source: trunk/yacc/main.c@ 3188

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Robert Paul Corbett.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if 0
#ifndef lint
static char sccsid[] = "@(#)main.c      5.5 (Berkeley) 5/24/93";
#endif
#endif

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/yacc/main.c,v 1.22 2004/03/05 02:05:56 wes Exp $");

#include <paths.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "defs.h"

char dflag;
char lflag;
char rflag;
char tflag;
char vflag;

const char *symbol_prefix;
const char *file_prefix = "y";
char temp_form[] = "yacc.XXXXXXXXXXX";

int lineno;
int outline;

char *action_file_name;
char *code_file_name;
char *defines_file_name;
const char *input_file_name = "";
char *output_file_name;
char *text_file_name;
char *union_file_name;
char *verbose_file_name;

FILE *action_file;      /*  a temp file, used to save actions associated    */
                        /*  with rules until the parser is written          */
FILE *code_file;        /*  y.code.c (used when the -r option is specified) */
FILE *defines_file;     /*  y.tab.h                                         */
FILE *input_file;       /*  the input file                                  */
FILE *output_file;      /*  y.tab.c                                         */
FILE *text_file;        /*  a temp file, used to save text until all        */
                        /*  symbols have been defined                       */
FILE *union_file;       /*  a temp file, used to save the union             */
                        /*  definition until all symbol have been           */
                        /*  defined                                         */
FILE *verbose_file;     /*  y.output                                        */

int nitems;
int nrules;
int nsyms;
int ntokens;
int nvars;

int   start_symbol;
char  **symbol_name;
short *symbol_value;
short *symbol_prec;
char  *symbol_assoc;

short *ritem;
short *rlhs;
short *rrhs;
short *rprec;
char  *rassoc;
short **derives;
char *nullable;

static void create_file_names(void);
static void getargs(int, char **);
static void onintr(int);
static void open_files(void);
static void set_signals(void);
static void usage(void);

volatile sig_atomic_t sigdie;

__dead2 void
done(k)
int k;
{
    if (action_file) { fclose(action_file); unlink(action_file_name); }
    if (text_file) { fclose(text_file); unlink(text_file_name); }
    if (union_file) { fclose(union_file); unlink(union_file_name); }
    if (sigdie) { _exit(k); }
    exit(k);
}


static void
onintr(signo)
        int signo __unused;
{
    sigdie = 1;
    done(1);
}


static void
set_signals()
{
#ifdef SIGINT
    if (signal(SIGINT, SIG_IGN) != SIG_IGN)
        signal(SIGINT, onintr);
#endif
#ifdef SIGTERM
    if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
        signal(SIGTERM, onintr);
#endif
#ifdef SIGHUP
    if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
        signal(SIGHUP, onintr);
#endif
}


static void
usage()
{
    fprintf(stderr, "%s\n%s\n",
                "usage: yacc [-dlrtv] [-b file_prefix] [-o output_filename]",
                "            [-p symbol_prefix] filename");
    exit(1);
}


static void
getargs(argc, argv)
int argc;
char *argv[];
{
    int ch;

    while ((ch = getopt(argc, argv, "b:dlo:p:rtv")) != -1)
    {
        switch (ch)
        {
        case 'b':
            file_prefix = optarg;
            break;

        case 'd':
            dflag = 1;
            break;

        case 'l':
            lflag = 1;
            break;

        case 'o':
            output_file_name = optarg;
            break;

        case 'p':
            symbol_prefix = optarg;