dll/win32/jscript/jsutils.c

   1 /*
   2  * Copyright 2008 Jacek Caban for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "jscript.h"
  20
  21 WINE_DECLARE_DEBUG_CHANNEL(heap);
  22
  23 const char *debugstr_variant(const VARIANT *v)
  24 {
  25     if(!v)
  26         return "(null)";
  27
  28     switch(V_VT(v)) {
  29     case VT_EMPTY:
  30         return "{VT_EMPTY}";
  31     case VT_NULL:
  32         return "{VT_NULL}";
  33     case VT_I4:
  34         return wine_dbg_sprintf("{VT_I4: %d}", V_I4(v));
  35     case VT_UI4:
  36         return wine_dbg_sprintf("{VT_UI4: %u}", V_UI4(v));
  37     case VT_R8:
  38         return wine_dbg_sprintf("{VT_R8: %lf}", V_R8(v));
  39     case VT_BSTR:
  40         return wine_dbg_sprintf("{VT_BSTR: %s}", debugstr_w(V_BSTR(v)));
  41     case VT_DISPATCH:
  42         return wine_dbg_sprintf("{VT_DISPATCH: %p}", V_DISPATCH(v));
  43     case VT_BOOL:
  44         return wine_dbg_sprintf("{VT_BOOL: %x}", V_BOOL(v));
  45     case VT_ARRAY|VT_VARIANT:
  46         return "{VT_ARRAY|VT_VARIANT: ...}";
  47     default:
  48         return wine_dbg_sprintf("{vt %d}", V_VT(v));
  49     }
  50 }
  51
  52 const char *debugstr_jsval(const jsval_t v)
  53 {
  54     switch(jsval_type(v)) {
  55     case JSV_UNDEFINED:
  56         return "undefined";
  57     case JSV_NULL:
  58         return "null";
  59     case JSV_OBJECT:
  60         return wine_dbg_sprintf("obj(%p)", get_object(v));
  61     case JSV_STRING:
  62         return wine_dbg_sprintf("str(%s)", debugstr_jsstr(get_string(v)));
  63     case JSV_NUMBER:
  64         return wine_dbg_sprintf("%lf", get_number(v));
  65     case JSV_BOOL:
  66         return get_bool(v) ? "true" : "false";
  67     case JSV_VARIANT:
  68         return debugstr_variant(get_variant(v));
  69     }
  70
  71     assert(0);
  72     return NULL;
  73 }
  74
  75 #define MIN_BLOCK_SIZE  128
  76 #define ARENA_FREE_FILLER  0xaa
  77
  78 static inline DWORD block_size(DWORD block)
  79 {
  80     return MIN_BLOCK_SIZE << block;
  81 }
  82
  83 void heap_pool_init(heap_pool_t *heap)
  84 {
  85     memset(heap, 0, sizeof(*heap));
  86     list_init(&heap->custom_blocks);
  87 }
  88
  89 void *heap_pool_alloc(heap_pool_t *heap, DWORD size)
  90 {
  91     struct list *list;
  92     void *tmp;
  93
  94     if(!heap->block_cnt) {
  95         if(!heap->blocks) {
  96             heap->blocks = heap_alloc(sizeof(void*));
  97             if(!heap->blocks)
  98                 return NULL;
  99         }
 100
 101         tmp = heap_alloc(block_size(0));
 102         if(!tmp)
 103             return NULL;
 104
 105         heap->blocks[0] = tmp;
 106         heap->block_cnt = 1;
 107     }
 108
 109     if(heap->offset + size <= block_size(heap->last_block)) {
 110         tmp = ((BYTE*)heap->blocks[heap->last_block])+heap->offset;
 111         heap->offset += size;
 112         return tmp;
 113     }
 114
 115     if(size <= block_size(heap->last_block+1)) {
 116         if(heap->last_block+1 == heap->block_cnt) {
 117             tmp = heap_realloc(heap->blocks, (heap->block_cnt+1)*sizeof(void*));
 118             if(!tmp)
 119                 return NULL;
 120
 121             heap->blocks = tmp;
 122             heap->blocks[heap->block_cnt] = heap_alloc(block_size(heap->block_cnt));
 123             if(!heap->blocks[heap->block_cnt])
 124                 return NULL;
 125
 126             heap->block_cnt++;
 127         }
 128
 129         heap->last_block++;
 130         heap->offset = size;
 131         return heap->blocks[heap->last_block];
