ascii85.h

 1/*
 2 * SPDX-License-Identifier: GPL-2.0
 3 *
 4 * Copyright (c) 2008 Intel Corporation
 5 * Copyright (c) 2018 The Linux Foundation. All rights reserved.
 6 */
 7
 8#ifndef _ASCII85_H_
 9#define _ASCII85_H_
10
11#include <linux/math.h>
12#include <linux/types.h>
13
14#define ASCII85_BUFSZ 6
15
16static inline long
17ascii85_encode_len(long len)
18{
19	return DIV_ROUND_UP(len, 4);
20}
21
22static inline const char *
23ascii85_encode(u32 in, char *out)
24{
25	int i;
26
27	if (in == 0)
28		return "z";
29
30	out[5] = '\0';
31	for (i = 5; i--; ) {
32		out[i] = '!' + in % 85;
33		in /= 85;
34	}
35
36	return out;
37}
38
39#endif