dlls/jscript/engine.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 "config.h"
  20 #include "wine/port.h"
  21
  22 #include <math.h>
  23 #include <assert.h>
  24
  25 #include "jscript.h"
  26 #include "engine.h"
  27
  28 #include "wine/debug.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(jscript);
  31
  32 #define EXPR_NOVAL   0x0001
  33 #define EXPR_NEWREF  0x0002
  34 #define EXPR_STRREF  0x0004
  35
  36 struct _return_type_t {
  37     enum{
  38         RT_NORMAL,
  39         RT_RETURN,
  40         RT_BREAK,
  41         RT_CONTINUE
  42     } type;
  43     jsexcept_t ei;
  44 };
  45
  46 static inline HRESULT stat_eval(script_ctx_t *ctx, statement_t *stat, return_type_t *rt, VARIANT *ret)
  47 {
  48     return stat->eval(ctx, stat, rt, ret);
  49 }
  50
  51 static inline HRESULT expr_eval(script_ctx_t *ctx, expression_t *expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
  52 {
  53     return expr->eval(ctx, expr, flags, ei, ret);
  54 }
  55
  56 static HRESULT stack_push(exec_ctx_t *ctx, VARIANT *v)
  57 {
  58     if(!ctx->stack_size) {
  59         ctx->stack = heap_alloc(16*sizeof(VARIANT));
  60         if(!ctx->stack)
  61             return E_OUTOFMEMORY;
  62         ctx->stack_size = 16;
  63     }else if(ctx->stack_size == ctx->top) {
  64         VARIANT *new_stack;
  65
  66         new_stack = heap_realloc(ctx->stack, ctx->stack_size*2*sizeof(VARIANT));
  67         if(!new_stack) {
  68             VariantClear(v);
  69             return E_OUTOFMEMORY;
  70         }
  71
  72         ctx->stack = new_stack;
  73         ctx->stack_size *= 2;
  74     }
  75
  76     ctx->stack[ctx->top++] = *v;
  77     return S_OK;
  78 }
  79
  80 static HRESULT stack_push_bool(exec_ctx_t *ctx, BOOL b)
  81 {
  82     VARIANT v;
  83
  84     V_VT(&v) = VT_BOOL;
  85     V_BOOL(&v) = b ? VARIANT_TRUE : VARIANT_FALSE;
  86     return stack_push(ctx, &v);
  87 }
  88
  89 static inline VARIANT *stack_pop(exec_ctx_t *ctx)
  90 {
  91     assert(ctx->top);
  92     return ctx->stack + --ctx->top;
  93 }
  94
  95 static void stack_popn(exec_ctx_t *ctx, unsigned n)
  96 {
  97     while(n--)
  98         VariantClear(stack_pop(ctx));
  99 }
 100
 101 static void exprval_release(exprval_t *val)
 102 {
 103     switch(val->type) {
 104     case EXPRVAL_VARIANT:
 105         if(V_VT(&val->u.var) != VT_EMPTY)
 106             VariantClear(&val->u.var);
 107         return;
 108     case EXPRVAL_IDREF:
 109         if(val->u.idref.disp)
 110             IDispatch_Release(val->u.idref.disp);
 111         return;
 112     case EXPRVAL_NAMEREF:
 113         if(val->u.nameref.disp)
 114             IDispatch_Release(val->u.nameref.disp);
 115         SysFreeString(val->u.nameref.name);
 116         return;
 117     case EXPRVAL_INVALID:
 118         SysFreeString(val->u.identifier);
 119     }
 120 }
 121
 122 /* ECMA-262 3rd Edition    8.7.1 */
 123 static HRESULT exprval_value(script_ctx_t *ctx, exprval_t *val, jsexcept_t *ei, VARIANT *ret)
 124 {
 125     V_VT(ret) = VT_EMPTY;
 126
 127     switch(val->type) {
 128     case EXPRVAL_VARIANT:
 129         return VariantCopy(ret, &val->u.var);
 130     case EXPRVAL_IDREF:
 131         if(!val->u.idref.disp) {
 132             FIXME("throw ReferenceError\n");
 133             return E_FAIL;
 134         }
 135
 136         return disp_propget(ctx, val->u.idref.disp, val->u.idref.id, ret, ei, NULL/*FIXME*/);
 137     case EXPRVAL_NAMEREF:
 138         break;
 139     case EXPRVAL_INVALID:
 140         return throw_type_error(ctx, ei, JS_E_UNDEFINED_VARIABLE, val->u.identifier);
 141     }
 142
 143     ERR("type %d\n", val->type);
 144     return E_FAIL;
 145 }
 146
 147 static HRESULT exprval_to_value(script_ctx_t *ctx, exprval_t *val, jsexcept_t *ei, VARIANT *ret)
 148 {
 149     if(val->type == EXPRVAL_VARIANT) {
 150         *ret = val->u.var;
 151         V_VT(&val->u.var) = VT_EMPTY;
 152         return S_OK;
 153     }
 154
 155     return exprval_value(ctx, val, ei, ret);
 156 }
 157
 158 static HRESULT exprval_to_boolean(script_ctx_t *ctx, exprval_t *exprval, jsexcept_t *ei, VARIANT_BOOL *b)
 159 {
 160     if(exprval->type != EXPRVAL_VARIANT) {
 161         VARIANT val;
 162         HRESULT hres;
 163
 164         hres = exprval_to_value(ctx, exprval, ei, &val);
 165         if(FAILED(hres))
 166             return hres;
 167
 168         hres = to_boolean(&val, b);
 169         VariantClear(&val);
 170         return hres;
 171     }
 172
 173     return to_boolean(&exprval->u.var, b);
 174 }
 175
 176 static void exprval_init(exprval_t *val)
 177 {
 178     val->type = EXPRVAL_VARIANT;
 179     V_VT(&val->u.var) = VT_EMPTY;
 180 }
 181
 182 static void exprval_set_idref(exprval_t *val, IDispatch *disp, DISPID id)
 183 {
 184     val->type = EXPRVAL_IDREF;
 185     val->u.idref.disp = disp;
 186     val->u.idref.id = id;
 187
 188     if(disp)
 189         IDispatch_AddRef(disp);
 190 }
 191
 192 HRESULT scope_push(scope_chain_t *scope, jsdisp_t *obj, scope_chain_t **ret)
 193 {
 194     scope_chain_t *new_scope;
 195
 196     new_scope = heap_alloc(sizeof(scope_chain_t));
 197     if(!new_scope)
 198         return E_OUTOFMEMORY;
 199
 200     new_scope->ref = 1;
 201
 202     jsdisp_addref(obj);
 203     new_scope->obj = obj;
 204
 205     if(scope) {
 206         scope_addref(scope);
 207         new_scope->next = scope;
 208     }else {
 209         new_scope->next = NULL;
 210     }
 211
 212     *ret = new_scope;
 213     return S_OK;
 214 }
 215
 216 static void scope_pop(scope_chain_t **scope)
 217 {
 218     scope_chain_t *tmp;
 219
 220     tmp = *scope;
 221     *scope = tmp->next;
 222     scope_release(tmp);
 223 }
 224
 225 void scope_release(scope_chain_t *scope)
 226 {
 227     if(--scope->ref)
 228         return;
 229
 230     if(scope->next)
 231         scope_release(scope->next);
 232
 233     jsdisp_release(scope->obj);
 234     heap_free(scope);
 235 }
 236
 237 HRESULT create_exec_ctx(script_ctx_t *script_ctx, IDispatch *this_obj, jsdisp_t *var_disp,
 238         scope_chain_t *scope, BOOL is_global, exec_ctx_t **ret)
 239 {
 240     exec_ctx_t *ctx;
 241
 242     ctx = heap_alloc_zero(sizeof(exec_ctx_t));
 243     if(!ctx)
 244         return E_OUTOFMEMORY;
 245
 246     ctx->ref = 1;
 247     ctx->is_global = is_global;
 248
 249     if(this_obj)
 250         ctx->this_obj = this_obj;
 251     else if(script_ctx->host_global)
 252         ctx->this_obj = script_ctx->host_global;
 253     else
 254         ctx->this_obj = to_disp(script_ctx->global);
 255     IDispatch_AddRef(ctx->this_obj);
 256
 257     jsdisp_addref(var_disp);
 258     ctx->var_disp = var_disp;
 259
 260     if(scope) {
 261         scope_addref(scope);
 262         ctx->scope_chain = scope;
 263     }
 264
 265     *ret = ctx;
 266     return S_OK;
 267 }
 268
 269 void exec_release(exec_ctx_t *ctx)
 270 {
 271     if(--ctx->ref)
 272         return;
 273
 274     if(ctx->scope_chain)
 275         scope_release(ctx->scope_chain);
 276     if(ctx->var_disp)
 277         jsdisp_release(ctx->var_disp);
 278     if(ctx->this_obj)
 279         IDispatch_Release(ctx->this_obj);
 280     heap_free(ctx->stack);
 281     heap_free(ctx);
 282 }
 283
 284 static HRESULT disp_get_id(script_ctx_t *ctx, IDispatch *disp, BSTR name, DWORD flags, DISPID *id)
 285 {
 286     IDispatchEx *dispex;
 287     HRESULT hres;
 288
 289     hres = IDispatch_QueryInterface(disp, &IID_IDispatchEx, (void**)&dispex);
 290     if(FAILED(hres)) {
 291         TRACE("unsing IDispatch\n");
 292
 293         *id = 0;
 294         return IDispatch_GetIDsOfNames(disp, &IID_NULL, &name, 1, 0, id);
 295     }
 296
 297     *id = 0;
 298     hres = IDispatchEx_GetDispID(dispex, name, make_grfdex(ctx, flags|fdexNameCaseSensitive), id);
 299     IDispatchEx_Release(dispex);
 300     return hres;
 301 }
 302
 303 /* ECMA-262 3rd Edition    8.7.2 */
 304 static HRESULT put_value(script_ctx_t *ctx, exprval_t *ref, VARIANT *v, jsexcept_t *ei)
 305 {
 306     if(ref->type != EXPRVAL_IDREF)
 307         return throw_reference_error(ctx, ei, JS_E_ILLEGAL_ASSIGN, NULL);
 308
 309     return disp_propput(ctx, ref->u.idref.disp, ref->u.idref.id, v, ei, NULL/*FIXME*/);
 310 }
 311
 312 static inline BOOL is_null(const VARIANT *v)
 313 {
 314     return V_VT(v) == VT_NULL || (V_VT(v) == VT_DISPATCH && !V_DISPATCH(v));
 315 }
 316
 317 static HRESULT disp_cmp(IDispatch *disp1, IDispatch *disp2, BOOL *ret)
 318 {
 319     IObjectIdentity *identity;
 320     IUnknown *unk1, *unk2;
 321     HRESULT hres;
 322
 323     if(disp1 == disp2) {
 324         *ret = TRUE;
 325         return S_OK;
 326     }
 327
 328     if(!disp1 || !disp2) {
 329         *ret = FALSE;
 330         return S_OK;
 331     }
 332
 333     hres = IDispatch_QueryInterface(disp1, &IID_IUnknown, (void**)&unk1);
 334     if(FAILED(hres))
 335         return hres;
 336
 337     hres = IDispatch_QueryInterface(disp2, &IID_IUnknown, (void**)&unk2);
 338     if(FAILED(hres)) {
 339         IUnknown_Release(unk1);
 340         return hres;
 341     }
 342
 343     if(unk1 == unk2) {
 344         *ret = TRUE;
 345     }else {
 346         hres = IUnknown_QueryInterface(unk1, &IID_IObjectIdentity, (void**)&identity);
 347         if(SUCCEEDED(hres)) {
 348             hres = IObjectIdentity_IsEqualObject(identity, unk2);
 349             IObjectIdentity_Release(identity);
 350             *ret = hres == S_OK;
 351         }else {
 352             *ret = FALSE;
 353         }
 354     }
 355
 356     IUnknown_Release(unk1);
 357     IUnknown_Release(unk2);
 358     return S_OK;
 359 }
 360
 361 /* ECMA-262 3rd Edition    11.9.6 */
 362 static HRESULT equal2_values(VARIANT *lval, VARIANT *rval, BOOL *ret)
 363 {
 364     TRACE("\n");
 365
 366     if(V_VT(lval) != V_VT(rval)) {
 367         if(is_num_vt(V_VT(lval)) && is_num_vt(V_VT(rval)))
 368             *ret = num_val(lval) == num_val(rval);
 369         else if(is_null(lval))
 370             *ret = is_null(rval);
 371         else
 372             *ret = FALSE;
 373         return S_OK;
 374     }
 375
 376     switch(V_VT(lval)) {
 377     case VT_EMPTY:
 378     case VT_NULL:
 379         *ret = VARIANT_TRUE;
 380         break;
 381     case VT_I4:
 382         *ret = V_I4(lval) == V_I4(rval);
 383         break;
 384     case VT_R8:
 385         *ret = V_R8(lval) == V_R8(rval);
 386         break;
 387     case VT_BSTR:
 388         if(!V_BSTR(lval))
 389             *ret = SysStringLen(V_BSTR(rval))?FALSE:TRUE;
 390         else if(!V_BSTR(rval))
 391             *ret = SysStringLen(V_BSTR(lval))?FALSE:TRUE;
 392         else
 393             *ret = !strcmpW(V_BSTR(lval), V_BSTR(rval));
 394         break;
 395     case VT_DISPATCH:
 396         return disp_cmp(V_DISPATCH(lval), V_DISPATCH(rval), ret);
 397     case VT_BOOL:
 398         *ret = !V_BOOL(lval) == !V_BOOL(rval);
 399         break;
 400     default:
 401         FIXME("unimplemented vt %d\n", V_VT(lval));
 402         return E_NOTIMPL;
 403     }
 404
 405     return S_OK;
 406 }
 407
 408 static HRESULT literal_to_var(script_ctx_t *ctx, literal_t *literal, VARIANT *v)
 409 {
 410     switch(literal->type) {
 411     case LT_NULL:
 412         V_VT(v) = VT_NULL;
 413         break;
 414     case LT_INT:
 415         V_VT(v) = VT_I4;
 416         V_I4(v) = literal->u.lval;
 417         break;
 418     case LT_DOUBLE:
 419         V_VT(v) = VT_R8;
 420         V_R8(v) = literal->u.dval;
 421         break;
 422     case LT_STRING: {
 423         BSTR str = SysAllocString(literal->u.wstr);
 424         if(!str)
 425             return E_OUTOFMEMORY;
 426
 427         V_VT(v) = VT_BSTR;
 428         V_BSTR(v) = str;
 429         break;
 430     }
 431     case LT_BOOL:
 432         V_VT(v) = VT_BOOL;
 433         V_BOOL(v) = literal->u.bval;
 434         break;
 435     case LT_REGEXP: {
 436         jsdisp_t *regexp;
 437         HRESULT hres;
 438
 439         hres = create_regexp(ctx, literal->u.regexp.str, literal->u.regexp.str_len,
 440                              literal->u.regexp.flags, &regexp);
 441         if(FAILED(hres))
 442             return hres;
 443
 444         var_set_jsdisp(v, regexp);
 445     }
 446     }
 447
 448     return S_OK;
 449 }
 450
 451 static BOOL lookup_global_members(script_ctx_t *ctx, BSTR identifier, exprval_t *ret)
