mcs/jay/main.c

   1 /*
   2  * Copyright (c) 1989 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Robert Paul Corbett.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #ifndef lint
  38 char copyright[] =
  39 "@(#) Copyright (c) 1989 The Regents of the University of California.\n\
  40  All rights reserved.\n";
  41 #endif /* not lint */
  42
  43 #ifndef lint
  44 static char sccsid[] = "@(#)main.c      5.5 (Berkeley) 5/24/93";
  45 #endif /* not lint */
  46
  47 #include <signal.h>
  48 #include "defs.h"
  49
  50 // FIXME autoconf or use remove instead of unlink
  51 #ifdef _MSC_VER
  52 #include <io.h>
  53 #else
  54 #include <unistd.h>
  55 #endif
  56
  57 char tflag;
  58 char vflag;
  59 int csharp = 0;
  60
  61 const char *file_prefix = (char*)"y";
  62 char *myname = (char*)"yacc";
  63 const char *temp_form = "yacc.XXXXXXX";
  64
  65 int lineno;
  66 int outline;
  67
  68 char *action_file_name;
  69 char *input_file_name = (char*)"";
  70 char *prolog_file_name;
  71 char *local_file_name;
  72 char *verbose_file_name;
  73 char *output_file_name = 0;
  74
  75 FILE *action_file;      /*  a temp file, used to save actions associated    */
  76                         /*  with rules until the parser is written          */
  77 FILE *input_file;       /*  the input file                                  */
  78 FILE *prolog_file;      /*  temp files, used to save text until all         */
  79 FILE *local_file;       /*  symbols have been defined                       */
  80 FILE *verbose_file;     /*  y.output                                        */
  81 FILE *output_file; /* defaults to stdout */
  82
  83 int nitems;
  84 int nrules;
  85 int nsyms;
  86 int ntokens;
  87 int nvars;
  88 int nmethods;
  89
  90 int   start_symbol;
  91 char  **symbol_name;
  92 short *symbol_value;
  93 short *symbol_prec;
  94 char  *symbol_assoc;
  95 char  **methods;
  96
  97 short *ritem;
  98 short *rlhs;
  99 short *rrhs;
 100 short *rprec;
 101 char  *rassoc;
 102 short **derives;
 103 char *nullable;
 104
 105 #if defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__)
 106 extern char* mktemp();
 107 #define mkstemp mktemp
 108 #endif
 109
 110 extern char *getenv();
 111
 112 void
 113 done (int k)
 114 {
 115     if (action_file) { fclose(action_file); unlink(action_file_name); }
 116     if (prolog_file) { fclose(prolog_file); unlink(prolog_file_name); }
 117     if (local_file) { fclose(local_file); unlink(local_file_name); }
 118     if (output_file && (output_file != stdout)) { fclose(output_file); if (k != 0) unlink(output_file_name); }
 119     exit(k);
 120 }
 121
 122 static void
 123 onintr (int signo)
 124 {
 125     (void)signo; // unused
 126     done(1);
 127 }
 128
 129 static void
 130 set_signals (void)
 131 {
 132 #ifdef SIGINT
 133     if (signal(SIGINT, SIG_IGN) != SIG_IGN)
 134         signal(SIGINT, onintr);
 135 #endif
 136 #ifdef SIGTERM
 137     if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
 138         signal(SIGTERM, onintr);
 139 #endif
 140 #ifdef SIGHUP
 141     if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
 142         signal(SIGHUP, onintr);
 143 #endif
 144 }
 145
 146 static void
 147 usage (void)
 148 {
 149     fprintf(stderr, "usage: %s [-tvcp] [-b file_prefix] [-o output_filename] input_filename\n", myname);
 150     exit(1);
 151 }
 152
 153 static void
 154 print_skel_dir(void)
 155 {
 156     printf ("%s\n", SKEL_DIRECTORY);
 157     exit (0);
 158 }
 159
 160 static void
 161 getargs (int argc, char *argv[])
 162 {
 163     register int i;
 164     register char *s;
 165
 166     if (argc > 0) myname = argv[0];
 167     for (i = 1; i < argc; ++i)
 168     {
 169         s = argv[i];
 170         if (*s != '-') break;
 171         switch (*++s)
 172         {
 173         case '\0':
 174             input_file = stdin;
 175             if (i + 1 < argc) usage();
 176             return;
 177
 178     case '-':
 179         ++i;
 180         goto no_more_options;
 181
 182         case 'b':
 183             if (*++s)
 184                  file_prefix = s;
 185             else if (++i < argc)
 186                 file_prefix = argv[i];
 187             else
 188                 usage();
 189             continue;
 190
 191     case 'o':
 192         if (*++s)
 193             output_file_name = s;
 194         else if (++i < argc)
 195             output_file_name = argv[i];
 196         else
 197             usage();
 198         continue;
 199
 200     case 't':
 201         tflag = 1;
 202         break;
 203
 204         case 'p':
 205         print_skel_dir ();
 206         break;
 207
 208         case 'c':
 209             csharp = 1;
 210             line_format = "#line %d \"%s\"\n";
 211             default_line_format = "#line default\n";
 212             break;
 213
