| Jordan Crouse | 489cae6 | 2018-07-24 10:33:19 -0600 | [diff] [blame] | 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 | |
| 15 | static inline long |
| 16 | ascii85_encode_len(long len) |
| 17 | { |
| 18 | return DIV_ROUND_UP(len, 4); |
| 19 | } |
| 20 | |
| 21 | static inline const char * |
| 22 | ascii85_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 |