 452 {
 453     named_item_t *item;
 454     DISPID id;
 455     HRESULT hres;
 456
 457     for(item = ctx->named_items; item; item = item->next) {
 458         if(item->flags & SCRIPTITEM_GLOBALMEMBERS) {
 459             hres = disp_get_id(ctx, item->disp, identifier, 0, &id);
 460             if(SUCCEEDED(hres)) {
 461                 if(ret)
 462                     exprval_set_idref(ret, item->disp, id);
 463                 return TRUE;
 464             }
 465         }
 466     }
 467
 468     return FALSE;
 469 }
 470
 471 HRESULT exec_source(exec_ctx_t *ctx, parser_ctx_t *parser, source_elements_t *source, BOOL from_eval,
 472         jsexcept_t *ei, VARIANT *retv)
 473 {
 474     script_ctx_t *script = parser->script;
 475     function_declaration_t *func;
 476     parser_ctx_t *prev_parser;
 477     var_list_t *var;
 478     VARIANT val, tmp;
 479     statement_t *stat;
 480     exec_ctx_t *prev_ctx;
 481     return_type_t rt;
 482     HRESULT hres = S_OK;
 483
 484     for(func = source->functions; func; func = func->next) {
 485         jsdisp_t *func_obj;
 486         VARIANT var;
 487
 488         hres = create_source_function(parser, func->expr->parameter_list, func->expr->source_elements,
 489                 ctx->scope_chain, func->expr->src_str, func->expr->src_len, &func_obj);
 490         if(FAILED(hres))
 491             return hres;
 492
 493         var_set_jsdisp(&var, func_obj);
 494         hres = jsdisp_propput_name(ctx->var_disp, func->expr->identifier, &var, ei, NULL);
 495         jsdisp_release(func_obj);
 496         if(FAILED(hres))
 497             return hres;
 498     }
 499
 500     for(var = source->variables; var; var = var->next) {
 501         DISPID id = 0;
 502         BSTR name;
 503
 504         name = SysAllocString(var->identifier);
 505         if(!name)
 506             return E_OUTOFMEMORY;
 507
 508         if(!ctx->is_global || !lookup_global_members(parser->script, name, NULL))
 509             hres = jsdisp_get_id(ctx->var_disp, var->identifier, fdexNameEnsure, &id);
 510         SysFreeString(name);
 511         if(FAILED(hres))
 512             return hres;
 513     }
 514
 515     prev_ctx = script->exec_ctx;
 516     script->exec_ctx = ctx;
 517
 518     prev_parser = ctx->parser;
 519     ctx->parser = parser;
 520
 521     V_VT(&val) = VT_EMPTY;
 522     memset(&rt, 0, sizeof(rt));
 523     rt.type = RT_NORMAL;
 524
 525     for(stat = source->statement; stat; stat = stat->next) {
 526         hres = stat_eval(script, stat, &rt, &tmp);
 527         if(FAILED(hres))
 528             break;
 529
 530         VariantClear(&val);
 531         val = tmp;
 532         if(rt.type != RT_NORMAL)
 533             break;
 534     }
 535
 536     script->exec_ctx = prev_ctx;
 537     ctx->parser = prev_parser;
 538
 539     if(rt.type != RT_NORMAL && rt.type != RT_RETURN) {
 540         FIXME("wrong rt %d\n", rt.type);
 541         hres = E_FAIL;
 542     }
 543
 544     *ei = rt.ei;
 545     if(FAILED(hres)) {
 546         VariantClear(&val);
 547         return hres;
 548     }
 549
 550     if(!retv || (!from_eval && rt.type != RT_RETURN))
 551         VariantClear(&val);
 552     if(retv)
 553         *retv = val;
 554     return S_OK;
 555 }
 556
 557 /* ECMA-262 3rd Edition    10.1.4 */
 558 static HRESULT identifier_eval(script_ctx_t *ctx, BSTR identifier, DWORD flags, jsexcept_t *ei, exprval_t *ret)
 559 {
 560     scope_chain_t *scope;
 561     named_item_t *item;
 562     DISPID id = 0;
 563     HRESULT hres;
 564
 565     TRACE("%s\n", debugstr_w(identifier));
 566
 567     for(scope = ctx->exec_ctx->scope_chain; scope; scope = scope->next) {
 568         hres = jsdisp_get_id(scope->obj, identifier, 0, &id);
 569         if(SUCCEEDED(hres)) {
 570             exprval_set_idref(ret, to_disp(scope->obj), id);
 571             return S_OK;
 572         }
 573     }
 574
 575     hres = jsdisp_get_id(ctx->global, identifier, 0, &id);
 576     if(SUCCEEDED(hres)) {
 577         exprval_set_idref(ret, to_disp(ctx->global), id);
 578         return S_OK;
 579     }
 580
 581     for(item = ctx->named_items; item; item = item->next) {
 582         if((item->flags & SCRIPTITEM_ISVISIBLE) && !strcmpW(item->name, identifier)) {
 583             if(!item->disp) {
 584                 IUnknown *unk;
 585
 586                 if(!ctx->site)
 587                     break;
 588
 589                 hres = IActiveScriptSite_GetItemInfo(ctx->site, identifier,
 590                                                      SCRIPTINFO_IUNKNOWN, &unk, NULL);
 591                 if(FAILED(hres)) {
 592                     WARN("GetItemInfo failed: %08x\n", hres);
 593                     break;
 594                 }
 595
 596                 hres = IUnknown_QueryInterface(unk, &IID_IDispatch, (void**)&item->disp);
 597                 IUnknown_Release(unk);
 598                 if(FAILED(hres)) {
 599                     WARN("object does not implement IDispatch\n");
 600                     break;
 601                 }
 602             }
 603
 604             ret->type = EXPRVAL_VARIANT;
 605             V_VT(&ret->u.var) = VT_DISPATCH;
 606             V_DISPATCH(&ret->u.var) = item->disp;
 607             IDispatch_AddRef(item->disp);
 608             return S_OK;
 609         }
 610     }
 611
 612     if(lookup_global_members(ctx, identifier, ret))
 613         return S_OK;
 614
 615     if(flags & EXPR_NEWREF) {
 616         hres = jsdisp_get_id(ctx->global, identifier, fdexNameEnsure, &id);
 617         if(FAILED(hres))
 618             return hres;
 619
 620         exprval_set_idref(ret, to_disp(ctx->global), id);
 621         return S_OK;
 622     }
 623
 624     ret->type = EXPRVAL_INVALID;
 625     ret->u.identifier = SysAllocString(identifier);
 626     if(!ret->u.identifier)
 627         return E_OUTOFMEMORY;
 628
 629     return S_OK;
 630 }
 631
 632 /* ECMA-262 3rd Edition    12.1 */
 633 HRESULT block_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t *rt, VARIANT *ret)
 634 {
 635     block_statement_t *stat = (block_statement_t*)_stat;
 636     VARIANT val, tmp;
 637     statement_t *iter;
 638     HRESULT hres = S_OK;
 639
 640     TRACE("\n");
 641
 642     V_VT(&val) = VT_EMPTY;
 643     for(iter = stat->stat_list; iter; iter = iter->next) {
 644         hres = stat_eval(ctx, iter, rt, &tmp);
 645         if(FAILED(hres))
 646             break;
 647
 648         VariantClear(&val);
 649         val = tmp;
 650         if(rt->type != RT_NORMAL)
 651             break;
 652     }
 653
 654     if(FAILED(hres)) {
 655         VariantClear(&val);
 656         return hres;
 657     }
 658
 659     *ret = val;
 660     return S_OK;
 661 }
 662
 663 /* ECMA-262 3rd Edition    12.2 */
 664 static HRESULT variable_list_eval(script_ctx_t *ctx, variable_declaration_t *var_list, jsexcept_t *ei)
 665 {
 666     variable_declaration_t *iter;
 667     HRESULT hres = S_OK;
 668
 669     for(iter = var_list; iter; iter = iter->next) {
 670         exprval_t exprval;
 671         VARIANT val;
 672
 673         if(!iter->expr)
 674             continue;
 675
 676         hres = expr_eval(ctx, iter->expr, 0, ei, &exprval);
 677         if(FAILED(hres))
 678             break;
 679
 680         hres = exprval_to_value(ctx, &exprval, ei, &val);
 681         exprval_release(&exprval);
 682         if(FAILED(hres))
 683             break;
 684
 685         hres = jsdisp_propput_name(ctx->exec_ctx->var_disp, iter->identifier, &val, ei, NULL/*FIXME*/);
 686         VariantClear(&val);
 687         if(FAILED(hres))
 688             break;
 689     }
 690
 691     return hres;
 692 }
 693
 694 /* ECMA-262 3rd Edition    12.2 */
 695 HRESULT var_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t *rt, VARIANT *ret)
 696 {
 697     var_statement_t *stat = (var_statement_t*)_stat;
 698     HRESULT hres;
 699
 700     TRACE("\n");
 701
 702     hres = variable_list_eval(ctx, stat->variable_list, &rt->ei);
 703     if(FAILED(hres))
 704         return hres;
 705
 706     V_VT(ret) = VT_EMPTY;
 707     return S_OK;
 708 }
 709
 710 /* ECMA-262 3rd Edition    12.3 */
 711 HRESULT empty_statement_eval(script_ctx_t *ctx, statement_t *stat, return_type_t *rt, VARIANT *ret)
 712 {
 713     TRACE("\n");
 714
 715     V_VT(ret) = VT_EMPTY;
 716     return S_OK;
 717 }
 718
 719 /* ECMA-262 3rd Edition    12.4 */
 720 HRESULT expression_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t *rt, VARIANT *ret)
 721 {
 722     expression_statement_t *stat = (expression_statement_t*)_stat;
 723     exprval_t exprval;
 724     VARIANT val;
 725     HRESULT hres;
 726
 727     TRACE("\n");
 728
 729     hres = expr_eval(ctx, stat->expr, EXPR_NOVAL, &rt->ei, &exprval);
 730     if(FAILED(hres))
 731         return hres;
 732
 733     hres = exprval_to_value(ctx, &exprval, &rt->ei, &val);
 734     exprval_release(&exprval);
 735     if(FAILED(hres))
 736         return hres;
 737
 738     *ret = val;
 739     TRACE("= %s\n", debugstr_variant(ret));
 740     return S_OK;
 741 }
 742
 743 /* ECMA-262 3rd Edition    12.5 */
 744 HRESULT if_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t *rt, VARIANT *ret)
 745 {
 746     if_statement_t *stat = (if_statement_t*)_stat;
 747     exprval_t exprval;
 748     VARIANT_BOOL b;
 749     HRESULT hres;
 750
 751     TRACE("\n");
 752
 753     hres = expr_eval(ctx, stat->expr, 0, &rt->ei, &exprval);
 754     if(FAILED(hres))
 755         return hres;
 756
 757     hres = exprval_to_boolean(ctx, &exprval, &rt->ei, &b);
 758     exprval_release(&exprval);
 759     if(FAILED(hres))
 760         return hres;
 761
 762     if(b)
 763         hres = stat_eval(ctx, stat->if_stat, rt, ret);
 764     else if(stat->else_stat)
 765         hres = stat_eval(ctx, stat->else_stat, rt, ret);
 766     else
 767         V_VT(ret) = VT_EMPTY;
 768
 769     return hres;
 770 }
 771
 772 /* ECMA-262 3rd Edition    12.6.2 */
 773 HRESULT while_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t *rt, VARIANT *ret)
 774 {
 775     while_statement_t *stat = (while_statement_t*)_stat;
 776     exprval_t exprval;
 777     VARIANT val, tmp;
 778     VARIANT_BOOL b;
 779     BOOL test_expr;
 780     HRESULT hres;
 781
 782     TRACE("\n");
 783
 784     V_VT(&val) = VT_EMPTY;
 785     test_expr = !stat->do_while;
 786
 787     while(1) {
 788         if(test_expr) {
 789             hres = expr_eval(ctx, stat->expr, 0, &rt->ei, &exprval);
 790             if(FAILED(hres))
 791                 break;
 792
 793             hres = exprval_to_boolean(ctx, &exprval, &rt->ei, &b);
 794             exprval_release(&exprval);
 795             if(FAILED(hres) || !b)
 796                 break;
 797         }else {
 798             test_expr = TRUE;
 799         }
 800
 801         hres = stat_eval(ctx, stat->statement, rt, &tmp);
 802         if(FAILED(hres))
 803             break;
 804
 805         VariantClear(&val);
 806         val = tmp;
 807
 808         if(rt->type == RT_CONTINUE)
 809             rt->type = RT_NORMAL;
 810         if(rt->type != RT_NORMAL)
 811             break;
 812     }
 813
 814     if(FAILED(hres)) {
 815         VariantClear(&val);
 816         return hres;
 817     }
 818
 819     if(rt->type == RT_BREAK)
 820         rt->type = RT_NORMAL;
 821
 822     *ret = val;
 823     return S_OK;
 824 }
 825
 826 /* ECMA-262 3rd Edition    12.6.3 */
 827 HRESULT for_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t *rt, VARIANT *ret)
 828 {
 829     for_statement_t *stat = (for_statement_t*)_stat;
 830     VARIANT val, tmp, retv;
 831     exprval_t exprval;
 832     VARIANT_BOOL b;
 833     HRESULT hres;
 834
 835     TRACE("\n");
 836
 837     if(stat->variable_list) {
 838         hres = variable_list_eval(ctx, stat->variable_list, &rt->ei);
 839         if(FAILED(hres))
 840             return hres;
 841     }else if(stat->begin_expr) {
 842         hres = expr_eval(ctx, stat->begin_expr, EXPR_NEWREF, &rt->ei, &exprval);
 843         if(FAILED(hres))
 844             return hres;
 845
 846         hres = exprval_to_value(ctx, &exprval, &rt->ei, &val);
 847         exprval_release(&exprval);
 848         if(FAILED(hres))
 849             return hres;
 850
 851         VariantClear(&val);
 852     }
 853
 854     V_VT(&retv) = VT_EMPTY;
 855
