#include "exec/types.h"
#include "libraries/dos.h"

#define LEAPYEAR(year) (!((year)%4) && (year)%100)

void FormatDate(struct DateStamp *, char *);

void FormatDate(ds, string)
struct DateStamp *ds;
char *string;
{
   static char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
                            "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
   static int monthdays[] ={31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
   int day, month, year;
   ULONG hours, minutes, secs;

   for(year=78, day=ds->ds_Days; day >= 366; year++)
   {
      day -= 365;
      if(LEAPYEAR(year)) day--;  /* Leap day */
   }
   if(day == 365 && !LEAPYEAR(year))
   {
      day = 0;
      year++;
   }
   if(LEAPYEAR(year)) monthdays[1] = 29;
   else monthdays[1] = 28;

   for(month=0; 
       month<12 && day >= monthdays[month]; 
       day-=monthdays[month++]);

   day++;
   string[0] = '0' + day/10;
   string[1] = '0' + day%10;
   string[2] = string[6] = '-';
   memcpy(string+3, months[month], 3);
   string[7] = '0' + year/10;
   string[8] = '0' + year%10;
   string[9] = ' ';

   secs = ((ULONG)ds->ds_Tick/50) + 
          ((ULONG)ds->ds_Minute*60);

   hours   = secs / 3600;
   secs   %= 3600;
   minutes = secs / 60;
   secs %= 60;

   string[10] = '0' + hours/10;
   string[11] = '0' + hours%10;
   string[12] = string[15] = ':';
   string[13] = '0' + minutes/10;
   string[14] = '0' + minutes%10;
   string[16] = '0' + secs/10;
   string[17] = '0' + secs%10;
   string[18] = '\0';
   return;
}