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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdarg.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #ifdef HAVE_UNISTD_H
  27 # include <unistd.h>
  28 #endif
  29 #include <string.h>
  30 #include <ctype.h>
  31
  32 #include "widl.h"
  33 #include "utils.h"
  34 #include "parser.h"
  35 #include "header.h"
  36 #include "expr.h"
  37
  38 typedef struct _user_type_t generic_handle_t;
  39
  40 static int indentation = 0;
  41 user_type_list_t user_type_list = LIST_INIT(user_type_list);
  42 static context_handle_list_t context_handle_list = LIST_INIT(context_handle_list);
  43 static struct list generic_handle_list = LIST_INIT(generic_handle_list);
  44
  45 static void indent(FILE *h, int delta)
  46 {
  47   int c;
  48   if (delta < 0) indentation += delta;
  49   for (c=0; c<indentation; c++) fprintf(h, "    ");
  50   if (delta > 0) indentation += delta;
  51 }
  52
  53 int is_ptrchain_attr(const var_t *var, enum attr_type t)
  54 {
  55     if (is_attr(var->attrs, t))
  56         return 1;
  57     else
  58     {
  59         type_t *type = var->type;
  60         for (;;)
  61         {
  62             if (is_attr(type->attrs, t))
  63                 return 1;
  64             else if (type->kind == TKIND_ALIAS)
  65                 type = type->orig;
  66             else if (is_ptr(type))
  67                 type = type->ref;
  68             else return 0;
  69         }
  70     }
  71 }
  72
  73 int is_aliaschain_attr(const type_t *type, enum attr_type attr)
  74 {
  75     const type_t *t = type;
  76     for (;;)
  77     {
  78         if (is_attr(t->attrs, attr))
  79             return 1;
  80         else if (t->kind == TKIND_ALIAS)
  81             t = t->orig;
  82         else return 0;
  83     }
  84 }
  85
  86 int is_attr(const attr_list_t *list, enum attr_type t)
  87 {
  88     const attr_t *attr;
  89     if (list) LIST_FOR_EACH_ENTRY( attr, list, const attr_t, entry )
  90         if (attr->type == t) return 1;
  91     return 0;
  92 }
  93
  94 void *get_attrp(const attr_list_t *list, enum attr_type t)
  95 {
  96     const attr_t *attr;
  97     if (list) LIST_FOR_EACH_ENTRY( attr, list, const attr_t, entry )
  98         if (attr->type == t) return attr->u.pval;
  99     return NULL;
 100 }
 101
 102 unsigned long get_attrv(const attr_list_t *list, enum attr_type t)
 103 {
 104     const attr_t *attr;
 105     if (list) LIST_FOR_EACH_ENTRY( attr, list, const attr_t, entry )
 106         if (attr->type == t) return attr->u.ival;
 107     return 0;
 108 }
 109
 110 int is_void(const type_t *t)
 111 {
 112   if (!t->type && !t->ref) return 1;
 113   return 0;
 114 }
 115
 116 int is_conformant_array(const type_t *t)
 117 {
 118     return t->type == RPC_FC_CARRAY
 119         || t->type == RPC_FC_CVARRAY
 120         || (t->type == RPC_FC_BOGUS_ARRAY && t->size_is);
 121 }
 122
 123 void write_guid(FILE *f, const char *guid_prefix, const char *name, const UUID *uuid)
 124 {
 125   if (!uuid) return;
 126   fprintf(f, "DEFINE_GUID(%s_%s, 0x%08x, 0x%04x, 0x%04x, 0x%02x,0x%02x, 0x%02x,"
 127         "0x%02x,0x%02x,0x%02x,0x%02x,0x%02x);\n",
 128         guid_prefix, name, uuid->Data1, uuid->Data2, uuid->Data3, uuid->Data4[0],
 129         uuid->Data4[1], uuid->Data4[2], uuid->Data4[3], uuid->Data4[4], uuid->Data4[5],
 130         uuid->Data4[6], uuid->Data4[7]);
 131 }
 132
 133 const char *get_name(const var_t *v)
 134 {
 135     static char buffer[256];
 136
 137     if (is_attr( v->attrs, ATTR_PROPGET ))
 138         strcpy( buffer, "get_" );
 139     else if (is_attr( v->attrs, ATTR_PROPPUT ))
 140         strcpy( buffer, "put_" );
 141     else if (is_attr( v->attrs, ATTR_PROPPUTREF ))
 142         strcpy( buffer, "putref_" );
 143     else
 144         buffer[0] = 0;
 145     strcat( buffer, v->name );
 146     return buffer;
 147 }
 148
 149 static void write_field(FILE *h, var_t *v)
 150 {
 151   if (!v) return;
 152   if (v->type) {
 153     const char *name = v->name;
 154     if (name == NULL) {
 155       switch (v->type->type) {
 156       case RPC_FC_STRUCT:
 157       case RPC_FC_CVSTRUCT:
 158       case RPC_FC_CPSTRUCT:
 159       case RPC_FC_CSTRUCT:
 160       case RPC_FC_PSTRUCT:
 161       case RPC_FC_BOGUS_STRUCT:
 162       case RPC_FC_ENCAPSULATED_UNION:
 163         name = "DUMMYSTRUCTNAME";
 164         break;
 165       case RPC_FC_NON_ENCAPSULATED_UNION:
 166         name = "DUMMYUNIONNAME";
 167         break;
 168       default:
 169         /* ? */
 170         break;
 171       }
 172     }
 173     indent(h, 0);
 174     write_type_def_or_decl(h, v->type, TRUE, "%s", name);
 175     fprintf(h, ";\n");
 176   }
 177 }
 178
 179 static void write_fields(FILE *h, var_list_t *fields)
 180 {
 181     var_t *v;
 182     if (!fields) return;
