X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/54bd0db43634c649d13e175384e6e816c44a34d4..e62f1a899168bdf1658dd6d934dea407491a80ff:/src/main.c diff --git a/src/main.c b/src/main.c index dc53fd81..59402c3e 100644 --- a/src/main.c +++ b/src/main.c @@ -1,140 +1,194 @@ -/* 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, 2001, 2002, 2004 + 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. + 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. -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. */ + 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. + 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. */ -#include -#include "system.h" -#include "machine.h" /* JF for MAXSHORT */ - -extern int lineno; -extern int verboseflag; -/* Nonzero means failure has been detected; don't write a parser file. */ -int failure; +#include "system.h" -/* The name this program was run with, for messages. */ +#include +#include +#include + +#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 "muscle_tab.h" +#include "nullable.h" +#include "output.h" +#include "print.h" +#include "print_graph.h" +#include "reader.h" +#include "reduce.h" +#include "symtab.h" +#include "tables.h" +#include "uniqstr.h" + +/* 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); -} + setlocale (LC_ALL, ""); + (void) bindtextdomain (PACKAGE, LOCALEDIR); + (void) textdomain (PACKAGE); -/* functions to report errors which prevent a parser from being generated */ + uniqstrs_new (); -void -fatal(s) -char *s; -{ - extern char *infile; + getargs (argc, argv); - if (infile == 0) - fprintf(stderr, "fatal error: %s\n", s); - else - fprintf(stderr, "\"%s\", line %d: %s\n", infile, lineno, s); - done(1); -} + timevar_report = trace_flag & trace_time; + init_timevar (); + timevar_start (TV_TOTAL); + if (trace_flag & trace_bitsets) + bitset_stats_enable (); -/* 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*/ + muscle_init (); -void -fatals(fmt,x1,x2,x3,x4,x5,x6,x7,x8) -char *fmt; -{ - char buffer[200]; + /* 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. */ - sprintf(buffer, fmt, x1,x2,x3,x4,x5,x6,x7,x8); - fatal(buffer); -} + timevar_push (TV_READER); + reader (); + timevar_pop (TV_READER); + if (complaint_issued) + goto finish; -void -toomany(s) -char *s; -{ - char buffer[200]; + /* Find useless nonterminals and productions and reduce the grammar. */ + timevar_push (TV_REDUCE); + reduce_grammar (); + timevar_pop (TV_REDUCE); - /* JF new msg */ - sprintf(buffer, "limit of %d exceeded, too many %s", MAXSHORT, s); - fatal(buffer); -} + /* 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. */ + timevar_push (TV_LR0); + generate_states (); + timevar_pop (TV_LR0); -void -berror(s) -char *s; -{ - fprintf(stderr, "internal error, %s\n", s); - abort(); + /* make it deterministic. In file lalr. */ + timevar_push (TV_LALR); + lalr (); + timevar_pop (TV_LALR); + + /* Find and record any conflicts: places where one token of + look-ahead 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 (); + conflicts_print (); + timevar_pop (TV_CONFLICTS); + + /* Compute the parser tables. */ + timevar_push (TV_ACTIONS); + tables_generate (); + timevar_pop (TV_ACTIONS); + + grammar_rules_never_reduced_report + (_("rule never reduced because of 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 VCG graph. */ + if (graph_flag) + { + timevar_push (TV_GRAPH); + print_graph (); + timevar_pop (TV_GRAPH); + } + + /* Stop if there were errors, to avoid trashing previous output + files. */ + if (complaint_issued) + goto finish; + + /* Look-ahead 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 (); + + /* The scanner memory cannot be released right after parsing, as it + contains things such as user actions, prologue, epilogue etc. */ + scanner_free (); + muscle_free (); + uniqstrs_free (); + /* If using alloca.c, flush the alloca'ed memory for the benefit of + people running Bison as a library in IDEs. */ +#if C_ALLOCA + { + extern void *alloca (size_t); + alloca (0); + } +#endif + 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; }