sunrpc/rpc_util.c

   1 /*
   2  * From: @(#)rpc_util.c 1.11 89/02/22 (C) 1987 SMI
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  *       notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  *       copyright notice, this list of conditions and the following
  12  *       disclaimer in the documentation and/or other materials
  13  *       provided with the distribution.
  14  *     * Neither the name of Sun Microsystems, Inc. nor the names of its
  15  *       contributors may be used to endorse or promote products derived
  16  *       from this software without specific prior written permission.
  17  *
  18  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  21  *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  22  *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  23  *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  25  *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  27  *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  28  *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * rpc_util.c, Utility routines for the RPC protocol compiler
  34  */
  35 #include <stdio.h>
  36 #include <ctype.h>
  37 #include <string.h>
  38 #include <unistd.h>
  39 #include "rpc_scan.h"
  40 #include "rpc_parse.h"
  41 #include "rpc_util.h"
  42 #include "proto.h"
  43
  44 #define ARGEXT "argument"
  45
  46 char curline[MAXLINESIZE];      /* current read line */
  47 const char *where = curline;    /* current point in line */
  48 int linenum = 0;                /* current line number */
  49
  50 const char *infilename;         /* input filename */
  51
  52 #define NFILES 7
  53 const char *outfiles[NFILES];   /* output file names */
  54 int nfiles;
  55
  56 FILE *fout;                     /* file pointer of current output */
  57 FILE *fin;                      /* file pointer of current input */
  58
  59 list *defined;                  /* list of defined things */
  60
  61 static int findit (const definition * def, const char *type);
  62 static const char *fixit (const char *type, const char *orig);
  63 static int typedefed (const definition * def, const char *type);
  64 static const char *toktostr (tok_kind kind);
  65 static void printbuf (void);
  66 static void printwhere (void);
  67
  68 /*
  69  * Reinitialize the world
  70  */
  71 void
  72 reinitialize (void)
  73 {
  74   memset (curline, 0, MAXLINESIZE);
  75   where = curline;
  76   linenum = 0;
  77   defined = NULL;
  78 }
  79
  80 /*
  81  * string equality
  82  */
  83 int
  84 streq (const char *a, const char *b)
  85 {
  86   return strcmp (a, b) == 0;
  87 }
  88
  89 /*
  90  * find a value in a list
  91  */
  92 definition *
  93 findval (list *lst, const char *val,
  94          int (*cmp) (const definition *, const char *))
  95 {
  96
  97   for (; lst != NULL; lst = lst->next)
  98     {
  99       if (cmp (lst->val, val))
 100         {
 101           return lst->val;
 102         }
 103     }
 104   return NULL;
 105 }
 106
 107 /*
 108  * store a value in a list
 109  */
 110 void
 111 storeval (list **lstp, definition *val)
 112 {
 113   list **l;
 114   list *lst;
 115
 116
 117   for (l = lstp; *l != NULL; l = (list **) & (*l)->next);
 118   lst = ALLOC (list);
 119   lst->val = val;
 120   lst->next = NULL;
 121   *l = lst;
 122 }
 123
 124 static int
 125 findit (const definition * def, const char *type)
 126 {
 127   return streq (def->def_name, type);
 128 }
 129
 130 static const char *
 131 fixit (const char *type, const char *orig)
 132 {
 133   definition *def;
 134
 135   def = findval (defined, type, findit);
 136   if (def == NULL || def->def_kind != DEF_TYPEDEF)
 137     {
 138       return orig;
 139     }
 140   switch (def->def.ty.rel)
 141     {
 142     case REL_VECTOR:
 143       if (streq (def->def.ty.old_type, "opaque"))
 144         return ("char");
 145       else
 146         return (def->def.ty.old_type);
 147     case REL_ALIAS:
 148       return (fixit (def->def.ty.old_type, orig));
