tools/widl/header.c

   1 /*
   2  * IDL Compiler
   3  *
   4  * Copyright 2002 Ove Kaaven
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #ifdef HAVE_UNISTD_H
  26 # include <unistd.h>
  27 #endif
  28 #include <string.h>
  29 #include <assert.h>
  30 #include <ctype.h>
  31 #include <signal.h>
  32
  33 #include "widl.h"
  34 #include "utils.h"
  35 #include "parser.h"
  36 #include "header.h"
  37
  38 static int indentation = 0;
  39
  40 static void indent(int delta)
  41 {
  42   int c;
  43   if (delta < 0) indentation += delta;
  44   for (c=0; c<indentation; c++) fprintf(header, "    ");
  45   if (delta > 0) indentation += delta;
  46 }
  47
  48 int is_attr(attr_t *a, enum attr_type t)
  49 {
  50   while (a) {
  51     if (a->type == t) return 1;
  52     a = NEXT_LINK(a);
  53   }
  54   return 0;
  55 }
  56
  57 void *get_attrp(attr_t *a, enum attr_type t)
  58 {
  59   while (a) {
  60     if (a->type == t) return a->u.pval;
  61     a = NEXT_LINK(a);
  62   }
  63   return NULL;
  64 }
  65
  66 unsigned long get_attrv(attr_t *a, enum attr_type t)
  67 {
  68   while (a) {
  69     if (a->type == t) return a->u.ival;
  70     a = NEXT_LINK(a);
  71   }
  72   return 0;
  73 }
  74
  75 int is_void(type_t *t, var_t *v)
  76 {
  77   if (v && v->ptr_level) return 0;
  78   if (!t->type && !t->ref) return 1;
  79   return 0;
  80 }
  81
  82 static void write_pident(FILE *h, var_t *v)
  83 {
  84   int c;
  85   for (c=0; c<v->ptr_level; c++) {
  86     fprintf(h, "*");
  87   }
  88   if (v->name) fprintf(h, "%s", v->name);
  89 }
  90
  91 void write_name(FILE *h, var_t *v)
  92 {
  93   fprintf(h, "%s", v->name);
  94 }
  95
  96 char* get_name(var_t *v)
  97 {
  98   return v->name;
  99 }
 100
 101 static void write_array(FILE *h, expr_t *v, int field)
 102 {
 103   if (!v) return;
 104   while (NEXT_LINK(v)) v = NEXT_LINK(v);
 105   fprintf(h, "[");
 106   while (v) {
 107     if (v->is_const)
 108       fprintf(h, "%ld", v->cval); /* statically sized array */
 109     else
 110       if (field) fprintf(h, "1"); /* dynamically sized array */
 111     if (PREV_LINK(v))
 112       fprintf(h, ", ");
 113     v = PREV_LINK(v);
 114   }
 115   fprintf(h, "]");
 116 }
 117
 118 static void write_field(FILE *h, var_t *v)
 119 {
 120   if (!v) return;
 121   if (v->type) {
 122     indent(0);
 123     write_type(h, v->type, NULL, v->tname);
 124     if (get_name(v)) {
 125       fprintf(h, " ");
 126       write_pident(h, v);
 127     }
 128     else {
 129       /* not all C/C++ compilers support anonymous structs and unions */
 130       switch (v->type->type) {
 131       case RPC_FC_STRUCT:
 132       case RPC_FC_ENCAPSULATED_UNION:
 133         fprintf(h, " DUMMYSTRUCTNAME");
 134         break;
 135       case RPC_FC_NON_ENCAPSULATED_UNION:
 136         fprintf(h, " DUMMYUNIONNAME");
 137         break;
 138       default:
 139         /* ? */
 140         break;
 141       }
 142     }
 143     write_array(h, v->array, 1);
 144     fprintf(h, ";\n");
 145   }
 146 }
 147
 148 static void write_fields(FILE *h, var_t *v)
 149 {
 150   var_t *first = v;
 151   if (!v) return;
 152   while (NEXT_LINK(v)) v = NEXT_LINK(v);
 153   while (v) {
 154     write_field(h, v);
 155     if (v == first) break;
 156     v = PREV_LINK(v);
 157   }
 158 }
 159
 160 static void write_enums(FILE *h, var_t *v)
 161 {
 162   if (!v) return;
 163   while (NEXT_LINK(v)) v = NEXT_LINK(v);
 164   while (v) {
 165     if (get_name(v)) {
 166       indent(0);
 167       write_name(h, v);
 168       if (v->eval) {
