how to convert datetime to unix timestamp in c?

Question

the scenario is: I get datetime in format \"YYYY-MM-DD HH:MM:SS\" with libexif. To minimize the saving cost, I wanna convert the datetime to unix timestamp or alike which on

Answer 1

Here is a wired solution in c/pseudo code I just hacked together. Good luck!

char * runner = NULL;
char *string_orig = "YYYY-MM-DD HH:MM:SS";
time_t time = 0;
struct tm tmp;

use strstr(string_orig, "-") and atoi foreach

  tmp->tm_year .. 
  tmp->tm_mon  .. 
  tmp->tm_mday ..  
  tmp->tm_hour  .. 
  tmp->tm_min  .. 
  tmp->tm_sec .. 

with *runner as help

time = mktime(&tm)