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#include <stdio.h>
#include <stdlib.h>
#include "types.h"
#include <trace.h>
#include "util.h"

/* distribuzione dei tempi di attesa sulle richieste al disco */

#define MAXX 37000
#define PREC 37000
#define DELTA ((double)MAXX/(double)PREC)

#include "distr.c"

int task;
long a=-1;

int waitfunc(trc_event_t *ev)
{
  if (event_class(ev->event)!=TRC_CLASS_USER) return 0;
  if (ev->x.usr.n!=task) return 0;
  if (ev->event==TRC_USER1) {
    a=ev->time;
    return 0;
  }
  if (ev->event==TRC_USER2) {
    if (a!=-1) d_insert(ev->time-a);
    a=-1;
  }
  return 0;
}

int main(int argc, char *argv[])
{
  FILE *fout;
  int res;  
  if (argc!=4) {
    fprintf(stderr,"missing filename!\n");
    return -1;
  }
  d_init();
  task=atoi(argv[2]);
  res=read_trace(argv[1],waitfunc);
  if (res==0) {
    fout=fopen(argv[3],"wt");
    if (fout!=NULL) {
      d_dump(fout);
      fclose(fout);
    } else
      fprintf(stderr,"can't create output file!\n");
  } else
    fprintf(stderr,"read_trace error\n");
 
  return 0;
}