mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-03-09 20:33:03 +00:00
Initial revision
This commit is contained in:
Richard M. Stallman
394
src/files.c
Normal file
394
src/files.c
Normal file
@@ -0,0 +1,394 @@
|
||||
/* Open and close files for bison,
|
||||
Copyright (C) 1984, 1986, 1989 Free Software Foundation, Inc.
|
||||
|
||||
This file is part of Bison, the GNU Compiler Compiler.
|
||||
|
||||
Bison is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 2, or (at your option)
|
||||
any later version.
|
||||
|
||||
Bison is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with Bison; see the file COPYING. If not, write to
|
||||
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||||
|
||||
|
||||
#ifdef VMS
|
||||
#include <ssdef.h>
|
||||
#define unlink delete
|
||||
#ifndef XPFILE
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||||
#define XPFILE "GNU_BISON:[000000]BISON.SIMPLE"
|
||||
#endif
|
||||
#ifndef XPFILE1
|
||||
#define XPFILE1 "GNU_BISON:[000000]BISON.HAIRY"
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#include <stdio.h>
|
||||
#include "system.h"
|
||||
#include "files.h"
|
||||
#include "new.h"
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||||
#include "gram.h"
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||||
|
||||
FILE *finput = NULL;
|
||||
FILE *foutput = NULL;
|
||||
FILE *fdefines = NULL;
|
||||
FILE *ftable = NULL;
|
||||
FILE *fattrs = NULL;
|
||||
FILE *fguard = NULL;
|
||||
FILE *faction = NULL;
|
||||
FILE *fparser = NULL;
|
||||
|
||||
/* File name specified with -o for the output file, or 0 if no -o. */
|
||||
char *spec_outfile;
|
||||
|
||||
char *infile;
|
||||
char *outfile;
|
||||
char *defsfile;
|
||||
char *tabfile;
|
||||
char *attrsfile;
|
||||
char *guardfile;
|
||||
char *actfile;
|
||||
char *tmpattrsfile;
|
||||
char *tmptabfile;
|
||||
char *tmpdefsfile;
|
||||
|
||||
extern char *mktemp(); /* So the compiler won't complain */
|
||||
extern char *getenv();
|
||||
extern void perror();
|
||||
FILE *tryopen(); /* This might be a good idea */
|
||||
void done();
|
||||
|
||||
extern char *program_name;
|
||||
extern int verboseflag;
|
||||
extern int definesflag;
|
||||
int fixed_outfiles = 0;
|
||||
|
||||
|
||||
char*
|
||||
stringappend(string1, end1, string2)
|
||||
char *string1;
|
||||
int end1;
|
||||
char *string2;
|
||||
{
|
||||
register char *ostring;
|
||||
register char *cp, *cp1;
|
||||
register int i;
|
||||
|
||||
cp = string2; i = 0;
|
||||
while (*cp++) i++;
|
||||
|
||||
ostring = NEW2(i+end1+1, char);
|
||||
|
||||
cp = ostring;
|
||||
cp1 = string1;
|
||||
for (i = 0; i < end1; i++)
|
||||
*cp++ = *cp1++;
|
||||
|
||||
cp1 = string2;
|
||||
while (*cp++ = *cp1++) ;
|
||||
|
||||
return ostring;
|
||||
}
|
||||
|
||||
|
||||
/* JF this has been hacked to death. Nowaday it sets up the file names for
|
||||
the output files, and opens the tmp files and the parser */
|
||||
void
|
||||
openfiles()
|
||||
{
|
||||
char *name_base;
|
||||
register char *cp;
|
||||
char *filename;
|
||||
int base_length;
|
||||
int short_base_length;
|
||||
|
||||
#ifdef VMS
|
||||
char *tmp_base = "sys$scratch:b_";
|
||||
#else
|
||||
char *tmp_base = "/tmp/b.";
|
||||
#endif
|
||||
int tmp_len;
|
||||
|
||||
#ifdef MSDOS
|
||||
tmp_base = getenv ("TMP");
|
||||
if (tmp_base == 0)
|
||||
tmp_base = "";
|
||||
strlwr (infile);
|
||||
#endif /* MSDOS */
|
||||
|
||||
tmp_len = strlen (tmp_base);
|
||||
|
||||
if (spec_outfile)
|
||||
{
|
||||
/* -o was specified. The precise -o name will be used for ftable.
