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 30 /* 31 * rpc_cout.c, XDR routine outputter for the RPC protocol compiler 32 * Copyright (C) 1987, Sun Microsystems, Inc. 33 */ 34 #include <ctype.h> 35 #include <stdio.h> 36 #include <string.h> 37 #include "rpc_parse.h" 38 #include "rpc_scan.h" 39 #include "rpc_util.h" 40 41 static void print_header( definition * ); 42 static void print_trailer( void ); 43 static void print_stat( int , declaration * ); 44 static void emit_enum( definition * ); 45 static void emit_program( definition * ); 46 static void emit_union( definition * ); 47 static void emit_struct( definition * ); 48 static void emit_typedef( definition * ); 49 static void emit_inline( int, declaration *, int ); 50 static void emit_single_in_line( int, declaration *, int, relation ); 51 52 /* 53 * Emit the C-routine for the given definition 54 */ 55 void 56 emit(definition *def) 57 { 58 if (def->def_kind == DEF_CONST) { 59 return; 60 } 61 if (def->def_kind == DEF_PROGRAM) { 62 emit_program(def); 63 return; 64 } 65 if (def->def_kind == DEF_TYPEDEF) { 66 /* 67 * now we need to handle declarations like 68 * struct typedef foo foo; 69 * since we dont want this to be expanded into 2 calls to xdr_foo 70 */ 71 72 if (strcmp(def->def.ty.old_type, def->def_name) == 0) 73 return; 74 } 75 print_header(def); 76 switch (def->def_kind) { 77 case DEF_UNION: 78 emit_union(def); 79 break; 80 case DEF_ENUM: 81 emit_enum(def); 82 break; 83 case DEF_STRUCT: 84 emit_struct(def); 85 break; 86 case DEF_TYPEDEF: 87 emit_typedef(def); 88 break; 89 /* DEF_CONST and DEF_PROGRAM have already been handled */ 90 default: 91 break; 92 } 93 print_trailer(); 94 } 95 96 static int 97 findtype(definition *def, const char *type) 98 { 99 100 if (def->def_kind == DEF_PROGRAM || def->def_kind == DEF_CONST) { 101 return (0); 102 } else { 103 return (streq(def->def_name, type)); 104 } 105 } 106 107 static int 108 undefined(const char *type) 109 { 110 definition *def; 111 112 def = (definition *) FINDVAL(defined, type, findtype); 113 return (def == NULL); 114 } 115 116 117 static void 118 print_generic_header(const char *procname, int pointerp) 119 { 120 f_print(fout, "\n"); 121 f_print(fout, "bool_t\n"); 122 f_print(fout, "xdr_%s(", procname); 123 f_print(fout, "XDR *xdrs, "); 124 f_print(fout, "%s ", procname); 125 if (pointerp) 126 f_print(fout, "*"); 127 f_print(fout, "objp)\n{\n\n"); 128 } 129 130 static void 131 print_header(definition *def) 132 { 133 print_generic_header(def->def_name, 134 def->def_kind != DEF_TYPEDEF || 135 !isvectordef(def->def.ty.old_type, 136 def->def.ty.rel)); 137 /* Now add Inline support */ 138 139 if (inline_size == 0) 140 return; 141 /* May cause lint to complain. but ... */ 142 f_print(fout, "\tregister long *buf;\n\n"); 143 } 144 145 static void 146 print_prog_header(proc_list *plist) 147 { 148 print_generic_header(plist->args.argname, 1); 149 } 150 151 static void 152 print_trailer(void) 153 { 154 f_print(fout, "\treturn (TRUE);\n"); 155 f_print(fout, "}\n"); 156 } 157 158 159 static void 160 print_ifopen(int indent, const char *name) 161 { 162 tabify(fout, indent); 163 f_print(fout, "if (!xdr_%s(xdrs", name); 164 } 165 166 static void 167 print_ifarg(const char *arg) 168 { 169 f_print(fout, ", %s", arg); 