src/files.c

   1 /* Open and close files for bison,
   2    Copyright (C) 1984, 1986, 1989, 1992 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
   7 it 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,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU 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
  18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 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 <stdio.h>
  45
  46 #ifdef HAVE_UNISTD_H
  47 #include <unistd.h>
  48 #endif
  49
  50 #include "files.h"
  51 #include "alloc.h"
  52 #include "gram.h"
  53
  54 FILE *finput = NULL;
  55 FILE *foutput = NULL;
  56 FILE *fdefines = NULL;
  57 FILE *ftable = NULL;
  58 FILE *fattrs = NULL;
  59 FILE *fguard = NULL;
  60 FILE *faction = NULL;
  61 FILE *fparser = NULL;
  62
  63 /* File name specified with -o for the output file, or 0 if no -o.  */
  64 char *spec_outfile;
  65
  66 char *infile;
  67 char *outfile;
  68 char *defsfile;
  69 char *tabfile;
  70 char *attrsfile;
  71 char *guardfile;
  72 char *actfile;
  73 char *tmpattrsfile;
  74 char *tmptabfile;
  75 char *tmpdefsfile;
  76
  77 extern int noparserflag;
  78
  79 extern char     *mktemp();      /* So the compiler won't complain */
  80 extern char     *getenv();
  81 extern void     perror();
  82
  83 char *stringappend PARAMS((char *, int, char *));
  84 void openfiles PARAMS((void));
  85 void open_extra_files PARAMS((void));
  86 FILE *tryopen PARAMS((char *, char *)); /* This might be a good idea */
  87 int tryclose PARAMS((FILE *));
  88 void done PARAMS((int));
  89
  90 extern char *program_name;
  91 extern int verboseflag;
  92 extern int definesflag;
  93 int fixed_outfiles = 0;
  94 \f
  95
  96 char *
  97 stringappend (char *string1, int end1, char *string2)
  98 {
  99   register char *ostring;
 100   register char *cp, *cp1;
 101   register int i;
 102
 103   cp = string2;  i = 0;
 104   while (*cp++) i++;
 105
 106   ostring = NEW2(i+end1+1, char);
 107
 108   cp = ostring;
 109   cp1 = string1;
 110   for (i = 0; i < end1; i++)
 111     *cp++ = *cp1++;
 112
 113   cp1 = string2;
 114   while ((*cp++ = *cp1++))
 115     ;
 116
 117   return ostring;
 118 }
 119
 120
 121 /* JF this has been hacked to death.  Nowaday it sets up the file names for
 122    the output files, and opens the tmp files and the parser */
 123 void
 124 openfiles (void)
 125 {
 126   char *name_base;
 127 #ifdef MSDOS
 128   register char *cp;
 129 #endif
 130   char *filename;
 131   int base_length;
 132   int short_base_length;
 133
 134 #if defined (VMS) & !defined (__VMS_POSIX)
 135   char *tmp_base = "sys$scratch:b_";
 136 #else
 137   char *tmp_base = "/tmp/b.";
 138 #endif
 139   int tmp_len;
 140
 141 #ifdef MSDOS
 142   tmp_base = getenv ("TMP");
 143   if (tmp_base == 0)
 144     tmp_base = "";
 145   strlwr (infile);
 146 #endif /* MSDOS */
 147
 148 #if (defined(_WIN32) && !defined(__CYGWIN32__))
 149   tmp_base = getenv ("TEMP");           /* Windows95 defines this ... */
 150   if (tmp_base == 0)
 151     tmp_base = getenv ("Temp");         /* ... while NT prefers this */
 152   if (tmp_base == 0)
 153     tmp_base = "";
 154   strlwr (infile);
 155 #endif /* _WIN32 && !__CYGWIN32__ */
 156
 157 #if (defined(unix) || defined(__unix) || defined(__unix__) || defined(__EMX__))
 158   {
 159     char *tmp_ptr = getenv("TMPDIR");
 160
 161     if (tmp_ptr != 0)
 162       tmp_base = stringappend (tmp_ptr, strlen (tmp_ptr), "/b.");
 163   }
 164 #endif  /* unix || __unix || __unix__ */
 165
 166   tmp_len = strlen (tmp_base);
 167
 168   if (spec_outfile)
 169     {
 170       /* -o was specified.  The precise -o name will be used for ftable.
