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