|
||||
For other output files, remove the ".c" or ".tab.c" suffix. */
|
||||
name_base = spec_outfile;
|
||||
#ifdef MSDOS
|
||||
strlwr (name_base);
|
||||
#endif /* MSDOS */
|
||||
/* BASE_LENGTH includes ".tab" but not ".c". */
|
||||
base_length = strlen (name_base);
|
||||
if (!strcmp (name_base + base_length - 2, ".c"))
|
||||
base_length -= 2;
|
||||
/* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */
|
||||
short_base_length = base_length;
|
||||
if (!strncmp (name_base + short_base_length - 4, ".tab", 4))
|
||||
short_base_length -= 4;
|
||||
else if (!strncmp (name_base + short_base_length - 4, "_tab", 4))
|
||||
short_base_length -= 4;
|
||||
}
|
||||
else if (spec_file_prefix)
|
||||
{
|
||||
/* -b was specified. Construct names from it. */
|
||||
/* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */
|
||||
short_base_length = strlen (spec_file_prefix);
|
||||
/* Count room for `.tab'. */
|
||||
base_length = short_base_length + 4;
|
||||
name_base = (char *) mallocate (base_length + 1);
|
||||
/* Append `.tab'. */
|
||||
strcpy (name_base, spec_file_prefix);
|
||||
#ifdef VMS
|
||||
strcat (name_base, "_tab");
|
||||
#else
|
||||
strcat (name_base, ".tab");
|
||||
#endif
|
||||
#ifdef MSDOS
|
||||
strlwr (name_base);
|
||||
#endif /* MSDOS */
|
||||
}
|
||||
else
|
||||
{
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||||
/* -o was not specified; compute output file name from input
|
||||
or use y.tab.c, etc., if -y was specified. */
|
||||
|
||||
name_base = fixed_outfiles ? "y.y" : infile;
|
||||
|
||||
/* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any. */
|
||||
|
||||
base_length = strlen (name_base);
|
||||
if (!strcmp (name_base + base_length - 2, ".y"))
|
||||
base_length -= 2;
|
||||
short_base_length = base_length;
|
||||
|
||||
#ifdef VMS
|
||||
name_base = stringappend(name_base, short_base_length, "_tab");
|
||||
#else
|
||||
#ifdef MSDOS
|
||||
name_base = stringappend(name_base, short_base_length, "_tab");
|
||||
#else
|
||||
name_base = stringappend(name_base, short_base_length, ".tab");
|
||||
#endif /* not MSDOS */
|
||||
#endif
|
||||
base_length = short_base_length + 4;
|
||||
}
|
||||
|
||||
finput = tryopen(infile, "r");
|
||||
|
||||
filename = getenv("BISON_SIMPLE");
|
||||
#ifdef MSDOS
|
||||
/* File doesn't exist in current directory; try in INIT directory. */
|
||||
cp = getenv("INIT");
|
||||
if (filename == 0 && cp != 0)
|
||||
{
|
||||
filename = malloc(strlen(cp) + strlen(PFILE) + 2);
|
||||
strcpy(filename, cp);
|
||||
cp = filename + strlen(filename);
|
||||
*cp++ = '/';
|
||||
strcpy(cp, PFILE);
|
||||
}
|
||||
#endif /* MSDOS */
|
||||
fparser = tryopen(filename ? filename : PFILE, "r");
