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_INT:
 301         *r = jsval_number(V_INT(var));
 302         return S_OK;
 303     case VT_UI4:
 304         *r = jsval_number(V_UI4(var));
 305         return S_OK;
 306     case VT_UNKNOWN:
 307         if(V_UNKNOWN(var)) {
 308             IDispatch *disp;
 309             HRESULT hres;
 310
 311             hres = IUnknown_QueryInterface(V_UNKNOWN(var), &IID_IDispatch, (void**)&disp);
 312             if(SUCCEEDED(hres)) {
 313                 *r = jsval_disp(disp);
 314                 return S_OK;
 315             }
 316         }else {
 317             *r = jsval_disp(NULL);
 318             return S_OK;
 319         }
 320         /* fall through */
 321     default:
 322         return jsval_variant(r, var);
 323     }
 324 }
 325
 326 HRESULT jsval_to_variant(jsval_t val, VARIANT *retv)
 327 {
 328     switch(jsval_type(val)) {
 329     case JSV_UNDEFINED:
 330         V_VT(retv) = VT_EMPTY;
 331         return S_OK;
 332     case JSV_NULL:
 333         V_VT(retv) = VT_NULL;
 334         return S_OK;
 335     case JSV_OBJECT:
 336         V_VT(retv) = VT_DISPATCH;
 337         if(get_object(val))
 338             IDispatch_AddRef(get_object(val));
 339         V_DISPATCH(retv) = get_object(val);
 340         return S_OK;
 341     case JSV_STRING: {
 342         jsstr_t *str = get_string(val);
 343
 344         V_VT(retv) = VT_BSTR;
 345         if(is_null_bstr(str)) {
 346             V_BSTR(retv) = NULL;
 347         }else {
 348             V_BSTR(retv) = SysAllocStringLen(NULL, jsstr_length(str));
 349             if(V_BSTR(retv))
 350                 jsstr_flush(str, V_BSTR(retv));
 351             else
 352                 return E_OUTOFMEMORY;
 353         }
 354         return S_OK;
 355     }
 356     case JSV_NUMBER: {
 357         double n = get_number(val);
 358
 359         if(is_int32(n)) {
 360             V_VT(retv) = VT_I4;
 361             V_I4(retv) = n;
 362         }else {
 363             V_VT(retv) = VT_R8;
 364             V_R8(retv) = n;
 365         }
 366
 367         return S_OK;
 368     }
 369     case JSV_BOOL:
 370         V_VT(retv) = VT_BOOL;
 371         V_BOOL(retv) = get_bool(val) ? VARIANT_TRUE : VARIANT_FALSE;
 372         return S_OK;
 373     case JSV_VARIANT:
 374         V_VT(retv) = VT_EMPTY;
 375         return VariantCopy(retv, get_variant(val));
 376     }
 377
 378     assert(0);
 379     return E_FAIL;
 380 }
 381
 382 /* ECMA-262 3rd Edition    9.1 */
 383 HRESULT to_primitive(script_ctx_t *ctx, jsval_t val, jsval_t *ret, hint_t hint)
 384 {
 385     if(is_object_instance(val)) {
 386         jsdisp_t *jsdisp;
 387         jsval_t prim;
 388         DISPID id;
 389         HRESULT hres;
 390
 391         static const WCHAR toStringW[] = {'t','o','S','t','r','i','n','g',0};
 392         static const WCHAR valueOfW[] = {'v','a','l','u','e','O','f',0};
 393
 394         if(!get_object(val)) {
 395             *ret = jsval_null();
 396             return S_OK;
 397         }
 398
 399         jsdisp = iface_to_jsdisp(get_object(val));
 400         if(!jsdisp)
 401             return disp_propget(ctx, get_object(val), DISPID_VALUE, ret);
 402
 403         if(hint == NO_HINT)
 404             hint = is_class(jsdisp, JSCLASS_DATE) ? HINT_STRING : HINT_NUMBER;
 405
 406         /* Native implementation doesn't throw TypeErrors, returns strange values */
 407
 408         hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? toStringW : valueOfW, 0, &id);
 409         if(SUCCEEDED(hres)) {
 410             hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, 0, NULL, &prim);
 411             if(FAILED(hres)) {
