Merge remote-tracking branch 'origin/maint'

[bison.git] / src / main.c

diff --git a/src/main.c b/src/main.c
index b2f855996b372410d0af173e35d47a484b3a2675..093e9cb26674aeb0502b16e892f2c2906ae97e43 100644 (file)
--- a/src/main.c
+++ b/src/main.c
@@ -1,33 +1,35 @@
 /* Top level entry point of Bison.
 
 /* Top level entry point of Bison.
 

-   Copyright (C) 1984, 1986, 1989, 1992, 1995, 2000, 2001, 2002, 2004
-   Free Software Foundation, Inc.
+   Copyright (C) 1984, 1986, 1989, 1992, 1995, 2000-2002, 2004-2012 Free
+   Software Foundation, Inc.

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

-   Bison is free software; you can redistribute it and/or modify
+   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
    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.
+   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,
+   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
    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/>.  */

 
 

+#include <config.h>

 #include "system.h"
 
 #include <bitset_stats.h>
 #include <bitset.h>
 #include "system.h"
 
 #include <bitset_stats.h>
 #include <bitset.h>

+#include <configmake.h>
+#include <progname.h>
+#include <quotearg.h>

 #include <timevar.h>
 
 #include "LR0.h"
 #include <timevar.h>
 
 #include "LR0.h"

+#include "closeout.h"

 #include "complain.h"
 #include "conflicts.h"
 #include "derives.h"
 #include "complain.h"
 #include "conflicts.h"
 #include "derives.h"


@@ -35,32 +37,45 @@
 #include "getargs.h"
 #include "gram.h"
 #include "lalr.h"
 #include "getargs.h"
 #include "gram.h"
 #include "lalr.h"

-#include "muscle_tab.h"
+#include "ielr.h"
+#include "muscle-tab.h"

 #include "nullable.h"
 #include "output.h"
 #include "print.h"
 #include "print_graph.h"
 #include "nullable.h"
 #include "output.h"
 #include "print.h"
 #include "print_graph.h"

+#include "print-xml.h"
+#include <quote.h>

 #include "reader.h"
 #include "reduce.h"
 #include "reader.h"
 #include "reduce.h"

+#include "scan-code.h"
+#include "scan-gram.h"
+#include "scan-skel.h"

 #include "symtab.h"
 #include "tables.h"
 #include "uniqstr.h"
 
 #include "symtab.h"
 #include "tables.h"
 #include "uniqstr.h"
 

-/* The name this program was run with, for messages.  */
-char *program_name;
-
-

 
 int
 main (int argc, char *argv[])
 {
 
 int
 main (int argc, char *argv[])
 {

-  program_name = argv[0];
+  set_program_name (argv[0]);

   setlocale (LC_ALL, "");
   setlocale (LC_ALL, "");

-  bindtextdomain (PACKAGE, LOCALEDIR);
-  bindtextdomain ("bison-runtime", LOCALEDIR);
-  textdomain (PACKAGE);
+  (void) bindtextdomain (PACKAGE, LOCALEDIR);
+  (void) bindtextdomain ("bison-runtime", LOCALEDIR);
+  (void) textdomain (PACKAGE);
+
+  {
+    char const *cp = getenv ("LC_CTYPE");
+    if (cp && STREQ (cp, "C"))
+      set_custom_quoting (&quote_quoting_options, "'", "'");
+    else
+      set_quoting_style (&quote_quoting_options, locale_quoting_style);
+  }
+
+  atexit (close_stdout);

 
   uniqstrs_new ();
 
   uniqstrs_new ();

+  muscle_init ();

 
   getargs (argc, argv);
 
 
   getargs (argc, argv);
 


@@ -71,8 +86,6 @@ main (int argc, char *argv[])
   if (trace_flag & trace_bitsets)
     bitset_stats_enable ();
 
   if (trace_flag & trace_bitsets)
     bitset_stats_enable ();
 

-  muscle_init ();
-

   /* Read the input.  Copy some parts of it to FGUARD, FACTION, FTABLE
      and FATTRS.  In file reader.c.  The other parts are recorded in
      the grammar; see gram.h.  */
   /* Read the input.  Copy some parts of it to FGUARD, FACTION, FTABLE
      and FATTRS.  In file reader.c.  The other parts are recorded in
      the grammar; see gram.h.  */


@@ -96,23 +109,31 @@ main (int argc, char *argv[])
   nullable_compute ();
   timevar_pop (TV_SETS);
 
   nullable_compute ();
   timevar_pop (TV_SETS);
 

-  /* Convert to nondeterministic finite state machine.  In file LR0.
-     See state.h for more info.  */
+  /* Compute LR(0) parser states.  See state.h for more info.  */

   timevar_push (TV_LR0);
   generate_states ();
   timevar_pop (TV_LR0);
 
   timevar_push (TV_LR0);
   generate_states ();
   timevar_pop (TV_LR0);
 