|
||||
|
||||
if (verboseflag)
|
||||
{
|
||||
#ifdef MSDOS
|
||||
outfile = stringappend(name_base, short_base_length, ".out");
|
||||
#else
|
||||
/* We used to use just .out if spec_name_prefix (-p) was used,
|
||||
but that conflicts with Posix. */
|
||||
outfile = stringappend(name_base, short_base_length, ".output");
|
||||
#endif
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||||
foutput = tryopen(outfile, "w");
|
||||
}
|
||||
|
||||
#ifdef MSDOS
|
||||
actfile = mktemp(stringappend(tmp_base, tmp_len, "acXXXXXX"));
|
||||
tmpattrsfile = mktemp(stringappend(tmp_base, tmp_len, "atXXXXXX"));
|
||||
tmptabfile = mktemp(stringappend(tmp_base, tmp_len, "taXXXXXX"));
|
||||
tmpdefsfile = mktemp(stringappend(tmp_base, tmp_len, "deXXXXXX"));
|
||||
#else
|
||||
actfile = mktemp(stringappend(tmp_base, tmp_len, "act.XXXXXX"));
|
||||
tmpattrsfile = mktemp(stringappend(tmp_base, tmp_len, "attrs.XXXXXX"));
|
||||
tmptabfile = mktemp(stringappend(tmp_base, tmp_len, "tab.XXXXXX"));
|
||||
tmpdefsfile = mktemp(stringappend(tmp_base, tmp_len, "defs.XXXXXX"));
|
||||
#endif /* not MSDOS */
|
||||
|
||||
faction = tryopen(actfile, "w+");
|
||||
fattrs = tryopen(tmpattrsfile,"w+");
|
||||
ftable = tryopen(tmptabfile, "w+");
|
||||
|
||||
if (definesflag)
|
||||
{
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||||
defsfile = stringappend(name_base, base_length, ".h");
|
||||
fdefines = tryopen(tmpdefsfile, "w+");
|
||||
}
|
||||
|
||||
#ifndef MSDOS
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||||
unlink(actfile);
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||||
unlink(tmpattrsfile);
|
||||
unlink(tmptabfile);
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||||
unlink(tmpdefsfile);
|
||||
#endif
|
||||
|
||||
/* These are opened by `done' or `open_extra_files', if at all */
|
||||
if (spec_outfile)
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||||
tabfile = spec_outfile;
|
||||
else
|
||||
tabfile = stringappend(name_base, base_length, ".c");
|
||||
|
||||
#ifdef VMS
|
||||
attrsfile = stringappend(name_base, short_base_length, "_stype.h");
|
||||
guardfile = stringappend(name_base, short_base_length, "_guard.c");
|
||||
#else
|
||||
#ifdef MSDOS
|
||||
attrsfile = stringappend(name_base, short_base_length, ".sth");
|
||||
guardfile = stringappend(name_base, short_base_length, ".guc");
|
||||
#else
|
||||
attrsfile = stringappend(name_base, short_base_length, ".stype.h");
|
||||
guardfile = stringappend(name_base, short_base_length, ".guard.c");
|
||||
#endif /* not MSDOS */
|
||||
#endif /* not VMS */
|
||||
}
|
||||
|
||||
|
||||
|
||||
/* open the output files needed only for the semantic parser.