 183     LIST_FOR_EACH_ENTRY( v, fields, var_t, entry ) write_field(h, v);
 184 }
 185
 186 static void write_enums(FILE *h, var_list_t *enums)
 187 {
 188   var_t *v;
 189   if (!enums) return;
 190   LIST_FOR_EACH_ENTRY( v, enums, var_t, entry )
 191   {
 192     if (v->name) {
 193       indent(h, 0);
 194       fprintf(h, "%s", get_name(v));
 195       if (v->eval) {
 196         fprintf(h, " = ");
 197         write_expr(h, v->eval, 0, 1, NULL, NULL);
 198       }
 199     }
 200     if (list_next( enums, &v->entry )) fprintf(h, ",\n");
 201   }
 202   fprintf(h, "\n");
 203 }
 204
 205 int needs_space_after(type_t *t)
 206 {
 207   return (t->kind == TKIND_ALIAS
 208           || (!is_ptr(t) && (!is_conformant_array(t) || t->declarray)));
 209 }
 210
 211 void write_type_left(FILE *h, type_t *t, int declonly)
 212 {
 213   if (!h) return;
 214
 215   if (is_attr(t->attrs, ATTR_CONST) &&
 216       (t->kind == TKIND_ALIAS || t->declarray || !is_ptr(t)))
 217     fprintf(h, "const ");
 218
 219   if (t->kind == TKIND_ALIAS) fprintf(h, "%s", t->name);
 220   else if (t->declarray) write_type_left(h, t->ref, declonly);
 221   else {
 222     if (t->sign > 0) fprintf(h, "signed ");
 223     else if (t->sign < 0) fprintf(h, "unsigned ");
 224     switch (t->type) {
 225       case RPC_FC_ENUM16:
 226       case RPC_FC_ENUM32:
 227         if (!declonly && t->defined && !t->written && !t->ignore) {
 228           if (t->name) fprintf(h, "enum %s {\n", t->name);
 229           else fprintf(h, "enum {\n");
 230           t->written = TRUE;
 231           indentation++;
 232           write_enums(h, t->fields_or_args);
 233           indent(h, -1);
 234           fprintf(h, "}");
 235         }
 236         else fprintf(h, "enum %s", t->name ? t->name : "");
 237         break;
 238       case RPC_FC_STRUCT:
 239       case RPC_FC_CVSTRUCT:
 240       case RPC_FC_CPSTRUCT:
 241       case RPC_FC_CSTRUCT:
 242       case RPC_FC_PSTRUCT:
 243       case RPC_FC_BOGUS_STRUCT:
 244       case RPC_FC_ENCAPSULATED_UNION:
 245         if (!declonly && t->defined && !t->written && !t->ignore) {
 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_or_args);
 251           indent(h, -1);
 252           fprintf(h, "}");
 253         }
 254         else fprintf(h, "struct %s", t->name ? t->name : "");
 255         break;
 256       case RPC_FC_NON_ENCAPSULATED_UNION:
 257         if (!declonly && t->defined && !t->written && !t->ignore) {
 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_or_args);
 263           indent(h, -1);
 264           fprintf(h, "}");
 265         }
 266         else fprintf(h, "union %s", t->name ? t->name : "");
 267         break;
 268       case RPC_FC_RP:
 269       case RPC_FC_UP:
 270       case RPC_FC_FP:
 271       case RPC_FC_OP:
 272       case RPC_FC_CARRAY:
 273       case RPC_FC_CVARRAY:
 274       case RPC_FC_BOGUS_ARRAY:
 275         write_type_left(h, t->ref, declonly);
 276         fprintf(h, "%s*", needs_space_after(t->ref) ? " " : "");
 277         if (is_ptr(t) && is_attr(t->attrs, ATTR_CONST)) fprintf(h, "const ");
 278         break;
 279       default:
 280         fprintf(h, "%s", t->name);
 281     }
 282   }
 283 }
 284
 285 void write_type_right(FILE *h, type_t *t, int is_field)
 286 {
 287   if (!h) return;
 288
 289   if (t->declarray) {
 290     if (is_conformant_array(t)) {
 291       fprintf(h, "[%s]", is_field ? "1" : "");
 292       t = t->ref;
 293     }
 294     for ( ; t->declarray; t = t->ref)
 295       fprintf(h, "[%lu]", t->dim);
 296   }
 297 }
 298
 299 void write_type_v(FILE *h, type_t *t, int is_field, int declonly,
 300                   const char *fmt, va_list args)
 301 {
 302   type_t *pt;
 303   int ptr_level = 0;
 304
 305   if (!h) return;
 306
 307   for (pt = t; is_ptr(pt); pt = pt->ref, ptr_level++)
 308     ;
 309
 310   if (pt->type == RPC_FC_FUNCTION) {
 311     int i;
 312     const char *callconv = get_attrp(pt->attrs, ATTR_CALLCONV);
 313     if (!callconv) callconv = "";
 314     if (is_attr(pt->attrs, ATTR_INLINE)) fprintf(h, "inline ");
 315     write_type_left(h, pt->ref, declonly);
 316     fputc(' ', h);
 317     if (ptr_level) fputc('(', h);
 318     fprintf(h, "%s ", callconv);
 319     for (i = 0; i < ptr_level; i++)
 320       fputc('*', h);
 321   } else
 322     write_type_left(h, t, declonly);
 323   if (fmt) {
 324     if (needs_space_after(t))
 325       fputc(' ', h);
 326     vfprintf(h, fmt, args);
 327   }
 328   if (pt->type == RPC_FC_FUNCTION) {
 329     if (ptr_level) fputc(')', h);
 330     fputc('(', h);
 331     write_args(h, pt->fields_or_args, NULL, 0, FALSE);
 332     fputc(')', h);
 333   } else
 334     write_type_right(h, t, is_field);
 335 }
 336
 337 void write_type_def_or_decl(FILE *f, type_t *t, int field, const char *fmt, ...)
