src/files.c

   1 /* Open and close files for bison,
   2    Copyright 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc.
   3
   4    This file is part of Bison, the GNU Compiler Compiler.
   5
   6    Bison is free software; you can redistribute it and/or modify it
   7    under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    Bison is distributed in the hope that it will be useful, but
  12    WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with Bison; see the file COPYING.  If not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19    02111-1307, USA.  */
  20
  21
  22 #include "system.h"
  23
  24 #if defined (VMS) & !defined (__VMS_POSIX)
  25 # include <ssdef.h>
  26 # define unlink delete
  27 # ifndef XPFILE
  28 #  define XPFILE "GNU_BISON:[000000]BISON.SIMPLE"
  29 # endif
  30 # ifndef XPFILE1
  31 #  define XPFILE1 "GNU_BISON:[000000]BISON.HAIRY"
  32 # endif
  33 #endif
  34
  35 #if defined (_MSC_VER)
  36 # ifndef XPFILE
  37 #  define XPFILE "c:/usr/local/lib/bison.simple"
  38 # endif
  39 # ifndef XPFILE1
  40 #  define XPFILE1 "c:/usr/local/lib/bison.hairy"
  41 # endif
  42 #endif
  43
  44 #include "getargs.h"
  45 #include "files.h"
  46 #include "xalloc.h"
  47 #include "gram.h"
  48 #include "complain.h"
  49
  50 FILE *finput = NULL;
  51 FILE *foutput = NULL;
  52 FILE *fdefines = NULL;
  53 FILE *ftable = NULL;
  54 FILE *fguard = NULL;
  55 FILE *fparser = NULL;
  56
  57 struct obstack action_obstack;
  58 struct obstack attrs_obstack;
  59
  60 /* File name specified with -o for the output file, or 0 if no -o.  */
  61 char *spec_outfile;
  62
  63 char *infile;
  64 char *attrsfile;
  65
  66 static char *outfile;
  67 static char *defsfile;
  68 static char *tabfile;
  69 static char *guardfile;
  70 static char *actfile;
  71 static char *tmptabfile;
  72 static char *tmpdefsfile;
  73
  74 extern char *mktemp ();         /* So the compiler won't complain */
  75 extern char *getenv ();
  76
  77 extern char *program_name;
  78 \f
  79
  80 static char *
  81 stringappend (const char *string1, int end1, const char *string2)
  82 {
  83   register char *ostring;
  84   register char *cp;
  85   register const char *cp1;
  86   register int i;
  87
  88   cp1 = string2;
  89   i = 0;
  90   while (*cp1++)
  91     i++;
  92
  93   ostring = XCALLOC (char, i + end1 + 1);
  94
  95   cp = ostring;
  96   cp1 = string1;
  97   for (i = 0; i < end1; i++)
  98     *cp++ = *cp1++;
  99
 100   cp1 = string2;
 101   while ((*cp++ = *cp1++))
 102     ;
 103
 104   return ostring;
 105 }
 106
 107 /*-----------------------------------------------------------------.
 108 | Try to open file NAME with mode MODE, and print an error message |
 109 | if fails.                                                        |
 110 `-----------------------------------------------------------------*/
 111
 112 static FILE *
 113 xfopen (const char *name, const char *mode)
 114 {
 115   FILE *ptr;
 116
 117   ptr = fopen (name, mode);
 118   if (!ptr)
 119     error (2, errno, _("cannot open file `%s'"), name);
 120
 121   return ptr;
 122 }
 123
 124 /*-------------------------------------------------------------.
