date.c

   1
   2 /*
   3  * manipulate date types
   4  *
   5  * $Header: date.c 1.4 92/12/07 $
   6  * $Log:        date.c,v $
   7  * Revision 1.4  92/12/07  17:17:47  duplain
   8  * reformatted source.
   9  *
  10  * Revision 1.3  92/11/06  12:43:06  duplain
  11  * Removed check for "time-stamped header" in makedate().
  12  *
  13  * Revision 1.2  92/10/06  12:12:10  duplain
  14  * Fixed makedate().
  15  *
  16  * Revision 1.1  92/09/29  18:02:17  duplain
  17  * Initial revision
  18  *
  19  */
  20
  21 #include <stdio.h>
  22 #include "spark.h"
  23
  24 static char *monthnames[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  25         "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
  26 };
  27
  28 /*
  29  * Build date structure from load and exec fields
  30  */
  31 Date *
  32 makedate(Header *header)
  33 {
  34         static Date date;
  35         register Halfword arcdate = header->date;
  36         register Halfword arctime = header->time;
  37
  38         date.second = (arctime & 0x1f) * 2;
  39         date.minute = (arctime >> 5) & 0x3f;
  40         date.hour = (arctime >> 11) & 0x1f;
  41         date.day = arcdate & 0x1f;
  42         date.month = (arcdate >> 5) & 0x0f;
  43         date.year = ((arcdate >> 9) & 0x7f) + 80;
  44         return (&date);
  45 }
  46
  47 char *
  48 monthname(int month)
  49 {
  50         if (month > 0 && month < 13)
  51                 return (monthnames[month - 1]);
  52         else
  53                 return ("XXX");
  54 }