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_head(&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         *val = jsval_undefined();
 217         return E_OUTOFMEMORY;
 218     }
 219
 220     V_VT(v) = VT_EMPTY;
 221     hres = VariantCopy(v, var);
 222     if(FAILED(hres)) {
 223         *val = jsval_undefined();
 224         heap_free(v);
 225     }
 226     return hres;
 227 }
 228
 229 HRESULT jsval_copy(jsval_t v, jsval_t *r)
 230 {
 231     switch(jsval_type(v)) {
 232     case JSV_UNDEFINED:
 233     case JSV_NULL:
 234     case JSV_NUMBER:
 235     case JSV_BOOL:
 236         *r = v;
 237         return S_OK;
 238     case JSV_OBJECT:
 239         if(get_object(v))
 240             IDispatch_AddRef(get_object(v));
 241         *r = v;
 242         return S_OK;
 243     case JSV_STRING: {
 244         jsstr_addref(get_string(v));
 245         *r = v;
 246         return S_OK;
 247     }
 248     case JSV_VARIANT:
 249         return jsval_variant(r, get_variant(v));
 250     }
 251
 252     assert(0);
 253     return E_FAIL;
 254 }
 255
 256 HRESULT variant_to_jsval(VARIANT *var, jsval_t *r)
 257 {
 258     if(V_VT(var) == (VT_VARIANT|VT_BYREF))
 259         var = V_VARIANTREF(var);
 260
 261     switch(V_VT(var)) {
 262     case VT_EMPTY:
 263         *r = jsval_undefined();
 264         return S_OK;
 265     case VT_NULL:
 266         *r = jsval_null();
 267         return S_OK;
 268     case VT_BOOL:
 269         *r = jsval_bool(V_BOOL(var));
 270         return S_OK;
 271     case VT_I4:
 272         *r = jsval_number(V_I4(var));
 273         return S_OK;
 274     case VT_R8:
 275         *r = jsval_number(V_R8(var));
 276         return S_OK;
 277     case VT_BSTR: {
 278         jsstr_t *str;
 279
 280         if(V_BSTR(var)) {
 281             str = jsstr_alloc_len(V_BSTR(var), SysStringLen(V_BSTR(var)));
 282             if(!str)
 283                 return E_OUTOFMEMORY;
 284         }else {
 285             str = jsstr_null_bstr();
 286         }
 287
 288         *r = jsval_string(str);
 289         return S_OK;
 290     }
 291     case VT_DISPATCH: {
 292         if(V_DISPATCH(var))
 293             IDispatch_AddRef(V_DISPATCH(var));
 294         *r = jsval_disp(V_DISPATCH(var));
 295         return S_OK;
 296     }
 297     case VT_I2:
 298         *r = jsval_number(V_I2(var));
 299         return S_OK;
 300     case VT_UI2:
 301         *r = jsval_number(V_UI2(var));
 302         return S_OK;
 303     case VT_INT:
 304         *r = jsval_number(V_INT(var));
 305         return S_OK;
 306     case VT_UI4:
 307         *r = jsval_number(V_UI4(var));
 308         return S_OK;
 309     case VT_UI8:
 310         /*
 311          * Native doesn't support VT_UI8 here, but it's needed for IE9+ APIs
 312          * (native IE9 doesn't use jscript.dll for JavaScript).
