/* Top level entry point of bison,
- Copyright (C) 1984, 1986, 1989, 1992, 1995 Free Software Foundation, Inc.
+ Copyright 1984, 1986, 1989, 1992, 1995, 2000, 2001
+ Free Software Foundation, Inc.
-This file is part of Bison, the GNU Compiler Compiler.
+ This file is part of Bison, the GNU Compiler Compiler.
-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.
+ 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.
-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 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. */
+ 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 <stdio.h>
#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;
+#include "getargs.h"
+#include "files.h"
+#include "complain.h"
+#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;
-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'. */
-
int
main (int argc, char *argv[])
{
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
- failure = 0;
lineno = 0;
- getargs(argc, argv);
- openfiles();
+ getargs (argc, argv);
+
+ 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. */
- reader();
- if (failure)
- done(failure);
+ /* 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();
-
- /* 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;
-}
-\f
-/* 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
- {
- buf[0] = c;
- buf[1] = '\0';
- }
- return buf;
-}
-
-/* Generate a string from the integer I.
- Return a ptr to internal memory containing the string. */
-
-char *
-int_to_string (int i)
-{
- static char buf[20];
- sprintf(buf, "%d", i);
- return buf;
-}
-
-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. */
-
-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);
-}
+ lalr ();
-/* Print a warning message containing the string for the integer X1.
- The message is given by the format FMT. */
+ /* 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 ();
-void
-warni (char *fmt, int x1)
-{
- warn_banner ();
- fprintf (stderr, fmt, x1);
- fputc ('\n', stderr);
-}
+ /* Output file names. */
+ compute_output_file_names ();
-/* Print a warning message containing the string X1.
- The message is given by the format FMT. */
+ /* Output the detailed report on the grammar. */
+ if (verbose_flag)
+ print_results ();
-void
-warns (char *fmt, char *x1)
-{
- warn_banner ();
- fprintf (stderr, fmt, x1);
- fputc ('\n', stderr);
-}
+ /* Stop if there were errors, to avoid trashing previous output
+ files. */
+ if (complain_message_count)
+ exit (1);
-/* Print a warning message containing the two strings X1 and X2.
- The message is given by the format FMT. */
+ /* Output the VCG graph. */
+ if (graph_flag)
+ print_graph ();
-void
-warnss (char *fmt, char *x1, char *x2)
-{
- warn_banner ();
- fprintf (stderr, fmt, x1, x2);
- fputc ('\n', stderr);
-}
+ /* Output the tables and the parser to ftable. In file output. */
+ output ();
-/* Print a warning message containing the 3 strings X1, X2, X3.
- The message is given by the format FMT. */
+ /* Free the symbol table data structure. */
+ free_symtab ();
-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. */
-
-void
-toomany (char *s)
-{
- fatal_banner ();
- fprintf (stderr, _("too many %s (max %d)"), s, MAXSHORT);
- fputc ('\n', stderr);
- done (1);
-}
+ 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 (char *s)
-{
- fprintf(stderr, _("%s: internal error: %s\n"), program_name, s);
- abort();
+ return complain_message_count ? EXIT_FAILURE : EXIT_SUCCESS;
}
projects / bison.git / blobdiff