usr.bin/rpcgen/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.
   8  *
   9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  12  *
  13  * Sun RPC is provided with no support and without any obligation on the
  14  * part of Sun Microsystems, Inc. to assist in its use, correction,
  15  * modification or enhancement.
  16  *
  17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  19  * OR ANY PART THEREOF.
  20  *
  21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  22  * or profits or other special, indirect and consequential damages, even if
  23  * Sun has been advised of the possibility of such damages.
  24  *
  25  * Sun Microsystems, Inc.
  26  * 2550 Garcia Avenue
  27  * Mountain View, California  94043
  28  *
  29  * @(#)rpc_util.c 1.11 89/02/22 (C) 1987 SMI
  30  * $FreeBSD: src/usr.bin/rpcgen/rpc_util.c,v 1.6 1999/08/28 01:05:17 peter Exp $
  31  * $DragonFly: src/usr.bin/rpcgen/rpc_util.c,v 1.4 2004/06/19 16:40:36 joerg Exp $
  32  */
  33
  34 #ident  "@(#)rpc_util.c 1.14    93/07/05 SMI"
  35
  36 /*
  37  * rpc_util.c, Utility routines for the RPC protocol compiler
  38  * Copyright (C) 1989, Sun Microsystems, Inc.
  39  */
  40 #include <err.h>
  41 #include <ctype.h>
  42 #include <stdio.h>
  43 #include <string.h>
  44 #include <unistd.h>
  45 #include "rpc_scan.h"
  46 #include "rpc_parse.h"
  47 #include "rpc_util.h"
  48
  49 #define ARGEXT "argument"
  50
  51 char curline[MAXLINESIZE];      /* current read line */
  52 char *where = curline;          /* current point in line */
  53 int linenum = 0;                /* current line number */
  54
  55 char *infilename;               /* input filename */
  56
  57 #define NFILES   7
  58 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 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(char *a, 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, char *val, int (*cmp) (definition *, char *))
  94 {
  95         for (; lst != NULL; lst = lst->next) {
  96                 if ((*cmp) (lst->val, val))
  97                         return(lst->val);
  98         }
  99         return(NULL);
 100 }
 101
 102 /*
 103  * store a value in a list
 104  */
 105 void
 106 storeval(list **lstp, definition *val)
 107 {
 108         list **l;
 109         list *lst;
 110
 111         for (l = lstp; *l != NULL; l = (list **) & (*l)->next)
 112                 ;
 113         lst = ALLOC(list);
 114         lst->val = val;
 115         lst->next = NULL;
 116         *l = lst;
 117 }
 118
 119 static int
 120 findit(definition *def, char *type)
 121 {
 122         return(streq(def->def_name, type));
 123 }
 124
 125 static char *
 126 fixit(char *type, char *orig)
 127 {
 128         definition *def;
 129
 130         def = (definition *) FINDVAL(defined, type, findit);
 131         if (def == NULL || def->def_kind != DEF_TYPEDEF)
 132                 return(orig);
 133         switch (def->def.ty.rel) {
 134         case REL_VECTOR:
 135                 if (streq(def->def.ty.old_type, "opaque"))
 136                         return("char");
 137                 else
 138                         return(def->def.ty.old_type);
 139
 140         case REL_ALIAS:
 141                 return(fixit(def->def.ty.old_type, orig));
 142         default:
 143                 return(orig);
 144         }
 145 }
 146
 147 char *
 148 fixtype(char *type)
 149 {
 150         return(fixit(type, type));
 151 }
 152
 153 char *
 154 stringfix(char *type)
 155 {
 156         if (streq(type, "string"))
 157                 return("wrapstring");
 158         else
 159                 return(type);
 160 }
 161
 162 void
 163 ptype(char *prefix, char *type, int follow)
 164 {
 165         if (prefix != NULL) {
 166                 if (streq(prefix, "enum"))
 167                         f_print(fout, "enum ");
 168                 else
 169                         f_print(fout, "struct ");
 170         }
 171         if (streq(type, "bool"))
 172                 f_print(fout, "bool_t ");
 173         else if (streq(type, "string"))
