bcd.h

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/*
 * 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.
 */
 
#pragma once

 
#include <stdbool.h>
#include <stddef.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));
}

int bcd_buf_from_u32(uint32_t val, void *dst, size_t len);

uint32_t bcd_buf_to_u32(const void *src, size_t len);

uint64_t bcd_buf_to_u64(const void *src, size_t len);

int bcd_buf_from_str(const char *str, size_t str_len,
                     void *dst, size_t dst_len);
 
#ifdef __cplusplus
}
#endif