#define _GNU_SOURCE
#define _LARGEFILE_SOURCE
#define _LARGEFILE64_SOURCE
#define _FILE_OFFSET_BITS 64

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>

#define BUFSIZE (1024*1024)

char b[2][BUFSIZE] __attribute__((aligned(4096)));
long long ident=0,diff=0;

static inline void llformat(char * buf, long long v)
{
  int i;
  long long ti;
  if (v<0) {
    *(buf++)='-';
    v=-v;
  }
  for (i=ti=1;ti*10<=v;ti*=10,i++);
  while (i) {
    *(buf++)=(v/ti)+'0';
    v=v%ti;
    ti/=10;
    if (i%3==1) *(buf++)=' ';
    --i;
  }
  buf[-1]=0;
}

static inline void print()
{
  char b1[30],b2[30],b3[30];
  //  printf("\x0D%lld %lld %lld ",ident+diff,ident,diff);
  llformat(b1,ident+diff);
  llformat(b2,ident);
  llformat(b3,diff);
  printf("\x0D%s - %s - %s ",b1,b2,b3);
  fflush(stdout);
}

static inline void range(int n)
{
  int i;
  for (i=0;i<n;++i)
    if (b[0][i]==b[1][i])
      ++ident;
    else
      ++diff;
  print();
}

int main(int argc, char ** argv)
{
  int i;
  int fd[2];
  int r[2];

  if (argc!=3) {
    fprintf(stderr,"Usage: %s <file1> <file2>\n",argv[0]);
    return 1;
  }

  for (i=0;i<2;++i) {
    if (*argv[i+1])
      fd[i]=open(argv[i+1],O_RDONLY);
    else
      fd[i]=0;
    if (fd[i]==-1) {
      perror(argv[i+1]);
      return 1;
    }
  }

  while (1) {
    for (i=0;i<2;++i) {
      int rr;
      r[i]=0;
      do {
	int req=BUFSIZE-r[i];
	if(req>4096) req=4096;
	rr=read(fd[i],b[i]+r[i],req);
	if (rr==-1) {
	  perror(argv[i+1]);
	  return 1;
	}
	r[i]+=rr;
      } while ((rr)&&(r[i]<BUFSIZE));
    }
    if ((r[0]==BUFSIZE)&&
	(r[1]==BUFSIZE)) {
      if (memcmp(b[0],b[1],BUFSIZE)==0) {
	ident+=BUFSIZE;
	print();
      } else {
	range(BUFSIZE);
      }
    } else {
      range(r[r[1]<r[0]]);
      printf("\n");
      return 0;
    }
  }
}