 149     default:
 150       return orig;
 151     }
 152 }
 153
 154 const char *
 155 fixtype (const char *type)
 156 {
 157   return fixit (type, type);
 158 }
 159
 160 const char *
 161 stringfix (const char *type)
 162 {
 163   if (streq (type, "string"))
 164     {
 165       return "wrapstring";
 166     }
 167   else
 168     {
 169       return type;
 170     }
 171 }
 172
 173 void
 174 ptype (const char *prefix, const char *type, int follow)
 175 {
 176   if (prefix != NULL)
 177     {
 178       if (streq (prefix, "enum"))
 179         {
 180           f_print (fout, "enum ");
 181         }
 182       else
 183         {
 184           f_print (fout, "struct ");
 185         }
 186     }
 187   if (streq (type, "bool"))
 188     {
 189       f_print (fout, "bool_t ");
 190     }
 191   else if (streq (type, "string"))
 192     {
 193       f_print (fout, "char *");
 194     }
 195   else
 196     {
 197       f_print (fout, "%s ", follow ? fixtype (type) : type);
 198     }
 199 }
 200
 201 static int
 202 typedefed (const definition * def, const char *type)
 203 {
 204   if (def->def_kind != DEF_TYPEDEF || def->def.ty.old_prefix != NULL)
 205     {
 206       return 0;
 207     }
 208   else
 209     {
 210       return streq (def->def_name, type);
 211     }
 212 }
 213
 214 int
 215 isvectordef (const char *type, relation rel)
 216 {
 217   definition *def;
 218
 219   for (;;)
 220     {
 221       switch (rel)
 222         {
 223         case REL_VECTOR:
 224           return !streq (type, "string");
 225         case REL_ARRAY:
 226           return 0;
 227         case REL_POINTER:
 228           return 0;
 229         case REL_ALIAS:
 230           def = findval (defined, type, typedefed);
 231           if (def == NULL)
 232             {
 233               return 0;
 234             }
 235           type = def->def.ty.old_type;
 236           rel = def->def.ty.rel;
 237         }
 238     }
 239 }
 240
 241 char *
 242 locase (const char *str)
 243 {
 244   char c;
 245   static char buf[100];
 246   char *p = buf;
 247
 248   while ((c = *str++) != 0)
 249     {
 250       *p++ = (c >= 'A' && c <= 'Z') ? (c - 'A' + 'a') : c;
 251     }
 252   *p = 0;
 253   return buf;
 254 }
 255
 256 void
 257 pvname_svc (const char *pname, const char *vnum)
 258 {
 259   f_print (fout, "%s_%s_svc", locase (pname), vnum);
 260 }
 261
 262 void
 263 pvname (const char *pname, const char *vnum)
 264 {
 265   f_print (fout, "%s_%s", locase (pname), vnum);
 266 }
 267
 268 /*
 269  * print a useful (?) error message, and then die
 270  */
 271 void
 272 error (const char *msg)
 273 {
 274   printwhere ();
 275   f_print (stderr, "%s, line %d: ", infilename, linenum);
 276   f_print (stderr, "%s\n", msg);
 277   crash ();
 278 }
 279
 280 /*
 281  * Something went wrong, unlink any files that we may have created and then
 282  * die.
 283  */
 284 void
 285 crash (void)
 286 {
 287   int i;
 288
 289   for (i = 0; i < nfiles; i++)
 290     {
 291       unlink (outfiles[i]);
 292     }
 293   exit (1);
 294 }
 295
 296 void
 297 record_open (const char *file)
 298 {
 299   if (nfiles < NFILES)
 300     {
 301       outfiles[nfiles++] = file;
 302     }
 303   else
 304     {
 305       f_print (stderr, "too many files!\n");
 306       crash ();
 307     }
 308 }
 309
 310 static char expectbuf[100];
 311
 312 /*
 313  * error, token encountered was not the expected one
 314  */
 315 void
 316 expected1 (tok_kind exp1)
 317 {
 318   s_print (expectbuf, "expected '%s'",
 319            toktostr (exp1));
 320   error (expectbuf);
 321 }
 322
 323 /*
 324  * error, token encountered was not one of two expected ones
 325  */
 326 void
 327 expected2 (tok_kind exp1, tok_kind exp2)
 328 {
 329   s_print (expectbuf, "expected '%s' or '%s'",
 330            toktostr (exp1),
 331            toktostr (exp2));
 332   error (expectbuf);
 333 }
 334
 335 /*
 336  * error, token encountered was not one of 3 expected ones
