/*
* This file is part of flex.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE.
*/

%{
/* A template scanner file to build "scanner.c".
  Run as:
         test-lineno-trailing    # report flex's yylineno
         test-lineno-trailing 1  # report count_newlines(stdin)
*/

#include <stdio.h>
#include <stdlib.h>
#include "config.h"

%}

%option 8bit prefix="test"
%option nounput nomain noyywrap noinput yylineno
%option warn

WORD [[:alpha:]]+

%%
   /* The goal here is to test the yylineno in the context of trailing-contexts.
      Using rules that have newlines in look-ahead.
   */
"Fixed_trailing:"/[\n]"test"[\n] {}
"Var_trailing:"{WORD}/[\n] {}
"Var_prefix_and_trailing:"{WORD}":"/(\n{WORD})* {}
\n                     {}
                     {}
<<EOF>>  { printf("%d\n", yylineno);
          yyterminate();
        }

%%

/* returns number of '\n' characters in input, plus one.
  This is what flex does, essentially. */

static int
count_newlines (FILE* in)
{
   int n=1,c;
   while ((c=fgetc(in)) != EOF)
       if( c == '\n')
           n++;
   return n;
}

int main ( int, char**);

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

   if( argc > 1 )
       printf("%d\n", count_newlines(stdin));

   else{
       yyin = stdin;
       yyout = stdout;
       yylex();
   }
   return 0;
}