 856     while(1) {
 857         if(stat->expr) {
 858             hres = expr_eval(ctx, stat->expr, 0, &rt->ei, &exprval);
 859             if(FAILED(hres))
 860                 break;
 861
 862             hres = exprval_to_boolean(ctx, &exprval, &rt->ei, &b);
 863             exprval_release(&exprval);
 864             if(FAILED(hres) || !b)
 865                 break;
 866         }
 867
 868         hres = stat_eval(ctx, stat->statement, rt, &tmp);
 869         if(FAILED(hres))
 870             break;
 871
 872         VariantClear(&retv);
 873         retv = tmp;
 874
 875         if(rt->type == RT_CONTINUE)
 876             rt->type = RT_NORMAL;
 877         else if(rt->type != RT_NORMAL)
 878             break;
 879
 880         if(stat->end_expr) {
 881             hres = expr_eval(ctx, stat->end_expr, 0, &rt->ei, &exprval);
 882             if(FAILED(hres))
 883                 break;
 884
 885             hres = exprval_to_value(ctx, &exprval, &rt->ei, &val);
 886             exprval_release(&exprval);
 887             if(FAILED(hres))
 888                 break;
 889
 890             VariantClear(&val);
 891         }
 892     }
 893
 894     if(FAILED(hres)) {
 895         VariantClear(&retv);
 896         return hres;
 897     }
 898
 899     if(rt->type == RT_BREAK)
 900         rt->type = RT_NORMAL;
 901
 902     *ret = retv;
 903     return S_OK;
 904 }
 905
 906 /* ECMA-262 3rd Edition    12.6.4 */
 907 HRESULT forin_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t *rt, VARIANT *ret)
 908 {
 909     forin_statement_t *stat = (forin_statement_t*)_stat;
 910     VARIANT val, name, retv, tmp;
 911     DISPID id = DISPID_STARTENUM;
 912     BSTR str, identifier = NULL;
 913     IDispatchEx *in_obj;
 914     exprval_t exprval;
 915     HRESULT hres;
 916
 917     TRACE("\n");
 918
 919     if(stat->variable) {
 920         hres = variable_list_eval(ctx, stat->variable, &rt->ei);
 921         if(FAILED(hres))
 922             return hres;
 923     }
 924
 925     hres = expr_eval(ctx, stat->in_expr, EXPR_NEWREF, &rt->ei, &exprval);
 926     if(FAILED(hres))
 927         return hres;
 928
 929     hres = exprval_to_value(ctx, &exprval, &rt->ei, &val);
 930     exprval_release(&exprval);
 931     if(FAILED(hres))
 932         return hres;
 933
 934     if(V_VT(&val) != VT_DISPATCH) {
 935         TRACE("in vt %d\n", V_VT(&val));
 936         VariantClear(&val);
 937         V_VT(ret) = VT_EMPTY;
 938         return S_OK;
 939     }
 940
 941     hres = IDispatch_QueryInterface(V_DISPATCH(&val), &IID_IDispatchEx, (void**)&in_obj);
 942     IDispatch_Release(V_DISPATCH(&val));
 943     if(FAILED(hres)) {
 944         TRACE("Object doesn't support IDispatchEx\n");
 945         V_VT(ret) = VT_EMPTY;
 946         return S_OK;
 947     }
 948
 949     V_VT(&retv) = VT_EMPTY;
 950
 951     if(stat->variable)
 952         identifier = SysAllocString(stat->variable->identifier);
 953
 954     while(1) {
 955         hres = IDispatchEx_GetNextDispID(in_obj, fdexEnumDefault, id, &id);
 956         if(FAILED(hres) || hres == S_FALSE)
 957             break;
 958
 959         hres = IDispatchEx_GetMemberName(in_obj, id, &str);
 960         if(FAILED(hres))
 961             break;
 962
 963         TRACE("iter %s\n", debugstr_w(str));
 964
 965         if(stat->variable)
 966             hres = identifier_eval(ctx, identifier, 0, NULL, &exprval);
 967         else
 968             hres = expr_eval(ctx, stat->expr, EXPR_NEWREF, &rt->ei, &exprval);
 969         if(SUCCEEDED(hres)) {
 970             V_VT(&name) = VT_BSTR;
 971             V_BSTR(&name) = str;
 972             hres = put_value(ctx, &exprval, &name, &rt->ei);
 973             exprval_release(&exprval);
 974         }
 975         SysFreeString(str);
 976         if(FAILED(hres))
 977             break;
 978
 979         hres = stat_eval(ctx, stat->statement, rt, &tmp);
 980         if(FAILED(hres))
 981             break;
 982
 983         VariantClear(&retv);
 984         retv = tmp;
 985
 986         if(rt->type == RT_CONTINUE)
 987             rt->type = RT_NORMAL;
 988         else if(rt->type != RT_NORMAL)
 989             break;
 990     }
 991
 992     SysFreeString(identifier);
 993     IDispatchEx_Release(in_obj);
 994     if(FAILED(hres)) {
 995         VariantClear(&retv);
 996         return hres;
 997     }
 998
 999     if(rt->type == RT_BREAK)
1000         rt->type = RT_NORMAL;
1001
1002     *ret = retv;
1003     return S_OK;
1004 }
1005
1006 /* ECMA-262 3rd Edition    12.7 */
1007 HRESULT continue_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t *rt, VARIANT *ret)
1008 {
1009     branch_statement_t *stat = (branch_statement_t*)_stat;
1010
1011     TRACE("\n");
1012
1013     if(stat->identifier) {
1014         FIXME("indentifier not implemented\n");
1015         return E_NOTIMPL;
1016     }
1017
1018     rt->type = RT_CONTINUE;
1019     V_VT(ret) = VT_EMPTY;
1020     return S_OK;
1021 }
1022
1023 /* ECMA-262 3rd Edition    12.8 */
1024 HRESULT break_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t *rt, VARIANT *ret)
1025 {
1026     branch_statement_t *stat = (branch_statement_t*)_stat;
1027
1028     TRACE("\n");
1029
1030     if(stat->identifier) {
1031         FIXME("indentifier not implemented\n");
1032         return E_NOTIMPL;
1033     }
1034
1035     rt->type = RT_BREAK;
1036     V_VT(ret) = VT_EMPTY;
1037     return S_OK;
1038 }
1039
1040 /* ECMA-262 3rd Edition    12.9 */
1041 HRESULT return_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t *rt, VARIANT *ret)
1042 {
1043     expression_statement_t *stat = (expression_statement_t*)_stat;
1044     HRESULT hres;
1045
1046     TRACE("\n");
1047
1048     if(stat->expr) {
1049         exprval_t exprval;
1050
1051         hres = expr_eval(ctx, stat->expr, 0, &rt->ei, &exprval);
1052         if(FAILED(hres))
1053             return hres;
1054
1055         hres = exprval_to_value(ctx, &exprval, &rt->ei, ret);
1056         exprval_release(&exprval);
1057         if(FAILED(hres))
1058             return hres;
1059     }else {
1060         V_VT(ret) = VT_EMPTY;
1061     }
1062
1063     TRACE("= %s\n", debugstr_variant(ret));
1064     rt->type = RT_RETURN;
1065     return S_OK;
1066 }
1067
1068 /* ECMA-262 3rd Edition    12.10 */
1069 HRESULT with_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t *rt, VARIANT *ret)
1070 {
1071     with_statement_t *stat = (with_statement_t*)_stat;
1072     exprval_t exprval;
1073     IDispatch *disp;
1074     jsdisp_t *obj;
1075     VARIANT val;
1076     HRESULT hres;
1077
1078     TRACE("\n");
1079
1080     hres = expr_eval(ctx, stat->expr, 0, &rt->ei, &exprval);
1081     if(FAILED(hres))
1082         return hres;
1083
1084     hres = exprval_to_value(ctx, &exprval, &rt->ei, &val);
1085     exprval_release(&exprval);
1086     if(FAILED(hres))
1087         return hres;
1088
1089     hres = to_object(ctx, &val, &disp);
1090     VariantClear(&val);
1091     if(FAILED(hres))
1092         return hres;
1093
1094     obj = iface_to_jsdisp((IUnknown*)disp);
1095     IDispatch_Release(disp);
1096     if(!obj) {
1097         FIXME("disp id not jsdisp\n");
1098         return E_NOTIMPL;
1099     }
1100
1101     hres = scope_push(ctx->exec_ctx->scope_chain, obj, &ctx->exec_ctx->scope_chain);
1102     jsdisp_release(obj);
1103     if(FAILED(hres))
1104         return hres;
1105
1106     hres = stat_eval(ctx, stat->statement, rt, ret);
1107
1108     scope_pop(&ctx->exec_ctx->scope_chain);
1109     return hres;
1110 }
1111
1112 /* ECMA-262 3rd Edition    12.12 */
1113 HRESULT labelled_statement_eval(script_ctx_t *ctx, statement_t *stat, return_type_t *rt, VARIANT *ret)
1114 {
1115     FIXME("\n");
1116     return E_NOTIMPL;
1117 }
1118
1119 /* ECMA-262 3rd Edition    12.13 */
1120 HRESULT switch_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t *rt, VARIANT *ret)
1121 {
1122     switch_statement_t *stat = (switch_statement_t*)_stat;
1123     case_clausule_t *iter, *default_clausule = NULL;
1124     statement_t *stat_iter;
1125     VARIANT val, cval;
1126     exprval_t exprval;
1127     BOOL b;
1128     HRESULT hres;
1129
1130     TRACE("\n");
1131
1132     hres = expr_eval(ctx, stat->expr, 0, &rt->ei, &exprval);
1133     if(FAILED(hres))
1134         return hres;
1135
1136     hres = exprval_to_value(ctx, &exprval, &rt->ei, &val);
1137     exprval_release(&exprval);
1138     if(FAILED(hres))
1139         return hres;
1140
1141     for(iter = stat->case_list; iter; iter = iter->next) {
1142         if(!iter->expr) {
1143             default_clausule = iter;
1144             continue;
1145         }
1146
1147         hres = expr_eval(ctx, iter->expr, 0, &rt->ei, &exprval);
1148         if(FAILED(hres))
1149             break;
1150
1151         hres = exprval_to_value(ctx, &exprval, &rt->ei, &cval);
1152         exprval_release(&exprval);
1153         if(FAILED(hres))
1154             break;
1155
1156         hres = equal2_values(&val, &cval, &b);
1157         VariantClear(&cval);
1158         if(FAILED(hres) || b)
1159             break;
1160     }
1161
1162     VariantClear(&val);
1163     if(FAILED(hres))
1164         return hres;
1165
1166     if(!iter)
1167         iter = default_clausule;
1168
1169     V_VT(&val) = VT_EMPTY;
1170     if(iter) {
1171         VARIANT tmp;
1172
1173         for(stat_iter = iter->stat; stat_iter; stat_iter = stat_iter->next) {
1174             hres = stat_eval(ctx, stat_iter, rt, &tmp);
1175             if(FAILED(hres))
1176                 break;
1177
1178             VariantClear(&val);
1179             val = tmp;
1180
1181             if(rt->type != RT_NORMAL)
1182                 break;
1183         }
1184     }
1185
1186     if(FAILED(hres)) {
1187         VariantClear(&val);
1188         return hres;
1189     }
1190
1191     if(rt->type == RT_BREAK)
1192         rt->type = RT_NORMAL;
1193
1194     *ret = val;
1195     return S_OK;
1196 }
1197
1198 /* ECMA-262 3rd Edition    12.13 */
1199 HRESULT throw_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t *rt, VARIANT *ret)
1200 {
1201     expression_statement_t *stat = (expression_statement_t*)_stat;
1202     exprval_t exprval;
1203     VARIANT val;
1204     HRESULT hres;
1205
1206     TRACE("\n");
1207
1208     hres = expr_eval(ctx, stat->expr, 0, &rt->ei, &exprval);
1209     if(FAILED(hres))
1210         return hres;
1211
1212     hres = exprval_to_value(ctx, &exprval, &rt->ei, &val);
1213     exprval_release(&exprval);
1214     if(FAILED(hres))
1215         return hres;
1216
1217     rt->ei.var = val;
1218     return DISP_E_EXCEPTION;
1219 }
1220
1221 /* ECMA-262 3rd Edition    12.14 */
1222 static HRESULT catch_eval(script_ctx_t *ctx, catch_block_t *block, return_type_t *rt, VARIANT *ret)
1223 {
1224     jsdisp_t *var_disp;
1225     VARIANT ex, val;
1226     HRESULT hres;
1227
1228     ex = rt->ei.var;
1229     memset(&rt->ei, 0, sizeof(jsexcept_t));
1230
1231     hres = create_dispex(ctx, NULL, NULL, &var_disp);
1232     if(SUCCEEDED(hres)) {
1233         hres = jsdisp_propput_name(var_disp, block->identifier, &ex, &rt->ei, NULL/*FIXME*/);
1234         if(SUCCEEDED(hres)) {
1235             hres = scope_push(ctx->exec_ctx->scope_chain, var_disp, &ctx->exec_ctx->scope_chain);
1236             if(SUCCEEDED(hres)) {
1237                 hres = stat_eval(ctx, block->statement, rt, &val);
1238                 scope_pop(&ctx->exec_ctx->scope_chain);
1239             }
1240         }
1241
1242         jsdisp_release(var_disp);
1243     }
1244
1245     VariantClear(&ex);
1246     if(FAILED(hres))
1247         return hres;
1248
1249     *ret = val;
1250     return S_OK;
1251 }
1252
1253 /* ECMA-262 3rd Edition    12.14 */
1254 HRESULT try_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t *rt, VARIANT *ret)
1255 {
1256     try_statement_t *stat = (try_statement_t*)_stat;
1257     VARIANT val;
1258     HRESULT hres;
1259
1260     TRACE("\n");
1261
1262     hres = stat_eval(ctx, stat->try_statement, rt, &val);
1263     if(FAILED(hres)) {
1264         TRACE("EXCEPTION\n");
1265         if(!stat->catch_block)
1266             return hres;
1267
1268         hres = catch_eval(ctx, stat->catch_block, rt, &val);
1269         if(FAILED(hres))
1270             return hres;
1271     }
1272
1273     if(stat->finally_statement) {
1274         VariantClear(&val);
