void indirezione(int livello, int salto){
	int tmp2[256],m=0,prev,i,j;
	unsigned char test[sb.s_log_block_size];
	if(!livello){
	  for(i=0;i<15;i++) {
	    if(i<12){ 
	      if(inode.i_block[i] != 0){
		if(inode.i_block[i+1] != 0){
		  if(inode.i_block[i]+1!=inode.i_block[i+1])
		    discont++;
		  }
		}
		else
		  break;
	      }	 	
	      else{
		if(i==12)
		  indirezione(1,inode.i_block[i]); 
	      else if(i==13)
		  indirezione(2,inode.i_block[i]);
	      else if(i==14)
		  indirezione(3,inode.i_block[i]);	
	    }
	  }
	}
	else if(livello==1){
	  lseek(fd,salto*sb.s_log_block_size,0);
	  read(fd,&test,sizeof(test));
	  prev=test[0] + (test[1] << 8) + (test[2] << 16) + (test[3] <<24);
	  m=4;
	  for(j=1;j<256;j++){
	    tmp2[j]= test[m] + (test[m+1] << 8) + (test[m+2] << 16) + (test[m+3] <<24);
	    if(tmp2[j]==0)
	      break;
	    else{
	      if(prev+1!=tmp2[j]){
		discont++;
	      }
	      prev=tmp2[j];
	      m+=4;
	    }
	   }
	 }
	 else if(livello==2){
	   m=0;
	   lseek(fd,salto*sb.s_log_block_size,0);
	   read(fd,&test,sizeof(test));
	   for(j=0;j<256;j++){
	     tmp2[j]= test[m] + (test[m+1] << 8) + (test[m+2] << 16) + (test[m+3] <<24);
	     if(tmp2[j]==0)
	       break;
	     indirezione(1,tmp2[j]);
	     m+=4;
	   }
	 }
	 else if(livello==3){
	    m=0;
	    lseek(fd,salto*sb.s_log_block_size,0);
	    read(fd,&test,sizeof(test));
	    for(j=0;j<256;j++){
	      tmp2[j]= test[m] + (test[m+1] << 8) + (test[m+2] << 16) + (test[m+3] <<24);
	      if(tmp2[j]==0)
	        break;
	      indirezione(2,tmp2[j]);
	      m+=4;
	     }
	 }
}