1 /* $NetBSD: rpc_parse.c,v 1.23 2022/01/11 22:45:56 andvar Exp $ */ 2 /* 3 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 4 * unrestricted use provided that this legend is included on all tape 5 * media and as a part of the software program in whole or part. Users 6 * may copy or modify Sun RPC without charge, but are not authorized 7 * to license or distribute it to anyone else except as part of a product or 8 * program developed by the user or with the express written consent of 9 * Sun Microsystems, Inc. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 32 #if HAVE_NBTOOL_CONFIG_H 33 #include "nbtool_config.h" 34 #endif 35 36 #include <sys/cdefs.h> 37 #if defined(__RCSID) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)rpc_parse.c 1.8 89/02/22 (C) 1987 SMI"; 40 #else 41 __RCSID("$NetBSD: rpc_parse.c,v 1.23 2022/01/11 22:45:56 andvar Exp $"); 42 #endif 43 #endif 44 45 /* 46 * rpc_parse.c, Parser for the RPC protocol compiler 47 * Copyright (C) 1987 Sun Microsystems, Inc. 48 */ 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include "rpc/types.h" 53 #include "rpc_scan.h" 54 #include "rpc_parse.h" 55 #include "rpc_util.h" 56 57 #define ARGNAME "arg" 58 59 static void isdefined(definition *); 60 static void def_struct(definition *); 61 static void def_program(definition *); 62 static void def_enum(definition *); 63 static void def_const(definition *); 64 static void def_union(definition *); 65 static void check_type_name(const char *, int); 66 static void def_typedef(definition *); 67 static void get_declaration(declaration *, defkind); 68 static void get_prog_declaration(declaration *, defkind, int); 69 static void get_type(const char **, const char **, defkind); 70 static void unsigned_dec(const char **); 71 72 /* 73 * return the next definition you see 74 */ 75 definition * 76 get_definition(void) 77 { 78 definition *defp; 79 token tok; 80 81 defp = ALLOC(definition); 82 get_token(&tok); 83 switch (tok.kind) { 84 case TOK_STRUCT: 85 def_struct(defp); 86 break; 87 case TOK_UNION: 88 def_union(defp); 89 break; 90 case TOK_TYPEDEF: 91 def_typedef(defp); 92 break; 93 case TOK_ENUM: 94 def_enum(defp); 95 break; 96 case TOK_PROGRAM: 97 def_program(defp); 98 break; 99 case TOK_CONST: 100 def_const(defp); 101 break; 102 case TOK_EOF: 103 free(defp); 104 return (NULL); 105 default: 106 error("Expected definition keyword"); 107 } 108 scan(TOK_SEMICOLON, &tok); 109 isdefined(defp); 110 return (defp); 111 } 112 113 static void 114 isdefined(definition *defp) 115 { 116 STOREVAL(&defined, defp); 117 } 118 119 static void 120 def_struct(definition *defp) 121 { 122 token tok; 123 declaration dec; 124 decl_list *decls; 125 decl_list **tailp; 126 127 defp->def_kind = DEF_STRUCT; 128 129 scan(TOK_IDENT, &tok); 130 defp->def_name = tok.str; 131 scan(TOK_LBRACE, &tok); 132 tailp = &defp->def.st.decls; 133 do { 134 get_declaration(&dec, DEF_STRUCT); 135 decls = ALLOC(decl_list); 136 decls->decl = dec; 137 *tailp = decls; 138 tailp = &decls->next; 