1275         hres = stat_eval(ctx, stat->finally_statement, rt, &val);
1276         if(FAILED(hres))
1277             return hres;
1278     }
1279
1280     *ret = val;
1281     return S_OK;
1282 }
1283
1284 static HRESULT return_bool(exprval_t *ret, DWORD b)
1285 {
1286     ret->type = EXPRVAL_VARIANT;
1287     V_VT(&ret->u.var) = VT_BOOL;
1288     V_BOOL(&ret->u.var) = b ? VARIANT_TRUE : VARIANT_FALSE;
1289
1290     return S_OK;
1291 }
1292
1293 static HRESULT get_binary_expr_values(script_ctx_t *ctx, binary_expression_t *expr, jsexcept_t *ei, VARIANT *lval, VARIANT *rval)
1294 {
1295     exprval_t exprval;
1296     HRESULT hres;
1297
1298     hres = expr_eval(ctx, expr->expression1, 0, ei, &exprval);
1299     if(FAILED(hres))
1300         return hres;
1301
1302     hres = exprval_to_value(ctx, &exprval, ei, lval);
1303     exprval_release(&exprval);
1304     if(FAILED(hres))
1305         return hres;
1306
1307     hres = expr_eval(ctx, expr->expression2, 0, ei, &exprval);
1308     if(SUCCEEDED(hres)) {
1309         hres = exprval_to_value(ctx, &exprval, ei, rval);
1310         exprval_release(&exprval);
1311     }
1312
1313     if(FAILED(hres)) {
1314         VariantClear(lval);
1315         return hres;
1316     }
1317
1318     return S_OK;
1319 }
1320
1321 typedef HRESULT (*oper_t)(script_ctx_t*,VARIANT*,VARIANT*,jsexcept_t*,VARIANT*);
1322
1323 static HRESULT binary_expr_eval(script_ctx_t *ctx, binary_expression_t *expr, oper_t oper, jsexcept_t *ei,
1324         exprval_t *ret)
1325 {
1326     VARIANT lval, rval, retv;
1327     HRESULT hres;
1328
1329     hres = get_binary_expr_values(ctx, expr, ei, &lval, &rval);
1330     if(FAILED(hres))
1331         return hres;
1332
1333     hres = oper(ctx, &lval, &rval, ei, &retv);
1334     VariantClear(&lval);
1335     VariantClear(&rval);
1336     if(FAILED(hres))
1337         return hres;
1338
1339     ret->type = EXPRVAL_VARIANT;
1340     ret->u.var = retv;
1341     return S_OK;
1342 }
1343
1344 /* ECMA-262 3rd Edition    11.13.2 */
1345 static HRESULT assign_oper_eval(script_ctx_t *ctx, expression_t *lexpr, expression_t *rexpr, oper_t oper,
1346                                 jsexcept_t *ei, exprval_t *ret)
1347 {
1348     VARIANT retv, lval, rval;
1349     exprval_t exprval, exprvalr;
1350     HRESULT hres;
1351
1352     hres = expr_eval(ctx, lexpr, EXPR_NEWREF, ei, &exprval);
1353     if(FAILED(hres))
1354         return hres;
1355
1356     hres = exprval_value(ctx, &exprval, ei, &lval);
1357     if(SUCCEEDED(hres)) {
1358         hres = expr_eval(ctx, rexpr, 0, ei, &exprvalr);
1359         if(SUCCEEDED(hres)) {
1360             hres = exprval_value(ctx, &exprvalr, ei, &rval);
1361             exprval_release(&exprvalr);
1362         }
1363         if(SUCCEEDED(hres)) {
1364             hres = oper(ctx, &lval, &rval, ei, &retv);
1365             VariantClear(&rval);
1366         }
1367         VariantClear(&lval);
1368     }
1369
1370     if(SUCCEEDED(hres)) {
1371         hres = put_value(ctx, &exprval, &retv, ei);
1372         if(FAILED(hres))
1373             VariantClear(&retv);
1374     }
1375     exprval_release(&exprval);
1376
1377     if(FAILED(hres))
1378         return hres;
1379
1380     ret->type = EXPRVAL_VARIANT;
1381     ret->u.var = retv;
1382     return S_OK;
1383 }
1384
1385 /* ECMA-262 3rd Edition    13 */
1386 HRESULT function_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1387 {
1388     function_expression_t *expr = (function_expression_t*)_expr;
1389     VARIANT var;
1390     HRESULT hres;
1391
1392     TRACE("\n");
1393
1394     if(expr->identifier) {
1395         hres = jsdisp_propget_name(ctx->exec_ctx->var_disp, expr->identifier, &var, ei, NULL/*FIXME*/);
1396         if(FAILED(hres))
1397             return hres;
1398     }else {
1399         jsdisp_t *dispex;
1400
1401         hres = create_source_function(ctx->exec_ctx->parser, expr->parameter_list, expr->source_elements, ctx->exec_ctx->scope_chain,
1402                 expr->src_str, expr->src_len, &dispex);
1403         if(FAILED(hres))
1404             return hres;
1405
1406         var_set_jsdisp(&var, dispex);
1407     }
1408
1409     ret->type = EXPRVAL_VARIANT;
1410     ret->u.var = var;
1411     return S_OK;
1412 }
1413
1414 /* ECMA-262 3rd Edition    11.12 */
1415 HRESULT conditional_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1416 {
1417     conditional_expression_t *expr = (conditional_expression_t*)_expr;
1418     exprval_t exprval;
1419     VARIANT_BOOL b;
1420     HRESULT hres;
1421
1422     TRACE("\n");
1423
1424     hres = expr_eval(ctx, expr->expression, 0, ei, &exprval);
1425     if(FAILED(hres))
1426         return hres;
1427
1428     hres = exprval_to_boolean(ctx, &exprval, ei, &b);
1429     exprval_release(&exprval);
1430     if(FAILED(hres))
1431         return hres;
1432
1433     return expr_eval(ctx, b ? expr->true_expression : expr->false_expression, flags, ei, ret);
1434 }
1435
1436 /* ECMA-262 3rd Edition    11.2.1 */
1437 HRESULT array_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1438 {
1439     array_expression_t *expr = (array_expression_t*)_expr;
1440     exprval_t exprval;
1441     VARIANT member, val;
1442     DISPID id;
1443     BSTR str;
1444     IDispatch *obj = NULL;
1445     HRESULT hres;
1446
1447     TRACE("\n");
1448
1449     hres = expr_eval(ctx, expr->member_expr, 0, ei, &exprval);
1450     if(FAILED(hres))
1451         return hres;
1452
1453     hres = exprval_to_value(ctx, &exprval, ei, &member);
1454     exprval_release(&exprval);
1455     if(FAILED(hres))
1456         return hres;
1457
1458     hres = expr_eval(ctx, expr->expression, EXPR_NEWREF, ei, &exprval);
1459     if(SUCCEEDED(hres)) {
1460         hres = exprval_to_value(ctx, &exprval, ei, &val);
1461         exprval_release(&exprval);
1462     }
1463
1464     if(SUCCEEDED(hres)) {
1465         hres = to_object(ctx, &member, &obj);
1466         if(FAILED(hres))
1467             VariantClear(&val);
1468     }
1469     VariantClear(&member);
1470     if(SUCCEEDED(hres)) {
1471         hres = to_string(ctx, &val, ei, &str);
1472         VariantClear(&val);
1473         if(SUCCEEDED(hres)) {
1474             if(flags & EXPR_STRREF) {
1475                 ret->type = EXPRVAL_NAMEREF;
1476                 ret->u.nameref.disp = obj;
1477                 ret->u.nameref.name = str;
1478                 return S_OK;
1479             }
1480
1481             hres = disp_get_id(ctx, obj, str, flags & EXPR_NEWREF ? fdexNameEnsure : 0, &id);
1482             SysFreeString(str);
1483         }
1484
1485         if(SUCCEEDED(hres)) {
1486             exprval_set_idref(ret, obj, id);
1487         }else if(!(flags & EXPR_NEWREF) && hres == DISP_E_UNKNOWNNAME) {
1488             exprval_init(ret);
1489             hres = S_OK;
1490         }
1491
1492         IDispatch_Release(obj);
1493     }
1494
1495     return hres;
1496 }
1497
1498 /* ECMA-262 3rd Edition    11.2.1 */
1499 HRESULT member_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1500 {
1501     member_expression_t *expr = (member_expression_t*)_expr;
1502     IDispatch *obj = NULL;
1503     exprval_t exprval;
1504     VARIANT member;
1505     DISPID id;
1506     BSTR str;
1507     HRESULT hres;
1508
1509     TRACE("\n");
1510
1511     hres = expr_eval(ctx, expr->expression, 0, ei, &exprval);
1512     if(FAILED(hres))
1513         return hres;
1514
1515     hres = exprval_to_value(ctx, &exprval, ei, &member);
1516     exprval_release(&exprval);
1517     if(FAILED(hres))
1518         return hres;
1519
1520     hres = to_object(ctx, &member, &obj);
1521     VariantClear(&member);
1522     if(FAILED(hres))
1523         return hres;
1524
1525     str = SysAllocString(expr->identifier);
1526     if(flags & EXPR_STRREF) {
1527         ret->type = EXPRVAL_NAMEREF;
1528         ret->u.nameref.disp = obj;
1529         ret->u.nameref.name = str;
1530         return S_OK;
1531     }
1532
1533     hres = disp_get_id(ctx, obj, str, flags & EXPR_NEWREF ? fdexNameEnsure : 0, &id);
1534     SysFreeString(str);
1535     if(SUCCEEDED(hres)) {
1536         exprval_set_idref(ret, obj, id);
1537     }else if(!(flags & EXPR_NEWREF) && hres == DISP_E_UNKNOWNNAME) {
1538         exprval_init(ret);
1539         hres = S_OK;
1540     }
1541
1542     IDispatch_Release(obj);
1543     return hres;
1544 }
1545
1546 static void free_dp(DISPPARAMS *dp)
1547 {
1548     DWORD i;
1549
1550     for(i=0; i < dp->cArgs; i++)
1551         VariantClear(dp->rgvarg+i);
1552     heap_free(dp->rgvarg);
1553 }
1554
1555 static HRESULT args_to_param(script_ctx_t *ctx, argument_t *args, jsexcept_t *ei, DISPPARAMS *dp)
1556 {
1557     VARIANTARG *vargs;
1558     exprval_t exprval;
1559     argument_t *iter;
1560     DWORD cnt = 0, i;
1561     HRESULT hres = S_OK;
1562
1563     memset(dp, 0, sizeof(*dp));
1564     if(!args)
1565         return S_OK;
1566
1567     for(iter = args; iter; iter = iter->next)
1568         cnt++;
1569
1570     vargs = heap_alloc_zero(cnt * sizeof(*vargs));
1571     if(!vargs)
1572         return E_OUTOFMEMORY;
1573
1574     for(i = cnt, iter = args; iter; iter = iter->next) {
1575         hres = expr_eval(ctx, iter->expr, 0, ei, &exprval);
1576         if(FAILED(hres))
1577             break;
1578
1579         hres = exprval_to_value(ctx, &exprval, ei, vargs + (--i));
1580         exprval_release(&exprval);
1581         if(FAILED(hres))
1582             break;
1583     }
1584
1585     if(FAILED(hres)) {
1586         free_dp(dp);
1587         return hres;
1588     }
1589
1590     dp->rgvarg = vargs;
1591     dp->cArgs = cnt;
1592     return S_OK;
1593 }
1594
1595 /* ECMA-262 3rd Edition    11.2.2 */
1596 HRESULT new_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1597 {
1598     call_expression_t *expr = (call_expression_t*)_expr;
1599     exprval_t exprval;
1600     VARIANT constr, var;
1601     DISPPARAMS dp;
1602     HRESULT hres;
1603
1604     TRACE("\n");
1605
1606     hres = expr_eval(ctx, expr->expression, 0, ei, &exprval);
1607     if(FAILED(hres))
1608         return hres;
1609
1610     hres = args_to_param(ctx, expr->argument_list, ei, &dp);
1611     if(SUCCEEDED(hres))
1612         hres = exprval_to_value(ctx, &exprval, ei, &constr);
1613     exprval_release(&exprval);
1614     if(FAILED(hres))
1615         return hres;
1616
1617     /* NOTE: Should use to_object here */
1618
1619     if(V_VT(&constr) == VT_NULL) {
1620         VariantClear(&constr);
1621         return throw_type_error(ctx, ei, JS_E_OBJECT_EXPECTED, NULL);
1622     } else if(V_VT(&constr) != VT_DISPATCH) {
1623         VariantClear(&constr);
1624         return throw_type_error(ctx, ei, JS_E_INVALID_ACTION, NULL);
1625     } else if(!V_DISPATCH(&constr)) {
1626         VariantClear(&constr);
1627         return throw_type_error(ctx, ei, JS_E_INVALID_PROPERTY, NULL);
1628     }
1629
1630     hres = disp_call(ctx, V_DISPATCH(&constr), DISPID_VALUE,
1631             DISPATCH_CONSTRUCT, &dp, &var, ei, NULL/*FIXME*/);
1632     IDispatch_Release(V_DISPATCH(&constr));
1633     free_dp(&dp);
1634     if(FAILED(hres))
1635         return hres;
1636
1637     ret->type = EXPRVAL_VARIANT;
1638     ret->u.var = var;
1639     return S_OK;
1640 }
1641
1642 /* ECMA-262 3rd Edition    11.2.3 */
1643 HRESULT call_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1644 {
1645     call_expression_t *expr = (call_expression_t*)_expr;
1646     VARIANT var;
1647     exprval_t exprval;
1648     DISPPARAMS dp;
1649     HRESULT hres;
1650
1651     TRACE("\n");
1652
1653     hres = expr_eval(ctx, expr->expression, 0, ei, &exprval);
1654     if(FAILED(hres))
1655         return hres;
1656
1657     hres = args_to_param(ctx, expr->argument_list, ei, &dp);
1658     if(SUCCEEDED(hres)) {
1659         switch(exprval.type) {
1660         case EXPRVAL_VARIANT:
1661             if(V_VT(&exprval.u.var) == VT_DISPATCH)
1662                 hres = disp_call(ctx, V_DISPATCH(&exprval.u.var), DISPID_VALUE,
1663                         DISPATCH_METHOD, &dp, flags & EXPR_NOVAL ? NULL : &var, ei, NULL/*FIXME*/);
1664             else
1665                 hres = throw_type_error(ctx, ei, JS_E_INVALID_PROPERTY, NULL);
1666             break;
1667         case EXPRVAL_IDREF:
1668             hres = disp_call(ctx, exprval.u.idref.disp, exprval.u.idref.id,
1669                     DISPATCH_METHOD, &dp, flags & EXPR_NOVAL ? NULL : &var, ei, NULL/*FIXME*/);