 132     }
 133
 134     list = heap_alloc(size + sizeof(struct list));
 135     if(!list)
 136         return NULL;
 137
 138     list_add_head(&heap->custom_blocks, list);
 139     return list+1;
 140 }
 141
 142 void *heap_pool_grow(heap_pool_t *heap, void *mem, DWORD size, DWORD inc)
 143 {
 144     void *ret;
 145
 146     if(mem == (BYTE*)heap->blocks[heap->last_block] + heap->offset-size
 147        && heap->offset+inc < block_size(heap->last_block)) {
 148         heap->offset += inc;
 149         return mem;
 150     }
 151
 152     ret = heap_pool_alloc(heap, size+inc);
 153     if(ret) /* FIXME: avoid copying for custom blocks */
 154         memcpy(ret, mem, size);
 155     return ret;
 156 }
 157
 158 void heap_pool_clear(heap_pool_t *heap)
 159 {
 160     struct list *tmp;
 161
 162     if(!heap)
 163         return;
 164
 165     while((tmp = list_next(&heap->custom_blocks, &heap->custom_blocks))) {
 166         list_remove(tmp);
 167         heap_free(tmp);
 168     }
 169
 170     if(WARN_ON(heap)) {
 171         DWORD i;
 172
 173         for(i=0; i < heap->block_cnt; i++)
 174             memset(heap->blocks[i], ARENA_FREE_FILLER, block_size(i));
 175     }
 176
 177     heap->last_block = heap->offset = 0;
 178     heap->mark = FALSE;
 179 }
 180
 181 void heap_pool_free(heap_pool_t *heap)
 182 {
 183     DWORD i;
 184
 185     heap_pool_clear(heap);
 186
 187     for(i=0; i < heap->block_cnt; i++)
 188         heap_free(heap->blocks[i]);
 189     heap_free(heap->blocks);
 190
 191     heap_pool_init(heap);
 192 }
 193
 194 heap_pool_t *heap_pool_mark(heap_pool_t *heap)
 195 {
 196     if(heap->mark)
 197         return NULL;
 198
 199     heap->mark = TRUE;
 200     return heap;
 201 }
 202
 203 void jsval_release(jsval_t val)
 204 {
 205     switch(jsval_type(val)) {
 206     case JSV_OBJECT:
 207         if(get_object(val))
 208             IDispatch_Release(get_object(val));
 209         break;
 210     case JSV_STRING:
 211         jsstr_release(get_string(val));
 212         break;
 213     case JSV_VARIANT:
 214         VariantClear(get_variant(val));
 215         heap_free(get_variant(val));
 216         break;
 217     default:
 218         break;
 219     }
 220 }
 221
 222 static HRESULT jsval_variant(jsval_t *val, VARIANT *var)
 223 {
 224     VARIANT *v;
 225     HRESULT hres;
 226
 227     __JSVAL_TYPE(*val) = JSV_VARIANT;
 228     __JSVAL_VAR(*val) = v = heap_alloc(sizeof(VARIANT));
 229     if(!v)
 230         return E_OUTOFMEMORY;
 231
 232     V_VT(v) = VT_EMPTY;
 233     hres = VariantCopy(v, var);
 234     if(FAILED(hres))
 235         heap_free(v);
 236     return hres;
 237 }
 238
 239 HRESULT jsval_copy(jsval_t v, jsval_t *r)
 240 {
 241     switch(jsval_type(v)) {
 242     case JSV_UNDEFINED:
 243     case JSV_NULL:
 244     case JSV_NUMBER:
 245     case JSV_BOOL:
 246         *r = v;
 247         return S_OK;
 248     case JSV_OBJECT:
 249         if(get_object(v))
 250             IDispatch_AddRef(get_object(v));
 251         *r = v;
 252         return S_OK;
 253     case JSV_STRING: {
 254         jsstr_addref(get_string(v));
 255         *r = v;
 256         return S_OK;
 257     }
 258     case JSV_VARIANT:
 259         return jsval_variant(r, get_variant(v));
 260     }
 261
 262     assert(0);
 263     return E_FAIL;
 264 }
 265
 266 HRESULT variant_to_jsval(VARIANT *var, jsval_t *r)
 267 {
 268     switch(V_VT(var)) {
 269     case VT_EMPTY:
 270         *r = jsval_undefined();
 271         return S_OK;
 272     case VT_NULL:
 273         *r = jsval_null();
 274         return S_OK;
