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|
/* Scan Bison Skeletons. -*- C -*-
Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 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., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
%option nodefault noyywrap nounput never-interactive debug
%option prefix="skel_" outfile="lex.yy.c"
%{
/* Work around a bug in flex 2.5.31. See Debian bug 333231
<http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=333231>. */
#undef skel_wrap
#define skel_wrap() 1
#include "system.h"
#include <error.h>
#include <quotearg.h>
#include "complain.h"
#include "getargs.h"
#include "files.h"
#include "scan-skel.h"
/* Pacify "gcc -Wmissing-prototypes" when flex 2.5.31 is used. */
int skel_lex (void);
int skel_get_lineno (void);
FILE *skel_get_in (void);
FILE *skel_get_out (void);
int skel_get_leng (void);
char *skel_get_text (void);
void skel_set_lineno (int);
void skel_set_in (FILE *);
void skel_set_out (FILE *);
int skel_get_debug (void);
void skel_set_debug (int);
int skel_lex_destroy (void);
#define QPUTS(String) \
fputs (quotearg_style (c_quoting_style, String), yyout)
#define BASE_QPUTS(File) \
QPUTS (base_name (File))
%}
%%
%{
int lineno IF_LINT (= 0);
char *outname = NULL;
%}
"@output ".*\n {
char const *file_name = yytext + sizeof "@output " - 1;
yytext[yyleng - 1] = '\0';
/* Decode special file names. They include the directory part,
contrary to their "free" occurrences, used for issuing #includes,
which must not include the directory part. */
if (*file_name == '@')
{
if (strcmp (file_name, "@output_header_name@") == 0)
file_name = spec_defines_file;
else if (strcmp (file_name, "@output_parser_name@") == 0)
file_name = parser_file_name;
else
fatal ("invalid token in skeleton: %s", yytext);
}
if (outname)
{
free (outname);
xfclose (yyout);
}
outname = xstrdup (file_name);
yyout = xfopen (outname, "w");
lineno = 1;
}
"@@" fputc ('@', yyout);
"@{" fputc ('[', yyout);
"@}" fputc (']', yyout);
"@oline@" fprintf (yyout, "%d", lineno + 1);
"@ofile@" QPUTS (outname);
"@dir_prefix@" QPUTS (dir_prefix);
"@output_parser_name@" BASE_QPUTS (parser_file_name);
"@output_header_name@" BASE_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>> {
if (outname)
{
free (outname);
xfclose (yyout);
}
return EOF;
}
%%
/*------------------------.
| Scan a Bison skeleton. |
`------------------------*/
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);
}
|
