-/* Top level entry point of bison,
- Copyright (C) 1984, 1986, 1989 Free Software Foundation, Inc.
+/* Top level entry point of Bison.
-This file is part of Bison, the GNU Compiler Compiler.
+ Copyright (C) 1984, 1986, 1989, 1992, 1995, 2000-2002, 2004-2012 Free
+ Software Foundation, Inc.
-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 file is part of Bison, the GNU Compiler Compiler.
-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 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.
-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, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 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 this program. If not, see <http://www.gnu.org/licenses/>. */
-#include <stdio.h>
+#include <config.h>
#include "system.h"
-#include "machine.h" /* JF for MAXSHORT */
-extern int lineno;
-extern int verboseflag;
+#include <bitset_stats.h>
+#include <bitset.h>
+#include <configmake.h>
+#include <quotearg.h>
+#include <timevar.h>
+
+#include "LR0.h"
+#include "closeout.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"
-/* Nonzero means failure has been detected; don't write a parser file. */
-int failure;
-/* The name this program was run with, for messages. */
-char *program_name;
-extern void getargs(), openfiles(), reader(), reduce_grammar();
-extern void set_derives(), set_nullable(), generate_states();
-extern void lalr(), initialize_conflicts(), verbose(), terse();
-extern void output(), done();
-
-
-/* VMS complained about using `int'. */
int
-main(argc, argv)
-int argc;
-char *argv[];
+main (int argc, char *argv[])
{
program_name = argv[0];
- failure = 0;
- lineno = 0;
- getargs(argc, argv);
- 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();
-
- /* find useless nonterminals and productions and reduce the grammar. In
- file reduce.c */
- reduce_grammar();
-
- /* record other info about the grammar. In files derives and nullable. */
- set_derives();
- set_nullable();
-
- /* convert to nondeterministic finite state machine. In file LR0.
- See state.h for more info. */
- generate_states();
-
- /* make it deterministic. In file lalr. */
- lalr();
-
- /* Find and record any conflicts: places where one token of lookahead is not
- enough to disambiguate the parsing. In file conflicts.
- Currently this does not do anything to resolve them;
- the trivial form of conflict resolution that exists is done in output. */
- initialize_conflicts();
-
- /* print information about results, if requested. In file print. */
- if (verboseflag)
- verbose();
- else
- terse();
-
- /* output the tables and the parser to ftable. In file output. */
- output();
- done(failure);
-}
-
-/* functions to report errors which prevent a parser from being generated */
-
-void
-fatal(s)
-char *s;
-{
- extern char *infile;
-
- if (infile == 0)
- fprintf(stderr, "fatal error: %s\n", s);
- else
- fprintf(stderr, "\"%s\", line %d: %s\n", infile, lineno, s);
- done(1);
-}
-
-
-/* JF changed to accept/deal with variable args.
- DO NOT change this to use varargs. It will appear to work
- but will break on systems that don't have the necessary library
- functions. This is the ONLY safe way to write such a function. */
-/*VARARGS1*/
-
-void
-fatals(fmt,x1,x2,x3,x4,x5,x6,x7,x8)
-char *fmt;
-{
- char buffer[200];
-
- sprintf(buffer, fmt, x1,x2,x3,x4,x5,x6,x7,x8);
- fatal(buffer);
-}
-
-
-void
-toomany(s)
-char *s;
-{
- char buffer[200];
-
- /* JF new msg */
- sprintf(buffer, "limit of %d exceeded, too many %s", MAXSHORT, s);
- fatal(buffer);
-}
-
-
-void
-berror(s)
-char *s;
-{
- fprintf(stderr, "internal error, %s\n", s);
- abort();
+ setlocale (LC_ALL, "");
+ (void) bindtextdomain (PACKAGE, LOCALEDIR);
+ (void) bindtextdomain ("bison-runtime", LOCALEDIR);
+ (void) textdomain (PACKAGE);
+
+ atexit (close_stdout);
+
+ uniqstrs_new ();
+ muscle_init ();
+
+ getargs (argc, argv);
+
+ timevar_report = trace_flag & trace_time;
+ init_timevar ();
+ timevar_start (TV_TOTAL);
+
+ if (trace_flag & trace_bitsets)
+ bitset_stats_enable ();
+
+ /* 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. */
+
+ 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);
+
+ /* Compute the parser tables. */
+ timevar_push (TV_ACTIONS);
+ tables_generate ();
+ timevar_pop (TV_ACTIONS);
+
+ grammar_rules_useless_report
+ (_("rule useless in parser due to conflicts"));
+
+ /* Output file names. */
+ compute_output_file_names ();
+
+ /* Output the detailed report on the grammar. */
+ if (report_flag)
+ {
+ timevar_push (TV_REPORT);
+ print_results ();
+ timevar_pop (TV_REPORT);
+ }
+
+ /* Output the graph. */
+ if (graph_flag)
+ {
+ timevar_push (TV_GRAPH);
+ print_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;
+
+ /* 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