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