dlls/jscript/dispex.c

   1 /*
   2  * Copyright 2008 Jacek Caban for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include <assert.h>
  20
  21 #include "jscript.h"
  22
  23 #include "wine/unicode.h"
  24 #include "wine/debug.h"
  25
  26 WINE_DEFAULT_DEBUG_CHANNEL(jscript);
  27
  28 /*
  29  * This IID is used to get jsdisp_t objecto from interface.
  30  * We might consider using private interface instead.
  31  */
  32 static const IID IID_IDispatchJS =
  33         {0x719c3050,0xf9d3,0x11cf,{0xa4,0x93,0x00,0x40,0x05,0x23,0xa8,0xa6}};
  34
  35 #define FDEX_VERSION_MASK 0xf0000000
  36 #define GOLDEN_RATIO 0x9E3779B9U
  37
  38 typedef enum {
  39     PROP_VARIANT,
  40     PROP_BUILTIN,
  41     PROP_PROTREF,
  42     PROP_DELETED
  43 } prop_type_t;
  44
  45 struct _dispex_prop_t {
  46     WCHAR *name;
  47     unsigned hash;
  48     prop_type_t type;
  49     DWORD flags;
  50
  51     union {
  52         VARIANT var;
  53         const builtin_prop_t *p;
  54         DWORD ref;
  55     } u;
  56
  57     int bucket_head;
  58     int bucket_next;
  59 };
  60
  61 static inline DISPID prop_to_id(jsdisp_t *This, dispex_prop_t *prop)
  62 {
  63     return prop - This->props;
  64 }
  65
  66 static inline dispex_prop_t *get_prop(jsdisp_t *This, DISPID id)
  67 {
  68     if(id < 0 || id >= This->prop_cnt || This->props[id].type == PROP_DELETED)
  69         return NULL;
  70
  71     return This->props+id;
  72 }
  73
  74 static DWORD get_flags(jsdisp_t *This, dispex_prop_t *prop)
  75 {
  76     if(prop->type == PROP_PROTREF) {
  77         dispex_prop_t *parent = get_prop(This->prototype, prop->u.ref);
  78         if(!parent) {
  79             prop->type = PROP_DELETED;
  80             return 0;
  81         }
  82
  83         return get_flags(This->prototype, parent);
  84     }
  85
  86     return prop->flags;
  87 }
  88
  89 static const builtin_prop_t *find_builtin_prop(jsdisp_t *This, const WCHAR *name)
  90 {
  91     int min = 0, max, i, r;
  92
  93     max = This->builtin_info->props_cnt-1;
  94     while(min <= max) {
  95         i = (min+max)/2;
  96
  97         r = strcmpW(name, This->builtin_info->props[i].name);
  98         if(!r)
  99             return This->builtin_info->props + i;
 100
 101         if(r < 0)
 102             max = i-1;
 103         else
 104             min = i+1;
 105     }
 106
 107     return NULL;
 108 }
 109
 110 static inline unsigned string_hash(const WCHAR *name)
 111 {
 112     unsigned h = 0;
 113     for(; *name; name++)
 114         h = (h>>(sizeof(unsigned)*8-4)) ^ (h<<4) ^ tolowerW(*name);
 115     return h;
 116 }
 117
 118 static inline unsigned get_props_idx(jsdisp_t *This, unsigned hash)
 119 {
 120     return (hash*GOLDEN_RATIO) & (This->buf_size-1);
 121 }
 122
 123 static inline HRESULT resize_props(jsdisp_t *This)
 124 {
 125     dispex_prop_t *props;
 126     int i, bucket;
 127
 128     if(This->buf_size != This->prop_cnt)
 129         return S_FALSE;
 130
 131     props = heap_realloc(This->props, sizeof(dispex_prop_t)*This->buf_size*2);
 132     if(!props)
 133         return E_OUTOFMEMORY;
 134     This->buf_size *= 2;
 135     This->props = props;
 136
 137     for(i=0; i<This->buf_size; i++) {
 138         This->props[i].bucket_head = 0;
 139         This->props[i].bucket_next = 0;
 140     }
 141
 142     for(i=1; i<This->prop_cnt; i++) {
 143         props = This->props+i;
 144
 145         bucket = get_props_idx(This, props->hash);
 146         props->bucket_next = This->props[bucket].bucket_head;
 147         This->props[bucket].bucket_head = i;
 148     }
 149
 150     return S_OK;
 151 }
 152
 153 static inline dispex_prop_t* alloc_prop(jsdisp_t *This, const WCHAR *name, prop_type_t type, DWORD flags)
 154 {
 155     dispex_prop_t *prop;
 156     unsigned bucket;
 157
 158     if(FAILED(resize_props(This)))
 159         return NULL;
 160
 161     prop = &This->props[This->prop_cnt];
 162     prop->name = heap_strdupW(name);
 163     if(!prop->name)
 164         return NULL;
 165     prop->type = type;
 166     prop->flags = flags;
 167     prop->hash = string_hash(name);
 168
 169     bucket = get_props_idx(This, prop->hash);
 170     prop->bucket_next = This->props[bucket].bucket_head;
 171     This->props[bucket].bucket_head = This->prop_cnt++;
 172     return prop;
 173 }
 174
 175 static dispex_prop_t *alloc_protref(jsdisp_t *This, const WCHAR *name, DWORD ref)
 176 {
 177     dispex_prop_t *ret;
 178
 179     ret = alloc_prop(This, name, PROP_PROTREF, 0);
 180     if(!ret)
 181         return NULL;
 182
 183     ret->u.ref = ref;
 184     return ret;
 185 }
 186
 187 static HRESULT find_prop_name(jsdisp_t *This, unsigned hash, const WCHAR *name, dispex_prop_t **ret)
 188 {
 189     const builtin_prop_t *builtin;
 190     unsigned bucket, pos, prev = 0;
 191     dispex_prop_t *prop;
 192
 193     bucket = get_props_idx(This, hash);
 194     pos = This->props[bucket].bucket_head;
 195     while(pos != 0) {
 196         if(!strcmpW(name, This->props[pos].name)) {
 197             if(prev != 0) {
 198                 This->props[prev].bucket_next = This->props[pos].bucket_next;
