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 char tflag;
  51 char vflag;
  52 int csharp = 0;
  53
  54 char *file_prefix = "y";
  55 char *myname = "yacc";
  56 char *temp_form = "yacc.XXXXXXX";
  57
  58 int lineno;
  59 int outline;
  60
  61 char *action_file_name;
  62 char *input_file_name = "";
  63 char *prolog_file_name;
  64 char *local_file_name;
  65 char *verbose_file_name;
  66
  67 FILE *action_file;      /*  a temp file, used to save actions associated    */
  68                         /*  with rules until the parser is written          */
  69 FILE *input_file;       /*  the input file                                  */
  70 FILE *prolog_file;      /*  temp files, used to save text until all         */
  71 FILE *local_file;       /*  symbols have been defined                       */
  72 FILE *verbose_file;     /*  y.output                                        */
  73
  74 int nitems;
  75 int nrules;
  76 int nsyms;
  77 int ntokens;
  78 int nvars;
  79 int nmethods;
  80
  81 int   start_symbol;
  82 char  **symbol_name;
  83 short *symbol_value;
  84 short *symbol_prec;
  85 char  *symbol_assoc;
  86 char  **methods;
  87
  88 short *ritem;
  89 short *rlhs;
  90 short *rrhs;
  91 short *rprec;
  92 char  *rassoc;
  93 short **derives;
  94 char *nullable;
  95
  96 #if defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__)
  97 extern char* mktemp();
  98 #define mkstemp mktemp
  99 #endif
 100
 101 extern char *getenv();
 102
 103 done(k)
 104 int k;
 105 {
 106     if (action_file) { fclose(action_file); unlink(action_file_name); }
 107     if (prolog_file) { fclose(prolog_file); unlink(prolog_file_name); }
 108     if (local_file) { fclose(local_file); unlink(local_file_name); }
 109     exit(k);
 110 }
 111
 112
 113 void
 114 onintr(signo)
 115         int signo;
 116 {
 117     done(1);
 118 }
 119
 120
 121 set_signals()
 122 {
 123 #ifdef SIGINT
 124     if (signal(SIGINT, SIG_IGN) != SIG_IGN)
 125         signal(SIGINT, onintr);
 126 #endif
 127 #ifdef SIGTERM
 128     if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
 129         signal(SIGTERM, onintr);
 130 #endif
 131 #ifdef SIGHUP
 132     if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
 133         signal(SIGHUP, onintr);
 134 #endif
 135 }
 136
 137
 138 usage()
 139 {
 140     fprintf(stderr, "usage: %s [-tvcp] [-b file_prefix] filename\n", myname);
 141     exit(1);
 142 }
 143
 144 void
 145 print_skel_dir(void)
 146 {
 147     printf ("%s\n", SKEL_DIRECTORY);
 148     exit (0);
 149 }
 150
 151 getargs(argc, argv)
 152 int argc;
 153 char *argv[];
 154 {
 155     register int i;
 156     register char *s;
 157
 158     if (argc > 0) myname = argv[0];
 159     for (i = 1; i < argc; ++i)
 160     {
 161         s = argv[i];
 162         if (*s != '-') break;
 163         switch (*++s)
 164         {
 165         case '\0':
 166             input_file = stdin;
 167             if (i + 1 < argc) usage();
 168             return;
 169
 170         case '-':
 171             ++i;
 172             goto no_more_options;
 173
 174         case 'b':
 175             if (*++s)
 176                  file_prefix = s;
 177             else if (++i < argc)
 178                 file_prefix = argv[i];
 179             else
 180                 usage();
 181             continue;
 182
 183         case 't':
 184             tflag = 1;
 185             break;
 186
 187         case 'p':
 188             print_skel_dir ();
 189             break;
 190
 191         case 'c':
 192             csharp = 1;
 193             line_format = "#line %d \"%s\"\n";
 194             default_line_format = "#line default\n";
 195             break;
 196
 197         case 'v':
 198             vflag = 1;
 199             break;
 200
 201         default:
 202             usage();
 203         }
 204
 205         for (;;)
 206         {
 207             switch (*++s)
 208             {
 209             case '\0':
 210                 goto end_of_option;
 211
 212             case 't':
 213                 tflag = 1;
 214                 break;
