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 *fattrs = NULL;
  55 FILE *fguard = NULL;
  56 FILE *fparser = NULL;
  57
  58 struct obstack action_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 *tmpattrsfile;
  72 static char *tmptabfile;
  73 static char *tmpdefsfile;
  74
  75 extern char *mktemp ();         /* So the compiler won't complain */
  76 extern char *getenv ();
  77
  78 extern char *program_name;
  79 \f
  80
  81 static char *
  82 stringappend (const char *string1, int end1, const char *string2)
  83 {
  84   register char *ostring;
  85   register char *cp;
  86   register const char *cp1;
  87   register int i;
  88
  89   cp1 = string2;
  90   i = 0;
  91   while (*cp1++)
  92     i++;
  93
  94   ostring = XCALLOC (char, i + end1 + 1);
  95
  96   cp = ostring;
  97   cp1 = string1;
  98   for (i = 0; i < end1; i++)
  99     *cp++ = *cp1++;
 100
 101   cp1 = string2;
 102   while ((*cp++ = *cp1++))
 103     ;
 104
 105   return ostring;
 106 }
 107
 108 /*-----------------------------------------------------------------.
 109 | Try to open file NAME with mode MODE, and print an error message |
 110 | if fails.                                                        |
 111 `-----------------------------------------------------------------*/
 112
 113 static FILE *
 114 xfopen (const char *name, const char *mode)
 115 {
 116   FILE *ptr;
 117
 118   ptr = fopen (name, mode);
 119   if (!ptr)
 120     error (2, errno, _("cannot open file `%s'"), name);
 121
 122   return ptr;
 123 }
 124
 125 /*-------------------------------------------------------------.
 126 | Try to close file PTR, and print an error message if fails.  |
 127 `-------------------------------------------------------------*/
 128
 129 static int
 130 xfclose (FILE *ptr)
 131 {
 132   int result;
 133
 134   if (ptr == NULL)
 135     return 0;
 136
 137   result = fclose (ptr);
 138   if (result == EOF)
 139     error (2, errno, _("cannot close file"));
 140
 141   return result;
 142 }
 143 \f
 144 /* JF this has been hacked to death.  Nowaday it sets up the file names for
 145    the output files, and opens the tmp files and the parser */
 146 void
 147 open_files (void)
 148 {
 149   char *name_base;
 150 #ifdef MSDOS
 151   register char *cp;
 152 #endif
 153   char *filename;
 154   int base_length;
 155   int short_base_length;
 156
 157 #if defined (VMS) & !defined (__VMS_POSIX)
 158   const char *tmp_base = "sys$scratch:b_";
 159 #else
 160   const char *tmp_base = "/tmp/b.";
 161 #endif
 162   int tmp_len;
 163
 164 #ifdef MSDOS
 165   tmp_base = getenv ("TMP");
 166   if (tmp_base == 0)
 167     tmp_base = "";
 168   strlwr (infile);
 169 #endif /* MSDOS */
 170
 171 #if (defined(_WIN32) && !defined(__CYGWIN32__))
 172   tmp_base = getenv ("TEMP");   /* Windows95 defines this ... */
 173   if (tmp_base == 0)
 174     tmp_base = getenv ("Temp"); /* ... while NT prefers this */
 175   if (tmp_base == 0)
 176     tmp_base = "";
 177   strlwr (infile);
 178 #endif /* _WIN32 && !__CYGWIN32__ */
 179
 180 #if (defined(unix) || defined(__unix) || defined(__unix__) || defined(__EMX__))
 181   {
 182     char *tmp_ptr = getenv ("TMPDIR");
 183
 184     if (tmp_ptr != 0)
 185       tmp_base = stringappend (tmp_ptr, strlen (tmp_ptr), "/b.");
 186   }
 187 #endif /* unix || __unix || __unix__ */
 188
 189   tmp_len = strlen (tmp_base);
 190
 191   if (spec_outfile)
 192     {
 193       /* -o was specified.  The precise -o name will be used for ftable.