 337  */
 338 void
 339 expected3 (tok_kind exp1, tok_kind exp2, tok_kind exp3)
 340 {
 341   s_print (expectbuf, "expected '%s', '%s' or '%s'",
 342            toktostr (exp1),
 343            toktostr (exp2),
 344            toktostr (exp3));
 345   error (expectbuf);
 346 }
 347
 348 void
 349 tabify (FILE * f, int tab)
 350 {
 351   while (tab--)
 352     {
 353       (void) fputc ('\t', f);
 354     }
 355 }
 356
 357
 358 static const token tokstrings[] =
 359 {
 360   {TOK_IDENT, "identifier"},
 361   {TOK_CONST, "const"},
 362   {TOK_RPAREN, ")"},
 363   {TOK_LPAREN, "("},
 364   {TOK_RBRACE, "}"},
 365   {TOK_LBRACE, "{"},
 366   {TOK_LBRACKET, "["},
 367   {TOK_RBRACKET, "]"},
 368   {TOK_STAR, "*"},
 369   {TOK_COMMA, ","},
 370   {TOK_EQUAL, "="},
 371   {TOK_COLON, ":"},
 372   {TOK_SEMICOLON, ";"},
 373   {TOK_UNION, "union"},
 374   {TOK_STRUCT, "struct"},
 375   {TOK_SWITCH, "switch"},
 376   {TOK_CASE, "case"},
 377   {TOK_DEFAULT, "default"},
 378   {TOK_ENUM, "enum"},
 379   {TOK_TYPEDEF, "typedef"},
 380   {TOK_INT, "int"},
 381   {TOK_SHORT, "short"},
 382   {TOK_LONG, "long"},
 383   {TOK_UNSIGNED, "unsigned"},
 384   {TOK_DOUBLE, "double"},
 385   {TOK_FLOAT, "float"},
 386   {TOK_CHAR, "char"},
 387   {TOK_STRING, "string"},
 388   {TOK_OPAQUE, "opaque"},
 389   {TOK_BOOL, "bool"},
 390   {TOK_VOID, "void"},
 391   {TOK_PROGRAM, "program"},
 392   {TOK_VERSION, "version"},
 393   {TOK_EOF, "??????"}
 394 };
 395
 396 static const char *
 397 toktostr (tok_kind kind)
 398 {
 399   const token *sp;
 400
 401   for (sp = tokstrings; sp->kind != TOK_EOF && sp->kind != kind; sp++);
 402   return sp->str;
 403 }
 404
 405 static void
 406 printbuf (void)
 407 {
 408   char c;
 409   int i;
 410   int cnt;
 411
 412 #define TABSIZE 4
 413
 414   for (i = 0; (c = curline[i]) != 0; i++)
 415     {
 416       if (c == '\t')
 417         {
 418           cnt = 8 - (i % TABSIZE);
 419           c = ' ';
 420         }
 421       else
 422         {
 423           cnt = 1;
 424         }
 425       while (cnt--)
 426         {
 427           (void) fputc (c, stderr);
 428         }
 429     }
 430 }
 431
 432 static void
 433 printwhere (void)
 434 {
 435   int i;
 436   char c;
 437   int cnt;
 438
 439   printbuf ();
 440   for (i = 0; i < where - curline; i++)
 441     {
 442       c = curline[i];
 443       if (c == '\t')
 444         {
 445           cnt = 8 - (i % TABSIZE);
 446         }
 447       else
 448         {
 449           cnt = 1;
 450         }
 451       while (cnt--)
 452         {
 453           (void) fputc ('^', stderr);
 454         }
 455     }
 456   (void) fputc ('\n', stderr);
 457 }
 458
 459 char *
 460 make_argname (const char *pname, const char *vname)
 461 {
 462   char *name;
 463
 464   name = malloc (strlen (pname) + strlen (vname) + strlen (ARGEXT) + 3);
 465   if (!name)
 466     {
 467       fprintf (stderr, "failed in malloc");
 468       exit (1);
 469     }
 470   sprintf (name, "%s_%s_%s", locase (pname), vname, ARGEXT);
 471   return name;
 472 }
 473
 474 bas_type *typ_list_h;
 475 bas_type *typ_list_t;
 476
 477 void
 478 add_type (int len, const char *type)
 479 {
 480   bas_type *ptr;
 481
 482
 483   if ((ptr = malloc (sizeof (bas_type))) == NULL)
 484     {
 485       fprintf (stderr, "failed in malloc");
 486       exit (1);
 487     }
 488
 489   ptr->name = type;
 490   ptr->length = len;
 491   ptr->next = NULL;
 492   if (typ_list_t == NULL)
 493     {
 494
 495       typ_list_t = ptr;
 496       typ_list_h = ptr;
 497     }
 498   else
 499     {
 500
 501       typ_list_t->next = ptr;
 502       typ_list_t = ptr;
 503     }
 504
 505 }
 506
 507
 508 bas_type *
 509 find_type (const char *type)
 510 {
 511   bas_type *ptr;
 512
 513   ptr = typ_list_h;
 514
 515
 516   while (ptr != NULL)
 517     {
 518       if (strcmp (ptr->name, type) == 0)
 519         return ptr;
 520       else
 521         ptr = ptr->next;
 522     };
 523   return NULL;
 524 }