sunrpc/rpc_util.c

   1 /*
   2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   3  * unrestricted use provided that this legend is included on all tape
   4  * media and as a part of the software program in whole or part.  Users
   5  * may copy or modify Sun RPC without charge, but are not authorized
   6  * to license or distribute it to anyone else except as part of a product or
   7  * program developed by the user or with the express written consent of
   8  * Sun Microsystems, Inc.
   9  *
  10  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  11  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  12  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  13  *
  14  * Sun RPC is provided with no support and without any obligation on the
  15  * part of Sun Microsystems, Inc. to assist in its use, correction,
  16  * modification or enhancement.
  17  *
  18  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  19  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  20  * OR ANY PART THEREOF.
  21  *
  22  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  23  * or profits or other special, indirect and consequential damages, even if
  24  * Sun has been advised of the possibility of such damages.
  25  *
  26  * Sun Microsystems, Inc.
  27  * 2550 Garcia Avenue
  28  * Mountain View, California  94043
  29  */
  30
  31 /*
  32  * From: @(#)rpc_util.c 1.11 89/02/22 (C) 1987 SMI
  33  */
  34 char util_rcsid[] =
  35   "$Id$";
  36
  37 /*
  38  * rpc_util.c, Utility routines for the RPC protocol compiler
  39  */
  40 #include <stdio.h>
  41 #include <ctype.h>
  42 #include <string.h>
  43 #include <unistd.h>
  44 #include "rpc_scan.h"
  45 #include "rpc_parse.h"
  46 #include "rpc_util.h"
  47 #include "proto.h"
  48
  49 #define ARGEXT "argument"
  50
  51 char curline[MAXLINESIZE];      /* current read line */
  52 const char *where = curline;    /* current point in line */
  53 int linenum = 0;                /* current line number */
  54
  55 const char *infilename;         /* input filename */
  56
  57 #define NFILES 7
  58 const char *outfiles[NFILES];   /* output file names */
  59 int nfiles;
  60
  61 FILE *fout;                     /* file pointer of current output */
  62 FILE *fin;                      /* file pointer of current input */
  63
  64 list *defined;                  /* list of defined things */
  65
  66 static int findit (const definition * def, const char *type);
  67 static const char *fixit (const char *type, const char *orig);
  68 static int typedefed (const definition * def, const char *type);
  69 static const char *toktostr (tok_kind kind);
  70 static void printbuf (void);
  71 static void printwhere (void);
  72
  73 /*
  74  * Reinitialize the world
  75  */
  76 void
  77 reinitialize (void)
  78 {
  79   memset (curline, 0, MAXLINESIZE);
  80   where = curline;
  81   linenum = 0;
  82   defined = NULL;
  83 }
  84
  85 /*
  86  * string equality
  87  */
  88 int
  89 streq (const char *a, const char *b)
  90 {
  91   return strcmp (a, b) == 0;
  92 }
  93
  94 /*
  95  * find a value in a list
  96  */
  97 definition *
  98 findval (list * lst, const char *val,
  99          int (*cmp) (const definition *, const char *))
 100 {
 101
 102   for (; lst != NULL; lst = lst->next)
 103     {
 104       if (cmp (lst->val, val))
 105         {
 106           return lst->val;
 107         }
 108     }
 109   return NULL;
 110 }
 111
 112 /*
 113  * store a value in a list
 114  */
 115 void
 116 storeval (list ** lstp, definition * val)
 117 {
 118   list **l;
 119   list *lst;
 120
 121
 122   for (l = lstp; *l != NULL; l = (list **) & (*l)->next);
 123   lst = ALLOC (list);
 124   lst->val = val;
 125   lst->next = NULL;
 126   *l = lst;
 127 }
 128
 129 static int
 130 findit (const definition * def, const char *type)
 131 {
 132   return streq (def->def_name, type);
 133 }
 134
 135 static const char *
 136 fixit (const char *type, const char *orig)
 137 {
 138   definition *def;
 139
 140   def = findval (defined, type, findit);
 141   if (def == NULL || def->def_kind != DEF_TYPEDEF)
