CTIME(III) 10/15/73 CTIME(III)
ctime - convert date and time to ASCII
double precision ctime
... = ctime(dummy)
Ctime converts a time in the vector tvec such as returned by
time (II) into ASCII and returns a pointer to a character
string in the form
Sun Sep 16 01:03:52 1973\n\0
All the fields have constant width.
Once the time has been placed into t and t+2, this routine
is callable from assembly language as follows:
and a pointer to the string is available in r0.
The localtime and gmtime entries return integer vectors to
the broken-down time. Localtime corrects for the time zone
and possible daylight savings time; gmtime converts directly
to GMT, which is the time UNIX uses. The value is a pointer
to an array whose components are
3 day of the month (1-31)
4 month (0-11)
5 year - 1900
6 day of the week (Sunday = 0)
7 day of the year (0-365)
8 Daylight Saving Time flag if non-zero
The external variable timezone contains the difference, in
seconds, between GMT and local standard time (in EST, is
5*60*60); the external variable daylight is non-zero iff the
standard U.S.A. Daylight Saving Time conversion should be
applied between the last Sundays in April and October. The
external variable nixonflg if non-zero supersedes daylight
and causes daylight time all year round.
A routine named ctime is also available from Fortran.
Actually it more resembles the time (II) system entry in
that it returns the number of seconds since the epoch 0000
GMT Jan. 1, 1970 (as a floating-point number).