portability: fix several issues with M4 subprocess.

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

diff --git a/src/scan-skel.l b/src/scan-skel.l
index 5f37fb2c43b873f7d4c363d671de85e7f44d5a91..cd30576b4461e83c913252db0de89ae87fad6904 100644 (file)
--- a/src/scan-skel.l
+++ b/src/scan-skel.l
@@ -1,26 +1,23 @@
 /* Scan Bison Skeletons.                                       -*- C -*-
 
-   Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software
-   Foundation, Inc.
+   Copyright (C) 2001-2007, 2009-2010 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.
+   This program 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 3 of the License, 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.
+   This program 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.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-%option nodefault noyywrap nounput never-interactive debug
+%option nodefault noyywrap noinput nounput never-interactive debug
 %option prefix="skel_" outfile="lex.yy.c"
 
 %{
@@ -72,9 +69,11 @@ static void fail_for_invalid_at (char const *at);
   char *at_directive_argv[AT_DIRECTIVE_ARGC_MAX];
 %}
 
-"@@"      fputc ('@', yyout);
-"@{"      fputc ('[', yyout);
-"@}"      fputc (']', yyout);
+"@@" fputc ('@', yyout);
+"@{" fputc ('[', yyout);
+"@}" fputc (']', yyout);
+"@`" /* Emtpy.  Used by b4_cat in ../data/bison.m4.  */
+@\n  /* Likewise.  */
 
 "@oline@"  fprintf (yyout, "%d", out_lineno + 1);
 "@ofile@"  QPUTS (outname);
@@ -89,7 +88,7 @@ static void fail_for_invalid_at (char const *at);
 }
 
   /* This pattern must not match more than the previous @ patterns. */
-@[^@{}(\n]* fail_for_invalid_at (yytext);
+@[^@{}`(\n]* fail_for_invalid_at (yytext);
 \n        out_lineno++; ECHO;
 [^@\n]+           ECHO;
 
@@ -108,8 +107,9 @@ static void fail_for_invalid_at (char const *at);
   "@@" { obstack_1grow (&obstack_for_string, '@'); }
   "@{" { obstack_1grow (&obstack_for_string, '['); }
   "@}" { obstack_1grow (&obstack_for_string, ']'); }
-  "@`" /* Emtpy.  Useful for starting an argument
+  "@`" /* Empty.  Useful for starting an argument
           that begins with whitespace. */
+  @\n  /* Empty.  */
 
   @[,)] {
     if (at_directive_argc >= AT_DIRECTIVE_ARGC_MAX)
@@ -174,10 +174,10 @@ skel_scanner_free (void)
   yylex_destroy ();
 }
 
-static
-void at_directive_perform (int at_directive_argc,
-                           char *at_directive_argv[],
-                           char **outnamep, int *out_linenop)
+static void
+at_directive_perform (int at_directive_argc,
+                      char *at_directive_argv[],
+                      char **outnamep, int *out_linenop)
 {
   if (0 == strcmp (at_directive_argv[0], "@basename"))
     {
@@ -199,21 +199,21 @@ void at_directive_perform (int at_directive_argc,
         }
       switch (at_directive_argc)
         {
-          case 1:
+          case 2:
             func (_(at_directive_argv[1]));
             break;
-          case 2:
+          case 3:
             func (_(at_directive_argv[1]), at_directive_argv[2]);
             break;
-          case 3:
+          case 4:
             func (_(at_directive_argv[1]), at_directive_argv[2],
                   at_directive_argv[3]);
             break;
-          case 4:
+          case 5:
             func (_(at_directive_argv[1]), at_directive_argv[2],
                   at_directive_argv[3], at_directive_argv[4]);
             break;
-          case 5:
+          case 6:
             func (_(at_directive_argv[1]), at_directive_argv[2],
                   at_directive_argv[3], at_directive_argv[4],
                   at_directive_argv[5]);
@@ -242,21 +242,21 @@ void at_directive_perform (int at_directive_argc,
       boundary_set_from_string (&loc.end, at_directive_argv[2]);
       switch (at_directive_argc)
         {
-          case 3:
+          case 4:
             func (loc, _(at_directive_argv[3]));
             break;
-          case 4:
+          case 5:
             func (loc, _(at_directive_argv[3]), at_directive_argv[4]);
             break;
-          case 5:
+          case 6:
             func (loc, _(at_directive_argv[3]), at_directive_argv[4],
                   at_directive_argv[5]);
             break;
-          case 6:
+          case 7:
             func (loc, _(at_directive_argv[3]), at_directive_argv[4],
                   at_directive_argv[5], at_directive_argv[6]);
             break;
-          case 7:
+          case 8:
             func (loc, _(at_directive_argv[3]), at_directive_argv[4],
                   at_directive_argv[5], at_directive_argv[6],
                   at_directive_argv[7]);
@@ -276,7 +276,7 @@ void at_directive_perform (int at_directive_argc,
           xfclose (yyout);
         }
       *outnamep = xstrdup (at_directive_argv[1]);
-      output_file_name_check (*outnamep);
+      output_file_name_check (outnamep);
       yyout = xfopen (*outnamep, "w");
       *out_linenop = 1;
     }