170 } 171 172 static void 173 print_ifsizeof(int indent, const char *prefix, const char *type) 174 { 175 if (indent) { 176 f_print(fout, ",\n"); 177 tabify(fout, indent); 178 } else { 179 f_print(fout, ", "); 180 } 181 if (streq(type, "bool")) { 182 f_print(fout, "sizeof (bool_t), (xdrproc_t) xdr_bool"); 183 } else { 184 f_print(fout, "sizeof ("); 185 if (undefined(type) && prefix) { 186 f_print(fout, "%s ", prefix); 187 } 188 f_print(fout, "%s), (xdrproc_t) xdr_%s", type, type); 189 } 190 } 191 192 static void 193 print_ifclose(int indent, int brace) 194 { 195 f_print(fout, "))\n"); 196 tabify(fout, indent); 197 f_print(fout, "\treturn (FALSE);\n"); 198 if (brace) 199 f_print(fout, "\t}\n"); 200 } 201 202 static void 203 print_ifstat(int indent, const char *prefix, const char *type, relation rel, 204 const char *amax, const char *objname, const char *name) 205 { 206 const char *alt = NULL; 207 int brace = 0; 208 209 switch (rel) { 210 case REL_POINTER: 211 brace = 1; 212 f_print(fout, "\t{\n"); 213 f_print(fout, "\t%s **pp = %s;\n", type, objname); 214 print_ifopen(indent, "pointer"); 215 print_ifarg("(char **)"); 216 f_print(fout, "pp"); 217 print_ifsizeof(0, prefix, type); 218 break; 219 case REL_VECTOR: 220 if (streq(type, "string")) { 221 alt = "string"; 222 } else if (streq(type, "opaque")) { 223 alt = "opaque"; 224 } 225 if (alt) { 226 print_ifopen(indent, alt); 227 print_ifarg(objname); 228 } else { 229 print_ifopen(indent, "vector"); 230 print_ifarg("(char *)"); 231 f_print(fout, "%s", objname); 232 } 233 print_ifarg(amax); 234 if (!alt) { 235 print_ifsizeof(indent + 1, prefix, type); 236 } 237 break; 238 case REL_ARRAY: 239 if (streq(type, "string")) { 240 alt = "string"; 241 } else if (streq(type, "opaque")) { 242 alt = "bytes"; 243 } 244 if (streq(type, "string")) { 245 print_ifopen(indent, alt); 246 print_ifarg(objname); 247 } else { 248 if (alt) { 249 print_ifopen(indent, alt); 250 } else { 251 print_ifopen(indent, "array"); 252 } 253 print_ifarg("(char **)"); 254 if (*objname == '&') { 255 f_print(fout, "%s.%s_val, (u_int *) %s.%s_len", 256 objname, name, objname, name); 257 } else { 258 f_print(fout, 259 "&%s->%s_val, (u_int *) &%s->%s_len", 260 objname, name, objname, name); 261 } 262 } 263 print_ifarg(amax); 264 if (!alt) { 265 print_ifsizeof(indent + 1, prefix, type); 266 } 267 break; 268 case REL_ALIAS: 269 print_ifopen(indent, type); 270 print_ifarg(objname); 271 break; 272 } 273 print_ifclose(indent, brace); 274 } 275 276 /* ARGSUSED */ 277 static void 278 emit_enum(definition *def __unused) 279 { 280 print_ifopen(1, "enum"); 281 print_ifarg("(enum_t *)objp"); 282 print_ifclose(1, 0); 283 } 284 285 static void 286 emit_program(definition *def) 287 { 288 decl_list *dl; 289 version_list *vlist; 290 proc_list *plist; 291 292 for (vlist = def->def.pr.versions; vlist != NULL; vlist = vlist->next) 293 for (plist = vlist->procs; plist != NULL; plist = plist->next) { 294 if (!newstyle || plist->arg_num < 2) 295 continue; /* old style, or single argument */ 296 print_prog_header(plist); 297 for (dl = plist->args.decls; dl != NULL; 298 dl = dl->next) 299 print_stat(1, &dl->decl); 300 print_trailer(); 301 } 302 } 303 304 305 static void 306 emit_union(definition *def) 307 { 308 declaration *dflt; 309 case_list *cl; 310 declaration *cs; 311 char *object; 312 const char *vecformat = "objp->%s_u.