src/scan-skel.l

/* Scan Bison Skeletons.                                       -*- C -*-
   Copyright (C) 2001, 2002  Free Software Foundation, Inc.

   This file is part of Bison, the GNU Compiler Compiler.

   Bison is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   Bison is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with Bison; see the file COPYING.  If not, write to the Free
   Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
   02111-1307, USA.  */

%option nodefault noyywrap nounput never-interactive debug
%option prefix="skel_" outfile="lex.yy.c"

%{
#include "system.h"
#include "quotearg.h"
#include "error.h"
#include "getargs.h"
#include "files.h"

int skel_lex (void);

#define QPUTS(String) \
   fputs (quotearg_style (c_quoting_style, (String)), yyout);

%}
%%

%{
  int lineno IF_LINT (= 0);
  char *outname = NULL;
%}

"@output ".*\n {
  char const *filename = yytext + sizeof "@output " - 1;
  yytext[yyleng - 1] = '\0';

  if (*filename == '@')
    {
      if (strcmp (filename, "@output_header_name@") == 0)
	filename = spec_defines_file;
      else if (strcmp (filename, "@output_parser_name@") == 0)
	filename = parser_file_name;
      else
	abort ();
    }

  XFREE (outname);
  outname = xstrdup (filename);
  yyout = xfopen (outname, "w");
  lineno = 1;
}

"@@"	   fputc ('@', yyout);
"@{"	   fputc ('[', yyout);
"@}"	   fputc (']', yyout);

"@oline@"  fprintf (yyout, "%d", lineno);
"@ofile@"  QPUTS (outname);
"@output_parser_name@"	QPUTS (parser_file_name);
"@output_header_name@"  QPUTS (spec_defines_file);

"@"	   abort ();
\n	   lineno++; ECHO;
[^@\n]+	   ECHO;

<<EOF>>	   xfclose (yyout); free (outname); return EOF;
%%

/*------------------------.
| Scan a Bison skeleton.  |
`------------------------*/

void scan_skel (FILE *);

void
scan_skel (FILE *in)
{
  skel_in = in;
  skel__flex_debug = trace_flag & trace_skeleton;
  skel_lex ();
  /* Reclaim Flex's buffers.  */
  yy_delete_buffer (YY_CURRENT_BUFFER);
}
Commit	Line	Data
	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 never-interactive debug
	22	%option prefix="skel_" outfile="lex.yy.c"
	23
	24	%{
	25	#include "system.h"
	26	#include "quotearg.h"
	27	#include "error.h"
	28	#include "getargs.h"
	29	#include "files.h"
	30
	31	int skel_lex (void);
	32
	33	#define QPUTS(String) \
	34	fputs (quotearg_style (c_quoting_style, (String)), yyout);
	35
	36	%}
	37	%%
	38
	39	%{
	40	int lineno IF_LINT (= 0);
	41	char *outname = NULL;
	42	%}
	43
	44	"@output ".*\n {
	45	char const *filename = yytext + sizeof "@output " - 1;
	46	yytext[yyleng - 1] = '\0';
	47
	48	if (*filename == '@')
	49	{
	50	if (strcmp (filename, "@output_header_name@") == 0)
	51	filename = spec_defines_file;
	52	else if (strcmp (filename, "@output_parser_name@") == 0)
	53	filename = parser_file_name;
	54	else
	55	abort ();
	56	}
	57
	58	XFREE (outname);
	59	outname = xstrdup (filename);
	60	yyout = xfopen (outname, "w");
	61	lineno = 1;
	62	}
	63
	64	"@@" fputc ('@', yyout);
	65	"@{" fputc ('[', yyout);
	66	"@}" fputc (']', yyout);
	67
	68	"@oline@" fprintf (yyout, "%d", lineno);
	69	"@ofile@" QPUTS (outname);
	70	"@output_parser_name@" QPUTS (parser_file_name);
	71	"@output_header_name@" QPUTS (spec_defines_file);
	72
	73	"@" abort ();
	74	\n lineno++; ECHO;
	75	[^@\n]+ ECHO;
	76
	77	<<EOF>> xfclose (yyout); free (outname); return EOF;
	78	%%
	79
	80	/*------------------------.
	81	\| Scan a Bison skeleton. \|
	82	`------------------------*/
	83
	84	void scan_skel (FILE *);
	85
	86	void
	87	scan_skel (FILE *in)
	88	{
	89	skel_in = in;
	90	skel__flex_debug = trace_flag & trace_skeleton;
	91	skel_lex ();
	92	/* Reclaim Flex's buffers. */
	93	yy_delete_buffer (YY_CURRENT_BUFFER);
	94	}