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/kernel.h>
12
13#define ASCII85_BUFSZ 6
14
15static inline long
16ascii85_encode_len(long len)
17{
18	return DIV_ROUND_UP(len, 4);
19}
20
21static inline const char *
22ascii85_encode(u32 in, char *out)
23{
24	int i;
25
26	if (in == 0)
27		return "z";
28
29	out[5] = '\0';
30	for (i = 5; i--; ) {
31		out[i] = '!' + in % 85;
32		in /= 85;
33	}
34
35	return out;
36}
37
38#endif