 313          */
 314         *r = jsval_number(V_UI8(var));
 315         return S_OK;
 316     case VT_R4:
 317         *r = jsval_number(V_R4(var));
 318         return S_OK;
 319     case VT_UNKNOWN:
 320         if(V_UNKNOWN(var)) {
 321             IDispatch *disp;
 322             HRESULT hres;
 323
 324             hres = IUnknown_QueryInterface(V_UNKNOWN(var), &IID_IDispatch, (void**)&disp);
 325             if(SUCCEEDED(hres)) {
 326                 *r = jsval_disp(disp);
 327                 return S_OK;
 328             }
 329         }else {
 330             *r = jsval_disp(NULL);
 331             return S_OK;
 332         }
 333         /* fall through */
 334     default:
 335         return jsval_variant(r, var);
 336     }
 337 }
 338
 339 HRESULT jsval_to_variant(jsval_t val, VARIANT *retv)
 340 {
 341     switch(jsval_type(val)) {
 342     case JSV_UNDEFINED:
 343         V_VT(retv) = VT_EMPTY;
 344         return S_OK;
 345     case JSV_NULL:
 346         V_VT(retv) = VT_NULL;
 347         return S_OK;
 348     case JSV_OBJECT:
 349         V_VT(retv) = VT_DISPATCH;
 350         if(get_object(val))
 351             IDispatch_AddRef(get_object(val));
 352         V_DISPATCH(retv) = get_object(val);
 353         return S_OK;
 354     case JSV_STRING: {
 355         jsstr_t *str = get_string(val);
 356
 357         V_VT(retv) = VT_BSTR;
 358         if(is_null_bstr(str)) {
 359             V_BSTR(retv) = NULL;
 360         }else {
 361             V_BSTR(retv) = SysAllocStringLen(NULL, jsstr_length(str));
 362             if(V_BSTR(retv))
 363                 jsstr_flush(str, V_BSTR(retv));
 364             else
 365                 return E_OUTOFMEMORY;
 366         }
 367         return S_OK;
 368     }
 369     case JSV_NUMBER: {
 370         double n = get_number(val);
 371
 372         if(is_int32(n)) {
 373             V_VT(retv) = VT_I4;
 374             V_I4(retv) = n;
 375         }else {
 376             V_VT(retv) = VT_R8;
 377             V_R8(retv) = n;
 378         }
 379
 380         return S_OK;
 381     }
 382     case JSV_BOOL:
 383         V_VT(retv) = VT_BOOL;
 384         V_BOOL(retv) = get_bool(val) ? VARIANT_TRUE : VARIANT_FALSE;
 385         return S_OK;
 386     case JSV_VARIANT:
 387         V_VT(retv) = VT_EMPTY;
 388         return VariantCopy(retv, get_variant(val));
 389     }
 390
 391     assert(0);
 392     return E_FAIL;
 393 }
 394
 395 /* ECMA-262 3rd Edition    9.1 */
 396 HRESULT to_primitive(script_ctx_t *ctx, jsval_t val, jsval_t *ret, hint_t hint)
 397 {
 398     if(is_object_instance(val)) {
 399         jsdisp_t *jsdisp;
 400         jsval_t prim;
 401         DISPID id;
 402         HRESULT hres;
 403
 404         static const WCHAR toStringW[] = {'t','o','S','t','r','i','n','g',0};
 405         static const WCHAR valueOfW[] = {'v','a','l','u','e','O','f',0};
 406
 407         if(!get_object(val)) {
 408             *ret = jsval_null();
 409             return S_OK;
 410         }
 411
 412         jsdisp = iface_to_jsdisp(get_object(val));
 413         if(!jsdisp)
 414             return disp_propget(ctx, get_object(val), DISPID_VALUE, ret);
 415
 416         if(hint == NO_HINT)
 417             hint = is_class(jsdisp, JSCLASS_DATE) ? HINT_STRING : HINT_NUMBER;
 418
 419         /* Native implementation doesn't throw TypeErrors, returns strange values */
 420
 421         hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? toStringW : valueOfW, 0, &id);