 275     case VT_BOOL:
 276         *r = jsval_bool(V_BOOL(var));
 277         return S_OK;
 278     case VT_I4:
 279         *r = jsval_number(V_I4(var));
 280         return S_OK;
 281     case VT_R8:
 282         *r = jsval_number(V_R8(var));
 283         return S_OK;
 284     case VT_BSTR: {
 285         jsstr_t *str;
 286
 287         if(V_BSTR(var)) {
 288             str = jsstr_alloc_len(V_BSTR(var), SysStringLen(V_BSTR(var)));
 289             if(!str)
 290                 return E_OUTOFMEMORY;
 291         }else {
 292             str = jsstr_null_bstr();
 293         }
 294
 295         *r = jsval_string(str);
 296         return S_OK;
 297     }
 298     case VT_DISPATCH: {
 299         if(V_DISPATCH(var))
 300             IDispatch_AddRef(V_DISPATCH(var));
 301         *r = jsval_disp(V_DISPATCH(var));
 302         return S_OK;
 303     }
 304     case VT_I2:
 305         *r = jsval_number(V_I2(var));
 306         return S_OK;
 307     case VT_INT:
 308         *r = jsval_number(V_INT(var));
 309         return S_OK;
 310     case VT_UNKNOWN:
 311         if(V_UNKNOWN(var)) {
 312             IDispatch *disp;
 313             HRESULT hres;
 314
 315             hres = IUnknown_QueryInterface(V_UNKNOWN(var), &IID_IDispatch, (void**)&disp);
 316             if(SUCCEEDED(hres)) {
 317                 *r = jsval_disp(disp);
 318                 return S_OK;
 319             }
 320         }else {
 321             *r = jsval_disp(NULL);
 322             return S_OK;
 323         }
 324         /* fall through */
 325     default:
 326         return jsval_variant(r, var);
 327     }
 328 }
 329
 330 HRESULT jsval_to_variant(jsval_t val, VARIANT *retv)
 331 {
 332     switch(jsval_type(val)) {
 333     case JSV_UNDEFINED:
 334         V_VT(retv) = VT_EMPTY;
 335         return S_OK;
 336     case JSV_NULL:
 337         V_VT(retv) = VT_NULL;
 338         return S_OK;
 339     case JSV_OBJECT:
 340         V_VT(retv) = VT_DISPATCH;
 341         if(get_object(val))
 342             IDispatch_AddRef(get_object(val));
 343         V_DISPATCH(retv) = get_object(val);
 344         return S_OK;
 345     case JSV_STRING: {
 346         jsstr_t *str = get_string(val);
 347
 348         V_VT(retv) = VT_BSTR;
 349         if(is_null_bstr(str)) {
 350             V_BSTR(retv) = NULL;
 351         }else {
 352             V_BSTR(retv) = SysAllocStringLen(NULL, jsstr_length(str));
 353             if(V_BSTR(retv))
 354                 jsstr_flush(str, V_BSTR(retv));
 355             else
 356                 return E_OUTOFMEMORY;
 357         }
 358         return S_OK;
 359     }
 360     case JSV_NUMBER: {
 361         double n = get_number(val);
 362
 363         if(is_int32(n)) {
 364             V_VT(retv) = VT_I4;
 365             V_I4(retv) = n;
 366         }else {
 367             V_VT(retv) = VT_R8;
 368             V_R8(retv) = n;
 369         }
 370
 371         return S_OK;
 372     }
 373     case JSV_BOOL:
 374         V_VT(retv) = VT_BOOL;
 375         V_BOOL(retv) = get_bool(val) ? VARIANT_TRUE : VARIANT_FALSE;
 376         return S_OK;
 377     case JSV_VARIANT:
 378         V_VT(retv) = VT_EMPTY;
 379         return VariantCopy(retv, get_variant(val));
 380     }
 381
 382     assert(0);
 383     return E_FAIL;
 384 }
 385
 386 /* ECMA-262 3rd Edition    9.1 */
 387 HRESULT to_primitive(script_ctx_t *ctx, jsval_t val, jsval_t *ret, hint_t hint)
 388 {
 389     if(is_object_instance(val)) {
 390         jsdisp_t *jsdisp;
 391         jsval_t prim;
 392         DISPID id;
 393         HRESULT hres;
 394
