X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/ceed8467b7db3615d3c9bfa9f3e5525d54c6a161..e9f87b5b7df2e328d2e4196d276c0d96594c906b:/src/main.c diff --git a/src/main.c b/src/main.c index f3141d4c..55dca624 100644 --- a/src/main.c +++ b/src/main.c @@ -1,5 +1,5 @@ /* Top level entry point of bison, - Copyright (C) 1984, 1986, 1989, 1992, 1995, 2000 + Copyright 1984, 1986, 1989, 1992, 1995, 2000, 2001 Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. @@ -24,36 +24,23 @@ #include "getargs.h" #include "files.h" #include "complain.h" - -#if 0 /* XXX currently unused. */ -/* Nonzero means failure has been detected; don't write a parser file. */ -static int failure; -#endif +#include "derives.h" +#include "output.h" +#include "reader.h" +#include "lalr.h" +#include "reduce.h" +#include "nullable.h" +#include "print.h" +#include "LR0.h" +#include "conflicts.h" +#include "print_graph.h" +#include "muscle_tab.h" +#include "symtab.h" +#include "lex.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 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 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)); -extern void output PARAMS((void)); - - -/* VMS complained about using `int'. */ - int main (int argc, char *argv[]) { @@ -63,81 +50,71 @@ main (int argc, char *argv[]) textdomain (PACKAGE); lineno = 0; - getargs(argc, argv); - - /* Be ready to clean up if we exit.*/ - atexit (done); + getargs (argc, argv); - openfiles(); + muscle_init (); - /* 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. */ + /* 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); - /* find useless nonterminals and productions and reduce the grammar. In - file reduce.c */ - reduce_grammar(); + /* Find useless nonterminals and productions and reduce the grammar. */ + reduce_grammar (); - /* 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. */ + set_derives (); + set_nullable (); - /* convert to nondeterministic finite state machine. In file LR0. + /* Convert to nondeterministic finite state machine. In file LR0. See state.h for more info. */ - generate_states(); + generate_states (); /* make it deterministic. In file lalr. */ - 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(); + /* 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. */ + solve_conflicts (); + conflicts_print (); - /* print information about results, if requested. In file print. */ - if (verboseflag) - verbose(); - else - terse(); + /* Output file names. */ + compute_output_file_names (); - /* output the tables and the parser to ftable. In file output. */ - output(); + /* Output the detailed report on the grammar. */ + if (verbose_flag) + print_results (); - finalize_conflicts(); - free_nullable(); - free_derives(); + /* Stop if there were errors, to avoid trashing previous output + files. */ + if (complain_message_count) + exit (1); - exit (complain_message_count ? 1 : 0); -} - -/* functions to report errors which prevent a parser from being generated */ + /* Output the VCG graph. */ + if (graph_flag) + print_graph (); + /* Output the tables and the parser to ftable. In file output. */ + output (); -/* Return a string containing a printable version of C: - either C itself, or the corresponding \DDD code. */ + /* Free the symbol table data structure. */ + free_symtab (); -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; -} + reduce_free (); + free_conflicts (); + free_nullable (); + free_derives (); -/* Abort for an internal error denoted by string S. */ + /* If using alloca.c, flush the alloca'ed memory for the benefit of + people running Bison as a library in IDEs. */ +#if C_ALLOCA + alloca (0); +#endif -void -berror (const char *s) -{ - fprintf (stderr, _("%s: internal error: %s\n"), program_name, s); - abort(); + return complain_message_count ? EXIT_FAILURE : EXIT_SUCCESS; }