 422         if(SUCCEEDED(hres)) {
 423             hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, 0, NULL, &prim);
 424             if(FAILED(hres)) {
 425                 WARN("call error - forwarding exception\n");
 426                 jsdisp_release(jsdisp);
 427                 return hres;
 428             }else if(!is_object_instance(prim)) {
 429                 jsdisp_release(jsdisp);
 430                 *ret = prim;
 431                 return S_OK;
 432             }else {
 433                 IDispatch_Release(get_object(prim));
 434             }
 435         }
 436
 437         hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? valueOfW : toStringW, 0, &id);
 438         if(SUCCEEDED(hres)) {
 439             hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, 0, NULL, &prim);
 440             if(FAILED(hres)) {
 441                 WARN("call error - forwarding exception\n");
 442                 jsdisp_release(jsdisp);
 443                 return hres;
 444             }else if(!is_object_instance(prim)) {
 445                 jsdisp_release(jsdisp);
 446                 *ret = prim;
 447                 return S_OK;
 448             }else {
 449                 IDispatch_Release(get_object(prim));
 450             }
 451         }
 452
 453         jsdisp_release(jsdisp);
 454
 455         WARN("failed\n");
 456         return throw_type_error(ctx, JS_E_TO_PRIMITIVE, NULL);
 457     }
 458
 459     return jsval_copy(val, ret);
 460
 461 }
 462
 463 /* ECMA-262 3rd Edition    9.2 */
 464 HRESULT to_boolean(jsval_t val, BOOL *ret)
 465 {
 466     switch(jsval_type(val)) {
 467     case JSV_UNDEFINED:
 468     case JSV_NULL:
 469         *ret = FALSE;
 470         return S_OK;
 471     case JSV_OBJECT:
 472         *ret = get_object(val) != NULL;
 473         return S_OK;
 474     case JSV_STRING:
 475         *ret = jsstr_length(get_string(val)) != 0;
 476         return S_OK;
 477     case JSV_NUMBER:
 478         *ret = !isnan(get_number(val)) && get_number(val);
 479         return S_OK;
 480     case JSV_BOOL:
 481         *ret = get_bool(val);
 482         return S_OK;
 483     case JSV_VARIANT:
 484         FIXME("unimplemented for variant %s\n", debugstr_variant(get_variant(val)));
 485         return E_NOTIMPL;
 486     }
 487
 488     assert(0);
 489     return E_FAIL;
 490 }
 491
 492 static int hex_to_int(WCHAR c)
 493 {
 494     if('0' <= c && c <= '9')
 495         return c-'0';
 496
 497     if('a' <= c && c <= 'f')
 498         return c-'a'+10;
 499
 500     if('A' <= c && c <= 'F')
 501         return c-'A'+10;
 502
 503     return -1;
 504 }
 505
 506 /* ECMA-262 3rd Edition    9.3.1 */
 507 static HRESULT str_to_number(jsstr_t *str, double *ret)
 508 {
 509     const WCHAR *ptr;
 510     BOOL neg = FALSE;
 511     DOUBLE d = 0.0;
 512
 513     static const WCHAR infinityW[] = {'I','n','f','i','n','i','t','y'};
 514
 515     ptr = jsstr_flatten(str);
 516     if(!ptr)
 517         return E_OUTOFMEMORY;
 518
 519     while(isspaceW(*ptr))
 520         ptr++;
 521
 522     if(*ptr == '-') {
 523         neg = TRUE;
 524         ptr++;
 525     }else if(*ptr == '+') {
 526         ptr++;
 527     }
 528
 529     if(!strncmpW(ptr, infinityW, sizeof(infinityW)/sizeof(WCHAR))) {
 530         ptr += sizeof(infinityW)/sizeof(WCHAR);
 531         while(*ptr && isspaceW(*ptr))
 532             ptr++;
