1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _BCD_H |
3 | #define _BCD_H |
4 | |
5 | #include <linux/compiler.h> |
6 | |
7 | #define bcd2bin(x) \ |
8 | (__builtin_constant_p((u8 )(x)) ? \ |
9 | const_bcd2bin(x) : \ |
10 | _bcd2bin(x)) |
11 | |
12 | #define bin2bcd(x) \ |
13 | (__builtin_constant_p((u8 )(x)) ? \ |
14 | const_bin2bcd(x) : \ |
15 | _bin2bcd(x)) |
16 | |
17 | #define bcd_is_valid(x) \ |
18 | const_bcd_is_valid(x) |
19 | |
20 | #define const_bcd2bin(x) (((x) & 0x0f) + ((x) >> 4) * 10) |
21 | #define const_bin2bcd(x) ((((x) / 10) << 4) + (x) % 10) |
22 | #define const_bcd_is_valid(x) (((x) & 0x0f) < 10 && ((x) >> 4) < 10) |
23 | |
24 | unsigned _bcd2bin(unsigned char val) __attribute_const__; |
25 | unsigned char _bin2bcd(unsigned val) __attribute_const__; |
26 | |
27 | #endif /* _BCD_H */ |
28 | |