dlls/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 "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 WINE_DECLARE_DEBUG_CHANNEL(heap);
  32
  33 const char *debugstr_jsval(const jsval_t v)
  34 {
  35     switch(jsval_type(v)) {
  36     case JSV_UNDEFINED:
  37         return "undefined";
  38     case JSV_NULL:
  39         return "null";
  40     case JSV_OBJECT:
  41         return wine_dbg_sprintf("obj(%p)", get_object(v));
  42     case JSV_STRING:
  43         return wine_dbg_sprintf("str(%s)", debugstr_jsstr(get_string(v)));
  44     case JSV_NUMBER:
  45         return wine_dbg_sprintf("%lf", get_number(v));
  46     case JSV_BOOL:
  47         return get_bool(v) ? "true" : "false";
  48     case JSV_VARIANT:
  49         return debugstr_variant(get_variant(v));
  50     }
  51
  52     assert(0);
  53     return NULL;
  54 }
  55
  56 BOOL is_finite(double n)
  57 {
  58     return !isnan(n) && !isinf(n);
  59 }
  60
  61 #define MIN_BLOCK_SIZE  128
  62 #define ARENA_FREE_FILLER  0xaa
  63
  64 static inline DWORD block_size(DWORD block)
  65 {
  66     return MIN_BLOCK_SIZE << block;
  67 }
  68
  69 void heap_pool_init(heap_pool_t *heap)
  70 {
  71     memset(heap, 0, sizeof(*heap));
  72     list_init(&heap->custom_blocks);
  73 }
  74
  75 void *heap_pool_alloc(heap_pool_t *heap, DWORD size)
  76 {
  77     struct list *list;
  78     void *tmp;
  79
  80     if(!heap->block_cnt) {
  81         if(!heap->blocks) {
  82             heap->blocks = heap_alloc(sizeof(void*));
  83             if(!heap->blocks)
  84                 return NULL;
  85         }
  86
  87         tmp = heap_alloc(block_size(0));
  88         if(!tmp)
  89             return NULL;
  90
  91         heap->blocks[0] = tmp;
  92         heap->block_cnt = 1;
  93     }
  94
  95     if(heap->offset + size <= block_size(heap->last_block)) {
  96         tmp = ((BYTE*)heap->blocks[heap->last_block])+heap->offset;
  97         heap->offset += size;
  98         return tmp;
  99     }
 100
 101     if(size <= block_size(heap->last_block+1)) {
 102         if(heap->last_block+1 == heap->block_cnt) {
 103             tmp = heap_realloc(heap->blocks, (heap->block_cnt+1)*sizeof(void*));
 104             if(!tmp)
 105                 return NULL;
 106
 107             heap->blocks = tmp;
 108             heap->blocks[heap->block_cnt] = heap_alloc(block_size(heap->block_cnt));
 109             if(!heap->blocks[heap->block_cnt])
 110                 return NULL;
 111
 112             heap->block_cnt++;
 113         }
 114
 115         heap->last_block++;
 116         heap->offset = size;
 117         return heap->blocks[heap->last_block];
 118     }
 119
 120     list = heap_alloc(size + sizeof(struct list));
 121     if(!list)
 122         return NULL;
 123
 124     list_add_head(&heap->custom_blocks, list);
 125     return list+1;
 126 }
 127
 128 void *heap_pool_grow(heap_pool_t *heap, void *mem, DWORD size, DWORD inc)
 129 {
 130     void *ret;
 131
 132     if(mem == (BYTE*)heap->blocks[heap->last_block] + heap->offset-size
 133        && heap->offset+inc < block_size(heap->last_block)) {
 134         heap->offset += inc;
 135         return mem;
 136     }
 137
 138     ret = heap_pool_alloc(heap, size+inc);
 139     if(ret) /* FIXME: avoid copying for custom blocks */
 140         memcpy(ret, mem, size);
 141     return ret;
 142 }
 143
 144 void heap_pool_clear(heap_pool_t *heap)
 145 {
 146     struct list *tmp;
 147
 148     if(!heap)
 149         return;
