Implement TimeToDateTime for Symbian

[eafton]

This replaces the stub with a proper implementation

Fixes #14047

[eafton]

It finally works! Ready to merge...

[mupfdev]

I'm not getting the proper time and date. Tried EKA2L1 and on real hardware with similar results.

1970-02-02 00:00:00.000 (UTC offset: 8 minutes)

Not sure (yet) why.

[mupfdev]

This should do the trick:

#define SYMBIAN_UNIX_EPOCH_OFFSET_US 62135596800000000LL

bool SDL_TimeToDateTime(SDL_Time ticks, SDL_DateTime *dt, bool localTime)
{
    CHECK_PARAM(!dt)
    {
        return SDL_InvalidParamError("dt");
    }

    long long unixMicros = ticks / 1000LL;

    unixMicros += SYMBIAN_UNIX_EPOCH_OFFSET_US;

    TInt32 high = (TInt32)(unixMicros >> 32);
    TUint32 low = (TUint32)(unixMicros & 0xFFFFFFFFu);
    TInt64 symbianTime(high, low);

    TTime s60Time(symbianTime);

    if (localTime) {
        s60Time.HomeTime();
    }

    TDateTime dtSym = s60Time.DateTime();

    dt->year = dtSym.Year();
    dt->month = dtSym.Month() + 1; // Months are 0-11
    dt->day = dtSym.Day() + 1;     // Days are 0-30
    dt->hour = dtSym.Hour();
    dt->minute = dtSym.Minute();
    dt->second = dtSym.Second();
    dt->nanosecond = (int)(ticks % 1000000000LL);
    dt->day_of_week = s60Time.DayNoInWeek();
    dt->utc_offset = 0;

    return true;
}

[sezero]

This should do the trick:

If it's tested enough, can you push that so that we can close this PR and the associated issue ticket?

[eafton]

This should do the trick:

#define SYMBIAN_UNIX_EPOCH_OFFSET_US 62135596800000000LL

bool SDL_TimeToDateTime(SDL_Time ticks, SDL_DateTime *dt, bool localTime)
{
    CHECK_PARAM(!dt)
    {
        return SDL_InvalidParamError("dt");
    }

    long long unixMicros = ticks / 1000LL;

    unixMicros += SYMBIAN_UNIX_EPOCH_OFFSET_US;

    TInt32 high = (TInt32)(unixMicros >> 32);
    TUint32 low = (TUint32)(unixMicros & 0xFFFFFFFFu);
    TInt64 symbianTime(high, low);

    TTime s60Time(symbianTime);

    if (localTime) {
        s60Time.HomeTime();
    }

    TDateTime dtSym = s60Time.DateTime();

    dt->year = dtSym.Year();
    dt->month = dtSym.Month() + 1; // Months are 0-11
    dt->day = dtSym.Day() + 1;     // Days are 0-30
    dt->hour = dtSym.Hour();
    dt->minute = dtSym.Minute();
    dt->second = dtSym.Second();
    dt->nanosecond = (int)(ticks % 1000000000LL);
    dt->day_of_week = s60Time.DayNoInWeek();
    dt->utc_offset = 0;

    return true;
}

I am closing this PR then, you can open one.