 338 {
 339   va_list args;
 340   va_start(args, fmt);
 341   write_type_v(f, t, field, FALSE, fmt, args);
 342   va_end(args);
 343 }
 344
 345 void write_type_decl(FILE *f, type_t *t, const char *fmt, ...)
 346 {
 347   va_list args;
 348   va_start(args, fmt);
 349   write_type_v(f, t, FALSE, TRUE, fmt, args);
 350   va_end(args);
 351 }
 352
 353 void write_type_decl_left(FILE *f, type_t *t)
 354 {
 355   write_type_left(f, t, TRUE);
 356 }
 357
 358 static int user_type_registered(const char *name)
 359 {
 360   user_type_t *ut;
 361   LIST_FOR_EACH_ENTRY(ut, &user_type_list, user_type_t, entry)
 362     if (!strcmp(name, ut->name))
 363       return 1;
 364   return 0;
 365 }
 366
 367 static int context_handle_registered(const char *name)
 368 {
 369   context_handle_t *ch;
 370   LIST_FOR_EACH_ENTRY(ch, &context_handle_list, context_handle_t, entry)
 371     if (!strcmp(name, ch->name))
 372       return 1;
 373   return 0;
 374 }
 375
 376 static int generic_handle_registered(const char *name)
 377 {
 378   generic_handle_t *gh;
 379   LIST_FOR_EACH_ENTRY(gh, &generic_handle_list, generic_handle_t, entry)
 380     if (!strcmp(name, gh->name))
 381       return 1;
 382   return 0;
 383 }
 384
 385 /* check for types which require additional prototypes to be generated in the
 386  * header */
 387 void check_for_additional_prototype_types(const var_list_t *list)
 388 {
 389   const var_t *v;
 390
 391   if (!list) return;
 392   LIST_FOR_EACH_ENTRY( v, list, const var_t, entry )
 393   {
 394     type_t *type;
 395     for (type = v->type; type; type = type->kind == TKIND_ALIAS ? type->orig : type->ref) {
 396       const char *name = type->name;
 397       if (type->user_types_registered) continue;
 398       type->user_types_registered = 1;
 399       if (is_attr(type->attrs, ATTR_CONTEXTHANDLE)) {
 400         if (!context_handle_registered(name))
 401         {
 402           context_handle_t *ch = xmalloc(sizeof(*ch));
 403           ch->name = xstrdup(name);
 404           list_add_tail(&context_handle_list, &ch->entry);
 405         }
 406         /* don't carry on parsing fields within this type */
 407         break;
 408       }
 409       if (type->type != RPC_FC_BIND_PRIMITIVE && is_attr(type->attrs, ATTR_HANDLE)) {
 410         if (!generic_handle_registered(name))
 411         {
 412           generic_handle_t *gh = xmalloc(sizeof(*gh));
 413           gh->name = xstrdup(name);
 414           list_add_tail(&generic_handle_list, &gh->entry);
 415         }
 416         /* don't carry on parsing fields within this type */
 417         break;
 418       }
 419       if (is_attr(type->attrs, ATTR_WIREMARSHAL)) {
 420         if (!user_type_registered(name))
 421         {
 422           user_type_t *ut = xmalloc(sizeof *ut);
 423           ut->name = xstrdup(name);
 424           list_add_tail(&user_type_list, &ut->entry);
 425         }
 426         /* don't carry on parsing fields within this type as we are already
 427          * using a wire marshaled type */
 428         break;
 429       }
 430       else
 431       {
 432         check_for_additional_prototype_types(type->fields_or_args);
 433       }
 434     }
 435   }
 436 }
 437
 438 void write_user_types(void)
 439 {
 440   user_type_t *ut;
 441   LIST_FOR_EACH_ENTRY(ut, &user_type_list, user_type_t, entry)
 442   {
 443     const char *name = ut->name;
 444     fprintf(header, "ULONG           __RPC_USER %s_UserSize     (ULONG *, ULONG, %s *);\n", name, name);
 445     fprintf(header, "unsigned char * __RPC_USER %s_UserMarshal  (ULONG *, unsigned char *, %s *);\n", name, name);
 446     fprintf(header, "unsigned char * __RPC_USER %s_UserUnmarshal(ULONG *, unsigned char *, %s *);\n", name, name);
 447     fprintf(header, "void            __RPC_USER %s_UserFree     (ULONG *, %s *);\n", name, name);
 448   }
 449 }
 450
 451 void write_context_handle_rundowns(void)
 452 {
 453   context_handle_t *ch;
 454   LIST_FOR_EACH_ENTRY(ch, &context_handle_list, context_handle_t, entry)
 455   {
 456     const char *name = ch->name;
 457     fprintf(header, "void __RPC_USER %s_rundown(%s);\n", name, name);
 458   }
 459 }
 460
 461 void write_generic_handle_routines(void)
