Return to main.c CVS log

Up to [local] / src / usr.bin / yacc

rcsid[] and sccsid[] and copyright[] are essentially unmaintained (and
unmaintainable).  these days, people use source.  these id's do not provide
any benefit, and do hurt the small install media
(the 33,000 line diff is essentially mechanical)
ok with the idea millert, ok dms

/*	$OpenBSD: main.c,v 1.23 2009/10/27 23:59:50 deraadt Exp $	*/
/*	$NetBSD: main.c,v 1.5 1996/03/19 03:21:38 jtc Exp $	*/

/*
 * 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. 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.
 */

#include <sys/types.h>
#include <fcntl.h>
#include <paths.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include "defs.h"

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

char *symbol_prefix;
char *file_prefix = "y";

int lineno;
int outline;

int explicit_file_name;

char *action_file_name;
char *code_file_name;
char *defines_file_name;
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;

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

volatile sig_atomic_t sigdie;

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


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


void
set_signals(void)
{
#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
}


void
usage(void)
{
    fprintf(stderr, "usage: %s [-dlrtv] [-b file_prefix] [-o output_file] [-p symbol_prefix] file\n", __progname);
    exit(1);
}


void
getargs(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;
	    explicit_file_name = 1;
	    break;
	    
	case 'p':
	    symbol_prefix = optarg;
	    break;
	    
	case 'r':
	    rflag = 1;
	    break;

	case 't':
	    tflag = 1;
	    break;

	case 'v':
	    vflag = 1;
	    break;

	default:
	    usage();
	}
    }
    argc -= optind;
    argv += optind;

    if (argc != 1)
	usage();
    if (strcmp(*argv, "-") == 0)
	input_file = stdin;
    else
	input_file_name = *argv;
}


char *
allocate(unsigned int n)
{
    char *p;

    p = NULL;
    if (n)
    {
	p = CALLOC(1, n);
	if (!p) no_space();
    }
    return (p);
}

#define TEMPNAME(s, c, d, l)	\
	(asprintf(&(s), "%.*s/yacc.%xXXXXXXXXXX", (int)(l), (d), (c)))

void
create_file_names(void)
{
    size_t len;
    char *tmpdir;

    if ((tmpdir = getenv("TMPDIR")) == NULL || *tmpdir == '\0')
	tmpdir = _PATH_TMP;

    len = strlen(tmpdir);
    if (tmpdir[len-1] == '/')
	len--;

    if (TEMPNAME(action_file_name, 'a', tmpdir, len) == -1 ||
	TEMPNAME(text_file_name, 'r', tmpdir, len) == -1 ||
	TEMPNAME(union_file_name, 'u', tmpdir, len) == -1)
	no_space();

    if (output_file_name == NULL)
    {
	if (asprintf(&output_file_name, "%s%s", file_prefix, OUTPUT_SUFFIX)
	    == -1)
	    no_space();
    }

    if (rflag) {
	if (asprintf(&code_file_name, "%s%s", file_prefix, CODE_SUFFIX) == -1)
	    no_space();
    } else
	code_file_name = output_file_name;

    if (dflag)
    {
        if (explicit_file_name)
	{
	    char *suffix;

	    defines_file_name = strdup(output_file_name);
	    if (defines_file_name == 0)
	        no_space();

            /* does the output_file_name have a known suffix */
            if ((suffix = strrchr(output_file_name, '.')) != 0 &&
                (!strcmp(suffix, ".c") ||	/* good, old-fashioned C */
                 !strcmp(suffix, ".C") ||	/* C++, or C on Windows */
                 !strcmp(suffix, ".cc") ||	/* C++ */
                 !strcmp(suffix, ".cxx") ||	/* C++ */
                 !strcmp(suffix, ".cpp")))	/* C++ (Windows) */
            {
                strncpy(defines_file_name, output_file_name,
                    suffix - output_file_name + 1);
                defines_file_name[suffix - output_file_name + 1] = 'h';
                defines_file_name[suffix - output_file_name + 2] = '\0';
            } else {
                fprintf(stderr,"%s: suffix of output file name %s"
                    " not recognized, no -d file generated.\n",
                    __progname, output_file_name);
                dflag = 0;
                free(defines_file_name);
                defines_file_name = 0;
            }
	}
	else
	{
	    if (asprintf(&defines_file_name, "%s%s", file_prefix,
		DEFINES_SUFFIX) == -1)
	        no_space();
	}
    }

    if (vflag)
    {
	if (asprintf(&verbose_file_name, "%s%s", file_prefix,
	    VERBOSE_SUFFIX) == -1)
	    no_space();
    }
}


void
open_files(void)
{
    int fd;

    create_file_names();

    if (input_file == 0)
    {
	input_file = fopen(input_file_name, "r");
	if (input_file == 0)
	    open_error(input_file_name);
    }

    fd = mkstemp(action_file_name);
    if (fd == -1 || (action_file = fdopen(fd, "w")) == NULL)
	open_error(action_file_name);

    fd = mkstemp(text_file_name);
    if (fd == -1 || (text_file = fdopen(fd, "w")) == NULL)
	open_error(text_file_name);

    if (vflag)
    {
	verbose_file = fopen(verbose_file_name, "w");
	if (verbose_file == 0)
	    open_error(verbose_file_name);
    }

    if (dflag)
    {
	defines_file = fopen(defines_file_name, "w");
	if (defines_file == NULL)
	    open_write_error(defines_file_name);
	fd = mkstemp(union_file_name);
	if (fd == -1 || (union_file = fdopen(fd, "w")) == NULL)
	    open_error(union_file_name);
    }

    output_file = fopen(output_file_name, "w");
    if (output_file == 0)
	open_error(output_file_name);

    if (rflag)
    {
	code_file = fopen(code_file_name, "w");
	if (code_file == 0)
	    open_error(code_file_name);
    }
    else
	code_file = output_file;
}


int
main(int argc, char *argv[])
{
    set_signals();
    getargs(argc, argv);
    open_files();
    reader();
    lr0();
    lalr();
    make_parser();
    verbose();
    output();
    done(0);
    /*NOTREACHED*/
    return (0);
}