 125 | Try to close file PTR, and print an error message if fails.  |
 126 `-------------------------------------------------------------*/
 127
 128 static int
 129 xfclose (FILE *ptr)
 130 {
 131   int result;
 132
 133   if (ptr == NULL)
 134     return 0;
 135
 136   result = fclose (ptr);
 137   if (result == EOF)
 138     error (2, errno, _("cannot close file"));
 139
 140   return result;
 141 }
 142 \f
 143 /* JF this has been hacked to death.  Nowaday it sets up the file names for
 144    the output files, and opens the tmp files and the parser */
 145 void
 146 open_files (void)
 147 {
 148   char *name_base;
 149 #ifdef MSDOS
 150   register char *cp;
 151 #endif
 152   char *filename;
 153   int base_length;
 154   int short_base_length;
 155
 156 #if defined (VMS) & !defined (__VMS_POSIX)
 157   const char *tmp_base = "sys$scratch:b_";
 158 #else
 159   const char *tmp_base = "/tmp/b.";
 160 #endif
 161   int tmp_len;
 162
 163 #ifdef MSDOS
 164   tmp_base = getenv ("TMP");
 165   if (tmp_base == 0)
 166     tmp_base = "";
 167   strlwr (infile);
 168 #endif /* MSDOS */
 169
 170 #if (defined(_WIN32) && !defined(__CYGWIN32__))
 171   tmp_base = getenv ("TEMP");   /* Windows95 defines this ... */
 172   if (tmp_base == 0)
 173     tmp_base = getenv ("Temp"); /* ... while NT prefers this */
 174   if (tmp_base == 0)
 175     tmp_base = "";
 176   strlwr (infile);
 177 #endif /* _WIN32 && !__CYGWIN32__ */
 178
 179 #if (defined(unix) || defined(__unix) || defined(__unix__) || defined(__EMX__))
 180   {
 181     char *tmp_ptr = getenv ("TMPDIR");
 182
 183     if (tmp_ptr != 0)
 184       tmp_base = stringappend (tmp_ptr, strlen (tmp_ptr), "/b.");
 185   }
 186 #endif /* unix || __unix || __unix__ */
 187
 188   tmp_len = strlen (tmp_base);
 189
 190   if (spec_outfile)
 191     {
 192       /* -o was specified.  The precise -o name will be used for ftable.
 193          For other output files, remove the ".c" or ".tab.c" suffix.  */
 194       name_base = spec_outfile;
 195 #ifdef MSDOS
 196       strlwr (name_base);
 197 #endif /* MSDOS */
 198       /* BASE_LENGTH includes ".tab" but not ".c".  */
 199       base_length = strlen (name_base);
 200       if (!strcmp (name_base + base_length - 2, ".c"))
 201         base_length -= 2;
 202       /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c".  */
 203       short_base_length = base_length;
 204       if (!strncmp (name_base + short_base_length - 4, ".tab", 4))
 205         short_base_length -= 4;
 206       else if (!strncmp (name_base + short_base_length - 4, "_tab", 4))
 207         short_base_length -= 4;
 208     }
 209   else if (spec_file_prefix)
 210     {
 211       /* -b was specified.  Construct names from it.  */
 212       /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c".  */
 213       short_base_length = strlen (spec_file_prefix);
 214       /* Count room for `.tab'.  */
 215       base_length = short_base_length + 4;
 216       name_base = XMALLOC (char, base_length + 1);
 217       /* Append `.tab'.  */
 218       strcpy (name_base, spec_file_prefix);
 219 #ifdef VMS
 220       strcat (name_base, "_tab");
 221 #else
 222       strcat (name_base, ".tab");
 223 #endif
 224 #ifdef MSDOS
 225       strlwr (name_base);
 226 #endif /* MSDOS */
 227     }
 228   else
 229     {
 230       /* -o was not specified; compute output file name from input
 231          or use y.tab.c, etc., if -y was specified.  */
 232
 233       static char FIXED_NAME_BASE[] = "y.y";
 234
 235       name_base = yacc_flag ? FIXED_NAME_BASE : infile;
 236
 237       /* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any.  */
