FreeBSD-5.3/usr.bin/yacc/main.c
/*
* 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;
break;
case 'r':
rflag = 1;
break;
case 't':
tflag = 1;
break;
case 'v':
vflag = 1;
break;
default:
usage();
}
}
if (optind + 1 != argc)
usage();
if (strcmp(argv[optind], "-") == 0)
input_file = stdin;
else
input_file_name = argv[optind];
}
char *
allocate(n)
unsigned n;
{
char *p;
p = NULL;
if (n)
{
p = CALLOC(1, n);
if (!p) no_space();
}
return (p);
}
static void
create_file_names()
{
int i, len;
const char *tmpdir;
if (!(tmpdir = getenv("TMPDIR")))
tmpdir = _PATH_TMP;
len = strlen(tmpdir);
i = len + strlen(temp_form) + 1;
if (len && tmpdir[len-1] != '/')
++i;
action_file_name = MALLOC(i);
if (action_file_name == 0) no_space();
text_file_name = MALLOC(i);
if (text_file_name == 0) no_space();
union_file_name = MALLOC(i);
if (union_file_name == 0) no_space();
strcpy(action_file_name, tmpdir);
strcpy(text_file_name, tmpdir);
strcpy(union_file_name, tmpdir);
if (len && tmpdir[len - 1] != '/')
{
action_file_name[len] = '/';
text_file_name[len] = '/';
union_file_name[len] = '/';
++len;
}
strcpy(action_file_name + len, temp_form);
strcpy(text_file_name + len, temp_form);
strcpy(union_file_name + len, temp_form);
action_file_name[len + 5] = 'a';
text_file_name[len + 5] = 't';
union_file_name[len + 5] = 'u';
if (output_file_name != 0)
{
file_prefix = output_file_name;
len = strlen(file_prefix);
}
else
{
len = strlen(file_prefix);
output_file_name = MALLOC(len + 7);
if (output_file_name == 0)
no_space();
strcpy(output_file_name, file_prefix);
strcpy(output_file_name + len, OUTPUT_SUFFIX);
}
if (rflag)
{
code_file_name = MALLOC(len + 8);
if (code_file_name == 0)
no_space();
strcpy(code_file_name, file_prefix);
if (file_prefix == output_file_name)
{
/*
* XXX ".tab.c" here is OUTPUT_SUFFIX, but since its length is
* in various magic numbers, don't bother using the macro.
*/
if (len >= 6 && strcmp(code_file_name + len - 6, ".tab.c") == 0)
strcpy(code_file_name + len - 6, CODE_SUFFIX);
else if (len >= 2 && strcmp(code_file_name + len - 2, ".c") == 0)
strcpy(code_file_name + len - 2, CODE_SUFFIX);
else
strcpy(code_file_name + len, CODE_SUFFIX);
}
else
strcpy(code_file_name + len, CODE_SUFFIX);
}
else
code_file_name = output_file_name;
if (dflag)
{
defines_file_name = MALLOC(len + 7);
if (defines_file_name == 0)
no_space();
strcpy(defines_file_name, file_prefix);
if (file_prefix == output_file_name)
{
#define BISON_DEFINES_SUFFIX ".h"
if (len >= 2 && strcmp(defines_file_name + len - 2, ".c") == 0)
strcpy(defines_file_name + len - 2, BISON_DEFINES_SUFFIX);
else
strcpy(defines_file_name + len, BISON_DEFINES_SUFFIX);
}
else
strcpy(defines_file_name + len, DEFINES_SUFFIX);
}
if (vflag)
{
verbose_file_name = MALLOC(len + 8);
if (verbose_file_name == 0)
no_space();
strcpy(verbose_file_name, file_prefix);
if (file_prefix == output_file_name)
{
if (len >= 6 && strcmp(verbose_file_name + len - 6, ".tab.c") == 0)
strcpy(verbose_file_name + len - 6, VERBOSE_SUFFIX);
else if (len >= 2 && strcmp(verbose_file_name + len - 2, ".c") == 0)
strcpy(verbose_file_name + len - 2, VERBOSE_SUFFIX);
else
strcpy(verbose_file_name + len, VERBOSE_SUFFIX);
}
else
strcpy(verbose_file_name + len, VERBOSE_SUFFIX);
}
}
static void
open_files()
{
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 < 0 || (action_file = fdopen(fd, "w")) == NULL) {
if (fd >= 0)
close(fd);
open_error(action_file_name);
}
fd = mkstemp(text_file_name);
if (fd < 0 || (text_file = fdopen(fd, "w")) == NULL) {
if (fd >= 0)
close(fd);
open_error(text_file_name);
}
fd = mkstemp(union_file_name);
if (fd < 0 || (union_file = fdopen(fd, "w")) == NULL) {
if (fd >= 0)
close(fd);
open_error(union_file_name);
}
text_file = fopen(text_file_name, "w");
if (text_file == 0)
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 == 0)
open_error(defines_file_name);
union_file = fopen(union_file_name, "w");
if (union_file == 0)
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);
}