%s"; 313 const char *format = "&objp->%s_u.%s"; 314 315 print_stat(1, &def->def.un.enum_decl); 316 f_print(fout, "\tswitch (objp->%s) {\n", def->def.un.enum_decl.name); 317 for (cl = def->def.un.cases; cl != NULL; cl = cl->next) { 318 319 f_print(fout, "\tcase %s:\n", cl->case_name); 320 if (cl->contflag == 1) /* a continued case statement */ 321 continue; 322 cs = &cl->case_decl; 323 if (!streq(cs->type, "void")) { 324 object = xmalloc(strlen(def->def_name) + 325 strlen(format) + strlen(cs->name) + 1); 326 if (isvectordef (cs->type, cs->rel)) { 327 s_print(object, vecformat, def->def_name, 328 cs->name); 329 } else { 330 s_print(object, format, def->def_name, 331 cs->name); 332 } 333 print_ifstat(2, cs->prefix, cs->type, cs->rel, 334 cs->array_max, object, cs->name); 335 free(object); 336 } 337 f_print(fout, "\t\tbreak;\n"); 338 } 339 dflt = def->def.un.default_decl; 340 if (dflt != NULL) { 341 if (!streq(dflt->type, "void")) { 342 f_print(fout, "\tdefault:\n"); 343 object = xmalloc(strlen(def->def_name) + 344 strlen(format) + strlen(dflt->name) + 1); 345 if (isvectordef (dflt->type, dflt->rel)) { 346 s_print(object, vecformat, def->def_name, 347 dflt->name); 348 } else { 349 s_print(object, format, def->def_name, 350 dflt->name); 351 } 352 353 print_ifstat(2, dflt->prefix, dflt->type, dflt->rel, 354 dflt->array_max, object, dflt->name); 355 free(object); 356 f_print(fout, "\t\tbreak;\n"); 357 } else { 358 f_print(fout, "\tdefault:\n"); 359 f_print(fout, "\t\tbreak;\n"); 360 } 361 } else { 362 f_print(fout, "\tdefault:\n"); 363 f_print(fout, "\t\treturn (FALSE);\n"); 364 } 365 366 f_print(fout, "\t}\n"); 367 } 368 369 static void 370 inline_struct(definition *def, int flag) 371 { 372 decl_list *dl; 373 int i, size; 374 decl_list *cur, *psav; 375 bas_type *ptr; 376 char *sizestr; 377 const char *plus; 378 char ptemp[256]; 379 int indent = 1; 380 381 cur = NULL; 382 if (flag == PUT) 383 f_print(fout, "\n\tif (xdrs->x_op == XDR_ENCODE) {\n"); 384 else 385 f_print(fout, "\t\treturn (TRUE);\n\t} else if (xdrs->x_op == XDR_DECODE) {\n"); 386 387 i = 0; 388 size = 0; 389 sizestr = NULL; 390 for (dl = def->def.st.decls; dl != NULL; dl = dl->next) { /* xxx */ 391 /* now walk down the list and check for basic types */ 392 if ((dl->decl.prefix == NULL) && 393 ((ptr = find_type(dl->decl.type)) != NULL) && 394 ((dl->decl.rel == REL_ALIAS) || 395 (dl->decl.rel == REL_VECTOR))){ 396 if (i == 0) 397 cur = dl; 398 i++; 399 400 if (dl->decl.rel == REL_ALIAS) 401 size += ptr->length; 402 else { 403 /* this code is required to handle arrays */ 404 if (sizestr == NULL) 405 plus = ""; 406 else 407 plus = " + "; 408 409 if (ptr->length != 1) 410 s_print(ptemp, "%s%s * %d", 411 plus, dl->decl.array_max, 412 ptr->length); 413 else 414 s_print(ptemp, "%s%s", plus, 415 dl->decl.array_max); 416 417 /* now concatenate to sizestr !!!! */ 418 if (sizestr == NULL) { 419 sizestr = xstrdup(ptemp); 420 } 421 else{ 422 sizestr = xrealloc(sizestr, 423 strlen(sizestr) 424 +strlen(ptemp)+1); 425 sizestr = strcat(sizestr, ptemp); 426 /* build up length of array */ 427 } 428 } 429 } else { 430 if (i > 0) { 431 if (sizestr == NULL && size < inline_size){ 432 /* 433 * don't expand into inline code 434 * if size < inline_size 435 */ 436 while (cur != dl){ 437 print_stat(indent + 1, &cur->decl); 438 cur = cur->next; 439 } 440 } else { 441 /* were already looking at a xdr_inlineable structure */ 442 tabify(fout, indent + 1); 443 if (sizestr == NULL) 444 f_print(fout, "buf = XDR_INLINE(xdrs, %d * BYTES_PER_XDR_UNIT);", 445 size); 446 else { 447 if (size == 0) 448 f_print(fout, 449 "buf = XDR_INLINE(xdrs, (%s) * BYTES_PER_XDR_UNIT);", 450 sizestr); 451 else 452 f_print(fout, 453 "buf = XDR_INLINE(xdrs, (%d + (%s)) * BYTES_PER_XDR_UNIT);", 454 size, sizestr); 455 456 } 457 f_print(fout, "\n"); 458 tabify(fout, indent + 1); 459 f_print(fout, 460 "if (buf == NULL) {\n"); 461 462 psav = cur; 463 while (cur != dl){ 464 print_stat(indent + 2, &cur->decl); 465 cur = cur->next; 466 } 467 468 f_print(fout, "\n\t\t} else {\n"); 469 470 cur = psav; 471 while (cur != dl){ 472 emit_inline(indent + 2, &cur->decl, flag); 473 cur = cur->next; 474 } 475 476 tabify(fout, indent + 1); 477 f_print(fout, "}\n"); 478 } 479 } 480 size = 0; 481 i = 0; 482 free(sizestr); 483 sizestr = NULL; 484 print_stat(indent + 1, &dl->decl); 485 } 486 } 487 488 if (i > 0) { 489 if (sizestr == NULL && size < inline_size){ 490 /* don't expand into inline code if size < inline_size */ 491 while (cur != dl){ 492 print_stat(indent + 1, &cur->decl); 493 cur = cur->next; 494 } 495 } else { 496 /* were already looking at a xdr_inlineable structure */ 497 if (sizestr == NULL) 498 f_print(fout, "\t\tbuf = XDR_INLINE(xdrs, %d * BYTES_PER_XDR_UNIT);", 499 size); 500 else 501 if (size == 0) 502 f_print(fout, 503 "\t\tbuf = XDR_INLINE(xdrs, (%s) * BYTES_PER_XDR_UNIT);", 504 sizestr); 505 else 506 f_print(fout, 507 "\t\tbuf = XDR_INLINE(xdrs, (%d + (%s)) * BYTES_PER_XDR_UNIT);", 508 size, sizestr); 509 510 f_print(fout, "\n\t\tif (buf == NULL) {\n"); 511 psav = cur; 512 while (cur != NULL){ 513 print_stat(indent + 2, &cur->decl); 514 cur = cur->next; 515 } 516 f_print(fout, "\t\t} else {\n"); 517 518 cur = psav; 519 while (cur != dl){ 520 emit_inline(indent + 2, &cur->decl, flag); 521 cur = cur->next; 522 } 523 f_print(fout, "\t\t}\n"); 524 } 525 } 526 } 527 528 static void 529 emit_struct(definition *def) 530 { 531 decl_list *dl; 532 int j, size, flag; 533 bas_type *ptr; 534 int can_inline; 535 536 if (inline_size == 0) { 537 /* No xdr_inlining at all */ 538 for (dl = def->def.st.decls; dl != NULL; dl = dl->next) 539 print_stat(1, &dl->decl); 540 return; 541 } 542 543 for (dl = def->def.st.decls; dl != NULL; dl = dl->next) 544 if (dl->decl.rel == REL_VECTOR && 545 strcmp(dl->decl.type, "opaque") != 0){ 546 f_print(fout, "\tint i;\n"); 547 break; 548 } 549 550 size = 0; 551 can_inline = 0; 552 /* 553 * Make a first pass and see if inling is possible. 