dll/win32/jscript/jsutils.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 "jscript.h"
  20
  21 WINE_DECLARE_DEBUG_CHANNEL(heap);
  22
  23 const char *debugstr_jsval(const jsval_t v)
  24 {
  25     switch(jsval_type(v)) {
  26     case JSV_UNDEFINED:
  27         return "undefined";
  28     case JSV_NULL:
  29         return "null";
  30     case JSV_OBJECT:
  31         return wine_dbg_sprintf("obj(%p)", get_object(v));
  32     case JSV_STRING:
  33         return wine_dbg_sprintf("str(%s)", debugstr_jsstr(get_string(v)));
  34     case JSV_NUMBER:
  35         return wine_dbg_sprintf("%lf", get_number(v));
  36     case JSV_BOOL:
  37         return get_bool(v) ? "true" : "false";
  38     case JSV_VARIANT:
  39         return debugstr_variant(get_variant(v));
  40     }
  41
  42     assert(0);
  43     return NULL;
  44 }
  45
  46 BOOL is_finite(double n)
  47 {
  48     return !isnan(n) && !isinf(n);
  49 }
  50
  51 #define MIN_BLOCK_SIZE  128
  52 #define ARENA_FREE_FILLER  0xaa
  53
  54 static inline DWORD block_size(DWORD block)
  55 {
  56     return MIN_BLOCK_SIZE << block;
  57 }
  58
  59 void heap_pool_init(heap_pool_t *heap)
  60 {
  61     memset(heap, 0, sizeof(*heap));
  62     list_init(&heap->custom_blocks);
  63 }
  64
  65 void *heap_pool_alloc(heap_pool_t *heap, DWORD size)
  66 {
  67     struct list *list;
  68     void *tmp;
  69
  70     if(!heap->block_cnt) {
  71         if(!heap->blocks) {
  72             heap->blocks = heap_alloc(sizeof(void*));
  73             if(!heap->blocks)
  74                 return NULL;
  75         }
  76
  77         tmp = heap_alloc(block_size(0));
  78         if(!tmp)
  79             return NULL;
  80
  81         heap->blocks[0] = tmp;
  82         heap->block_cnt = 1;
  83     }
  84
  85     if(heap->offset + size <= block_size(heap->last_block)) {
  86         tmp = ((BYTE*)heap->blocks[heap->last_block])+heap->offset;
  87         heap->offset += size;
  88         return tmp;
  89     }
  90
  91     if(size <= block_size(heap->last_block+1)) {
  92         if(heap->last_block+1 == heap->block_cnt) {
  93             tmp = heap_realloc(heap->blocks, (heap->block_cnt+1)*sizeof(void*));
  94             if(!tmp)
  95                 return NULL;
  96
  97             heap->blocks = tmp;
  98             heap->blocks[heap->block_cnt] = heap_alloc(block_size(heap->block_cnt));
  99             if(!heap->blocks[heap->block_cnt])
 100                 return NULL;
 101
 102             heap->block_cnt++;
 103         }
 104
 105         heap->last_block++;
 106         heap->offset = size;
 107         return heap->blocks[heap->last_block];
 108     }
 109
 110     list = heap_alloc(size + sizeof(struct list));
 111     if(!list)
 112         return NULL;
 113
 114     list_add_head(&heap->custom_blocks, list);
 115     return list+1;
 116 }
 117
 118 void *heap_pool_grow(heap_pool_t *heap, void *mem, DWORD size, DWORD inc)
 119 {
 120     void *ret;
 121
 122     if(mem == (BYTE*)heap->blocks[heap->last_block] + heap->offset-size
 123        && heap->offset+inc < block_size(heap->last_block)) {
 124         heap->offset += inc;
 125         return mem;
 126     }
 127
 128     ret = heap_pool_alloc(heap, size+inc);
 129     if(ret) /* FIXME: avoid copying for custom blocks */
 130         memcpy(ret, mem, size);
 131     return ret;
 132 }
 133
 134 void heap_pool_clear(heap_pool_t *heap)
 135 {
 136     struct list *tmp;
 137
 138     if(!heap)
 139         return;
 140