139 scan(TOK_SEMICOLON, &tok); 140 peek(&tok); 141 } while (tok.kind != TOK_RBRACE); 142 get_token(&tok); 143 *tailp = NULL; 144 } 145 146 static void 147 def_program(definition *defp) 148 { 149 token tok; 150 declaration dec; 151 decl_list *decls; 152 decl_list **tailp; 153 version_list *vlist; 154 version_list **vtailp; 155 proc_list *plist; 156 proc_list **ptailp; 157 int num_args; 158 bool_t isvoid = FALSE; /* whether first argument is void */ 159 defp->def_kind = DEF_PROGRAM; 160 scan(TOK_IDENT, &tok); 161 defp->def_name = tok.str; 162 scan(TOK_LBRACE, &tok); 163 vtailp = &defp->def.pr.versions; 164 tailp = &defp->def.st.decls; 165 scan(TOK_VERSION, &tok); 166 do { 167 scan(TOK_IDENT, &tok); 168 vlist = ALLOC(version_list); 169 vlist->vers_name = tok.str; 170 scan(TOK_LBRACE, &tok); 171 ptailp = &vlist->procs; 172 do { 173 /* get result type */ 174 plist = ALLOC(proc_list); 175 get_type(&plist->res_prefix, &plist->res_type, 176 DEF_PROGRAM); 177 if (streq(plist->res_type, "opaque")) { 178 error("Illegal result type"); 179 } 180 scan(TOK_IDENT, &tok); 181 plist->proc_name = tok.str; 182 scan(TOK_LPAREN, &tok); 183 /* get args - first one */ 184 num_args = 1; 185 isvoid = FALSE; 186 /* type of DEF_PROGRAM in the first 187 * get_prog_declaration and DEF_STRUCT in the next 188 * allows void as argument if it is the only argument */ 189 get_prog_declaration(&dec, DEF_PROGRAM, num_args); 190 if (streq(dec.type, "void")) 191 isvoid = TRUE; 192 decls = ALLOC(decl_list); 193 plist->args.decls = decls; 194 decls->decl = dec; 195 tailp = &decls->next; 196 /* get args */ 197 while (peekscan(TOK_COMMA, &tok)) { 198 num_args++; 199 get_prog_declaration(&dec, DEF_STRUCT, 200 num_args); 201 decls = ALLOC(decl_list); 202 decls->decl = dec; 203 *tailp = decls; 204 if (streq(dec.type, "void")) 205 isvoid = TRUE; 206 tailp = &decls->next; 207 } 208 /* multiple arguments are only allowed in newstyle */ 209 if (!newstyle && num_args > 1) { 210 error("Only one argument is allowed"); 211 } 212 if (isvoid && num_args > 1) { 213 error("Illegal use of void in program definition"); 214 } 215 *tailp = NULL; 216 scan(TOK_RPAREN, &tok); 217 scan(TOK_EQUAL, &tok); 218 scan_num(&tok); 219 scan(TOK_SEMICOLON, &tok); 220 plist->proc_num = tok.str; 221 plist->arg_num = num_args; 222 *ptailp = plist; 223 ptailp = &plist->next; 224 peek(&tok); 225 } while (tok.kind != TOK_RBRACE); 226 *ptailp = NULL; 227 *vtailp = vlist; 228 vtailp = &vlist->next; 229 scan(TOK_RBRACE, &tok); 230 scan(TOK_EQUAL, &tok); 231 scan_num(&tok); 232 vlist->vers_num = tok.str; 233 /* make the argument structure name for each arg */ 234 for (plist = vlist->procs; plist != NULL; 235 plist = plist->next) { 236 plist->args.argname = make_argname(plist->proc_name, 237 vlist->vers_num); 238 /* free the memory ?? */ 239 } 240 scan(TOK_SEMICOLON, &tok); 241 scan2(TOK_VERSION, TOK_RBRACE, &tok); 242 } while (tok.kind == TOK_VERSION); 243 scan(TOK_EQUAL, &tok); 244 scan_num(&tok); 245 defp->def.pr.prog_num = tok.str; 246 *vtailp = NULL; 247 } 248 249 250 static void 251 def_enum(definition *defp) 252 { 253 token tok; 254 enumval_list *elist; 255 enumval_list **tailp; 256 257 defp->def_kind = DEF_ENUM; 258 scan(TOK_IDENT, &tok); 259 defp->def_name = tok.str; 260 scan(TOK_LBRACE, &tok); 261 tailp = &defp->def.en.vals; 262 do { 263 scan(TOK_IDENT, &tok); 264 elist = ALLOC(enumval_list); 265 elist->name = tok.str; 266 elist->assignment = NULL; 267 scan3(TOK_COMMA, TOK_RBRACE, TOK_EQUAL, &tok); 268 if (tok.kind == TOK_EQUAL) { 269 scan_num(&tok); 270 elist->assignment = tok.str; 271 scan2(TOK_COMMA, TOK_RBRACE, &tok); 272 } 273 *tailp = elist; 274 tailp = &elist->next; 275 } while (tok.kind != TOK_RBRACE); 276 *tailp = NULL; 277 } 278 279 static void 280 def_const(definition *defp) 281 { 282 token tok; 283 284 defp->def_kind = DEF_CONST; 285 scan(TOK_IDENT, &tok); 286 defp->def_name = tok.str; 287 scan(TOK_EQUAL, &tok); 288 scan2(TOK_IDENT, TOK_STRCONST, &tok); 289 defp->def.co = tok.str; 290 } 291 292 static void 293 def_union(definition *defp) 294 { 295 token tok; 296 declaration dec; 297 case_list *cases; 298 case_list **tailp; 299 300 defp->def_kind = DEF_UNION; 301 scan(TOK_IDENT, &tok); 302 defp->def_name = tok.str; 303 scan(TOK_SWITCH, &tok); 304 scan(TOK_LPAREN, &tok); 305 get_declaration(&dec, DEF_UNION); 306 defp->def.un.enum_decl = dec; 307 tailp = &defp->def.un.cases; 308 scan(TOK_RPAREN, &tok); 309 scan(TOK_LBRACE, &tok); 310 scan(TOK_CASE, &tok); 311 while (tok.kind == TOK_CASE) { 312 scan2(TOK_IDENT, TOK_CHARCONST, &tok); 313 cases = ALLOC(case_list); 314 cases->case_name = tok.str; 315 scan(TOK_COLON, &tok); 316 /* now peek at next token */ 317 if (peekscan(TOK_CASE, &tok)) { 318 319 do { 320 scan2(TOK_IDENT, TOK_CHARCONST, &tok); 321 cases->contflag = 1; /* continued case 322 * statement */ 323 *tailp = cases; 324 tailp = &cases->next; 325 cases = ALLOC(case_list); 326 cases->case_name = tok.str; 327 scan(TOK_COLON, &tok); 328 329 } while (peekscan(TOK_CASE, &tok)); 330 } 331 get_declaration(&dec, DEF_UNION); 332 cases->case_decl = dec; 333 cases->contflag = 0; /* no continued case statement */ 334 *tailp = cases; 335 tailp = &cases->next; 336 scan(TOK_SEMICOLON, &tok); 337 338 scan3(TOK_CASE, TOK_DEFAULT, TOK_RBRACE, &tok); 339 } 340 *tailp = NULL; 341 if (tok.kind == TOK_DEFAULT) { 342 scan(TOK_COLON, &tok); 343 get_declaration(&dec, DEF_UNION); 344 defp->def.un.default_decl = ALLOC(declaration); 345 *defp->def.un.default_decl = dec; 346 scan(TOK_SEMICOLON, &tok); 347 scan(TOK_RBRACE, &tok); 348 } else { 349 defp->def.un.default_decl = NULL; 350 } 351 } 352 353 static const char *const reserved_words[] = { 354 "array", 355 "bytes", 356 "destroy", 357 "free", 358 "getpos", 359 "inline", 360 "pointer", 361 "reference", 362 "setpos", 363 "sizeof", 364 "union", 365 "vector", 366 NULL 367 }; 368 369 static const char *const reserved_types[] = { 370 "opaque", 371 "string", 372 NULL 373 }; 374 /* check that the given name is not one that would