mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-03-09 20:33:03 +00:00
391 lines
10 KiB
C
391 lines
10 KiB
C
/* Open and close files for bison,
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Copyright 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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Bison is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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Bison is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bison; see the file COPYING. If not, write to the Free
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Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#include "system.h"
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#if defined (VMS) & !defined (__VMS_POSIX)
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# ifndef BISON_SIMPLE
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# define BISON_SIMPLE "GNU_BISON:[000000]BISON.SIMPLE"
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# endif
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# ifndef BISON_HAIRY
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# define BISON_HARIRY "GNU_BISON:[000000]BISON.HAIRY"
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# endif
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#endif
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#if defined (_MSC_VER)
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# ifndef BISON_SIMPLE
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# define BISON_SIMPLE "c:/usr/local/lib/bison.simple"
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# endif
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# ifndef BISON_HAIRY
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# define BISON_HAIRY "c:/usr/local/lib/bison.hairy"
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# endif
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#endif
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#include "getargs.h"
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#include "files.h"
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#include "xalloc.h"
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#include "gram.h"
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#include "complain.h"
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FILE *finput = NULL;
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FILE *foutput = NULL;
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FILE *fguard = NULL;
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FILE *fparser = NULL;
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struct obstack action_obstack;
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struct obstack attrs_obstack;
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struct obstack table_obstack;
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struct obstack defines_obstack;
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/* File name specified with -o for the output file, or 0 if no -o. */
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char *spec_outfile;
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char *infile;
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char *attrsfile;
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static char *outfile;
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static char *defsfile;
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static char *tabfile;
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static char *guardfile;
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static char *actfile;
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extern char *getenv ();
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extern char *program_name;
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static char *
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stringappend (const char *string1, int end1, const char *string2)
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{
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register char *ostring;
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register char *cp;
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register const char *cp1;
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register int i;
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cp1 = string2;
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i = 0;
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while (*cp1++)
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i++;
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ostring = XCALLOC (char, i + end1 + 1);
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cp = ostring;
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cp1 = string1;
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for (i = 0; i < end1; i++)
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*cp++ = *cp1++;
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cp1 = string2;
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while ((*cp++ = *cp1++))
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;
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return ostring;
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}
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/*-----------------------------------------------------------------.
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| Try to open file NAME with mode MODE, and print an error message |
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| if fails. |
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`-----------------------------------------------------------------*/
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static FILE *
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xfopen (const char *name, const char *mode)
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{
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FILE *ptr;
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ptr = fopen (name, mode);
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if (!ptr)
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error (2, errno, _("cannot open file `%s'"), name);
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return ptr;
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}
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/*-------------------------------------------------------------.
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| Try to close file PTR, and print an error message if fails. |
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`-------------------------------------------------------------*/
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static int
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xfclose (FILE *ptr)
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{
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int result;
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if (ptr == NULL)
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return 0;
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result = fclose (ptr);
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if (result == EOF)
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error (2, errno, _("cannot close file"));
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return result;
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}
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/*--------------------------------------------------.
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| Save the content of the obstack OBS in FILENAME. |
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`--------------------------------------------------*/
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static void
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obstack_save (struct obstack *obs, const char *filename)
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{
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FILE *out = xfopen (filename, "w");
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size_t size = obstack_object_size (obs);
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fwrite (obstack_finish (obs), 1, size, out);
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xfclose (out);
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}
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static const char *
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skeleton_find (const char *envvar, const char *skeleton)
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{
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const char *res = getenv (envvar);
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#ifdef MSDOS
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const char *cp;
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/* File doesn't exist in current directory; try in INIT directory. */
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if (!res && (cp = getenv ("INIT")))
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{
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res = XMALLOC (char, strlen (cp) + strlen (skeleton) + 2);
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sprintf (res, "%s%c%s", cp, '/', skeleton);
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}
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#endif /* !MSDOS */
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if (!res)
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res = skeleton;
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return res;
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}
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/*-----------------------------------------------------------------.
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| Open the input file. Look for the skeletons. Find the names of |
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| the output files. Prepare the obstacks. |
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`-----------------------------------------------------------------*/
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void
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open_files (void)
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{
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char *name_base;
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#ifdef MSDOS
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register char *cp;
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#endif
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int base_length;
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int short_base_length;
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#if defined (VMS) & !defined (__VMS_POSIX)
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const char *tmp_base = "sys$scratch:b_";
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#else
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const char *tmp_base = "/tmp/b.";
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#endif
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int tmp_len;
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#ifdef MSDOS
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tmp_base = getenv ("TMP");
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if (tmp_base == 0)
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tmp_base = "";
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strlwr (infile);
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#endif /* MSDOS */
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#if (defined(_WIN32) && !defined(__CYGWIN32__))
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tmp_base = getenv ("TEMP"); /* Windows95 defines this ... */
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if (tmp_base == 0)
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tmp_base = getenv ("Temp"); /* ... while NT prefers this */
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if (tmp_base == 0)
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tmp_base = "";
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strlwr (infile);
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#endif /* _WIN32 && !__CYGWIN32__ */
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#if (defined(unix) || defined(__unix) || defined(__unix__) || defined(__EMX__))
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{
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char *tmp_ptr = getenv ("TMPDIR");
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if (tmp_ptr != 0)
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tmp_base = stringappend (tmp_ptr, strlen (tmp_ptr), "/b.");
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}
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#endif /* unix || __unix || __unix__ */
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tmp_len = strlen (tmp_base);
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if (spec_outfile)
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{
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/* -o was specified. The precise -o name will be used for FTABLE.