 150
 151     while((tmp = list_next(&heap->custom_blocks, &heap->custom_blocks))) {
 152         list_remove(tmp);
 153         heap_free(tmp);
 154     }
 155
 156     if(WARN_ON(heap)) {
 157         DWORD i;
 158
 159         for(i=0; i < heap->block_cnt; i++)
 160             memset(heap->blocks[i], ARENA_FREE_FILLER, block_size(i));
 161     }
 162
 163     heap->last_block = heap->offset = 0;
 164     heap->mark = FALSE;
 165 }
 166
 167 void heap_pool_free(heap_pool_t *heap)
 168 {
 169     DWORD i;
 170
 171     heap_pool_clear(heap);
 172
 173     for(i=0; i < heap->block_cnt; i++)
 174         heap_free(heap->blocks[i]);
 175     heap_free(heap->blocks);
 176
 177     heap_pool_init(heap);
 178 }
 179
 180 heap_pool_t *heap_pool_mark(heap_pool_t *heap)
 181 {
 182     if(heap->mark)
 183         return NULL;
 184
 185     heap->mark = TRUE;
 186     return heap;
 187 }
 188
 189 void jsval_release(jsval_t val)
 190 {
 191     switch(jsval_type(val)) {
 192     case JSV_OBJECT:
 193         if(get_object(val))
 194             IDispatch_Release(get_object(val));
 195         break;
 196     case JSV_STRING:
 197         jsstr_release(get_string(val));
 198         break;
 199     case JSV_VARIANT:
 200         VariantClear(get_variant(val));
 201         heap_free(get_variant(val));
 202         break;
 203     default:
 204         break;
 205     }
 206 }
 207
 208 static HRESULT jsval_variant(jsval_t *val, VARIANT *var)
 209 {
 210     VARIANT *v;
 211     HRESULT hres;
 212
 213     __JSVAL_TYPE(*val) = JSV_VARIANT;
 214     __JSVAL_VAR(*val) = v = heap_alloc(sizeof(VARIANT));
 215     if(!v)
 216         return E_OUTOFMEMORY;
 217
 218     V_VT(v) = VT_EMPTY;
 219     hres = VariantCopy(v, var);
 220     if(FAILED(hres))
 221         heap_free(v);
 222     return hres;
 223 }
 224
 225 HRESULT jsval_copy(jsval_t v, jsval_t *r)
 226 {
 227     switch(jsval_type(v)) {
 228     case JSV_UNDEFINED:
 229     case JSV_NULL:
 230     case JSV_NUMBER:
 231     case JSV_BOOL:
 232         *r = v;
 233         return S_OK;
 234     case JSV_OBJECT:
 235         if(get_object(v))
 236             IDispatch_AddRef(get_object(v));
 237         *r = v;
 238         return S_OK;
 239     case JSV_STRING: {
 240         jsstr_addref(get_string(v));
 241         *r = v;
 242         return S_OK;
 243     }
 244     case JSV_VARIANT:
 245         return jsval_variant(r, get_variant(v));
 246     }
 247
 248     assert(0);
 249     return E_FAIL;
 250 }
 251
 252 HRESULT variant_to_jsval(VARIANT *var, jsval_t *r)
 253 {
 254     if(V_VT(var) == (VT_VARIANT|VT_BYREF))
 255         var = V_VARIANTREF(var);
 256
 257     switch(V_VT(var)) {
 258     case VT_EMPTY:
 259         *r = jsval_undefined();
 260         return S_OK;
 261     case VT_NULL:
 262         *r = jsval_null();
 263         return S_OK;
 264     case VT_BOOL:
 265         *r = jsval_bool(V_BOOL(var));
 266         return S_OK;
 267     case VT_I4:
 268         *r = jsval_number(V_I4(var));
 269         return S_OK;
 270     case VT_R8:
 271         *r = jsval_number(V_R8(var));
 272         return S_OK;
 273     case VT_BSTR: {
 274         jsstr_t *str;
 275
 276         if(V_BSTR(var)) {
 277             str = jsstr_alloc_len(V_BSTR(var), SysStringLen(V_BSTR(var)));
 278             if(!str)
 279                 return E_OUTOFMEMORY;
 280         }else {
 281             str = jsstr_null_bstr();
 282         }
 283
 284         *r = jsval_string(str);
 285         return S_OK;
