[linux-block.git] / include / linux / bcd.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCD_H
#define _BCD_H

#include <linux/compiler.h>

#define bcd2bin(x)					\
		(__builtin_constant_p((u8 )(x)) ?	\
		const_bcd2bin(x) :			\
		_bcd2bin(x))

#define bin2bcd(x)					\
		(__builtin_constant_p((u8 )(x)) ?	\
		const_bin2bcd(x) :			\
		_bin2bcd(x))

#define bcd_is_valid(x)					\
		const_bcd_is_valid(x)

#define const_bcd2bin(x)	(((x) & 0x0f) + ((x) >> 4) * 10)
#define const_bin2bcd(x)	((((x) / 10) << 4) + (x) % 10)
#define const_bcd_is_valid(x)	(((x) & 0x0f) < 10 && ((x) >> 4) < 10)

unsigned _bcd2bin(unsigned char val) __attribute_const__;
unsigned char _bin2bcd(unsigned val) __attribute_const__;

#endif /* _BCD_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _BCD_H
	3	#define _BCD_H
	4
d3de851a DB	5	#include <linux/compiler.h>
d3de851a DB	6
b53d657d SAS	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
19409796 AF	17	#define bcd_is_valid(x) \
	18	const_bcd_is_valid(x)
	19
b53d657d SAS	20	#define const_bcd2bin(x) (((x) & 0x0f) + ((x) >> 4) * 10)
b53d657d SAS	21	#define const_bin2bcd(x) ((((x) / 10) << 4) + (x) % 10)
19409796	22	#define const_bcd_is_valid(x) (((x) & 0x0f) < 10 && ((x) >> 4) < 10)
b53d657d SAS	23
	24	unsigned _bcd2bin(unsigned char val) __attribute_const__;
	25	unsigned char _bin2bcd(unsigned val) __attribute_const__;
d3de851a	26
1da177e4	27	#endif /* _BCD_H */