 395         static const WCHAR toStringW[] = {'t','o','S','t','r','i','n','g',0};
 396         static const WCHAR valueOfW[] = {'v','a','l','u','e','O','f',0};
 397
 398         if(!get_object(val)) {
 399             *ret = jsval_null();
 400             return S_OK;
 401         }
 402
 403         jsdisp = iface_to_jsdisp((IUnknown*)get_object(val));
 404         if(!jsdisp)
 405             return disp_propget(ctx, get_object(val), DISPID_VALUE, ret);
 406
 407         if(hint == NO_HINT)
 408             hint = is_class(jsdisp, JSCLASS_DATE) ? HINT_STRING : HINT_NUMBER;
 409
 410         /* Native implementation doesn't throw TypeErrors, returns strange values */
 411
 412         hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? toStringW : valueOfW, 0, &id);
 413         if(SUCCEEDED(hres)) {
 414             hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, 0, NULL, &prim);
 415             if(FAILED(hres)) {
 416                 WARN("call error - forwarding exception\n");
 417                 jsdisp_release(jsdisp);
 418                 return hres;
 419             }else if(!is_object_instance(prim)) {
 420                 jsdisp_release(jsdisp);
 421                 *ret = prim;
 422                 return S_OK;
 423             }else {
 424                 IDispatch_Release(get_object(prim));
 425             }
 426         }
 427
 428         hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? valueOfW : toStringW, 0, &id);
 429         if(SUCCEEDED(hres)) {
 430             hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, 0, NULL, &prim);
 431             if(FAILED(hres)) {
 432                 WARN("call error - forwarding exception\n");
 433                 jsdisp_release(jsdisp);
 434                 return hres;
 435             }else if(!is_object_instance(prim)) {
 436                 jsdisp_release(jsdisp);
 437                 *ret = prim;
 438                 return S_OK;
 439             }else {
 440                 IDispatch_Release(get_object(prim));
 441             }
 442         }
 443
 444         jsdisp_release(jsdisp);
 445
 446         WARN("failed\n");
 447         return throw_type_error(ctx, JS_E_TO_PRIMITIVE, NULL);
 448     }
 449
 450     return jsval_copy(val, ret);
 451
 452 }
 453
 454 /* ECMA-262 3rd Edition    9.2 */
 455 HRESULT to_boolean(jsval_t val, BOOL *ret)
 456 {
 457     switch(jsval_type(val)) {
 458     case JSV_UNDEFINED:
 459     case JSV_NULL:
 460         *ret = FALSE;
 461         return S_OK;
 462     case JSV_OBJECT:
 463         *ret = get_object(val) != NULL;
 464         return S_OK;
 465     case JSV_STRING:
 466         *ret = jsstr_length(get_string(val)) != 0;
 467         return S_OK;
 468     case JSV_NUMBER:
 469         *ret = !isnan(get_number(val)) && get_number(val);
 470         return S_OK;
 471     case JSV_BOOL:
 472         *ret = get_bool(val);
 473         return S_OK;
 474     case JSV_VARIANT:
 475         FIXME("unimplemented for variant %s\n", debugstr_variant(get_variant(val)));
 476         return E_NOTIMPL;
 477     }
 478
 479     assert(0);
 480     return E_FAIL;
 481 }
 482
 483 static int hex_to_int(WCHAR c)
 484 {
 485     if('0' <= c && c <= '9')
 486         return c-'0';
 487
 488     if('a' <= c && c <= 'f')
 489         return c-'a'+10;
 490
 491     if('A' <= c && c <= 'F')
 492         return c-'A'+10;
 493
 494     return -1;
 495 }
 496
 497 /* ECMA-262 3rd Edition    9.3.1 */
 498 static HRESULT str_to_number(jsstr_t *str, double *ret)
 499 {
 500     const WCHAR *ptr;
 501     BOOL neg = FALSE;
 502     DOUBLE d = 0.0;
 503