 286     }
 287     case VT_DISPATCH: {
 288         if(V_DISPATCH(var))
 289             IDispatch_AddRef(V_DISPATCH(var));
 290         *r = jsval_disp(V_DISPATCH(var));
 291         return S_OK;
 292     }
 293     case VT_I2:
 294         *r = jsval_number(V_I2(var));
 295         return S_OK;
 296     case VT_INT:
 297         *r = jsval_number(V_INT(var));
 298         return S_OK;
 299     case VT_UI4:
 300         *r = jsval_number(V_UI4(var));
 301         return S_OK;
 302     case VT_UNKNOWN:
 303         if(V_UNKNOWN(var)) {
 304             IDispatch *disp;
 305             HRESULT hres;
 306
 307             hres = IUnknown_QueryInterface(V_UNKNOWN(var), &IID_IDispatch, (void**)&disp);
 308             if(SUCCEEDED(hres)) {
 309                 *r = jsval_disp(disp);
 310                 return S_OK;
 311             }
 312         }else {
 313             *r = jsval_disp(NULL);
 314             return S_OK;
 315         }
 316         /* fall through */
 317     default:
 318         return jsval_variant(r, var);
 319     }
 320 }
 321
 322 HRESULT jsval_to_variant(jsval_t val, VARIANT *retv)
 323 {
 324     switch(jsval_type(val)) {
 325     case JSV_UNDEFINED:
 326         V_VT(retv) = VT_EMPTY;
 327         return S_OK;
 328     case JSV_NULL:
 329         V_VT(retv) = VT_NULL;
 330         return S_OK;
 331     case JSV_OBJECT:
 332         V_VT(retv) = VT_DISPATCH;
 333         if(get_object(val))
 334             IDispatch_AddRef(get_object(val));
 335         V_DISPATCH(retv) = get_object(val);
 336         return S_OK;
 337     case JSV_STRING: {
 338         jsstr_t *str = get_string(val);
 339
 340         V_VT(retv) = VT_BSTR;
 341         if(is_null_bstr(str)) {
 342             V_BSTR(retv) = NULL;
 343         }else {
 344             V_BSTR(retv) = SysAllocStringLen(NULL, jsstr_length(str));
 345             if(V_BSTR(retv))
 346                 jsstr_flush(str, V_BSTR(retv));
 347             else
 348                 return E_OUTOFMEMORY;
 349         }
 350         return S_OK;
 351     }
 352     case JSV_NUMBER: {
 353         double n = get_number(val);
 354
 355         if(is_int32(n)) {
 356             V_VT(retv) = VT_I4;
 357             V_I4(retv) = n;
 358         }else {
 359             V_VT(retv) = VT_R8;
 360             V_R8(retv) = n;
 361         }
 362
 363         return S_OK;
 364     }
 365     case JSV_BOOL:
 366         V_VT(retv) = VT_BOOL;
 367         V_BOOL(retv) = get_bool(val) ? VARIANT_TRUE : VARIANT_FALSE;
 368         return S_OK;
 369     case JSV_VARIANT:
 370         V_VT(retv) = VT_EMPTY;
 371         return VariantCopy(retv, get_variant(val));
 372     }
 373
 374     assert(0);
 375     return E_FAIL;
 376 }
 377
 378 /* ECMA-262 3rd Edition    9.1 */
 379 HRESULT to_primitive(script_ctx_t *ctx, jsval_t val, jsval_t *ret, hint_t hint)
 380 {
 381     if(is_object_instance(val)) {
 382         jsdisp_t *jsdisp;
 383         jsval_t prim;
 384         DISPID id;
 385         HRESULT hres;
 386
 387         static const WCHAR toStringW[] = {'t','o','S','t','r','i','n','g',0};
 388         static const WCHAR valueOfW[] = {'v','a','l','u','e','O','f',0};
 389
 390         if(!get_object(val)) {
 391             *ret = jsval_null();
 392             return S_OK;
 393         }
 394
 395         jsdisp = iface_to_jsdisp((IUnknown*)get_object(val));
 396         if(!jsdisp)
 397             return disp_propget(ctx, get_object(val), DISPID_VALUE, ret);
 398
 399         if(hint == NO_HINT)