 215
 216             case 'v':
 217                 vflag = 1;
 218                 break;
 219
 220             case 'p':
 221                 print_skel_dir ();
 222                 break;
 223
 224             case 'c':
 225                 csharp = 1;
 226                 line_format = "#line %d \"%s\"\n";
 227                 default_line_format = "#line default\n";
 228
 229                 break;
 230
 231             default:
 232                 usage();
 233             }
 234         }
 235 end_of_option:;
 236     }
 237
 238 no_more_options:;
 239     if (i + 1 != argc) usage();
 240     input_file_name = argv[i];
 241 }
 242
 243
 244 char *
 245 allocate(n)
 246 unsigned n;
 247 {
 248     register char *p;
 249
 250     p = NULL;
 251     if (n)
 252     {
 253         p = CALLOC(1, n);
 254         if (!p) no_space();
 255     }
 256     return (p);
 257 }
 258
 259 #ifdef __GNUC__
 260 #define GNUC_UNUSED __attribute__((__unused__))
 261 #else
 262 #define GNUC_UNUSED
 263 #endif
 264
 265 create_file_names()
 266 {
 267     int i, len;
 268     char *tmpdir;
 269     int mkstemp_res GNUC_UNUSED;
 270
 271 #if defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__)
 272     tmpdir = ".";
 273 #else
 274     tmpdir = getenv("TMPDIR");
 275     if (tmpdir == 0) tmpdir = getenv ("TMP");
 276     if (tmpdir == 0) tmpdir = getenv ("TEMP");
 277     if (tmpdir == 0) tmpdir = "/tmp";
 278 #endif
 279
 280     len = strlen(tmpdir);
 281     i = len + 13;
 282     if (len && tmpdir[len-1] != '/')
 283         ++i;
 284
 285     action_file_name = MALLOC(i);
 286     if (action_file_name == 0) no_space();
 287     prolog_file_name = MALLOC(i);
 288     if (prolog_file_name == 0) no_space();
 289     local_file_name = MALLOC(i);
 290     if (local_file_name == 0) no_space();
 291
 292     strcpy(action_file_name, tmpdir);
 293     strcpy(prolog_file_name, tmpdir);
 294     strcpy(local_file_name, tmpdir);
 295
 296     if (len && tmpdir[len - 1] != '/')
 297     {
 298         action_file_name[len] = '/';
 299         prolog_file_name[len] = '/';
 300         local_file_name[len] = '/';
 301         ++len;
 302     }
 303
 304     strcpy(action_file_name + len, temp_form);
 305     strcpy(prolog_file_name + len, temp_form);
 306     strcpy(local_file_name + len, temp_form);
 307
 308     action_file_name[len + 5] = 'a';
 309     prolog_file_name[len + 5] = 'p';
 310     local_file_name[len + 5] = 'l';
 311
 312     mkstemp_res = mkstemp(action_file_name);
 313     mkstemp_res = mkstemp(prolog_file_name);
 314     mkstemp_res = mkstemp(local_file_name);
 315
 316     len = strlen(file_prefix);
 317
 318     if (vflag)
 319     {
 320         verbose_file_name = MALLOC(len + 8);
 321         if (verbose_file_name == 0)
 322             no_space();
 323         strcpy(verbose_file_name, file_prefix);
 324         strcpy(verbose_file_name + len, VERBOSE_SUFFIX);
 325     }
 326 }
 327
 328
 329 open_files()
 330 {
 331     create_file_names();
 332
 333     if (input_file == 0)
 334     {
 335         input_file = fopen(input_file_name, "r");
 336         if (input_file == 0)
 337             open_error(input_file_name);
 338     }
 339
 340     action_file = fopen(action_file_name, "w");
 341     if (action_file == 0)
 342         open_error(action_file_name);
 343
 344     prolog_file = fopen(prolog_file_name, "w");
 345     if (prolog_file == 0)
 346         open_error(prolog_file_name);
 347
 348     local_file = fopen(local_file_name, "w");
 349     if (local_file == 0)
 350         open_error(local_file_name);
 351
 352     if (vflag)
 353     {
 354         verbose_file = fopen(verbose_file_name, "w");
 355         if (verbose_file == 0)
 356             open_error(verbose_file_name);
 357     }
 358 }
 359
 360
 361 int
 362 main(argc, argv)
 363 int argc;
 364 char *argv[];
 365 {
 366     set_signals();
 367     getargs(argc, argv);
 368     open_files();
 369     reader();
 370     lr0();
 371     lalr();
 372     make_parser();
 373     verbose();
 374     output();
 375     done(0);
 376     /*NOTREACHED*/
 377 }