CTIME(III) 10/15/73 CTIME(III)





CTIME(III)                  10/15/73                   CTIME(III)







NAME

     ctime  -  convert date and time to ASCII



SYNOPSIS

     char *ctime(tvec)

     int tvec[2];



     [from Fortran]

     double precision ctime

     ... = ctime(dummy)



     int *localtime(tvec)

     int tvec[2];



     int *gmtime(tvec)

     int tvec[2];



DESCRIPTION

     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:



             mov     $t,-(sp)

             jsr     pc,_ctime

             tst     (sp)+



     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



     0     seconds

     1     minutes

     2     hours

     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).



SEE ALSO

     time(II)



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