 238
 239       base_length = strlen (name_base);
 240       if (!strcmp (name_base + base_length - 2, ".y"))
 241         base_length -= 2;
 242       short_base_length = base_length;
 243
 244 #ifdef VMS
 245       name_base = stringappend (name_base, short_base_length, "_tab");
 246 #else
 247 #ifdef MSDOS
 248       name_base = stringappend (name_base, short_base_length, "_tab");
 249 #else
 250       name_base = stringappend (name_base, short_base_length, ".tab");
 251 #endif /* not MSDOS */
 252 #endif
 253       base_length = short_base_length + 4;
 254     }
 255
 256   finput = xfopen (infile, "r");
 257
 258   if (!no_parser_flag)
 259     {
 260       filename = getenv ("BISON_SIMPLE");
 261 #ifdef MSDOS
 262       /* File doesn't exist in current directory; try in INIT directory.  */
 263       cp = getenv ("INIT");
 264       if (filename == 0 && cp != NULL)
 265         {
 266           filename = XMALLOC (char, strlen (cp) + strlen (PFILE) + 2);
 267           strcpy (filename, cp);
 268           cp = filename + strlen (filename);
 269           *cp++ = '/';
 270           strcpy (cp, PFILE);
 271         }
 272 #endif /* MSDOS */
 273       fparser = xfopen (filename ? filename : PFILE, "r");
 274     }
 275
 276   if (verbose_flag)
 277     {
 278 #ifdef MSDOS
 279       outfile = stringappend (name_base, short_base_length, ".out");
 280 #else
 281       /* We used to use just .out if spec_name_prefix (-p) was used,
 282          but that conflicts with Posix.  */
 283       outfile = stringappend (name_base, short_base_length, ".output");
 284 #endif
 285       foutput = xfopen (outfile, "w");
 286     }
 287
 288   if (no_parser_flag)
 289     {
 290       /* use permanent name for actions file */
 291       actfile = stringappend (name_base, short_base_length, ".act");
 292     }
 293
 294 #ifdef MSDOS
 295   tmptabfile = mktemp (stringappend (tmp_base, tmp_len, "taXXXXXX"));
 296   tmpdefsfile = mktemp (stringappend (tmp_base, tmp_len, "deXXXXXX"));
 297 #else
 298   tmptabfile = mktemp (stringappend (tmp_base, tmp_len, "tab.XXXXXX"));
 299   tmpdefsfile = mktemp (stringappend (tmp_base, tmp_len, "defs.XXXXXX"));
 300 #endif /* not MSDOS */
 301
 302   ftable = xfopen (tmptabfile, "w+");
 303
 304   if (defines_flag)
 305     {
 306       defsfile = stringappend (name_base, base_length, ".h");
 307       fdefines = xfopen (tmpdefsfile, "w+");
 308     }
 309
 310 #if !(defined (MSDOS) || (defined(_WIN32) && !defined(__CYGWIN32__)))
 311   unlink (tmptabfile);
 312   unlink (tmpdefsfile);
 313 #endif /* MSDOS || (_WIN32 && !__CYGWIN32__) */
 314
 315   /* These are opened by `done' or `open_extra_files', if at all */
 316   if (spec_outfile)
 317     tabfile = spec_outfile;
 318   else
 319     tabfile = stringappend (name_base, base_length, ".c");
 320
 321 #ifdef VMS
 322   attrsfile = stringappend (name_base, short_base_length, "_stype.h");
 323   guardfile = stringappend (name_base, short_base_length, "_guard.c");
 324 #else
 325 #ifdef MSDOS
 326   attrsfile = stringappend (name_base, short_base_length, ".sth");
 327   guardfile = stringappend (name_base, short_base_length, ".guc");
 328 #else
 329   attrsfile = stringappend (name_base, short_base_length, ".stype.h");
 330   guardfile = stringappend (name_base, short_base_length, ".guard.c");
 331 #endif /* not MSDOS */
 332 #endif /* not VMS */
 333
 334   /* Initialize the obstacks. */
 335   obstack_init (&action_obstack);
 336   obstack_init (&attrs_obstack);
 337 }
 338
 339
 340
 341 /*--------------------------------------------------------------------.