 141     while((tmp = list_head(&heap->custom_blocks))) {
 142         list_remove(tmp);
 143         heap_free(tmp);
 144     }
 145
 146     if(WARN_ON(heap)) {
 147         DWORD i;
 148
 149         for(i=0; i < heap->block_cnt; i++)
 150             memset(heap->blocks[i], ARENA_FREE_FILLER, block_size(i));
 151     }
 152
 153     heap->last_block = heap->offset = 0;
 154     heap->mark = FALSE;
 155 }
 156
 157 void heap_pool_free(heap_pool_t *heap)
 158 {
 159     DWORD i;
 160
 161     heap_pool_clear(heap);
 162
 163     for(i=0; i < heap->block_cnt; i++)
 164         heap_free(heap->blocks[i]);
 165     heap_free(heap->blocks);
 166
 167     heap_pool_init(heap);
 168 }
 169
 170 heap_pool_t *heap_pool_mark(heap_pool_t *heap)
 171 {
 172     if(heap->mark)
 173         return NULL;
 174
 175     heap->mark = TRUE;
 176     return heap;
 177 }
 178
 179 void jsval_release(jsval_t val)
 180 {
 181     switch(jsval_type(val)) {
 182     case JSV_OBJECT:
 183         if(get_object(val))
 184             IDispatch_Release(get_object(val));
 185         break;
 186     case JSV_STRING:
 187         jsstr_release(get_string(val));
 188         break;
 189     case JSV_VARIANT:
 190         VariantClear(get_variant(val));
 191         heap_free(get_variant(val));
 192         break;
 193     default:
 194         break;
 195     }
 196 }
 197
 198 static HRESULT jsval_variant(jsval_t *val, VARIANT *var)
 199 {
 200     VARIANT *v;
 201     HRESULT hres;
 202
 203     __JSVAL_TYPE(*val) = JSV_VARIANT;
 204     __JSVAL_VAR(*val) = v = heap_alloc(sizeof(VARIANT));
 205     if(!v) {
 206         *val = jsval_undefined();
 207         return E_OUTOFMEMORY;
 208     }
 209
 210     V_VT(v) = VT_EMPTY;
 211     hres = VariantCopy(v, var);
 212     if(FAILED(hres)) {
 213         *val = jsval_undefined();
 214         heap_free(v);
 215     }
 216     return hres;
 217 }
 218
 219 HRESULT jsval_copy(jsval_t v, jsval_t *r)
 220 {
 221     switch(jsval_type(v)) {
 222     case JSV_UNDEFINED:
 223     case JSV_NULL:
 224     case JSV_NUMBER:
 225     case JSV_BOOL:
 226         *r = v;
 227         return S_OK;
 228     case JSV_OBJECT:
 229         if(get_object(v))
 230             IDispatch_AddRef(get_object(v));
 231         *r = v;
 232         return S_OK;
 233     case JSV_STRING: {
 234         jsstr_addref(get_string(v));
 235         *r = v;
 236         return S_OK;
 237     }
 238     case JSV_VARIANT:
 239         return jsval_variant(r, get_variant(v));
 240     }
 241
 242     assert(0);
 243     return E_FAIL;
 244 }
 245
 246 HRESULT variant_to_jsval(VARIANT *var, jsval_t *r)
 247 {
 248     if(V_VT(var) == (VT_VARIANT|VT_BYREF))
 249         var = V_VARIANTREF(var);
 250
 251     switch(V_VT(var)) {
 252     case VT_EMPTY:
 253         *r = jsval_undefined();
 254         return S_OK;
 255     case VT_NULL:
 256         *r = jsval_null();
 257         return S_OK;
 258     case VT_BOOL:
 259         *r = jsval_bool(V_BOOL(var));
 260         return S_OK;
 261     case VT_I4:
 262         *r = jsval_number(V_I4(var));
 263         return S_OK;
 264     case VT_R8:
 265         *r = jsval_number(V_R8(var));
 266         return S_OK;
 267     case VT_BSTR: {
 268         jsstr_t *str;
 269
 270         if(V_BSTR(var)) {
 271             str = jsstr_alloc_len(V_BSTR(var), SysStringLen(V_BSTR(var)));
 272             if(!str)
 273                 return E_OUTOFMEMORY;
 274         }else {
 275             str = jsstr_null_bstr();
 276         }
 277
 278         *r = jsval_string(str);