 462 {
 463   generic_handle_t *gh;
 464   LIST_FOR_EACH_ENTRY(gh, &generic_handle_list, generic_handle_t, entry)
 465   {
 466     const char *name = gh->name;
 467     fprintf(header, "handle_t __RPC_USER %s_bind(%s);\n", name, name);
 468     fprintf(header, "void __RPC_USER %s_unbind(%s, handle_t);\n", name, name);
 469   }
 470 }
 471
 472 void write_typedef(type_t *type)
 473 {
 474   fprintf(header, "typedef ");
 475   write_type_def_or_decl(header, type->orig, FALSE, "%s", type->name);
 476   fprintf(header, ";\n");
 477 }
 478
 479 int is_const_decl(const var_t *var)
 480 {
 481   const type_t *t;
 482   /* strangely, MIDL accepts a const attribute on any pointer in the
 483   * declaration to mean that data isn't being instantiated. this appears
 484   * to be a bug, but there is no benefit to being incompatible with MIDL,
 485   * so we'll do the same thing */
 486   for (t = var->type; ; )
 487   {
 488     if (is_attr(t->attrs, ATTR_CONST))
 489       return TRUE;
 490     else if (is_ptr(t))
 491       t = t->ref;
 492     else break;
 493   }
 494   return FALSE;
 495 }
 496
 497 void write_declaration(const var_t *v, int is_in_interface)
 498 {
 499   if (is_const_decl(v) && v->eval)
 500   {
 501     fprintf(header, "#define %s (", v->name);
 502     write_expr(header, v->eval, 0, 1, NULL, NULL);
 503     fprintf(header, ")\n\n");
 504   }
 505   else if (v->type->type != RPC_FC_FUNCTION || !is_in_interface)
 506   {
 507     switch (v->stgclass)
 508     {
 509       case STG_NONE:
 510       case STG_REGISTER: /* ignored */
 511         break;
 512       case STG_STATIC:
 513         fprintf(header, "static ");
 514         break;
 515       case STG_EXTERN:
 516         fprintf(header, "extern ");
 517         break;
 518     }
 519     write_type_def_or_decl(header, v->type, FALSE, "%s", v->name);
 520     fprintf(header, ";\n\n");
 521   }
 522 }
 523
 524 void write_library(const typelib_t *typelib)
 525 {
 526   const UUID *uuid = get_attrp(typelib->attrs, ATTR_UUID);
 527   fprintf(header, "\n");
 528   write_guid(header, "LIBID", typelib->name, uuid);
 529   fprintf(header, "\n");
 530 }
 531
 532
 533 const var_t* get_explicit_handle_var(const func_t* func)
 534 {
 535     const var_t* var;
 536
 537     if (!func->args)
 538         return NULL;
 539
 540     LIST_FOR_EACH_ENTRY( var, func->args, const var_t, entry )
 541         if (var->type->type == RPC_FC_BIND_PRIMITIVE)
 542             return var;
 543
 544     return NULL;
 545 }
 546
 547 const type_t* get_explicit_generic_handle_type(const var_t* var)
 548 {
 549     const type_t *t;
 550     for (t = var->type; is_ptr(t); t = t->ref)
 551         if (t->type != RPC_FC_BIND_PRIMITIVE && is_attr(t->attrs, ATTR_HANDLE))
 552             return t;
 553     return NULL;
 554 }
 555
 556 const var_t* get_explicit_generic_handle_var(const func_t* func)
 557 {
 558     const var_t* var;
 559
 560     if (!func->args)
 561         return NULL;
 562
 563     LIST_FOR_EACH_ENTRY( var, func->args, const var_t, entry )
 564         if (get_explicit_generic_handle_type(var))
 565             return var;
 566
 567     return NULL;
 568 }
 569
 570 const var_t* get_context_handle_var(const func_t* func)
 571 {
 572     const var_t* var;
 573
 574     if (!func->args)
 575         return NULL;
 576
 577     LIST_FOR_EACH_ENTRY( var, func->args, const var_t, entry )
 578         if (is_attr(var->attrs, ATTR_IN) && is_context_handle(var->type))
 579             return var;
 580
 581     return NULL;
 582 }
 583
 584 int has_out_arg_or_return(const func_t *func)
 585 {
 586     const var_t *var;
 587
 588     if (!is_void(get_func_return_type(func)))
 589         return 1;
 590
 591     if (!func->args)
 592         return 0;
 593
 594     LIST_FOR_EACH_ENTRY( var, func->args, const var_t, entry )
 595         if (is_attr(var->attrs, ATTR_OUT))
 596             return 1;
 597
 598     return 0;
 599 }
 600
 601
 602 /********** INTERFACES **********/
 603
 604 int is_object(const attr_list_t *list)
 605 {
 606     const attr_t *attr;
 607     if (list) LIST_FOR_EACH_ENTRY( attr, list, const attr_t, entry )