 504     static const WCHAR infinityW[] = {'I','n','f','i','n','i','t','y'};
 505
 506     ptr = jsstr_flatten(str);
 507     if(!ptr)
 508         return E_OUTOFMEMORY;
 509
 510     while(isspaceW(*ptr))
 511         ptr++;
 512
 513     if(*ptr == '-') {
 514         neg = TRUE;
 515         ptr++;
 516     }else if(*ptr == '+') {
 517         ptr++;
 518     }
 519
 520     if(!strncmpW(ptr, infinityW, sizeof(infinityW)/sizeof(WCHAR))) {
 521         ptr += sizeof(infinityW)/sizeof(WCHAR);
 522         while(*ptr && isspaceW(*ptr))
 523             ptr++;
 524
 525         if(*ptr)
 526             *ret = NAN;
 527         else
 528             *ret = neg ? -INFINITY : INFINITY;
 529         return S_OK;
 530     }
 531
 532     if(*ptr == '0' && ptr[1] == 'x') {
 533         DWORD l = 0;
 534
 535         ptr += 2;
 536         while((l = hex_to_int(*ptr)) != -1) {
 537             d = d*16 + l;
 538             ptr++;
 539         }
 540
 541         *ret = d;
 542         return S_OK;
 543     }
 544
 545     while(isdigitW(*ptr))
 546         d = d*10 + (*ptr++ - '0');
 547
 548     if(*ptr == 'e' || *ptr == 'E') {
 549         BOOL eneg = FALSE;
 550         LONG l = 0;
 551
 552         ptr++;
 553         if(*ptr == '-') {
 554             ptr++;
 555             eneg = TRUE;
 556         }else if(*ptr == '+') {
 557             ptr++;
 558         }
 559
 560         while(isdigitW(*ptr))
 561             l = l*10 + (*ptr++ - '0');
 562         if(eneg)
 563             l = -l;
 564
 565         d *= pow(10, l);
 566     }else if(*ptr == '.') {
 567         DOUBLE dec = 0.1;
 568
 569         ptr++;
 570         while(isdigitW(*ptr)) {
 571             d += dec * (*ptr++ - '0');
 572             dec *= 0.1;
 573         }
 574     }
 575
 576     while(isspaceW(*ptr))
 577         ptr++;
 578
 579     if(*ptr) {
 580         *ret = NAN;
 581         return S_OK;
 582     }
 583
 584     if(neg)
 585         d = -d;
 586
 587     *ret = d;
 588     return S_OK;
 589 }
 590
 591 /* ECMA-262 3rd Edition    9.3 */
 592 HRESULT to_number(script_ctx_t *ctx, jsval_t val, double *ret)
 593 {
 594     switch(jsval_type(val)) {
 595     case JSV_UNDEFINED:
 596         *ret = NAN;
 597         return S_OK;
 598     case JSV_NULL:
 599         *ret = 0;
 600         return S_OK;
 601     case JSV_NUMBER:
 602         *ret = get_number(val);
 603         return S_OK;
 604     case JSV_STRING:
 605         return str_to_number(get_string(val), ret);
 606     case JSV_OBJECT: {
 607         jsval_t prim;
 608         HRESULT hres;
 609
 610         hres = to_primitive(ctx, val, &prim, HINT_NUMBER);
 611         if(FAILED(hres))
 612             return hres;
 613
 614         hres = to_number(ctx, prim, ret);
 615         jsval_release(prim);
 616         return hres;
 617     }
 618     case JSV_BOOL:
 619         *ret = get_bool(val) ? 1 : 0;
 620         return S_OK;
 621     case JSV_VARIANT:
 622         FIXME("unimplemented for variant %s\n", debugstr_variant(get_variant(val)));
 623         return E_NOTIMPL;
 624     };
 625
 626     assert(0);
 627     return E_FAIL;
 628 }
 629
 630 /* ECMA-262 3rd Edition    9.4 */
 631 HRESULT to_integer(script_ctx_t *ctx, jsval_t v, double *ret)
 632 {
 633     double n;
 634     HRESULT hres;
 635
 636     hres = to_number(ctx, v, &n);
 637     if(FAILED(hres))
 638         return hres;
 639
 640     if(isnan(n))
 641         *ret = 0;
 642     else
 643         *ret = n >= 0.0 ? floor(n) : -floor(-n);
 644     return S_OK;
 645 }
 646
 647 /* ECMA-262 3rd Edition    9.5 */
 648 HRESULT to_int32(script_ctx_t *ctx, jsval_t v, INT *ret)