 142     {
 143       return orig;
 144     }
 145   switch (def->def.ty.rel)
 146     {
 147     case REL_VECTOR:
 148       return (def->def.ty.old_type);
 149     case REL_ALIAS:
 150       return (fixit (def->def.ty.old_type, orig));
 151     default:
 152       return orig;
 153     }
 154 }
 155
 156 const char *
 157 fixtype (const char *type)
 158 {
 159   return fixit (type, type);
 160 }
 161
 162 const char *
 163 stringfix (const char *type)
 164 {
 165   if (streq (type, "string"))
 166     {
 167       return "wrapstring";
 168     }
 169   else
 170     {
 171       return type;
 172     }
 173 }
 174
 175 void
 176 ptype (const char *prefix, const char *type, int follow)
 177 {
 178   if (prefix != NULL)
 179     {
 180       if (streq (prefix, "enum"))
 181         {
 182           f_print (fout, "enum ");
 183         }
 184       else
 185         {
 186           f_print (fout, "struct ");
 187         }
 188     }
 189   if (streq (type, "bool"))
 190     {
 191       f_print (fout, "bool_t ");
 192     }
 193   else if (streq (type, "string"))
 194     {
 195       f_print (fout, "char *");
 196     }
 197   else
 198     {
 199       f_print (fout, "%s ", follow ? fixtype (type) : type);
 200     }
 201 }
 202
 203 static int
 204 typedefed (const definition * def, const char *type)
 205 {
 206   if (def->def_kind != DEF_TYPEDEF || def->def.ty.old_prefix != NULL)
 207     {
 208       return 0;
 209     }
 210   else
 211     {
 212       return streq (def->def_name, type);
 213     }
 214 }
 215
 216 int
 217 isvectordef (const char *type, relation rel)
 218 {
 219   definition *def;
 220
 221   for (;;)
 222     {
 223       switch (rel)
 224         {
 225         case REL_VECTOR:
 226           return !streq (type, "string");
 227         case REL_ARRAY:
 228           return 0;
 229         case REL_POINTER:
 230           return (0);
 231         case REL_ALIAS:
 232           def = findval (defined, type, typedefed);
 233           if (def == NULL)
 234             {
 235               return 0;
 236             }
 237           type = def->def.ty.old_type;
 238           rel = def->def.ty.rel;
 239         }
 240     }
 241 }
 242
 243 char *
 244 locase (const char *str)
 245 {
 246   char c;
 247   static char buf[100];
 248   char *p = buf;
 249
 250   while ((c = *str++) != 0)
 251     {
 252       *p++ = (c >= 'A' && c <= 'Z') ? (c - 'A' + 'a') : c;
 253     }
 254   *p = 0;
 255   return buf;
 256 }
 257
 258 void
 259 pvname_svc (const char *pname, const char *vnum)
 260 {
 261   f_print (fout, "%s_%s_svc", locase (pname), vnum);
 262 }
 263
 264 void
 265 pvname (const char *pname, const char *vnum)
 266 {
 267   f_print (fout, "%s_%s", locase (pname), vnum);
 268 }
 269
 270 /*
 271  * print a useful (?) error message, and then die
 272  */
 273 void
 274 error (const char *msg)
 275 {
 276   printwhere ();
 277   f_print (stderr, "%s, line %d: ", infilename, linenum);
 278   f_print (stderr, "%s\n", msg);
 279   crash ();
 280 }
 281
 282 /*
 283  * Something went wrong, unlink any files that we may have created and then
 284  * die.
 285  */
 286 void
 287 crash (void)
 288 {
 289   int i;
 290
 291   for (i = 0; i < nfiles; i++)
 292     {
 293       (void) unlink (outfiles[i]);
 294     }
 295   exit (1);
 296 }
 297
 298 void
 299 record_open (const char *file)
 300 {
 301   if (nfiles < NFILES)
 302     {
 303       outfiles[nfiles++] = file;
 304     }
 305   else
 306     {
 307       f_print (stderr, "too many files!\n");
 308       crash ();
 309     }
 310 }
 311
 312 static char expectbuf[100];
 313
 314 /*
 315  * error, token encountered was not the expected one
 316  */
 317 void
 318 expected1 (tok_kind exp1)
 319 {
 320   s_print (expectbuf, "expected '%s'",
 321            toktostr (exp1));
 322   error (expectbuf);
 323 }
 324
 325 /*
 326  * error, token encountered was not one of two expected ones
 327  */
 328 void
 329 expected2 (tok_kind exp1, tok_kind exp2)
 330 {
 331   s_print (expectbuf, "expected '%s' or '%s'",
 332            toktostr (exp1),
