OpenBSD-4.6/usr.bin/yacc/main.c
/* $OpenBSD: main.c,v 1.22 2009/05/01 10:41:05 chl 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.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)main.c 5.5 (Berkeley) 5/24/93";
#else
static char rcsid[] = "$OpenBSD: main.c,v 1.22 2009/05/01 10:41:05 chl Exp $";
#endif
#endif /* not lint */
#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);
}