src/scan-skel.l

   1 /* Scan Bison Skeletons.                                       -*- C -*-
   2    Copyright (C) 2001, 2002  Free Software Foundation, Inc.
   3
   4    This file is part of Bison, the GNU Compiler Compiler.
   5
   6    Bison is free software; you can redistribute it and/or modify it
   7    under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    Bison is distributed in the hope that it will be useful, but
  12    WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with Bison; see the file COPYING.  If not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19    02111-1307, USA.  */
  20
  21 %option nodefault noyywrap nounput
  22 %option prefix="skel_" outfile="lex.yy.c"
  23
  24 %{
  25 #include "system.h"
  26 #include "files.h"
  27 int skel_lex PARAMS ((void));
  28 static int yylineno = 1;
  29 static char *yyoutname = NULL;
  30 %}
  31 %%
  32   /* This is an approximation, but we don't need more. */
  33 ^"#output \""[^\"]+\"\n        {
  34      yytext[yyleng - 2] = '\0';
  35      XFREE (yyoutname);
  36      yyoutname = xstrdup (yytext + strlen ("#output \""));
  37      yyout = xfopen (yyoutname, "w");
  38      yylineno = 1;
  39    }
  40
  41 "__oline__"      fprintf (yyout, "%d", yylineno);
  42 "__ofile__"      fprintf (yyout, "%s", yyoutname);
  43 [^_\n]+          ECHO;
  44 \n+              yylineno += yyleng; ECHO;
  45 .                ECHO;
  46
  47 %%