c('PL_get_int64')

Availability:C-language interface function

int PL_get_int64(term_t +t, int64_t *i)

If t is a Prolog integer or float that can be represented as a int64_t, assign its value over i. Currently all Prolog integers can be represented using this type, but this might change if SWI-Prolog introduces unbounded integers.