dyrt/
dyrt/bin/
dyrt/data/MAIL/
dyrt/data/WIZ_ZONES/
dyrt/include/machine/
dyrt/src/misc/cpp/
#include "kernel.h"
#include <sys/signal.h>
#include <time.h>
#include <sys/time.h>
#include <errno.h>
#include "stdinc.h"
#ifdef MIPS
# include "machine/mips.h"
#endif

#define  DAY_COUNT 60
#define  WEATHER_COUNT 27


#define  SECS_IN_A_MIN          60
#define  SECS_IN_AN_HOUR        (SECS_IN_A_MIN*60)
#define  SECS_IN_A_DAY          (SECS_IN_AN_HOUR*24)
#define  SECS_IN_A_WEEK         (SECS_IN_A_DAY*7)

#define  WARNING_1  15		/* Minutes before closing time to give warnings.  */
#define  WARNING_2   3		/* Only used if the mud is not open 24 hrs. a day */

/*
extern char *sys_errlist[];
*/
unsigned char day_count = DAY_COUNT;
unsigned char weather_count = WEATHER_COUNT;

#define NUM_INTERV 30

static int wrap = 0;		/* Number of times we wrap around */
int intervals = 0;
struct tm open_times[NUM_INTERV];

#define MUD_ALWAYS   0
#define MUD_OPEN     1
#define MUD_WARNING1 2
#define MUD_WARNING2 3
#define MUD_CLOSED   (-1)

int open_state = MUD_OPEN;
int wrap_point = -1;

/************************************************************************
 *                                                                      *
 *  "DIRT"'s system for controlling it's opening and closing times.     *
 *                                                                      *
 *  mud_open() is called. It reads DATA/hours and returns true if mud   *
 *  is open, false if not. Read DATA/=README= for the format. The       *
 *  opening time (if closed) or closing time (if open) is placed in     *
 *  the global variable 'next_event' and checked regularly. Two         *
 *  warnings are given before the players are kicked off at closing     *
 *  time.                                                               *
 ***********************************************************************/

time_t next_event;		/* closing time if open, opening time if closed. */


/* Return True if the time represented by a is later then that of b :
 * This procedure is to be used by the boot, where one and only one
 * interval may be later so one occurence should return true,
 * remaining false.
 * (We are only using the day, hour and min fields in tm.)
 */
static Boolean 
blater (struct tm *a, struct tm *b)
{
  
  if ((a->tm_wday > b->tm_wday)
      ||
      (a->tm_wday == b->tm_wday && a->tm_hour > b->tm_hour)
      ||
      ((a->tm_wday == b->tm_wday) && (a->tm_hour == b->tm_hour) &&
       (a->tm_min > b->tm_min)))
    return True;
  
  ++wrap;
  if (wrap_point >= 0)
    return False;
  
  wrap_point = a - open_times;
  
  return True;
}

/* Return True if the time represented by a is later then that of b :
 * (We are only using the day, hour and min fields in tm.)
 */
static Boolean 
later (struct tm *a, struct tm *b)
{
  
  if (a->tm_wday > b->tm_wday
      ||
      (a->tm_wday == b->tm_wday && a->tm_hour > b->tm_hour)
      ||
      (a->tm_wday == b->tm_wday && a->tm_hour == b->tm_hour &&
       a->tm_min > b->tm_min))
    return True;
  
  return False;
}


/* Return True if the time t occurs after a and before b, (between a and b).
 */
static Boolean 
between (struct tm *t, struct tm *a, struct tm *b)
{
  return (later (a, b) ? !between (t, b, a) : later (t, a) && !later (t, b));
}


/* Return the time difference between two events in seconds.
 */
static time_t 
diff (struct tm *from, struct tm *to)
{
  if (later (from, to))
    return (SECS_IN_A_WEEK - diff (to, from));
  else
    return ((to->tm_wday - from->tm_wday) * SECS_IN_A_DAY +
	    (to->tm_hour - from->tm_hour) * SECS_IN_AN_HOUR +
	    (to->tm_min - from->tm_min) * SECS_IN_A_MIN);
}


static int 
next_time (struct tm *now)
{
  struct tm *u;
  int x;
  