 174                 f_print(fout, "char *");
 175         else
 176                 f_print(fout, "%s ", follow ? fixtype(type) : type);
 177 }
 178
 179 static int
 180 typedefed(definition *def, char *type)
 181 {
 182         if (def->def_kind != DEF_TYPEDEF || def->def.ty.old_prefix != NULL)
 183                 return(0);
 184         else
 185                 return(streq(def->def_name, type));
 186 }
 187
 188 int
 189 isvectordef(char *type, relation rel)
 190 {
 191         definition *def;
 192
 193         for (;;) {
 194                 switch (rel) {
 195                 case REL_VECTOR:
 196                         return(!streq(type, "string"));
 197                 case REL_ARRAY:
 198                         return(0);
 199                 case REL_POINTER:
 200                         return(0);
 201                 case REL_ALIAS:
 202                         def = (definition *) FINDVAL(defined, type, typedefed);
 203                         if (def == NULL) {
 204                                 return(0);
 205                         }
 206                         type = def->def.ty.old_type;
 207                         rel = def->def.ty.rel;
 208                 }
 209         }
 210
 211         return(0);
 212 }
 213
 214 char *
 215 locase(char *str)
 216 {
 217         char c;
 218         static char buf[100];
 219         char *p = buf;
 220
 221         while ((c = *str++) != 0)
 222                 *p++ = (c >= 'A' && c <= 'Z') ? (c - 'A' + 'a') : c;
 223         *p = 0;
 224         return(buf);
 225 }
 226
 227 void
 228 pvname_svc(char *pname, char *vnum)
 229 {
 230         f_print(fout, "%s_%s_svc", locase(pname), vnum);
 231 }
 232
 233 void
 234 pvname(char *pname, char *vnum)
 235 {
 236         f_print(fout, "%s_%s", locase(pname), vnum);
 237 }
 238
 239 /*
 240  * print a useful (?) error message, and then die
 241  */
 242 void
 243 error(char *msg)
 244 {
 245         printwhere();
 246         warnx("%s, line %d: %s", infilename, linenum, msg);
 247         crash();
 248 }
 249
 250 /*
 251  * Something went wrong, unlink any files that we may have created and then
 252  * die.
 253  */
 254 void
 255 crash(void)
 256 {
 257         int i;
 258
 259         for (i = 0; i < nfiles; i++)
 260                 unlink(outfiles[i]);
 261         exit(1);
 262 }
 263
 264 void
 265 record_open(char *file)
 266 {
 267         if (nfiles < NFILES) {
 268                 outfiles[nfiles++] = file;
 269         } else {
 270                 warnx("too many files");
 271                 crash();
 272         }
 273 }
 274
 275 static char expectbuf[100];
 276 static char *toktostr();
 277
 278 /*
 279  * error, token encountered was not the expected one
 280  */
 281 void
 282 expected1(tok_kind exp1)
 283 {
 284         s_print(expectbuf, "expected '%s'", toktostr(exp1));
 285         error(expectbuf);
 286 }
 287
 288 /*
 289  * error, token encountered was not one of two expected ones
 290  */
 291 void
 292 expected2(tok_kind exp1, tok_kind exp2)
 293 {
 294         s_print(expectbuf, "expected '%s' or '%s'", toktostr(exp1),
 295                 toktostr(exp2));
 296         error(expectbuf);
 297 }
 298
 299 /*
 300  * error, token encountered was not one of 3 expected ones
 301  */
 302 void
 303 expected3(tok_kind exp1, tok_kind exp2, tok_kind exp3)
 304 {
 305         s_print(expectbuf, "expected '%s', '%s' or '%s'", toktostr(exp1),
 306                 toktostr(exp2), toktostr(exp3));
 307         error(expectbuf);
 308 }
 309
 310 void
 311 tabify(FILE *f, int tab)
 312 {
 313         while (tab--)
 314                 fputc('\t', f);
 315 }
 316
 317
 318 static token tokstrings[] = {
 319                         {TOK_IDENT, "identifier"},
 320                         {TOK_CONST, "const"},
 321                         {TOK_RPAREN, ")"},
 322                         {TOK_LPAREN, "("},
 323                         {TOK_RBRACE, "}"},
 324                         {TOK_LBRACE, "{"},
 325                         {TOK_LBRACKET, "["},
