#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include "hardwaretimer.h"
#include "show.h"
#include "virtualtimers.h"
#define MILLION 1000000L

static double initialtod = 0.0;
static int maxtimers;
static double gettime(void);
static double timetodouble(long interval);

static double getrelativetime(void) {    /* seconds since showinit was called */
   return gettime() - initialtod;
}
 
static double gettime(void) {    /* seconds since January 1, 1970 as a double */
   double thistime = 0.0;
   struct timeval tval;
 
   if (gettimeofday(&tval, NULL))
      fprintf(stderr, "Failed to get time of day\n");
   else
      thistime = tval.tv_sec + (double)tval.tv_usec/MILLION;
   return thistime;
}

static void showtimerdata(void) {       /* display the timers data structure */
   int i;
 
   printf("(%d,%.3f) A:", getrunning(),
      timetodouble(getvalue(getrunning())));
   for (i = 0; i < maxtimers; i++)
      if (getvalue(i) >= 0)
         printf("(%d,%.3f) ", i, timetodouble(getvalue(i)));
   printf(" (%dE", getnumberevents());
   for (i = 0; i < getnumberevents(); i++)
      printf(" %d", getevent(i));
   printf(")\n");
}

static double timetodouble(long interval) {        /* microseconds to seconds */
   return (double)interval/MILLION;
}
 
/* ------------------------Public Functions --------------------------------- */
void show(int traceflag, const char *msg, long val1, long val2, 
             int blockedflag) {    /* displays timers with message for evtype */
   int wasblockedflag;
 
   if (!traceflag)
      return;
   wasblockedflag = blockinterrupt();
   printf("**** %8.4f: ", getrelativetime());
   printf("%s ",msg);
   if (val1 >= 0)
      printf("%ld ", val1);
   if (val2 >= 0)
      printf("%ld ", val2);
   if (blockedflag)
      printf("B");
   else
      printf("U");
   if (blockedflag != wasblockedflag)
      printf("***");
   showtimerdata();
   fflush(stdout);
   if (!wasblockedflag)
      unblockinterrupt();
}

void showinit(int maxt) {      /* set initialtod to seconds since Jan 1, 1970 */
   initialtod = gettime();
   maxtimers = maxt;    
}