 333            toktostr (exp2));
 334   error (expectbuf);
 335 }
 336
 337 /*
 338  * error, token encountered was not one of 3 expected ones
 339  */
 340 void
 341 expected3 (tok_kind exp1, tok_kind exp2, tok_kind exp3)
 342 {
 343   s_print (expectbuf, "expected '%s', '%s' or '%s'",
 344            toktostr (exp1),
 345            toktostr (exp2),
 346            toktostr (exp3));
 347   error (expectbuf);
 348 }
 349
 350 void
 351 tabify (FILE * f, int tab)
 352 {
 353   while (tab--)
 354     {
 355       (void) fputc ('\t', f);
 356     }
 357 }
 358
 359
 360 static const token tokstrings[] =
 361 {
 362   {TOK_IDENT, "identifier"},
 363   {TOK_CONST, "const"},
 364   {TOK_RPAREN, ")"},
 365   {TOK_LPAREN, "("},
 366   {TOK_RBRACE, "}"},
 367   {TOK_LBRACE, "{"},
 368   {TOK_LBRACKET, "["},
 369   {TOK_RBRACKET, "]"},
 370   {TOK_STAR, "*"},
 371   {TOK_COMMA, ","},
 372   {TOK_EQUAL, "="},
 373   {TOK_COLON, ":"},
 374   {TOK_SEMICOLON, ";"},
 375   {TOK_UNION, "union"},
 376   {TOK_STRUCT, "struct"},
 377   {TOK_SWITCH, "switch"},
 378   {TOK_CASE, "case"},
 379   {TOK_DEFAULT, "default"},
 380   {TOK_ENUM, "enum"},
 381   {TOK_TYPEDEF, "typedef"},
 382   {TOK_INT, "int"},
 383   {TOK_SHORT, "short"},
 384   {TOK_LONG, "long"},
 385   {TOK_UNSIGNED, "unsigned"},
 386   {TOK_DOUBLE, "double"},
 387   {TOK_FLOAT, "float"},
 388   {TOK_CHAR, "char"},
 389   {TOK_STRING, "string"},
 390   {TOK_OPAQUE, "opaque"},
 391   {TOK_BOOL, "bool"},
 392   {TOK_VOID, "void"},
 393   {TOK_PROGRAM, "program"},
 394   {TOK_VERSION, "version"},
 395   {TOK_EOF, "??????"}
 396 };
 397
 398 static const char *
 399 toktostr (tok_kind kind)
 400 {
 401   token *sp;
 402
 403   for (sp = tokstrings; sp->kind != TOK_EOF && sp->kind != kind; sp++);
 404   return (sp->str);
 405 }
 406
 407 static void
 408 printbuf (void)
 409 {
 410   char c;
 411   int i;
 412   int cnt;
 413
 414 #define TABSIZE 4
 415
 416   for (i = 0; (c = curline[i]) != 0; i++)
 417     {
 418       if (c == '\t')
 419         {
 420           cnt = 8 - (i % TABSIZE);
 421           c = ' ';
 422         }
 423       else
 424         {
 425           cnt = 1;
 426         }
 427       while (cnt--)
 428         {
 429           (void) fputc (c, stderr);
 430         }
 431     }
 432 }
 433
 434 static void
 435 printwhere (void)
 436 {
 437   int i;
 438   char c;
 439   int cnt;
 440
 441   printbuf ();
 442   for (i = 0; i < where - curline; i++)
 443     {
 444       c = curline[i];
 445       if (c == '\t')
 446         {
 447           cnt = 8 - (i % TABSIZE);
 448         }
 449       else
 450         {
 451           cnt = 1;
 452         }
 453       while (cnt--)
 454         {
 455           (void) fputc ('^', stderr);
 456         }
 457     }
 458   (void) fputc ('\n', stderr);
 459 }
 460
 461 char *
 462 make_argname (const char *pname, const char *vname)
 463 {
 464   char *name;
 465
 466   name = malloc (strlen (pname) + strlen (vname) + strlen (ARGEXT) + 3);
 467   if (!name)
 468     {
 469       fprintf (stderr, "failed in malloc");
 470       exit (1);
 471     }
 472   sprintf (name, "%s_%s_%s", locase (pname), vname, ARGEXT);
 473   return name;
 474 }
 475
 476 bas_type *typ_list_h;
 477 bas_type *typ_list_t;
 478
 479 void
 480 add_type (int len, const char *type)
 481 {
 482   bas_type *ptr;
 483
 484
 485   if ((ptr = malloc (sizeof (bas_type))) == NULL)
 486     {
 487       fprintf (stderr, "failed in malloc");
 488       exit (1);
 489     }
 490
 491   ptr->name = type;
 492   ptr->length = len;
 493   ptr->next = NULL;
 494   if (typ_list_t == NULL)
 495     {
 496
 497       typ_list_t = ptr;
 498       typ_list_h = ptr;
 499     }
 500   else
 501     {
 502
 503       typ_list_t->next = ptr;
 504       typ_list_t = ptr;
 505     }
 506
 507 }
 508
 509
 510 bas_type *
 511 find_type (const char *type)
 512 {
 513   bas_type *ptr;
 514
 515   ptr = typ_list_h;
 516
 517
 518   while (ptr != NULL)
 519     {
 520       if (strcmp (ptr->name, type) == 0)
 521         return ptr;
 522       else
 523         ptr = ptr->next;
 524     };
 525   return NULL;
 526 }