 279         return S_OK;
 280     }
 281     case VT_DISPATCH: {
 282         if(V_DISPATCH(var))
 283             IDispatch_AddRef(V_DISPATCH(var));
 284         *r = jsval_disp(V_DISPATCH(var));
 285         return S_OK;
 286     }
 287     case VT_I2:
 288         *r = jsval_number(V_I2(var));
 289         return S_OK;
 290     case VT_INT:
 291         *r = jsval_number(V_INT(var));
 292         return S_OK;
 293     case VT_UI4:
 294         *r = jsval_number(V_UI4(var));
 295         return S_OK;
 296     case VT_R4:
 297         *r = jsval_number(V_R4(var));
 298         return S_OK;
 299     case VT_UNKNOWN:
 300         if(V_UNKNOWN(var)) {
 301             IDispatch *disp;
 302             HRESULT hres;
 303
 304             hres = IUnknown_QueryInterface(V_UNKNOWN(var), &IID_IDispatch, (void**)&disp);
 305             if(SUCCEEDED(hres)) {
 306                 *r = jsval_disp(disp);
 307                 return S_OK;
 308             }
 309         }else {
 310             *r = jsval_disp(NULL);
 311             return S_OK;
 312         }
 313         /* fall through */
 314     default:
 315         return jsval_variant(r, var);
 316     }
 317 }
 318
 319 HRESULT jsval_to_variant(jsval_t val, VARIANT *retv)
 320 {
 321     switch(jsval_type(val)) {
 322     case JSV_UNDEFINED:
 323         V_VT(retv) = VT_EMPTY;
 324         return S_OK;
 325     case JSV_NULL:
 326         V_VT(retv) = VT_NULL;
 327         return S_OK;
 328     case JSV_OBJECT:
 329         V_VT(retv) = VT_DISPATCH;
 330         if(get_object(val))
 331             IDispatch_AddRef(get_object(val));
 332         V_DISPATCH(retv) = get_object(val);
 333         return S_OK;
 334     case JSV_STRING: {
 335         jsstr_t *str = get_string(val);
 336
 337         V_VT(retv) = VT_BSTR;
 338         if(is_null_bstr(str)) {
 339             V_BSTR(retv) = NULL;
 340         }else {
 341             V_BSTR(retv) = SysAllocStringLen(NULL, jsstr_length(str));
 342             if(V_BSTR(retv))
 343                 jsstr_flush(str, V_BSTR(retv));
 344             else
 345                 return E_OUTOFMEMORY;
 346         }
 347         return S_OK;
 348     }
 349     case JSV_NUMBER: {
 350         double n = get_number(val);
 351
 352         if(is_int32(n)) {
 353             V_VT(retv) = VT_I4;
 354             V_I4(retv) = n;
 355         }else {
 356             V_VT(retv) = VT_R8;
 357             V_R8(retv) = n;
 358         }
 359
 360         return S_OK;
 361     }
 362     case JSV_BOOL:
 363         V_VT(retv) = VT_BOOL;
 364         V_BOOL(retv) = get_bool(val) ? VARIANT_TRUE : VARIANT_FALSE;
 365         return S_OK;
 366     case JSV_VARIANT:
 367         V_VT(retv) = VT_EMPTY;
 368         return VariantCopy(retv, get_variant(val));
 369     }
 370
 371     assert(0);
 372     return E_FAIL;
 373 }
 374
 375 /* ECMA-262 3rd Edition    9.1 */
 376 HRESULT to_primitive(script_ctx_t *ctx, jsval_t val, jsval_t *ret, hint_t hint)
 377 {
 378     if(is_object_instance(val)) {
 379         jsdisp_t *jsdisp;
 380         jsval_t prim;
 381         DISPID id;
 382         HRESULT hres;
 383
 384         static const WCHAR toStringW[] = {'t','o','S','t','r','i','n','g',0};
 385         static const WCHAR valueOfW[] = {'v','a','l','u','e','O','f',0};
 386
 387         if(!get_object(val)) {
 388             *ret = jsval_null();
 389             return S_OK;
 390         }
 391
 392         jsdisp = iface_to_jsdisp(get_object(val));
 393         if(!jsdisp)
