X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/c49a8e71cec845d32366432b824a9317e4a80160..95361618dee181507d53f47de2dd50c667b84007:/src/main.c diff --git a/src/main.c b/src/main.c index 88b0dd3b..0396b0f1 100644 --- a/src/main.c +++ b/src/main.c @@ -1,264 +1,220 @@ -/* Top level entry point of bison, - Copyright (C) 1984, 1986, 1989, 1992, 1995 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, Inc., 59 Temple Place - Suite 330, -Boston, MA 02111-1307, 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 . */ -#include +#include #include "system.h" -#include "machine.h" /* for MAXSHORT */ - -extern int lineno; -extern int verboseflag; -extern char *infile; - -/* 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; - -char *printable_version PARAMS((int)); -char *int_to_string PARAMS((int)); -void fatal PARAMS((char *)); -void fatals PARAMS((char *, char *)); -void warn PARAMS((char *)); -void warni PARAMS((char *, int)); -void warns PARAMS((char *, char *)); -void warnss PARAMS((char *, char *, char *)); -void warnsss PARAMS((char *, char *, char *, char *)); -void toomany PARAMS((char *)); -void berror PARAMS((char *)); - -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 set_nullable PARAMS((void)); -extern void generate_states PARAMS((void)); -extern void lalr PARAMS((void)); -extern void initialize_conflicts PARAMS((void)); -extern void verbose PARAMS((void)); -extern void terse PARAMS((void)); -extern void output PARAMS((void)); -extern void done PARAMS((int)); - - -/* VMS complained about using `int'. */ + +#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" + int main (int argc, char *argv[]) { - program_name = argv[0]; + set_program_name (argv[0]); setlocale (LC_ALL, ""); - bindtextdomain (PACKAGE, LOCALEDIR); - textdomain (PACKAGE); - - 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(); - if (failure) - done(failure); - - /* 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. - Also resolve s/r conflicts based on precedence declarations. */ - 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); - return failure; -} - -/* functions to report errors which prevent a parser from being generated */ - - -/* Return a string containing a printable version of C: - either C itself, or the corresponding \DDD code. */ - -char * -printable_version (int c) -{ - static char buf[10]; - if (c < ' ' || c >= '\177') - sprintf(buf, "\\%o", c); - else + (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 (); + + 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")) { - buf[0] = c; - buf[1] = '\0'; + 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); } - return buf; -} + conflicts_print (); + timevar_pop (TV_CONFLICTS); -/* Generate a string from the integer I. - Return a ptr to internal memory containing the string. */ + /* Compute the parser tables. */ + timevar_push (TV_ACTIONS); + tables_generate (); + timevar_pop (TV_ACTIONS); -char * -int_to_string (int i) -{ - static char buf[20]; - sprintf(buf, "%d", i); - return buf; -} + grammar_rules_useless_report + (_("rule useless in parser due to conflicts")); -static void -fatal_banner (void) -{ - if (infile == 0) - fprintf(stderr, _("%s: fatal error: "), program_name); - else - fprintf(stderr, _("%s:%d: fatal error: "), infile, lineno); -} - -/* Print the message S for a fatal error. */ + /* Output file names. */ + compute_output_file_names (); -void -fatal (char *s) -{ - fatal_banner (); - fputs (s, stderr); - fputc ('\n', stderr); - done (1); -} - - -/* Print a message for a fatal error. Use FMT to construct the message - and incorporate string X1. */ - -void -fatals (char *fmt, char *x1) -{ - fatal_banner (); - fprintf (stderr, fmt, x1); - fputc ('\n', stderr); - done (1); -} - -static void -warn_banner (void) -{ - if (infile == 0) - fprintf(stderr, _("%s: "), program_name); - else - fprintf(stderr, _("%s:%d: "), infile, lineno); - failure = 1; -} - -/* Print a warning message S. */ - -void -warn (char *s) -{ - warn_banner (); - fputs (s, stderr); - fputc ('\n', stderr); -} - -/* Print a warning message containing the string for the integer X1. - The message is given by the format FMT. */ - -void -warni (char *fmt, int x1) -{ - warn_banner (); - fprintf (stderr, fmt, x1); - fputc ('\n', stderr); -} - -/* Print a warning message containing the string X1. - The message is given by the format FMT. */ - -void -warns (char *fmt, char *x1) -{ - warn_banner (); - fprintf (stderr, fmt, x1); - fputc ('\n', stderr); -} - -/* Print a warning message containing the two strings X1 and X2. - The message is given by the format FMT. */ - -void -warnss (char *fmt, char *x1, char *x2) -{ - warn_banner (); - fprintf (stderr, fmt, x1, x2); - fputc ('\n', stderr); -} - -/* Print a warning message containing the 3 strings X1, X2, X3. - The message is given by the format FMT. */ - -void -warnsss (char *fmt, char *x1, char *x2, char *x3) -{ - warn_banner (); - fprintf (stderr, fmt, x1, x2, x3); - fputc ('\n', stderr); -} - -/* Print a message for the fatal occurence of more than MAXSHORT - instances of whatever is denoted by the string S. */ + /* Output the detailed report on the grammar. */ + if (report_flag) + { + timevar_push (TV_REPORT); + print_results (); + timevar_pop (TV_REPORT); + } -void -toomany (char *s) -{ - fatal_banner (); - fprintf (stderr, _("too many %s (max %d)"), s, MAXSHORT); - fputc ('\n', stderr); - done (1); -} + /* Output the graph. */ + if (graph_flag) + { + timevar_push (TV_GRAPH); + print_graph (); + timevar_pop (TV_GRAPH); + } -/* 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 (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; }