  for (x = 0, u = open_times; x < intervals; x++, u++)
    {
      if (later (u, now))
	break;
    }
  if (x == 0)
    {
      now->tm_wday += 7;
      for (x = 0, u = open_times; x < intervals; x++, u++)
	{
	  if (later (u, now))
	    break;
	}
      now->tm_wday -= 7;
    }
  if (x == intervals)
    x = 0;
  return x;
}

static Boolean 
ok_week_time (struct tm *t, char *d, char *fname, int lineno)
{
  static char *wdays[] =
    {"Sunday", "Monday", "Tuesday", "Wednesday",
       "Thursday", "Friday", "Saturday", TABLE_END};
  
  int x;
  
  if ((x = tlookup (d, wdays)) < 0)
    {
      printf ("%s:%d - No such day: %s\n", fname, lineno, d);
      return False;
    }
  t->tm_wday = x;
  if (t->tm_hour < 0 || t->tm_hour >= 24 || t->tm_min < 0 || t->tm_min >= 60)
    {
      printf ("%s:%d -  Illegal time: %d:%d\n",
	      fname, lineno, t->tm_hour, t->tm_min);
      return False;
    }
  return True;
}

static Boolean 
is_later (struct tm *b, struct tm *a,
	  char *fname, int lineno, int x)
{
  if (blater (b, a))
    return True;
  mudlog ("%s:%d - Illegal format %s \'->\', not increasing times.",
	  fname, lineno, (x == 0) ? "before" : "after");
  return False;
}

/* If AberMUD is open, return True and the closing-time in the variable
 * pointed to by next_ev (global UNIX time). If the game is closed,
 * return False, and the opening time in the variable pointed to by next_ev.
 */
Boolean 
mud_open (time_t * next_ev, time_t * current_time)
{
  struct tm *tm_now;
  int ct;
  time_t now = *current_time;
  
  now = round_to_min (now);
  tm_now = localtime (&now);
  
  if (intervals > 0)
    {
      ct = next_time (tm_now);
      *next_ev = now + diff (tm_now, open_times + ct);
      return ODD (ct);
    }
  else
    {
      *next_ev = TIME_NEVER;
      return True;
    }
}

static int 
xboot_times (FILE * f, char *fname)
{
  struct tm *i = open_times;
  FILE *fl;
  char dnamefrom[20];
  char dnameto[20];
  char b[256];
  int status, ct = 0, lineno = 0;
  
  
  if ((fl = f) == NULL && (fl = fopen (fname, "r")) == NULL)
    {
      intervals = 0;
      next_event = TIME_NEVER;
      open_state = MUD_ALWAYS;
      return 0;
    }
  while (fgets (b, sizeof b, fl))
    {
      lineno++;
      if (ct >= NUM_INTERV)
	{
	  printf ("%s:%d - Too many intervals in hours file.\n",
		  fname, lineno);
	  fclose (fl);
	  return -1;
	}
      status = sscanf (b, "%s %d:%d %*s %s %d:%d\n",
		       dnamefrom, &i->tm_hour, &i->tm_min,
		       dnameto, &i[1].tm_hour, &i[1].tm_min);
      if (status <= 0)
	continue;
      if (status != 6)
	{
	  fclose (fl);
	  printf ("status == %d\n", status);
	  printf ("%s:%d - Illegal format in hours file: %s", fname, lineno, b);
	  return -1;
	}
      
      if (!ok_week_time (i, dnamefrom, fname, lineno)
	  || ((ct > 0) && !is_later (i, i - 1, fname, lineno, 0))
	  || !ok_week_time (++i, dnameto, fname, lineno)
	  || !is_later (i, i - 1, fname, lineno, 1))
	{
	  fclose (fl);
	  
	  return -1;
	}
      ct += 2;
      ++i;
    }
  if (!is_later (open_times, i - 1, fname, 1, 0))
    {
      fclose (fl);
      return -1;
    }
  if (wrap != 1)
    {
      printf ("%s:%d - hours file should wrap once.\n", fname, lineno);
      fclose (fl);
      return -1;
    }
  if (!feof (fl))
    {
      printf ("%s:%d [%d]%s\n", fname, lineno, errno, sys_errlist[errno]);
      fclose (fl);
      return -1;
    }
  if (f == NULL)
    fclose (fl);
  intervals = ct;
  for (ct = wrap_point; ct < intervals; ct++)
    {
      open_times[ct].tm_wday += 7;
    }
  return 0;
}