 171          For other output files, remove the ".c" or ".tab.c" suffix.  */
 172       name_base = spec_outfile;
 173 #ifdef MSDOS
 174       strlwr (name_base);
 175 #endif /* MSDOS */
 176       /* BASE_LENGTH includes ".tab" but not ".c".  */
 177       base_length = strlen (name_base);
 178       if (!strcmp (name_base + base_length - 2, ".c"))
 179         base_length -= 2;
 180       /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c".  */
 181       short_base_length = base_length;
 182       if (!strncmp (name_base + short_base_length - 4, ".tab", 4))
 183         short_base_length -= 4;
 184       else if (!strncmp (name_base + short_base_length - 4, "_tab", 4))
 185         short_base_length -= 4;
 186     }
 187   else if (spec_file_prefix)
 188     {
 189       /* -b was specified.  Construct names from it.  */
 190       /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c".  */
 191       short_base_length = strlen (spec_file_prefix);
 192       /* Count room for `.tab'.  */
 193       base_length = short_base_length + 4;
 194       name_base = (char *) xmalloc (base_length + 1);
 195       /* Append `.tab'.  */
 196       strcpy (name_base, spec_file_prefix);
 197 #ifdef VMS
 198       strcat (name_base, "_tab");
 199 #else
 200       strcat (name_base, ".tab");
 201 #endif
 202 #ifdef MSDOS
 203       strlwr (name_base);
 204 #endif /* MSDOS */
 205     }
 206   else
 207     {
 208       /* -o was not specified; compute output file name from input
 209          or use y.tab.c, etc., if -y was specified.  */
 210
 211       name_base = fixed_outfiles ? "y.y" : infile;
 212
 213       /* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any.  */
 214
 215       base_length = strlen (name_base);
 216       if (!strcmp (name_base + base_length - 2, ".y"))
 217         base_length -= 2;
 218       short_base_length = base_length;
 219
 220 #ifdef VMS
 221       name_base = stringappend(name_base, short_base_length, "_tab");
 222 #else
 223 #ifdef MSDOS
 224       name_base = stringappend(name_base, short_base_length, "_tab");
 225 #else
 226       name_base = stringappend(name_base, short_base_length, ".tab");
 227 #endif /* not MSDOS */
 228 #endif
 229       base_length = short_base_length + 4;
 230     }
 231
 232   finput = tryopen(infile, "r");
 233
 234   if (! noparserflag)
 235     {
 236       filename = getenv("BISON_SIMPLE");
 237 #ifdef MSDOS
 238       /* File doesn't exist in current directory; try in INIT directory.  */
 239       cp = getenv("INIT");
 240       if (filename == 0 && cp != NULL)
 241         {
 242           filename = xmalloc(strlen(cp) + strlen(PFILE) + 2);
 243           strcpy(filename, cp);
 244           cp = filename + strlen(filename);
 245           *cp++ = '/';
 246           strcpy(cp, PFILE);
 247         }
 248 #endif /* MSDOS */
 249       fparser = tryopen(filename ? filename : PFILE, "r");
 250     }
 251
 252   if (verboseflag)
 253     {
 254 #ifdef MSDOS
 255       outfile = stringappend(name_base, short_base_length, ".out");
 256 #else
 257       /* We used to use just .out if spec_name_prefix (-p) was used,
 258          but that conflicts with Posix.  */
 259       outfile = stringappend(name_base, short_base_length, ".output");
 260 #endif
 261       foutput = tryopen(outfile, "w");
 262     }
 263
 264   if (noparserflag)
 265     {
 266       /* use permanent name for actions file */
 267       actfile = stringappend(name_base, short_base_length, ".act");
 268       faction = tryopen(actfile, "w");
 269     }
 270
 271 #ifdef MSDOS
 272   if (! noparserflag)
 273     actfile = mktemp(stringappend(tmp_base, tmp_len, "acXXXXXX"));
 274   tmpattrsfile = mktemp(stringappend(tmp_base, tmp_len, "atXXXXXX"));
 275   tmptabfile = mktemp(stringappend(tmp_base, tmp_len, "taXXXXXX"));
 276   tmpdefsfile = mktemp(stringappend(tmp_base, tmp_len, "deXXXXXX"));
 277 #else
 278   if (! noparserflag)
 279     actfile = mktemp(stringappend(tmp_base, tmp_len, "act.XXXXXX"));
 280   tmpattrsfile = mktemp(stringappend(tmp_base, tmp_len, "attrs.XXXXXX"));
 281   tmptabfile = mktemp(stringappend(tmp_base, tmp_len, "tab.XXXXXX"));
 282   tmpdefsfile = mktemp(stringappend(tmp_base, tmp_len, "defs.XXXXXX"));
 283 #endif /* not MSDOS */
 284
 285   if (! noparserflag)
 286     faction = tryopen(actfile, "w+");
 287   fattrs = tryopen(tmpattrsfile,"w+");
 288   ftable = tryopen(tmptabfile, "w+");
 289
 290   if (definesflag)
 291     {
 292       defsfile = stringappend(name_base, base_length, ".h");
 293       fdefines = tryopen(tmpdefsfile, "w+");
 294     }
 295
 296 #if !(defined (MSDOS) || (defined(_WIN32) && !defined(__CYGWIN32__)))
 297   if (! noparserflag)
 298     unlink(actfile);
 299   unlink(tmpattrsfile);
 300   unlink(tmptabfile);
 301   unlink(tmpdefsfile);
 302 #endif /* MSDOS || (_WIN32 && !__CYGWIN32__) */
 303
 304         /* These are opened by `done' or `open_extra_files', if at all */
 305   if (spec_outfile)
 306     tabfile = spec_outfile;
 307   else
 308     tabfile = stringappend(name_base, base_length, ".c");
 309
 310 #ifdef VMS
 311   attrsfile = stringappend(name_base, short_base_length, "_stype.h");
 312   guardfile = stringappend(name_base, short_base_length, "_guard.c");
 313 #else
 314 #ifdef MSDOS
 315   attrsfile = stringappend(name_base, short_base_length, ".sth");
 316   guardfile = stringappend(name_base, short_base_length, ".guc");
 317 #else
 318   attrsfile = stringappend(name_base, short_base_length, ".stype.h");
 319   guardfile = stringappend(name_base, short_base_length, ".guard.c");
 320 #endif /* not MSDOS */
 321 #endif /* not VMS */
 322 }
 323
 324
 325
 326 /* open the output files needed only for the semantic parser.
