dttogmt - convert DATE, TIME pair into operating system GMT time
#include
long dttogmt (d, t)
DATE d;
TIME t;
The function dttogmt converts an RMS DATE value and RMS TIME
value pair into the corresponding operating system GMT time
value. The operating system time value is the number of seconds
from 00:00:00 GMT, January 1, 1970.
The TIME parameter t is assumed to be in local time, not GMT
time.
atodate(C-3), atotime(C-3),
time(2)
DIAGNOSTICS
If the DATE parameter d is before 01/01/70, dttogmt returns a
value of -1.