 394             return disp_propget(ctx, get_object(val), DISPID_VALUE, ret);
 395
 396         if(hint == NO_HINT)
 397             hint = is_class(jsdisp, JSCLASS_DATE) ? HINT_STRING : HINT_NUMBER;
 398
 399         /* Native implementation doesn't throw TypeErrors, returns strange values */
 400
 401         hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? toStringW : valueOfW, 0, &id);
 402         if(SUCCEEDED(hres)) {
 403             hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, 0, NULL, &prim);
 404             if(FAILED(hres)) {
 405                 WARN("call error - forwarding exception\n");
 406                 jsdisp_release(jsdisp);
 407                 return hres;
 408             }else if(!is_object_instance(prim)) {
 409                 jsdisp_release(jsdisp);
 410                 *ret = prim;
 411                 return S_OK;
 412             }else {
 413                 IDispatch_Release(get_object(prim));
 414             }
 415         }
 416
 417         hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? valueOfW : toStringW, 0, &id);
 418         if(SUCCEEDED(hres)) {
 419             hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, 0, NULL, &prim);
 420             if(FAILED(hres)) {
 421                 WARN("call error - forwarding exception\n");
 422                 jsdisp_release(jsdisp);
 423                 return hres;
 424             }else if(!is_object_instance(prim)) {
 425                 jsdisp_release(jsdisp);
 426                 *ret = prim;
 427                 return S_OK;
 428             }else {
 429                 IDispatch_Release(get_object(prim));
 430             }
 431         }
 432
 433         jsdisp_release(jsdisp);
 434
 435         WARN("failed\n");
 436         return throw_type_error(ctx, JS_E_TO_PRIMITIVE, NULL);
 437     }
 438
 439     return jsval_copy(val, ret);
 440
 441 }
 442
 443 /* ECMA-262 3rd Edition    9.2 */
 444 HRESULT to_boolean(jsval_t val, BOOL *ret)
 445 {
 446     switch(jsval_type(val)) {
 447     case JSV_UNDEFINED:
 448     case JSV_NULL:
 449         *ret = FALSE;
 450         return S_OK;
 451     case JSV_OBJECT:
 452         *ret = get_object(val) != NULL;
 453         return S_OK;
 454     case JSV_STRING:
 455         *ret = jsstr_length(get_string(val)) != 0;
 456         return S_OK;
 457     case JSV_NUMBER:
 458         *ret = !isnan(get_number(val)) && get_number(val);
 459         return S_OK;
 460     case JSV_BOOL:
 461         *ret = get_bool(val);
 462         return S_OK;
 463     case JSV_VARIANT:
 464         FIXME("unimplemented for variant %s\n", debugstr_variant(get_variant(val)));
 465         return E_NOTIMPL;
 466     }
 467
 468     assert(0);
 469     return E_FAIL;
 470 }
 471
 472 static int hex_to_int(WCHAR c)
 473 {
 474     if('0' <= c && c <= '9')
 475         return c-'0';
 476
 477     if('a' <= c && c <= 'f')
 478         return c-'a'+10;
 479
 480     if('A' <= c && c <= 'F')
 481         return c-'A'+10;
 482
 483     return -1;
 484 }
 485
 486 /* ECMA-262 3rd Edition    9.3.1 */
 487 static HRESULT str_to_number(jsstr_t *str, double *ret)
 488 {
 489     const WCHAR *ptr;
 490     BOOL neg = FALSE;
 491     DOUBLE d = 0.0;
 492
 493     static const WCHAR infinityW[] = {'I','n','f','i','n','i','t','y'};
 494
 495     ptr = jsstr_flatten(str);
 496     if(!ptr)
 497         return E_OUTOFMEMORY;
 498
 499     while(isspaceW(*ptr))
 500         ptr++;
 501
 502     if(*ptr == '-') {
 503         neg = TRUE;
 504         ptr++;