 412                 WARN("call error - forwarding exception\n");
 413                 jsdisp_release(jsdisp);
 414                 return hres;
 415             }else if(!is_object_instance(prim)) {
 416                 jsdisp_release(jsdisp);
 417                 *ret = prim;
 418                 return S_OK;
 419             }else {
 420                 IDispatch_Release(get_object(prim));
 421             }
 422         }
 423
 424         hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? valueOfW : toStringW, 0, &id);
 425         if(SUCCEEDED(hres)) {
 426             hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, 0, NULL, &prim);
 427             if(FAILED(hres)) {
 428                 WARN("call error - forwarding exception\n");
 429                 jsdisp_release(jsdisp);
 430                 return hres;
 431             }else if(!is_object_instance(prim)) {
 432                 jsdisp_release(jsdisp);
 433                 *ret = prim;
 434                 return S_OK;
 435             }else {
 436                 IDispatch_Release(get_object(prim));
 437             }
 438         }
 439
 440         jsdisp_release(jsdisp);
 441
 442         WARN("failed\n");
 443         return throw_type_error(ctx, JS_E_TO_PRIMITIVE, NULL);
 444     }
 445
 446     return jsval_copy(val, ret);
 447
 448 }
 449
 450 /* ECMA-262 3rd Edition    9.2 */
 451 HRESULT to_boolean(jsval_t val, BOOL *ret)
 452 {
 453     switch(jsval_type(val)) {
 454     case JSV_UNDEFINED:
 455     case JSV_NULL:
 456         *ret = FALSE;
 457         return S_OK;
 458     case JSV_OBJECT:
 459         *ret = get_object(val) != NULL;
 460         return S_OK;
 461     case JSV_STRING:
 462         *ret = jsstr_length(get_string(val)) != 0;
 463         return S_OK;
 464     case JSV_NUMBER:
 465         *ret = !isnan(get_number(val)) && get_number(val);
 466         return S_OK;
 467     case JSV_BOOL:
 468         *ret = get_bool(val);
 469         return S_OK;
 470     case JSV_VARIANT:
 471         FIXME("unimplemented for variant %s\n", debugstr_variant(get_variant(val)));
 472         return E_NOTIMPL;
 473     }
 474
 475     assert(0);
 476     return E_FAIL;
 477 }
 478
 479 static int hex_to_int(WCHAR c)
 480 {
 481     if('0' <= c && c <= '9')
 482         return c-'0';
 483
 484     if('a' <= c && c <= 'f')
 485         return c-'a'+10;
 486
 487     if('A' <= c && c <= 'F')
 488         return c-'A'+10;
 489
 490     return -1;
 491 }
 492
 493 /* ECMA-262 3rd Edition    9.3.1 */
 494 static HRESULT str_to_number(jsstr_t *str, double *ret)
 495 {
 496     const WCHAR *ptr;
 497     BOOL neg = FALSE;
 498     DOUBLE d = 0.0;
 499
 500     static const WCHAR infinityW[] = {'I','n','f','i','n','i','t','y'};
 501
 502     ptr = jsstr_flatten(str);
 503     if(!ptr)
 504         return E_OUTOFMEMORY;
 505
 506     while(isspaceW(*ptr))
 507         ptr++;
 508
 509     if(*ptr == '-') {
 510         neg = TRUE;
 511         ptr++;
 512     }else if(*ptr == '+') {
 513         ptr++;
 514     }
 515
 516     if(!strncmpW(ptr, infinityW, sizeof(infinityW)/sizeof(WCHAR))) {
 517         ptr += sizeof(infinityW)/sizeof(WCHAR);
 518         while(*ptr && isspaceW(*ptr))
 519             ptr++;
 520
 521         if(*ptr)
 522             *ret = NAN;
 523         else
 524             *ret = neg ? -INFINITY : INFINITY;
 525         return S_OK;
 526     }
 527
 528     if(*ptr == '0' && ptr[1] == 'x') {
 529         DWORD l = 0;
 530
 531         ptr += 2;
 532         while((l = hex_to_int(*ptr)) != -1) {
 533             d = d*16 + l;
 534             ptr++;
 535         }
 536
 537         *ret = d;
 538         return S_OK;
 539     }
 540
 541     while(isdigitW(*ptr))