 533
 534         if(*ptr)
 535             *ret = NAN;
 536         else
 537             *ret = neg ? -INFINITY : INFINITY;
 538         return S_OK;
 539     }
 540
 541     if(*ptr == '0' && ptr[1] == 'x') {
 542         DWORD l = 0;
 543
 544         ptr += 2;
 545         while((l = hex_to_int(*ptr)) != -1) {
 546             d = d*16 + l;
 547             ptr++;
 548         }
 549
 550         *ret = d;
 551         return S_OK;
 552     }
 553
 554     while(isdigitW(*ptr))
 555         d = d*10 + (*ptr++ - '0');
 556
 557     if(*ptr == 'e' || *ptr == 'E') {
 558         BOOL eneg = FALSE;
 559         LONG l = 0;
 560
 561         ptr++;
 562         if(*ptr == '-') {
 563             ptr++;
 564             eneg = TRUE;
 565         }else if(*ptr == '+') {
 566             ptr++;
 567         }
 568
 569         while(isdigitW(*ptr))
 570             l = l*10 + (*ptr++ - '0');
 571         if(eneg)
 572             l = -l;
 573
 574         d *= pow(10, l);
 575     }else if(*ptr == '.') {
 576         DOUBLE dec = 0.1;
 577
 578         ptr++;
 579         while(isdigitW(*ptr)) {
 580             d += dec * (*ptr++ - '0');
 581             dec *= 0.1;
 582         }
 583     }
 584
 585     while(isspaceW(*ptr))
 586         ptr++;
 587
 588     if(*ptr) {
 589         *ret = NAN;
 590         return S_OK;
 591     }
 592
 593     if(neg)
 594         d = -d;
 595
 596     *ret = d;
 597     return S_OK;
 598 }
 599
 600 /* ECMA-262 3rd Edition    9.3 */
 601 HRESULT to_number(script_ctx_t *ctx, jsval_t val, double *ret)
 602 {
 603     switch(jsval_type(val)) {
 604     case JSV_UNDEFINED:
 605         *ret = NAN;
 606         return S_OK;
 607     case JSV_NULL:
 608         *ret = 0;
 609         return S_OK;
 610     case JSV_NUMBER:
 611         *ret = get_number(val);
 612         return S_OK;
 613     case JSV_STRING:
 614         return str_to_number(get_string(val), ret);
 615     case JSV_OBJECT: {
 616         jsval_t prim;
 617         HRESULT hres;
 618
 619         hres = to_primitive(ctx, val, &prim, HINT_NUMBER);
 620         if(FAILED(hres))
 621             return hres;
 622
 623         hres = to_number(ctx, prim, ret);
 624         jsval_release(prim);
 625         return hres;
 626     }
 627     case JSV_BOOL:
 628         *ret = get_bool(val) ? 1 : 0;
 629         return S_OK;
 630     case JSV_VARIANT:
 631         FIXME("unimplemented for variant %s\n", debugstr_variant(get_variant(val)));
 632         return E_NOTIMPL;
 633     };
 634
 635     assert(0);
 636     return E_FAIL;
 637 }
 638
 639 /* ECMA-262 3rd Edition    9.4 */
 640 HRESULT to_integer(script_ctx_t *ctx, jsval_t v, double *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     if(isnan(n))
 650         *ret = 0;
 651     else
 652         *ret = n >= 0.0 ? floor(n) : -floor(-n);
 653     return S_OK;
 654 }
 655
 656 /* ECMA-262 3rd Edition    9.5 */
 657 HRESULT to_int32(script_ctx_t *ctx, jsval_t v, INT *ret)
 658 {
 659     double n;
 660     HRESULT hres;
 661
 662     hres = to_number(ctx, v, &n);
 663     if(FAILED(hres))
 664         return hres;
 665
 666     *ret = is_finite(n) ? n : 0;
 667     return S_OK;
 668 }
 669
 670 /* ECMA-262 3rd Edition    9.6 */
 671 HRESULT to_uint32(script_ctx_t *ctx, jsval_t val, DWORD *ret)
 672 {
 673     INT32 n;
 674     HRESULT hres;
 675
 676     hres = to_int32(ctx, val, &n);
 677     if(SUCCEEDED(hres))
