/* File........ spamfinder2.lex 
 * Contents....  SEG2106 - LAB-3 part 2 E-mail Search parser
Craig Campbell - 50111
Paul M. Baillot 2273596

 */

/* compilation: 
 *    flex parser3.lex 
 *    gcc -o parser3.exe lexyy.c
 */


/* ---------------- Definitions space ----------------- */
%option noyywrap
%{
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

  int address = 0;
%}

SUBJECT		[0-9a-zA-Z]+([\.]{0,1}[0-9a-zA-Z]+)*
AT		[@]
NAMEADDRESS	[a-zA-Z]+[0-9a-zA-Z]*([\.]{0,1}([a-zA-Z]+[0-9a-zA-Z]*))*
IPADDRESS	[0-9]{1,3}([\.]{1}[0-9]{1,3}){3}
EMAIL		{SUBJECT}{AT}{1,1}({NAMEADDRESS}|{IPADDRESS})

			DIGIT          [0-9]+
			STUDENT_ID     [u|s]{DIGIT}{6,7}

/* ------------------- Rules space -------------------- */
%%
{EMAIL}   { ++address; printf( " the match was a valid e-mail address %s \n",yytext); } 
\n             { }
.              { }
%%

/* ----------------- User code space ------------------ */
main()
{
  printf("Hit ^Z followed by enter to finish\n");
  yylex();
  printf("--- The total number of valid Addresses is = : %d\n", address);

}