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 *fguard = NULL;
  53 FILE *fparser = NULL;
  54
  55 struct obstack action_obstack;
  56 struct obstack attrs_obstack;
  57 struct obstack table_obstack;
  58 struct obstack defines_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
  72 extern char *getenv ();
  73
  74 extern char *program_name;
  75 \f
  76
  77 static char *
  78 stringappend (const char *string1, int end1, const char *string2)
  79 {
  80   register char *ostring;
  81   register char *cp;
  82   register const char *cp1;
  83   register int i;
  84
  85   cp1 = string2;
  86   i = 0;
  87   while (*cp1++)
  88     i++;
  89
  90   ostring = XCALLOC (char, i + end1 + 1);
  91
  92   cp = ostring;
  93   cp1 = string1;
  94   for (i = 0; i < end1; i++)
  95     *cp++ = *cp1++;
  96
  97   cp1 = string2;
  98   while ((*cp++ = *cp1++))
  99     ;
 100
 101   return ostring;
 102 }
 103
 104 /*-----------------------------------------------------------------.
 105 | Try to open file NAME with mode MODE, and print an error message |
 106 | if fails.                                                        |
 107 `-----------------------------------------------------------------*/
 108
 109 static FILE *
 110 xfopen (const char *name, const char *mode)
 111 {
 112   FILE *ptr;
 113
 114   ptr = fopen (name, mode);
 115   if (!ptr)
 116     error (2, errno, _("cannot open file `%s'"), name);
 117
 118   return ptr;
 119 }
 120
 121 /*-------------------------------------------------------------.
 122 | Try to close file PTR, and print an error message if fails.  |
 123 `-------------------------------------------------------------*/
 124
 125 static int
 126 xfclose (FILE *ptr)
 127 {
 128   int result;
 129
 130   if (ptr == NULL)
 131     return 0;
 132
 133   result = fclose (ptr);
 134   if (result == EOF)
 135     error (2, errno, _("cannot close file"));
 136
 137   return result;
 138 }
 139 \f
 140 /* JF this has been hacked to death.  Nowaday it sets up the file names for
 141    the output files, and opens the tmp files and the parser */
 142 void
 143 open_files (void)
 144 {
 145   char *name_base;
 146 #ifdef MSDOS
 147   register char *cp;
 148 #endif
 149   char *filename;
 150   int base_length;
 151   int short_base_length;
 152
 153 #if defined (VMS) & !defined (__VMS_POSIX)
 154   const char *tmp_base = "sys$scratch:b_";
 155 #else
 156   const char *tmp_base = "/tmp/b.";
 157 #endif
 158   int tmp_len;
 159
 160 #ifdef MSDOS
 161   tmp_base = getenv ("TMP");
 162   if (tmp_base == 0)
 163     tmp_base = "";
 164   strlwr (infile);
 165 #endif /* MSDOS */
 166
 167 #if (defined(_WIN32) && !defined(__CYGWIN32__))
 168   tmp_base = getenv ("TEMP");   /* Windows95 defines this ... */
 169   if (tmp_base == 0)
 170     tmp_base = getenv ("Temp"); /* ... while NT prefers this */
 171   if (tmp_base == 0)
 172     tmp_base = "";
 173   strlwr (infile);
 174 #endif /* _WIN32 && !__CYGWIN32__ */
 175
 176 #if (defined(unix) || defined(__unix) || defined(__unix__) || defined(__EMX__))
 177   {
 178     char *tmp_ptr = getenv ("TMPDIR");
 179
 180     if (tmp_ptr != 0)
 181       tmp_base = stringappend (tmp_ptr, strlen (tmp_ptr), "/b.");
 182   }
 183 #endif /* unix || __unix || __unix__ */
 184
 185   tmp_len = strlen (tmp_base);
 186
 187   if (spec_outfile)
 188     {
 189       /* -o was specified.  The precise -o name will be used for FTABLE.
