bcd.h

 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
24unsigned _bcd2bin(unsigned char val) __attribute_const__;
25unsigned char _bin2bcd(unsigned val) __attribute_const__;
26
27#endif /* _BCD_H */