 608         if (attr->type == ATTR_OBJECT || attr->type == ATTR_ODL) return 1;
 609     return 0;
 610 }
 611
 612 int is_local(const attr_list_t *a)
 613 {
 614   return is_attr(a, ATTR_LOCAL);
 615 }
 616
 617 const var_t *is_callas(const attr_list_t *a)
 618 {
 619   return get_attrp(a, ATTR_CALLAS);
 620 }
 621
 622 static void write_method_macro(FILE *header, const type_t *iface, const char *name)
 623 {
 624   const func_t *cur;
 625
 626   if (iface->ref) write_method_macro(header, iface->ref, name);
 627
 628   if (!iface->funcs) return;
 629
 630   fprintf(header, "/*** %s methods ***/\n", iface->name);
 631   LIST_FOR_EACH_ENTRY( cur, iface->funcs, const func_t, entry )
 632   {
 633     var_t *def = cur->def;
 634     if (!is_callas(def->attrs)) {
 635       const var_t *arg;
 636
 637       fprintf(header, "#define %s_%s(This", name, get_name(def));
 638       if (cur->args)
 639           LIST_FOR_EACH_ENTRY( arg, cur->args, const var_t, entry )
 640               fprintf(header, ",%s", arg->name);
 641       fprintf(header, ") ");
 642
 643       fprintf(header, "(This)->lpVtbl->%s(This", get_name(def));
 644       if (cur->args)
 645           LIST_FOR_EACH_ENTRY( arg, cur->args, const var_t, entry )
 646               fprintf(header, ",%s", arg->name);
 647       fprintf(header, ")\n");
 648     }
 649   }
 650 }
 651
 652 void write_args(FILE *h, const var_list_t *args, const char *name, int method, int do_indent)
 653 {
 654   const var_t *arg;
 655   int count = 0;
 656
 657   if (do_indent)
 658   {
 659       indentation++;
 660       indent(h, 0);
 661   }
 662   if (method == 1) {
 663     fprintf(h, "%s* This", name);
 664     count++;
 665   }
 666   if (args) LIST_FOR_EACH_ENTRY( arg, args, const var_t, entry ) {
 667     if (count) {
 668         if (do_indent)
 669         {
 670             fprintf(h, ",\n");
 671             indent(h, 0);
 672         }
 673         else fprintf(h, ",");
 674     }
 675     write_type_decl(h, arg->type, "%s", arg->name);
 676     count++;
 677   }
 678   if (do_indent) indentation--;
 679 }
 680
 681 static void write_cpp_method_def(FILE *header, const type_t *iface)
 682 {
 683   const func_t *cur;
 684
 685   if (!iface->funcs) return;
 686
 687   LIST_FOR_EACH_ENTRY( cur, iface->funcs, const func_t, entry )
 688   {
 689     var_t *def = cur->def;
 690     if (!is_callas(def->attrs)) {
 691       const char *callconv = get_attrp(def->type->attrs, ATTR_CALLCONV);
 692       if (!callconv) callconv = "";
 693       indent(header, 0);
 694       fprintf(header, "virtual ");
 695       write_type_decl_left(header, get_func_return_type(cur));
 696       fprintf(header, " %s %s(\n", callconv, get_name(def));
 697       write_args(header, cur->args, iface->name, 2, TRUE);
 698       fprintf(header, ") = 0;\n");
 699       fprintf(header, "\n");
 700     }
 701   }
 702 }
 703
 704 static void do_write_c_method_def(FILE *header, const type_t *iface, const char *name)
 705 {
 706   const func_t *cur;
 707
 708   if (iface->ref) do_write_c_method_def(header, iface->ref, name);
 709
 710   if (!iface->funcs) return;
 711   indent(header, 0);
 712   fprintf(header, "/*** %s methods ***/\n", iface->name);
 713   LIST_FOR_EACH_ENTRY( cur, iface->funcs, const func_t, entry )
 714   {
 715     const var_t *def = cur->def;
 716     if (!is_callas(def->attrs)) {
 717       const char *callconv = get_attrp(def->type->attrs, ATTR_CALLCONV);
 718       if (!callconv) callconv = "";
 719       indent(header, 0);
 720       write_type_decl_left(header, get_func_return_type(cur));
 721       fprintf(header, " (%s *%s)(\n", callconv, get_name(def));
 722       write_args(header, cur->args, name, 1, TRUE);
 723       fprintf(header, ");\n");
 724       fprintf(header, "\n");
 725     }
 726   }
 727 }
 728
 729 static void write_c_method_def(FILE *header, const type_t *iface)
 730 {
 731   do_write_c_method_def(header, iface, iface->name);
 732 }
 733
 734 static void write_c_disp_method_def(FILE *header, const type_t *iface)
 735 {
 736   do_write_c_method_def(header, iface->ref, iface->name);
 737 }
 738
 739 static void write_method_proto(FILE *header, const type_t *iface)
 740 {
 741   const func_t *cur;
