/*      $NetBSD: msgscan.l,v 1.7 2012/03/06 16:26:01 mbalmer Exp $      */

/*
* Copyright 1997 Piermont Information Systems Inc.
* All rights reserved.
*
* Written by Philip A. Nelson for Piermont Information Systems Inc.
*
* 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.
* 3. The name of Piermont Information Systems Inc. may not be used to endorse
*    or promote products derived from this software without specific prior
*    written permission.
*
* THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
*/

%{
/* scan.l: scanner description for message compiler. */

#include <sys/cdefs.h>

#if defined(__RCSID) && !defined(lint)
__RCSID("$NetBSD: msgscan.l,v 1.7 2012/03/06 16:26:01 mbalmer Exp $");
#endif


#include <stdio.h>
#include <string.h>
#include "defs.h"
#include "msgparse.h"

static int level;       /* For nested comments. */

%}

%x COMMENT
%x BRACE

%option noinput

%%

[ \t]+  { /* ignore spaces and tabs */ }

[\n]    { line_no++; }

";"     { return (int)yytext[0]; }

message { return MESSAGE; }

[a-zA-Z][a-zA-Z0-9_]* {
         yylval.s_value = strdup(yytext);
         return(NAME);
       }

"/*"  { level = 1; BEGIN COMMENT;  }

<COMMENT>"/*" { level++; }

<COMMENT>"*/" { if (level-- == 1) BEGIN 0; }

<COMMENT>"\n" { line_no++; }

<COMMENT><<EOF>> { yyerror ("EOF inside a comment."); exit (1); }

<COMMENT>.  {/* eat character */}

"{"     { level = 1; BEGIN BRACE; }

<BRACE>"\\{"    { buff_add_ch('{'); }

<BRACE>"\\}"    { buff_add_ch('}'); }

<BRACE>"{"      { buff_add_ch(yytext[0]); level++; }

<BRACE>"}"      { if (level-- == 1)  {
                       BEGIN 0;
                       yylval.s_value = buff_copy();
                       return VALUE;
                 } else
                       buff_add_ch (yytext[0]);
               }

<BRACE>"\n"     { buff_add_ch (yytext[0]); line_no++; }

<BRACE>.        { buff_add_ch (yytext[0]); }

      {
         if (yytext[0] < ' ')
           yyerror ("illegal character: ^%c",yytext[0] + '@');
         else
           if (yytext[0] > '~')
             yyerror ("illegal character: \\%3d", (int) yytext[0]);
           else
             yyerror ("illegal character: %s",yytext);

         /* To quiet the compiler */
         if (0) unput(0);
       }
%%

#ifdef SCAN
YYSTYPE yylval;

main()
{
 int val;

 line_no = 1;
 while ( (val = yylex()) != 0 )
   printf ("val = %d\n yytext = %s\n", val, yytext);
}
#endif