 194          For other output files, remove the ".c" or ".tab.c" suffix.  */
 195       name_base = spec_outfile;
 196 #ifdef MSDOS
 197       strlwr (name_base);
 198 #endif /* MSDOS */
 199       /* BASE_LENGTH includes ".tab" but not ".c".  */
 200       base_length = strlen (name_base);
 201       if (!strcmp (name_base + base_length - 2, ".c"))
 202         base_length -= 2;
 203       /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c".  */
 204       short_base_length = base_length;
 205       if (!strncmp (name_base + short_base_length - 4, ".tab", 4))
 206         short_base_length -= 4;
 207       else if (!strncmp (name_base + short_base_length - 4, "_tab", 4))
 208         short_base_length -= 4;
 209     }
 210   else if (spec_file_prefix)
 211     {
 212       /* -b was specified.  Construct names from it.  */
 213       /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c".  */
 214       short_base_length = strlen (spec_file_prefix);
 215       /* Count room for `.tab'.  */
 216       base_length = short_base_length + 4;
 217       name_base = XMALLOC (char, base_length + 1);
 218       /* Append `.tab'.  */
 219       strcpy (name_base, spec_file_prefix);
 220 #ifdef VMS
 221       strcat (name_base, "_tab");
 222 #else
 223       strcat (name_base, ".tab");
 224 #endif
 225 #ifdef MSDOS
 226       strlwr (name_base);
 227 #endif /* MSDOS */
 228     }
 229   else
 230     {
 231       /* -o was not specified; compute output file name from input
 232          or use y.tab.c, etc., if -y was specified.  */
 233
 234       static char FIXED_NAME_BASE[] = "y.y";
 235
 236       name_base = yacc_flag ? FIXED_NAME_BASE : infile;
 237
 238       /* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any.  */
 239
 240       base_length = strlen (name_base);
 241       if (!strcmp (name_base + base_length - 2, ".y"))
 242         base_length -= 2;
 243       short_base_length = base_length;
 244
 245 #ifdef VMS
 246       name_base = stringappend (name_base, short_base_length, "_tab");
 247 #else
 248 #ifdef MSDOS
 249       name_base = stringappend (name_base, short_base_length, "_tab");
 250 #else
 251       name_base = stringappend (name_base, short_base_length, ".tab");
 252 #endif /* not MSDOS */
 253 #endif
 254       base_length = short_base_length + 4;
 255     }
 256
 257   finput = xfopen (infile, "r");
 258
 259   if (!no_parser_flag)
 260     {
 261       filename = getenv ("BISON_SIMPLE");
 262 #ifdef MSDOS
 263       /* File doesn't exist in current directory; try in INIT directory.  */
 264       cp = getenv ("INIT");
 265       if (filename == 0 && cp != NULL)
 266         {
 267           filename = XMALLOC (char, strlen (cp) + strlen (PFILE) + 2);
 268           strcpy (filename, cp);
 269           cp = filename + strlen (filename);
 270           *cp++ = '/';
 271           strcpy (cp, PFILE);
 272         }
 273 #endif /* MSDOS */
 274       fparser = xfopen (filename ? filename : PFILE, "r");
 275     }
 276
 277   if (verbose_flag)
 278     {
 279 #ifdef MSDOS
 280       outfile = stringappend (name_base, short_base_length, ".out");
 281 #else
 282       /* We used to use just .out if spec_name_prefix (-p) was used,
 283          but that conflicts with Posix.  */
 284       outfile = stringappend (name_base, short_base_length, ".output");
 285 #endif
 286       foutput = xfopen (outfile, "w");
 287     }
 288
 289   if (no_parser_flag)
 290     {
 291       /* use permanent name for actions file */
 292       actfile = stringappend (name_base, short_base_length, ".act");
 293     }
 294
 295 #ifdef MSDOS
 296   tmpattrsfile = mktemp (stringappend (tmp_base, tmp_len, "atXXXXXX"));
 297   tmptabfile = mktemp (stringappend (tmp_base, tmp_len, "taXXXXXX"));
 298   tmpdefsfile = mktemp (stringappend (tmp_base, tmp_len, "deXXXXXX"));
 299 #else
 300   tmpattrsfile = mktemp (stringappend (tmp_base, tmp_len, "attrs.XXXXXX"));
 301   tmptabfile = mktemp (stringappend (tmp_base, tmp_len, "tab.XXXXXX"));
 302   tmpdefsfile = mktemp (stringappend (tmp_base, tmp_len, "defs.XXXXXX"));
 303 #endif /* not MSDOS */
 304
 305   fattrs = xfopen (tmpattrsfile, "w+");
 306   ftable = xfopen (tmptabfile, "w+");
 307
 308   if (defines_flag)
 309     {
 310       defsfile = stringappend (name_base, base_length, ".h");
 311       fdefines = xfopen (tmpdefsfile, "w+");
 312     }
 313
 314 #if !(defined (MSDOS) || (defined(_WIN32) && !defined(__CYGWIN32__)))
 315   unlink (tmpattrsfile);
 316   unlink (tmptabfile);
 317   unlink (tmpdefsfile);
 318 #endif /* MSDOS || (_WIN32 && !__CYGWIN32__) */
 319
 320   /* These are opened by `done' or `open_extra_files', if at all */
 321   if (spec_outfile)
 322     tabfile = spec_outfile;
 323   else
 324     tabfile = stringappend (name_base, base_length, ".c");
 325
 326 #ifdef VMS
 327   attrsfile = stringappend (name_base, short_base_length, "_stype.h");
 328   guardfile = stringappend (name_base, short_base_length, "_guard.c");
 329 #else
 330 #ifdef MSDOS
 331   attrsfile = stringappend (name_base, short_base_length, ".sth");
 332   guardfile = stringappend (name_base, short_base_length, ".guc");
 333 #else
 334   attrsfile = stringappend (name_base, short_base_length, ".stype.h");
 335   guardfile = stringappend (name_base, short_base_length, ".guard.c");
 336 #endif /* not MSDOS */
 337 #endif /* not VMS */
 338
 339   /* Setup the action obstack. */
 340   obstack_init (&action_obstack);
 341 }
 342
 343
 344
 345 /*--------------------------------------------------------------------.