 742
 743   if (!iface->funcs) return;
 744   LIST_FOR_EACH_ENTRY( cur, iface->funcs, const func_t, entry )
 745   {
 746     const var_t *def = cur->def;
 747
 748     if (!is_local(def->attrs)) {
 749       const char *callconv = get_attrp(def->type->attrs, ATTR_CALLCONV);
 750       if (!callconv) callconv = "";
 751       /* proxy prototype */
 752       write_type_decl_left(header, get_func_return_type(cur));
 753       fprintf(header, " %s %s_%s_Proxy(\n", callconv, iface->name, get_name(def));
 754       write_args(header, cur->args, iface->name, 1, TRUE);
 755       fprintf(header, ");\n");
 756       /* stub prototype */
 757       fprintf(header, "void __RPC_STUB %s_%s_Stub(\n", iface->name, get_name(def));
 758       fprintf(header, "    IRpcStubBuffer* This,\n");
 759       fprintf(header, "    IRpcChannelBuffer* pRpcChannelBuffer,\n");
 760       fprintf(header, "    PRPC_MESSAGE pRpcMessage,\n");
 761       fprintf(header, "    DWORD* pdwStubPhase);\n");
 762     }
 763   }
 764 }
 765
 766 void write_locals(FILE *fp, const type_t *iface, int body)
 767 {
 768   static const char comment[]
 769     = "/* WIDL-generated stub.  You must provide an implementation for this.  */";
 770   const func_list_t *funcs = iface->funcs;
 771   const func_t *cur;
 772
 773   if (!is_object(iface->attrs) || !funcs)
 774     return;
 775
 776   LIST_FOR_EACH_ENTRY(cur, funcs, const func_t, entry) {
 777     const var_t *def = cur->def;
 778     const var_t *cas = is_callas(def->attrs);
 779
 780     if (cas) {
 781       const func_t *m;
 782       LIST_FOR_EACH_ENTRY(m, iface->funcs, const func_t, entry)
 783         if (!strcmp(m->def->name, cas->name))
 784           break;
 785       if (&m->entry != iface->funcs) {
 786         const var_t *mdef = m->def;
 787         /* proxy prototype - use local prototype */
 788         write_type_decl_left(fp, get_func_return_type(m));
 789         fprintf(fp, " CALLBACK %s_%s_Proxy(\n", iface->name, get_name(mdef));
 790         write_args(fp, m->args, iface->name, 1, TRUE);
 791         fprintf(fp, ")");
 792         if (body) {
 793           type_t *rt = get_func_return_type(m);
 794           fprintf(fp, "\n{\n");
 795           fprintf(fp, "    %s\n", comment);
 796           if (rt->name && strcmp(rt->name, "HRESULT") == 0)
 797             fprintf(fp, "    return E_NOTIMPL;\n");
 798           else if (rt->type) {
 799             fprintf(fp, "    ");
 800             write_type_decl(fp, rt, "rv");
 801             fprintf(fp, ";\n");
 802             fprintf(fp, "    memset(&rv, 0, sizeof rv);\n");
 803             fprintf(fp, "    return rv;\n");
 804           }
 805           fprintf(fp, "}\n\n");
 806         }
 807         else
 808           fprintf(fp, ";\n");
 809         /* stub prototype - use remotable prototype */
 810         write_type_decl_left(fp, get_func_return_type(cur));
 811         fprintf(fp, " __RPC_STUB %s_%s_Stub(\n", iface->name, get_name(mdef));
 812         write_args(fp, cur->args, iface->name, 1, TRUE);
 813         fprintf(fp, ")");
 814         if (body)
 815           /* Remotable methods must all return HRESULTs.  */
 816           fprintf(fp, "\n{\n    %s\n    return E_NOTIMPL;\n}\n\n", comment);
 817         else
 818           fprintf(fp, ";\n");
 819       }
 820       else
 821         error_loc("invalid call_as attribute (%s -> %s)\n", def->name, cas->name);
 822     }
 823   }
 824 }
 825
 826 static void write_function_proto(FILE *header, const type_t *iface, const func_t *fun, const char *prefix)
 827 {
 828   var_t *def = fun->def;
 829   const char *callconv = get_attrp(def->type->attrs, ATTR_CALLCONV);
 830
 831   /* FIXME: do we need to handle call_as? */
 832   write_type_decl_left(header, get_func_return_type(fun));
 833   fprintf(header, " ");
 834   if (callconv) fprintf(header, "%s ", callconv);
 835   fprintf(header, "%s%s(\n", prefix, get_name(def));
 836   if (fun->args)
 837     write_args(header, fun->args, iface->name, 0, TRUE);
 838   else
 839     fprintf(header, "    void");
 840   fprintf(header, ");\n\n");
 841 }
 842
 843 static void write_function_protos(FILE *header, const type_t *iface)
 844 {