 326                         {TOK_RBRACKET, "]"},
 327                         {TOK_STAR, "*"},
 328                         {TOK_COMMA, ","},
 329                         {TOK_EQUAL, "="},
 330                         {TOK_COLON, ":"},
 331                         {TOK_SEMICOLON, ";"},
 332                         {TOK_UNION, "union"},
 333                         {TOK_STRUCT, "struct"},
 334                         {TOK_SWITCH, "switch"},
 335                         {TOK_CASE, "case"},
 336                         {TOK_DEFAULT, "default"},
 337                         {TOK_ENUM, "enum"},
 338                         {TOK_TYPEDEF, "typedef"},
 339                         {TOK_INT, "int"},
 340                         {TOK_SHORT, "short"},
 341                         {TOK_LONG, "long"},
 342                         {TOK_UNSIGNED, "unsigned"},
 343                         {TOK_DOUBLE, "double"},
 344                         {TOK_FLOAT, "float"},
 345                         {TOK_CHAR, "char"},
 346                         {TOK_STRING, "string"},
 347                         {TOK_OPAQUE, "opaque"},
 348                         {TOK_BOOL, "bool"},
 349                         {TOK_VOID, "void"},
 350                         {TOK_PROGRAM, "program"},
 351                         {TOK_VERSION, "version"},
 352                         {TOK_EOF, "??????"}
 353 };
 354
 355 static char *
 356 toktostr(tok_kind kind)
 357 {
 358         token *sp;
 359
 360         for (sp = tokstrings; sp->kind != TOK_EOF && sp->kind != kind; sp++)
 361                 ;
 362         return(sp->str);
 363 }
 364
 365 static void
 366 printbuf(void)
 367 {
 368         char c;
 369         int i;
 370         int cnt;
 371
 372 #       define TABSIZE 4
 373
 374         for (i = 0; (c = curline[i]); i++) {
 375                 if (c == '\t') {
 376                         cnt = 8 - (i % TABSIZE);
 377                         c = ' ';
 378                 } else {
 379                         cnt = 1;
 380                 }
 381                 while (cnt--)
 382                         fputc(c, stderr);
 383         }
 384 }
 385
 386 static void
 387 printwhere(void)
 388 {
 389         int i;
 390         char c;
 391         int cnt;
 392
 393         printbuf();
 394         for (i = 0; i < where - curline; i++) {
 395                 c = curline[i];
 396                 if (c == '\t')
 397                         cnt = 8 - (i % TABSIZE);
 398                 else
 399                         cnt = 1;
 400                 while (cnt--) {
 401                         fputc('^', stderr);
 402                 }
 403         }
 404         fputc('\n', stderr);
 405 }
 406
 407 char *
 408 make_argname(char *pname, char *vname)
 409 {
 410         char *name;
 411
 412         name = malloc(strlen(pname) + strlen(vname) + strlen(ARGEXT) + 3);
 413         if (!name)
 414                 errx(1, "failed in malloc");
 415         sprintf(name, "%s_%s_%s", locase(pname), vname, ARGEXT);
 416         return(name);
 417 }
 418
 419 bas_type *typ_list_h;
 420 bas_type *typ_list_t;
 421
 422 void
 423 add_type(int len, char *type)
 424 {
 425         bas_type *ptr;
 426
 427         if ((ptr = (bas_type *) malloc(sizeof (bas_type))) == NULL)
 428                 errx(1, "failed in malloc");
 429
 430         ptr->name = type;
 431         ptr->length = len;
 432         ptr->next = NULL;
 433         if (typ_list_t == NULL) {
 434                 typ_list_t = ptr;
 435                 typ_list_h = ptr;
 436         } else {
 437                 typ_list_t->next = ptr;
 438                 typ_list_t = ptr;
 439         }
 440 }
 441
 442
 443 bas_type *
 444 find_type(char *type)
 445 {
 446         bas_type * ptr;
 447
 448         ptr = typ_list_h;
 449         while (ptr != NULL)
 450         {
 451                 if (strcmp(ptr->name, type) == 0)
 452                         return(ptr);
 453                 else
 454                         ptr = ptr->next;
 455         }
 456         return(NULL);
 457 }