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||||
This is done when %semantic_parser is seen in the declarations section. */
|
||||
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||||
void
|
||||
open_extra_files()
|
||||
{
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||||
FILE *ftmp;
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int c;
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||||
char *filename, *cp;
|
||||
|
||||
fclose(fparser);
|
||||
|
||||
filename = (char *) getenv ("BISON_HAIRY");
|
||||
#ifdef MSDOS
|
||||
/* File doesn't exist in current directory; try in INIT directory. */
|
||||
cp = getenv("INIT");
|
||||
if (filename == 0 && cp != 0)
|
||||
{
|
||||
filename = malloc(strlen(cp) + strlen(PFILE1) + 2);
|
||||
strcpy(filename, cp);
|
||||
cp = filename + strlen(filename);
|
||||
*cp++ = '/';
|
||||
strcpy(cp, PFILE1);
|
||||
}
|
||||
#endif
|
||||
fparser= tryopen(filename ? filename : PFILE1, "r");
|
||||
|
||||
/* JF change from inline attrs file to separate one */
|
||||
ftmp = tryopen(attrsfile, "w");
|
||||
rewind(fattrs);
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while((c=getc(fattrs))!=EOF) /* Thank god for buffering */
|
||||
putc(c,ftmp);
|
||||
fclose(fattrs);
|
||||
fattrs=ftmp;
|
||||
|
||||
fguard = tryopen(guardfile, "w");
|
||||
|
||||
}
|
||||
|
||||
/* JF to make file opening easier. This func tries to open file
|
||||
NAME with mode MODE, and prints an error message if it fails. */
|
||||
FILE *
|
||||
tryopen(name, mode)
|
||||
char *name;
|
||||
char *mode;
|
||||
{
|
||||
FILE *ptr;
|
||||
|
||||
ptr = fopen(name, mode);
|
||||
if (ptr == NULL)
|
||||
{
|
||||
fprintf(stderr, "%s: ", program_name);
|
||||
perror(name);
|
||||
done(2);
|
||||
}
|
||||
return ptr;
|
||||
}
|
||||
|
||||
void
|
||||
done(k)
|
||||
int k;
|
||||
{
|
||||
if (faction)
|
||||
fclose(faction);
|
||||
|
||||
if (fattrs)
|
||||
fclose(fattrs);
|
||||
|
||||
if (fguard)
|
||||
fclose(fguard);
|
||||
|
||||
if (finput)
|
||||
fclose(finput);
|
||||
|
||||
if (fparser)
|
||||
fclose(fparser);
|
||||
|
||||
if (foutput)
|
||||
fclose(foutput);
|
||||
|
||||
/* JF write out the output file */
|
||||
if (k == 0 && ftable)
|
||||
{
|
||||
FILE *ftmp;
|
||||
register int c;
|
||||
|
||||
ftmp=tryopen(tabfile, "w");
|
||||
rewind(ftable);
|
||||
while((c=getc(ftable)) != EOF)
|
||||
putc(c,ftmp);
|
||||
fclose(ftmp);
|
||||
fclose(ftable);
|
||||
|
||||
if (definesflag)
|
||||
{
|
||||
ftmp = tryopen(defsfile, "w");
|
||||
fflush(fdefines);
|
||||
rewind(fdefines);
|
||||
while((c=getc(fdefines)) != EOF)
|
||||
putc(c,ftmp);
|
||||
fclose(ftmp);
|
||||
fclose(fdefines);
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef VMS
|
||||
if (faction)
|
||||
delete(actfile);
|
||||
if (fattrs)
|
||||
delete(tmpattrsfile);
|
||||
if (ftable)
|
||||
delete(tmptabfile);
|
||||
if (k==0) sys$exit(SS$_NORMAL);
|
||||
sys$exit(SS$_ABORT);
|
||||
#else
|
||||
#ifdef MSDOS
|
||||
if (actfile) unlink(actfile);
|
||||
if (tmpattrsfile) unlink(tmpattrsfile);
|
||||
if (tmptabfile) unlink(tmptabfile);
|
||||
if (tmpdefsfile) unlink(tmpdefsfile);
|
||||
#endif /* MSDOS */
|
||||
exit(k);
|
||||
#endif /* not VMS */
|
||||
}
|
||||
140
src/main.c
Normal file
140
src/main.c
Normal file
@@ -0,0 +1,140 @@
|
||||
/* Top level entry point of bison,
|
||||
Copyright (C) 1984, 1986, 1989 Free Software Foundation, Inc.
|
||||
|
||||
This file is part of Bison, the GNU Compiler Compiler.
|
||||
|
||||
Bison is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 2, or (at your option)
|
||||
any later version.