 649 {
 650     double n;
 651     HRESULT hres;
 652
 653     hres = to_number(ctx, v, &n);
 654     if(FAILED(hres))
 655         return hres;
 656
 657     *ret = isnan(n) || isinf(n) ? 0 : n;
 658     return S_OK;
 659 }
 660
 661 /* ECMA-262 3rd Edition    9.6 */
 662 HRESULT to_uint32(script_ctx_t *ctx, jsval_t val, DWORD *ret)
 663 {
 664     INT32 n;
 665     HRESULT hres;
 666
 667     hres = to_int32(ctx, val, &n);
 668     if(SUCCEEDED(hres))
 669         *ret = n;
 670     return hres;
 671 }
 672
 673 static jsstr_t *int_to_string(int i)
 674 {
 675     WCHAR buf[12], *p;
 676     BOOL neg = FALSE;
 677
 678     if(!i) {
 679         static const WCHAR zeroW[] = {'0',0};
 680         return jsstr_alloc(zeroW);
 681     }
 682
 683     if(i < 0) {
 684         neg = TRUE;
 685         i = -i;
 686     }
 687
 688     p = buf + sizeof(buf)/sizeof(*buf)-1;
 689     *p-- = 0;
 690     while(i) {
 691         *p-- = i%10 + '0';
 692         i /= 10;
 693     }
 694
 695     if(neg)
 696         *p = '-';
 697     else
 698         p++;
 699
 700     return jsstr_alloc(p);
 701 }
 702
 703 HRESULT double_to_string(double n, jsstr_t **str)
 704 {
 705     const WCHAR InfinityW[] = {'-','I','n','f','i','n','i','t','y',0};
 706
 707     if(isnan(n)) {
 708         *str = jsstr_nan();
 709     }else if(isinf(n)) {
 710         *str = jsstr_alloc(n<0 ? InfinityW : InfinityW+1);
 711     }else if(is_int32(n)) {
 712         *str = int_to_string(n);
 713     }else {
 714         VARIANT strv, v;
 715         HRESULT hres;
 716
 717         /* FIXME: Don't use VariantChangeTypeEx */
 718         V_VT(&v) = VT_R8;
 719         V_R8(&v) = n;
 720         V_VT(&strv) = VT_EMPTY;
 721         hres = VariantChangeTypeEx(&strv, &v, MAKELCID(MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US),SORT_DEFAULT), 0, VT_BSTR);
 722         if(FAILED(hres))
 723             return hres;
 724
 725         *str = jsstr_alloc(V_BSTR(&strv));
 726         SysFreeString(V_BSTR(&strv));
 727     }
 728
 729     return *str ? S_OK : E_OUTOFMEMORY;
 730 }
 731
 732 /* ECMA-262 3rd Edition    9.8 */
 733 HRESULT to_string(script_ctx_t *ctx, jsval_t val, jsstr_t **str)
 734 {
 735     const WCHAR nullW[] = {'n','u','l','l',0};
 736     const WCHAR trueW[] = {'t','r','u','e',0};
 737     const WCHAR falseW[] = {'f','a','l','s','e',0};
 738
 739     switch(jsval_type(val)) {
 740     case JSV_UNDEFINED:
 741         *str = jsstr_undefined();
 742         return S_OK;
 743     case JSV_NULL:
 744         *str = jsstr_alloc(nullW);
 745         break;
 746     case JSV_NUMBER:
 747         return double_to_string(get_number(val), str);
 748     case JSV_STRING:
 749         *str = jsstr_addref(get_string(val));
 750         break;
 751     case JSV_OBJECT: {
 752         jsval_t prim;
 753         HRESULT hres;
 754
 755         hres = to_primitive(ctx, val, &prim, HINT_STRING);
 756         if(FAILED(hres))
 757             return hres;
 758
 759         hres = to_string(ctx, prim, str);
 760         jsval_release(prim);
 761         return hres;
 762     }
 763     case JSV_BOOL:
 764         *str = jsstr_alloc(get_bool(val) ? trueW : falseW);
 765         break;
 766     default:
 767         FIXME("unsupported %s\n", debugstr_jsval(val));
 768         return E_NOTIMPL;
 769     }
 770
 771     return *str ? S_OK : E_OUTOFMEMORY;
 772 }
 773
 774 HRESULT to_flat_string(script_ctx_t *ctx, jsval_t val, jsstr_t **str, const WCHAR **ret_str)
 775 {
 776     HRESULT hres;
 777
 778     hres = to_string(ctx, val, str);
 779     if(FAILED(hres))