 542         d = d*10 + (*ptr++ - '0');
 543
 544     if(*ptr == 'e' || *ptr == 'E') {
 545         BOOL eneg = FALSE;
 546         LONG l = 0;
 547
 548         ptr++;
 549         if(*ptr == '-') {
 550             ptr++;
 551             eneg = TRUE;
 552         }else if(*ptr == '+') {
 553             ptr++;
 554         }
 555
 556         while(isdigitW(*ptr))
 557             l = l*10 + (*ptr++ - '0');
 558         if(eneg)
 559             l = -l;
 560
 561         d *= pow(10, l);
 562     }else if(*ptr == '.') {
 563         DOUBLE dec = 0.1;
 564
 565         ptr++;
 566         while(isdigitW(*ptr)) {
 567             d += dec * (*ptr++ - '0');
 568             dec *= 0.1;
 569         }
 570     }
 571
 572     while(isspaceW(*ptr))
 573         ptr++;
 574
 575     if(*ptr) {
 576         *ret = NAN;
 577         return S_OK;
 578     }
 579
 580     if(neg)
 581         d = -d;
 582
 583     *ret = d;
 584     return S_OK;
 585 }
 586
 587 /* ECMA-262 3rd Edition    9.3 */
 588 HRESULT to_number(script_ctx_t *ctx, jsval_t val, double *ret)
 589 {
 590     switch(jsval_type(val)) {
 591     case JSV_UNDEFINED:
 592         *ret = NAN;
 593         return S_OK;
 594     case JSV_NULL:
 595         *ret = 0;
 596         return S_OK;
 597     case JSV_NUMBER:
 598         *ret = get_number(val);
 599         return S_OK;
 600     case JSV_STRING:
 601         return str_to_number(get_string(val), ret);
 602     case JSV_OBJECT: {
 603         jsval_t prim;
 604         HRESULT hres;
 605
 606         hres = to_primitive(ctx, val, &prim, HINT_NUMBER);
 607         if(FAILED(hres))
 608             return hres;
 609
 610         hres = to_number(ctx, prim, ret);
 611         jsval_release(prim);
 612         return hres;
 613     }
 614     case JSV_BOOL:
 615         *ret = get_bool(val) ? 1 : 0;
 616         return S_OK;
 617     case JSV_VARIANT:
 618         FIXME("unimplemented for variant %s\n", debugstr_variant(get_variant(val)));
 619         return E_NOTIMPL;
 620     };
 621
 622     assert(0);
 623     return E_FAIL;
 624 }
 625
 626 /* ECMA-262 3rd Edition    9.4 */
 627 HRESULT to_integer(script_ctx_t *ctx, jsval_t v, double *ret)
 628 {
 629     double n;
 630     HRESULT hres;
 631
 632     hres = to_number(ctx, v, &n);
 633     if(FAILED(hres))
 634         return hres;
 635
 636     if(isnan(n))
 637         *ret = 0;
 638     else
 639         *ret = n >= 0.0 ? floor(n) : -floor(-n);
 640     return S_OK;
 641 }
 642
 643 /* ECMA-262 3rd Edition    9.5 */
 644 HRESULT to_int32(script_ctx_t *ctx, jsval_t v, INT *ret)
 645 {
 646     double n;
 647     HRESULT hres;
 648
 649     hres = to_number(ctx, v, &n);
 650     if(FAILED(hres))
 651         return hres;
 652
 653     *ret = is_finite(n) ? n : 0;
 654     return S_OK;
 655 }
 656
 657 /* ECMA-262 3rd Edition    9.6 */
 658 HRESULT to_uint32(script_ctx_t *ctx, jsval_t val, DWORD *ret)
 659 {
 660     INT32 n;
 661     HRESULT hres;
 662
 663     hres = to_int32(ctx, val, &n);
 664     if(SUCCEEDED(hres))
 665         *ret = n;
 666     return hres;
 667 }
 668
 669 static jsstr_t *int_to_string(int i)
 670 {
 671     WCHAR buf[12], *p;
 672     BOOL neg = FALSE;
 673
 674     if(!i) {
 675         static const WCHAR zeroW[] = {'0',0};
 676         return jsstr_alloc(zeroW);
 677     }
 678
 679     if(i < 0) {
 680         neg = TRUE;
 681         i = -i;
 682     }
 683
 684     p = buf + sizeof(buf)/sizeof(*buf)-1;
 685     *p-- = 0;
 686     while(i) {
 687         *p-- = i%10 + '0';
 688         i /= 10;
 689     }
 690
 691     if(neg)
 692         *p = '-';
 693     else
 694         p++;
 695
 696     return jsstr_alloc(p);
 697 }
 698
