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bison
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files.c
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1992-06-24
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/* 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 1, 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
#define XPFILE "GNU_BISON:[000000]BISON.SIMPLE"
#define XPFILE1 "GNU_BISON:[000000]BISON.HAIRY"
#endif
#include <stdio.h>
#include "files.h"
#include "new.h"
#include "gram.h"
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;
extern char *mktemp(); /* So the compiler won't complain */
extern char *getenv();
FILE *tryopen(); /* This might be a good idea */
void done();
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 = 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;
/* 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 (!strcmp (name_base + short_base_length - 4, ".tab"))
short_base_length -= 4;
else if (!strcmp (name_base + short_base_length - 4, "_tab"))
short_base_length -= 4;
}
else
{
/* -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;
/* Discard any directory names from the input file name
to make the base of the output. */
cp = name_base;
while (*cp)
{
if (*cp == '/')
name_base = cp+1;
cp++;
}
/* 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
name_base = stringappend(name_base, short_base_length, ".tab");
#endif
base_length = short_base_length + 4;
}
finput = tryopen(infile, "r");
filename = getenv ("BISON_SIMPLE");
fparser = tryopen(filename ? filename : PFILE, "r");
if (verboseflag)
{
outfile = stringappend(name_base, short_base_length, ".output");
foutput = tryopen(outfile, "w");
}
if (definesflag)
{
defsfile = stringappend(name_base, base_length, ".h");
fdefines = tryopen(defsfile, "w");
}
actfile = mktemp(stringappend(tmp_base, tmp_len, "act.XXXXXX"));
faction = tryopen(actfile, "w+");
unlink(actfile);
tmpattrsfile = mktemp(stringappend(tmp_base, tmp_len, "attrs.XXXXXX"));
fattrs = tryopen(tmpattrsfile,"w+");
unlink(tmpattrsfile);
tmptabfile = mktemp(stringappend(tmp_base, tmp_len, "tab.XXXXXX"));
ftable = tryopen(tmptabfile, "w+");
unlink(tmptabfile);
/* These are opened by `done' or `open_extra_files', if at all */
if (spec_outfile)
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
attrsfile = stringappend(name_base, short_base_length, ".stype.h");
guardfile = stringappend(name_base, short_base_length, ".guard.c");
#endif
}
/* open the output files needed only for the semantic parser.
This is done when %semantic_parser is seen in the declarations section. */
void
open_extra_files()
{
FILE *ftmp;
int c;
char *filename;
/* JF change open parser file */
fclose(fparser);
filename = (char *) getenv ("BISON_HAIRY");
fparser= tryopen(filename ? filename : PFILE1, "r");
/* JF change from inline attrs file to separate one */
ftmp = tryopen(attrsfile, "w");
rewind(fattrs);
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, "bison: ");
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);
}
#ifdef VMS
delete(actfile);
delete(tmpattrsfile);
delete(tmptabfile);
if (k==0) sys$exit(SS$_NORMAL);
sys$exit(SS$_ABORT);
#else
exit(k);
#endif
}