 780         return hres;
 781
 782     *ret_str = jsstr_flatten(*str);
 783     if(!*ret_str) {
 784         jsstr_release(*str);
 785         return E_OUTOFMEMORY;
 786     }
 787
 788     return S_OK;
 789 }
 790
 791 /* ECMA-262 3rd Edition    9.9 */
 792 HRESULT to_object(script_ctx_t *ctx, jsval_t val, IDispatch **disp)
 793 {
 794     jsdisp_t *dispex;
 795     HRESULT hres;
 796
 797     switch(jsval_type(val)) {
 798     case JSV_STRING:
 799         hres = create_string(ctx, get_string(val), &dispex);
 800         if(FAILED(hres))
 801             return hres;
 802
 803         *disp = to_disp(dispex);
 804         break;
 805     case JSV_NUMBER:
 806         hres = create_number(ctx, get_number(val), &dispex);
 807         if(FAILED(hres))
 808             return hres;
 809
 810         *disp = to_disp(dispex);
 811         break;
 812     case JSV_OBJECT:
 813         if(get_object(val)) {
 814             *disp = get_object(val);
 815             IDispatch_AddRef(*disp);
 816         }else {
 817             jsdisp_t *obj;
 818
 819             hres = create_object(ctx, NULL, &obj);
 820             if(FAILED(hres))
 821                 return hres;
 822
 823             *disp = to_disp(obj);
 824         }
 825         break;
 826     case JSV_BOOL:
 827         hres = create_bool(ctx, get_bool(val), &dispex);
 828         if(FAILED(hres))
 829             return hres;
 830
 831         *disp = to_disp(dispex);
 832         break;
 833     case JSV_UNDEFINED:
 834     case JSV_NULL:
 835         WARN("object expected\n");
 836         return throw_type_error(ctx, JS_E_OBJECT_EXPECTED, NULL);
 837     case JSV_VARIANT:
 838         switch(V_VT(get_variant(val))) {
 839         case VT_ARRAY|VT_VARIANT:
 840             hres = create_vbarray(ctx, V_ARRAY(get_variant(val)), &dispex);
 841             if(FAILED(hres))
 842                 return hres;
 843
 844             *disp = to_disp(dispex);
 845             break;
 846
 847         default:
 848             FIXME("Unsupported %s\n", debugstr_variant(get_variant(val)));
 849             return E_NOTIMPL;
 850         }
 851         break;
 852     }
 853
 854     return S_OK;
 855 }
 856
 857 HRESULT variant_change_type(script_ctx_t *ctx, VARIANT *dst, VARIANT *src, VARTYPE vt)
 858 {
 859     jsval_t val;
 860     HRESULT hres;
 861
 862     clear_ei(ctx);
 863     hres = variant_to_jsval(src, &val);
 864     if(FAILED(hres))
 865         return hres;
 866
 867     switch(vt) {
 868     case VT_I2:
 869     case VT_I4: {
 870         INT i;
 871
 872         hres = to_int32(ctx, val, &i);
 873         if(SUCCEEDED(hres)) {
 874             if(vt == VT_I4)
 875                 V_I4(dst) = i;
 876             else
 877                 V_I2(dst) = i;
 878         }
 879         break;
 880     }
 881     case VT_R8: {
 882         double n;
 883         hres = to_number(ctx, val, &n);
 884         if(SUCCEEDED(hres))
 885             V_R8(dst) = n;
 886         break;
 887     }
 888     case VT_R4: {
 889         double n;
 890
 891         hres = to_number(ctx, val, &n);
 892         if(SUCCEEDED(hres))
 893             V_R4(dst) = n;
 894         break;
 895     }
 896     case VT_BOOL: {
 897         BOOL b;
 898
 899         hres = to_boolean(val, &b);
 900         if(SUCCEEDED(hres))
 901             V_BOOL(dst) = b ? VARIANT_TRUE : VARIANT_FALSE;
 902         break;
 903     }
 904     case VT_BSTR: {
 905         jsstr_t *str;
 906
 907         hres = to_string(ctx, val, &str);
 908         if(FAILED(hres))
 909             break;
 910
 911         if(is_null_bstr(str)) {
