build: look for Perl in configure.

[bison.git] / src / main.c

diff --git a/src/main.c b/src/main.c
index 602d4db6b72e9f94ac8699fc8b296333aa4c0ed7..0396b0f1be425f59b08c7e62dd3b9c9b5b5e410b 100644 (file)
--- a/src/main.c
+++ b/src/main.c
@@ -1,70 +1,91 @@
-/* Top level entry point of bison,
-   Copyright (C) 1984, 1986, 1989, 1992, 1995, 2000, 2001, 2002
-   Free Software Foundation, Inc.
+/* Top level entry point of Bison.
+
+   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., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

 
 

+#include <config.h>

 #include "system.h"
 #include "system.h"

-#include "bitset_stats.h"
-#include "bitset.h"
-#include "getargs.h"
-#include "symtab.h"
-#include "gram.h"
-#include "files.h"
+
+#include <bitset_stats.h>
+#include <bitset.h>
+#include <configmake.h>
+#include <progname.h>
+#include <quotearg.h>
+#include <timevar.h>
+
+#include "LR0.h"
+#include "closeout.h"

 #include "complain.h"
 #include "complain.h"

+#include "conflicts.h"

 #include "derives.h"
 #include "derives.h"

-#include "tables.h"
-#include "output.h"
-#include "reader.h"
+#include "files.h"
+#include "getargs.h"
+#include "gram.h"

 #include "lalr.h"
 #include "lalr.h"

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

 #include "nullable.h"
 #include "nullable.h"

+#include "output.h"

 #include "print.h"
 #include "print.h"

-#include "LR0.h"
-#include "conflicts.h"

 #include "print_graph.h"
 #include "print_graph.h"

-#include "muscle_tab.h"
-
-/* The name this program was run with, for messages.  */
-char *program_name;
-
+#include "print-xml.h"
+#include <quote.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"

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

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

-  time_report = trace_flag & trace_time;
+  timevar_report = trace_flag & trace_time;

   init_timevar ();
   timevar_start (TV_TOTAL);
 
   if (trace_flag & trace_bitsets)
     bitset_stats_enable ();
 
   init_timevar ();
   timevar_start (TV_TOTAL);
 
   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.  */


@@ -73,8 +94,8 @@ main (int argc, char *argv[])
   reader ();
   timevar_pop (TV_READER);
 
   reader ();
   timevar_pop (TV_READER);
 

-  if (complain_message_count)
-    exit (1);
+  if (complaint_issued)
+    goto finish;

 
   /* Find useless nonterminals and productions and reduce the grammar. */
   timevar_push (TV_REDUCE);
 
   /* Find useless nonterminals and productions and reduce the grammar. */
   timevar_push (TV_REDUCE);


@@ -88,16 +109,15 @@ 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
      lookahead is not enough to disambiguate the parsing.  In file
 
   /* Find and record any conflicts: places where one token of
      lookahead is not enough to disambiguate the parsing.  In file


@@ -105,6 +125,15 @@ main (int argc, char *argv[])
      declarations.  */
   timevar_push (TV_CONFLICTS);
   conflicts_solve ();
      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);
 


@@ -113,8 +142,8 @@ 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 ();


@@ -127,7 +156,7 @@ 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);


@@ -135,12 +164,20 @@ 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.  */
   /* Stop if there were errors, to avoid trashing previous output
      files.  */

-  if (complain_message_count)
-    exit (1);
+  if (complaint_issued)
+    goto finish;

 
 

-  /* Lookaheads 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);


@@ -158,24 +195,26 @@ 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 ();
   muscle_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
-  alloca (0);
-#endif
+  uniqstrs_free ();
+  code_scanner_free ();
+  skel_scanner_free ();
+  quotearg_free ();

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

+ finish:
+

   /* Stop timing and print the times.  */
   timevar_stop (TV_TOTAL);
   timevar_print (stderr);
 
   /* Stop timing and print the times.  */
   timevar_stop (TV_TOTAL);
   timevar_print (stderr);
 

-  return complain_message_count ? EXIT_FAILURE : EXIT_SUCCESS;
+  return complaint_issued ? EXIT_FAILURE : EXIT_SUCCESS;

 }
 }