int 
boot_hours (FILE * f, char *fname)
{
  int k;
  time_t now = time (NULL);
  
  if ((k = xboot_times (f, fname)) < 0)
    {
      intervals = 0;
      next_event = TIME_NEVER;
      open_state = MUD_ALWAYS;
    }
  else if (open_state == MUD_ALWAYS)
    return k;
  else if (mud_open (&next_event, &now))
    open_state = MUD_OPEN;
  else
    open_state = MUD_CLOSED;
  
  return k;
}


/* Check if closing time has arrived. If so, kick everyone off (except
 * the 'masteruser' if he is on). Give 2 warnings ahead of time.
 */
static void 
check_if_closed (time_t * now)
{
  int time_left;
  
  if (next_event == TIME_NEVER)
    return;
  
  time_left = next_event - *now;
  
  switch (open_state)
    {
    case MUD_ALWAYS:
      return;
    case MUD_OPEN:
      if (time_left < WARNING_1 * SECS_IN_A_MIN)
	{
	  bprintf ("  MUD is closing in %s.\a\n",
		   sec_to_str (round_to_min (time_left)));
	  open_state = MUD_WARNING1;
	}
      break;
    case MUD_WARNING1:
      if (time_left < WARNING_2 * SECS_IN_A_MIN)
	{
	  bprintf ("  MUD is closing in %s.\a\n",
		   sec_to_str (round_to_min (time_left)));
	  open_state = MUD_WARNING2;
	}
      break;
    case MUD_WARNING2:
      if (time_left < 0)
	{
#if 0
	  /*    remove all players from the game except operators */
#endif
	  broad ("\t\tMUD has closed. Thank you for playing...");
	  open_state = MUD_CLOSED;
	  if (mud_open (&next_event, now))
	    {
	      mudlog ("Internal error: mud_open is not False");
	    }
	}
      break;
    case MUD_CLOSED:
      if (time_left < 0)
	{
	  open_state = MUD_OPEN;
	  if (!mud_open (&next_event, now))
	    {
	      mudlog ("Internal error: mud_open is not True");
	    }
	}
    }
}


/* Return a pointer to a string containing the a date, without the \n
 * supplied by ctime(3). If the argument is 0, use the current local time.
 */
char *
time2ascii (time_t t)
{
  char *str;
  
  if (t == 0)
    t = global_clock;
  
  *strchr ((str = ctime (&t)), '\n') = '\0';
  
  return (t == TIME_UNAVAIL) ? "Not Available" : str;
}


/* The TIME command. List game time elapsed, current time, last reset
 * and closing time if applicable.
 */
void 
timecom (void)
{
  extern CALENDAR calendar;
  extern char *c_seasons[];
  extern char *c_day[];
  extern char *c_modifiers[];
  
  bprintf ("&+gMud time: It is %s%s %s.&*\n\n",
	   c_modifiers[calendar.modifier],
	   c_seasons[calendar.season],
	   c_day[calendar.daytime]);
  
  bprintf ("&+GTime since reset: ");
  eltime ();
  bprintf ("&+GCurrent Time    : %s&*\n", time2ascii (TIME_CURRENT));
  bprintf ("&+GLast Reset      : %s&+G", ctime (&last_reset));
  
  if (next_event != TIME_NEVER)
    {
      bprintf ("Closing Time : %s\n", time2ascii (next_event));
    }
}



/* Prints the game time elapsed. Called by timecom() and main.
 */
void 
eltime (void)
{
  long int et;
  
  switch (et = gametime ())
    {
    case TIME_NEVER:
      bprintf ("AberMUD has yet to ever start!");
      break;
    case TIME_UNAVAIL:
      bprintf ("Current time is unavailable!");
      break;
    default:
      if (et > SECS_IN_A_DAY)
	bprintf ("Over a day!");
      else
	bprintf ("%s", sec_to_str (et));
      break;
    }
  bprintf ("\n");
}


long int 
gametime (void)
{
  return global_clock - last_reset;
}
long int healalltime (void)
{
  return global_clock - last_healall;
}

