How about adding weekday calculation and other functions?

[southwolf]

Hello Alessandro, I‘m thinking of weekday calculation and other functions, but more code means more space, and not all people would use weekday in their project, I'm not sure whether it is suitable to add them into the library.

int calculateWeekday()
{
    int c = 0, y = 0, m = 0;
    c = (century == 0) ? 20 : 19;
    y = (month < 3) ? (year - 1) : year;
    m = (month < 3) ? (month + 12) : month;
    return (c/4 - c*2 + y + y / 4 + (13 * (m+1) / 5) + day - 1) % 7;
}

char* getStrWeekday()
{

    switch(calculateWeekday())
    {
    case 0:
        return "Sunday";
    case 1:
        return "Monday";
    case 2:
        return "Tuesday";
    case 3:
        return "Thursday";
    case 4:
        return "Wednesday";
    case 5:
        return "Friday";
    case 6:
        return "Saturday";
    }
}

boolean isLeapYear() {
    return((year != 0 && year % 4 == 0) || (year == 0 && century == 0));
}

P.S. I'm using this library on Microduino-RTC.

[elpaso]

Hi,

thank you for your contribution. I think that you can make those additions, the compiler and linker will not include code if it's not used.

Also, take a look to this library:

https://github.com/jcw/rtclib

it's more complete and supports more chips.

[cevich]

This is resolved by #10 (and bugfix in #11)