 169         fprintf(h, " = ");
 170         write_expr(h, v->eval);
 171       }
 172     }
 173     if (PREV_LINK(v))
 174       fprintf(h, ",\n");
 175     v = PREV_LINK(v);
 176   }
 177   fprintf(h, "\n");
 178 }
 179
 180 void write_type(FILE *h, type_t *t, var_t *v, char *n)
 181 {
 182   int c;
 183
 184   if (n) fprintf(h, "%s", n);
 185   else {
 186     if (t->is_const) fprintf(h, "const ");
 187     if (t->type) {
 188       if (t->sign > 0) fprintf(h, "signed ");
 189       else if (t->sign < 0) fprintf(h, "unsigned ");
 190       switch (t->type) {
 191       case RPC_FC_BYTE:
 192         if (t->ref) fprintf(h, t->ref->name);
 193         else fprintf(h, "byte");
 194         break;
 195       case RPC_FC_CHAR:
 196         if (t->ref) fprintf(h, t->ref->name);
 197         else fprintf(h, "char");
 198         break;
 199       case RPC_FC_WCHAR:
 200         fprintf(h, "wchar_t");
 201         break;
 202       case RPC_FC_USHORT:
 203       case RPC_FC_SHORT:
 204         if (t->ref) fprintf(h, t->ref->name);
 205         else fprintf(h, "short");
 206         break;
 207       case RPC_FC_ULONG:
 208       case RPC_FC_LONG:
 209         if (t->ref) fprintf(h, t->ref->name);
 210         else fprintf(h, "long");
 211         break;
 212       case RPC_FC_HYPER:
 213         if (t->ref) fprintf(h, t->ref->name);
 214         else fprintf(h, "hyper");
 215         break;
 216       case RPC_FC_FLOAT:
 217         fprintf(h, "float");
 218         break;
 219       case RPC_FC_DOUBLE:
 220         fprintf(h, "double");
 221         break;
 222       case RPC_FC_ENUM16:
 223       case RPC_FC_ENUM32:
 224         if (t->defined && !t->written) {
 225           if (t->name) fprintf(h, "enum %s {\n", t->name);
 226           else fprintf(h, "enum {\n");
 227           t->written = TRUE;
 228           indentation++;
 229           write_enums(h, t->fields);
 230           indent(-1);
 231           fprintf(h, "}");
 232         }
 233         else fprintf(h, "enum %s", t->name);
 234         break;
 235       case RPC_FC_ERROR_STATUS_T:
 236         if (t->ref) fprintf(h, t->ref->name);
 237         else fprintf(h, "error_status_t");
 238         break;
 239       case RPC_FC_BIND_PRIMITIVE:
 240         if (t->ref) fprintf(h, t->ref->name);
 241         else fprintf(h, "handle_t");
 242         break;
 243       case RPC_FC_STRUCT:
 244       case RPC_FC_ENCAPSULATED_UNION:
 245         if (t->defined && !t->written) {
 246           if (t->name) fprintf(h, "struct %s {\n", t->name);
 247           else fprintf(h, "struct {\n");
 248           t->written = TRUE;
 249           indentation++;
 250           write_fields(h, t->fields);
 251           indent(-1);
 252           fprintf(h, "}");
 253         }
 254         else fprintf(h, "struct %s", t->name);
 255         break;
 256       case RPC_FC_NON_ENCAPSULATED_UNION:
 257         if (t->defined && !t->written) {
 258           if (t->name) fprintf(h, "union %s {\n", t->name);
 259           else fprintf(h, "union {\n");
 260           t->written = TRUE;
 261           indentation++;
 262           write_fields(h, t->fields);
 263           indent(-1);
 264           fprintf(h, "}");
 265         }
 266         else fprintf(h, "union %s", t->name);
 267         break;
 268       default:
 269         fprintf(h, "(unknown-type:%d)", t->type);
 270       }
 271     }
 272     else {
 273       if (t->ref) {
 274         write_type(h, t->ref, NULL, t->name);
 275       }
 276       else fprintf(h, "void");
 277     }
 278   }
 279   if (v) {