 505     }else if(*ptr == '+') {
 506         ptr++;
 507     }
 508
 509     if(!strncmpW(ptr, infinityW, sizeof(infinityW)/sizeof(WCHAR))) {
 510         ptr += sizeof(infinityW)/sizeof(WCHAR);
 511         while(*ptr && isspaceW(*ptr))
 512             ptr++;
 513
 514         if(*ptr)
 515             *ret = NAN;
 516         else
 517             *ret = neg ? -INFINITY : INFINITY;
 518         return S_OK;
 519     }
 520
 521     if(*ptr == '0' && ptr[1] == 'x') {
 522         DWORD l = 0;
 523
 524         ptr += 2;
 525         while((l = hex_to_int(*ptr)) != -1) {
 526             d = d*16 + l;
 527             ptr++;
 528         }
 529
 530         *ret = d;
 531         return S_OK;
 532     }
 533
 534     while(isdigitW(*ptr))
 535         d = d*10 + (*ptr++ - '0');
 536
 537     if(*ptr == 'e' || *ptr == 'E') {
 538         BOOL eneg = FALSE;
 539         LONG l = 0;
 540
 541         ptr++;
 542         if(*ptr == '-') {
 543             ptr++;
 544             eneg = TRUE;
 545         }else if(*ptr == '+') {
 546             ptr++;
 547         }
 548
 549         while(isdigitW(*ptr))
 550             l = l*10 + (*ptr++ - '0');
 551         if(eneg)
 552             l = -l;
 553
 554         d *= pow(10, l);
 555     }else if(*ptr == '.') {
 556         DOUBLE dec = 0.1;
 557
 558         ptr++;
 559         while(isdigitW(*ptr)) {
 560             d += dec * (*ptr++ - '0');
 561             dec *= 0.1;
 562         }
 563     }
 564
 565     while(isspaceW(*ptr))
 566         ptr++;
 567
 568     if(*ptr) {
 569         *ret = NAN;
 570         return S_OK;
 571     }
 572
 573     if(neg)
 574         d = -d;
 575
 576     *ret = d;
 577     return S_OK;
 578 }
 579
 580 /* ECMA-262 3rd Edition    9.3 */
 581 HRESULT to_number(script_ctx_t *ctx, jsval_t val, double *ret)
 582 {
 583     switch(jsval_type(val)) {
 584     case JSV_UNDEFINED:
 585         *ret = NAN;
 586         return S_OK;
 587     case JSV_NULL:
 588         *ret = 0;
 589         return S_OK;
 590     case JSV_NUMBER:
 591         *ret = get_number(val);
 592         return S_OK;
 593     case JSV_STRING:
 594         return str_to_number(get_string(val), ret);
 595     case JSV_OBJECT: {
 596         jsval_t prim;
 597         HRESULT hres;
 598
 599         hres = to_primitive(ctx, val, &prim, HINT_NUMBER);
 600         if(FAILED(hres))
 601             return hres;
 602
 603         hres = to_number(ctx, prim, ret);
 604         jsval_release(prim);
 605         return hres;
 606     }
 607     case JSV_BOOL:
 608         *ret = get_bool(val) ? 1 : 0;
 609         return S_OK;
 610     case JSV_VARIANT:
 611         FIXME("unimplemented for variant %s\n", debugstr_variant(get_variant(val)));
 612         return E_NOTIMPL;
 613     };
 614
 615     assert(0);
 616     return E_FAIL;
 617 }
 618
 619 /* ECMA-262 3rd Edition    9.4 */
 620 HRESULT to_integer(script_ctx_t *ctx, jsval_t v, double *ret)
 621 {
 622     double n;
 623     HRESULT hres;
 624
 625     hres = to_number(ctx, v, &n);
 626     if(FAILED(hres))
 627         return hres;
 628
 629     if(isnan(n))
 630         *ret = 0;
 631     else
 632         *ret = n >= 0.0 ? floor(n) : -floor(-n);
 633     return S_OK;
 634 }
 635
 636 /* ECMA-262 3rd Edition    9.5 */
 637 HRESULT to_int32(script_ctx_t *ctx, jsval_t v, INT *ret)
 638 {
 639     double n;
 640     HRESULT hres;
 641
 642     hres = to_number(ctx, v, &n);
 643     if(FAILED(hres))
 644         return hres;
 645
 646     *ret = is_finite(n) ? n : 0;