 199                 This->props[pos].bucket_next = This->props[bucket].bucket_head;
 200                 This->props[bucket].bucket_head = pos;
 201             }
 202
 203             *ret = &This->props[pos];
 204             return S_OK;
 205         }
 206
 207         prev = pos;
 208         pos = This->props[pos].bucket_next;
 209     }
 210
 211     builtin = find_builtin_prop(This, name);
 212     if(builtin) {
 213         prop = alloc_prop(This, name, PROP_BUILTIN, builtin->flags);
 214         if(!prop)
 215             return E_OUTOFMEMORY;
 216
 217         prop->u.p = builtin;
 218         *ret = prop;
 219         return S_OK;
 220     }
 221
 222     *ret = NULL;
 223     return S_OK;
 224 }
 225
 226 static HRESULT find_prop_name_prot(jsdisp_t *This, unsigned hash, const WCHAR *name, dispex_prop_t **ret)
 227 {
 228     dispex_prop_t *prop, *del=NULL;
 229     HRESULT hres;
 230
 231     hres = find_prop_name(This, hash, name, &prop);
 232     if(FAILED(hres))
 233         return hres;
 234     if(prop && prop->type==PROP_DELETED) {
 235         del = prop;
 236     } else if(prop) {
 237         *ret = prop;
 238         return S_OK;
 239     }
 240
 241     if(This->prototype) {
 242         hres = find_prop_name_prot(This->prototype, hash, name, &prop);
 243         if(FAILED(hres))
 244             return hres;
 245         if(prop) {
 246             if(del) {
 247                 del->type = PROP_PROTREF;
 248                 del->flags = 0;
 249                 del->u.ref = prop - This->prototype->props;
 250                 prop = del;
 251             }else {
 252                 prop = alloc_protref(This, prop->name, prop - This->prototype->props);
 253                 if(!prop)
 254                     return E_OUTOFMEMORY;
 255             }
 256
 257             *ret = prop;
 258             return S_OK;
 259         }
 260     }
 261
 262     *ret = del;
 263     return S_OK;
 264 }
 265
 266 static HRESULT ensure_prop_name(jsdisp_t *This, const WCHAR *name, BOOL search_prot, DWORD create_flags, dispex_prop_t **ret)
 267 {
 268     dispex_prop_t *prop;
 269     HRESULT hres;
 270
 271     if(search_prot)
 272         hres = find_prop_name_prot(This, string_hash(name), name, &prop);
 273     else
 274         hres = find_prop_name(This, string_hash(name), name, &prop);
 275     if(SUCCEEDED(hres) && (!prop || prop->type==PROP_DELETED)) {
 276         TRACE("creating prop %s\n", debugstr_w(name));
 277
 278         if(prop) {
 279             prop->type = PROP_VARIANT;
 280             prop->flags = create_flags;
 281         }else {
 282             prop = alloc_prop(This, name, PROP_VARIANT, create_flags);
 283             if(!prop)
 284                 return E_OUTOFMEMORY;
 285         }
 286
 287         VariantInit(&prop->u.var);
 288     }
 289
 290     *ret = prop;
 291     return hres;
 292 }
 293
 294 static HRESULT set_this(DISPPARAMS *dp, DISPPARAMS *olddp, IDispatch *jsthis)
 295 {
 296     VARIANTARG *oldargs;
 297     int i;
 298
 299     static DISPID this_id = DISPID_THIS;
 300
 301     *dp = *olddp;
 302
 303     for(i = 0; i < dp->cNamedArgs; i++) {
 304         if(dp->rgdispidNamedArgs[i] == DISPID_THIS)
 305             return S_OK;
 306     }
 307
 308     oldargs = dp->rgvarg;
 309     dp->rgvarg = heap_alloc((dp->cArgs+1) * sizeof(VARIANTARG));
 310     if(!dp->rgvarg)
 311         return E_OUTOFMEMORY;
 312     memcpy(dp->rgvarg+1, oldargs, dp->cArgs*sizeof(VARIANTARG));
 313     V_VT(dp->rgvarg) = VT_DISPATCH;
 314     V_DISPATCH(dp->rgvarg) = jsthis;
 315     dp->cArgs++;
 316
 317     if(dp->cNamedArgs) {
 318         DISPID *old = dp->rgdispidNamedArgs;
 319         dp->rgdispidNamedArgs = heap_alloc((dp->cNamedArgs+1)*sizeof(DISPID));
 320         if(!dp->rgdispidNamedArgs) {
 321             heap_free(dp->rgvarg);
 322             return E_OUTOFMEMORY;
 323         }
 324
 325         memcpy(dp->rgdispidNamedArgs+1, old, dp->cNamedArgs*sizeof(DISPID));
 326         dp->rgdispidNamedArgs[0] = DISPID_THIS;
 327         dp->cNamedArgs++;
 328     }else {
 329         dp->rgdispidNamedArgs = &this_id;
 330         dp->cNamedArgs = 1;
 331     }
 332
 333     return S_OK;
 334 }
 335
 336 static HRESULT convert_params(const DISPPARAMS *dp, VARIANT *buf, DISPPARAMS *ret)
 337 {
 338     BOOL need_conversion = FALSE;
 339     const VARIANT *s;
 340     VARIANT *d;
 341     unsigned i;
 342
 343     *ret = *dp;
 344
 345     for(i = 0; i < ret->cArgs && !need_conversion; i++) {
 346         switch(V_VT(get_arg(dp, i))) {
 347         case VT_I2:
 348         case VT_INT:
 349             need_conversion = TRUE;
 350             break;
 351         }
 352     }
 353
 354     if(!need_conversion)
 355         return S_OK;
 356
 357     if(ret->cArgs > 6) {
 358         ret->rgvarg = heap_alloc(ret->cArgs * sizeof(VARIANT));
 359         if(!ret->rgvarg)
 360             return E_OUTOFMEMORY;
 361     }else {
 362         ret->rgvarg = buf;
 363     }
 364
 365     for(i = 0; i < ret->cArgs; i++) {
 366         s = get_arg(dp, i);
 367         d = get_arg(ret, i);
 368         switch(V_VT(s)) {
 369         case VT_I2:
 370             V_VT(d) = VT_I4;
 371             V_I4(d) = V_I2(s);
 372             break;
 373         case VT_INT:
 374             V_VT(d) = VT_I4;
 375             V_I4(d) = V_INT(s);
 376             break;
 377         default:
 378             *d = *s;
 379         }
 380     }
 381
 382     return S_OK;
 383 }
 384
 385 static HRESULT invoke_prop_func(jsdisp_t *This, jsdisp_t *jsthis, dispex_prop_t *prop, WORD flags,
 386         DISPPARAMS *dp, VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
 387 {
 388     HRESULT hres;
 389
 390     switch(prop->type) {
 391     case PROP_BUILTIN: {
 392         DISPPARAMS params;
 393         VARIANT buf[6];
 394         vdisp_t vthis;
 395
 396         if(flags == DISPATCH_CONSTRUCT && (prop->flags & PROPF_METHOD)) {
 397             WARN("%s is not a constructor\n", debugstr_w(prop->name));
 398             return E_INVALIDARG;
 399         }
 400
 401         hres = convert_params(dp, buf, &params);
 402         if(FAILED(hres))
 403             return hres;
 404
 405         set_jsdisp(&vthis, jsthis);
 406         hres = prop->u.p->invoke(This->ctx, &vthis, flags, &params, retv, ei);
 407         vdisp_release(&vthis);
 408         if(params.rgvarg != buf && params.rgvarg != dp->rgvarg)
 409             heap_free(params.rgvarg);
 410         return hres;
 411     }
 412     case PROP_PROTREF:
 413         return invoke_prop_func(This->prototype, jsthis, This->prototype->props+prop->u.ref, flags, dp, retv, ei, caller);
 414     case PROP_VARIANT: {
 415         DISPPARAMS new_dp;
 416
 417         if(V_VT(&prop->u.var) != VT_DISPATCH) {
 418             FIXME("invoke vt %d\n", V_VT(&prop->u.var));
 419             return E_FAIL;
 420         }
 421
 422         TRACE("call %s %p\n", debugstr_w(prop->name), V_DISPATCH(&prop->u.var));
 423
 424         hres = set_this(&new_dp, dp, to_disp(jsthis));
 425         if(FAILED(hres))
 426             return hres;
 427
 428         hres = disp_call(This->ctx, V_DISPATCH(&prop->u.var), DISPID_VALUE, flags, &new_dp, retv, ei);
 429
 430         if(new_dp.rgvarg != dp->rgvarg) {
 431             heap_free(new_dp.rgvarg);
 432             if(new_dp.cNamedArgs > 1)
 433                 heap_free(new_dp.rgdispidNamedArgs);
 434         }
 435
 436         return hres;
 437     }
 438     default:
 439         ERR("type %d\n", prop->type);
 440     }
 441
 442     return E_FAIL;
 443 }
 444
 445 static HRESULT prop_get(jsdisp_t *This, dispex_prop_t *prop, DISPPARAMS *dp,
 446         VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
 447 {
 448     HRESULT hres;
 449
 450     switch(prop->type) {
 451     case PROP_BUILTIN:
 452         if(prop->u.p->flags & PROPF_METHOD) {
 453             jsdisp_t *obj;
 454             hres = create_builtin_function(This->ctx, prop->u.p->invoke, prop->u.p->name, NULL,
 455                     prop->u.p->flags, NULL, &obj);
 456             if(FAILED(hres))
 457                 break;
 458
 459             prop->type = PROP_VARIANT;
 460             var_set_jsdisp(&prop->u.var, obj);
 461             hres = VariantCopy(retv, &prop->u.var);
 462         }else {
 463             vdisp_t vthis;
 464
 465             set_jsdisp(&vthis, This);
 466             hres = prop->u.p->invoke(This->ctx, &vthis, DISPATCH_PROPERTYGET, dp, retv, ei);
 467             vdisp_release(&vthis);
 468         }
 469         break;
 470     case PROP_PROTREF:
 471         hres = prop_get(This->prototype, This->prototype->props+prop->u.ref, dp, retv, ei, caller);
 472         break;
 473     case PROP_VARIANT:
 474         hres = VariantCopy(retv, &prop->u.var);
 475         break;
 476     default:
 477         ERR("type %d\n", prop->type);
 478         return E_FAIL;
 479     }
 480
 481     if(FAILED(hres)) {
 482         TRACE("fail %08x\n", hres);
 483         return hres;
 484     }
 485
 486     TRACE("%s ret %s\n", debugstr_w(prop->name), debugstr_variant(retv));
 487     return hres;
 488 }
 489
 490 static HRESULT prop_put(jsdisp_t *This, dispex_prop_t *prop, VARIANT *val,
 491         jsexcept_t *ei, IServiceProvider *caller)
 492 {
 493     HRESULT hres;
 494
 495     if(prop->flags & PROPF_CONST)
 496         return S_OK;
 497
 498     switch(prop->type) {
 499     case PROP_BUILTIN:
 500         if(!(prop->flags & PROPF_METHOD)) {
 501             DISPPARAMS dp = {val, NULL, 1, 0};
 502             vdisp_t vthis;
 503
 504             set_jsdisp(&vthis, This);
 505             hres = prop->u.p->invoke(This->ctx, &vthis, DISPATCH_PROPERTYPUT, &dp, NULL, ei);
 506             vdisp_release(&vthis);
 507             return hres;
 508         }
 509     case PROP_PROTREF:
 510         prop->type = PROP_VARIANT;
 511         prop->flags = PROPF_ENUM;
 512         V_VT(&prop->u.var) = VT_EMPTY;
 513         break;
 514     case PROP_VARIANT:
 515         VariantClear(&prop->u.var);
 516         break;
 517     default:
 518         ERR("type %d\n", prop->type);
 519         return E_FAIL;
 520     }
 521
 522     hres = VariantCopy(&prop->u.var, val);
 523     if(FAILED(hres))
 524         return hres;
 525
 526     if(This->builtin_info->on_put)