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For other output files, remove the ".c" or ".tab.c" suffix. */
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name_base = spec_outfile;
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#ifdef MSDOS
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strlwr (name_base);
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#endif /* MSDOS */
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/* BASE_LENGTH includes ".tab" but not ".c". */
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base_length = strlen (name_base);
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if (!strcmp (name_base + base_length - 2, ".c"))
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base_length -= 2;
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/* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */
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short_base_length = base_length;
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if (!strncmp (name_base + short_base_length - 4, ".tab", 4))
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short_base_length -= 4;
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else if (!strncmp (name_base + short_base_length - 4, "_tab", 4))
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short_base_length -= 4;
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}
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else if (spec_file_prefix)
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{
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/* -b was specified. Construct names from it. */
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/* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */
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short_base_length = strlen (spec_file_prefix);
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/* Count room for `.tab'. */
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base_length = short_base_length + 4;
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name_base = XMALLOC (char, base_length + 1);
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/* Append `.tab'. */
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strcpy (name_base, spec_file_prefix);
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#ifdef VMS
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strcat (name_base, "_tab");
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#else
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strcat (name_base, ".tab");
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#endif
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#ifdef MSDOS
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strlwr (name_base);
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#endif /* MSDOS */
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}
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else
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{
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/* -o was not specified; compute output file name from input
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or use y.tab.c, etc., if -y was specified. */
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static char FIXED_NAME_BASE[] = "y.y";
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name_base = yacc_flag ? FIXED_NAME_BASE : infile;
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/* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any. */
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base_length = strlen (name_base);
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if (!strcmp (name_base + base_length - 2, ".y"))
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base_length -= 2;
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short_base_length = base_length;
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#ifdef VMS
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name_base = stringappend (name_base, short_base_length, "_tab");
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#else
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#ifdef MSDOS
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name_base = stringappend (name_base, short_base_length, "_tab");
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#else
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name_base = stringappend (name_base, short_base_length, ".tab");
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#endif /* not MSDOS */
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#endif
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base_length = short_base_length + 4;
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}
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finput = xfopen (infile, "r");
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if (!no_parser_flag)
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fparser = xfopen (skeleton_find ("BISON_SIMPLE", BISON_SIMPLE), "r");
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if (verbose_flag)
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{
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#ifdef MSDOS
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outfile = stringappend (name_base, short_base_length, ".out");
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#else
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/* We used to use just .out if spec_name_prefix (-p) was used,
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but that conflicts with Posix. */
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outfile = stringappend (name_base, short_base_length, ".output");
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#endif
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foutput = xfopen (outfile, "w");
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}
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if (no_parser_flag)
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{
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/* use permanent name for actions file */
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actfile = stringappend (name_base, short_base_length, ".act");
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}
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if (defines_flag)
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{
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defsfile = stringappend (name_base, base_length, ".h");
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}
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/* These are opened by `done' or `open_extra_files', if at all */
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if (spec_outfile)
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tabfile = spec_outfile;
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else
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tabfile = stringappend (name_base, base_length, ".c");
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#ifdef VMS
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attrsfile = stringappend (name_base, short_base_length, "_stype.h");
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guardfile = stringappend (name_base, short_base_length, "_guard.c");
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#else
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#ifdef MSDOS
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attrsfile = stringappend (name_base, short_base_length, ".sth");
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guardfile = stringappend (name_base, short_base_length, ".guc");
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#else
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attrsfile = stringappend (name_base, short_base_length, ".stype.h");
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guardfile = stringappend (name_base, short_base_length, ".guard.c");
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#endif /* not MSDOS */
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#endif /* not VMS */
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/* Initialize the obstacks. */
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obstack_init (&action_obstack);
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obstack_init (&attrs_obstack);
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obstack_init (&table_obstack);
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obstack_init (&defines_obstack);
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}
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/*--------------------------------------------------------------------.
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| Open the output files needed only for the semantic parser. This |
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| is done when %semantic_parser is seen in the declarations section. |
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`--------------------------------------------------------------------*/
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void
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open_extra_files (void)
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{
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xfclose (fparser);
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if (!no_parser_flag)
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fparser = xfopen (skeleton_find ("BISON_HAIRY", BISON_HAIRY), "r");
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fguard = xfopen (guardfile, "w");
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}
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/*-----------------------------------------------------.
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| Close the open files, produce all the output files. |
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`-----------------------------------------------------*/
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void
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output_files (void)
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{
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xfclose (fguard);
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xfclose (finput);
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xfclose (fparser);
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xfclose (foutput);
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/* Output the main file. */
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obstack_save (&table_obstack, tabfile);
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/* Output the header file if wanted. */
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if (defines_flag)
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obstack_save (&defines_obstack, defsfile);
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/* If we output only the table, dump the actions in ACTFILE.
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*/
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if (no_parser_flag)
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obstack_save (&action_obstack, actfile);
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/* If we produced a semantic parser ATTRS_OBSTACK must be dumped
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into its own file, ATTTRSFILE. */
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if (semantic_parser)
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obstack_save (&attrs_obstack, attrsfile);
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}
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