File: [local] / src / usr.bin / yacc / main.c (download)
Revision 1.34, Sun May 24 17:31:54 2020 UTC (3 years, 11 months ago) by espie
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, OPENBSD_7_0_BASE, OPENBSD_7_0, OPENBSD_6_9_BASE, OPENBSD_6_9, OPENBSD_6_8_BASE, OPENBSD_6_8, HEAD Changes since 1.33: +1 -9 lines
done() is no longer needed
okay millert@
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/* $OpenBSD: main.c,v 1.34 2020/05/24 17:31:54 espie 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 <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 *code_file_name;
char *defines_file_name;
char *input_file_name = "";
char *output_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 usage(void);
void getargs(int, char *[]);
void create_file_names(void);
void open_files(void);
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;
}
void *
allocate(size_t n)
{
void *v;
v = NULL;
if (n) {
v = calloc(1, n);
if (!v)
no_space();
}
return (v);
}
void
create_file_names(void)
{
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();
}
}
FILE *
create_temp(void)
{
FILE *f;
f = tmpfile();
if (f == NULL)
tempfile_error();
return f;
}
void
open_files(void)
{
create_file_names();
if (input_file == NULL) {
input_file = fopen(input_file_name, "r");
if (input_file == NULL)
open_error(input_file_name);
}
action_file = create_temp();
text_file = create_temp();
if (vflag) {
verbose_file = fopen(verbose_file_name, "w");
if (verbose_file == NULL)
open_error(verbose_file_name);
}
if (dflag) {
defines_file = fopen(defines_file_name, "w");
if (defines_file == NULL)
open_write_error(defines_file_name);
union_file = create_temp();
}
output_file = fopen(output_file_name, "w");
if (output_file == NULL)
open_error(output_file_name);
if (rflag) {
code_file = fopen(code_file_name, "w");
if (code_file == NULL)
open_error(code_file_name);
} else
code_file = output_file;
}
int
main(int argc, char *argv[])
{
if (pledge("stdio rpath wpath cpath", NULL) == -1)
fatal("pledge: invalid arguments");
getargs(argc, argv);
open_files();
reader();
lr0();
lalr();
make_parser();
verbose();
output();
return (0);
}