 678         *ret = n;
 679     return hres;
 680 }
 681
 682 static jsstr_t *int_to_string(int i)
 683 {
 684     WCHAR buf[12], *p;
 685     BOOL neg = FALSE;
 686
 687     if(!i) {
 688         static const WCHAR zeroW[] = {'0',0};
 689         return jsstr_alloc(zeroW);
 690     }
 691
 692     if(i < 0) {
 693         neg = TRUE;
 694         i = -i;
 695     }
 696
 697     p = buf + sizeof(buf)/sizeof(*buf)-1;
 698     *p-- = 0;
 699     while(i) {
 700         *p-- = i%10 + '0';
 701         i /= 10;
 702     }
 703
 704     if(neg)
 705         *p = '-';
 706     else
 707         p++;
 708
 709     return jsstr_alloc(p);
 710 }
 711
 712 HRESULT double_to_string(double n, jsstr_t **str)
 713 {
 714     const WCHAR InfinityW[] = {'-','I','n','f','i','n','i','t','y',0};
 715
 716     if(isnan(n)) {
 717         *str = jsstr_nan();
 718     }else if(isinf(n)) {
 719         *str = jsstr_alloc(n<0 ? InfinityW : InfinityW+1);
 720     }else if(is_int32(n)) {
 721         *str = int_to_string(n);
 722     }else {
 723         VARIANT strv, v;
 724         HRESULT hres;
 725
 726         /* FIXME: Don't use VariantChangeTypeEx */
 727         V_VT(&v) = VT_R8;
 728         V_R8(&v) = n;
 729         V_VT(&strv) = VT_EMPTY;
 730         hres = VariantChangeTypeEx(&strv, &v, MAKELCID(MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US),SORT_DEFAULT), 0, VT_BSTR);
 731         if(FAILED(hres))
 732             return hres;
 733
 734         *str = jsstr_alloc(V_BSTR(&strv));
 735         SysFreeString(V_BSTR(&strv));
 736     }
 737
 738     return *str ? S_OK : E_OUTOFMEMORY;
 739 }
 740
 741 /* ECMA-262 3rd Edition    9.8 */
 742 HRESULT to_string(script_ctx_t *ctx, jsval_t val, jsstr_t **str)
 743 {
 744     const WCHAR nullW[] = {'n','u','l','l',0};
 745     const WCHAR trueW[] = {'t','r','u','e',0};
 746     const WCHAR falseW[] = {'f','a','l','s','e',0};
 747
 748     switch(jsval_type(val)) {
 749     case JSV_UNDEFINED:
 750         *str = jsstr_undefined();
 751         return S_OK;
 752     case JSV_NULL:
 753         *str = jsstr_alloc(nullW);
 754         break;
 755     case JSV_NUMBER:
 756         return double_to_string(get_number(val), str);
 757     case JSV_STRING:
 758         *str = jsstr_addref(get_string(val));
 759         break;
 760     case JSV_OBJECT: {
 761         jsval_t prim;
 762         HRESULT hres;
 763
 764         hres = to_primitive(ctx, val, &prim, HINT_STRING);
 765         if(FAILED(hres))
 766             return hres;
 767
 768         hres = to_string(ctx, prim, str);
 769         jsval_release(prim);
 770         return hres;
 771     }
 772     case JSV_BOOL:
 773         *str = jsstr_alloc(get_bool(val) ? trueW : falseW);
 774         break;
 775     default:
 776         FIXME("unsupported %s\n", debugstr_jsval(val));
 777         return E_NOTIMPL;
 778     }
 779
 780     return *str ? S_OK : E_OUTOFMEMORY;
 781 }
 782
 783 HRESULT to_flat_string(script_ctx_t *ctx, jsval_t val, jsstr_t **str, const WCHAR **ret_str)
 784 {
 785     HRESULT hres;
 786
 787     hres = to_string(ctx, val, str);
 788     if(FAILED(hres))
 789         return hres;
 790
 791     *ret_str = jsstr_flatten(*str);
 792     if(!*ret_str) {
 793         jsstr_release(*str);
 794         return E_OUTOFMEMORY;
 795     }
 796
 797     return S_OK;
 798 }
 799
 800 /* ECMA-262 3rd Edition    9.9 */
 801 HRESULT to_object(script_ctx_t *ctx, jsval_t val, IDispatch **disp)