 845   const func_t *cur;
 846   int prefixes_differ = strcmp(prefix_client, prefix_server);
 847
 848   if (!iface->funcs) return;
 849   LIST_FOR_EACH_ENTRY( cur, iface->funcs, const func_t, entry )
 850   {
 851     if (prefixes_differ) {
 852       fprintf(header, "/* client prototype */\n");
 853       write_function_proto(header, iface, cur, prefix_client);
 854       fprintf(header, "/* server prototype */\n");
 855     }
 856     write_function_proto(header, iface, cur, prefix_server);
 857   }
 858 }
 859
 860 void write_forward(type_t *iface)
 861 {
 862   /* C/C++ forwards should only be written for object interfaces, so if we
 863    * have a full definition we only write one if we find [object] among the
 864    * attributes - however, if we don't have a full definition at this point
 865    * (i.e. this is an IDL forward), then we also assume that it is an object
 866    * interface, since non-object interfaces shouldn't need forwards */
 867   if ((!iface->defined || is_object(iface->attrs) || is_attr(iface->attrs, ATTR_DISPINTERFACE))
 868         && !iface->written) {
 869     fprintf(header, "#ifndef __%s_FWD_DEFINED__\n", iface->name);
 870     fprintf(header, "#define __%s_FWD_DEFINED__\n", iface->name);
 871     fprintf(header, "typedef interface %s %s;\n", iface->name, iface->name);
 872     fprintf(header, "#endif\n\n" );
 873     iface->written = TRUE;
 874   }
 875 }
 876
 877 static void write_iface_guid(FILE *header, const type_t *iface)
 878 {
 879   const UUID *uuid = get_attrp(iface->attrs, ATTR_UUID);
 880   write_guid(header, "IID", iface->name, uuid);
 881 }
 882
 883 static void write_dispiface_guid(FILE *header, const type_t *iface)
 884 {
 885   const UUID *uuid = get_attrp(iface->attrs, ATTR_UUID);
 886   write_guid(header, "DIID", iface->name, uuid);
 887 }
 888
 889 static void write_coclass_guid(FILE *header, const type_t *cocl)
 890 {
 891   const UUID *uuid = get_attrp(cocl->attrs, ATTR_UUID);
 892   write_guid(header, "CLSID", cocl->name, uuid);
 893 }
 894
 895 static void write_com_interface_start(FILE *header, const type_t *iface)
 896 {
 897   int dispinterface = is_attr(iface->attrs, ATTR_DISPINTERFACE);
 898   fprintf(header, "/*****************************************************************************\n");
 899   fprintf(header, " * %s %sinterface\n", iface->name, dispinterface ? "disp" : "");
 900   fprintf(header, " */\n");
 901   fprintf(header,"#ifndef __%s_%sINTERFACE_DEFINED__\n", iface->name, dispinterface ? "DISP" : "");
 902   fprintf(header,"#define __%s_%sINTERFACE_DEFINED__\n\n", iface->name, dispinterface ? "DISP" : "");
 903 }
 904
 905 static void write_com_interface_end(FILE *header, type_t *iface)
 906 {
 907   int dispinterface = is_attr(iface->attrs, ATTR_DISPINTERFACE);
 908   if (dispinterface)
 909     write_dispiface_guid(header, iface);
 910   else
 911     write_iface_guid(header, iface);
 912   /* C++ interface */
 913   fprintf(header, "#if defined(__cplusplus) && !defined(CINTERFACE)\n");
 914   if (iface->ref)
 915   {
 916     fprintf(header, "interface %s : public %s\n", iface->name, iface->ref->name);
 917     fprintf(header, "{\n");
 918   }
 919   else
 920   {
 921     fprintf(header, "interface %s\n", iface->name);
 922     fprintf(header, "{\n");
 923     fprintf(header, "    BEGIN_INTERFACE\n");
 924     fprintf(header, "\n");
 925   }
 926   /* dispinterfaces don't have real functions, so don't write C++ functions for
 927    * them */
 928   if (!dispinterface)
 929   {
 930     indentation++;
 931     write_cpp_method_def(header, iface);
 932     indentation--;
 933   }
 934   if (!iface->ref)
 935     fprintf(header, "    END_INTERFACE\n");
 936   fprintf(header, "};\n");
 937   fprintf(header, "#else\n");
 938   /* C interface */
 939   fprintf(header, "typedef struct %sVtbl {\n", iface->name);
 940   indentation++;
 941   fprintf(header, "    BEGIN_INTERFACE\n");
 942   fprintf(header, "\n");
 943   if (dispinterface)
 944     write_c_disp_method_def(header, iface);
 945   else
 946     write_c_method_def(header, iface);
 947   indentation--;
 948   fprintf(header, "    END_INTERFACE\n");
 949   fprintf(header, "} %sVtbl;\n", iface->name);