 527         This->builtin_info->on_put(This, prop->name);
 528
 529     TRACE("%s = %s\n", debugstr_w(prop->name), debugstr_variant(val));
 530     return S_OK;
 531 }
 532
 533 static HRESULT fill_protrefs(jsdisp_t *This)
 534 {
 535     dispex_prop_t *iter, *prop;
 536     HRESULT hres;
 537
 538     if(!This->prototype)
 539         return S_OK;
 540
 541     fill_protrefs(This->prototype);
 542
 543     for(iter = This->prototype->props; iter < This->prototype->props+This->prototype->prop_cnt; iter++) {
 544         if(!iter->name)
 545             continue;
 546         hres = find_prop_name(This, iter->hash, iter->name, &prop);
 547         if(FAILED(hres))
 548             return hres;
 549         if(!prop || prop->type==PROP_DELETED) {
 550             if(prop) {
 551                 prop->type = PROP_PROTREF;
 552                 prop->flags = 0;
 553                 prop->u.ref = iter - This->prototype->props;
 554             }else {
 555                 prop = alloc_protref(This, iter->name, iter - This->prototype->props);
 556                 if(!prop)
 557                     return E_OUTOFMEMORY;
 558             }
 559         }
 560     }
 561
 562     return S_OK;
 563 }
 564
 565 static inline jsdisp_t *impl_from_IDispatchEx(IDispatchEx *iface)
 566 {
 567     return CONTAINING_RECORD(iface, jsdisp_t, IDispatchEx_iface);
 568 }
 569
 570 static HRESULT WINAPI DispatchEx_QueryInterface(IDispatchEx *iface, REFIID riid, void **ppv)
 571 {
 572     jsdisp_t *This = impl_from_IDispatchEx(iface);
 573
 574     if(IsEqualGUID(&IID_IUnknown, riid)) {
 575         TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv);
 576         *ppv = &This->IDispatchEx_iface;
 577     }else if(IsEqualGUID(&IID_IDispatch, riid)) {
 578         TRACE("(%p)->(IID_IDispatch %p)\n", This, ppv);
 579         *ppv = &This->IDispatchEx_iface;
 580     }else if(IsEqualGUID(&IID_IDispatchEx, riid)) {
 581         TRACE("(%p)->(IID_IDispatchEx %p)\n", This, ppv);
 582         *ppv = &This->IDispatchEx_iface;
 583     }else if(IsEqualGUID(&IID_IDispatchJS, riid)) {
 584         TRACE("(%p)->(IID_IDispatchJS %p)\n", This, ppv);
 585         jsdisp_addref(This);
 586         *ppv = This;
 587         return S_OK;
 588     }else {
 589         WARN("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppv);
 590         *ppv = NULL;
 591         return E_NOINTERFACE;
 592     }
 593
 594     IUnknown_AddRef((IUnknown*)*ppv);
 595     return S_OK;
 596 }
 597
 598 static ULONG WINAPI DispatchEx_AddRef(IDispatchEx *iface)
 599 {
 600     jsdisp_t *This = impl_from_IDispatchEx(iface);
 601     LONG ref = InterlockedIncrement(&This->ref);
 602
 603     TRACE("(%p) ref=%d\n", This, ref);
 604
 605     return ref;
 606 }
 607
 608 static ULONG WINAPI DispatchEx_Release(IDispatchEx *iface)
 609 {
 610     jsdisp_t *This = impl_from_IDispatchEx(iface);
 611     LONG ref = InterlockedDecrement(&This->ref);
 612
 613     TRACE("(%p) ref=%d\n", This, ref);
 614
 615     if(!ref) {
 616         dispex_prop_t *prop;
 617
 618         for(prop = This->props; prop < This->props+This->prop_cnt; prop++) {
 619             if(prop->type == PROP_VARIANT)
 620                 VariantClear(&prop->u.var);
 621             heap_free(prop->name);
 622         }
 623         heap_free(This->props);
 624         script_release(This->ctx);
 625         if(This->prototype)
 626             jsdisp_release(This->prototype);
 627
 628         if(This->builtin_info->destructor)
 629             This->builtin_info->destructor(This);
 630         else
 631             heap_free(This);
 632     }
 633
 634     return ref;
 635 }
 636
 637 static HRESULT WINAPI DispatchEx_GetTypeInfoCount(IDispatchEx *iface, UINT *pctinfo)
 638 {
 639     jsdisp_t *This = impl_from_IDispatchEx(iface);
 640
 641     TRACE("(%p)->(%p)\n", This, pctinfo);
 642
 643     *pctinfo = 1;
 644     return S_OK;
 645 }
 646
 647 static HRESULT WINAPI DispatchEx_GetTypeInfo(IDispatchEx *iface, UINT iTInfo, LCID lcid,
 648                                               ITypeInfo **ppTInfo)
 649 {
 650     jsdisp_t *This = impl_from_IDispatchEx(iface);
 651     FIXME("(%p)->(%u %u %p)\n", This, iTInfo, lcid, ppTInfo);
 652     return E_NOTIMPL;
 653 }
 654
 655 static HRESULT WINAPI DispatchEx_GetIDsOfNames(IDispatchEx *iface, REFIID riid,
 656                                                 LPOLESTR *rgszNames, UINT cNames, LCID lcid,
 657                                                 DISPID *rgDispId)
 658 {
 659     jsdisp_t *This = impl_from_IDispatchEx(iface);
 660     UINT i;
 661     HRESULT hres;
 662
 663     TRACE("(%p)->(%s %p %u %u %p)\n", This, debugstr_guid(riid), rgszNames, cNames,
 664           lcid, rgDispId);
 665
 666     for(i=0; i < cNames; i++) {
 667         hres = IDispatchEx_GetDispID(&This->IDispatchEx_iface, rgszNames[i], 0, rgDispId+i);
 668         if(FAILED(hres))
 669             return hres;
 670     }
 671
 672     return S_OK;
 673 }
 674
 675 static HRESULT WINAPI DispatchEx_Invoke(IDispatchEx *iface, DISPID dispIdMember,
 676                                         REFIID riid, LCID lcid, WORD wFlags, DISPPARAMS *pDispParams,