 400             hint = is_class(jsdisp, JSCLASS_DATE) ? HINT_STRING : HINT_NUMBER;
 401
 402         /* Native implementation doesn't throw TypeErrors, returns strange values */
 403
 404         hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? toStringW : valueOfW, 0, &id);
 405         if(SUCCEEDED(hres)) {
 406             hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, 0, NULL, &prim);
 407             if(FAILED(hres)) {
 408                 WARN("call error - forwarding exception\n");
 409                 jsdisp_release(jsdisp);
 410                 return hres;
 411             }else if(!is_object_instance(prim)) {
 412                 jsdisp_release(jsdisp);
 413                 *ret = prim;
 414                 return S_OK;
 415             }else {
 416                 IDispatch_Release(get_object(prim));
 417             }
 418         }
 419
 420         hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? valueOfW : toStringW, 0, &id);
 421         if(SUCCEEDED(hres)) {
 422             hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, 0, NULL, &prim);
 423             if(FAILED(hres)) {
 424                 WARN("call error - forwarding exception\n");
 425                 jsdisp_release(jsdisp);
 426                 return hres;
 427             }else if(!is_object_instance(prim)) {
 428                 jsdisp_release(jsdisp);
 429                 *ret = prim;
 430                 return S_OK;
 431             }else {
 432                 IDispatch_Release(get_object(prim));
 433             }
 434         }
 435
 436         jsdisp_release(jsdisp);
 437
 438         WARN("failed\n");
 439         return throw_type_error(ctx, JS_E_TO_PRIMITIVE, NULL);
 440     }
 441
 442     return jsval_copy(val, ret);
 443
 444 }
 445
 446 /* ECMA-262 3rd Edition    9.2 */
 447 HRESULT to_boolean(jsval_t val, BOOL *ret)
 448 {
 449     switch(jsval_type(val)) {
 450     case JSV_UNDEFINED:
 451     case JSV_NULL:
 452         *ret = FALSE;
 453         return S_OK;
 454     case JSV_OBJECT:
 455         *ret = get_object(val) != NULL;
 456         return S_OK;
 457     case JSV_STRING:
 458         *ret = jsstr_length(get_string(val)) != 0;
 459         return S_OK;
 460     case JSV_NUMBER:
 461         *ret = !isnan(get_number(val)) && get_number(val);
 462         return S_OK;
 463     case JSV_BOOL:
 464         *ret = get_bool(val);
 465         return S_OK;
 466     case JSV_VARIANT:
 467         FIXME("unimplemented for variant %s\n", debugstr_variant(get_variant(val)));
 468         return E_NOTIMPL;
 469     }
 470
 471     assert(0);
 472     return E_FAIL;
 473 }
 474
 475 static int hex_to_int(WCHAR c)
 476 {
 477     if('0' <= c && c <= '9')
 478         return c-'0';
 479
 480     if('a' <= c && c <= 'f')
 481         return c-'a'+10;
 482
 483     if('A' <= c && c <= 'F')
 484         return c-'A'+10;
 485
 486     return -1;
 487 }
 488
 489 /* ECMA-262 3rd Edition    9.3.1 */
 490 static HRESULT str_to_number(jsstr_t *str, double *ret)
 491 {
 492     const WCHAR *ptr;
 493     BOOL neg = FALSE;
 494     DOUBLE d = 0.0;
 495
 496     static const WCHAR infinityW[] = {'I','n','f','i','n','i','t','y'};
 497
 498     ptr = jsstr_flatten(str);
 499     if(!ptr)
 500         return E_OUTOFMEMORY;
 501
 502     while(isspaceW(*ptr))
 503         ptr++;
 504
 505     if(*ptr == '-') {
 506         neg = TRUE;
 507         ptr++;
 508     }else if(*ptr == '+') {
 509         ptr++;
 510     }
 511
