Sync.

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

diff --git a/src/scan-skel.l b/src/scan-skel.l
index 2d9cef1317d2025b36df6f1570875cba4fdd25aa..3cb2178aa17e18f8c5d58606d6686d7f0a3fde23 100644 (file)
--- a/src/scan-skel.l
+++ b/src/scan-skel.l
@@ -1,5 +1,6 @@
 /* Scan Bison Skeletons.                                       -*- C -*-
 /* Scan Bison Skeletons.                                       -*- C -*-

-   Copyright (C) 2001, 2002  Free Software Foundation, Inc.
+
+   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.
 


@@ -15,86 +16,95 @@
 
    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.  */

 
 

-%option nodefault noyywrap nounput never-interactive
+%option nodefault noyywrap nounput never-interactive debug

 %option prefix="skel_" outfile="lex.yy.c"
 
 %{
 #include "system.h"
 %option prefix="skel_" outfile="lex.yy.c"
 
 %{
 #include "system.h"

-#include "error.h"
+
+#include <error.h>
+#include <quotearg.h>
+
+#include "complain.h"

 #include "getargs.h"
 #include "files.h"
 #include "getargs.h"
 #include "files.h"

-int skel_lex PARAMS ((void));
-static int yylineno = 1;
-static char *yyoutname = NULL;
+
+int skel_lex (void);
+
+#define QPUTS(String) \
+   fputs (quotearg_style (c_quoting_style, (String)), yyout)
+

 %}
 %%
 %}
 %%

-  /* This is an approximation, but we don't need more. */
-^"#output \""[^\"]+\"\n        {
-     yytext[yyleng - 2] = '\0';
-     XFREE (yyoutname);
-     yyoutname = xstrdup (yytext + strlen ("#output \""));
-     yyout = xfopen (yyoutname, "w");
-     yylineno = 1;
-   }
-
-"@<:@"           fputc ('[', yyout);
-"@:>@"           fputc (']', yyout);
-
-"__oline__"      fprintf (yyout, "%d", yylineno+1);
-"__ofile__"      fprintf (yyout, "%s", yyoutname);
-[^@_\n]+         ECHO;
-\n+              yylineno += yyleng; ECHO;
-.                ECHO;
-
-<<EOF>>          xfclose (yyout); free (yyoutname); return EOF;
-%%

 
 

-/* From lib/readpipe.c.  */
-FILE *readpipe PARAMS ((const char *, ...));
+%{
+  int lineno IF_LINT (= 0);
+  char *outname = NULL;
+%}
+
+"@output ".*\n {
+  char const *filename = yytext + sizeof "@output " - 1;
+  yytext[yyleng - 1] = '\0';

 
 

-/*----------------------.
-| Run our backend, M4.  |
-`----------------------*/
+  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);
+    }

 
 

-void m4_invoke PARAMS ((const char *definitions));
+  if (outname)
+    {
+      free (outname);
+      xfclose (yyout);
+    }
+  outname = xstrdup (filename);
+  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>> {
+  if (outname)
+    {
+      free (outname);
+      xfclose (yyout);
+    }
+  return EOF;
+}
+%%
+
+/*------------------------.
+| Scan a Bison skeleton.  |
+`------------------------*/
+
+void scan_skel (FILE *);

 
 void
 
 void

-m4_invoke (const char *definitions)
+scan_skel (FILE *in)

 {
 {

-  /* Invoke m4 on the definition of the muscles, and the skeleton. */
-  const char *bison_pkgdatadir = getenv ("BISON_PKGDATADIR");
-  const char *m4 = getenv ("M4");
-  int pkg_data_len;
-  char *full_skeleton;
-
-  if (!m4)
-    m4 = M4;
-  if (!bison_pkgdatadir)
-    bison_pkgdatadir = PKGDATADIR;
-  pkg_data_len = strlen (bison_pkgdatadir);
-  full_skeleton = XMALLOC (char, pkg_data_len + strlen (skeleton) + 2);
-  if (bison_pkgdatadir[pkg_data_len-1] == '/')
-    sprintf (full_skeleton, "%s%s", bison_pkgdatadir, skeleton);
-  else
-    sprintf (full_skeleton, "%s/%s", bison_pkgdatadir, skeleton);
-  if (trace_flag)
-    fprintf (stderr,
-            "running: %s -I %s m4sugar/m4sugar.m4 %s %s\n",
-            m4, bison_pkgdatadir, definitions, full_skeleton);
-  skel_in = readpipe (m4,
-                     "-I", bison_pkgdatadir,
-                     "m4sugar/m4sugar.m4",
-                     definitions,
-                     full_skeleton,
-                     NULL);
-  XFREE (full_skeleton);
-  if (!skel_in)
-    error (EXIT_FAILURE, errno, "cannot run m4");
+  skel_in = in;
+  skel__flex_debug = trace_flag & trace_skeleton;

   skel_lex ();
   skel_lex ();

-

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