eventually result in 375 xdr routines that would conflict with internal XDR routines. */ 376 static void 377 check_type_name(const char *name, int new_type) 378 { 379 int i; 380 381 for (i = 0; reserved_words[i] != NULL; i++) { 382 if (strcmp(name, reserved_words[i]) == 0) { 383 error("Illegal (reserved) name '%s' in type definition", name); 384 } 385 } 386 if (new_type) { 387 for (i = 0; reserved_types[i] != NULL; i++) { 388 if (strcmp(name, reserved_types[i]) == 0) { 389 error("Illegal (reserved) name '%s' in type definition", name); 390 } 391 } 392 } 393 } 394 395 static void 396 def_typedef(definition *defp) 397 { 398 declaration dec; 399 400 defp->def_kind = DEF_TYPEDEF; 401 get_declaration(&dec, DEF_TYPEDEF); 402 defp->def_name = dec.name; 403 check_type_name(dec.name, 1); 404 defp->def.ty.old_prefix = dec.prefix; 405 defp->def.ty.old_type = dec.type; 406 defp->def.ty.rel = dec.rel; 407 defp->def.ty.array_max = dec.array_max; 408 } 409 410 static void 411 get_declaration(declaration *dec, defkind dkind) 412 { 413 token tok; 414 415 get_type(&dec->prefix, &dec->type, dkind); 416 dec->rel = REL_ALIAS; 417 if (streq(dec->type, "void")) { 418 return; 419 } 420 check_type_name(dec->type, 0); 421 422 scan2(TOK_STAR, TOK_IDENT, &tok); 423 if (tok.kind == TOK_STAR) { 424 dec->rel = REL_POINTER; 425 scan(TOK_IDENT, &tok); 426 } 427 dec->name = tok.str; 428 if (peekscan(TOK_LBRACKET, &tok)) { 429 if (dec->rel == REL_POINTER) { 430 error("No array-of-pointer declarations -- use typedef"); 431 } 432 dec->rel = REL_VECTOR; 433 scan_num(&tok); 434 dec->array_max = tok.str; 435 scan(TOK_RBRACKET, &tok); 436 } else 437 if (peekscan(TOK_LANGLE, &tok)) { 438 if (dec->rel == REL_POINTER) { 439 error("No array-of-pointer declarations -- use typedef"); 440 } 441 dec->rel = REL_ARRAY; 442 if (peekscan(TOK_RANGLE, &tok)) { 443 dec->array_max = "(unsigned int)~0"; 444 /* unspecified size, use * max */ 445 } else { 446 scan_num(&tok); 447 dec->array_max = tok.str; 448 scan(TOK_RANGLE, &tok); 449 } 450 } 451 if (streq(dec->type, "opaque")) { 452 if (dec->rel != REL_ARRAY && dec->rel != REL_VECTOR) { 453 error("Array declaration expected"); 454 } 455 } else 456 if (streq(dec->type, "string")) { 457 if (dec->rel != REL_ARRAY) { 458 error("Variable-length array declaration expected"); 459 } 460 } 461 } 462 463 static void 464 get_prog_declaration(declaration *dec, defkind dkind, int num /* arg number */) 465 { 466 token tok; 467 char name[255]; /* argument name */ 468 469 if (dkind == DEF_PROGRAM) { 470 peek(&tok); 471 if (tok.kind == TOK_RPAREN) { /* no arguments */ 472 dec->rel = REL_ALIAS; 473 dec->type = "void"; 474 dec->prefix = NULL; 475 dec->name = NULL; 476 return; 477 } 478 } 479 get_type(&dec->prefix, &dec->type, dkind); 480 dec->rel = REL_ALIAS; 481 if (peekscan(TOK_IDENT, &tok)) /* optional name of argument */ 482 strcpy(name, tok.str); 483 else 484 sprintf(name, "%s%d", ARGNAME, num); /* default name of 485 * argument */ 486 487 dec->name = strdup(name); 