timeinfo.c

   1 #include <assert.h>
   2 #include <ctype.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <math.h>
   6 #include <time.h>
   7
   8 #define DEBUG
   9
  10 #include "debug.h"
  11 #include "timeinfo.h"
  12
  13
  14 bool
  15 time_parse(struct time_info *ti, char *s)
  16 {
  17         switch (s[0]) {
  18                 case '_': ti->period = TT_TOTAL; s++; break;
  19                 default: ti->period = TT_MOVE; break;
  20         }
  21         switch (s[0]) {
  22                 case '=':
  23                         ti->dim = TD_GAMES;
  24                         ti->len.games = atoi(++s);
  25                         break;
  26                 default:
  27                         if (!isdigit(s[0]))
  28                                 return false;
  29                         ti->dim = TD_WALLTIME;
  30                         ti->len.t.recommended_time = atof(s);
  31                         break;
  32         }
  33         return true;
  34 }
  35
  36 /* Returns the current time. */
  37 double
  38 time_now(void)
  39 {
  40         struct timespec now;
  41         clock_gettime(CLOCK_REALTIME, &now);
  42         return now.tv_sec + now.tv_nsec/1000000000.0;
  43 }
  44
  45 /* Sleep for a given interval (in seconds). Return immediately if interval < 0. */
  46 void
  47 time_sleep(double interval)
  48 {
  49         struct timespec ts;
  50         double sec;
  51         ts.tv_nsec = (int)(modf(interval, &sec)*1000000000.0);
  52         ts.tv_sec = (int)sec;
  53         nanosleep(&ts, NULL); /* ignore error if interval was < 0 */
  54 }