 802 {
 803     jsdisp_t *dispex;
 804     HRESULT hres;
 805
 806     switch(jsval_type(val)) {
 807     case JSV_STRING:
 808         hres = create_string(ctx, get_string(val), &dispex);
 809         if(FAILED(hres))
 810             return hres;
 811
 812         *disp = to_disp(dispex);
 813         break;
 814     case JSV_NUMBER:
 815         hres = create_number(ctx, get_number(val), &dispex);
 816         if(FAILED(hres))
 817             return hres;
 818
 819         *disp = to_disp(dispex);
 820         break;
 821     case JSV_OBJECT:
 822         if(get_object(val)) {
 823             *disp = get_object(val);
 824             IDispatch_AddRef(*disp);
 825         }else {
 826             jsdisp_t *obj;
 827
 828             hres = create_object(ctx, NULL, &obj);
 829             if(FAILED(hres))
 830                 return hres;
 831
 832             *disp = to_disp(obj);
 833         }
 834         break;
 835     case JSV_BOOL:
 836         hres = create_bool(ctx, get_bool(val), &dispex);
 837         if(FAILED(hres))
 838             return hres;
 839
 840         *disp = to_disp(dispex);
 841         break;
 842     case JSV_UNDEFINED:
 843     case JSV_NULL:
 844         WARN("object expected\n");
 845         return throw_type_error(ctx, JS_E_OBJECT_EXPECTED, NULL);
 846     case JSV_VARIANT:
 847         switch(V_VT(get_variant(val))) {
 848         case VT_ARRAY|VT_VARIANT:
 849             hres = create_vbarray(ctx, V_ARRAY(get_variant(val)), &dispex);
 850             if(FAILED(hres))
 851                 return hres;
 852
 853             *disp = to_disp(dispex);
 854             break;
 855
 856         default:
 857             FIXME("Unsupported %s\n", debugstr_variant(get_variant(val)));
 858             return E_NOTIMPL;
 859         }
 860         break;
 861     }
 862
 863     return S_OK;
 864 }
 865
 866 HRESULT variant_change_type(script_ctx_t *ctx, VARIANT *dst, VARIANT *src, VARTYPE vt)
 867 {
 868     jsval_t val;
 869     HRESULT hres;
 870
 871     clear_ei(ctx);
 872     hres = variant_to_jsval(src, &val);
 873     if(FAILED(hres))
 874         return hres;
 875
 876     switch(vt) {
 877     case VT_I2:
 878     case VT_I4: {
 879         INT i;
 880
 881         hres = to_int32(ctx, val, &i);
 882         if(SUCCEEDED(hres)) {
 883             if(vt == VT_I4)
 884                 V_I4(dst) = i;
 885             else
 886                 V_I2(dst) = i;
 887         }
 888         break;
 889     }
 890     case VT_R8: {
 891         double n;
 892         hres = to_number(ctx, val, &n);
 893         if(SUCCEEDED(hres))
 894             V_R8(dst) = n;
 895         break;
 896     }
 897     case VT_R4: {
 898         double n;
 899
 900         hres = to_number(ctx, val, &n);
 901         if(SUCCEEDED(hres))
 902             V_R4(dst) = n;
 903         break;
 904     }
 905     case VT_BOOL: {
 906         BOOL b;
 907
 908         hres = to_boolean(val, &b);
 909         if(SUCCEEDED(hres))
 910             V_BOOL(dst) = b ? VARIANT_TRUE : VARIANT_FALSE;
 911         break;
 912     }
 913     case VT_BSTR: {
 914         jsstr_t *str;
 915
 916         hres = to_string(ctx, val, &str);
 917         if(FAILED(hres))
 918             break;
 919
 920         if(is_null_bstr(str)) {
 921             V_BSTR(dst) = NULL;
 922             break;
 923         }
 924
 925         V_BSTR(dst) = SysAllocStringLen(NULL, jsstr_length(str));