 647     return S_OK;
 648 }
 649
 650 /* ECMA-262 3rd Edition    9.6 */
 651 HRESULT to_uint32(script_ctx_t *ctx, jsval_t val, DWORD *ret)
 652 {
 653     INT32 n;
 654     HRESULT hres;
 655
 656     hres = to_int32(ctx, val, &n);
 657     if(SUCCEEDED(hres))
 658         *ret = n;
 659     return hres;
 660 }
 661
 662 static jsstr_t *int_to_string(int i)
 663 {
 664     WCHAR buf[12], *p;
 665     BOOL neg = FALSE;
 666
 667     if(!i) {
 668         static const WCHAR zeroW[] = {'0',0};
 669         return jsstr_alloc(zeroW);
 670     }
 671
 672     if(i < 0) {
 673         neg = TRUE;
 674         i = -i;
 675     }
 676
 677     p = buf + sizeof(buf)/sizeof(*buf)-1;
 678     *p-- = 0;
 679     while(i) {
 680         *p-- = i%10 + '0';
 681         i /= 10;
 682     }
 683
 684     if(neg)
 685         *p = '-';
 686     else
 687         p++;
 688
 689     return jsstr_alloc(p);
 690 }
 691
 692 HRESULT double_to_string(double n, jsstr_t **str)
 693 {
 694     const WCHAR InfinityW[] = {'-','I','n','f','i','n','i','t','y',0};
 695
 696     if(isnan(n)) {
 697         *str = jsstr_nan();
 698     }else if(isinf(n)) {
 699         *str = jsstr_alloc(n<0 ? InfinityW : InfinityW+1);
 700     }else if(is_int32(n)) {
 701         *str = int_to_string(n);
 702     }else {
 703         VARIANT strv, v;
 704         HRESULT hres;
 705
 706         /* FIXME: Don't use VariantChangeTypeEx */
 707         V_VT(&v) = VT_R8;
 708         V_R8(&v) = n;
 709         V_VT(&strv) = VT_EMPTY;
 710         hres = VariantChangeTypeEx(&strv, &v, MAKELCID(MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US),SORT_DEFAULT), 0, VT_BSTR);
 711         if(FAILED(hres))
 712             return hres;
 713
 714         *str = jsstr_alloc(V_BSTR(&strv));
 715         SysFreeString(V_BSTR(&strv));
 716     }
 717
 718     return *str ? S_OK : E_OUTOFMEMORY;
 719 }
 720
 721 /* ECMA-262 3rd Edition    9.8 */
 722 HRESULT to_string(script_ctx_t *ctx, jsval_t val, jsstr_t **str)
 723 {
 724     const WCHAR nullW[] = {'n','u','l','l',0};
 725     const WCHAR trueW[] = {'t','r','u','e',0};
 726     const WCHAR falseW[] = {'f','a','l','s','e',0};
 727
 728     switch(jsval_type(val)) {
 729     case JSV_UNDEFINED:
 730         *str = jsstr_undefined();
 731         return S_OK;
 732     case JSV_NULL:
 733         *str = jsstr_alloc(nullW);
 734         break;
 735     case JSV_NUMBER:
 736         return double_to_string(get_number(val), str);
 737     case JSV_STRING:
 738         *str = jsstr_addref(get_string(val));
 739         break;
 740     case JSV_OBJECT: {
 741         jsval_t prim;
 742         HRESULT hres;
 743
 744         hres = to_primitive(ctx, val, &prim, HINT_STRING);
 745         if(FAILED(hres))
 746             return hres;
 747
 748         hres = to_string(ctx, prim, str);
 749         jsval_release(prim);
 750         return hres;
 751     }
 752     case JSV_BOOL:
 753         *str = jsstr_alloc(get_bool(val) ? trueW : falseW);
 754         break;
 755     default:
 756         FIXME("unsupported %s\n", debugstr_jsval(val));
 757         return E_NOTIMPL;
 758     }
 759
 760     return *str ? S_OK : E_OUTOFMEMORY;
 761 }
 762
 763 HRESULT to_flat_string(script_ctx_t *ctx, jsval_t val, jsstr_t **str, const WCHAR **ret_str)
 764 {
 765     HRESULT hres;
 766
 767     hres = to_string(ctx, val, str);
 768     if(FAILED(hres))
 769         return hres;
 770
 771     *ret_str = jsstr_flatten(*str);
 772     if(!*ret_str) {
 773         jsstr_release(*str);