 677                             VARIANT *pVarResult, EXCEPINFO *pExcepInfo, UINT *puArgErr)
 678 {
 679     jsdisp_t *This = impl_from_IDispatchEx(iface);
 680
 681     TRACE("(%p)->(%d %s %d %d %p %p %p %p)\n", This, dispIdMember, debugstr_guid(riid),
 682           lcid, wFlags, pDispParams, pVarResult, pExcepInfo, puArgErr);
 683
 684     return IDispatchEx_InvokeEx(&This->IDispatchEx_iface, dispIdMember, lcid, wFlags,
 685             pDispParams, pVarResult, pExcepInfo, NULL);
 686 }
 687
 688 static HRESULT WINAPI DispatchEx_GetDispID(IDispatchEx *iface, BSTR bstrName, DWORD grfdex, DISPID *pid)
 689 {
 690     jsdisp_t *This = impl_from_IDispatchEx(iface);
 691
 692     TRACE("(%p)->(%s %x %p)\n", This, debugstr_w(bstrName), grfdex, pid);
 693
 694     if(grfdex & ~(fdexNameCaseSensitive|fdexNameEnsure|fdexNameImplicit|FDEX_VERSION_MASK)) {
 695         FIXME("Unsupported grfdex %x\n", grfdex);
 696         return E_NOTIMPL;
 697     }
 698
 699     return jsdisp_get_id(This, bstrName, grfdex, pid);
 700 }
 701
 702 static HRESULT WINAPI DispatchEx_InvokeEx(IDispatchEx *iface, DISPID id, LCID lcid, WORD wFlags, DISPPARAMS *pdp,
 703         VARIANT *pvarRes, EXCEPINFO *pei, IServiceProvider *pspCaller)
 704 {
 705     jsdisp_t *This = impl_from_IDispatchEx(iface);
 706     dispex_prop_t *prop;
 707     jsexcept_t jsexcept;
 708     HRESULT hres;
 709
 710     TRACE("(%p)->(%x %x %x %p %p %p %p)\n", This, id, lcid, wFlags, pdp, pvarRes, pei, pspCaller);
 711
 712     if(pvarRes)
 713         V_VT(pvarRes) = VT_EMPTY;
 714
 715     prop = get_prop(This, id);
 716     if(!prop || prop->type == PROP_DELETED) {
 717         TRACE("invalid id\n");
 718         return DISP_E_MEMBERNOTFOUND;
 719     }
 720
 721     memset(&jsexcept, 0, sizeof(jsexcept));
 722
 723     switch(wFlags) {
 724     case DISPATCH_METHOD|DISPATCH_PROPERTYGET:
 725         wFlags = DISPATCH_METHOD;
 726         /* fall through */
 727     case DISPATCH_METHOD:
 728     case DISPATCH_CONSTRUCT:
 729         hres = invoke_prop_func(This, This, prop, wFlags, pdp, pvarRes, &jsexcept, pspCaller);
 730         break;
 731     case DISPATCH_PROPERTYGET:
 732         hres = prop_get(This, prop, pdp, pvarRes, &jsexcept, pspCaller);
 733         break;
 734     case DISPATCH_PROPERTYPUT: {
 735         DWORD i;
 736
 737         for(i=0; i < pdp->cNamedArgs; i++) {
 738             if(pdp->rgdispidNamedArgs[i] == DISPID_PROPERTYPUT)
 739                 break;
 740         }
 741
 742         if(i == pdp->cNamedArgs) {
 743             TRACE("no value to set\n");
 744             return DISP_E_PARAMNOTOPTIONAL;
 745         }
 746
 747         hres = prop_put(This, prop, pdp->rgvarg+i, &jsexcept, pspCaller);
 748         break;
 749     }
 750     default:
 751         FIXME("Unimplemented flags %x\n", wFlags);
 752         return E_INVALIDARG;
 753     }
 754
 755     if(pei)
 756         *pei = jsexcept.ei;
 757
 758     return hres;
 759 }
 760
 761 static HRESULT delete_prop(dispex_prop_t *prop)
 762 {
 763     if(prop->type == PROP_VARIANT) {
 764         VariantClear(&prop->u.var);
 765         prop->type = PROP_DELETED;
 766     }
 767     return S_OK;
 768 }
 769
 770 static HRESULT WINAPI DispatchEx_DeleteMemberByName(IDispatchEx *iface, BSTR bstrName, DWORD grfdex)
 771 {
 772     jsdisp_t *This = impl_from_IDispatchEx(iface);
 773     dispex_prop_t *prop;
 774     HRESULT hres;
 775
 776     TRACE("(%p)->(%s %x)\n", This, debugstr_w(bstrName), grfdex);
 777
 778     if(grfdex & ~(fdexNameCaseSensitive|fdexNameEnsure|fdexNameImplicit|FDEX_VERSION_MASK))
 779         FIXME("Unsupported grfdex %x\n", grfdex);
 780
 781     hres = find_prop_name(This, string_hash(bstrName), bstrName, &prop);
 782     if(FAILED(hres))
 783         return hres;
 784     if(!prop) {
 785         TRACE("not found\n");
 786         return S_OK;
 787     }
 788
 789     return delete_prop(prop);
 790 }
 791
 792 static HRESULT WINAPI DispatchEx_DeleteMemberByDispID(IDispatchEx *iface, DISPID id)
 793 {
 794     jsdisp_t *This = impl_from_IDispatchEx(iface);
 795     dispex_prop_t *prop;
 796
 797     TRACE("(%p)->(%x)\n", This, id);
 798
 799     prop = get_prop(This, id);
 800     if(!prop) {
 801         WARN("invalid id\n");
 802         return DISP_E_MEMBERNOTFOUND;
 803     }
 804
 805     return delete_prop(prop);
 806 }
 807
 808 static HRESULT WINAPI DispatchEx_GetMemberProperties(IDispatchEx *iface, DISPID id, DWORD grfdexFetch, DWORD *pgrfdex)
 809 {
 810     jsdisp_t *This = impl_from_IDispatchEx(iface);
 811     FIXME("(%p)->(%x %x %p)\n", This, id, grfdexFetch, pgrfdex);
 812     return E_NOTIMPL;
 813 }
 814
 815 static HRESULT WINAPI DispatchEx_GetMemberName(IDispatchEx *iface, DISPID id, BSTR *pbstrName)
 816 {
 817     jsdisp_t *This = impl_from_IDispatchEx(iface);
 818     dispex_prop_t *prop;
 819
 820     TRACE("(%p)->(%x %p)\n", This, id, pbstrName);
 821
 822     prop = get_prop(This, id);
 823     if(!prop || !prop->name || prop->type == PROP_DELETED)
 824         return DISP_E_MEMBERNOTFOUND;
 825
 826     *pbstrName = SysAllocString(prop->name);
 827     if(!*pbstrName)