 346 | Open the output files needed only for the semantic parser.  This    |
 347 | is done when %semantic_parser is seen in the declarations section.  |
 348 `--------------------------------------------------------------------*/
 349
 350 void
 351 open_extra_files (void)
 352 {
 353   FILE *ftmp;
 354   int c;
 355   char *filename;
 356 #ifdef MSDOS
 357   char *cp;
 358 #endif
 359
 360   xfclose (fparser);
 361
 362   if (!no_parser_flag)
 363     {
 364       filename = (char *) getenv ("BISON_HAIRY");
 365 #ifdef MSDOS
 366       /* File doesn't exist in current directory; try in INIT directory.  */
 367       cp = getenv ("INIT");
 368       if (filename == 0 && cp != NULL)
 369         {
 370           filename = XMALLOC (char, strlen (cp) + strlen (PFILE1) + 2);
 371           strcpy (filename, cp);
 372           cp = filename + strlen (filename);
 373           *cp++ = '/';
 374           strcpy (cp, PFILE1);
 375         }
 376 #endif
 377       fparser = xfopen (filename ? filename : PFILE1, "r");
 378     }
 379
 380   /* JF change from inline attrs file to separate one */
 381   ftmp = xfopen (attrsfile, "w");
 382   rewind (fattrs);
 383   while ((c = getc (fattrs)) != EOF)    /* Thank god for buffering */
 384     putc (c, ftmp);
 385   xfclose (fattrs);
 386   fattrs = ftmp;
 387
 388   fguard = xfopen (guardfile, "w");
 389
 390 }
 391
 392 void
 393 done (void)
 394 {
 395   xfclose (fattrs);
 396   xfclose (fguard);
 397   xfclose (finput);
 398   xfclose (fparser);
 399   xfclose (foutput);
 400
 401   /* JF write out the output file */
 402   if (!complain_message_count && ftable)
 403     {
 404       FILE *ftmp;
 405       register int c;
 406
 407       ftmp = xfopen (tabfile, "w");
 408       rewind (ftable);
 409       while ((c = getc (ftable)) != EOF)
 410         putc (c, ftmp);
 411       xfclose (ftmp);
 412       xfclose (ftable);
 413
 414       if (defines_flag)
 415         {
 416           ftmp = xfopen (defsfile, "w");
 417           fflush (fdefines);
 418           rewind (fdefines);
 419           while ((c = getc (fdefines)) != EOF)
 420             putc (c, ftmp);
 421           xfclose (ftmp);
 422           xfclose (fdefines);
 423         }
 424     }
 425
 426   if (no_parser_flag)
 427     {
 428       FILE *faction = xfopen (actfile, "w");
 429       size_t size = obstack_object_size (&action_obstack);
 430       fwrite (obstack_finish (&action_obstack), 1, size, faction);
 431       fclose (faction);
 432     }
 433 #if defined (VMS) & !defined (__VMS_POSIX)
 434   if (fattrs)
 435     delete (tmpattrsfile);
 436   if (ftable)
 437     delete (tmptabfile);
 438 /* Don't call exit again, we're in atexit ().
 439   if (!complain_message_count)
 440     sys$exit(SS$_NORMAL);
 441   sys$exit(SS$_ABORT); */
 442 #else
 443 #if (defined (MSDOS) || (defined(_WIN32) && !defined(__CYGWIN32__)))
 444   if (tmpattrsfile)
 445     unlink (tmpattrsfile);
 446   if (tmptabfile)
 447     unlink (tmptabfile);
 448   if (tmpdefsfile)
 449     unlink (tmpdefsfile);
 450 #endif /* MSDOS || (_WIN32 && !__CYGWIN32__) */
 451 /* Don't call exit again, we're in atexit ().
 452   exit (complain_message_count ? 1 : 0); */
 453 #endif /* not VMS, or __VMS_POSIX */
 454 }