 327 This is done when %semantic_parser is seen in the declarations section.  */
 328
 329 void
 330 open_extra_files (void)
 331 {
 332   FILE *ftmp;
 333   int c;
 334   char *filename;
 335 #ifdef MSDOS
 336   char *cp;
 337 #endif
 338
 339   tryclose(fparser);
 340
 341   if (! noparserflag)
 342     {
 343       filename = (char *) getenv ("BISON_HAIRY");
 344 #ifdef MSDOS
 345       /* File doesn't exist in current directory; try in INIT directory.  */
 346       cp = getenv("INIT");
 347       if (filename == 0 && cp != NULL)
 348         {
 349           filename = xmalloc(strlen(cp) + strlen(PFILE1) + 2);
 350           strcpy(filename, cp);
 351           cp = filename + strlen(filename);
 352           *cp++ = '/';
 353           strcpy(cp, PFILE1);
 354         }
 355 #endif
 356       fparser= tryopen(filename ? filename : PFILE1, "r");
 357     }
 358
 359                 /* JF change from inline attrs file to separate one */
 360   ftmp = tryopen(attrsfile, "w");
 361   rewind(fattrs);
 362   while((c=getc(fattrs))!=EOF)  /* Thank god for buffering */
 363     putc(c,ftmp);
 364   tryclose(fattrs);
 365   fattrs=ftmp;
 366
 367   fguard = tryopen(guardfile, "w");
 368
 369 }
 370
 371         /* JF to make file opening easier.  This func tries to open file
 372            NAME with mode MODE, and prints an error message if it fails. */
 373 FILE *
 374 tryopen (char *name, char *mode)
 375 {
 376   FILE  *ptr;
 377
 378   ptr = fopen(name, mode);
 379   if (ptr == NULL)
 380     {
 381       fprintf(stderr, "%s: ", program_name);
 382       perror(name);
 383       done(2);
 384     }
 385   return ptr;
 386 }
 387
 388 int
 389 tryclose (FILE *ptr)
 390 {
 391   int result;
 392
 393   if (ptr == NULL)
 394     return 0;
 395
 396   result = fclose (ptr);
 397   if (result == EOF)
 398     {
 399       fprintf (stderr, "%s: ", program_name);
 400       perror ("fclose");
 401       done (2);
 402     }
 403   return result;
 404 }
 405
 406 void
 407 done (int k)
 408 {
 409   tryclose(faction);
 410   tryclose(fattrs);
 411   tryclose(fguard);
 412   tryclose(finput);
 413   tryclose(fparser);
 414   tryclose(foutput);
 415
 416         /* JF write out the output file */
 417   if (k == 0 && ftable)
 418     {
 419       FILE *ftmp;
 420       register int c;
 421
 422       ftmp=tryopen(tabfile, "w");
 423       rewind(ftable);
 424       while((c=getc(ftable)) != EOF)
 425         putc(c,ftmp);
 426       tryclose(ftmp);
 427       tryclose(ftable);
 428
 429       if (definesflag)
 430         {
 431           ftmp = tryopen(defsfile, "w");
 432           fflush(fdefines);
 433           rewind(fdefines);
 434           while((c=getc(fdefines)) != EOF)
 435             putc(c,ftmp);
 436           tryclose(ftmp);
 437           tryclose(fdefines);
 438         }
 439     }
 440
 441 #if defined (VMS) & !defined (__VMS_POSIX)
 442   if (faction && ! noparserflag)
 443     delete(actfile);
 444   if (fattrs)
 445     delete(tmpattrsfile);
 446   if (ftable)
 447     delete(tmptabfile);
 448   if (k==0) sys$exit(SS$_NORMAL);
 449   sys$exit(SS$_ABORT);
 450 #else
 451 #if (defined (MSDOS) || (defined(_WIN32) && !defined(__CYGWIN32__)))
 452   if (actfile && ! noparserflag) unlink(actfile);
 453   if (tmpattrsfile) unlink(tmpattrsfile);
 454   if (tmptabfile) unlink(tmptabfile);
 455   if (tmpdefsfile) unlink(tmpdefsfile);
 456 #endif /* MSDOS || (_WIN32 && !__CYGWIN32__) */
 457   exit(k);
 458 #endif /* not VMS, or __VMS_POSIX */
 459 }