 280     for (c=0; c<v->ptr_level; c++) {
 281       fprintf(h, "*");
 282     }
 283   }
 284 }
 285
 286 void write_typedef(type_t *type, var_t *names)
 287 {
 288   char *tname = names->tname;
 289   var_t *lname;
 290   while (NEXT_LINK(names)) names = NEXT_LINK(names);
 291   lname = names;
 292   fprintf(header, "typedef ");
 293   write_type(header, type, NULL, tname);
 294   fprintf(header, " ");
 295   while (names) {
 296     write_pident(header, names);
 297     if (PREV_LINK(names))
 298       fprintf(header, ", ");
 299     names = PREV_LINK(names);
 300   }
 301   fprintf(header, ";\n");
 302
 303   if (get_attrp(type->attrs, ATTR_WIREMARSHAL)) {
 304     names = lname;
 305     while (names) {
 306       char *name = get_name(names);
 307       fprintf(header, "unsigned long   __RPC_USER %s_UserSize     (unsigned long *, unsigned long,   %s *);\n", name, name);
 308       fprintf(header, "unsigned char * __RPC_USER %s_UserMarshal  (unsigned long *, unsigned char *, %s *);\n", name, name);
 309       fprintf(header, "unsigned char * __RPC_USER %s_UserUnmarshal(unsigned long *, unsigned char *, %s *);\n", name, name);
 310       fprintf(header, "void            __RPC_USER %s_UserFree     (unsigned long *, %s *);\n", name, name);
 311       if (PREV_LINK(names))
 312         fprintf(header, ", ");
 313       names = PREV_LINK(names);
 314     }
 315   }
 316
 317   fprintf(header, "\n");
 318 }
 319
 320 static void do_write_expr(FILE *h, expr_t *e, int p)
 321 {
 322   switch (e->type) {
 323   case EXPR_VOID:
 324     break;
 325   case EXPR_NUM:
 326     fprintf(h, "%ld", e->u.lval);
 327     break;
 328   case EXPR_HEXNUM:
 329     fprintf(h, "0x%lx", e->u.lval);
 330     break;
 331   case EXPR_IDENTIFIER:
 332     fprintf(h, "%s", e->u.sval);
 333     break;
 334   case EXPR_NEG:
 335     fprintf(h, "-");
 336     do_write_expr(h, e->ref, 1);
 337     break;
 338   case EXPR_NOT:
 339     fprintf(h, "~");
 340     do_write_expr(h, e->ref, 1);
 341     break;
 342   case EXPR_PPTR:
 343     fprintf(h, "*");
 344     do_write_expr(h, e->ref, 1);
 345     break;
 346   case EXPR_CAST:
 347     fprintf(h, "(");
 348     write_type(h, e->u.tref->ref, NULL, e->u.tref->name);
 349     fprintf(h, ")");
 350     do_write_expr(h, e->ref, 1);
 351     break;
 352   case EXPR_SIZEOF:
 353     fprintf(h, "sizeof(");
 354     write_type(h, e->u.tref->ref, NULL, e->u.tref->name);
 355     fprintf(h, ")");
 356     break;
 357   case EXPR_SHL:
 358   case EXPR_SHR:
 359   case EXPR_MUL:
 360   case EXPR_DIV:
 361   case EXPR_ADD:
 362   case EXPR_SUB:
 363   case EXPR_AND:
 364   case EXPR_OR:
 365     if (p) fprintf(h, "(");
 366     do_write_expr(h, e->ref, 1);
 367     switch (e->type) {
 368     case EXPR_SHL: fprintf(h, " << "); break;
 369     case EXPR_SHR: fprintf(h, " >> "); break;
 370     case EXPR_MUL: fprintf(h, " * "); break;
 371     case EXPR_DIV: fprintf(h, " / "); break;
 372     case EXPR_ADD: fprintf(h, " + "); break;
 373     case EXPR_SUB: fprintf(h, " - "); break;
 374     case EXPR_AND: fprintf(h, " & "); break;
 375     case EXPR_OR:  fprintf(h, " | "); break;
 376     default: break;
 377     }
 378     do_write_expr(h, e->u.ext, 1);
 379     if (p) fprintf(h, ")");
 380     break;
 381   case EXPR_COND:
 382     if (p) fprintf(h, "(");
 383     do_write_expr(h, e->ref, 1);
 384     fprintf(h, " ? ");
 385     do_write_expr(h, e->u.ext, 1);
 386     fprintf(h, " : ");
 387     do_write_expr(h, e->ext2, 1);
 388     if (p) fprintf(h, ")");
 389     break;
 390   }
 391 }
 392
 393 void write_expr(FILE *h, expr_t *e)
