X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/a98ad01e46d3b39dcc41126c1c865a86bfab90c4..24bb5f8fb7f14df4050cbefd27ae60fa9cef259d:/src/main.c?ds=sidebyside diff --git a/src/main.c b/src/main.c index e27e1a54..3dbac3a9 100644 --- a/src/main.c +++ b/src/main.c @@ -1,238 +1,211 @@ -/* 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, 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 . */ -#include +#include #include "system.h" -#include "machine.h" /* for MAXSHORT */ -extern int lineno; -extern int verboseflag; +#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 "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(); - 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); -} - -/* 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(c) - char c; -{ - static char buf[10]; - if (c < ' ' || c >= '\177') - sprintf(buf, "\\%o", c); - else + 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")) { - 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; -} - -/* Generate a string from the integer I. - Return a ptr to internal memory containing the string. */ - -char * -int_to_string(i) - int i; -{ - static char buf[20]; - sprintf(buf, "%d", i); - return buf; -} + conflicts_print (); + timevar_pop (TV_CONFLICTS); -/* Print the message S for a fatal error. */ - -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); -} + /* 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")); -/* Print a message for a fatal error. Use FMT to construct the message - and incorporate string X1. */ - -void -fatals(fmt, x1) - char *fmt, *x1; -{ - char buffer[200]; - sprintf(buffer, fmt, x1); - fatal(buffer); -} - -/* Print a warning message S. */ - -void -warn(s) - char *s; -{ - extern char *infile; - - if (infile == 0) - fprintf(stderr, "error: %s\n", s); - else - fprintf(stderr, "(\"%s\", line %d) error: %s\n", - infile, lineno, s); - - failure = 1; -} + /* Output file names. */ + compute_output_file_names (); -/* Print a warning message containing the string for the integer X1. - The message is given by the format FMT. */ - -void -warni(fmt, x1) - char *fmt; - int x1; -{ - char buffer[200]; - sprintf(buffer, fmt, x1); - warn(buffer); -} - -/* Print a warning message containing the string X1. - The message is given by the format FMT. */ - -void -warns(fmt, x1) - char *fmt, *x1; -{ - char buffer[200]; - sprintf(buffer, fmt, x1); - warn(buffer); -} - -/* Print a warning message containing the two strings X1 and X2. - The message is given by the format FMT. */ - -void -warnss(fmt, x1, x2) - char *fmt, *x1, *x2; -{ - char buffer[200]; - sprintf(buffer, fmt, x1, x2); - warn(buffer); -} - -/* Print a warning message containing the 3 strings X1, X2, X3. - The message is given by the format FMT. */ - -void -warnsss(fmt, x1, x2, x3) - char *fmt, *x1, *x2, *x3; -{ - char buffer[200]; - sprintf(buffer, fmt, x1, x2, x3); - warn(buffer); -} - -/* 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(s) - char *s; -{ - char buffer[200]; - sprintf(buffer, "limit of %d exceeded, too many %s", MAXSHORT, s); - fatal(buffer); -} + /* 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(s) - char *s; -{ - fprintf(stderr, "internal error, %s\n", 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; }