X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/d019d65507d0bfff77bbc3fa34326bd859fd24e1..0e16927b48c881317a38132923b6f3150802a7d3:/src/main.c diff --git a/src/main.c b/src/main.c index 309e7fc5..0396b0f1 100644 --- a/src/main.c +++ b/src/main.c @@ -1,142 +1,220 @@ -/* 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, 2004-2012 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 . */ +#include #include "system.h" -#include "getargs.h" -#include "files.h" + +#include +#include +#include +#include +#include +#include + +#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 +#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" -#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 void berror PARAMS((const char *)); - -extern char *printable_version PARAMS ((int)); - -extern void openfiles PARAMS ((void)); -extern void reader PARAMS ((void)); -extern void reduce_grammar 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)); - - -/* VMS complained about using `int'. */ int main (int argc, char *argv[]) { - program_name = argv[0]; + set_program_name (argv[0]); 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 ("e_quoting_options, "'", "'"); + else + set_quoting_style ("e_quoting_options, locale_quoting_style); + } + + atexit (close_stdout); + + uniqstrs_new (); + muscle_init (); - lineno = 0; getargs (argc, argv); - /* Be ready to clean up if we exit. */ - atexit (done); + timevar_report = trace_flag & trace_time; + init_timevar (); + timevar_start (TV_TOTAL); - openfiles (); + 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 (); - if (complain_message_count) - exit (1); + timevar_pop (TV_READER); - /* find useless nonterminals and productions and reduce the grammar. In - file reduce.c */ + 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. */ - set_derives (); - set_nullable (); + /* Record other info about the grammar. In files derives and + nullable. */ + timevar_push (TV_SETS); + derives_compute (); + 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); - /* make it deterministic. In file lalr. */ - 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 conflicts. Also resolve s/r conflicts based on precedence declarations. */ - initialize_conflicts (); + 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); - /* Print information about results, if requested. In file print. - */ - if (verboseflag) - verbose (); - else - terse (); + /* Compute the parser tables. */ + timevar_push (TV_ACTIONS); + tables_generate (); + timevar_pop (TV_ACTIONS); - /* Output the tables and the parser to ftable. In file output. */ - output (); + grammar_rules_useless_report + (_("rule useless in parser due to conflicts")); - finalize_conflicts (); - free_nullable (); - free_derives (); + /* Output file names. */ + compute_output_file_names (); - exit (complain_message_count ? 1 : 0); -} - -/* 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; }