 950   fprintf(header, "interface %s {\n", iface->name);
 951   fprintf(header, "    CONST_VTBL %sVtbl* lpVtbl;\n", iface->name);
 952   fprintf(header, "};\n");
 953   fprintf(header, "\n");
 954   fprintf(header, "#ifdef COBJMACROS\n");
 955   /* dispinterfaces don't have real functions, so don't write macros for them,
 956    * only for the interface this interface inherits from, i.e. IDispatch */
 957   write_method_macro(header, dispinterface ? iface->ref : iface, iface->name);
 958   fprintf(header, "#endif\n");
 959   fprintf(header, "\n");
 960   fprintf(header, "#endif\n");
 961   fprintf(header, "\n");
 962   /* dispinterfaces don't have real functions, so don't write prototypes for
 963    * them */
 964   if (!dispinterface)
 965   {
 966     write_method_proto(header, iface);
 967     write_locals(header, iface, FALSE);
 968     fprintf(header, "\n");
 969   }
 970   fprintf(header,"#endif  /* __%s_%sINTERFACE_DEFINED__ */\n\n", iface->name, dispinterface ? "DISP" : "");
 971 }
 972
 973 static void write_rpc_interface_start(FILE *header, const type_t *iface)
 974 {
 975   unsigned int ver = get_attrv(iface->attrs, ATTR_VERSION);
 976   const char *var = get_attrp(iface->attrs, ATTR_IMPLICIT_HANDLE);
 977   static int allocate_written = 0;
 978
 979   if (!allocate_written)
 980   {
 981     allocate_written = 1;
 982     fprintf(header, "void * __RPC_USER MIDL_user_allocate(size_t);\n");
 983     fprintf(header, "void __RPC_USER MIDL_user_free(void *);\n\n");
 984   }
 985
 986   fprintf(header, "/*****************************************************************************\n");
 987   fprintf(header, " * %s interface (v%d.%d)\n", iface->name, MAJORVERSION(ver), MINORVERSION(ver));
 988   fprintf(header, " */\n");
 989   fprintf(header,"#ifndef __%s_INTERFACE_DEFINED__\n", iface->name);
 990   fprintf(header,"#define __%s_INTERFACE_DEFINED__\n\n", iface->name);
 991   if (var) fprintf(header, "extern handle_t %s;\n", var);
 992   if (old_names)
 993   {
 994       fprintf(header, "extern RPC_IF_HANDLE %s%s_ClientIfHandle;\n", prefix_client, iface->name);
 995       fprintf(header, "extern RPC_IF_HANDLE %s%s_ServerIfHandle;\n", prefix_server, iface->name);
 996   }
 997   else
 998   {
 999       fprintf(header, "extern RPC_IF_HANDLE %s%s_v%d_%d_c_ifspec;\n",
1000               prefix_client, iface->name, MAJORVERSION(ver), MINORVERSION(ver));
1001       fprintf(header, "extern RPC_IF_HANDLE %s%s_v%d_%d_s_ifspec;\n",
1002               prefix_server, iface->name, MAJORVERSION(ver), MINORVERSION(ver));
1003   }
1004 }
1005
1006 static void write_rpc_interface_end(FILE *header, const type_t *iface)
1007 {
1008   fprintf(header,"\n#endif  /* __%s_INTERFACE_DEFINED__ */\n\n", iface->name);
1009 }
1010
1011 void write_interface(type_t *iface)
1012 {
1013   if (is_attr(iface->attrs, ATTR_DISPINTERFACE) || is_object(iface->attrs))
1014   {
1015     write_com_interface_start(header, iface);
1016     write_com_interface_end(header, iface);
1017   }
1018   else
1019   {
1020     write_rpc_interface_start(header, iface);
1021     write_function_protos(header, iface);
1022     write_rpc_interface_end(header, iface);
1023   }
1024 }
1025
1026 void write_coclass(type_t *cocl)
1027 {
1028   fprintf(header, "/*****************************************************************************\n");
1029   fprintf(header, " * %s coclass\n", cocl->name);
1030   fprintf(header, " */\n\n");
1031   write_coclass_guid(header, cocl);
1032   fprintf(header, "\n");
1033 }
1034
1035 void write_coclass_forward(type_t *cocl)
1036 {
1037   fprintf(header, "#ifndef __%s_FWD_DEFINED__\n", cocl->name);
1038   fprintf(header, "#define __%s_FWD_DEFINED__\n", cocl->name);
1039   fprintf(header, "typedef struct %s %s;\n", cocl->name, cocl->name);
1040   fprintf(header, "#endif /* defined __%s_FWD_DEFINED__ */\n\n", cocl->name );
1041 }
1042
1043 void write_import(const char *fname)
1044 {
1045   char *hname, *p;
1046
1047   hname = dup_basename(fname, ".idl");
1048   p = hname + strlen(hname) - 2;
1049   if (p <= hname || strcmp( p, ".h" )) strcat(hname, ".h");
1050
1051   fprintf(header, "#include <%s>\n", hname);
1052   free(hname);
1053 }