c - Compare 2 struct tm on multiplatform -


lets have 2 

struct tm

i need compare them in linux, in linux kernel , in windows. best way make cross-platform check?

by "compare" mean finding out date bigger. example - date @ moment , compare date of account expired.

you convert them mktime time_t , calculate difference difftime:

time_t t1 = mktime(tm1); time_t t2 = mktime(tm2); double diffsecs = difftime(t1, t2); // if positive, tm2 > tm1

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