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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20
  21 #if defined (VMS) & !defined (__VMS_POSIX)
  22 #include <ssdef.h>
  23 #define unlink delete
  24 #ifndef XPFILE
  25 #define XPFILE "GNU_BISON:[000000]BISON.SIMPLE"
  26 #endif
  27 #ifndef XPFILE1
  28 #define XPFILE1 "GNU_BISON:[000000]BISON.HAIRY"
  29 #endif
  30 #endif
  31
  32 #if defined (_MSC_VER)
  33 #ifndef XPFILE
  34 #define XPFILE "c:/usr/local/lib/bison.simple"
  35 #endif
  36 #ifndef XPFILE1
  37 #define XPFILE1 "c:/usr/local/lib/bison.hairy"
  38 #endif
  39 #endif
  40
  41 #include <stdio.h>
  42 #include "system.h"
  43 #include "files.h"
  44 #include "alloc.h"
  45 #include "gram.h"
  46
  47 FILE *finput = NULL;
  48 FILE *foutput = NULL;
  49 FILE *fdefines = NULL;
  50 FILE *ftable = NULL;
  51 FILE *fattrs = NULL;
  52 FILE *fguard = NULL;
  53 FILE *faction = NULL;
  54 FILE *fparser = NULL;
  55
  56 /* File name specified with -o for the output file, or 0 if no -o.  */
  57 char *spec_outfile;
  58
  59 char *infile;
  60 char *outfile;
  61 char *defsfile;
  62 char *tabfile;
  63 char *attrsfile;
  64 char *guardfile;
  65 char *actfile;
  66 char *tmpattrsfile;
  67 char *tmptabfile;
  68 char *tmpdefsfile;
  69
  70 extern int noparserflag;
  71
  72 extern char     *mktemp();      /* So the compiler won't complain */
  73 extern char     *getenv();
  74 extern void     perror();
  75 FILE    *tryopen();     /* This might be a good idea */
  76 void done();
  77
  78 extern char *program_name;
  79 extern int verboseflag;
  80 extern int definesflag;
  81 int fixed_outfiles = 0;
  82 \f
  83
  84 char*
  85 stringappend(string1, end1, string2)
  86 char *string1;
  87 int end1;
  88 char *string2;
  89 {
  90   register char *ostring;
  91   register char *cp, *cp1;
  92   register int i;
  93
  94   cp = string2;  i = 0;
  95   while (*cp++) i++;
  96
  97   ostring = NEW2(i+end1+1, char);
  98
  99   cp = ostring;
 100   cp1 = string1;
 101   for (i = 0; i < end1; i++)
 102     *cp++ = *cp1++;
 103
 104   cp1 = string2;
 105   while (*cp++ = *cp1++) ;
 106
 107   return ostring;
 108 }
 109
 110
 111 /* JF this has been hacked to death.  Nowaday it sets up the file names for
 112    the output files, and opens the tmp files and the parser */
 113 void
 114 openfiles()
 115 {
 116   char *name_base;
 117   register char *cp;
 118   char *filename;
 119   int base_length;
 120   int short_base_length;
 121
 122 #if defined (VMS) & !defined (__VMS_POSIX)
 123   char *tmp_base = "sys$scratch:b_";
 124 #else
 125   char *tmp_base = "/tmp/b.";
 126 #endif
 127   int tmp_len;
 128
 129 #ifdef MSDOS
 130   tmp_base = getenv ("TMP");
 131   if (tmp_base == 0)
 132     tmp_base = "";
 133   strlwr (infile);
 134 #endif /* MSDOS */
 135
 136   tmp_len = strlen (tmp_base);
 137
 138   if (spec_outfile)
 139     {
 140       /* -o was specified.  The precise -o name will be used for ftable.
