collision.awk

#!/usr/bin/awk -f

BEGIN {
	FS = ",";
}

function update_array(ticket, full_array, partial_bytes_array)
{
	if (length(ticket) != 0)
	{
		partial_bytes_array[substr(ticket, 1, 16)]++;
		full_array[ticket]++;
	}	
}

function array_elem_num(array)
{
	elems_num = 0;
	for (ticket in array)
	{
		if (array[ticket] > 1)
		{
			elems_num++;
		}
	}
	return elems_num;
}

{
	update_array($3, session_ticket_full_array, session_ticket_partial_bytes_array);
	update_array($4, session_ticket_full_array, session_ticket_partial_bytes_array);
}

END {
	printf "Array element number (use full ticket): %d\n", array_elem_num(session_ticket_full_array);
	printf "Array element number (use first 8 bytes of ticket): %d\n", array_elem_num(session_ticket_partial_bytes_array);
}