bcd.h

Go to the documentation of this file.

/*
 * Copyright (C) 2017 Freie Universität Berlin
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#ifndef BCD_H
#define BCD_H
 
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
static inline uint8_t bcd_from_byte(uint8_t byte)
{
    /* ((byte / 10) << 4) | (byte % 10) */
    return byte + (6 * (byte / 10));
}
 
static inline uint8_t bcd_to_byte(uint8_t bcd)
{
    /* == (10 * (bcd >> 4)) + (bcd & 0xf) */
    return bcd - (6 * (bcd >> 4));
}
 
#ifdef __cplusplus
}
#endif
 
#endif /* BCD_H */