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
16 static inline long
17 ascii85_encode_len(long len)
18 {
19 return DIV_ROUND_UP(len, 4);
20 }
21
22 static inline const char *
23 ascii85_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
40
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