1670             break;
1671         case EXPRVAL_INVALID:
1672             hres = throw_type_error(ctx, ei, JS_E_OBJECT_EXPECTED, NULL);
1673             break;
1674         default:
1675             FIXME("unimplemented type %d\n", exprval.type);
1676             hres = E_NOTIMPL;
1677         }
1678
1679         free_dp(&dp);
1680     }
1681
1682     exprval_release(&exprval);
1683     if(FAILED(hres))
1684         return hres;
1685
1686     ret->type = EXPRVAL_VARIANT;
1687     if(flags & EXPR_NOVAL) {
1688         V_VT(&ret->u.var) = VT_EMPTY;
1689     }else {
1690         TRACE("= %s\n", debugstr_variant(&var));
1691         ret->u.var = var;
1692     }
1693     return S_OK;
1694 }
1695
1696 /* ECMA-262 3rd Edition    11.1.1 */
1697 HRESULT this_expression_eval(script_ctx_t *ctx, expression_t *expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1698 {
1699     TRACE("\n");
1700
1701     ret->type = EXPRVAL_VARIANT;
1702     V_VT(&ret->u.var) = VT_DISPATCH;
1703     V_DISPATCH(&ret->u.var) = ctx->exec_ctx->this_obj;
1704     IDispatch_AddRef(ctx->exec_ctx->this_obj);
1705     return S_OK;
1706 }
1707
1708 /* ECMA-262 3rd Edition    10.1.4 */
1709 HRESULT identifier_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1710 {
1711     identifier_expression_t *expr = (identifier_expression_t*)_expr;
1712     BSTR identifier;
1713     HRESULT hres;
1714
1715     TRACE("\n");
1716
1717     identifier = SysAllocString(expr->identifier);
1718     if(!identifier)
1719         return E_OUTOFMEMORY;
1720
1721     hres = identifier_eval(ctx, identifier, flags, ei, ret);
1722
1723     SysFreeString(identifier);
1724     return hres;
1725 }
1726
1727 /* ECMA-262 3rd Edition    7.8 */
1728 HRESULT literal_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1729 {
1730     literal_expression_t *expr = (literal_expression_t*)_expr;
1731     VARIANT var;
1732     HRESULT hres;
1733
1734     TRACE("\n");
1735
1736     hres = literal_to_var(ctx, expr->literal, &var);
1737     if(FAILED(hres))
1738         return hres;
1739
1740     ret->type = EXPRVAL_VARIANT;
1741     ret->u.var = var;
1742     return S_OK;
1743 }
1744
1745 /* ECMA-262 3rd Edition    11.1.4 */
1746 HRESULT array_literal_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1747 {
1748     array_literal_expression_t *expr = (array_literal_expression_t*)_expr;
1749     DWORD length = 0, i = 0;
1750     array_element_t *elem;
1751     jsdisp_t *array;
1752     exprval_t exprval;
1753     VARIANT val;
1754     HRESULT hres;
1755
1756     TRACE("\n");
1757
1758     for(elem = expr->element_list; elem; elem = elem->next)
1759         length += elem->elision+1;
1760     length += expr->length;
1761
1762     hres = create_array(ctx, length, &array);
1763     if(FAILED(hres))
1764         return hres;
1765
1766     for(elem = expr->element_list; elem; elem = elem->next) {
1767         i += elem->elision;
1768
1769         hres = expr_eval(ctx, elem->expr, 0, ei, &exprval);
1770         if(FAILED(hres))
1771             break;
1772
1773         hres = exprval_to_value(ctx, &exprval, ei, &val);
1774         exprval_release(&exprval);
1775         if(FAILED(hres))
1776             break;
1777
1778         hres = jsdisp_propput_idx(array, i, &val, ei, NULL/*FIXME*/);
1779         VariantClear(&val);
1780         if(FAILED(hres))
1781             break;
1782
1783         i++;
1784     }
1785
1786     if(FAILED(hres)) {
1787         jsdisp_release(array);
1788         return hres;
1789     }
1790
1791     ret->type = EXPRVAL_VARIANT;
1792     var_set_jsdisp(&ret->u.var, array);
1793     return S_OK;
1794 }
1795
1796 /* ECMA-262 3rd Edition    11.1.5 */
1797 HRESULT property_value_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1798 {
1799     property_value_expression_t *expr = (property_value_expression_t*)_expr;
1800     VARIANT val, tmp;
1801     jsdisp_t *obj;
1802     prop_val_t *iter;
1803     exprval_t exprval;
1804     BSTR name;
1805     HRESULT hres;
1806
1807     TRACE("\n");
1808
1809     hres = create_object(ctx, NULL, &obj);
1810     if(FAILED(hres))
1811         return hres;
1812
1813     for(iter = expr->property_list; iter; iter = iter->next) {
1814         hres = literal_to_var(ctx, iter->name, &tmp);
1815         if(FAILED(hres))
1816             break;
1817
1818         hres = to_string(ctx, &tmp, ei, &name);
1819         VariantClear(&tmp);
1820         if(FAILED(hres))
1821             break;
1822
1823         hres = expr_eval(ctx, iter->value, 0, ei, &exprval);
1824         if(SUCCEEDED(hres)) {
1825             hres = exprval_to_value(ctx, &exprval, ei, &val);
1826             exprval_release(&exprval);
1827             if(SUCCEEDED(hres)) {
1828                 hres = jsdisp_propput_name(obj, name, &val, ei, NULL/*FIXME*/);
1829                 VariantClear(&val);
1830             }
1831         }
1832
1833         SysFreeString(name);
1834         if(FAILED(hres))
1835             break;
1836     }
1837
1838     if(FAILED(hres)) {
1839         jsdisp_release(obj);
1840         return hres;
1841     }
1842
1843     ret->type = EXPRVAL_VARIANT;
1844     var_set_jsdisp(&ret->u.var, obj);
1845     return S_OK;
1846 }
1847
1848 /* ECMA-262 3rd Edition    11.14 */
1849 HRESULT comma_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1850 {
1851     binary_expression_t *expr = (binary_expression_t*)_expr;
1852     VARIANT lval, rval;
1853     HRESULT hres;
1854
1855     TRACE("\n");
1856
1857     hres = get_binary_expr_values(ctx, expr, ei, &lval, &rval);
1858     if(FAILED(hres))
1859         return hres;
1860
1861     VariantClear(&lval);
1862
1863     ret->type = EXPRVAL_VARIANT;
1864     ret->u.var = rval;
1865     return S_OK;
1866 }
1867
1868 /* ECMA-262 3rd Edition    11.11 */
1869 HRESULT logical_or_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1870 {
1871     binary_expression_t *expr = (binary_expression_t*)_expr;
1872     exprval_t exprval;
1873     VARIANT_BOOL b;
1874     VARIANT val;
1875     HRESULT hres;
1876
1877     TRACE("\n");
1878
1879     hres = expr_eval(ctx, expr->expression1, 0, ei, &exprval);
1880     if(FAILED(hres))
1881         return hres;
1882
1883     hres = exprval_to_value(ctx, &exprval, ei, &val);
1884     exprval_release(&exprval);
1885     if(FAILED(hres))
1886         return hres;
1887
1888     hres = to_boolean(&val, &b);
1889     if(SUCCEEDED(hres) && b) {
1890         ret->type = EXPRVAL_VARIANT;
1891         ret->u.var = val;
1892         return S_OK;
1893     }
1894
1895     VariantClear(&val);
1896     if(FAILED(hres))
1897         return hres;
1898
1899     hres = expr_eval(ctx, expr->expression2, 0, ei, &exprval);
1900     if(FAILED(hres))
1901         return hres;
1902
1903     hres = exprval_to_value(ctx, &exprval, ei, &val);
1904     exprval_release(&exprval);
1905     if(FAILED(hres))
1906         return hres;
1907
1908     ret->type = EXPRVAL_VARIANT;
1909     ret->u.var = val;
1910     return S_OK;
1911 }
1912
1913 /* ECMA-262 3rd Edition    11.11 */
1914 HRESULT logical_and_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1915 {
1916     binary_expression_t *expr = (binary_expression_t*)_expr;
1917     exprval_t exprval;
1918     VARIANT_BOOL b;
1919     VARIANT val;
1920     HRESULT hres;
1921
1922     TRACE("\n");
1923
1924     hres = expr_eval(ctx, expr->expression1, 0, ei, &exprval);
1925     if(FAILED(hres))
1926         return hres;
1927
1928     hres = exprval_to_value(ctx, &exprval, ei, &val);
1929     exprval_release(&exprval);
1930     if(FAILED(hres))
1931         return hres;
1932
1933     hres = to_boolean(&val, &b);
1934     if(SUCCEEDED(hres) && !b) {
1935         ret->type = EXPRVAL_VARIANT;
1936         ret->u.var = val;
1937         return S_OK;
1938     }
1939
1940     VariantClear(&val);
1941     if(FAILED(hres))
1942         return hres;
1943
1944     hres = expr_eval(ctx, expr->expression2, 0, ei, &exprval);
1945     if(FAILED(hres))
1946         return hres;
1947
1948     hres = exprval_to_value(ctx, &exprval, ei, &val);
1949     exprval_release(&exprval);
1950     if(FAILED(hres))
1951         return hres;
1952
1953     ret->type = EXPRVAL_VARIANT;
1954     ret->u.var = val;
1955     return S_OK;
1956 }
1957
1958 /* ECMA-262 3rd Edition    11.10 */
1959 static HRESULT bitor_eval(script_ctx_t *ctx, VARIANT *lval, VARIANT *rval, jsexcept_t *ei, VARIANT *retv)
1960 {
1961     INT li, ri;
1962     HRESULT hres;
1963
1964     hres = to_int32(ctx, lval, ei, &li);
1965     if(FAILED(hres))
1966         return hres;
1967
1968     hres = to_int32(ctx, rval, ei, &ri);
1969     if(FAILED(hres))
1970         return hres;
1971
1972     V_VT(retv) = VT_I4;
1973     V_I4(retv) = li|ri;
1974     return S_OK;
1975 }
1976
1977 /* ECMA-262 3rd Edition    11.10 */
1978 HRESULT binary_or_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
1979 {
1980     binary_expression_t *expr = (binary_expression_t*)_expr;
1981
1982     TRACE("\n");
1983
1984     return binary_expr_eval(ctx, expr, bitor_eval, ei, ret);
1985 }
1986
1987 /* ECMA-262 3rd Edition    11.10 */
1988 static HRESULT xor_eval(script_ctx_t *ctx, VARIANT *lval, VARIANT *rval, jsexcept_t *ei, VARIANT *retv)
1989 {
1990     INT li, ri;
1991     HRESULT hres;
1992
1993     hres = to_int32(ctx, lval, ei, &li);
1994     if(FAILED(hres))
1995         return hres;
1996
1997     hres = to_int32(ctx, rval, ei, &ri);
1998     if(FAILED(hres))
1999         return hres;
2000
2001     V_VT(retv) = VT_I4;
2002     V_I4(retv) = li^ri;
2003     return S_OK;
2004 }
2005
2006 /* ECMA-262 3rd Edition    11.10 */
2007 HRESULT binary_xor_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2008 {
2009     binary_expression_t *expr = (binary_expression_t*)_expr;
2010
2011     TRACE("\n");
2012
2013     return binary_expr_eval(ctx, expr, xor_eval, ei, ret);
2014 }
2015
2016 /* ECMA-262 3rd Edition    11.10 */
2017 static HRESULT bitand_eval(script_ctx_t *ctx, VARIANT *lval, VARIANT *rval, jsexcept_t *ei, VARIANT *retv)
2018 {
2019     INT li, ri;
2020     HRESULT hres;
2021
2022     hres = to_int32(ctx, lval, ei, &li);
2023     if(FAILED(hres))
2024         return hres;
2025
2026     hres = to_int32(ctx, rval, ei, &ri);
2027     if(FAILED(hres))
2028         return hres;
2029
2030     V_VT(retv) = VT_I4;
2031     V_I4(retv) = li&ri;
2032     return S_OK;
2033 }
2034
2035 /* ECMA-262 3rd Edition    11.10 */
2036 HRESULT binary_and_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2037 {
2038     binary_expression_t *expr = (binary_expression_t*)_expr;
2039
2040     TRACE("\n");
2041
2042     return binary_expr_eval(ctx, expr, bitand_eval, ei, ret);
2043 }
2044
2045 /* ECMA-262 3rd Edition    11.8.6 */
2046 static HRESULT instanceof_eval(script_ctx_t *ctx, VARIANT *inst, VARIANT *objv, jsexcept_t *ei, VARIANT *retv)
2047 {
2048     jsdisp_t *obj, *iter, *tmp = NULL;
2049     VARIANT_BOOL ret = VARIANT_FALSE;
2050     BOOL b;
2051     VARIANT var;
2052     HRESULT hres;
2053
2054     static const WCHAR prototypeW[] = {'p','r','o','t','o','t', 'y', 'p','e',0};
2055
2056     if(V_VT(objv) != VT_DISPATCH || !V_DISPATCH(objv))
2057         return throw_type_error(ctx, ei, JS_E_FUNCTION_EXPECTED, NULL);
2058
2059     obj = iface_to_jsdisp((IUnknown*)V_DISPATCH(objv));
2060     if(!obj) {
2061         FIXME("non-jsdisp objects not supported\n");
2062         return E_FAIL;
2063     }
2064
2065     if(is_class(obj, JSCLASS_FUNCTION)) {
2066         hres = jsdisp_propget_name(obj, prototypeW, &var, ei, NULL/*FIXME*/);
2067     }else {
2068         hres = throw_type_error(ctx, ei, JS_E_FUNCTION_EXPECTED, NULL);
2069     }
2070     jsdisp_release(obj);
2071     if(FAILED(hres))
2072         return hres;
2073
2074     if(V_VT(&var) == VT_DISPATCH) {
2075         if(V_VT(inst) == VT_DISPATCH)
2076             tmp = iface_to_jsdisp((IUnknown*)V_DISPATCH(inst));
2077         for(iter = tmp; iter; iter = iter->prototype) {
2078             hres = disp_cmp(V_DISPATCH(&var), to_disp(iter), &b);
2079             if(FAILED(hres))
2080                 break;
2081             if(b) {
2082                 ret = VARIANT_TRUE;
2083                 break;
2084             }
2085         }
2086
2087         if(tmp)
2088             jsdisp_release(tmp);
2089     }else {
2090         FIXME("prototype is not an object\n");
2091         hres = E_FAIL;
2092     }
2093
