SkunkieButt's Blog

Cause I’m bored as fuck and I finished my FileTime function in Sys360, I will tell you how to get your TimeZone adjustment in native C++. Most people won’t really use this, but there’s no fkn function on the web that grabs the TimeZone adjustment or native function for this, and for people trying to make time related functions that deal with timezone… well here…

#include <time.h>
typedef unsigned char byte;
typedef unsigned long long ulong;
typedef long long i64;
static i64 tzSecs(void) {
    time_t t;
    tm *ptr;
    byte day;
    ulong num[2];
    t = time(NULL);
    ptr = gmtime(&t); // Standard UTC time
    // Get difference in seconds
    num[0] = (ptr->tm_hour * 3600) + (ptr->tm_min * 60);
    day = ptr->tm_mday;
    ptr = localtime(&t); // Local time w/ time zone
    num[1] = (ptr->tm_hour * 3600) + (ptr->tm_min * 60);
    // If not the same then get difference
    if (day == ptr->tm_mday) { // No date difference
        if (num[0] < num[1])
            return (num[1] – num[0]); // Positive ex. CUT +1
        else if (num[0] > num[1])
            return -(num[0] – num[1]); // Negative ex. Pacific -8
    }
    else if (day < ptr->tm_mday) // Ex. 1: 30 am Jan 1 : 11: 30 pm Dec 31
        return (86400 – num[0]) + num[1];
    else return -((86400 – num[1]) + num[0]); // Opposite
    return 0;
}

Believe it or not… It took me a few days to realize that MS’s [dumb] FileTime function was calculated by UTC 0 time and my function was 8 hours behind… I forgot about Time Zones v.v So this lil function set it right ^_^