timeval_subtract()

This is a convenience function used by test_import_export_context().

Example A–16 timeval_subtract()

static float timeval_subtract(tv1, tv2)
        struct timeval *tv1, *tv2;
{
        return ((tv1->tv_sec - tv2->tv_sec) +
                ((float) (tv1->tv_usec - tv2->tv_usec)) / 1000000);
}