 342 | Open the output files needed only for the semantic parser.  This    |
 343 | is done when %semantic_parser is seen in the declarations section.  |
 344 `--------------------------------------------------------------------*/
 345
 346 void
 347 open_extra_files (void)
 348 {
 349   int c;
 350   char *filename;
 351
 352   xfclose (fparser);
 353
 354   if (!no_parser_flag)
 355     {
 356       filename = (char *) getenv ("BISON_HAIRY");
 357 #ifdef MSDOS
 358       {
 359         /* File doesn't exist in current directory; try in INIT
 360            directory.  */
 361         char *cp = getenv ("INIT");
 362         if (filename == 0 && cp != NULL)
 363           {
 364             filename = XMALLOC (char, strlen (cp) + strlen (PFILE1) + 2);
 365             strcpy (filename, cp);
 366             cp = filename + strlen (filename);
 367             *cp++ = '/';
 368             strcpy (cp, PFILE1);
 369           }
 370       }
 371 #endif
 372       fparser = xfopen (filename ? filename : PFILE1, "r");
 373     }
 374
 375   fguard = xfopen (guardfile, "w");
 376 }
 377
 378 void
 379 done (void)
 380 {
 381   xfclose (fguard);
 382   xfclose (finput);
 383   xfclose (fparser);
 384   xfclose (foutput);
 385
 386   /* JF write out the output file */
 387   if (!complain_message_count && ftable)
 388     {
 389       FILE *ftmp;
 390       register int c;
 391
 392       ftmp = xfopen (tabfile, "w");
 393       rewind (ftable);
 394       while ((c = getc (ftable)) != EOF)
 395         putc (c, ftmp);
 396       xfclose (ftmp);
 397       xfclose (ftable);
 398
 399       if (defines_flag)
 400         {
 401           ftmp = xfopen (defsfile, "w");
 402           fflush (fdefines);
 403           rewind (fdefines);
 404           while ((c = getc (fdefines)) != EOF)
 405             putc (c, ftmp);
 406           xfclose (ftmp);
 407           xfclose (fdefines);
 408         }
 409     }
 410
 411   /* If we output only the table, dump the actions in ACTION_OBSTACK.
 412      */
 413   if (no_parser_flag)
 414     {
 415       FILE *faction = xfopen (actfile, "w");
 416       size_t size = obstack_object_size (&action_obstack);
 417       fwrite (obstack_finish (&action_obstack), 1, size, faction);
 418       xfclose (faction);
 419     }
 420
 421   /* If we produced a semantic parser ATTRS_OBSTACK must be dumped
 422      into its own file, ATTTRSFILE.  */
 423   if (semantic_parser)
 424     {
 425       FILE *fattrs = xfopen (attrsfile, "w");
 426       size_t size = obstack_object_size (&attrs_obstack);
 427       fwrite (obstack_finish (&attrs_obstack), 1, size, fattrs);
 428       xfclose (fattrs);
 429     }
 430
 431 #if defined (VMS) & !defined (__VMS_POSIX)
 432   if (ftable)
 433     delete (tmptabfile);
 434 /* Don't call exit again, we're in atexit ().
 435   if (!complain_message_count)
 436     sys$exit(SS$_NORMAL);
 437   sys$exit(SS$_ABORT); */
 438 #else
 439 #if (defined (MSDOS) || (defined(_WIN32) && !defined(__CYGWIN32__)))
 440   if (tmptabfile)
 441     unlink (tmptabfile);
 442   if (tmpdefsfile)
 443     unlink (tmpdefsfile);
 444 #endif /* MSDOS || (_WIN32 && !__CYGWIN32__) */
 445 /* Don't call exit again, we're in atexit ().
 446   exit (complain_message_count ? 1 : 0); */
 447 #endif /* not VMS, or __VMS_POSIX */
 448 }