/*-------------------------------------------------------------------------
RTC library

Written by Michael C. Miller.

I invest time and resources providing this open source code,
please support me by dontating (see https://github.com/Makuna/Rtc)

-------------------------------------------------------------------------
This file is part of the Makuna/Rtc library.

Rtc is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.

Rtc is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with Rtc.  If not, see
<http://www.gnu.org/licenses/>.
-------------------------------------------------------------------------*/

#include <Arduino.h>
#include "RtcUtility.h"

uint8_t BcdToUint8(uint8_t val)
{
    return val - 6 * (val >> 4);
}

uint8_t Uint8ToBcd(uint8_t val)
{
    return val + 6 * (val / 10);
}

uint8_t BcdToBin24Hour(uint8_t bcdHour)
{
    uint8_t hour;
    if (bcdHour & 0x40)
    {
        // 12 hour mode, convert to 24
        bool isPm = ((bcdHour & 0x20) != 0);

        hour = BcdToUint8(bcdHour & 0x1f);
        if (isPm)
        {
           hour += 12;
        }
    }
    else
    {
        hour = BcdToUint8(bcdHour);
    }
    return hour;
}