 141          For other output files, remove the ".c" or ".tab.c" suffix.  */
 142       name_base = spec_outfile;
 143 #ifdef MSDOS
 144       strlwr (name_base);
 145 #endif /* MSDOS */
 146       /* BASE_LENGTH includes ".tab" but not ".c".  */
 147       base_length = strlen (name_base);
 148       if (!strcmp (name_base + base_length - 2, ".c"))
 149         base_length -= 2;
 150       /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c".  */
 151       short_base_length = base_length;
 152       if (!strncmp (name_base + short_base_length - 4, ".tab", 4))
 153         short_base_length -= 4;
 154       else if (!strncmp (name_base + short_base_length - 4, "_tab", 4))
 155         short_base_length -= 4;
 156     }
 157   else if (spec_file_prefix)
 158     {
 159       /* -b was specified.  Construct names from it.  */
 160       /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c".  */
 161       short_base_length = strlen (spec_file_prefix);
 162       /* Count room for `.tab'.  */
 163       base_length = short_base_length + 4;
 164       name_base = (char *) xmalloc (base_length + 1);
 165       /* Append `.tab'.  */
 166       strcpy (name_base, spec_file_prefix);
 167 #ifdef VMS
 168       strcat (name_base, "_tab");
 169 #else
 170       strcat (name_base, ".tab");
 171 #endif
 172 #ifdef MSDOS
 173       strlwr (name_base);
 174 #endif /* MSDOS */
 175     }
 176   else
 177     {
 178       /* -o was not specified; compute output file name from input
 179          or use y.tab.c, etc., if -y was specified.  */
 180
 181       name_base = fixed_outfiles ? "y.y" : infile;
 182
 183       /* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any.  */
 184
 185       base_length = strlen (name_base);
 186       if (!strcmp (name_base + base_length - 2, ".y"))
 187         base_length -= 2;
 188       short_base_length = base_length;
 189
 190 #ifdef VMS
 191       name_base = stringappend(name_base, short_base_length, "_tab");
 192 #else
 193 #ifdef MSDOS
 194       name_base = stringappend(name_base, short_base_length, "_tab");
 195 #else
 196       name_base = stringappend(name_base, short_base_length, ".tab");
 197 #endif /* not MSDOS */
 198 #endif
 199       base_length = short_base_length + 4;
 200     }
 201
 202   finput = tryopen(infile, "r");
 203
 204   if (! noparserflag)
 205     {
 206       filename = getenv("BISON_SIMPLE");
 207 #ifdef MSDOS
 208       /* File doesn't exist in current directory; try in INIT directory.  */
 209       cp = getenv("INIT");
 210       if (filename == 0 && cp != NULL)
 211         {
 212           filename = xmalloc(strlen(cp) + strlen(PFILE) + 2);
 213           strcpy(filename, cp);
 214           cp = filename + strlen(filename);
 215           *cp++ = '/';
 216           strcpy(cp, PFILE);
 217         }
 218 #endif /* MSDOS */
 219       fparser = tryopen(filename ? filename : PFILE, "r");
 220     }
 221
 222   if (verboseflag)
 223     {
 224 #ifdef MSDOS
 225       outfile = stringappend(name_base, short_base_length, ".out");
 226 #else
 227       /* We used to use just .out if spec_name_prefix (-p) was used,
 228          but that conflicts with Posix.  */
 229       outfile = stringappend(name_base, short_base_length, ".output");
 230 #endif
 231       foutput = tryopen(outfile, "w");
 232     }
 233
 234   if (noparserflag)
 235     {
 236       /* use permanent name for actions file */
 237       actfile = stringappend(name_base, short_base_length, ".act");
 238       faction = tryopen(actfile, "w");
 239     }
 240
 241 #ifdef MSDOS
 242   if (! noparserflag)
 243     actfile = mktemp(stringappend(tmp_base, tmp_len, "acXXXXXX"));
 244   tmpattrsfile = mktemp(stringappend(tmp_base, tmp_len, "atXXXXXX"));
 245   tmptabfile = mktemp(stringappend(tmp_base, tmp_len, "taXXXXXX"));
 246   tmpdefsfile = mktemp(stringappend(tmp_base, tmp_len, "deXXXXXX"));
 247 #else
 248   if (! noparserflag)
 249     actfile = mktemp(stringappend(tmp_base, tmp_len, "act.XXXXXX"));
 250   tmpattrsfile = mktemp(stringappend(tmp_base, tmp_len, "attrs.XXXXXX"));
 251   tmptabfile = mktemp(stringappend(tmp_base, tmp_len, "tab.XXXXXX"));
 252   tmpdefsfile = mktemp(stringappend(tmp_base, tmp_len, "defs.XXXXXX"));
 253 #endif /* not MSDOS */
 254
 255   if (! noparserflag)
 256     faction = tryopen(actfile, "w+");
 257   fattrs = tryopen(tmpattrsfile,"w+");
 258   ftable = tryopen(tmptabfile, "w+");
 259
 260   if (definesflag)
 261     {
 262       defsfile = stringappend(name_base, base_length, ".h");
 263       fdefines = tryopen(tmpdefsfile, "w+");
 264     }
 265
 266 #ifndef MSDOS
 267   if (! noparserflag)
 268     unlink(actfile);
 269   unlink(tmpattrsfile);
 270   unlink(tmptabfile);
 271   unlink(tmpdefsfile);
 272 #endif
 273
 274         /* These are opened by `done' or `open_extra_files', if at all */
 275   if (spec_outfile)
 276     tabfile = spec_outfile;
 277   else
 278     tabfile = stringappend(name_base, base_length, ".c");
 279
 280 #ifdef VMS
 281   attrsfile = stringappend(name_base, short_base_length, "_stype.h");
 282   guardfile = stringappend(name_base, short_base_length, "_guard.c");
 283 #else
 284 #ifdef MSDOS
 285   attrsfile = stringappend(name_base, short_base_length, ".sth");
 286   guardfile = stringappend(name_base, short_base_length, ".guc");
 287 #else
 288   attrsfile = stringappend(name_base, short_base_length, ".stype.h");
 289   guardfile = stringappend(name_base, short_base_length, ".guard.c");
 290 #endif /* not MSDOS */
 291 #endif /* not VMS */
 292 }
 293
 294
 295
 296 /* open the output files needed only for the semantic parser.
