-/* Top level entry point of bison,
- Copyright (C) 1984, 1986, 1989, 1992, 1995, 2000 Free Software Foundation, Inc.
+/* Top level entry point of Bison.
+
+ Copyright (C) 1984, 1986, 1989, 1992, 1995, 2000-2002, 2004-2011 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
+ 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 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
- 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 <stdio.h>
+#include <config.h>
#include "system.h"
-#include "machine.h" /* for MAXSHORT */
-#include "files.h"
-#include "complain.h"
-
-extern int verboseflag;
-
-#if 0 /* XXX currently unused. */
-/* Nonzero means failure has been detected; don't write a parser file. */
-static int failure;
-#endif
-
-/* The name this program was run with, for messages. */
-char *program_name;
-extern char *printable_version PARAMS((int));
-extern void berror PARAMS((const char *));
+#include <bitset_stats.h>
+#include <bitset.h>
+#include <configmake.h>
+#include <quotearg.h>
+#include <timevar.h>
-extern void getargs PARAMS((int, char *[]));
-extern void openfiles PARAMS((void));
-extern void reader PARAMS((void));
-extern void reduce_grammar PARAMS((void));
-extern void set_derives PARAMS((void));
-extern void free_derives PARAMS((void));
-extern void set_nullable PARAMS((void));
-extern void free_nullable PARAMS((void));
-extern void generate_states PARAMS((void));
-extern void lalr PARAMS((void));
-extern void initialize_conflicts PARAMS((void));
-extern void finalize_conflicts PARAMS((void));
-extern void verbose PARAMS((void));
-extern void terse PARAMS((void));
-extern void output PARAMS((void));
+#include "LR0.h"
+#include "complain.h"
+#include "conflicts.h"
+#include "derives.h"
+#include "files.h"
+#include "getargs.h"
+#include "gram.h"
+#include "lalr.h"
+#include "ielr.h"
+#include "muscle-tab.h"
+#include "nullable.h"
+#include "output.h"
+#include "print.h"
+#include "print_graph.h"
+#include "print-xml.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"
-/* VMS complained about using `int'. */
int
main (int argc, char *argv[])
{
program_name = argv[0];
setlocale (LC_ALL, "");
- bindtextdomain (PACKAGE, LOCALEDIR);
- textdomain (PACKAGE);
-
- lineno = 0;
- getargs(argc, argv);
-
- /* Be ready to clean up if we exit.*/
- atexit (done);
-
- openfiles();
-
- /* 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. */
- reader ();
- if (complain_message_count)
- exit (1);
-
- /* find useless nonterminals and productions and reduce the grammar. In
- file reduce.c */
- reduce_grammar();
+ (void) bindtextdomain (PACKAGE, LOCALEDIR);
+ (void) bindtextdomain ("bison-runtime", LOCALEDIR);
+ (void) textdomain (PACKAGE);
- /* record other info about the grammar. In files derives and nullable. */
- set_derives();
- set_nullable();
+ uniqstrs_new ();
+ muscle_init ();
- /* convert to nondeterministic finite state machine. In file LR0.
- See state.h for more info. */
- generate_states();
+ getargs (argc, argv);
- /* make it deterministic. In file lalr. */
- lalr();
+ timevar_report = trace_flag & trace_time;
+ init_timevar ();
+ timevar_start (TV_TOTAL);
- /* Find and record any conflicts: places where one token of lookahead is not
- enough to disambiguate the parsing. In file conflicts.
- Also resolve s/r conflicts based on precedence declarations. */
- initialize_conflicts();
+ if (trace_flag & trace_bitsets)
+ bitset_stats_enable ();
- /* print information about results, if requested. In file print. */
- if (verboseflag)
- verbose();
- else
- terse();
+ /* 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. */
- /* output the tables and the parser to ftable. In file output. */
- output();
+ timevar_push (TV_READER);
+ reader ();
+ timevar_pop (TV_READER);
+
+ if (complaint_issued)
+ goto finish;
+
+ /* Find useless nonterminals and productions and reduce the grammar. */
+ timevar_push (TV_REDUCE);
+ reduce_grammar ();
+ timevar_pop (TV_REDUCE);
+
+ /* Record other info about the grammar. In files derives and
+ nullable. */
+ timevar_push (TV_SETS);
+ derives_compute ();
+ nullable_compute ();
+ timevar_pop (TV_SETS);
+
+ /* Compute LR(0) parser states. See state.h for more info. */
+ timevar_push (TV_LR0);
+ generate_states ();
+ timevar_pop (TV_LR0);
+
+ /* 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
+ 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);
- finalize_conflicts();
- free_nullable();
- free_derives();
+ /* Compute the parser tables. */
+ timevar_push (TV_ACTIONS);
+ tables_generate ();
+ timevar_pop (TV_ACTIONS);
- exit (complain_message_count ? 1 : 0);
-}
-\f
-/* functions to report errors which prevent a parser from being generated */
+ grammar_rules_useless_report
+ (_("rule useless in parser due to conflicts"));
+ /* Output file names. */
+ compute_output_file_names ();
-/* Return a string containing a printable version of C:
- either C itself, or the corresponding \DDD code. */
+ /* Output the detailed report on the grammar. */
+ if (report_flag)
+ {
+ timevar_push (TV_REPORT);
+ print_results ();
+ timevar_pop (TV_REPORT);
+ }
-char *
-printable_version (int c)
-{
- static char buf[10];
- if (c < ' ' || c >= '\177')
- sprintf(buf, "\\%o", c);
- else
+ /* Output the graph. */
+ if (graph_flag)
{
- buf[0] = c;
- buf[1] = '\0';
+ timevar_push (TV_GRAPH);
+ print_graph ();
+ timevar_pop (TV_GRAPH);
}
- return buf;
-}
-/* Abort for an internal error denoted by string S. */
+ /* Output xml. */
+ if (xml_flag)
+ {
+ timevar_push (TV_XML);
+ print_xml ();
+ timevar_pop (TV_XML);
+ }
-void
-berror (const char *s)
-{
- fprintf (stderr, _("%s: internal error: %s\n"), program_name, s);
- abort();
+ /* Stop if there were errors, to avoid trashing previous output
+ files. */
+ if (complaint_issued)
+ goto finish;
+
+ /* Lookahead tokens are no longer needed. */
+ timevar_push (TV_FREE);
+ lalr_free ();
+ timevar_pop (TV_FREE);
+
+ /* Output the tables and the parser to ftable. In file output. */
+ timevar_push (TV_PARSER);
+ output ();
+ timevar_pop (TV_PARSER);
+
+ timevar_push (TV_FREE);
+ nullable_free ();
+ derives_free ();
+ tables_free ();
+ states_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. */
+ gram_scanner_free ();
+ muscle_free ();
+ uniqstrs_free ();
+ code_scanner_free ();
+ skel_scanner_free ();
+ quotearg_free ();
+ 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);
+
+ return complaint_issued ? EXIT_FAILURE : EXIT_SUCCESS;
}
projects / bison.git / blobdiff