DJGPP specific file.

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

diff --git a/src/scan-skel.l b/src/scan-skel.l
index 0bb71d196f33fcbbdfc56495244ebe83ed975835..b14fb40c1f5e467de957a116e2cbe89e6267c35c 100644 (file)
--- a/src/scan-skel.l
+++ b/src/scan-skel.l
@@ -1,6 +1,6 @@
-                                                             /* -*- C -*- */
-/* Scan Bison Skeletons.
-   Copyright (C) 2001  Free Software Foundation, Inc.
+/* Scan Bison Skeletons.                                       -*- C -*-
+
+   Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.

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


@@ -16,58 +16,110 @@
 
    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
 
    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.  */
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301, USA.  */

 
 

-%{
-#include "system.h"
-#include "skeleton.h"
-#include "parse-skel.h"
-%}
+%option nodefault noyywrap nounput never-interactive debug
+%option prefix="skel_" outfile="lex.yy.c"

 
 

-%option nounput
-%option noyywrap
-/* If we enable
+%{
+/* 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

 
 

-   %option yylineno
+#include "system.h"

 
 

-   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???  */
+#include <error.h>
+#include <quotearg.h>

 
 

-%%
+#include "complain.h"
+#include "getargs.h"
+#include "files.h"
+#include "scan-skel.h"

 
 

-"%%{line}"          { return LINE; }
-"%%{skeleton-line}" { return SLINE; }
+#define QPUTS(String) \
+   fputs (quotearg_style (c_quoting_style, (String)), yyout)

 
 

-"%%{yacc}"    { return YACC; }
-"%%{section}" { return SECTION; }
+#define BASE_QPUTS(File) \
+   assert (File), QPUTS (base_name (File))

 
 

-"%%{guards}"   { return GUARDS; }
-"%%{actions}"  { return ACTIONS; }
-"%%{tokendef}" { return TOKENS; }
+%}
+%%

 
 

-  /* Muscle.  */
-"%%{"[a-zA-Z][0-9a-zA-Z_-]+"}" {
-  yylval.muscle = xstrndup (yytext + 3, yyleng - 4);
-  return MUSCLE;
-}
+%{
+  int lineno IF_LINT (= 0);
+  char *outname = NULL;
+%}

 
 

-  /* String.  */
-"%%\"".*"\"" {
-  yylval.string = xstrndup (yytext + 3, yyleng - 4);
-  return STRING;
+"@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)
+       {
+         assert (spec_defines_file);
+         file_name = spec_defines_file;
+       }
+      else if (strcmp (file_name, "@output_parser_name@") == 0)
+       {
+         assert (parser_file_name);
+         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;

 }
 
 }
 

-  /* End of line.  */
-"\n" {
-  return '\n';
+"@@"      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;

 }
 }

+%%

 
 

-  /* Plain Character.  */
-. {
-  yylval.character = *yytext;
-  return CHARACTER;
+/*------------------------.
+| 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);

 }
 }

-
-%%