2094     VariantClear(&var);
2095     if(FAILED(hres))
2096         return hres;
2097
2098     V_VT(retv) = VT_BOOL;
2099     V_BOOL(retv) = ret;
2100     return S_OK;
2101 }
2102
2103 /* ECMA-262 3rd Edition    11.8.6 */
2104 HRESULT instanceof_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2105 {
2106     binary_expression_t *expr = (binary_expression_t*)_expr;
2107
2108     TRACE("\n");
2109
2110     return binary_expr_eval(ctx, expr, instanceof_eval, ei, ret);
2111 }
2112
2113 /* ECMA-262 3rd Edition    11.8.7 */
2114 static HRESULT in_eval(script_ctx_t *ctx, VARIANT *lval, VARIANT *obj, jsexcept_t *ei, VARIANT *retv)
2115 {
2116     VARIANT_BOOL ret;
2117     DISPID id;
2118     BSTR str;
2119     HRESULT hres;
2120
2121     if(V_VT(obj) != VT_DISPATCH || !V_DISPATCH(obj))
2122         return throw_type_error(ctx, ei, JS_E_OBJECT_EXPECTED, NULL);
2123
2124     hres = to_string(ctx, lval, ei, &str);
2125     if(FAILED(hres))
2126         return hres;
2127
2128     hres = disp_get_id(ctx, V_DISPATCH(obj), str, 0, &id);
2129     SysFreeString(str);
2130     if(SUCCEEDED(hres))
2131         ret = VARIANT_TRUE;
2132     else if(hres == DISP_E_UNKNOWNNAME)
2133         ret = VARIANT_FALSE;
2134     else
2135         return hres;
2136
2137     V_VT(retv) = VT_BOOL;
2138     V_BOOL(retv) = ret;
2139     return S_OK;
2140 }
2141
2142 /* ECMA-262 3rd Edition    11.8.7 */
2143 HRESULT in_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2144 {
2145     binary_expression_t *expr = (binary_expression_t*)_expr;
2146
2147     TRACE("\n");
2148
2149     return binary_expr_eval(ctx, expr, in_eval, ei, ret);
2150 }
2151
2152 /* ECMA-262 3rd Edition    11.6.1 */
2153 static HRESULT add_eval(script_ctx_t *ctx, VARIANT *lval, VARIANT *rval, jsexcept_t *ei, VARIANT *retv)
2154 {
2155     VARIANT r, l;
2156     HRESULT hres;
2157
2158     hres = to_primitive(ctx, lval, ei, &l, NO_HINT);
2159     if(FAILED(hres))
2160         return hres;
2161
2162     hres = to_primitive(ctx, rval, ei, &r, NO_HINT);
2163     if(FAILED(hres)) {
2164         VariantClear(&l);
2165         return hres;
2166     }
2167
2168     if(V_VT(&l) == VT_BSTR || V_VT(&r) == VT_BSTR) {
2169         BSTR lstr = NULL, rstr = NULL;
2170
2171         if(V_VT(&l) == VT_BSTR)
2172             lstr = V_BSTR(&l);
2173         else
2174             hres = to_string(ctx, &l, ei, &lstr);
2175
2176         if(SUCCEEDED(hres)) {
2177             if(V_VT(&r) == VT_BSTR)
2178                 rstr = V_BSTR(&r);
2179             else
2180                 hres = to_string(ctx, &r, ei, &rstr);
2181         }
2182
2183         if(SUCCEEDED(hres)) {
2184             int len1, len2;
2185
2186             len1 = SysStringLen(lstr);
2187             len2 = SysStringLen(rstr);
2188
2189             V_VT(retv) = VT_BSTR;
2190             V_BSTR(retv) = SysAllocStringLen(NULL, len1+len2);
2191             memcpy(V_BSTR(retv), lstr, len1*sizeof(WCHAR));
2192             memcpy(V_BSTR(retv)+len1, rstr, (len2+1)*sizeof(WCHAR));
2193         }
2194
2195         if(V_VT(&l) != VT_BSTR)
2196             SysFreeString(lstr);
2197         if(V_VT(&r) != VT_BSTR)
2198             SysFreeString(rstr);
2199     }else {
2200         VARIANT nl, nr;
2201
2202         hres = to_number(ctx, &l, ei, &nl);
2203         if(SUCCEEDED(hres)) {
2204             hres = to_number(ctx, &r, ei, &nr);
2205             if(SUCCEEDED(hres))
2206                 num_set_val(retv, num_val(&nl) + num_val(&nr));
2207         }
2208     }
2209
2210     VariantClear(&r);
2211     VariantClear(&l);
2212     return hres;
2213 }
2214
2215 /* ECMA-262 3rd Edition    11.6.1 */
2216 HRESULT add_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2217 {
2218     binary_expression_t *expr = (binary_expression_t*)_expr;
2219
2220     TRACE("\n");
2221
2222     return binary_expr_eval(ctx, expr, add_eval, ei, ret);
2223 }
2224
2225 /* ECMA-262 3rd Edition    11.6.2 */
2226 static HRESULT sub_eval(script_ctx_t *ctx, VARIANT *lval, VARIANT *rval, jsexcept_t *ei, VARIANT *retv)
2227 {
2228     VARIANT lnum, rnum;
2229     HRESULT hres;
2230
2231     hres = to_number(ctx, lval, ei, &lnum);
2232     if(FAILED(hres))
2233         return hres;
2234
2235     hres = to_number(ctx, rval, ei, &rnum);
2236     if(FAILED(hres))
2237         return hres;
2238
2239     num_set_val(retv, num_val(&lnum) - num_val(&rnum));
2240     return S_OK;
2241 }
2242
2243 /* ECMA-262 3rd Edition    11.6.2 */
2244 HRESULT sub_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2245 {
2246     binary_expression_t *expr = (binary_expression_t*)_expr;
2247
2248     TRACE("\n");
2249
2250     return binary_expr_eval(ctx, expr, sub_eval, ei, ret);
2251 }
2252
2253 /* ECMA-262 3rd Edition    11.5.1 */
2254 static HRESULT mul_eval(script_ctx_t *ctx, VARIANT *lval, VARIANT *rval, jsexcept_t *ei, VARIANT *retv)
2255 {
2256     VARIANT lnum, rnum;
2257     HRESULT hres;
2258
2259     hres = to_number(ctx, lval, ei, &lnum);
2260     if(FAILED(hres))
2261         return hres;
2262
2263     hres = to_number(ctx, rval, ei, &rnum);
2264     if(FAILED(hres))
2265         return hres;
2266
2267     num_set_val(retv, num_val(&lnum) * num_val(&rnum));
2268     return S_OK;
2269 }
2270
2271 /* ECMA-262 3rd Edition    11.5.1 */
2272 HRESULT mul_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2273 {
2274     binary_expression_t *expr = (binary_expression_t*)_expr;
2275
2276     TRACE("\n");
2277
2278     return binary_expr_eval(ctx, expr, mul_eval, ei, ret);
2279 }
2280
2281 /* ECMA-262 3rd Edition    11.5.2 */
2282 static HRESULT div_eval(script_ctx_t *ctx, VARIANT *lval, VARIANT *rval, jsexcept_t *ei, VARIANT *retv)
2283 {
2284     VARIANT lnum, rnum;
2285     HRESULT hres;
2286
2287     hres = to_number(ctx, lval, ei, &lnum);
2288     if(FAILED(hres))
2289         return hres;
2290
2291     hres = to_number(ctx, rval, ei, &rnum);
2292     if(FAILED(hres))
2293         return hres;
2294
2295     num_set_val(retv, num_val(&lnum) / num_val(&rnum));
2296     return S_OK;
2297 }
2298
2299 /* ECMA-262 3rd Edition    11.5.2 */
2300 HRESULT div_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2301 {
2302     binary_expression_t *expr = (binary_expression_t*)_expr;
2303
2304     TRACE("\n");
2305
2306     return binary_expr_eval(ctx, expr, div_eval, ei, ret);
2307 }
2308
2309 /* ECMA-262 3rd Edition    11.5.3 */
2310 static HRESULT mod_eval(script_ctx_t *ctx, VARIANT *lval, VARIANT *rval, jsexcept_t *ei, VARIANT *retv)
2311 {
2312     VARIANT lnum, rnum;
2313     HRESULT hres;
2314
2315     hres = to_number(ctx, lval, ei, &lnum);
2316     if(FAILED(hres))
2317         return hres;
2318
2319     hres = to_number(ctx, rval, ei, &rnum);
2320     if(FAILED(hres))
2321         return hres;
2322
2323     num_set_val(retv, fmod(num_val(&lnum), num_val(&rnum)));
2324     return S_OK;
2325 }
2326
2327 /* ECMA-262 3rd Edition    11.5.3 */
2328 HRESULT mod_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2329 {
2330     binary_expression_t *expr = (binary_expression_t*)_expr;
2331
2332     TRACE("\n");
2333
2334     return binary_expr_eval(ctx, expr, mod_eval, ei, ret);
2335 }
2336
2337 /* ECMA-262 3rd Edition    11.4.2 */
2338 HRESULT delete_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2339 {
2340     unary_expression_t *expr = (unary_expression_t*)_expr;
2341     VARIANT_BOOL b = VARIANT_FALSE;
2342     exprval_t exprval;
2343     HRESULT hres;
2344
2345     TRACE("\n");
2346
2347     hres = expr_eval(ctx, expr->expression, EXPR_STRREF, ei, &exprval);
2348     if(FAILED(hres))
2349         return hres;
2350
2351     switch(exprval.type) {
2352     case EXPRVAL_IDREF: {
2353         IDispatchEx *dispex;
2354
2355         hres = IDispatch_QueryInterface(exprval.u.nameref.disp, &IID_IDispatchEx, (void**)&dispex);
2356         if(SUCCEEDED(hres)) {
2357             hres = IDispatchEx_DeleteMemberByDispID(dispex, exprval.u.idref.id);
2358             b = VARIANT_TRUE;
2359             IDispatchEx_Release(dispex);
2360         }
2361         break;
2362     }
2363     case EXPRVAL_NAMEREF: {
2364         IDispatchEx *dispex;
2365
2366         hres = IDispatch_QueryInterface(exprval.u.nameref.disp, &IID_IDispatchEx, (void**)&dispex);
2367         if(SUCCEEDED(hres)) {
2368             hres = IDispatchEx_DeleteMemberByName(dispex, exprval.u.nameref.name,
2369                     make_grfdex(ctx, fdexNameCaseSensitive));
2370             b = VARIANT_TRUE;
2371             IDispatchEx_Release(dispex);
2372         }
2373         break;
2374     }
2375     default:
2376         FIXME("unsupported type %d\n", exprval.type);
2377         hres = E_NOTIMPL;
2378     }
2379
2380     exprval_release(&exprval);
2381     if(FAILED(hres))
2382         return hres;
2383
2384     return return_bool(ret, b);
2385 }
2386
2387 /* ECMA-262 3rd Edition    11.4.2 */
2388 HRESULT void_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2389 {
2390     unary_expression_t *expr = (unary_expression_t*)_expr;
2391     exprval_t exprval;
2392     VARIANT tmp;
2393     HRESULT hres;
2394
2395     TRACE("\n");
2396
2397     hres = expr_eval(ctx, expr->expression, 0, ei, &exprval);
2398     if(FAILED(hres))
2399         return hres;
2400
2401     hres = exprval_to_value(ctx, &exprval, ei, &tmp);
2402     exprval_release(&exprval);
2403     if(FAILED(hres))
2404         return hres;
2405
2406     VariantClear(&tmp);
2407
2408     ret->type = EXPRVAL_VARIANT;
2409     V_VT(&ret->u.var) = VT_EMPTY;
2410     return S_OK;
2411 }
2412
2413 /* ECMA-262 3rd Edition    11.4.3 */
2414 static HRESULT typeof_exprval(script_ctx_t *ctx, exprval_t *exprval, jsexcept_t *ei, const WCHAR **ret)
2415 {
2416     VARIANT val;
2417     HRESULT hres;
2418
2419     static const WCHAR booleanW[] = {'b','o','o','l','e','a','n',0};
2420     static const WCHAR functionW[] = {'f','u','n','c','t','i','o','n',0};
2421     static const WCHAR numberW[] = {'n','u','m','b','e','r',0};
2422     static const WCHAR objectW[] = {'o','b','j','e','c','t',0};
2423     static const WCHAR stringW[] = {'s','t','r','i','n','g',0};
2424     static const WCHAR undefinedW[] = {'u','n','d','e','f','i','n','e','d',0};
2425     static const WCHAR unknownW[] = {'u','n','k','n','o','w','n',0};
2426
2427     if(exprval->type == EXPRVAL_INVALID) {
2428         *ret = undefinedW;
2429         return S_OK;
2430     }
2431
2432     hres = exprval_to_value(ctx, exprval, ei, &val);
2433     if(FAILED(hres)) {
2434         if(exprval->type == EXPRVAL_IDREF) {
2435             *ret = unknownW;
2436             return S_OK;
2437         }
2438         return hres;
2439     }
2440
2441     switch(V_VT(&val)) {
2442     case VT_EMPTY:
2443         *ret = undefinedW;
2444         break;
2445     case VT_NULL:
2446         *ret = objectW;
2447         break;
2448     case VT_BOOL:
2449         *ret = booleanW;
2450         break;
2451     case VT_I4:
2452     case VT_R8:
2453         *ret = numberW;
2454         break;
2455     case VT_BSTR:
2456         *ret = stringW;
2457         break;
2458     case VT_DISPATCH: {
2459         jsdisp_t *dispex;
2460
2461         if(V_DISPATCH(&val) && (dispex = iface_to_jsdisp((IUnknown*)V_DISPATCH(&val)))) {
2462             *ret = is_class(dispex, JSCLASS_FUNCTION) ? functionW : objectW;
2463             jsdisp_release(dispex);
2464         }else {
2465             *ret = objectW;
2466         }
2467         break;
2468     }
2469     default:
2470         FIXME("unhandled vt %d\n", V_VT(&val));
2471         hres = E_NOTIMPL;
2472     }
2473
2474     VariantClear(&val);
2475     return hres;
2476 }
2477
2478 HRESULT typeof_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2479 {
2480     unary_expression_t *expr = (unary_expression_t*)_expr;
2481     const WCHAR *str = NULL;
2482     exprval_t exprval;
2483     HRESULT hres;
2484
2485     TRACE("\n");
2486
2487     hres = expr_eval(ctx, expr->expression, 0, ei, &exprval);
2488     if(FAILED(hres))
2489         return hres;
2490
2491     hres = typeof_exprval(ctx, &exprval, ei, &str);
2492     exprval_release(&exprval);
2493     if(FAILED(hres))
2494         return hres;
2495
2496     ret->type = EXPRVAL_VARIANT;
2497     V_VT(&ret->u.var) = VT_BSTR;
2498     V_BSTR(&ret->u.var) = SysAllocString(str);
2499     if(!V_BSTR(&ret->u.var))
2500         return E_OUTOFMEMORY;
2501
2502     return S_OK;
