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100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
/* Scan Bison Skeletons. -*- C -*-
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Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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Bison is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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Bison is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bison; see the file COPYING. If not, write to the Free
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Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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%option nodefault noyywrap nounput never-interactive debug
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%option prefix="skel_" outfile="lex.yy.c"
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%{
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#include "system.h"
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#include <error.h>
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#include <quotearg.h>
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#include "getargs.h"
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#include "files.h"
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int skel_lex (void);
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#define QPUTS(String) \
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fputs (quotearg_style (c_quoting_style, (String)), yyout)
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%}
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%%
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%{
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int lineno IF_LINT (= 0);
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char *outname = NULL;
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%}
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"@output ".*\n {
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char const *filename = yytext + sizeof "@output " - 1;
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yytext[yyleng - 1] = '\0';
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if (*filename == '@')
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{
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if (strcmp (filename, "@output_header_name@") == 0)
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filename = spec_defines_file;
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else if (strcmp (filename, "@output_parser_name@") == 0)
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filename = parser_file_name;
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else
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fatal ("invalid token in skeleton: %s", yytext);
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}
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free (outname);
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outname = xstrdup (filename);
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xfclose (yyout);
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yyout = xfopen (outname, "w");
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lineno = 1;
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}
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"@@" fputc ('@', yyout);
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"@{" fputc ('[', yyout);
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"@}" fputc (']', yyout);
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"@oline@" fprintf (yyout, "%d", lineno + 1);
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"@ofile@" QPUTS (outname);
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"@output_parser_name@" QPUTS (parser_file_name);
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"@output_header_name@" QPUTS (spec_defines_file);
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/* This pattern must not match more than the previous @ patterns. */
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@[^{}@\n]* fatal ("invalid @ in skeleton: %s", yytext);
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\n lineno++; ECHO;
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[^@\n]+ ECHO;
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<<EOF>> xfclose (yyout); free (outname); return EOF;
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%%
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/*------------------------.
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| Scan a Bison skeleton. |
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`------------------------*/
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void scan_skel (FILE *);
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void
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scan_skel (FILE *in)
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{
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skel_in = in;
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skel__flex_debug = trace_flag & trace_skeleton;
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skel_lex ();
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/* Reclaim Flex's buffers. */
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yy_delete_buffer (YY_CURRENT_BUFFER);
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}
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