/*  Takes a number of seconds as input and converts this to seconds,
 *  minutes, hours, days, which is returned if the pointers != NULL.
 */
static void 
split_time (long int sec, int *secs, int *min, int *hrs, int *days)
{
  int s = 0, m = 0, h = 0, d = 0;
  
  if (sec >= SECS_IN_A_DAY)
    {
      d = sec / SECS_IN_A_DAY;
      
      sec -= d * SECS_IN_A_DAY;
    }
  
  if (sec >= SECS_IN_AN_HOUR)
    {
      h = sec / SECS_IN_AN_HOUR;
      
      sec -= h * SECS_IN_AN_HOUR;
    }
  
  if (sec >= SECS_IN_A_MIN)
    {
      m = sec / SECS_IN_A_MIN;
      
      sec -= m * SECS_IN_A_MIN;
    }
  
  s = sec;
  
  /* Assign return values:
   */
  if (secs != NULL)
    *secs = s;
  if (min != NULL)
    *min = m;
  if (hrs != NULL)
    *hrs = h;
  if (days != NULL)
    *days = d;
}


/*  Takes a number of seconds as input and returns a pointer to a string
 *  containing the amount of time in english, ex: "2 hours, 3 minutes"..etc..
 */
char *
sec_to_str (long int seconds)
{
  static char str[50];
  
  int sec, min, hrs, days;
  
  char aux[15];
  
  *str = '\0';
  
  split_time (seconds, &sec, &min, &hrs, &days);
  
  if (days > 0)
    {
      sprintf (str, "%d day%s", days, (days == 1) ? "" : "s");
    }
  
  if (hrs > 0)
    {
      if (days > 0)
	strcat (str, ", ");
      sprintf (aux, "%d hour%s", hrs, (hrs == 1) ? "" : "s");
      strcat (str, aux);
    }
  
  if (min > 0)
    {
      if (days > 0 || hrs > 0)
	strcat (str, ", ");
      sprintf (aux, "%d minute%s", min, (min == 1) ? "" : "s");
      strcat (str, aux);
    }
  
  if (sec > 0)
    {
      if (days > 0 || hrs > 0 || min > 0)
	strcat (str, ", ");
      sprintf (aux, "%ld second%s", sec, (sec == 1) ? "" : "s");
      strcat (str, aux);
    }
  
  return (str);
}


/*  Takes a number of seconds as input and returns a pointer to a string
 *  containing hh:mm:ss.
 */
char *
sec_to_hhmmss (long int seconds)
{
  static char str[25];
  
  int sec, min, hrs, days;
  
  
  split_time (seconds, &sec, &min, &hrs, &days);
  
  if (days > 0)
    {
      hrs += days * 24;
    }
  
  if (hrs > 0)
    {
      sprintf (str, "%d:%02d:%02d", hrs, min, sec);
    }
  else if (min > 0)
    {
      sprintf (str, "%d:%02d", min, sec);
    }
  else
    {
      sprintf (str, "%d", sec);
    }
  
  return (str);
}


/* Returns time t rounded to the nearest minute.
 */
time_t 
round_to_min (time_t t)
{
  t += SECS_IN_A_MIN / 2;
  
  return (t -= t % SECS_IN_A_MIN);
}


/* Like ctime(3) but strips the seconds, year-part and the \n.
 */
char *
my_ctime (time_t * clock)
{
  char *t = ctime (clock);
  t[16] = '\0';
  return t;
}


void 
set_timer (void)
{
  alarm (TIMER_INTERRUPT);
}

void 
on_timer (void)
{
  static long int n = 0;
  static const int interupts_per_hour = 3600 / TIMER_INTERRUPT;
  
  if (++n % interupts_per_hour != 0 || time (&global_clock) == -1)
    {
      global_clock += TIMER_INTERRUPT;
    }
  
  check_if_closed (&global_clock);
  move_mobiles ();
  regenerate ();
  special_events (SP_ALL);
  
  day_count--;
  weather_count--;
  if (day_count == 0)
    {
      update_calendar ();
      day_count = DAY_COUNT;
    }
  if (weather_count == 0)
    {
      if (randperc () > WEATHER_COUNT)
	weather ();
      weather_count = WEATHER_COUNT;
    }
  compute_environment ();
}


#ifdef NEED_STRFTIME

/*
 * strftime.c
 *
 * Public-domain relatively quick-and-dirty implemenation of
 * ANSI library routine for System V Unix systems.
 *
 * It's written in old-style C for maximal portability.
 * However, since I'm used to prototypes, I've included them too.
 *
 * If you want stuff in the System V ascftime routine, add the SYSV_EXT define.
 *
 * The code for %c, %x, and %X is my best guess as to what's "appropriate".
 * This version ignores LOCALE information.
 * It also doesn't worry about multi-byte characters.
 * So there.
 *
 * Arnold Robbins
 * January, February, 1991
 *
 * Fixes from ado@elsie.nci.nih.gov
 * February 1991
 */

