src/scan-skel.l

/* Scan Bison Skeletons.                                       -*- C -*-

   Copyright (C) 2001, 2002, 2003, 2004 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 <error.h>
#include <quotearg.h>

#include "complain.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
	fatal ("invalid token in skeleton: %s", yytext);
    }

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

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

"@oline@"  fprintf (yyout, "%d", lineno + 1);
"@ofile@"  QPUTS (outname);
"@output_parser_name@"	QPUTS (parser_file_name);
"@output_header_name@"  QPUTS (spec_defines_file);

  /* This pattern must not match more than the previous @ patterns. */
@[^{}@\n]* fatal ("invalid @ in skeleton: %s", yytext);
\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
	3	Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
	4
	5	This file is part of Bison, the GNU Compiler Compiler.
	6
	7	Bison is free software; you can redistribute it and/or modify it
	8	under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2, or (at your option)
	10	any later version.
	11
	12	Bison is distributed in the hope that it will be useful, but
	13	WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with Bison; see the file COPYING. If not, write to the Free
	19	Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
	20	02111-1307, USA. */
	21
	22	%option nodefault noyywrap nounput never-interactive debug
	23	%option prefix="skel_" outfile="lex.yy.c"
	24
	25	%{
	26	#include "system.h"
	27
	28	#include <error.h>
	29	#include <quotearg.h>
	30
	31	#include "complain.h"
	32	#include "getargs.h"
	33	#include "files.h"
	34
	35	int skel_lex (void);
	36
	37	#define QPUTS(String) \
	38	fputs (quotearg_style (c_quoting_style, (String)), yyout)
	39
	40	%}
	41	%%
	42
	43	%{
	44	int lineno IF_LINT (= 0);
	45	char *outname = NULL;
	46	%}
	47
	48	"@output ".*\n {
	49	char const *filename = yytext + sizeof "@output " - 1;
	50	yytext[yyleng - 1] = '\0';
	51
	52	if (*filename == '@')
	53	{
	54	if (strcmp (filename, "@output_header_name@") == 0)
	55	filename = spec_defines_file;
	56	else if (strcmp (filename, "@output_parser_name@") == 0)
	57	filename = parser_file_name;
	58	else
	59	fatal ("invalid token in skeleton: %s", yytext);
	60	}
	61
	62	free (outname);
	63	outname = xstrdup (filename);
	64	xfclose (yyout);
	65	yyout = xfopen (outname, "w");
	66	lineno = 1;
	67	}
	68
	69	"@@" fputc ('@', yyout);
	70	"@{" fputc ('[', yyout);
	71	"@}" fputc (']', yyout);
	72
	73	"@oline@" fprintf (yyout, "%d", lineno + 1);
	74	"@ofile@" QPUTS (outname);
	75	"@output_parser_name@" QPUTS (parser_file_name);
	76	"@output_header_name@" QPUTS (spec_defines_file);
	77
	78	/* This pattern must not match more than the previous @ patterns. */
	79	@[^{}@\n]* fatal ("invalid @ in skeleton: %s", yytext);
	80	\n lineno++; ECHO;
	81	[^@\n]+ ECHO;
	82
	83	<<EOF>> xfclose (yyout); free (outname); return EOF;
	84	%%
	85
	86	/*------------------------.
	87	\| Scan a Bison skeleton. \|
	88	`------------------------*/
	89
	90	void scan_skel (FILE *);
	91
	92	void
	93	scan_skel (FILE *in)
	94	{
	95	skel_in = in;
	96	skel__flex_debug = trace_flag & trace_skeleton;
	97	skel_lex ();
	98	/* Reclaim Flex's buffers. */
	99	yy_delete_buffer (YY_CURRENT_BUFFER);
	100	}