365 lines
6.3 KiB
C
365 lines
6.3 KiB
C
#include <signal.h>
|
|
#include "defs.h"
|
|
|
|
char dflag;
|
|
char lflag;
|
|
char rflag;
|
|
char tflag;
|
|
char vflag;
|
|
|
|
char *file_prefix = "y";
|
|
char *myname = "yacc";
|
|
char *temp_form = "yacc.XXXXXXX";
|
|
|
|
int lineno;
|
|
int outline;
|
|
|
|
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;
|
|
|
|
extern char *mktemp();
|
|
extern char *getenv();
|
|
|
|
|
|
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); }
|
|
exit(k);
|
|
}
|
|
|
|
|
|
onintr()
|
|
{
|
|
done(1);
|
|
}
|
|
|
|
|
|
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
|
|
}
|
|
|
|
|
|
usage()
|
|
{
|
|
fprintf(stderr, "usage: %s [-dlrtv] [-b file_prefix] filename\n", myname);
|
|
exit(1);
|
|
}
|
|
|
|
|
|
getargs(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
register int i;
|
|
register char *s;
|
|
|
|
if (argc > 0) myname = argv[0];
|
|
for (i = 1; i < argc; ++i)
|
|
{
|
|
s = argv[i];
|
|
if (*s != '-') break;
|
|
switch (*++s)
|
|
{
|
|
case '\0':
|
|
input_file = stdin;
|
|
if (i + 1 < argc) usage();
|
|
return;
|
|
|
|
case '-':
|
|
++i;
|
|
goto no_more_options;
|
|
|
|
case 'b':
|
|
if (*++s)
|
|
file_prefix = s;
|
|
else if (++i < argc)
|
|
file_prefix = argv[i];
|
|
else
|
|
usage();
|
|
continue;
|
|
|
|
case 'd':
|
|
dflag = 1;
|
|
break;
|
|
|
|
case 'l':
|
|
lflag = 1;
|
|
break;
|
|
|
|
case 'r':
|
|
rflag = 1;
|
|
break;
|
|
|
|
case 't':
|
|
tflag = 1;
|
|
break;
|
|
|
|
case 'v':
|
|
vflag = 1;
|
|
break;
|
|
|
|
default:
|
|
usage();
|
|
}
|
|
|
|
for (;;)
|
|
{
|
|
switch (*++s)
|
|
{
|
|
case '\0':
|
|
goto end_of_option;
|
|
|
|
case 'd':
|
|
dflag = 1;
|
|
break;
|
|
|
|
case 'l':
|
|
lflag = 1;
|
|
break;
|
|
|
|
case 'r':
|
|
rflag = 1;
|
|
break;
|
|
|
|
case 't':
|
|
tflag = 1;
|
|
break;
|
|
|
|
case 'v':
|
|
vflag = 1;
|
|
break;
|
|
|
|
default:
|
|
usage();
|
|
}
|
|
}
|
|
end_of_option:;
|
|
}
|
|
|
|
no_more_options:;
|
|
if (i + 1 != argc) usage();
|
|
input_file_name = argv[i];
|
|
}
|
|
|
|
|
|
char *
|
|
allocate(n)
|
|
unsigned n;
|
|
{
|
|
register char *p;
|
|
|
|
p = NULL;
|
|
if (n)
|
|
{
|
|
p = CALLOC(1, n);
|
|
if (!p) no_space();
|
|
}
|
|
return (p);
|
|
}
|
|
|
|
|
|
create_file_names()
|
|
{
|
|
int i, len;
|
|
char *tmpdir;
|
|
|
|
tmpdir = getenv("TMPDIR");
|
|
if (tmpdir == 0) tmpdir = "/tmp";
|
|
|
|
len = strlen(tmpdir);
|
|
i = len + 13;
|
|
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';
|
|
|
|
mktemp(action_file_name);
|
|
mktemp(text_file_name);
|
|
mktemp(union_file_name);
|
|
|
|
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);
|
|
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);
|
|
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);
|
|
strcpy(verbose_file_name + len, VERBOSE_SUFFIX);
|
|
}
|
|
}
|
|
|
|
|
|
open_files()
|
|
{
|
|
create_file_names();
|
|
|
|
if (input_file == 0)
|
|
{
|
|
input_file = fopen(input_file_name, "r");
|
|
if (input_file == 0)
|
|
open_error(input_file_name);
|
|
}
|
|
|
|
action_file = fopen(action_file_name, "w");
|
|
if (action_file == 0)
|
|
open_error(action_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(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
set_signals();
|
|
getargs(argc, argv);
|
|
open_files();
|
|
reader();
|
|
lr0();
|
|
lalr();
|
|
make_parser();
|
|
verbose();
|
|
output();
|
|
done(0);
|
|
/*NOTREACHED*/
|
|
}
|