 512     if(!strncmpW(ptr, infinityW, sizeof(infinityW)/sizeof(WCHAR))) {
 513         ptr += sizeof(infinityW)/sizeof(WCHAR);
 514         while(*ptr && isspaceW(*ptr))
 515             ptr++;
 516
 517         if(*ptr)
 518             *ret = NAN;
 519         else
 520             *ret = neg ? -INFINITY : INFINITY;
 521         return S_OK;
 522     }
 523
 524     if(*ptr == '0' && ptr[1] == 'x') {
 525         DWORD l = 0;
 526
 527         ptr += 2;
 528         while((l = hex_to_int(*ptr)) != -1) {
 529             d = d*16 + l;
 530             ptr++;
 531         }
 532
 533         *ret = d;
 534         return S_OK;
 535     }
 536
 537     while(isdigitW(*ptr))
 538         d = d*10 + (*ptr++ - '0');
 539
 540     if(*ptr == 'e' || *ptr == 'E') {
 541         BOOL eneg = FALSE;
 542         LONG l = 0;
 543
 544         ptr++;
 545         if(*ptr == '-') {
 546             ptr++;
 547             eneg = TRUE;
 548         }else if(*ptr == '+') {
 549             ptr++;
 550         }
 551
 552         while(isdigitW(*ptr))
 553             l = l*10 + (*ptr++ - '0');
 554         if(eneg)
 555             l = -l;
 556
 557         d *= pow(10, l);
 558     }else if(*ptr == '.') {
 559         DOUBLE dec = 0.1;
 560
 561         ptr++;
 562         while(isdigitW(*ptr)) {
 563             d += dec * (*ptr++ - '0');
 564             dec *= 0.1;
 565         }
 566     }
 567
 568     while(isspaceW(*ptr))
 569         ptr++;
 570
 571     if(*ptr) {
 572         *ret = NAN;
 573         return S_OK;
 574     }
 575
 576     if(neg)
 577         d = -d;
 578
 579     *ret = d;
 580     return S_OK;
 581 }
 582
 583 /* ECMA-262 3rd Edition    9.3 */
 584 HRESULT to_number(script_ctx_t *ctx, jsval_t val, double *ret)
 585 {
 586     switch(jsval_type(val)) {
 587     case JSV_UNDEFINED:
 588         *ret = NAN;
 589         return S_OK;
 590     case JSV_NULL:
 591         *ret = 0;
 592         return S_OK;
 593     case JSV_NUMBER:
 594         *ret = get_number(val);
 595         return S_OK;
 596     case JSV_STRING:
 597         return str_to_number(get_string(val), ret);
 598     case JSV_OBJECT: {
 599         jsval_t prim;
 600         HRESULT hres;
 601
 602         hres = to_primitive(ctx, val, &prim, HINT_NUMBER);
 603         if(FAILED(hres))
 604             return hres;
 605
 606         hres = to_number(ctx, prim, ret);
 607         jsval_release(prim);
 608         return hres;
 609     }
 610     case JSV_BOOL:
 611         *ret = get_bool(val) ? 1 : 0;
 612         return S_OK;
 613     case JSV_VARIANT:
 614         FIXME("unimplemented for variant %s\n", debugstr_variant(get_variant(val)));
 615         return E_NOTIMPL;
 616     };
 617
 618     assert(0);
 619     return E_FAIL;
 620 }
 621
 622 /* ECMA-262 3rd Edition    9.4 */
 623 HRESULT to_integer(script_ctx_t *ctx, jsval_t v, double *ret)
 624 {
 625     double n;
 626     HRESULT hres;
 627
 628     hres = to_number(ctx, v, &n);
 629     if(FAILED(hres))
 630         return hres;
 631
 632     if(isnan(n))
 633         *ret = 0;
 634     else
 635         *ret = n >= 0.0 ? floor(n) : -floor(-n);
 636     return S_OK;
 637 }
 638
 639 /* ECMA-262 3rd Edition    9.5 */
 640 HRESULT to_int32(script_ctx_t *ctx, jsval_t v, INT *ret)
 641 {
 642     double n;
 643     HRESULT hres;
 644
 645     hres = to_number(ctx, v, &n);
 646     if(FAILED(hres))
 647         return hres;
 648
 649     *ret = is_finite(n) ? n : 0;
 650     return S_OK;
 651 }
 652
 653 /* ECMA-262 3rd Edition    9.6 */