 394 {
 395   do_write_expr(h, e, 0);
 396 }
 397
 398 void write_constdef(var_t *v)
 399 {
 400   fprintf(header, "#define %s (", get_name(v));
 401   write_expr(header, v->eval);
 402   fprintf(header, ")\n\n");
 403 }
 404
 405 void write_externdef(var_t *v)
 406 {
 407   fprintf(header, "extern const ");
 408   write_type(header, v->type, NULL, v->tname);
 409   if (get_name(v)) {
 410     fprintf(header, " ");
 411     write_pident(header, v);
 412   }
 413   fprintf(header, ";\n\n");
 414 }
 415
 416 /********** INTERFACES **********/
 417
 418 int is_object(attr_t *a)
 419 {
 420   while (a) {
 421     if (a->type == ATTR_OBJECT || a->type == ATTR_ODL) return 1;
 422     a = NEXT_LINK(a);
 423   }
 424   return 0;
 425 }
 426
 427 int is_local(attr_t *a)
 428 {
 429   return is_attr(a, ATTR_LOCAL);
 430 }
 431
 432 var_t *is_callas(attr_t *a)
 433 {
 434   return get_attrp(a, ATTR_CALLAS);
 435 }
 436
 437 static void write_icom_method_def(type_t *iface)
 438 {
 439   func_t *cur = iface->funcs;
 440   if (iface->ref) write_icom_method_def( iface->ref );
 441   if (!cur) return;
 442   while (NEXT_LINK(cur)) cur = NEXT_LINK(cur);
 443   if (cur) fprintf( header, " \\\n    /*** %s methods ***/", iface->name );
 444   while (cur) {
 445     var_t *def = cur->def;
 446     if (!is_callas(def->attrs)) {
 447       var_t *arg = cur->args;
 448
 449       if (arg) {
 450         while (NEXT_LINK(arg)) {
 451           arg = NEXT_LINK(arg);
 452         }
 453       }
 454       fprintf(header, " \\\n    STDMETHOD_(");
 455       write_type(header, def->type, def, def->tname);
 456       fprintf(header, ",");
 457       write_name(header, def);
 458       fprintf(header, ")(%s", arg ? "THIS_ " : "THIS" );
 459       while (arg) {
 460         write_type(header, arg->type, arg, arg->tname);
 461         if (arg->args)
 462         {
 463           fprintf(header, " (STDMETHODCALLTYPE *");
 464           write_name(header,arg);
 465           fprintf( header,")(");
 466           write_args(header, arg->args, NULL, 0, FALSE);
 467           fprintf(header,")");
 468         }
 469         else
 470         {
 471           fprintf(header, " ");
 472           write_name(header,arg);
 473         }
 474         write_array(header, arg->array, 0);
 475         arg = PREV_LINK(arg);
 476         if (arg) fprintf(header, ", ");
 477       }
 478       fprintf(header, ") PURE;");
 479     }
 480     cur = PREV_LINK(cur);
 481   }
 482 }
 483
 484 static int write_method_macro(type_t *iface, char *name)
 485 {
 486   int idx;
 487   func_t *cur = iface->funcs;
 488
 489   if (iface->ref) idx = write_method_macro(iface->ref, name);
 490   else idx = 0;
 491
 492   if (!cur) return idx;
 493   while (NEXT_LINK(cur)) cur = NEXT_LINK(cur);
 494
 495   fprintf(header, "/*** %s methods ***/\n", iface->name);
 496   while (cur) {
 497     var_t *def = cur->def;
 498     if (!is_callas(def->attrs)) {
 499       var_t *arg = cur->args;
 500       int argc = 0;
 501       int c;
 502       while (arg) {
 503         arg = NEXT_LINK(arg);
 504         argc++;
 505       }
 506
 507       fprintf(header, "#define %s_", name);
 508       write_name(header,def);
 509       fprintf(header, "(p");
 510       for (c=0; c<argc; c++)
 511         fprintf(header, ",%c", c+'a');
 512       fprintf(header, ") ");
 513
 514       fprintf(header, "(p)->lpVtbl->");
 515       write_name(header, def);
 516       fprintf(header, "(p");
 517       for (c=0; c<argc; c++)
 518         fprintf(header, ",%c", c+'a');
 519       fprintf(header, ")\n");