 190          For other output files, remove the ".c" or ".tab.c" suffix.  */
 191       name_base = spec_outfile;
 192 #ifdef MSDOS
 193       strlwr (name_base);
 194 #endif /* MSDOS */
 195       /* BASE_LENGTH includes ".tab" but not ".c".  */
 196       base_length = strlen (name_base);
 197       if (!strcmp (name_base + base_length - 2, ".c"))
 198         base_length -= 2;
 199       /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c".  */
 200       short_base_length = base_length;
 201       if (!strncmp (name_base + short_base_length - 4, ".tab", 4))
 202         short_base_length -= 4;
 203       else if (!strncmp (name_base + short_base_length - 4, "_tab", 4))
 204         short_base_length -= 4;
 205     }
 206   else if (spec_file_prefix)
 207     {
 208       /* -b was specified.  Construct names from it.  */
 209       /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c".  */
 210       short_base_length = strlen (spec_file_prefix);
 211       /* Count room for `.tab'.  */
 212       base_length = short_base_length + 4;
 213       name_base = XMALLOC (char, base_length + 1);
 214       /* Append `.tab'.  */
 215       strcpy (name_base, spec_file_prefix);
 216 #ifdef VMS
 217       strcat (name_base, "_tab");
 218 #else
 219       strcat (name_base, ".tab");
 220 #endif
 221 #ifdef MSDOS
 222       strlwr (name_base);
 223 #endif /* MSDOS */
 224     }
 225   else
 226     {
 227       /* -o was not specified; compute output file name from input
 228          or use y.tab.c, etc., if -y was specified.  */
 229
 230       static char FIXED_NAME_BASE[] = "y.y";
 231
 232       name_base = yacc_flag ? FIXED_NAME_BASE : infile;
 233
 234       /* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any.  */
 235
 236       base_length = strlen (name_base);
 237       if (!strcmp (name_base + base_length - 2, ".y"))
 238         base_length -= 2;
 239       short_base_length = base_length;
 240
 241 #ifdef VMS
 242       name_base = stringappend (name_base, short_base_length, "_tab");
 243 #else
 244 #ifdef MSDOS
 245       name_base = stringappend (name_base, short_base_length, "_tab");
 246 #else
 247       name_base = stringappend (name_base, short_base_length, ".tab");
 248 #endif /* not MSDOS */
 249 #endif
 250       base_length = short_base_length + 4;
 251     }
 252
 253   finput = xfopen (infile, "r");
 254
 255   if (!no_parser_flag)
 256     {
 257       filename = getenv ("BISON_SIMPLE");
 258 #ifdef MSDOS
 259       /* File doesn't exist in current directory; try in INIT directory.  */
 260       cp = getenv ("INIT");
 261       if (filename == 0 && cp != NULL)
 262         {
 263           filename = XMALLOC (char, strlen (cp) + strlen (PFILE) + 2);
 264           strcpy (filename, cp);
 265           cp = filename + strlen (filename);
 266           *cp++ = '/';
 267           strcpy (cp, PFILE);
 268         }
 269 #endif /* MSDOS */
 270       fparser = xfopen (filename ? filename : PFILE, "r");
 271     }
 272
 273   if (verbose_flag)
 274     {
 275 #ifdef MSDOS
 276       outfile = stringappend (name_base, short_base_length, ".out");
 277 #else
 278       /* We used to use just .out if spec_name_prefix (-p) was used,
 279          but that conflicts with Posix.  */
 280       outfile = stringappend (name_base, short_base_length, ".output");
 281 #endif
 282       foutput = xfopen (outfile, "w");
 283     }
 284
 285   if (no_parser_flag)
 286     {
 287       /* use permanent name for actions file */
 288       actfile = stringappend (name_base, short_base_length, ".act");
 289     }
 290
 291   if (defines_flag)
 292     {
 293       defsfile = stringappend (name_base, base_length, ".h");
 294     }
 295
 296   /* These are opened by `done' or `open_extra_files', if at all */
 297   if (spec_outfile)
 298     tabfile = spec_outfile;
 299   else
 300     tabfile = stringappend (name_base, base_length, ".c");
 301
 302 #ifdef VMS
 303   attrsfile = stringappend (name_base, short_base_length, "_stype.h");
 304   guardfile = stringappend (name_base, short_base_length, "_guard.c");
 305 #else
 306 #ifdef MSDOS
 307   attrsfile = stringappend (name_base, short_base_length, ".sth");
 308   guardfile = stringappend (name_base, short_base_length, ".guc");
 309 #else
 310   attrsfile = stringappend (name_base, short_base_length, ".stype.h");
 311   guardfile = stringappend (name_base, short_base_length, ".guard.c");
 312 #endif /* not MSDOS */
 313 #endif /* not VMS */
 314
 315   /* Initialize the obstacks. */
 316   obstack_init (&action_obstack);
 317   obstack_init (&attrs_obstack);
 318   obstack_init (&table_obstack);
 319   obstack_init (&defines_obstack);
 320 }
 321
 322
 323
 324 /*--------------------------------------------------------------------.