 654 HRESULT to_uint32(script_ctx_t *ctx, jsval_t val, DWORD *ret)
 655 {
 656     INT32 n;
 657     HRESULT hres;
 658
 659     hres = to_int32(ctx, val, &n);
 660     if(SUCCEEDED(hres))
 661         *ret = n;
 662     return hres;
 663 }
 664
 665 static jsstr_t *int_to_string(int i)
 666 {
 667     WCHAR buf[12], *p;
 668     BOOL neg = FALSE;
 669
 670     if(!i) {
 671         static const WCHAR zeroW[] = {'0',0};
 672         return jsstr_alloc(zeroW);
 673     }
 674
 675     if(i < 0) {
 676         neg = TRUE;
 677         i = -i;
 678     }
 679
 680     p = buf + sizeof(buf)/sizeof(*buf)-1;
 681     *p-- = 0;
 682     while(i) {
 683         *p-- = i%10 + '0';
 684         i /= 10;
 685     }
 686
 687     if(neg)
 688         *p = '-';
 689     else
 690         p++;
 691
 692     return jsstr_alloc(p);
 693 }
 694
 695 HRESULT double_to_string(double n, jsstr_t **str)
 696 {
 697     const WCHAR InfinityW[] = {'-','I','n','f','i','n','i','t','y',0};
 698
 699     if(isnan(n)) {
 700         *str = jsstr_nan();
 701     }else if(isinf(n)) {
 702         *str = jsstr_alloc(n<0 ? InfinityW : InfinityW+1);
 703     }else if(is_int32(n)) {
 704         *str = int_to_string(n);
 705     }else {
 706         VARIANT strv, v;
 707         HRESULT hres;
 708
 709         /* FIXME: Don't use VariantChangeTypeEx */
 710         V_VT(&v) = VT_R8;
 711         V_R8(&v) = n;
 712         V_VT(&strv) = VT_EMPTY;
 713         hres = VariantChangeTypeEx(&strv, &v, MAKELCID(MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US),SORT_DEFAULT), 0, VT_BSTR);
 714         if(FAILED(hres))
 715             return hres;
 716
 717         *str = jsstr_alloc(V_BSTR(&strv));
 718         SysFreeString(V_BSTR(&strv));
 719     }
 720
 721     return *str ? S_OK : E_OUTOFMEMORY;
 722 }
 723
 724 /* ECMA-262 3rd Edition    9.8 */
 725 HRESULT to_string(script_ctx_t *ctx, jsval_t val, jsstr_t **str)
 726 {
 727     const WCHAR nullW[] = {'n','u','l','l',0};
 728     const WCHAR trueW[] = {'t','r','u','e',0};
 729     const WCHAR falseW[] = {'f','a','l','s','e',0};
 730
 731     switch(jsval_type(val)) {
 732     case JSV_UNDEFINED:
 733         *str = jsstr_undefined();
 734         return S_OK;
 735     case JSV_NULL:
 736         *str = jsstr_alloc(nullW);
 737         break;
 738     case JSV_NUMBER:
 739         return double_to_string(get_number(val), str);
 740     case JSV_STRING:
 741         *str = jsstr_addref(get_string(val));
 742         break;
 743     case JSV_OBJECT: {
 744         jsval_t prim;
 745         HRESULT hres;
 746
 747         hres = to_primitive(ctx, val, &prim, HINT_STRING);
 748         if(FAILED(hres))
 749             return hres;
 750
 751         hres = to_string(ctx, prim, str);
 752         jsval_release(prim);
 753         return hres;
 754     }
 755     case JSV_BOOL:
 756         *str = jsstr_alloc(get_bool(val) ? trueW : falseW);
 757         break;
 758     default:
 759         FIXME("unsupported %s\n", debugstr_jsval(val));
 760         return E_NOTIMPL;
 761     }
 762
 763     return *str ? S_OK : E_OUTOFMEMORY;
 764 }
 765
 766 HRESULT to_flat_string(script_ctx_t *ctx, jsval_t val, jsstr_t **str, const WCHAR **ret_str)
 767 {
 768     HRESULT hres;
 769
 770     hres = to_string(ctx, val, str);
 771     if(FAILED(hres))
 772         return hres;
 773
 774     *ret_str = jsstr_flatten(*str);
 775     if(!*ret_str) {
 776         jsstr_release(*str);
 777         return E_OUTOFMEMORY;
 778     }