 828         return E_OUTOFMEMORY;
 829
 830     return S_OK;
 831 }
 832
 833 static HRESULT WINAPI DispatchEx_GetNextDispID(IDispatchEx *iface, DWORD grfdex, DISPID id, DISPID *pid)
 834 {
 835     jsdisp_t *This = impl_from_IDispatchEx(iface);
 836     dispex_prop_t *iter;
 837     HRESULT hres;
 838
 839     TRACE("(%p)->(%x %x %p)\n", This, grfdex, id, pid);
 840
 841     if(id == DISPID_STARTENUM) {
 842         hres = fill_protrefs(This);
 843         if(FAILED(hres))
 844             return hres;
 845     }
 846
 847     if(id+1>=0 && id+1<This->prop_cnt) {
 848         iter = &This->props[id+1];
 849     }else {
 850         *pid = DISPID_STARTENUM;
 851         return S_FALSE;
 852     }
 853
 854     while(iter < This->props + This->prop_cnt) {
 855         if(iter->name && (get_flags(This, iter) & PROPF_ENUM) && iter->type!=PROP_DELETED) {
 856             *pid = prop_to_id(This, iter);
 857             return S_OK;
 858         }
 859         iter++;
 860     }
 861
 862     *pid = DISPID_STARTENUM;
 863     return S_FALSE;
 864 }
 865
 866 static HRESULT WINAPI DispatchEx_GetNameSpaceParent(IDispatchEx *iface, IUnknown **ppunk)
 867 {
 868     jsdisp_t *This = impl_from_IDispatchEx(iface);
 869     FIXME("(%p)->(%p)\n", This, ppunk);
 870     return E_NOTIMPL;
 871 }
 872
 873 static IDispatchExVtbl DispatchExVtbl = {
 874     DispatchEx_QueryInterface,
 875     DispatchEx_AddRef,
 876     DispatchEx_Release,
 877     DispatchEx_GetTypeInfoCount,
 878     DispatchEx_GetTypeInfo,
 879     DispatchEx_GetIDsOfNames,
 880     DispatchEx_Invoke,
 881     DispatchEx_GetDispID,
 882     DispatchEx_InvokeEx,
 883     DispatchEx_DeleteMemberByName,
 884     DispatchEx_DeleteMemberByDispID,
 885     DispatchEx_GetMemberProperties,
 886     DispatchEx_GetMemberName,
 887     DispatchEx_GetNextDispID,
 888     DispatchEx_GetNameSpaceParent
 889 };
 890
 891 jsdisp_t *as_jsdisp(IDispatch *disp)
 892 {
 893     assert(disp->lpVtbl == (IDispatchVtbl*)&DispatchExVtbl);
 894     return impl_from_IDispatchEx((IDispatchEx*)disp);
 895 }
 896
 897 jsdisp_t *to_jsdisp(IDispatch *disp)
 898 {
 899     return disp->lpVtbl == (IDispatchVtbl*)&DispatchExVtbl ? impl_from_IDispatchEx((IDispatchEx*)disp) : NULL;
 900 }
 901
 902 HRESULT init_dispex(jsdisp_t *dispex, script_ctx_t *ctx, const builtin_info_t *builtin_info, jsdisp_t *prototype)
 903 {
 904     TRACE("%p (%p)\n", dispex, prototype);
 905
 906     dispex->IDispatchEx_iface.lpVtbl = &DispatchExVtbl;
 907     dispex->ref = 1;
 908     dispex->builtin_info = builtin_info;
 909
 910     dispex->props = heap_alloc_zero(sizeof(dispex_prop_t)*(dispex->buf_size=4));
 911     if(!dispex->props)
 912         return E_OUTOFMEMORY;
 913
 914     dispex->prototype = prototype;
 915     if(prototype)
 916         jsdisp_addref(prototype);
 917
 918     dispex->prop_cnt = 1;
 919     if(builtin_info->value_prop.invoke) {
 920         dispex->props[0].type = PROP_BUILTIN;
 921         dispex->props[0].u.p = &builtin_info->value_prop;
 922     }else {
 923         dispex->props[0].type = PROP_DELETED;
 924     }
 925
 926     script_addref(ctx);
 927     dispex->ctx = ctx;
 928
 929     return S_OK;
 930 }
 931
 932 static const builtin_info_t dispex_info = {
 933     JSCLASS_NONE,
 934     {NULL, NULL, 0},
 935     0, NULL,
 936     NULL,
 937     NULL
 938 };
 939
 940 HRESULT create_dispex(script_ctx_t *ctx, const builtin_info_t *builtin_info, jsdisp_t *prototype, jsdisp_t **dispex)
 941 {
 942     jsdisp_t *ret;
 943     HRESULT hres;
 944
 945     ret = heap_alloc_zero(sizeof(jsdisp_t));
 946     if(!ret)
 947         return E_OUTOFMEMORY;
 948
 949     hres = init_dispex(ret, ctx, builtin_info ? builtin_info : &dispex_info, prototype);
 950     if(FAILED(hres))
 951         return hres;
 952
 953     *dispex = ret;
 954     return S_OK;
 955 }
 956
 957 HRESULT init_dispex_from_constr(jsdisp_t *dispex, script_ctx_t *ctx, const builtin_info_t *builtin_info, jsdisp_t *constr)
 958 {
 959     jsdisp_t *prot = NULL;
 960     dispex_prop_t *prop;
 961     HRESULT hres;
 962
 963     static const WCHAR constructorW[] = {'c','o','n','s','t','r','u','c','t','o','r',0};
 964     static const WCHAR prototypeW[] = {'p','r','o','t','o','t','y','p','e',0};
 965
 966     hres = find_prop_name_prot(constr, string_hash(prototypeW), prototypeW, &prop);
 967     if(SUCCEEDED(hres) && prop && prop->type!=PROP_DELETED) {
 968         jsexcept_t jsexcept;
 969         VARIANT var;
 970
 971         V_VT(&var) = VT_EMPTY;
 972         memset(&jsexcept, 0, sizeof(jsexcept));
 973         hres = prop_get(constr, prop, NULL, &var, &jsexcept, NULL/*FIXME*/);
 974         if(FAILED(hres)) {
 975             ERR("Could not get prototype\n");
 976             return hres;
 977         }
 978
 979         if(V_VT(&var) == VT_DISPATCH)
 980             prot = iface_to_jsdisp((IUnknown*)V_DISPATCH(&var));
 981         VariantClear(&var);
 982     }
 983
 984     hres = init_dispex(dispex, ctx, builtin_info, prot);
 985
 986     if(prot)
 987         jsdisp_release(prot);
 988     if(FAILED(hres))
 989         return hres;
 990
 991     hres = ensure_prop_name(dispex, constructorW, FALSE, 0, &prop);