-  /* make it deterministic.  In file lalr.  */
-  timevar_push (TV_LALR);
-  lalr ();
-  timevar_pop (TV_LALR);
+  /* Add lookahead sets to parser states.  Except when LALR(1) is
+     requested, split states to eliminate LR(1)-relative
+     inadequacies.  */
+  ielr ();

 
   /* Find and record any conflicts: places where one token of
 
   /* Find and record any conflicts: places where one token of

-     look-ahead is not enough to disambiguate the parsing.  In file
+     lookahead is not enough to disambiguate the parsing.  In file

      conflicts.  Also resolve s/r conflicts based on precedence
      declarations.  */
   timevar_push (TV_CONFLICTS);
   conflicts_solve ();
      conflicts.  Also resolve s/r conflicts based on precedence
      declarations.  */
   timevar_push (TV_CONFLICTS);
   conflicts_solve ();

+  if (!muscle_percent_define_flag_if ("lr.keep-unreachable-states"))
+    {
+      state_number *old_to_new = xnmalloc (nstates, sizeof *old_to_new);
+      state_number nstates_old = nstates;
+      state_remove_unreachable_states (old_to_new);
+      lalr_update_state_numbers (old_to_new, nstates_old);
+      conflicts_update_state_numbers (old_to_new, nstates_old);
+      free (old_to_new);
+    }

   conflicts_print ();
   timevar_pop (TV_CONFLICTS);
 
   conflicts_print ();
   timevar_pop (TV_CONFLICTS);
 


@@ -121,8 +142,7 @@ main (int argc, char *argv[])
   tables_generate ();
   timevar_pop (TV_ACTIONS);
 
   tables_generate ();
   timevar_pop (TV_ACTIONS);
 

-  grammar_rules_never_reduced_report
-    (_("rule never reduced because of conflicts"));
+  grammar_rules_useless_report (_("rule useless in parser due to conflicts"));

 
   /* Output file names. */
   compute_output_file_names ();
 
   /* Output file names. */
   compute_output_file_names ();


@@ -135,7 +155,7 @@ main (int argc, char *argv[])
       timevar_pop (TV_REPORT);
     }
 
       timevar_pop (TV_REPORT);
     }
 

-  /* Output the VCG graph.  */
+  /* Output the graph.  */

   if (graph_flag)
     {
       timevar_push (TV_GRAPH);
   if (graph_flag)
     {
       timevar_push (TV_GRAPH);


@@ -143,12 +163,20 @@ main (int argc, char *argv[])
       timevar_pop (TV_GRAPH);
     }
 
       timevar_pop (TV_GRAPH);
     }
 

+  /* Output xml.  */
+  if (xml_flag)
+    {
+      timevar_push (TV_XML);
+      print_xml ();
+      timevar_pop (TV_XML);
+    }
+

   /* Stop if there were errors, to avoid trashing previous output
      files.  */
   if (complaint_issued)
     goto finish;
 
   /* Stop if there were errors, to avoid trashing previous output
      files.  */
   if (complaint_issued)
     goto finish;
 

-  /* Look-ahead tokens are no longer needed. */
+  /* Lookahead tokens are no longer needed. */

   timevar_push (TV_FREE);
   lalr_free ();
   timevar_pop (TV_FREE);
   timevar_push (TV_FREE);
   lalr_free ();
   timevar_pop (TV_FREE);


@@ -166,20 +194,16 @@ main (int argc, char *argv[])
   reduce_free ();
   conflicts_free ();
   grammar_free ();
   reduce_free ();
   conflicts_free ();
   grammar_free ();

+  output_file_names_free ();

 
   /* The scanner memory cannot be released right after parsing, as it
      contains things such as user actions, prologue, epilogue etc.  */
 
   /* The scanner memory cannot be released right after parsing, as it
      contains things such as user actions, prologue, epilogue etc.  */

-  scanner_free ();
+  gram_scanner_free ();

   muscle_free ();
   uniqstrs_free ();
   muscle_free ();
   uniqstrs_free ();

-  /* If using alloca.c, flush the alloca'ed memory for the benefit of
-     people running Bison as a library in IDEs.  */
-#if C_ALLOCA
-  {
-    extern void *alloca (size_t);
-    alloca (0);
-  }
-#endif
+  code_scanner_free ();
+  skel_scanner_free ();
+  quotearg_free ();

   timevar_pop (TV_FREE);
 
   if (trace_flag & trace_bitsets)
   timevar_pop (TV_FREE);
 
   if (trace_flag & trace_bitsets)