 520       if (cur->idx == -1) cur->idx = idx;
 521       else if (cur->idx != idx) yyerror("BUG: method index mismatch in write_method_macro");
 522       idx++;
 523     }
 524     cur = PREV_LINK(cur);
 525   }
 526   return idx;
 527 }
 528
 529 void write_args(FILE *h, var_t *arg, char *name, int method, int do_indent)
 530 {
 531   int count = 0;
 532   if (arg) {
 533     while (NEXT_LINK(arg))
 534       arg = NEXT_LINK(arg);
 535   }
 536   if (do_indent)
 537   {
 538       if (h == header) {
 539           indentation++;
 540           indent(0);
 541       } else fprintf(h, "    ");
 542   }
 543   if (method == 1) {
 544     fprintf(h, "%s* This", name);
 545     count++;
 546   }
 547   while (arg) {
 548     if (count) {
 549         if (do_indent)
 550         {
 551             fprintf(h, ",\n");
 552             if (h == header) indent(0);
 553             else fprintf(h, "    ");
 554         }
 555         else fprintf(h, ",");
 556     }
 557     write_type(h, arg->type, arg, arg->tname);
 558     if (arg->args)
 559     {
 560       fprintf(h, " (STDMETHODCALLTYPE *");
 561       write_name(h,arg);
 562       fprintf(h, ")(");
 563       write_args(h, arg->args, NULL, 0, FALSE);
 564       fprintf(h, ")");
 565     }
 566     else
 567     {
 568       fprintf(h, " ");
 569       write_name(h, arg);
 570     }
 571     write_array(h, arg->array, 0);
 572     arg = PREV_LINK(arg);
 573     count++;
 574   }
 575   if (do_indent && h == header) indentation--;
 576 }
 577
 578 static void write_cpp_method_def(type_t *iface)
 579 {
 580   func_t *cur = iface->funcs;
 581
 582   if (!cur) return;
 583   while (NEXT_LINK(cur)) cur = NEXT_LINK(cur);
 584   while (cur) {
 585     var_t *def = cur->def;
 586     if (!is_callas(def->attrs)) {
 587       indent(0);
 588       fprintf(header, "virtual ");
 589       write_type(header, def->type, def, def->tname);
 590       fprintf(header, " STDMETHODCALLTYPE ");
 591       write_name(header, def);
 592       fprintf(header, "(\n");
 593       write_args(header, cur->args, iface->name, 2, TRUE);
 594       fprintf(header, ") = 0;\n");
 595       fprintf(header, "\n");
 596     }
 597     cur = PREV_LINK(cur);
 598   }
 599 }
 600
 601 static void do_write_c_method_def(type_t *iface, char *name)
 602 {
 603   func_t *cur = iface->funcs;
 604
 605   if (iface->ref) do_write_c_method_def(iface->ref, name);
 606
 607   if (!cur) return;
 608   while (NEXT_LINK(cur)) cur = NEXT_LINK(cur);
 609   indent(0);
 610   fprintf(header, "/*** %s methods ***/\n", iface->name);
 611   while (cur) {
 612     var_t *def = cur->def;
 613     if (!is_callas(def->attrs)) {
 614       indent(0);
 615       write_type(header, def->type, def, def->tname);
 616       fprintf(header, " (STDMETHODCALLTYPE *");
 617       write_name(header, def);
 618       fprintf(header, ")(\n");
 619       write_args(header, cur->args, name, 1, TRUE);
 620       fprintf(header, ");\n");
 621       fprintf(header, "\n");
 622     }
 623     cur = PREV_LINK(cur);
 624   }
 625 }
 626
 627 static void write_c_method_def(type_t *iface)
 628 {
 629   do_write_c_method_def(iface, iface->name);
 630 }
 631
 632 static void write_method_proto(type_t *iface)
 633 {
 634   func_t *cur = iface->funcs;
 635
 636   if (!cur) return;
 637   while (NEXT_LINK(cur)) cur = NEXT_LINK(cur);
 638   while (cur) {
 639     var_t *def = cur->def;
 640     var_t *cas = is_callas(def->attrs);
 641     if (!is_local(def->attrs)) {
 642       /* proxy prototype */
 643       write_type(header, def->type, def, def->tname);
