Add src/system.h; this isn't really needed, but it keeps "make update"

[bison.git] / src / scan-skel.l

diff --git a/src/scan-skel.l b/src/scan-skel.l
index 0bb71d196f33fcbbdfc56495244ebe83ed975835..0d7114a7b7f26434dea9f4b5b8c5b34a3c89d61b 100644 (file)
--- a/src/scan-skel.l
+++ b/src/scan-skel.l
@@ -1,6 +1,5 @@
-                                                             /* -*- C -*- */
-/* Scan Bison Skeletons.
-   Copyright (C) 2001  Free Software Foundation, Inc.
+/* Scan Bison Skeletons.                                       -*- C -*-
+   Copyright (C) 2001, 2002  Free Software Foundation, Inc.

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


@@ -19,55 +18,72 @@
    Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
    02111-1307, USA.  */
 
    Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
    02111-1307, USA.  */
 

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

 %{
 #include "system.h"
 %{
 #include "system.h"

-#include "skeleton.h"
-#include "parse-skel.h"
-%}
+#include "quotearg.h"
+#include "error.h"
+#include "getargs.h"
+#include "files.h"

 
 

-%option nounput
-%option noyywrap
-/* If we enable
+int skel_lex (void);

 
 

-   %option yylineno
+%}
+%%

 
 

-   Then we have warning: `yy_flex_realloc' defined but not used.
-   Seems like a Flex bug to me: Why the heck yylineno would trigger
-   the REJECT exception???  */
+%{
+  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;
+}

 
 

-"%%{line}"          { return LINE; }
-"%%{skeleton-line}" { return SLINE; }
+"@@"      fputc ('@', yyout);
+"@{"      fputc ('[', yyout);
+"@}"      fputc (']', yyout);

 
 

-"%%{yacc}"    { return YACC; }
-"%%{section}" { return SECTION; }
+"@oline@"  fprintf (yyout, "%d", lineno);
+"@ofile@"  fputs (quotearg_style (c_quoting_style, outname), yyout);

 
 

-"%%{guards}"   { return GUARDS; }
-"%%{actions}"  { return ACTIONS; }
-"%%{tokendef}" { return TOKENS; }
+"@"       abort ();
+\n        lineno++; ECHO;
+.         ECHO;

 
 

-  /* Muscle.  */
-"%%{"[a-zA-Z][0-9a-zA-Z_-]+"}" {
-  yylval.muscle = xstrndup (yytext + 3, yyleng - 4);
-  return MUSCLE;
-}
+<<EOF>>           xfclose (yyout); free (outname); return EOF;
+%%

 
 

-  /* String.  */
-"%%\"".*"\"" {
-  yylval.string = xstrndup (yytext + 3, yyleng - 4);
-  return STRING;
-}
+/*------------------------.
+| Scan a Bison skeleton.  |
+`------------------------*/

 
 

-  /* End of line.  */
-"\n" {
-  return '\n';
-}
+void scan_skel (FILE *);

 
 

-  /* Plain Character.  */
-. {
-  yylval.character = *yytext;
-  return CHARACTER;
-}
+void
+scan_skel (FILE *in)
+{
+  skel_in = in;
+  skel_lex ();

 
 

-%%
+  /* Reclaim Flex's buffers.  */
+  yy_delete_buffer (YY_CURRENT_BUFFER);
+}