
Definition: attributes.h:76
uint32_t AVAdler
Definition: adler32.h:42
AVAdler av_adler32_update(AVAdler adler, const uint8_t *buf, size_t len) av_pure
Calculate the Adler32 checksum of a buffer.