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cc84fd5dc7
* src/main.c, src/derives.h: Use it. Formatting changes. * src/Makefile.am (noinst_HEADERS): Adjust.
142 lines
3.7 KiB
C
142 lines
3.7 KiB
C
/* Top level entry point of bison,
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Copyright (C) 1984, 1986, 1989, 1992, 1995, 2000
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Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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Bison is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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Bison is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bison; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "system.h"
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#include "getargs.h"
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#include "files.h"
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#include "complain.h"
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#include "derives.h"
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#if 0 /* XXX currently unused. */
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/* Nonzero means failure has been detected; don't write a parser file. */
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static int failure;
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#endif
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/* The name this program was run with, for messages. */
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char *program_name;
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extern char *printable_version PARAMS ((int));
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extern void berror PARAMS ((const char *));
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extern void openfiles PARAMS ((void));
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extern void reader PARAMS ((void));
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extern void reduce_grammar PARAMS ((void));
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extern void set_nullable PARAMS ((void));
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extern void free_nullable PARAMS ((void));
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extern void generate_states PARAMS ((void));
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extern void lalr PARAMS ((void));
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extern void initialize_conflicts PARAMS ((void));
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extern void finalize_conflicts PARAMS ((void));
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extern void verbose PARAMS ((void));
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extern void terse PARAMS ((void));
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extern void output PARAMS ((void));
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/* VMS complained about using `int'. */
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int
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main (int argc, char *argv[])
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{
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program_name = argv[0];
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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lineno = 0;
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getargs (argc, argv);
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/* Be ready to clean up if we exit. */
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atexit (done);
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openfiles ();
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/* Read the input. Copy some parts of it to FGUARD, FACTION, FTABLE
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and FATTRS. In file reader.c. The other parts are recorded in
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the grammar; see gram.h. */
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reader ();
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if (complain_message_count)
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exit (1);
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/* find useless nonterminals and productions and reduce the grammar. In
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file reduce.c */
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reduce_grammar ();
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/* record other info about the grammar. In files derives and nullable. */
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set_derives ();
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set_nullable ();
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/* convert to nondeterministic finite state machine. In file LR0.
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See state.h for more info. */
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generate_states ();
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/* make it deterministic. In file lalr. */
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lalr ();
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/* Find and record any conflicts: places where one token of
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lookahead is not enough to disambiguate the parsing. In file
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conflicts. Also resolve s/r conflicts based on precedence
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declarations. */
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initialize_conflicts ();
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/* Print information about results, if requested. In file print.
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*/
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if (verboseflag)
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verbose ();
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else
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terse ();
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/* Output the tables and the parser to ftable. In file output. */
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output ();
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finalize_conflicts ();
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free_nullable ();
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free_derives ();
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exit (complain_message_count ? 1 : 0);
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}
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/* Return a string containing a printable version of C:
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either C itself, or the corresponding \DDD code. */
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char *
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printable_version (int c)
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{
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static char buf[10];
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if (c < ' ' || c >= '\177')
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sprintf (buf, "\\%o", c);
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else
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{
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buf[0] = c;
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buf[1] = '\0';
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}
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return buf;
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}
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/* Abort for an internal error denoted by string S. */
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void
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berror (const char *s)
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{
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fprintf (stderr, _("%s: internal error: %s\n"), program_name, s);
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abort ();
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}
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