 774         return E_OUTOFMEMORY;
 775     }
 776
 777     return S_OK;
 778 }
 779
 780 /* ECMA-262 3rd Edition    9.9 */
 781 HRESULT to_object(script_ctx_t *ctx, jsval_t val, IDispatch **disp)
 782 {
 783     jsdisp_t *dispex;
 784     HRESULT hres;
 785
 786     switch(jsval_type(val)) {
 787     case JSV_STRING:
 788         hres = create_string(ctx, get_string(val), &dispex);
 789         if(FAILED(hres))
 790             return hres;
 791
 792         *disp = to_disp(dispex);
 793         break;
 794     case JSV_NUMBER:
 795         hres = create_number(ctx, get_number(val), &dispex);
 796         if(FAILED(hres))
 797             return hres;
 798
 799         *disp = to_disp(dispex);
 800         break;
 801     case JSV_OBJECT:
 802         if(get_object(val)) {
 803             *disp = get_object(val);
 804             IDispatch_AddRef(*disp);
 805         }else {
 806             jsdisp_t *obj;
 807
 808             hres = create_object(ctx, NULL, &obj);
 809             if(FAILED(hres))
 810                 return hres;
 811
 812             *disp = to_disp(obj);
 813         }
 814         break;
 815     case JSV_BOOL:
 816         hres = create_bool(ctx, get_bool(val), &dispex);
 817         if(FAILED(hres))
 818             return hres;
 819
 820         *disp = to_disp(dispex);
 821         break;
 822     case JSV_UNDEFINED:
 823     case JSV_NULL:
 824         WARN("object expected\n");
 825         return throw_type_error(ctx, JS_E_OBJECT_EXPECTED, NULL);
 826     case JSV_VARIANT:
 827         switch(V_VT(get_variant(val))) {
 828         case VT_ARRAY|VT_VARIANT:
 829             hres = create_vbarray(ctx, V_ARRAY(get_variant(val)), &dispex);
 830             if(FAILED(hres))
 831                 return hres;
 832
 833             *disp = to_disp(dispex);
 834             break;
 835
 836         default:
 837             FIXME("Unsupported %s\n", debugstr_variant(get_variant(val)));
 838             return E_NOTIMPL;
 839         }
 840         break;
 841     }
 842
 843     return S_OK;
 844 }
 845
 846 HRESULT variant_change_type(script_ctx_t *ctx, VARIANT *dst, VARIANT *src, VARTYPE vt)
 847 {
 848     jsval_t val;
 849     HRESULT hres;
 850
 851     clear_ei(ctx);
 852     hres = variant_to_jsval(src, &val);
 853     if(FAILED(hres))
 854         return hres;
 855
 856     switch(vt) {
 857     case VT_I2:
 858     case VT_I4: {
 859         INT i;
 860
 861         hres = to_int32(ctx, val, &i);
 862         if(SUCCEEDED(hres)) {
 863             if(vt == VT_I4)
 864                 V_I4(dst) = i;
 865             else
 866                 V_I2(dst) = i;
 867         }
 868         break;
 869     }
 870     case VT_R8: {
 871         double n;
 872         hres = to_number(ctx, val, &n);
 873         if(SUCCEEDED(hres))
 874             V_R8(dst) = n;
 875         break;
 876     }
 877     case VT_R4: {
 878         double n;
 879
 880         hres = to_number(ctx, val, &n);
 881         if(SUCCEEDED(hres))
 882             V_R4(dst) = n;
 883         break;
 884     }
 885     case VT_BOOL: {
 886         BOOL b;
 887
 888         hres = to_boolean(val, &b);
 889         if(SUCCEEDED(hres))
 890             V_BOOL(dst) = b ? VARIANT_TRUE : VARIANT_FALSE;
 891         break;
 892     }
 893     case VT_BSTR: {
 894         jsstr_t *str;
 895
 896         hres = to_string(ctx, val, &str);
 897         if(FAILED(hres))
 898             break;
 899
 900         if(is_null_bstr(str)) {
 901             V_BSTR(dst) = NULL;
 902             break;