 644       fprintf(header, " CALLBACK %s_", iface->name);
 645       write_name(header, def);
 646       fprintf(header, "_Proxy(\n");
 647       write_args(header, cur->args, iface->name, 1, TRUE);
 648       fprintf(header, ");\n");
 649       /* stub prototype */
 650       fprintf(header, "void __RPC_STUB %s_", iface->name);
 651       write_name(header,def);
 652       fprintf(header, "_Stub(\n");
 653       fprintf(header, "    struct IRpcStubBuffer* This,\n");
 654       fprintf(header, "    struct IRpcChannelBuffer* pRpcChannelBuffer,\n");
 655       fprintf(header, "    PRPC_MESSAGE pRpcMessage,\n");
 656       fprintf(header, "    DWORD* pdwStubPhase);\n");
 657     }
 658     if (cas) {
 659       func_t *m = iface->funcs;
 660       while (m && strcmp(get_name(m->def), cas->name))
 661         m = NEXT_LINK(m);
 662       if (m) {
 663         var_t *mdef = m->def;
 664         /* proxy prototype - use local prototype */
 665         write_type(header, mdef->type, mdef, mdef->tname);
 666         fprintf(header, " CALLBACK %s_", iface->name);
 667         write_name(header, mdef);
 668         fprintf(header, "_Proxy(\n");
 669         write_args(header, m->args, iface->name, 1, TRUE);
 670         fprintf(header, ");\n");
 671         /* stub prototype - use remotable prototype */
 672         write_type(header, def->type, def, def->tname);
 673         fprintf(header, " __RPC_STUB %s_", iface->name);
 674         write_name(header, mdef);
 675         fprintf(header, "_Stub(\n");
 676         write_args(header, cur->args, iface->name, 1, TRUE);
 677         fprintf(header, ");\n");
 678       }
 679       else {
 680         yywarning("invalid call_as attribute (%s -> %s)\n", get_name(def), cas->name);
 681       }
 682     }
 683
 684     cur = PREV_LINK(cur);
 685   }
 686 }
 687
 688 static void write_function_proto(type_t *iface)
 689 {
 690   func_t *cur = iface->funcs;
 691   while (NEXT_LINK(cur)) cur = NEXT_LINK(cur);
 692   while (cur) {
 693     var_t *def = cur->def;
 694     /* FIXME: do we need to handle call_as? */
 695     write_type(header, def->type, def, def->tname);
 696     fprintf(header, " ");
 697     write_name(header, def);
 698     fprintf(header, "(\n");
 699     write_args(header, cur->args, iface->name, 0, TRUE);
 700     fprintf(header, ");\n");
 701
 702     cur = PREV_LINK(cur);
 703   }
 704 }
 705
 706 void write_forward(type_t *iface)
 707 {
 708   /* C/C++ forwards should only be written for object interfaces, so if we
 709    * have a full definition we only write one if we find [object] among the
 710    * attributes - however, if we don't have a full definition at this point
 711    * (i.e. this is an IDL forward), then we also assume that it is an object
 712    * interface, since non-object interfaces shouldn't need forwards */
 713   if ((!iface->defined || is_object(iface->attrs)) && !iface->written) {
 714     fprintf(header,"#ifndef __%s_FWD_DEFINED__\n", iface->name);
 715     fprintf(header,"#define __%s_FWD_DEFINED__\n", iface->name);
 716     fprintf(header, "typedef struct %s %s;\n", iface->name, iface->name);
 717     fprintf(header, "#endif\n\n" );
 718     iface->written = TRUE;
 719   }
 720 }
 721
 722 void write_guid(type_t *iface)
 723 {
 724   UUID *uuid = get_attrp(iface->attrs, ATTR_UUID);
 725   if (!uuid) return;
 726   fprintf(header, "DEFINE_GUID(IID_%s, 0x%08lx, 0x%04x, 0x%04x, 0x%02x,0x%02x, 0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x);\n",
 727           iface->name, uuid->Data1, uuid->Data2, uuid->Data3, uuid->Data4[0], uuid->Data4[1],
