sys/src/cmd/cwfs/time.c

   1 #include "all.h"
   2
   3 Timet
   4 toytime(void)
   5 {
   6         return time(nil);
   7 }
   8
   9 void
  10 datestr(char *s, Timet t)
  11 {
  12         Tm *tm;
  13
  14         tm = localtime(t);
  15         sprint(s, "%.4d%.2d%.2d", tm->year+1900, tm->mon+1, tm->mday);
  16 }
  17
  18 void
  19 prdate(void)
  20 {
  21         print("%T\n", time(nil));
  22 }
  23
  24 static void
  25 ct_numb(char *cp, int n)
  26 {
  27         if(n >= 10)
  28                 cp[0] = (n/10)%10 + '0';
  29         else
  30                 cp[0] = ' ';
  31         cp[1] = n%10 + '0';
  32 }
  33
  34 int
  35 Tfmt(Fmt* fmt)
  36 {
  37         char s[30];
  38         char *cp;
  39         Timet t;
  40         Tm *tm;
  41
  42         t = va_arg(fmt->args, Timet);
  43         if(t == 0)
  44                 return fmtstrcpy(fmt, "The Epoch");
  45
  46         tm = localtime(t);
  47         strcpy(s, "Day Mon 00 00:00:00 1900");
  48         cp = &"SunMonTueWedThuFriSat"[tm->wday*3];
  49         s[0] = cp[0];
  50         s[1] = cp[1];
  51         s[2] = cp[2];
  52         cp = &"JanFebMarAprMayJunJulAugSepOctNovDec"[tm->mon*3];
  53         s[4] = cp[0];
  54         s[5] = cp[1];
  55         s[6] = cp[2];
  56         ct_numb(s+8, tm->mday);
  57         ct_numb(s+11, tm->hour+100);
  58         ct_numb(s+14, tm->min+100);
  59         ct_numb(s+17, tm->sec+100);
  60         if(tm->year >= 100) {
  61                 s[20] = '2';
  62                 s[21] = '0';
  63         }
  64         ct_numb(s+22, tm->year+100);
  65
  66         return fmtstrcpy(fmt, s);
  67 }
  68
  69 /*
  70  * compute the next time after t
  71  * that has hour hr and is not on
  72  * day in bitpattern --
  73  * for automatic dumps
  74  */
  75 Timet
  76 nextime(Timet t, int hr, int day)
  77 {
  78         int nhr;
  79         Tm *tm;
  80
  81         if(hr < 0 || hr >= 24)
  82                 hr = 5;
  83         if((day&0x7f) == 0x7f)
  84                 day = 0;
  85         for (;;) {
  86                 tm = localtime(t);
  87                 t -= tm->sec;
  88                 t -= tm->min*60;
  89                 nhr = tm->hour;
  90                 do {
  91                         t += 60*60;
  92                         nhr++;
  93                 } while(nhr%24 != hr);
  94                 tm = localtime(t);
  95                 if(tm->hour != hr) {
  96                         t += 60*60;
  97                         tm = localtime(t);
  98                         if(tm->hour != hr) {
  99                                 t -= 60*60;
 100                                 tm = localtime(t);
 101                         }
 102                 }
 103                 if(day & (1<<tm->wday))
 104                         t += 12*60*60;
 105                 else
 106                         return t;
 107         }
 108 }
 109
 110 /*
 111  *  delay for l milliseconds more or less.
 112  */
 113 void
 114 delay(int l)
 115 {
 116         sleep(l);
 117 }