 297 This is done when %semantic_parser is seen in the declarations section.  */
 298
 299 void
 300 open_extra_files()
 301 {
 302   FILE *ftmp;
 303   int c;
 304   char *filename, *cp;
 305
 306   if (fparser)
 307     fclose(fparser);
 308
 309   if (! noparserflag)
 310     {
 311       filename = (char *) getenv ("BISON_HAIRY");
 312 #ifdef MSDOS
 313       /* File doesn't exist in current directory; try in INIT directory.  */
 314       cp = getenv("INIT");
 315       if (filename == 0 && cp != NULL)
 316         {
 317           filename = xmalloc(strlen(cp) + strlen(PFILE1) + 2);
 318           strcpy(filename, cp);
 319           cp = filename + strlen(filename);
 320           *cp++ = '/';
 321           strcpy(cp, PFILE1);
 322         }
 323 #endif
 324       fparser= tryopen(filename ? filename : PFILE1, "r");
 325     }
 326
 327                 /* JF change from inline attrs file to separate one */
 328   ftmp = tryopen(attrsfile, "w");
 329   rewind(fattrs);
 330   while((c=getc(fattrs))!=EOF)  /* Thank god for buffering */
 331     putc(c,ftmp);
 332   fclose(fattrs);
 333   fattrs=ftmp;
 334
 335   fguard = tryopen(guardfile, "w");
 336
 337 }
 338
 339         /* JF to make file opening easier.  This func tries to open file
 340            NAME with mode MODE, and prints an error message if it fails. */
 341 FILE *
 342 tryopen(name, mode)
 343 char *name;
 344 char *mode;
 345 {
 346   FILE  *ptr;
 347
 348   ptr = fopen(name, mode);
 349   if (ptr == NULL)
 350     {
 351       fprintf(stderr, "%s: ", program_name);
 352       perror(name);
 353       done(2);
 354     }
 355   return ptr;
 356 }
 357
 358 void
 359 done(k)
 360 int k;
 361 {
 362   if (faction)
 363     fclose(faction);
 364
 365   if (fattrs)
 366     fclose(fattrs);
 367
 368   if (fguard)
 369     fclose(fguard);
 370
 371   if (finput)
 372     fclose(finput);
 373
 374   if (fparser)
 375     fclose(fparser);
 376
 377   if (foutput)
 378     fclose(foutput);
 379
 380         /* JF write out the output file */
 381   if (k == 0 && ftable)
 382     {
 383       FILE *ftmp;
 384       register int c;
 385
 386       ftmp=tryopen(tabfile, "w");
 387       rewind(ftable);
 388       while((c=getc(ftable)) != EOF)
 389         putc(c,ftmp);
 390       fclose(ftmp);
 391       fclose(ftable);
 392
 393       if (definesflag)
 394         {
 395           ftmp = tryopen(defsfile, "w");
 396           fflush(fdefines);
 397           rewind(fdefines);
 398           while((c=getc(fdefines)) != EOF)
 399             putc(c,ftmp);
 400           fclose(ftmp);
 401           fclose(fdefines);
 402         }
 403     }
 404
 405 #if defined (VMS) & !defined (__VMS_POSIX)
 406   if (faction && ! noparserflag)
 407     delete(actfile);
 408   if (fattrs)
 409     delete(tmpattrsfile);
 410   if (ftable)
 411     delete(tmptabfile);
 412   if (k==0) sys$exit(SS$_NORMAL);
 413   sys$exit(SS$_ABORT);
 414 #else
 415 #ifdef MSDOS
 416   if (actfile && ! noparserflag) unlink(actfile);
 417   if (tmpattrsfile) unlink(tmpattrsfile);
 418   if (tmptabfile) unlink(tmptabfile);
 419   if (tmpdefsfile) unlink(tmpdefsfile);
 420 #endif /* MSDOS */
 421   exit(k);
 422 #endif /* not VMS, or __VMS_POSIX */
 423 }