 325 | Open the output files needed only for the semantic parser.  This    |
 326 | is done when %semantic_parser is seen in the declarations section.  |
 327 `--------------------------------------------------------------------*/
 328
 329 void
 330 open_extra_files (void)
 331 {
 332   int c;
 333   char *filename;
 334
 335   xfclose (fparser);
 336
 337   if (!no_parser_flag)
 338     {
 339       filename = (char *) getenv ("BISON_HAIRY");
 340 #ifdef MSDOS
 341       {
 342         /* File doesn't exist in current directory; try in INIT
 343            directory.  */
 344         char *cp = getenv ("INIT");
 345         if (filename == 0 && cp != NULL)
 346           {
 347             filename = XMALLOC (char, strlen (cp) + strlen (PFILE1) + 2);
 348             strcpy (filename, cp);
 349             cp = filename + strlen (filename);
 350             *cp++ = '/';
 351             strcpy (cp, PFILE1);
 352           }
 353       }
 354 #endif
 355       fparser = xfopen (filename ? filename : PFILE1, "r");
 356     }
 357
 358   fguard = xfopen (guardfile, "w");
 359 }
 360
 361 void
 362 done (void)
 363 {
 364   xfclose (fguard);
 365   xfclose (finput);
 366   xfclose (fparser);
 367   xfclose (foutput);
 368
 369   /* JF write out the output file */
 370   if (!complain_message_count)
 371     {
 372       /* Output the main file.  */
 373       FILE *ftab = xfopen (tabfile, "w");
 374       size_t size = obstack_object_size (&table_obstack);
 375       fwrite (obstack_finish (&table_obstack), 1, size, ftab);
 376       xfclose (ftab);
 377
 378       /* Output the header file is wanted. */
 379       if (defines_flag)
 380         {
 381           FILE *fdefs = xfopen (defsfile, "w");
 382           size_t size = obstack_object_size (&defines_obstack);
 383           fwrite (obstack_finish (&defines_obstack), 1, size, fdefs);
 384           xfclose (fdefs);
 385         }
 386     }
 387
 388   /* If we output only the table, dump the actions in ACTION_OBSTACK.
 389      */
 390   if (no_parser_flag)
 391     {
 392       FILE *faction = xfopen (actfile, "w");
 393       size_t size = obstack_object_size (&action_obstack);
 394       fwrite (obstack_finish (&action_obstack), 1, size, faction);
 395       xfclose (faction);
 396     }
 397
 398   /* If we produced a semantic parser ATTRS_OBSTACK must be dumped
 399      into its own file, ATTTRSFILE.  */
 400   if (semantic_parser)
 401     {
 402       FILE *fattrs = xfopen (attrsfile, "w");
 403       size_t size = obstack_object_size (&attrs_obstack);
 404       fwrite (obstack_finish (&attrs_obstack), 1, size, fattrs);
 405       xfclose (fattrs);
 406     }
 407
 408 /* Don't call exit again, we're in atexit ().
 409   exit (complain_message_count ? 1 : 0); */
 410 }