/*
File: woof5.l
In this version, C code is reformatted to be easier to read.
*/

%option noyywrap

%{
#include <stdio.h>
#include <stdlib.h>

typedef char* YYSTYPE ;

YYSTYPE yylval ;

#define END 0
#define HEARD 1
#define NEWLINE 2
#define IGNORED 3

%}

%%

<<EOF>> { 
   sprintf(yylval, "\nWoof! are we done talking?\n"); 
   return END; 
}

treat { 
   sprintf(yylval, "\n!!!%s!!! Woof! yummy!\n", yytext); 
   return HEARD;
}

walk { 
   sprintf(yylval, "\n!!!%s!!! Woof! where's the leash?\n", yytext); 
   return HEARD; 
}

dinner { 
   sprintf(yylval, "\n!!!%s!!! Woof! I'm hungry!\n", yytext); 
   return HEARD; 
}

good\ dog { 
   sprintf(yylval, "\n!!!%s!!! Woof! talking about me!\n", yytext); 
   return HEARD;
}

\n { 
   yylval[0] = '\0' ;
   return NEWLINE; 
}

. { 
   yylval[0] = '\0' ;
   return IGNORED; 
}

%%

int main(int argc, char **argv) {
   int r ;

   yylval = (char *) malloc(10000) ;
  
   while ( r = yylex() ) {
      switch (r) {

      case HEARD :
         printf("%s", yylval) ;
         printf("== pat, pat, nice doggy == \n") ;
         break ;

      case NEWLINE :
         printf("\n") ;
         break ;

      case IGNORED :
         printf(".") ;
         break ;

      default :
         fprintf(stderr, "Oops! that wasn't supposed to happen!\n") ;

      }  // end of switch

   }  // end of while
  
   printf("%s", yylval) ;
   free(yylval) ;
   return 0 ;
}