|
||||
|
||||
Bison is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with Bison; see the file COPYING. If not, write to
|
||||
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||||
|
||||
|
||||
#include <stdio.h>
|
||||
#include "system.h"
|
||||
#include "machine.h" /* JF for MAXSHORT */
|
||||
|
||||
extern int lineno;
|
||||
extern int verboseflag;
|
||||
|
||||
/* Nonzero means failure has been detected; don't write a parser file. */
|
||||
int failure;
|
||||
|
||||
/* The name this program was run with, for messages. */
|
||||
char *program_name;
|
||||
|
||||
extern void getargs(), openfiles(), reader(), reduce_grammar();
|
||||
extern void set_derives(), set_nullable(), generate_states();
|
||||
extern void lalr(), initialize_conflicts(), verbose(), terse();
|
||||
extern void output(), done();
|
||||
|
||||
|
||||
/* VMS complained about using `int'. */
|
||||
int
|
||||
main(argc, argv)
|
||||
int argc;
|
||||
char *argv[];
|
||||
{
|
||||
program_name = argv[0];
|
||||
failure = 0;
|
||||
lineno = 0;
|
||||
getargs(argc, argv);
|
||||
openfiles();
|
||||
|
||||
/* read the input. Copy some parts of it to fguard, faction, ftable and fattrs.
|
||||
In file reader.c.
|
||||
The other parts are recorded in the grammar; see gram.h. */
|
||||
reader();
|
||||
|
||||
/* find useless nonterminals and productions and reduce the grammar. In
|
||||
file reduce.c */
|
||||
reduce_grammar();
|
||||
|
||||
/* record other info about the grammar. In files derives and nullable. */
|
||||
set_derives();
|
||||
set_nullable();
|
||||
|
||||
/* convert to nondeterministic finite state machine. In file LR0.
|
||||
See state.h for more info. */
|
||||
generate_states();
|
||||
|
||||
/* make it deterministic. In file lalr. */
|
||||
lalr();
|
||||
|
||||
/* Find and record any conflicts: places where one token of lookahead is not
|
||||
enough to disambiguate the parsing. In file conflicts.
|
||||
Currently this does not do anything to resolve them;
|
||||
the trivial form of conflict resolution that exists is done in output. */
|
||||
initialize_conflicts();
|
||||
|
||||
/* print information about results, if requested. In file print. */
|
||||
if (verboseflag)
|
||||
verbose();
|
||||
else
|
||||
terse();
|
||||
|
||||
/* output the tables and the parser to ftable. In file output. */
|
||||
output();
|
||||
done(failure);
|
||||
}
|
||||
|
||||
/* functions to report errors which prevent a parser from being generated */
|
||||
|
||||
void
|
||||
fatal(s)
|
||||
char *s;
|
||||
{
|
||||
extern char *infile;
|
||||
|
||||
if (infile == 0)
|
||||
fprintf(stderr, "fatal error: %s\n", s);
|
||||
else
|
||||
fprintf(stderr, "\"%s\", line %d: %s\n", infile, lineno, s);
|
||||
done(1);
|
||||
}
|
||||
|
||||
|
||||
/* JF changed to accept/deal with variable args.
|
||||
DO NOT change this to use varargs. It will appear to work
|
||||
but will break on systems that don't have the necessary library
|
||||
functions. This is the ONLY safe way to write such a function. */
|
||||
/*VARARGS1*/
|
||||
|
||||
void
|
||||
fatals(fmt,x1,x2,x3,x4,x5,x6,x7,x8)
|
||||
char *fmt;
|
||||
{
|
||||
char buffer[200];
|
||||
|
||||
sprintf(buffer, fmt, x1,x2,x3,x4,x5,x6,x7,x8);
|
||||
fatal(buffer);
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
toomany(s)
|
||||
char *s;
|
||||
{
|
||||
char buffer[200];
|
||||
|
||||
/* JF new msg */
|
||||
sprintf(buffer, "limit of %d exceeded, too many %s", MAXSHORT, s);
|
||||
fatal(buffer);
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
berror(s)
|
||||
char *s;
|
||||
{
|
||||
fprintf(stderr, "internal error, %s\n", s);
|
||||
abort();
|
||||
}
|
||||
Reference in New Issue
Block a user