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





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







NAME

     ctime, localtime, gmtime  -  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.



     The localtime and gmtime entries return pointers to  integer

     vectors containing 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 Savings Time conversion should be

     applied.  The program knows about the peculiarities of  this

     conversion in 1974 and 1975; if necessary, a table for these

     years can be extended.



     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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