488 489 if (streq(dec->type, "void")) { 490 return; 491 } 492 if (streq(dec->type, "opaque")) { 493 error("Opaque -- illegal argument type"); 494 } 495 if (peekscan(TOK_STAR, &tok)) { 496 if (streq(dec->type, "string")) { 497 error("Pointer to string not allowed in program arguments\n"); 498 } 499 dec->rel = REL_POINTER; 500 if (peekscan(TOK_IDENT, &tok)) /* optional name of argument */ 501 dec->name = strdup(tok.str); 502 } 503 if (peekscan(TOK_LANGLE, &tok)) { 504 if (!streq(dec->type, "string")) { 505 error("Arrays cannot be declared as arguments to procedures -- use typedef"); 506 } 507 dec->rel = REL_ARRAY; 508 if (peekscan(TOK_RANGLE, &tok)) { 509 dec->array_max = "(unsigned int)~0"; 510 /* unspecified size, use max */ 511 } else { 512 scan_num(&tok); 513 dec->array_max = tok.str; 514 scan(TOK_RANGLE, &tok); 515 } 516 } 517 if (streq(dec->type, "string")) { 518 if (dec->rel != REL_ARRAY) { /* .x specifies just string as 519 * type of argument - make it 520 * string<> */ 521 dec->rel = REL_ARRAY; 522 dec->array_max = "(unsigned int)~0"; 523 /* unspecified size, use max */ 524 } 525 } 526 } 527 528 529 530 static void 531 get_type(const char **prefixp, const char **typep, defkind dkind) 532 { 533 token tok; 534 535 *prefixp = NULL; 536 get_token(&tok); 537 switch (tok.kind) { 538 case TOK_IDENT: 539 *typep = tok.str; 540 break; 541 case TOK_STRUCT: 542 case TOK_ENUM: 543 case TOK_UNION: 544 *prefixp = tok.str; 545 scan(TOK_IDENT, &tok); 546 *typep = tok.str; 547 break; 548 case TOK_UNSIGNED: 549 unsigned_dec(typep); 550 break; 551 case TOK_SHORT: 552 *typep = "short"; 553 (void) peekscan(TOK_INT, &tok); 554 break; 555 case TOK_LONG: 556 *typep = "long"; 557 (void) peekscan(TOK_INT, &tok); 558 break; 559 case TOK_HYPER: 560 *typep = "longlong_t"; 561 (void) peekscan(TOK_INT, &tok); 562 break; 563 case TOK_VOID: 564 if (dkind != DEF_UNION && dkind != DEF_PROGRAM) { 565 error("Void is allowed only inside union and program definitions with one argument"); 566 } 567 *typep = tok.str; 568 break; 569 case TOK_STRING: 570 case TOK_OPAQUE: 571 case TOK_CHAR: 572 case TOK_INT: 573 case TOK_FLOAT: 574 case TOK_DOUBLE: 575 case TOK_BOOL: 576 case TOK_QUAD: 577 *typep = tok.str; 578 break; 579 default: 580 error("Type specifier expected"); 581 } 582 } 583 584 static void 585 unsigned_dec(const char **typep) 586 { 587 token tok; 588 589 peek(&tok); 590 switch (tok.kind) { 591 case TOK_CHAR: 592 get_token(&tok); 593 *typep = "u_char"; 594 break; 595 case TOK_SHORT: 596 get_token(&tok); 597 *typep = "u_short"; 598 (void) peekscan(TOK_INT, &tok); 599 break; 600 case TOK_LONG: 601 get_token(&tok); 602 *typep = "u_long"; 603 (void) peekscan(TOK_INT, &tok); 604 break; 605 case TOK_HYPER: 606 get_token(&tok); 607 *typep = "u_longlong_t"; 608 (void) peekscan(TOK_INT, &tok); 609 break; 610 case TOK_INT: 611 get_token(&tok); 612 *typep = "u_int"; 613 break; 614 default: 615 *typep = "u_int"; 616 break; 617 } 618 } 619
Indexes created Sun Sep 21 20:09:37 GMT 2025