 728           uuid->Data4[2], uuid->Data4[3], uuid->Data4[4], uuid->Data4[5], uuid->Data4[6], uuid->Data4[7]);
 729 }
 730
 731 void write_com_interface(type_t *iface)
 732 {
 733   if (!iface->funcs && !iface->ref) {
 734     yywarning("%s has no methods", iface->name);
 735     return;
 736   }
 737
 738   fprintf(header, "/*****************************************************************************\n");
 739   fprintf(header, " * %s interface\n", iface->name);
 740   fprintf(header, " */\n");
 741   fprintf(header,"#ifndef __%s_INTERFACE_DEFINED__\n", iface->name);
 742   fprintf(header,"#define __%s_INTERFACE_DEFINED__\n\n", iface->name);
 743   write_guid(iface);
 744   write_forward(iface);
 745   /* C++ interface */
 746   fprintf(header, "#if defined(__cplusplus) && !defined(CINTERFACE)\n");
 747   if (iface->ref)
 748   {
 749       fprintf(header, "struct %s : public %s\n", iface->name, iface->ref->name);
 750       fprintf(header, "{\n");
 751       indentation++;
 752       write_cpp_method_def(iface);
 753       indentation--;
 754       fprintf(header, "};\n");
 755   }
 756   else
 757   {
 758       fprintf(header, "struct %s\n", iface->name);
 759       fprintf(header, "{\n");
 760       fprintf(header, "    BEGIN_INTERFACE\n");
 761       fprintf(header, "\n");
 762       indentation++;
 763       write_cpp_method_def(iface);
 764       indentation--;
 765       fprintf(header, "    END_INTERFACE\n");
 766       fprintf(header, "};\n");
 767   }
 768   fprintf(header, "#else\n");
 769   /* C interface */
 770   fprintf(header, "typedef struct %sVtbl %sVtbl;\n", iface->name, iface->name);
 771   fprintf(header, "struct %s {\n", iface->name);
 772   fprintf(header, "    const %sVtbl* lpVtbl;\n", iface->name);
 773   fprintf(header, "};\n");
 774   fprintf(header, "struct %sVtbl {\n", iface->name);
 775   indentation++;
 776   fprintf(header, "    BEGIN_INTERFACE\n");
 777   fprintf(header, "\n");
 778   write_c_method_def(iface);
 779   indentation--;
 780   fprintf(header, "    END_INTERFACE\n");
 781   fprintf(header, "};\n");
 782   fprintf(header, "\n");
 783   fprintf(header, "#ifdef COBJMACROS\n");
 784   write_method_macro(iface, iface->name);
 785   fprintf(header, "#endif\n");
 786   fprintf(header, "\n");
 787   fprintf(header, "#endif\n");
 788   fprintf(header, "\n");
 789   if (compat_icom) {
 790       fprintf(header, "#define %s_METHODS", iface->name);
 791       write_icom_method_def(iface);
 792       fprintf(header, "\n\n");
 793   }
 794   write_method_proto(iface);
 795   fprintf(header,"\n#endif  /* __%s_INTERFACE_DEFINED__ */\n\n", iface->name);
 796 }
 797
 798 void write_rpc_interface(type_t *iface)
 799 {
 800   unsigned long ver = get_attrv(iface->attrs, ATTR_VERSION);
 801
 802   if (!iface->funcs) return;
 803
 804   fprintf(header, "/*****************************************************************************\n");
 805   fprintf(header, " * %s interface (v%d.%d)\n", iface->name, LOWORD(ver), HIWORD(ver));
 806   fprintf(header, " */\n");
 807   write_guid(iface);
 808   fprintf(header, "extern RPC_IF_HANDLE %s_v%d_%d_c_ifspec;\n", iface->name, LOWORD(ver), HIWORD(ver));
 809   fprintf(header, "extern RPC_IF_HANDLE %s_v%d_%d_s_ifspec;\n", iface->name, LOWORD(ver), HIWORD(ver));
 810   write_function_proto(iface);
 811   fprintf(header, "\n");
 812
 813   /* FIXME: server/client code */
 814 }
 815
 816 void write_interface(type_t *iface)
 817 {
 818   if (is_object(iface->attrs))
 819     write_com_interface(iface);
 820   else
 821     write_rpc_interface(iface);
 822 }