 779
 780     return S_OK;
 781 }
 782
 783 /* ECMA-262 3rd Edition    9.9 */
 784 HRESULT to_object(script_ctx_t *ctx, jsval_t val, IDispatch **disp)
 785 {
 786     jsdisp_t *dispex;
 787     HRESULT hres;
 788
 789     switch(jsval_type(val)) {
 790     case JSV_STRING:
 791         hres = create_string(ctx, get_string(val), &dispex);
 792         if(FAILED(hres))
 793             return hres;
 794
 795         *disp = to_disp(dispex);
 796         break;
 797     case JSV_NUMBER:
 798         hres = create_number(ctx, get_number(val), &dispex);
 799         if(FAILED(hres))
 800             return hres;
 801
 802         *disp = to_disp(dispex);
 803         break;
 804     case JSV_OBJECT:
 805         if(get_object(val)) {
 806             *disp = get_object(val);
 807             IDispatch_AddRef(*disp);
 808         }else {
 809             jsdisp_t *obj;
 810
 811             hres = create_object(ctx, NULL, &obj);
 812             if(FAILED(hres))
 813                 return hres;
 814
 815             *disp = to_disp(obj);
 816         }
 817         break;
 818     case JSV_BOOL:
 819         hres = create_bool(ctx, get_bool(val), &dispex);
 820         if(FAILED(hres))
 821             return hres;
 822
 823         *disp = to_disp(dispex);
 824         break;
 825     case JSV_UNDEFINED:
 826     case JSV_NULL:
 827         WARN("object expected\n");
 828         return throw_type_error(ctx, JS_E_OBJECT_EXPECTED, NULL);
 829     case JSV_VARIANT:
 830         switch(V_VT(get_variant(val))) {
 831         case VT_ARRAY|VT_VARIANT:
 832             hres = create_vbarray(ctx, V_ARRAY(get_variant(val)), &dispex);
 833             if(FAILED(hres))
 834                 return hres;
 835
 836             *disp = to_disp(dispex);
 837             break;
 838
 839         default:
 840             FIXME("Unsupported %s\n", debugstr_variant(get_variant(val)));
 841             return E_NOTIMPL;
 842         }
 843         break;
 844     }
 845
 846     return S_OK;
 847 }
 848
 849 HRESULT variant_change_type(script_ctx_t *ctx, VARIANT *dst, VARIANT *src, VARTYPE vt)
 850 {
 851     jsval_t val;
 852     HRESULT hres;
 853
 854     clear_ei(ctx);
 855     hres = variant_to_jsval(src, &val);
 856     if(FAILED(hres))
 857         return hres;
 858
 859     switch(vt) {
 860     case VT_I2:
 861     case VT_I4: {
 862         INT i;
 863
 864         hres = to_int32(ctx, val, &i);
 865         if(SUCCEEDED(hres)) {
 866             if(vt == VT_I4)
 867                 V_I4(dst) = i;
 868             else
 869                 V_I2(dst) = i;
 870         }
 871         break;
 872     }
 873     case VT_R8: {
 874         double n;
 875         hres = to_number(ctx, val, &n);
 876         if(SUCCEEDED(hres))
 877             V_R8(dst) = n;
 878         break;
 879     }
 880     case VT_R4: {
 881         double n;
 882
 883         hres = to_number(ctx, val, &n);
 884         if(SUCCEEDED(hres))
 885             V_R4(dst) = n;
 886         break;
 887     }
 888     case VT_BOOL: {
 889         BOOL b;
 890
 891         hres = to_boolean(val, &b);
 892         if(SUCCEEDED(hres))
 893             V_BOOL(dst) = b ? VARIANT_TRUE : VARIANT_FALSE;
 894         break;
 895     }
 896     case VT_BSTR: {
 897         jsstr_t *str;
 898
 899         hres = to_string(ctx, val, &str);
 900         if(FAILED(hres))
 901             break;
 902
 903         if(is_null_bstr(str)) {
 904             V_BSTR(dst) = NULL;
 905             break;
 906         }
