X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/4a120d45e6a181ced2f24f2f6d23e2faa9fbd778..e62f1a899168bdf1658dd6d934dea407491a80ff:/src/main.c diff --git a/src/main.c b/src/main.c index 26ca20b7..59402c3e 100644 --- a/src/main.c +++ b/src/main.c @@ -1,5 +1,7 @@ -/* 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, 2001, 2002, 2004 + Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. @@ -19,126 +21,174 @@ Boston, MA 02111-1307, USA. */ -#include #include "system.h" -#include "machine.h" /* for MAXSHORT */ -#include "files.h" -#include "complain.h" -extern int verboseflag; +#include +#include +#include -#if 0 /* XXX currently unused. */ -/* Nonzero means failure has been detected; don't write a parser file. */ -static int failure; -#endif +#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 char *printable_version PARAMS((int)); -extern void berror PARAMS((const 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 free_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 finalize_conflicts PARAMS((void)); -extern void verbose PARAMS((void)); -extern void terse PARAMS((void)); -extern void output PARAMS((void)); -/* VMS complained about using `int'. */ - int main (int argc, char *argv[]) { program_name = argv[0]; setlocale (LC_ALL, ""); - bindtextdomain (PACKAGE, LOCALEDIR); - textdomain (PACKAGE); + (void) bindtextdomain (PACKAGE, LOCALEDIR); + (void) textdomain (PACKAGE); - lineno = 0; - getargs(argc, argv); + uniqstrs_new (); - /* Be ready to clean up if we exit.*/ - atexit (done); + getargs (argc, argv); - openfiles(); + timevar_report = trace_flag & trace_time; + init_timevar (); + timevar_start (TV_TOTAL); - /* 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 (complain_message_count) - exit (1); + if (trace_flag & trace_bitsets) + bitset_stats_enable (); - /* find useless nonterminals and productions and reduce the grammar. In - file reduce.c */ - reduce_grammar(); + muscle_init (); - /* record other info about the grammar. In files derives and nullable. */ - set_derives(); - set_nullable(); + /* 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. */ - /* convert to nondeterministic finite state machine. In file LR0. - See state.h for more info. */ - generate_states(); + timevar_push (TV_READER); + reader (); + timevar_pop (TV_READER); - /* make it deterministic. In file lalr. */ - lalr(); + if (complaint_issued) + goto finish; - /* 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(); + /* Find useless nonterminals and productions and reduce the grammar. */ + timevar_push (TV_REDUCE); + reduce_grammar (); + timevar_pop (TV_REDUCE); - /* print information about results, if requested. In file print. */ - if (verboseflag) - verbose(); - else - terse(); + /* Record other info about the grammar. In files derives and + nullable. */ + timevar_push (TV_SETS); + derives_compute (); + nullable_compute (); + timevar_pop (TV_SETS); - /* output the tables and the parser to ftable. In file output. */ - output(); + /* 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); - finalize_conflicts(); - free_derives(); + /* 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); + } - exit (complain_message_count ? 1 : 0); -} - -/* functions to report errors which prevent a parser from being generated */ + /* 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); -/* Return a string containing a printable version of C: - either C itself, or the corresponding \DDD code. */ + if (trace_flag & trace_bitsets) + bitset_stats_dump (stderr); -char * -printable_version (int c) -{ - static char buf[10]; - if (c < ' ' || c >= '\177') - sprintf(buf, "\\%o", c); - else - { - buf[0] = c; - buf[1] = '\0'; - } - return buf; -} + finish: -/* Abort for an internal error denoted by string S. */ + /* Stop timing and print the times. */ + timevar_stop (TV_TOTAL); + timevar_print (stderr); -void -berror (const char *s) -{ - fprintf (stderr, _("%s: internal error: %s\n"), program_name, s); - abort(); + return complaint_issued ? EXIT_FAILURE : EXIT_SUCCESS; }