2503 }
2504
2505 /* ECMA-262 3rd Edition    11.4.7 */
2506 HRESULT minus_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2507 {
2508     unary_expression_t *expr = (unary_expression_t*)_expr;
2509     exprval_t exprval;
2510     VARIANT val, num;
2511     HRESULT hres;
2512
2513     TRACE("\n");
2514
2515     hres = expr_eval(ctx, expr->expression, 0, ei, &exprval);
2516     if(FAILED(hres))
2517         return hres;
2518
2519     hres = exprval_to_value(ctx, &exprval, ei, &val);
2520     exprval_release(&exprval);
2521     if(FAILED(hres))
2522         return hres;
2523
2524     hres = to_number(ctx, &val, ei, &num);
2525     VariantClear(&val);
2526     if(FAILED(hres))
2527         return hres;
2528
2529     ret->type = EXPRVAL_VARIANT;
2530     num_set_val(&ret->u.var, -num_val(&num));
2531     return S_OK;
2532 }
2533
2534 /* ECMA-262 3rd Edition    11.4.6 */
2535 HRESULT interp_tonum(exec_ctx_t *ctx)
2536 {
2537     VARIANT *v, num;
2538     HRESULT hres;
2539
2540     TRACE("\n");
2541
2542     v = stack_pop(ctx);
2543     hres = to_number(ctx->parser->script, v, &ctx->ei, &num);
2544     VariantClear(v);
2545     if(FAILED(hres))
2546         return hres;
2547
2548     return stack_push(ctx, &num);
2549 }
2550
2551 /* ECMA-262 3rd Edition    11.3.1 */
2552 HRESULT post_increment_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2553 {
2554     unary_expression_t *expr = (unary_expression_t*)_expr;
2555     VARIANT val, num;
2556     exprval_t exprval;
2557     HRESULT hres;
2558
2559     TRACE("\n");
2560
2561     hres = expr_eval(ctx, expr->expression, EXPR_NEWREF, ei, &exprval);
2562     if(FAILED(hres))
2563         return hres;
2564
2565     hres = exprval_value(ctx, &exprval, ei, &val);
2566     if(SUCCEEDED(hres)) {
2567         hres = to_number(ctx, &val, ei, &num);
2568         VariantClear(&val);
2569     }
2570
2571     if(SUCCEEDED(hres)) {
2572         VARIANT inc;
2573         num_set_val(&inc, num_val(&num)+1.0);
2574         hres = put_value(ctx, &exprval, &inc, ei);
2575     }
2576
2577     exprval_release(&exprval);
2578     if(FAILED(hres))
2579         return hres;
2580
2581     ret->type = EXPRVAL_VARIANT;
2582     ret->u.var = num;
2583     return S_OK;
2584 }
2585
2586 /* ECMA-262 3rd Edition    11.3.2 */
2587 HRESULT post_decrement_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2588 {
2589     unary_expression_t *expr = (unary_expression_t*)_expr;
2590     VARIANT val, num;
2591     exprval_t exprval;
2592     HRESULT hres;
2593
2594     TRACE("\n");
2595
2596     hres = expr_eval(ctx, expr->expression, EXPR_NEWREF, ei, &exprval);
2597     if(FAILED(hres))
2598         return hres;
2599
2600     hres = exprval_value(ctx, &exprval, ei, &val);
2601     if(SUCCEEDED(hres)) {
2602         hres = to_number(ctx, &val, ei, &num);
2603         VariantClear(&val);
2604     }
2605
2606     if(SUCCEEDED(hres)) {
2607         VARIANT dec;
2608         num_set_val(&dec, num_val(&num)-1.0);
2609         hres = put_value(ctx, &exprval, &dec, ei);
2610     }
2611
2612     exprval_release(&exprval);
2613     if(FAILED(hres))
2614         return hres;
2615
2616     ret->type = EXPRVAL_VARIANT;
2617     ret->u.var = num;
2618     return S_OK;
2619 }
2620
2621 /* ECMA-262 3rd Edition    11.4.4 */
2622 HRESULT pre_increment_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2623 {
2624     unary_expression_t *expr = (unary_expression_t*)_expr;
2625     VARIANT val, num;
2626     exprval_t exprval;
2627     HRESULT hres;
2628
2629     TRACE("\n");
2630
2631     hres = expr_eval(ctx, expr->expression, EXPR_NEWREF, ei, &exprval);
2632     if(FAILED(hres))
2633         return hres;
2634
2635     hres = exprval_value(ctx, &exprval, ei, &val);
2636     if(SUCCEEDED(hres)) {
2637         hres = to_number(ctx, &val, ei, &num);
2638         VariantClear(&val);
2639     }
2640
2641     if(SUCCEEDED(hres)) {
2642         num_set_val(&val, num_val(&num)+1.0);
2643         hres = put_value(ctx, &exprval, &val, ei);
2644     }
2645
2646     exprval_release(&exprval);
2647     if(FAILED(hres))
2648         return hres;
2649
2650     ret->type = EXPRVAL_VARIANT;
2651     ret->u.var = val;
2652     return S_OK;
2653 }
2654
2655 /* ECMA-262 3rd Edition    11.4.5 */
2656 HRESULT pre_decrement_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2657 {
2658     unary_expression_t *expr = (unary_expression_t*)_expr;
2659     VARIANT val, num;
2660     exprval_t exprval;
2661     HRESULT hres;
2662
2663     TRACE("\n");
2664
2665     hres = expr_eval(ctx, expr->expression, EXPR_NEWREF, ei, &exprval);
2666     if(FAILED(hres))
2667         return hres;
2668
2669     hres = exprval_value(ctx, &exprval, ei, &val);
2670     if(SUCCEEDED(hres)) {
2671         hres = to_number(ctx, &val, ei, &num);
2672         VariantClear(&val);
2673     }
2674
2675     if(SUCCEEDED(hres)) {
2676         num_set_val(&val, num_val(&num)-1.0);
2677         hres = put_value(ctx, &exprval, &val, ei);
2678     }
2679
2680     exprval_release(&exprval);
2681     if(FAILED(hres))
2682         return hres;
2683
2684     ret->type = EXPRVAL_VARIANT;
2685     ret->u.var = val;
2686     return S_OK;
2687 }
2688
2689 /* ECMA-262 3rd Edition    11.9.3 */
2690 static HRESULT equal_values(script_ctx_t *ctx, VARIANT *lval, VARIANT *rval, jsexcept_t *ei, BOOL *ret)
2691 {
2692     if(V_VT(lval) == V_VT(rval) || (is_num_vt(V_VT(lval)) && is_num_vt(V_VT(rval))))
2693        return equal2_values(lval, rval, ret);
2694
2695     /* FIXME: NULL disps should be handled in more general way */
2696     if(V_VT(lval) == VT_DISPATCH && !V_DISPATCH(lval)) {
2697         VARIANT v;
2698         V_VT(&v) = VT_NULL;
2699         return equal_values(ctx, &v, rval, ei, ret);
2700     }
2701
2702     if(V_VT(rval) == VT_DISPATCH && !V_DISPATCH(rval)) {
2703         VARIANT v;
2704         V_VT(&v) = VT_NULL;
2705         return equal_values(ctx, lval, &v, ei, ret);
2706     }
2707
2708     if((V_VT(lval) == VT_NULL && V_VT(rval) == VT_EMPTY) ||
2709        (V_VT(lval) == VT_EMPTY && V_VT(rval) == VT_NULL)) {
2710         *ret = TRUE;
2711         return S_OK;
2712     }
2713
2714     if(V_VT(lval) == VT_BSTR && is_num_vt(V_VT(rval))) {
2715         VARIANT v;
2716         HRESULT hres;
2717
2718         hres = to_number(ctx, lval, ei, &v);
2719         if(FAILED(hres))
2720             return hres;
2721
2722         return equal_values(ctx, &v, rval, ei, ret);
2723     }
2724
2725     if(V_VT(rval) == VT_BSTR && is_num_vt(V_VT(lval))) {
2726         VARIANT v;
2727         HRESULT hres;
2728
2729         hres = to_number(ctx, rval, ei, &v);
2730         if(FAILED(hres))
2731             return hres;
2732
2733         return equal_values(ctx, lval, &v, ei, ret);
2734     }
2735
2736     if(V_VT(rval) == VT_BOOL) {
2737         VARIANT v;
2738
2739         V_VT(&v) = VT_I4;
2740         V_I4(&v) = V_BOOL(rval) ? 1 : 0;
2741         return equal_values(ctx, lval, &v, ei, ret);
2742     }
2743
2744     if(V_VT(lval) == VT_BOOL) {
2745         VARIANT v;
2746
2747         V_VT(&v) = VT_I4;
2748         V_I4(&v) = V_BOOL(lval) ? 1 : 0;
2749         return equal_values(ctx, &v, rval, ei, ret);
2750     }
2751
2752
2753     if(V_VT(rval) == VT_DISPATCH && (V_VT(lval) == VT_BSTR || is_num_vt(V_VT(lval)))) {
2754         VARIANT v;
2755         HRESULT hres;
2756
2757         hres = to_primitive(ctx, rval, ei, &v, NO_HINT);
2758         if(FAILED(hres))
2759             return hres;
2760
2761         hres = equal_values(ctx, lval, &v, ei, ret);
2762
2763         VariantClear(&v);
2764         return hres;
2765     }
2766
2767
2768     if(V_VT(lval) == VT_DISPATCH && (V_VT(rval) == VT_BSTR || is_num_vt(V_VT(rval)))) {
2769         VARIANT v;
2770         HRESULT hres;
2771
2772         hres = to_primitive(ctx, lval, ei, &v, NO_HINT);
2773         if(FAILED(hres))
2774             return hres;
2775
2776         hres = equal_values(ctx, &v, rval, ei, ret);
2777
2778         VariantClear(&v);
2779         return hres;
2780     }
2781
2782
2783     *ret = FALSE;
2784     return S_OK;
2785 }
2786
2787 /* ECMA-262 3rd Edition    11.9.1 */
2788 HRESULT equal_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2789 {
2790     binary_expression_t *expr = (binary_expression_t*)_expr;
2791     VARIANT rval, lval;
2792     BOOL b;
2793     HRESULT hres;
2794
2795     TRACE("\n");
2796
2797     hres = get_binary_expr_values(ctx, expr, ei, &rval, &lval);
2798     if(FAILED(hres))
2799         return hres;
2800
2801     hres = equal_values(ctx, &rval, &lval, ei, &b);
2802     VariantClear(&lval);
2803     VariantClear(&rval);
2804     if(FAILED(hres))
2805         return hres;
2806
2807     return return_bool(ret, b);
2808 }
2809
2810 /* ECMA-262 3rd Edition    11.9.4 */
2811 static HRESULT interp_eq2(exec_ctx_t *ctx)
2812 {
2813     VARIANT *l, *r;
2814     BOOL b;
2815     HRESULT hres;
2816
2817     TRACE("\n");
2818
2819     r = stack_pop(ctx);
2820     l = stack_pop(ctx);
2821
2822     hres = equal2_values(r, l, &b);
2823     VariantClear(l);
2824     VariantClear(r);
2825     if(FAILED(hres))
2826         return hres;
2827
2828     return stack_push_bool(ctx, b);
2829 }
2830
2831 /* ECMA-262 3rd Edition    11.9.2 */
2832 HRESULT not_equal_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2833 {
2834     binary_expression_t *expr = (binary_expression_t*)_expr;
2835     VARIANT rval, lval;
2836     BOOL b;
2837     HRESULT hres;
2838
2839     TRACE("\n");
2840
2841     hres = get_binary_expr_values(ctx, expr, ei, &lval, &rval);
2842     if(FAILED(hres))
2843         return hres;
2844
2845     hres = equal_values(ctx, &lval, &rval, ei, &b);
2846     VariantClear(&lval);
2847     VariantClear(&rval);
2848     if(FAILED(hres))
2849         return hres;
2850
2851     return return_bool(ret, !b);
2852 }
2853
2854 /* ECMA-262 3rd Edition    11.9.5 */
2855 static HRESULT interp_neq2(exec_ctx_t *ctx)
2856 {
2857     VARIANT *l, *r;
2858     BOOL b;
2859     HRESULT hres;
2860
2861     TRACE("\n");
2862
2863     r = stack_pop(ctx);
2864     l = stack_pop(ctx);
2865
2866     hres = equal2_values(r, l, &b);
2867     VariantClear(l);
2868     VariantClear(r);
2869     if(FAILED(hres))
2870         return hres;
2871
2872     return stack_push_bool(ctx, !b);
2873 }
2874
2875 /* ECMA-262 3rd Edition    11.8.5 */
2876 static HRESULT less_eval(script_ctx_t *ctx, VARIANT *lval, VARIANT *rval, BOOL greater, jsexcept_t *ei, BOOL *ret)
2877 {
2878     VARIANT l, r, ln, rn;
2879     HRESULT hres;
2880
2881     hres = to_primitive(ctx, lval, ei, &l, NO_HINT);
2882     if(FAILED(hres))
2883         return hres;
2884
2885     hres = to_primitive(ctx, rval, ei, &r, NO_HINT);
2886     if(FAILED(hres)) {
2887         VariantClear(&l);
2888         return hres;
2889     }
2890
2891     if(V_VT(&l) == VT_BSTR && V_VT(&r) == VT_BSTR) {
2892         *ret = (strcmpW(V_BSTR(&l), V_BSTR(&r)) < 0) ^ greater;
2893         SysFreeString(V_BSTR(&l));
2894         SysFreeString(V_BSTR(&r));
2895         return S_OK;
2896     }
2897
2898     hres = to_number(ctx, &l, ei, &ln);
2899     VariantClear(&l);
2900     if(SUCCEEDED(hres))
2901         hres = to_number(ctx, &r, ei, &rn);
2902     VariantClear(&r);
2903     if(FAILED(hres))
2904         return hres;
2905
2906     if(V_VT(&ln) == VT_I4 && V_VT(&rn) == VT_I4) {
2907         *ret = (V_I4(&ln) < V_I4(&rn)) ^ greater;
2908     }else  {
2909         DOUBLE ld = num_val(&ln);
2910         DOUBLE rd = num_val(&rn);
2911
2912         *ret = !isnan(ld) && !isnan(rd) && ((ld < rd) ^ greater);
2913     }
2914
2915     return S_OK;
2916 }
2917
2918 /* ECMA-262 3rd Edition    11.8.1 */
2919 HRESULT less_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2920 {
2921     binary_expression_t *expr = (binary_expression_t*)_expr;
2922     VARIANT rval, lval;
2923     BOOL b;
2924     HRESULT hres;
2925
2926     TRACE("\n");
2927
2928     hres = get_binary_expr_values(ctx, expr, ei, &lval, &rval);
2929     if(FAILED(hres))
2930         return hres;
2931
2932     hres = less_eval(ctx, &lval, &rval, FALSE, ei, &b);
2933     VariantClear(&lval);
2934     VariantClear(&rval);
2935     if(FAILED(hres))
2936         return hres;
2937
2938     return return_bool(ret, b);
2939 }
2940
2941 /* ECMA-262 3rd Edition    11.8.3 */
2942 HRESULT lesseq_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2943 {