 907
 908         V_BSTR(dst) = SysAllocStringLen(NULL, jsstr_length(str));
 909         if(V_BSTR(dst))
 910             jsstr_flush(str, V_BSTR(dst));
 911         else
 912             hres = E_OUTOFMEMORY;
 913         break;
 914     }
 915     case VT_EMPTY:
 916         hres = V_VT(src) == VT_EMPTY ? S_OK : E_NOTIMPL;
 917         break;
 918     case VT_NULL:
 919         hres = V_VT(src) == VT_NULL ? S_OK : E_NOTIMPL;
 920         break;
 921     default:
 922         FIXME("vt %d not implemented\n", vt);
 923         hres = E_NOTIMPL;
 924     }
 925
 926     jsval_release(val);
 927     if(FAILED(hres))
 928         return hres;
 929
 930     V_VT(dst) = vt;
 931     return S_OK;
 932 }
 933
 934 static inline JSCaller *impl_from_IServiceProvider(IServiceProvider *iface)
 935 {
 936     return CONTAINING_RECORD(iface, JSCaller, IServiceProvider_iface);
 937 }
 938
 939 static HRESULT WINAPI JSCaller_QueryInterface(IServiceProvider *iface, REFIID riid, void **ppv)
 940 {
 941     JSCaller *This = impl_from_IServiceProvider(iface);
 942
 943     if(IsEqualGUID(&IID_IUnknown, riid)) {
 944         TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv);
 945         *ppv = &This->IServiceProvider_iface;
 946     }else if(IsEqualGUID(&IID_IServiceProvider, riid)) {
 947         TRACE("(%p)->(IID_IServiceProvider %p)\n", This, ppv);
 948         *ppv = &This->IServiceProvider_iface;
 949     }else {
 950         WARN("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppv);
 951         *ppv = NULL;
 952         return E_NOINTERFACE;
 953     }
 954
 955     IUnknown_AddRef((IUnknown*)*ppv);
 956     return S_OK;
 957 }
 958
 959 static ULONG WINAPI JSCaller_AddRef(IServiceProvider *iface)
 960 {
 961     JSCaller *This = impl_from_IServiceProvider(iface);
 962     LONG ref = InterlockedIncrement(&This->ref);
 963
 964     TRACE("(%p) ref=%d\n", This, ref);
 965
 966     return ref;
 967 }
 968
 969 static ULONG WINAPI JSCaller_Release(IServiceProvider *iface)
 970 {
 971     JSCaller *This = impl_from_IServiceProvider(iface);
 972     LONG ref = InterlockedIncrement(&This->ref);
 973
 974     TRACE("(%p) ref=%d\n", This, ref);
 975
 976     if(!ref) {
 977         assert(!This->ctx);
 978         heap_free(This);
 979     }
 980
 981     return ref;
 982 }
 983
 984 static HRESULT WINAPI JSCaller_QueryService(IServiceProvider *iface, REFGUID guidService,
 985         REFIID riid, void **ppv)
 986 {
 987     JSCaller *This = impl_from_IServiceProvider(iface);
 988
 989     if(IsEqualGUID(guidService, &SID_VariantConversion) && This->ctx && This->ctx->active_script) {
 990         TRACE("(%p)->(SID_VariantConversion)\n", This);
 991         return IActiveScript_QueryInterface(This->ctx->active_script, riid, ppv);
 992     }
 993
 994     FIXME("(%p)->(%s %s %p)\n", This, debugstr_guid(guidService), debugstr_guid(riid), ppv);
 995
 996     *ppv = NULL;
 997     return E_NOINTERFACE;
 998 }
 999
1000 static const IServiceProviderVtbl ServiceProviderVtbl = {
1001     JSCaller_QueryInterface,
1002     JSCaller_AddRef,
1003     JSCaller_Release,
1004     JSCaller_QueryService
1005 };
1006
1007 HRESULT create_jscaller(script_ctx_t *ctx)
1008 {
1009     JSCaller *ret;
1010
1011     ret = heap_alloc(sizeof(*ret));
1012     if(!ret)
1013         return E_OUTOFMEMORY;
1014
1015     ret->IServiceProvider_iface.lpVtbl = &ServiceProviderVtbl;
1016     ret->ref = 1;
1017     ret->ctx = ctx;
1018
1019     ctx->jscaller = ret;
1020     return S_OK;
1021 }