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