#include <stdio.h>
#include <string.h>
#include <time.h>
#include <sys/types.h>

#ifndef __STDC__
#define const	/**/
#endif

#ifndef __STDC__
extern void tzset();
extern char *strchr();
static int weeknumber();
#else
extern void tzset(void);
extern char *strchr(const char *str, int ch);
static int weeknumber(const struct tm *timeptr, int firstweekday);
#endif

extern char *tzname[2];
extern int daylight;

#define SYSV_EXT	1	/* stuff in System V ascftime routine */

/* strftime --- produce formatted time */

#ifndef __STDC__
size_t
strftime(s, maxsize, format, timeptr)
     char *s;
     size_t maxsize;
     const char *format;
     const struct tm *timeptr;
#else
     size_t
     strftime(char *s, size_t maxsize, const char *format, const struct tm *timeptr)
#endif
{
  char *endp = s + maxsize;
  char *start = s;
  char tbuf[100];
  int i;
  static short first = 1;
  
  /* various tables, useful in North America */
  static char *days_a[] = {
    "Sun", "Mon", "Tue", "Wed",
    "Thu", "Fri", "Sat",
  };
  static char *days_l[] = {
    "Sunday", "Monday", "Tuesday", "Wednesday",
    "Thursday", "Friday", "Saturday",
  };
  static char *months_a[] = {
    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
  };
  static char *months_l[] = {
    "January", "February", "March", "April",
    "May", "June", "July", "August", "September",
    "October", "November", "December",
  };
  static char *ampm[] = { "AM", "PM", };
  
  if (s == NULL || format == NULL || timeptr == NULL || maxsize == 0)
    return 0;
  
  if (strchr(format, '%') == NULL && strlen(format) + 1 >= maxsize)
    return 0;
  
  if (first) {
    tzset();
    first = 0;
  }
  
  for (; *format && s < endp - 1; format++) {
    tbuf[0] = '\0';
    if (*format != '%') {
      *s++ = *format;
      continue;
    }
    switch (*++format) {
    case '\0':
      *s++ = '%';
      goto out;
      
    case '%':
      *s++ = '%';
      continue;
      
    case 'a':	/* abbreviated weekday name */
      if (timeptr->tm_wday < 0 || timeptr->tm_wday > 6)
	strcpy(tbuf, "?");
      else
	strcpy(tbuf, days_a[timeptr->tm_wday]);
      break;
      
    case 'A':	/* full weekday name */
      if (timeptr->tm_wday < 0 || timeptr->tm_wday > 6)
	strcpy(tbuf, "?");
      else
	strcpy(tbuf, days_l[timeptr->tm_wday]);
      break;
      
    case 'h':	/* abbreviated month name */
    case 'b':	/* abbreviated month name */
      if (timeptr->tm_mon < 0 || timeptr->tm_mon > 11)
	strcpy(tbuf, "?");
      else
	strcpy(tbuf, months_a[timeptr->tm_mon]);
      break;
      
    case 'B':	/* full month name */
      if (timeptr->tm_mon < 0 || timeptr->tm_mon > 11)
	strcpy(tbuf, "?");
      else
	strcpy(tbuf, months_l[timeptr->tm_mon]);
      break;
      
    case 'c':	/* appropriate date and time representation */
      sprintf(tbuf, "%s %s %2d %02d:%02d:%02d %d",
	      days_a[timeptr->tm_wday],
	      months_a[timeptr->tm_mon],
	      timeptr->tm_mday,
	      timeptr->tm_hour,
	      timeptr->tm_min,
	      timeptr->tm_sec,
	      timeptr->tm_year + 1900);
      break;
      
    case 'd':	/* day of the month, 01 - 31 */
      sprintf(tbuf, "%02d", timeptr->tm_mday);
      break;
      
    case 'H':	/* hour, 24-hour clock, 00 - 23 */
      sprintf(tbuf, "%02d", timeptr->tm_hour);
      break;
      
