POC to expose issue on parseDVBdate Enigma2 under aarch64

test_mjd.cpp

#include <stdio.h>
#include <ctime>

static void parseDVBdate(tm &t, int mjd)
{
	int k;

	printf("[eDVBLocalTimerHandler] parseDVBdate, mjd is %d\n", mjd);

	t.tm_year = (int) ((mjd - 15078.2) / 365.25);
	t.tm_mon = (int) ((mjd - 14956.1 - (int)(t.tm_year * 365.25)) / 30.6001);
	t.tm_mday = (int) (mjd - 14956 - (int)(t.tm_year * 365.25) - (int)(t.tm_mon * 30.6001));
	k = (t.tm_mon == 14 || t.tm_mon == 15) ? 1 : 0;
	t.tm_year = t.tm_year + k;
	t.tm_mon = t.tm_mon - 1 - k * 12;
	t.tm_mon--;

	printf("[eDVBLocalTimerHandler] parseDVBdate is %d:%d:%d\n", t.tm_year, t.tm_mon, t.tm_mday);

	t.tm_isdst =  0;
	t.tm_gmtoff = 0;
}

time_t parseDVBtime1(int mjd)
{
	tm t;
	parseDVBdate(t, mjd);
	return timegm(&t);
}

time_t parseDVBtime2(int mjd)
{
	tm t = {0};
	parseDVBdate(t, mjd);
	return timegm(&t);
}

int main()
{
	std::time_t now = parseDVBtime1(12792);
	char buffer[32];
	std::strftime(buffer, 32, "%a, %d.%m.%Y %H:%M:%S", std::localtime(&now));
	printf("parseDVBtime1 %s\n", buffer);

	now = parseDVBtime2(12792);
	std::strftime(buffer, 32, "%a, %d.%m.%Y %H:%M:%S", std::localtime(&now));
	printf("parseDVBtime2 %s\n", buffer);
	
	return 0;
}