2944     binary_expression_t *expr = (binary_expression_t*)_expr;
2945     VARIANT rval, lval;
2946     BOOL b;
2947     HRESULT hres;
2948
2949     TRACE("\n");
2950
2951     hres = get_binary_expr_values(ctx, expr, ei, &lval, &rval);
2952     if(FAILED(hres))
2953         return hres;
2954
2955     hres = less_eval(ctx, &rval, &lval, TRUE, ei, &b);
2956     VariantClear(&lval);
2957     VariantClear(&rval);
2958     if(FAILED(hres))
2959         return hres;
2960
2961     return return_bool(ret, b);
2962 }
2963
2964 /* ECMA-262 3rd Edition    11.8.2 */
2965 HRESULT greater_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2966 {
2967     binary_expression_t *expr = (binary_expression_t*)_expr;
2968     VARIANT rval, lval;
2969     BOOL b;
2970     HRESULT hres;
2971
2972     TRACE("\n");
2973
2974     hres = get_binary_expr_values(ctx, expr, ei, &lval, &rval);
2975     if(FAILED(hres))
2976         return hres;
2977
2978     hres = less_eval(ctx, &rval, &lval, FALSE, ei, &b);
2979     VariantClear(&lval);
2980     VariantClear(&rval);
2981     if(FAILED(hres))
2982         return hres;
2983
2984     return return_bool(ret, b);
2985 }
2986
2987 /* ECMA-262 3rd Edition    11.8.4 */
2988 HRESULT greatereq_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
2989 {
2990     binary_expression_t *expr = (binary_expression_t*)_expr;
2991     VARIANT rval, lval;
2992     BOOL b;
2993     HRESULT hres;
2994
2995     TRACE("\n");
2996
2997     hres = get_binary_expr_values(ctx, expr, ei, &lval, &rval);
2998     if(FAILED(hres))
2999         return hres;
3000
3001     hres = less_eval(ctx, &lval, &rval, TRUE, ei, &b);
3002     VariantClear(&lval);
3003     VariantClear(&rval);
3004     if(FAILED(hres))
3005         return hres;
3006
3007     return return_bool(ret, b);
3008 }
3009
3010 /* ECMA-262 3rd Edition    11.4.8 */
3011 HRESULT interp_bneg(exec_ctx_t *ctx)
3012 {
3013     VARIANT *v, r;
3014     INT i;
3015     HRESULT hres;
3016
3017     TRACE("\n");
3018
3019     v = stack_pop(ctx);
3020     hres = to_int32(ctx->parser->script, v, &ctx->ei, &i);
3021     VariantClear(v);
3022     if(FAILED(hres))
3023         return hres;
3024
3025     V_VT(&r) = VT_I4;
3026     V_I4(&r) = ~i;
3027     return stack_push(ctx, &r);
3028 }
3029
3030 /* ECMA-262 3rd Edition    11.4.9 */
3031 HRESULT interp_neg(exec_ctx_t *ctx)
3032 {
3033     VARIANT *v;
3034     VARIANT_BOOL b;
3035     HRESULT hres;
3036
3037     TRACE("\n");
3038
3039     v = stack_pop(ctx);
3040     hres = to_boolean(v, &b);
3041     VariantClear(v);
3042     if(FAILED(hres))
3043         return hres;
3044
3045     return stack_push_bool(ctx, !b);
3046 }
3047
3048 /* ECMA-262 3rd Edition    11.7.1 */
3049 static HRESULT lshift_eval(script_ctx_t *ctx, VARIANT *lval, VARIANT *rval, jsexcept_t *ei, VARIANT *retv)
3050 {
3051     DWORD ri;
3052     INT li;
3053     HRESULT hres;
3054
3055     hres = to_int32(ctx, lval, ei, &li);
3056     if(FAILED(hres))
3057         return hres;
3058
3059     hres = to_uint32(ctx, rval, ei, &ri);
3060     if(FAILED(hres))
3061         return hres;
3062
3063     V_VT(retv) = VT_I4;
3064     V_I4(retv) = li << (ri&0x1f);
3065     return S_OK;
3066 }
3067
3068 /* ECMA-262 3rd Edition    11.7.1 */
3069 HRESULT left_shift_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3070 {
3071     binary_expression_t *expr = (binary_expression_t*)_expr;
3072
3073     TRACE("\n");
3074
3075     return binary_expr_eval(ctx, expr, lshift_eval, ei, ret);
3076 }
3077
3078 /* ECMA-262 3rd Edition    11.7.2 */
3079 static HRESULT rshift_eval(script_ctx_t *ctx, VARIANT *lval, VARIANT *rval, jsexcept_t *ei, VARIANT *retv)
3080 {
3081     DWORD ri;
3082     INT li;
3083     HRESULT hres;
3084
3085     hres = to_int32(ctx, lval, ei, &li);
3086     if(FAILED(hres))
3087         return hres;
3088
3089     hres = to_uint32(ctx, rval, ei, &ri);
3090     if(FAILED(hres))
3091         return hres;
3092
3093     V_VT(retv) = VT_I4;
3094     V_I4(retv) = li >> (ri&0x1f);
3095     return S_OK;
3096 }
3097
3098 /* ECMA-262 3rd Edition    11.7.2 */
3099 HRESULT right_shift_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3100 {
3101     binary_expression_t *expr = (binary_expression_t*)_expr;
3102
3103     TRACE("\n");
3104
3105     return binary_expr_eval(ctx, expr, rshift_eval, ei, ret);
3106 }
3107
3108 /* ECMA-262 3rd Edition    11.7.3 */
3109 static HRESULT rshift2_eval(script_ctx_t *ctx, VARIANT *lval, VARIANT *rval, jsexcept_t *ei, VARIANT *retv)
3110 {
3111     DWORD li, ri;
3112     HRESULT hres;
3113
3114     hres = to_uint32(ctx, lval, ei, &li);
3115     if(FAILED(hres))
3116         return hres;
3117
3118     hres = to_uint32(ctx, rval, ei, &ri);
3119     if(FAILED(hres))
3120         return hres;
3121
3122     V_VT(retv) = VT_I4;
3123     V_I4(retv) = li >> (ri&0x1f);
3124     return S_OK;
3125 }
3126
3127 /* ECMA-262 3rd Edition    11.7.3 */
3128 HRESULT right2_shift_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3129 {
3130     binary_expression_t *expr = (binary_expression_t*)_expr;
3131
3132     TRACE("\n");
3133
3134     return binary_expr_eval(ctx, expr, rshift2_eval, ei, ret);
3135 }
3136
3137 /* ECMA-262 3rd Edition    11.13.1 */
3138 HRESULT assign_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3139 {
3140     binary_expression_t *expr = (binary_expression_t*)_expr;
3141     exprval_t exprval, exprvalr;
3142     VARIANT rval;
3143     HRESULT hres;
3144
3145     TRACE("\n");
3146
3147     hres = expr_eval(ctx, expr->expression1, EXPR_NEWREF, ei, &exprval);
3148     if(FAILED(hres))
3149         return hres;
3150
3151     hres = expr_eval(ctx, expr->expression2, 0, ei, &exprvalr);
3152     if(SUCCEEDED(hres)) {
3153         hres = exprval_to_value(ctx, &exprvalr, ei, &rval);
3154         exprval_release(&exprvalr);
3155     }
3156
3157     if(SUCCEEDED(hres)) {
3158         hres = put_value(ctx, &exprval, &rval, ei);
3159         if(FAILED(hres))
3160             VariantClear(&rval);
3161     }
3162
3163     exprval_release(&exprval);
3164     if(FAILED(hres))
3165         return hres;
3166
3167     ret->type = EXPRVAL_VARIANT;
3168     ret->u.var = rval;
3169     return S_OK;
3170 }
3171
3172 /* ECMA-262 3rd Edition    11.13.2 */
3173 HRESULT assign_lshift_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3174 {
3175     binary_expression_t *expr = (binary_expression_t*)_expr;
3176
3177     TRACE("\n");
3178
3179     return assign_oper_eval(ctx, expr->expression1, expr->expression2, lshift_eval, ei, ret);
3180 }
3181
3182 /* ECMA-262 3rd Edition    11.13.2 */
3183 HRESULT assign_rshift_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3184 {
3185     binary_expression_t *expr = (binary_expression_t*)_expr;
3186
3187     TRACE("\n");
3188
3189     return assign_oper_eval(ctx, expr->expression1, expr->expression2, rshift_eval, ei, ret);
3190 }
3191
3192 /* ECMA-262 3rd Edition    11.13.2 */
3193 HRESULT assign_rrshift_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3194 {
3195     binary_expression_t *expr = (binary_expression_t*)_expr;
3196
3197     TRACE("\n");
3198
3199     return assign_oper_eval(ctx, expr->expression1, expr->expression2, rshift2_eval, ei, ret);
3200 }
3201
3202 /* ECMA-262 3rd Edition    11.13.2 */
3203 HRESULT assign_add_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3204 {
3205     binary_expression_t *expr = (binary_expression_t*)_expr;
3206
3207     TRACE("\n");
3208
3209     return assign_oper_eval(ctx, expr->expression1, expr->expression2, add_eval, ei, ret);
3210 }
3211
3212 /* ECMA-262 3rd Edition    11.13.2 */
3213 HRESULT assign_sub_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3214 {
3215     binary_expression_t *expr = (binary_expression_t*)_expr;
3216
3217     TRACE("\n");
3218
3219     return assign_oper_eval(ctx, expr->expression1, expr->expression2, sub_eval, ei, ret);
3220 }
3221
3222 /* ECMA-262 3rd Edition    11.13.2 */
3223 HRESULT assign_mul_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3224 {
3225     binary_expression_t *expr = (binary_expression_t*)_expr;
3226
3227     TRACE("\n");
3228
3229     return assign_oper_eval(ctx, expr->expression1, expr->expression2, mul_eval, ei, ret);
3230 }
3231
3232 /* ECMA-262 3rd Edition    11.13.2 */
3233 HRESULT assign_div_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3234 {
3235     binary_expression_t *expr = (binary_expression_t*)_expr;
3236
3237     TRACE("\n");
3238
3239     return assign_oper_eval(ctx, expr->expression1, expr->expression2, div_eval, ei, ret);
3240 }
3241
3242 /* ECMA-262 3rd Edition    11.13.2 */
3243 HRESULT assign_mod_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3244 {
3245     binary_expression_t *expr = (binary_expression_t*)_expr;
3246
3247     TRACE("\n");
3248
3249     return assign_oper_eval(ctx, expr->expression1, expr->expression2, mod_eval, ei, ret);
3250 }
3251
3252 /* ECMA-262 3rd Edition    11.13.2 */
3253 HRESULT assign_and_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3254 {
3255     binary_expression_t *expr = (binary_expression_t*)_expr;
3256
3257     TRACE("\n");
3258
3259     return assign_oper_eval(ctx, expr->expression1, expr->expression2, bitand_eval, ei, ret);
3260 }
3261
3262 /* ECMA-262 3rd Edition    11.13.2 */
3263 HRESULT assign_or_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3264 {
3265     binary_expression_t *expr = (binary_expression_t*)_expr;
3266
3267     TRACE("\n");
3268
3269     return assign_oper_eval(ctx, expr->expression1, expr->expression2, bitor_eval, ei, ret);
3270 }
3271
3272 /* ECMA-262 3rd Edition    11.13.2 */
3273 HRESULT assign_xor_expression_eval(script_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3274 {
3275     binary_expression_t *expr = (binary_expression_t*)_expr;
3276
3277     TRACE("\n");
3278
3279     return assign_oper_eval(ctx, expr->expression1, expr->expression2, xor_eval, ei, ret);
3280 }
3281
3282 static HRESULT interp_ret(exec_ctx_t *ctx)
3283 {
3284     TRACE("\n");
3285
3286     ctx->ip = -1;
3287     return S_OK;
3288 }
3289
3290 static HRESULT interp_tree(exec_ctx_t *ctx)
3291 {
3292     instr_t *instr = ctx->parser->code->instrs+ctx->ip;
3293     exprval_t val;
3294     VARIANT v;
3295     HRESULT hres;
3296
3297     TRACE("\n");
3298
3299     hres = expr_eval(ctx->parser->script, instr->arg1.expr, 0, &ctx->ei, &val);
3300     if(FAILED(hres))
3301         return hres;
3302
3303     hres = exprval_to_value(ctx->parser->script, &val, &ctx->ei, &v);
3304     if(FAILED(hres))
3305         return hres;
3306
3307     return stack_push(ctx, &v);
3308 }
3309
3310 typedef HRESULT (*op_func_t)(exec_ctx_t*);
3311
3312 static const op_func_t op_funcs[] = {
3313 #define X(x,a,b) interp_##x,
3314 OP_LIST
3315 #undef X
3316 };
3317
3318 static const unsigned op_move[] = {
3319 #define X(a,x,b) x,
3320 OP_LIST
3321 #undef X
3322 };
3323
3324 HRESULT interp_expression_eval(script_ctx_t *ctx, expression_t *expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3325 {
3326     exec_ctx_t *exec_ctx = ctx->exec_ctx;
3327     unsigned prev_ip, prev_top;
3328     jsop_t op;
3329     HRESULT hres = S_OK;
3330
3331     TRACE("\n");
3332
3333     prev_top = exec_ctx->top;
3334     prev_ip = exec_ctx->ip;
3335     exec_ctx->ip = expr->instr_off;
3336
3337     while(exec_ctx->ip != -1) {
3338         op = exec_ctx->parser->code->instrs[exec_ctx->ip].op;
3339         hres = op_funcs[op](exec_ctx);
3340         if(FAILED(hres))
3341             break;
3342         exec_ctx->ip += op_move[op];
3343     }
3344
3345     exec_ctx->ip = prev_ip;
3346
3347     if(FAILED(hres)) {
3348         stack_popn(exec_ctx, exec_ctx->top-prev_top);
3349         *ei = exec_ctx->ei;
3350         memset(&exec_ctx->ei, 0, sizeof(exec_ctx->ei));
3351         return hres;
3352     }
3353
3354     assert(exec_ctx->top == prev_top+1);
3355
3356     ret->type = EXPRVAL_VARIANT;
3357     ret->u.var = *stack_pop(exec_ctx);
3358     return S_OK;
3359 }
3360
3361 HRESULT compiled_expression_eval(script_ctx_t *ctx, expression_t *expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
3362 {
3363     HRESULT hres;
3364
3365     TRACE("\n");
3366
3367     hres = compile_subscript(ctx->exec_ctx->parser, expr, &expr->instr_off);
3368     if(FAILED(hres))
3369         return hres;
3370
3371     return (expr->eval = interp_expression_eval)(ctx, expr, flags, ei, ret);
3372 }