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 #if (defined(_WIN32) && !defined(__CYGWIN32__))
 137   tmp_base = getenv ("TEMP");           /* Windows95 defines this ... */
 138   if (tmp_base == 0)
 139     tmp_base = getenv ("Temp");         /* ... while NT prefers this */
 140   if (tmp_base == 0)
 141     tmp_base = "";
 142   strlwr (infile);
 143 #endif /* _WIN32 && !__CYGWIN32__ */
 144
 145   tmp_len = strlen (tmp_base);
 146
 147   if (spec_outfile)
 148     {
 149       /* -o was specified.  The precise -o name will be used for ftable.
 150          For other output files, remove the ".c" or ".tab.c" suffix.  */
 151       name_base = spec_outfile;
 152 #ifdef MSDOS
 153       strlwr (name_base);
 154 #endif /* MSDOS */
 155       /* BASE_LENGTH includes ".tab" but not ".c".  */
 156       base_length = strlen (name_base);
 157       if (!strcmp (name_base + base_length - 2, ".c"))
 158         base_length -= 2;
 159       /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c".  */
 160       short_base_length = base_length;
 161       if (!strncmp (name_base + short_base_length - 4, ".tab", 4))
 162         short_base_length -= 4;
 163       else if (!strncmp (name_base + short_base_length - 4, "_tab", 4))
 164         short_base_length -= 4;
 165     }
 166   else if (spec_file_prefix)
 167     {
 168       /* -b was specified.  Construct names from it.  */
 169       /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c".  */
 170       short_base_length = strlen (spec_file_prefix);
 171       /* Count room for `.tab'.  */
 172       base_length = short_base_length + 4;
 173       name_base = (char *) xmalloc (base_length + 1);
 174       /* Append `.tab'.  */
 175       strcpy (name_base, spec_file_prefix);
 176 #ifdef VMS
 177       strcat (name_base, "_tab");
 178 #else
 179       strcat (name_base, ".tab");
 180 #endif
 181 #ifdef MSDOS
 182       strlwr (name_base);
 183 #endif /* MSDOS */
 184     }
 185   else
 186     {
 187       /* -o was not specified; compute output file name from input
 188          or use y.tab.c, etc., if -y was specified.  */
 189
 190       name_base = fixed_outfiles ? "y.y" : infile;
 191
 192       /* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any.  */
 193
 194       base_length = strlen (name_base);
 195       if (!strcmp (name_base + base_length - 2, ".y"))
 196         base_length -= 2;
 197       short_base_length = base_length;
 198
 199 #ifdef VMS
 200       name_base = stringappend(name_base, short_base_length, "_tab");
 201 #else
 202 #ifdef MSDOS
 203       name_base = stringappend(name_base, short_base_length, "_tab");
 204 #else
 205       name_base = stringappend(name_base, short_base_length, ".tab");
 206 #endif /* not MSDOS */
 207 #endif
 208       base_length = short_base_length + 4;
 209     }
 210
 211   finput = tryopen(infile, "r");
 212
 213   if (! noparserflag)
 214     {
 215       filename = getenv("BISON_SIMPLE");
 216 #ifdef MSDOS
 217       /* File doesn't exist in current directory; try in INIT directory.  */
 218       cp = getenv("INIT");
 219       if (filename == 0 && cp != NULL)
 220         {
 221           filename = xmalloc(strlen(cp) + strlen(PFILE) + 2);
 222           strcpy(filename, cp);
 223           cp = filename + strlen(filename);
 224           *cp++ = '/';
 225           strcpy(cp, PFILE);
 226         }
 227 #endif /* MSDOS */
 228       fparser = tryopen(filename ? filename : PFILE, "r");
 229     }
 230
 231   if (verboseflag)
 232     {
 233 #ifdef MSDOS
 234       outfile = stringappend(name_base, short_base_length, ".out");
 235 #else
 236       /* We used to use just .out if spec_name_prefix (-p) was used,
 237          but that conflicts with Posix.  */
 238       outfile = stringappend(name_base, short_base_length, ".output");
 239 #endif
 240       foutput = tryopen(outfile, "w");
 241     }
 242
 243   if (noparserflag)
 244     {
 245       /* use permanent name for actions file */
 246       actfile = stringappend(name_base, short_base_length, ".act");
 247       faction = tryopen(actfile, "w");
 248     }
 249
 250 #ifdef MSDOS
 251   if (! noparserflag)
 252     actfile = mktemp(stringappend(tmp_base, tmp_len, "acXXXXXX"));
 253   tmpattrsfile = mktemp(stringappend(tmp_base, tmp_len, "atXXXXXX"));
 254   tmptabfile = mktemp(stringappend(tmp_base, tmp_len, "taXXXXXX"));
 255   tmpdefsfile = mktemp(stringappend(tmp_base, tmp_len, "deXXXXXX"));
 256 #else
 257   if (! noparserflag)
 258     actfile = mktemp(stringappend(tmp_base, tmp_len, "act.XXXXXX"));
 259   tmpattrsfile = mktemp(stringappend(tmp_base, tmp_len, "attrs.XXXXXX"));
 260   tmptabfile = mktemp(stringappend(tmp_base, tmp_len, "tab.XXXXXX"));
 261   tmpdefsfile = mktemp(stringappend(tmp_base, tmp_len, "defs.XXXXXX"));
 262 #endif /* not MSDOS */
 263
 264   if (! noparserflag)
 265     faction = tryopen(actfile, "w+");
 266   fattrs = tryopen(tmpattrsfile,"w+");
 267   ftable = tryopen(tmptabfile, "w+");
 268
 269   if (definesflag)
 270     {
 271       defsfile = stringappend(name_base, base_length, ".h");
 272       fdefines = tryopen(tmpdefsfile, "w+");
 273     }
 274
 275 #if !(defined (MSDOS) || (defined(_WIN32) && !defined(__CYGWIN32__)))
 276   if (! noparserflag)
 277     unlink(actfile);
 278   unlink(tmpattrsfile);
 279   unlink(tmptabfile);
 280   unlink(tmpdefsfile);
 281 #endif /* MSDOS || (_WIN32 && !__CYGWIN32__) */
 282
 283         /* These are opened by `done' or `open_extra_files', if at all */
 284   if (spec_outfile)
 285     tabfile = spec_outfile;
 286   else
 287     tabfile = stringappend(name_base, base_length, ".c");
 288
 289 #ifdef VMS
 290   attrsfile = stringappend(name_base, short_base_length, "_stype.h");
 291   guardfile = stringappend(name_base, short_base_length, "_guard.c");
 292 #else
 293 #ifdef MSDOS
 294   attrsfile = stringappend(name_base, short_base_length, ".sth");
 295   guardfile = stringappend(name_base, short_base_length, ".guc");
 296 #else
 297   attrsfile = stringappend(name_base, short_base_length, ".stype.h");
 298   guardfile = stringappend(name_base, short_base_length, ".guard.c");
 299 #endif /* not MSDOS */
 300 #endif /* not VMS */
 301 }
 302
 303
 304
 305 /* open the output files needed only for the semantic parser.