 992     if(SUCCEEDED(hres)) {
 993         jsexcept_t jsexcept;
 994         VARIANT var;
 995
 996         var_set_jsdisp(&var, constr);
 997         memset(&jsexcept, 0, sizeof(jsexcept));
 998         hres = prop_put(dispex, prop, &var, &jsexcept, NULL/*FIXME*/);
 999     }
1000     if(FAILED(hres))
1001         jsdisp_release(dispex);
1002
1003     return hres;
1004 }
1005
1006 jsdisp_t *iface_to_jsdisp(IUnknown *iface)
1007 {
1008     jsdisp_t *ret;
1009     HRESULT hres;
1010
1011     hres = IUnknown_QueryInterface(iface, &IID_IDispatchJS, (void**)&ret);
1012     if(FAILED(hres))
1013         return NULL;
1014
1015     return ret;
1016 }
1017
1018 static void ensure_retval_type(VARIANT *v)
1019 {
1020     switch(V_VT(v)) {
1021     case VT_I2:
1022         V_VT(v) = VT_I4;
1023         V_I4(v) = V_I2(v);
1024         break;
1025     case VT_INT:
1026         V_VT(v) = VT_I4;
1027         V_I4(v) = V_INT(v);
1028     }
1029 }
1030
1031 HRESULT jsdisp_get_id(jsdisp_t *jsdisp, const WCHAR *name, DWORD flags, DISPID *id)
1032 {
1033     dispex_prop_t *prop;
1034     HRESULT hres;
1035
1036     if(flags & fdexNameEnsure)
1037         hres = ensure_prop_name(jsdisp, name, TRUE, PROPF_ENUM, &prop);
1038     else
1039         hres = find_prop_name_prot(jsdisp, string_hash(name), name, &prop);
1040     if(FAILED(hres))
1041         return hres;
1042
1043     if(prop && prop->type!=PROP_DELETED) {
1044         *id = prop_to_id(jsdisp, prop);
1045         return S_OK;
1046     }
1047
1048     TRACE("not found %s\n", debugstr_w(name));
1049     return DISP_E_UNKNOWNNAME;
1050 }
1051
1052 HRESULT jsdisp_call_value(jsdisp_t *jsthis, WORD flags, DISPPARAMS *dp, VARIANT *retv, jsexcept_t *ei)
1053 {
1054     vdisp_t vdisp;
1055     HRESULT hres;
1056
1057     set_jsdisp(&vdisp, jsthis);
1058     hres = jsthis->builtin_info->value_prop.invoke(jsthis->ctx, &vdisp, flags, dp, retv, ei);
1059     vdisp_release(&vdisp);
1060     return hres;
1061 }
1062
1063 HRESULT jsdisp_call(jsdisp_t *disp, DISPID id, WORD flags, DISPPARAMS *dp, VARIANT *retv, jsexcept_t *ei)
1064 {
1065     dispex_prop_t *prop;
1066
1067     memset(ei, 0, sizeof(*ei));
1068     if(retv)
1069         V_VT(retv) = VT_EMPTY;
1070
1071     prop = get_prop(disp, id);
1072     if(!prop)
1073         return DISP_E_MEMBERNOTFOUND;
1074
1075     return invoke_prop_func(disp, disp, prop, flags, dp, retv, ei, NULL);
1076 }
1077
1078 HRESULT jsdisp_call_name(jsdisp_t *disp, const WCHAR *name, WORD flags, DISPPARAMS *dp, VARIANT *retv,
1079         jsexcept_t *ei)
1080 {
1081     dispex_prop_t *prop;
1082     HRESULT hres;
1083
1084     hres = find_prop_name_prot(disp, string_hash(name), name, &prop);
1085     if(FAILED(hres))
1086         return hres;
1087
1088     memset(ei, 0, sizeof(*ei));
1089     if(retv)
1090         V_VT(retv) = VT_EMPTY;
1091
1092     return invoke_prop_func(disp, disp, prop, flags, dp, retv, ei, NULL);
1093 }
1094
1095 HRESULT disp_call(script_ctx_t *ctx, IDispatch *disp, DISPID id, WORD flags, DISPPARAMS *dp, VARIANT *retv, jsexcept_t *ei)
1096 {
1097     jsdisp_t *jsdisp;
1098     IDispatchEx *dispex;
1099     HRESULT hres;
1100
1101     jsdisp = iface_to_jsdisp((IUnknown*)disp);
1102     if(jsdisp) {
1103         if(flags & DISPATCH_PROPERTYPUT) {
1104             FIXME("disp_call(propput) on builtin object\n");
1105             return E_FAIL;
1106         }
1107
1108         hres = jsdisp_call(jsdisp, id, flags, dp, retv, ei);
1109         jsdisp_release(jsdisp);
1110         return hres;
1111     }
1112
1113     memset(ei, 0, sizeof(*ei));
1114     if(retv && arg_cnt(dp))
1115         flags |= DISPATCH_PROPERTYGET;
1116
1117     if(retv)
1118         V_VT(retv) = VT_EMPTY;
1119     hres = IDispatch_QueryInterface(disp, &IID_IDispatchEx, (void**)&dispex);
1120     if(SUCCEEDED(hres)) {
1121         hres = IDispatchEx_InvokeEx(dispex, id, ctx->lcid, flags, dp, retv, &ei->ei, &ctx->jscaller->IServiceProvider_iface);
1122         IDispatchEx_Release(dispex);
1123     }else {
1124         UINT err = 0;
1125
1126         if(flags == DISPATCH_CONSTRUCT) {
1127             WARN("IDispatch cannot be constructor\n");
1128             return DISP_E_MEMBERNOTFOUND;
1129         }
1130
1131         TRACE("using IDispatch\n");
1132         hres = IDispatch_Invoke(disp, id, &IID_NULL, ctx->lcid, flags, dp, retv, &ei->ei, &err);
1133     }
1134
1135     if(FAILED(hres))
1136         return hres;
1137
1138     if(retv)
1139         ensure_retval_type(retv);
1140     return S_OK;
1141 }
1142
1143 HRESULT jsdisp_propput_name(jsdisp_t *obj, const WCHAR *name, VARIANT *val, jsexcept_t *ei)
1144 {
1145     dispex_prop_t *prop;
1146     HRESULT hres;
1147
1148     hres = ensure_prop_name(obj, name, FALSE, PROPF_ENUM, &prop);
1149     if(FAILED(hres))
1150         return hres;
1151
1152     return prop_put(obj, prop, val, ei, NULL);
1153 }
1154
1155 HRESULT jsdisp_propput_const(jsdisp_t *obj, const WCHAR *name, VARIANT *val)
1156 {
1157     dispex_prop_t *prop;
1158     HRESULT hres;
1159
1160     hres = ensure_prop_name(obj, name, FALSE, PROPF_ENUM|PROPF_CONST, &prop);
1161     if(FAILED(hres))