    case 'I':	/* hour, 12-hour clock, 01 - 12 */
      i = timeptr->tm_hour;
      if (i == 0)
	i = 12;
      else if (i > 12)
	i -= 12;
      sprintf(tbuf, "%02d", i);
      break;
      
    case 'j':	/* day of the year, 001 - 366 */
      sprintf(tbuf, "%03d", timeptr->tm_yday + 1);
      break;
      
    case 'm':	/* month, 01 - 12 */
      sprintf(tbuf, "%02d", timeptr->tm_mon + 1);
      break;
      
    case 'M':	/* minute, 00 - 59 */
      sprintf(tbuf, "%02d", timeptr->tm_min);
      break;
      
    case 'p':	/* am or pm based on 12-hour clock */
      if (timeptr->tm_hour < 12)
	strcpy(tbuf, ampm[0]);
      else
	strcpy(tbuf, ampm[1]);
      break;
      
    case 'S':	/* second, 00 - 61 */
      sprintf(tbuf, "%02d", timeptr->tm_sec);
      break;
      
    case 'U':	/* week of year, Sunday is first day of week */
      sprintf(tbuf, "%d", weeknumber(timeptr, 0));
      break;
      
    case 'w':	/* weekday, Sunday == 0, 0 - 6 */
      sprintf(tbuf, "%d", timeptr->tm_wday);
      break;
      
    case 'W':	/* week of year, Monday is first day of week */
      sprintf(tbuf, "%d", weeknumber(timeptr, 1));
      break;
      
    case 'x':	/* appropriate date representation */
      sprintf(tbuf, "%s %s %2d %d",
	      days_a[timeptr->tm_wday],
	      months_a[timeptr->tm_mon],
	      timeptr->tm_mday,
	      timeptr->tm_year + 1900);
      break;
      
    case 'X':	/* appropriate time representation */
      sprintf(tbuf, "%02d:%02d:%02d",
	      timeptr->tm_hour,
	      timeptr->tm_min,
	      timeptr->tm_sec);
      break;
      
    case 'y':	/* year without a century, 00 - 99 */
      i = timeptr->tm_year % 100;
      sprintf(tbuf, "%d", i);
      break;
      
    case 'Y':	/* year with century */
      sprintf(tbuf, "%d", 1900 + timeptr->tm_year);
      break;
      
    case 'Z':	/* time zone name or abbrevation */
      i = 0;
      if (daylight && timeptr->tm_isdst)
	i = 1;
      strcpy(tbuf, tzname[i]);
      break;
      
    case 'n':	/* same as \n */
      tbuf[0] = '\n';
      tbuf[1] = '\0';
      break;
      
    case 't':	/* same as \t */
      tbuf[0] = '\t';
      tbuf[1] = '\0';
      break;
      
    case 'D':	/* date as %m/%d/%y */
      strftime(tbuf, sizeof tbuf, "%m/%d/%y", timeptr);
      break;
      
    case 'e':	/* day of month, blank padded */
      sprintf(tbuf, "%2d", timeptr->tm_mday);
      break;
      
    case 'r':	/* time as %I:%M:%S %p */
      strftime(tbuf, sizeof tbuf, "%I:%M:%S %p", timeptr);
      break;
      
    case 'R':	/* time as %H:%M */
      strftime(tbuf, sizeof tbuf, "%H:%M", timeptr);
      break;
      
    case 'T':	/* time as %H:%M:%S */
      strftime(tbuf, sizeof tbuf, "%H:%M:%S", timeptr);
      break;
      
    default:
      tbuf[0] = '%';
      tbuf[1] = *format;
      tbuf[2] = '\0';
      break;
    }
    i = strlen(tbuf);
    if (i)
      if (s + i < endp - 1) {
	strcpy(s, tbuf);
	s += i;
      } else
	return 0;
  }
 out:
  if (s < endp && *format == '\0') {
    *s = '\0';
    return (s - start);
  } else
    return 0;
}

/* weeknumber --- figure how many weeks into the year */

/* With thanks and tip of the hatlo to ado@elsie.nci.nih.gov */

static int
weeknumber(const struct tm *timeptr, int firstweekday)
{
  if (firstweekday == 0)
    return (timeptr->tm_yday + 7 - timeptr->tm_wday) / 7;
  else
    return (timeptr->tm_yday + 7 -
	    (timeptr->tm_wday ? (timeptr->tm_wday - 1) : 6)) / 7;
}

#endif /* need strftime */