 306 This is done when %semantic_parser is seen in the declarations section.  */
 307
 308 void
 309 open_extra_files()
 310 {
 311   FILE *ftmp;
 312   int c;
 313   char *filename, *cp;
 314
 315   if (fparser)
 316     fclose(fparser);
 317
 318   if (! noparserflag)
 319     {
 320       filename = (char *) getenv ("BISON_HAIRY");
 321 #ifdef MSDOS
 322       /* File doesn't exist in current directory; try in INIT directory.  */
 323       cp = getenv("INIT");
 324       if (filename == 0 && cp != NULL)
 325         {
 326           filename = xmalloc(strlen(cp) + strlen(PFILE1) + 2);
 327           strcpy(filename, cp);
 328           cp = filename + strlen(filename);
 329           *cp++ = '/';
 330           strcpy(cp, PFILE1);
 331         }
 332 #endif
 333       fparser= tryopen(filename ? filename : PFILE1, "r");
 334     }
 335
 336                 /* JF change from inline attrs file to separate one */
 337   ftmp = tryopen(attrsfile, "w");
 338   rewind(fattrs);
 339   while((c=getc(fattrs))!=EOF)  /* Thank god for buffering */
 340     putc(c,ftmp);
 341   fclose(fattrs);
 342   fattrs=ftmp;
 343
 344   fguard = tryopen(guardfile, "w");
 345
 346 }
 347
 348         /* JF to make file opening easier.  This func tries to open file
 349            NAME with mode MODE, and prints an error message if it fails. */
 350 FILE *
 351 tryopen(name, mode)
 352 char *name;
 353 char *mode;
 354 {
 355   FILE  *ptr;
 356
 357   ptr = fopen(name, mode);
 358   if (ptr == NULL)
 359     {
 360       fprintf(stderr, "%s: ", program_name);
 361       perror(name);
 362       done(2);
 363     }
 364   return ptr;
 365 }
 366
 367 void
 368 done(k)
 369 int k;
 370 {
 371   if (faction)
 372     fclose(faction);
 373
 374   if (fattrs)
 375     fclose(fattrs);
 376
 377   if (fguard)
 378     fclose(fguard);
 379
 380   if (finput)
 381     fclose(finput);
 382
 383   if (fparser)
 384     fclose(fparser);
 385
 386   if (foutput)
 387     fclose(foutput);
 388
 389         /* JF write out the output file */
 390   if (k == 0 && ftable)
 391     {
 392       FILE *ftmp;
 393       register int c;
 394
 395       ftmp=tryopen(tabfile, "w");
 396       rewind(ftable);
 397       while((c=getc(ftable)) != EOF)
 398         putc(c,ftmp);
 399       fclose(ftmp);
 400       fclose(ftable);
 401
 402       if (definesflag)
 403         {
 404           ftmp = tryopen(defsfile, "w");
 405           fflush(fdefines);
 406           rewind(fdefines);
 407           while((c=getc(fdefines)) != EOF)
 408             putc(c,ftmp);
 409           fclose(ftmp);
 410           fclose(fdefines);
 411         }
 412     }
 413
 414 #if defined (VMS) & !defined (__VMS_POSIX)
 415   if (faction && ! noparserflag)
 416     delete(actfile);
 417   if (fattrs)
 418     delete(tmpattrsfile);
 419   if (ftable)
 420     delete(tmptabfile);
 421   if (k==0) sys$exit(SS$_NORMAL);
 422   sys$exit(SS$_ABORT);
 423 #else
 424 #if (defined (MSDOS) || (defined(_WIN32) && !defined(__CYGWIN32__)))
 425   if (actfile && ! noparserflag) unlink(actfile);
 426   if (tmpattrsfile) unlink(tmpattrsfile);
 427   if (tmptabfile) unlink(tmptabfile);
 428   if (tmpdefsfile) unlink(tmpdefsfile);
 429 #endif /* MSDOS || (_WIN32 && !__CYGWIN32__) */
 430   exit(k);
 431 #endif /* not VMS, or __VMS_POSIX */
 432 }