1                 : 
       2                 : /* $selId: dow.c,v 2.0 1995/10/24 01:13:06 lees Exp $
       3                 :  * Copyright 1993-1995, Scott E. Lee, all rights reserved.
       4                 :  * Permission granted to use, copy, modify, distribute and sell so long as
       5                 :  * the above copyright and this permission statement are retained in all
       6                 :  * copies.  THERE IS NO WARRANTY - USE AT YOUR OWN RISK.
       7                 :  */
       8                 : 
       9                 : /**************************************************************************
      10                 :  *
      11                 :  * These are the externally visible components of this file:
      12                 :  *
      13                 :  *     int
      14                 :  *     DayOfWeek(
      15                 :  *         long int sdn);
      16                 :  *
      17                 :  * Convert a SDN to a day-of-week number (0 to 6).  Where 0 stands for
      18                 :  * Sunday, 1 for Monday, etc. and 6 stands for Saturday.
      19                 :  *
      20                 :  *     char *DayNameShort[7];
      21                 :  *
      22                 :  * Convert a day-of-week number (0 to 6), as returned from DayOfWeek(), to
      23                 :  * the abbreviated (three character) name of the day.
      24                 :  *
      25                 :  *     char *DayNameLong[7];
      26                 :  *
      27                 :  * Convert a day-of-week number (0 to 6), as returned from DayOfWeek(), to
      28                 :  * the name of the day.
      29                 :  *
      30                 :  **************************************************************************/
      31                 : 
      32                 : #include "sdncal.h"
      33                 : 
      34                 : int DayOfWeek(
      35                 :                                  long int sdn)
      36             100 : {
      37                 :         int dow;
      38                 : 
      39             100 :         dow = (sdn + 1) % 7;
      40             100 :         if (dow >= 0) {
      41              79 :                 return (dow);
      42                 :         } else {
      43              21 :                 return (dow + 7);
      44                 :         }
      45                 : }
      46                 : 
      47                 : char *DayNameShort[7] =
      48                 : {
      49                 :         "Sun",
      50                 :         "Mon",
      51                 :         "Tue",
      52                 :         "Wed",
      53                 :         "Thu",
      54                 :         "Fri",
      55                 :         "Sat"
      56                 : };
      57                 : 
      58                 : char *DayNameLong[7] =
      59                 : {
      60                 :         "Sunday",
      61                 :         "Monday",
      62                 :         "Tuesday",
      63                 :         "Wednesday",
      64                 :         "Thursday",
      65                 :         "Friday",
      66                 :         "Saturday"
      67                 : };
      68                 : 
      69                 : /*
      70                 :  * Local variables:
      71                 :  * tab-width: 4
      72                 :  * c-basic-offset: 4
      73                 :  * End:
      74                 :  * vim600: sw=4 ts=4 fdm=marker
      75                 :  * vim<600: sw=4 ts=4
      76                 :  */