 903         }
 904
 905         V_BSTR(dst) = SysAllocStringLen(NULL, jsstr_length(str));
 906         if(V_BSTR(dst))
 907             jsstr_flush(str, V_BSTR(dst));
 908         else
 909             hres = E_OUTOFMEMORY;
 910         break;
 911     }
 912     case VT_EMPTY:
 913         hres = V_VT(src) == VT_EMPTY ? S_OK : E_NOTIMPL;
 914         break;
 915     case VT_NULL:
 916         hres = V_VT(src) == VT_NULL ? S_OK : E_NOTIMPL;
 917         break;
 918     default:
 919         FIXME("vt %d not implemented\n", vt);
 920         hres = E_NOTIMPL;
 921     }
 922
 923     jsval_release(val);
 924     if(FAILED(hres))
 925         return hres;
 926
 927     V_VT(dst) = vt;
 928     return S_OK;
 929 }
 930
 931 static inline JSCaller *impl_from_IServiceProvider(IServiceProvider *iface)
 932 {
 933     return CONTAINING_RECORD(iface, JSCaller, IServiceProvider_iface);
 934 }
 935
 936 static HRESULT WINAPI JSCaller_QueryInterface(IServiceProvider *iface, REFIID riid, void **ppv)
 937 {
 938     JSCaller *This = impl_from_IServiceProvider(iface);
 939
 940     if(IsEqualGUID(&IID_IUnknown, riid)) {
 941         TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv);
 942         *ppv = &This->IServiceProvider_iface;
 943     }else if(IsEqualGUID(&IID_IServiceProvider, riid)) {
 944         TRACE("(%p)->(IID_IServiceProvider %p)\n", This, ppv);
 945         *ppv = &This->IServiceProvider_iface;
 946     }else {
 947         WARN("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppv);
 948         *ppv = NULL;
 949         return E_NOINTERFACE;
 950     }
 951
 952     IUnknown_AddRef((IUnknown*)*ppv);
 953     return S_OK;
 954 }
 955
 956 static ULONG WINAPI JSCaller_AddRef(IServiceProvider *iface)
 957 {
 958     JSCaller *This = impl_from_IServiceProvider(iface);
 959     LONG ref = InterlockedIncrement(&This->ref);
 960
 961     TRACE("(%p) ref=%d\n", This, ref);
 962
 963     return ref;
 964 }
 965
 966 static ULONG WINAPI JSCaller_Release(IServiceProvider *iface)
 967 {
 968     JSCaller *This = impl_from_IServiceProvider(iface);
 969     LONG ref = InterlockedIncrement(&This->ref);
 970
 971     TRACE("(%p) ref=%d\n", This, ref);
 972
 973     if(!ref) {
 974         assert(!This->ctx);
 975         heap_free(This);
 976     }
 977
 978     return ref;
 979 }
 980
 981 static HRESULT WINAPI JSCaller_QueryService(IServiceProvider *iface, REFGUID guidService,
 982         REFIID riid, void **ppv)
 983 {
 984     JSCaller *This = impl_from_IServiceProvider(iface);
 985
 986     if(IsEqualGUID(guidService, &SID_VariantConversion) && This->ctx && This->ctx->active_script) {
 987         TRACE("(%p)->(SID_VariantConversion)\n", This);
 988         return IActiveScript_QueryInterface(This->ctx->active_script, riid, ppv);
 989     }
 990
 991     FIXME("(%p)->(%s %s %p)\n", This, debugstr_guid(guidService), debugstr_guid(riid), ppv);
 992
 993     *ppv = NULL;
 994     return E_NOINTERFACE;
 995 }
 996
 997 static const IServiceProviderVtbl ServiceProviderVtbl = {
 998     JSCaller_QueryInterface,
 999     JSCaller_AddRef,
1000     JSCaller_Release,
1001     JSCaller_QueryService
1002 };
1003
1004 HRESULT create_jscaller(script_ctx_t *ctx)
1005 {
1006     JSCaller *ret;
1007
1008     ret = heap_alloc(sizeof(*ret));
1009     if(!ret)
1010         return E_OUTOFMEMORY;
1011
1012     ret->IServiceProvider_iface.lpVtbl = &ServiceProviderVtbl;
1013     ret->ref = 1;
1014     ret->ctx = ctx;
1015
1016     ctx->jscaller = ret;
1017     return S_OK;
1018 }