1162         return hres;
1163
1164     return VariantCopy(&prop->u.var, val);
1165 }
1166
1167 HRESULT jsdisp_propput_idx(jsdisp_t *obj, DWORD idx, VARIANT *val, jsexcept_t *ei)
1168 {
1169     WCHAR buf[12];
1170
1171     static const WCHAR formatW[] = {'%','d',0};
1172
1173     sprintfW(buf, formatW, idx);
1174     return jsdisp_propput_name(obj, buf, val, ei);
1175 }
1176
1177 HRESULT disp_propput(script_ctx_t *ctx, IDispatch *disp, DISPID id, VARIANT *val, jsexcept_t *ei)
1178 {
1179     jsdisp_t *jsdisp;
1180     HRESULT hres;
1181
1182     jsdisp = iface_to_jsdisp((IUnknown*)disp);
1183     if(jsdisp) {
1184         dispex_prop_t *prop;
1185
1186         prop = get_prop(jsdisp, id);
1187         if(prop)
1188             hres = prop_put(jsdisp, prop, val, ei, NULL);
1189         else
1190             hres = DISP_E_MEMBERNOTFOUND;
1191
1192         jsdisp_release(jsdisp);
1193     }else {
1194         DISPID dispid = DISPID_PROPERTYPUT;
1195         DISPPARAMS dp  = {val, &dispid, 1, 1};
1196         IDispatchEx *dispex;
1197
1198         hres = IDispatch_QueryInterface(disp, &IID_IDispatchEx, (void**)&dispex);
1199         if(SUCCEEDED(hres)) {
1200             hres = IDispatchEx_InvokeEx(dispex, id, ctx->lcid, DISPATCH_PROPERTYPUT, &dp, NULL, &ei->ei,
1201                     &ctx->jscaller->IServiceProvider_iface);
1202             IDispatchEx_Release(dispex);
1203         }else {
1204             ULONG err = 0;
1205
1206             TRACE("using IDispatch\n");
1207             hres = IDispatch_Invoke(disp, id, &IID_NULL, ctx->lcid, DISPATCH_PROPERTYPUT, &dp, NULL, &ei->ei, &err);
1208         }
1209     }
1210
1211     return hres;
1212 }
1213
1214 HRESULT jsdisp_propget_name(jsdisp_t *obj, const WCHAR *name, VARIANT *var, jsexcept_t *ei)
1215 {
1216     DISPPARAMS dp = {NULL, NULL, 0, 0};
1217     dispex_prop_t *prop;
1218     HRESULT hres;
1219
1220     hres = find_prop_name_prot(obj, string_hash(name), name, &prop);
1221     if(FAILED(hres))
1222         return hres;
1223
1224     V_VT(var) = VT_EMPTY;
1225     if(!prop || prop->type==PROP_DELETED)
1226         return S_OK;
1227
1228     return prop_get(obj, prop, &dp, var, ei, NULL);
1229 }
1230
1231 HRESULT jsdisp_get_idx(jsdisp_t *obj, DWORD idx, VARIANT *var, jsexcept_t *ei)
1232 {
1233     WCHAR name[12];
1234     DISPPARAMS dp = {NULL, NULL, 0, 0};
1235     dispex_prop_t *prop;
1236     HRESULT hres;
1237
1238     static const WCHAR formatW[] = {'%','d',0};
1239
1240     sprintfW(name, formatW, idx);
1241
1242     hres = find_prop_name_prot(obj, string_hash(name), name, &prop);
1243     if(FAILED(hres))
1244         return hres;
1245
1246     V_VT(var) = VT_EMPTY;
1247     if(!prop || prop->type==PROP_DELETED)
1248         return DISP_E_UNKNOWNNAME;
1249
1250     return prop_get(obj, prop, &dp, var, ei, NULL);
1251 }
1252
1253 HRESULT jsdisp_propget(jsdisp_t *jsdisp, DISPID id, VARIANT *val, jsexcept_t *ei)
1254 {
1255     DISPPARAMS dp  = {NULL,NULL,0,0};
1256     dispex_prop_t *prop;
1257
1258     prop = get_prop(jsdisp, id);
1259     if(!prop)
1260         return DISP_E_MEMBERNOTFOUND;
1261
1262     V_VT(val) = VT_EMPTY;
1263     return prop_get(jsdisp, prop, &dp, val, ei, NULL);
1264 }
1265
1266 HRESULT disp_propget(script_ctx_t *ctx, IDispatch *disp, DISPID id, VARIANT *val, jsexcept_t *ei)
1267 {
1268     DISPPARAMS dp  = {NULL,NULL,0,0};
1269     IDispatchEx *dispex;
1270     jsdisp_t *jsdisp;
1271     HRESULT hres;
1272
1273     jsdisp = iface_to_jsdisp((IUnknown*)disp);
1274     if(jsdisp) {
1275         hres = jsdisp_propget(jsdisp, id, val, ei);
1276         jsdisp_release(jsdisp);
1277         return hres;
1278     }
1279
1280     hres = IDispatch_QueryInterface(disp, &IID_IDispatchEx, (void**)&dispex);
1281     if(SUCCEEDED(hres)) {
1282         hres = IDispatchEx_InvokeEx(dispex, id, ctx->lcid, INVOKE_PROPERTYGET, &dp, val, &ei->ei,
1283                 &ctx->jscaller->IServiceProvider_iface);
1284         IDispatchEx_Release(dispex);
1285     }else {
1286         ULONG err = 0;
1287
1288         TRACE("using IDispatch\n");
1289         hres = IDispatch_Invoke(disp, id, &IID_NULL, ctx->lcid, INVOKE_PROPERTYGET, &dp, val, &ei->ei, &err);
1290     }
1291     if(FAILED(hres))
1292         return hres;
1293
1294     ensure_retval_type(val);
1295     return S_OK;
1296 }
1297
1298 HRESULT jsdisp_delete_idx(jsdisp_t *obj, DWORD idx)
1299 {
1300     static const WCHAR formatW[] = {'%','d',0};
1301     WCHAR buf[12];
1302     dispex_prop_t *prop;
1303     HRESULT hres;
1304
1305     sprintfW(buf, formatW, idx);
1306
1307     hres = find_prop_name(obj, string_hash(buf), buf, &prop);
1308     if(FAILED(hres) || !prop)
1309         return hres;
1310
1311     return delete_prop(prop);
1312 }
1313
1314 VARIANT_BOOL jsdisp_is_own_prop(jsdisp_t *obj, BSTR name)
1315 {
1316     dispex_prop_t *prop;
1317     HRESULT hres;
1318
1319     hres = find_prop_name(obj, string_hash(name), name, &prop);
1320     if(FAILED(hres))
1321         return VARIANT_FALSE;
1322     else if(!prop)
1323         return VARIANT_FALSE;
1324
1325     return prop->type==PROP_VARIANT ? VARIANT_TRUE : VARIANT_FALSE;
1326 }