 214         case 'v':
 215             vflag = 1;
 216             break;
 217
 218         default:
 219             usage();
 220         }
 221
 222         for (;;)
 223         {
 224             switch (*++s)
 225             {
 226             case '\0':
 227                 goto end_of_option;
 228
 229             case 't':
 230                 tflag = 1;
 231                 break;
 232
 233             case 'v':
 234                 vflag = 1;
 235                 break;
 236
 237         case 'p':
 238             print_skel_dir ();
 239             break;
 240
 241         case 'c':
 242                     csharp = 1;
 243                 line_format = "#line %d \"%s\"\n";
 244                 default_line_format = "#line default\n";
 245
 246                 break;
 247
 248             default:
 249                 usage();
 250             }
 251         }
 252 end_of_option:;
 253     }
 254
 255 no_more_options:;
 256     if (i + 1 != argc) usage();
 257     input_file_name = argv[i];
 258 }
 259
 260 char *
 261 allocate (unsigned n)
 262 {
 263     register char *p;
 264
 265     p = NULL;
 266     if (n)
 267     {
 268         p = (char*)CALLOC(1, n);
 269         if (!p) no_space();
 270     }
 271     return (p);
 272 }
 273
 274 #ifdef __GNUC__
 275 #define GNUC_UNUSED __attribute__((__unused__))
 276 #else
 277 #define GNUC_UNUSED
 278 #endif
 279
 280 static void
 281 create_file_names (void)
 282 {
 283     int i, len;
 284     const char *tmpdir;
 285     int mkstemp_res GNUC_UNUSED;
 286
 287 #if defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__)
 288     tmpdir = ".";
 289 #else
 290     tmpdir = getenv("TMPDIR");
 291     if (tmpdir == 0) tmpdir = getenv ("TMP");
 292     if (tmpdir == 0) tmpdir = getenv ("TEMP");
 293     if (tmpdir == 0) tmpdir = "/tmp";
 294 #endif
 295
 296     len = strlen(tmpdir);
 297     i = len + 13;
 298     if (len && tmpdir[len-1] != '/')
 299         ++i;
 300
 301     action_file_name = (char*)MALLOC(i);
 302     if (action_file_name == 0) no_space();
 303     prolog_file_name =  (char*)MALLOC(i);
 304     if (prolog_file_name == 0) no_space();
 305     local_file_name =  (char*)MALLOC(i);
 306     if (local_file_name == 0) no_space();
 307
 308     strcpy(action_file_name, tmpdir);
 309     strcpy(prolog_file_name, tmpdir);
 310     strcpy(local_file_name, tmpdir);
 311
 312     if (len && tmpdir[len - 1] != '/')
 313     {
 314         action_file_name[len] = '/';
 315         prolog_file_name[len] = '/';
 316         local_file_name[len] = '/';
 317         ++len;
 318     }
 319
 320     strcpy(action_file_name + len, temp_form);
 321     strcpy(prolog_file_name + len, temp_form);
 322     strcpy(local_file_name + len, temp_form);
 323
 324     action_file_name[len + 5] = 'a';
 325     prolog_file_name[len + 5] = 'p';
 326     local_file_name[len + 5] = 'l';
 327
 328     mkstemp_res = mkstemp(action_file_name);
 329     mkstemp_res = mkstemp(prolog_file_name);
 330     mkstemp_res = mkstemp(local_file_name);
 331
 332     len = strlen(file_prefix);
 333
 334     if (vflag)
 335     {
 336         verbose_file_name = (char*)MALLOC(len + 8);
 337         if (verbose_file_name == 0)
 338             no_space();
 339         strcpy(verbose_file_name, file_prefix);
 340         strcpy(verbose_file_name + len, VERBOSE_SUFFIX);
 341     }
 342 }
 343
 344 static void
 345 open_files (void)
 346 {
 347     create_file_names();
 348
 349     if (input_file == 0)
 350     {
 351         input_file = fopen(input_file_name, "r");
 352         if (input_file == 0)
 353             open_error(input_file_name);
 354     }
 355
 356     action_file = fopen(action_file_name, "w");
 357     if (action_file == 0)
 358         open_error(action_file_name);
 359
 360     prolog_file = fopen(prolog_file_name, "w");
 361     if (prolog_file == 0)
 362         open_error(prolog_file_name);
 363
 364     local_file = fopen(local_file_name, "w");
 365     if (local_file == 0)
 366         open_error(local_file_name);
 367
 368     if (vflag)
 369     {
 370         verbose_file = fopen(verbose_file_name, "w");
 371         if (verbose_file == 0)
 372             open_error(verbose_file_name);
 373     }
 374
 375     if (output_file == 0)
 376     {
 377         if (output_file_name != 0) {
 378             output_file = fopen(output_file_name, "w");
 379             if (output_file == 0)
 380                 open_error(output_file_name);
 381         } else {
 382             output_file = stdout;
 383         }
 384     }
 385 }
 386
 387
 388 int
 389 main (int argc, char *argv[])
 390 {
 391     set_signals();
 392     getargs(argc, argv);
 393     open_files();
 394     reader();
 395     lr0();
 396     lalr();
 397     make_parser();
 398     verbose();
 399     output();
 400     done(0);
 401     /*NOTREACHED*/
 402 }