/* route_sim.l by Brett Tjaden */

%{

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "route_sim.tab.h++"

#define YY_SKIP_YYWRAP 1
int yywrap();

void process_name();

int line=1;

%}
digit   [0-9]
number  {digit}|{digit}{digit}|{digit}{digit}{digit}
wspace  [ \t]
newline [\n]
NAME    [a-zA-Z][a-zA-Z0-9]*
ADDRESS {number}"."{number}"."{number}"."{number}

%%

{newline}       {++line;}
"#".*\n         {++line;}
{wspace}
"SUBNET"        {return(SUBNET);}
"NETMASK"       {return(NETMASK);}
"HOST"          {return(HOST);}
"INTERFACE"     {return(INTERFACE);}
"TABLE"         {return(TABLE);}
"ROUTE"         {return(ROUTE);}
"TEST"          {return(TEST);}
"->"            {return(ARROW);}
{NAME}          {process_name();return(NAME);}
{ADDRESS}       {process_name();return(ADDRESS);}
.               {fprintf(stderr,"Lexical Error in line %d of input file\n",line); exit(-1);}

%%

void process_name()
{
   yylval.string=(char *)malloc((strlen(yytext)*sizeof(char))+sizeof(char));
   if (yylval.string == NULL)
   {
      fprintf(stderr,"Error: malloc failed in process_name\n");
      exit(-1);
   }
   else
      strcpy(yylval.string,yytext);
}

int yywrap() {return(1);}