 926         if(V_BSTR(dst))
 927             jsstr_flush(str, V_BSTR(dst));
 928         else
 929             hres = E_OUTOFMEMORY;
 930         break;
 931     }
 932     case VT_EMPTY:
 933         hres = V_VT(src) == VT_EMPTY ? S_OK : E_NOTIMPL;
 934         break;
 935     case VT_NULL:
 936         hres = V_VT(src) == VT_NULL ? S_OK : E_NOTIMPL;
 937         break;
 938     default:
 939         FIXME("vt %d not implemented\n", vt);
 940         hres = E_NOTIMPL;
 941     }
 942
 943     jsval_release(val);
 944     if(FAILED(hres))
 945         return hres;
 946
 947     V_VT(dst) = vt;
 948     return S_OK;
 949 }
 950
 951 static inline JSCaller *impl_from_IServiceProvider(IServiceProvider *iface)
 952 {
 953     return CONTAINING_RECORD(iface, JSCaller, IServiceProvider_iface);
 954 }
 955
 956 static HRESULT WINAPI JSCaller_QueryInterface(IServiceProvider *iface, REFIID riid, void **ppv)
 957 {
 958     JSCaller *This = impl_from_IServiceProvider(iface);
 959
 960     if(IsEqualGUID(&IID_IUnknown, riid)) {
 961         TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv);
 962         *ppv = &This->IServiceProvider_iface;
 963     }else if(IsEqualGUID(&IID_IServiceProvider, riid)) {
 964         TRACE("(%p)->(IID_IServiceProvider %p)\n", This, ppv);
 965         *ppv = &This->IServiceProvider_iface;
 966     }else {
 967         WARN("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppv);
 968         *ppv = NULL;
 969         return E_NOINTERFACE;
 970     }
 971
 972     IUnknown_AddRef((IUnknown*)*ppv);
 973     return S_OK;
 974 }
 975
 976 static ULONG WINAPI JSCaller_AddRef(IServiceProvider *iface)
 977 {
 978     JSCaller *This = impl_from_IServiceProvider(iface);
 979     LONG ref = InterlockedIncrement(&This->ref);
 980
 981     TRACE("(%p) ref=%d\n", This, ref);
 982
 983     return ref;
 984 }
 985
 986 static ULONG WINAPI JSCaller_Release(IServiceProvider *iface)
 987 {
 988     JSCaller *This = impl_from_IServiceProvider(iface);
 989     LONG ref = InterlockedIncrement(&This->ref);
 990
 991     TRACE("(%p) ref=%d\n", This, ref);
 992
 993     if(!ref) {
 994         assert(!This->ctx);
 995         heap_free(This);
 996     }
 997
 998     return ref;
 999 }
1000
1001 static HRESULT WINAPI JSCaller_QueryService(IServiceProvider *iface, REFGUID guidService,
1002         REFIID riid, void **ppv)
1003 {
1004     JSCaller *This = impl_from_IServiceProvider(iface);
1005
1006     if(IsEqualGUID(guidService, &SID_VariantConversion) && This->ctx && This->ctx->active_script) {
1007         TRACE("(%p)->(SID_VariantConversion)\n", This);
1008         return IActiveScript_QueryInterface(This->ctx->active_script, riid, ppv);
1009     }
1010
1011     FIXME("(%p)->(%s %s %p)\n", This, debugstr_guid(guidService), debugstr_guid(riid), ppv);
1012
1013     *ppv = NULL;
1014     return E_NOINTERFACE;
1015 }
1016
1017 static const IServiceProviderVtbl ServiceProviderVtbl = {
1018     JSCaller_QueryInterface,
1019     JSCaller_AddRef,
1020     JSCaller_Release,
1021     JSCaller_QueryService
1022 };
1023
1024 HRESULT create_jscaller(script_ctx_t *ctx)
1025 {
1026     JSCaller *ret;
1027
1028     ret = heap_alloc(sizeof(*ret));
1029     if(!ret)
1030         return E_OUTOFMEMORY;
1031
1032     ret->IServiceProvider_iface.lpVtbl = &ServiceProviderVtbl;
1033     ret->ref = 1;
1034     ret->ctx = ctx;
1035
1036     ctx->jscaller = ret;
1037     return S_OK;
1038 }