/* * difftime - compute the difference between two calendar times */ /* $Header: difftime.c,v 1.4 90/09/11 10:18:44 eck Exp $ */ #include <time.h> double difftime(time_t time1, time_t time0) { /* be careful: time_t may be unsigned */ if ((time_t)-1 > 0 && time0 > time1) { return - (double) (time0 - time1); } else { return (double)(time1 - time0); } }