 912             V_BSTR(dst) = NULL;
 913             break;
 914         }
 915
 916         V_BSTR(dst) = SysAllocStringLen(NULL, jsstr_length(str));
 917         if(V_BSTR(dst))
 918             jsstr_flush(str, V_BSTR(dst));
 919         else
 920             hres = E_OUTOFMEMORY;
 921         break;
 922     }
 923     case VT_EMPTY:
 924         hres = V_VT(src) == VT_EMPTY ? S_OK : E_NOTIMPL;
 925         break;
 926     case VT_NULL:
 927         hres = V_VT(src) == VT_NULL ? S_OK : E_NOTIMPL;
 928         break;
 929     default:
 930         FIXME("vt %d not implemented\n", vt);
 931         hres = E_NOTIMPL;
 932     }
 933
 934     jsval_release(val);
 935     if(FAILED(hres))
 936         return hres;
 937
 938     V_VT(dst) = vt;
 939     return S_OK;
 940 }
 941
 942 static inline JSCaller *impl_from_IServiceProvider(IServiceProvider *iface)
 943 {
 944     return CONTAINING_RECORD(iface, JSCaller, IServiceProvider_iface);
 945 }
 946
 947 static HRESULT WINAPI JSCaller_QueryInterface(IServiceProvider *iface, REFIID riid, void **ppv)
 948 {
 949     JSCaller *This = impl_from_IServiceProvider(iface);
 950
 951     if(IsEqualGUID(&IID_IUnknown, riid)) {
 952         TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv);
 953         *ppv = &This->IServiceProvider_iface;
 954     }else if(IsEqualGUID(&IID_IServiceProvider, riid)) {
 955         TRACE("(%p)->(IID_IServiceProvider %p)\n", This, ppv);
 956         *ppv = &This->IServiceProvider_iface;
 957     }else {
 958         WARN("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppv);
 959         *ppv = NULL;
 960         return E_NOINTERFACE;
 961     }
 962
 963     IUnknown_AddRef((IUnknown*)*ppv);
 964     return S_OK;
 965 }
 966
 967 static ULONG WINAPI JSCaller_AddRef(IServiceProvider *iface)
 968 {
 969     JSCaller *This = impl_from_IServiceProvider(iface);
 970     LONG ref = InterlockedIncrement(&This->ref);
 971
 972     TRACE("(%p) ref=%d\n", This, ref);
 973
 974     return ref;
 975 }
 976
 977 static ULONG WINAPI JSCaller_Release(IServiceProvider *iface)
 978 {
 979     JSCaller *This = impl_from_IServiceProvider(iface);
 980     LONG ref = InterlockedIncrement(&This->ref);
 981
 982     TRACE("(%p) ref=%d\n", This, ref);
 983
 984     if(!ref) {
 985         assert(!This->ctx);
 986         heap_free(This);
 987     }
 988
 989     return ref;
 990 }
 991
 992 static HRESULT WINAPI JSCaller_QueryService(IServiceProvider *iface, REFGUID guidService,
 993         REFIID riid, void **ppv)
 994 {
 995     JSCaller *This = impl_from_IServiceProvider(iface);
 996
 997     if(IsEqualGUID(guidService, &SID_VariantConversion) && This->ctx && This->ctx->active_script) {
 998         TRACE("(%p)->(SID_VariantConversion)\n", This);
 999         return IActiveScript_QueryInterface(This->ctx->active_script, riid, ppv);
1000     }
1001
1002     FIXME("(%p)->(%s %s %p)\n", This, debugstr_guid(guidService), debugstr_guid(riid), ppv);
1003
1004     *ppv = NULL;
1005     return E_NOINTERFACE;
1006 }
1007
1008 static const IServiceProviderVtbl ServiceProviderVtbl = {
1009     JSCaller_QueryInterface,
1010     JSCaller_AddRef,
1011     JSCaller_Release,
1012     JSCaller_QueryService
1013 };
1014
1015 HRESULT create_jscaller(script_ctx_t *ctx)
1016 {
1017     JSCaller *ret;
1018
1019     ret = heap_alloc(sizeof(*ret));
1020     if(!ret)
1021         return E_OUTOFMEMORY;
1022
1023     ret->IServiceProvider_iface.lpVtbl = &ServiceProviderVtbl;
1024     ret->ref = 1;
1025     ret->ctx = ctx;
1026
1027     ctx->jscaller = ret;
1028     return S_OK;
1029 }