554 */ 555 for (dl = def->def.st.decls; dl != NULL; dl = dl->next) 556 if ((dl->decl.prefix == NULL) && 557 ((ptr = find_type(dl->decl.type)) != NULL) && 558 ((dl->decl.rel == REL_ALIAS)|| 559 (dl->decl.rel == REL_VECTOR))){ 560 if (dl->decl.rel == REL_ALIAS) 561 size += ptr->length; 562 else { 563 can_inline = 1; 564 break; /* can be inlined */ 565 } 566 } else { 567 if (size >= inline_size){ 568 can_inline = 1; 569 break; /* can be inlined */ 570 } 571 size = 0; 572 } 573 if (size >= inline_size) 574 can_inline = 1; 575 576 if (can_inline == 0){ /* can not inline, drop back to old mode */ 577 for (dl = def->def.st.decls; dl != NULL; dl = dl->next) 578 print_stat(1, &dl->decl); 579 return; 580 } 581 582 flag = PUT; 583 for (j = 0; j < 2; j++){ 584 inline_struct(def, flag); 585 if (flag == PUT) 586 flag = GET; 587 } 588 589 f_print(fout, "\t\treturn (TRUE);\n\t}\n\n"); 590 591 /* now take care of XDR_FREE case */ 592 593 for (dl = def->def.st.decls; dl != NULL; dl = dl->next) 594 print_stat(1, &dl->decl); 595 596 } 597 598 static void 599 emit_typedef(definition *def) 600 { 601 const char *prefix = def->def.ty.old_prefix; 602 const char *type = def->def.ty.old_type; 603 const char *amax = def->def.ty.array_max; 604 relation rel = def->def.ty.rel; 605 606 print_ifstat(1, prefix, type, rel, amax, "objp", def->def_name); 607 } 608 609 static void 610 print_stat(int indent, declaration *dec) 611 { 612 const char *prefix = dec->prefix; 613 const char *type = dec->type; 614 const char *amax = dec->array_max; 615 relation rel = dec->rel; 616 char name[256]; 617 618 if (isvectordef(type, rel)) { 619 s_print(name, "objp->%s", dec->name); 620 } else { 621 s_print(name, "&objp->%s", dec->name); 622 } 623 print_ifstat(indent, prefix, type, rel, amax, name, dec->name); 624 } 625 626 627 char *upcase(const char *); 628 629 static void 630 emit_inline(int indent, declaration *decl, int flag) 631 { 632 switch (decl->rel) { 633 case REL_ALIAS : 634 emit_single_in_line(indent, decl, flag, REL_ALIAS); 635 break; 636 case REL_VECTOR : 637 tabify(fout, indent); 638 f_print(fout, "{\n"); 639 tabify(fout, indent + 1); 640 f_print(fout, "%s *genp;\n\n", decl->type); 641 tabify(fout, indent + 1); 642 f_print(fout, 643 "for (i = 0, genp = objp->%s;\n", decl->name); 644 tabify(fout, indent + 2); 645 f_print(fout, "i < %s; i++) {\n", decl->array_max); 646 emit_single_in_line(indent + 2, decl, flag, REL_VECTOR); 647 tabify(fout, indent + 1); 648 f_print(fout, "}\n"); 649 tabify(fout, indent); 650 f_print(fout, "}\n"); 651 break; 652 default: 653 break; 654 } 655 } 656 657 static void 658 emit_single_in_line(int indent, declaration *decl, int flag, relation rel) 659 { 660 char *upp_case; 661 662 tabify(fout, indent); 663 if (flag == PUT) 664 f_print(fout, "IXDR_PUT_"); 665 else 666 if (rel == REL_ALIAS) 667 f_print(fout, "objp->%s = IXDR_GET_", decl->name); 668 else 669 f_print(fout, "*genp++ = IXDR_GET_"); 670 671 upp_case = upcase(decl->type); 672 673 /* hack - XX */ 674 if (strcmp(upp_case, "INT") == 0) 675 { 676 free(upp_case); 677 upp_case = strdup("LONG"); 678 } 679 680 if (strcmp(upp_case, "U_INT") == 0) 681 { 682 free(upp_case); 683 upp_case = strdup("U_LONG"); 684 } 685 if (flag == PUT) 686 if (rel == REL_ALIAS) 687 f_print(fout, 688 "%s(buf, objp->%s);\n", upp_case, decl->name); 689 else 690 f_print(fout, "%s(buf, *genp++);\n", upp_case); 691 692 else 693 f_print(fout, "%s(buf);\n", upp_case); 694 free(upp_case); 695 } 696 697 char * 698 upcase(const char *str) 699 { 700 char *ptr, *hptr; 701 702 ptr = (char *)xmalloc(strlen(str)+1); 703 704 hptr = ptr; 705 while (*str != '\0') 706 *ptr++ = toupper(*str++); 707 708 *ptr = '\0'; 709 return (hptr); 710 } 711