 699 HRESULT double_to_string(double n, jsstr_t **str)
 700 {
 701     const WCHAR InfinityW[] = {'-','I','n','f','i','n','i','t','y',0};
 702
 703     if(isnan(n)) {
 704         *str = jsstr_nan();
 705     }else if(isinf(n)) {
 706         *str = jsstr_alloc(n<0 ? InfinityW : InfinityW+1);
 707     }else if(is_int32(n)) {
 708         *str = int_to_string(n);
 709     }else {
 710         VARIANT strv, v;
 711         HRESULT hres;
 712
 713         /* FIXME: Don't use VariantChangeTypeEx */
 714         V_VT(&v) = VT_R8;
 715         V_R8(&v) = n;
 716         V_VT(&strv) = VT_EMPTY;
 717         hres = VariantChangeTypeEx(&strv, &v, MAKELCID(MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US),SORT_DEFAULT), 0, VT_BSTR);
 718         if(FAILED(hres))
 719             return hres;
 720
 721         *str = jsstr_alloc(V_BSTR(&strv));
 722         SysFreeString(V_BSTR(&strv));
 723     }
 724
 725     return *str ? S_OK : E_OUTOFMEMORY;
 726 }
 727
 728 /* ECMA-262 3rd Edition    9.8 */
 729 HRESULT to_string(script_ctx_t *ctx, jsval_t val, jsstr_t **str)
 730 {
 731     const WCHAR nullW[] = {'n','u','l','l',0};
 732     const WCHAR trueW[] = {'t','r','u','e',0};
 733     const WCHAR falseW[] = {'f','a','l','s','e',0};
 734
 735     switch(jsval_type(val)) {
 736     case JSV_UNDEFINED:
 737         *str = jsstr_undefined();
 738         return S_OK;
 739     case JSV_NULL:
 740         *str = jsstr_alloc(nullW);
 741         break;
 742     case JSV_NUMBER:
 743         return double_to_string(get_number(val), str);
 744     case JSV_STRING:
 745         *str = jsstr_addref(get_string(val));
 746         break;
 747     case JSV_OBJECT: {
 748         jsval_t prim;
 749         HRESULT hres;
 750
 751         hres = to_primitive(ctx, val, &prim, HINT_STRING);
 752         if(FAILED(hres))
 753             return hres;
 754
 755         hres = to_string(ctx, prim, str);
 756         jsval_release(prim);
 757         return hres;
 758     }
 759     case JSV_BOOL:
 760         *str = jsstr_alloc(get_bool(val) ? trueW : falseW);
 761         break;
 762     default:
 763         FIXME("unsupported %s\n", debugstr_jsval(val));
 764         return E_NOTIMPL;
 765     }
 766
 767     return *str ? S_OK : E_OUTOFMEMORY;
 768 }
 769
 770 HRESULT to_flat_string(script_ctx_t *ctx, jsval_t val, jsstr_t **str, const WCHAR **ret_str)
 771 {
 772     HRESULT hres;
 773
 774     hres = to_string(ctx, val, str);
 775     if(FAILED(hres))
 776         return hres;
 777
 778     *ret_str = jsstr_flatten(*str);
 779     if(!*ret_str) {
 780         jsstr_release(*str);
 781         return E_OUTOFMEMORY;
 782     }
 783
 784     return S_OK;
 785 }
 786
 787 /* ECMA-262 3rd Edition    9.9 */
 788 HRESULT to_object(script_ctx_t *ctx, jsval_t val, IDispatch **disp)
 789 {
 790     jsdisp_t *dispex;
 791     HRESULT hres;
 792
 793     switch(jsval_type(val)) {
 794     case JSV_STRING:
 795         hres = create_string(ctx, get_string(val), &dispex);
 796         if(FAILED(hres))
 797             return hres;
 798
 799         *disp = to_disp(dispex);
 800         break;
 801     case JSV_NUMBER:
 802         hres = create_number(ctx, get_number(val), &dispex);
 803         if(FAILED(hres))
 804             return hres;
 805
 806         *disp = to_disp(dispex);
 807         break;
 808     case JSV_OBJECT:
 809         if(get_object(val)) {
 810             *disp = get_object(val);
 811             IDispatch_AddRef(*disp);
 812         }else {
 813             jsdisp_t *obj;
 814
 815             hres = create_object(ctx, NULL, &obj);
 816             if(FAILED(hres))
 817                 return hres;
 818
 819             *disp = to_disp(obj);
 820         }
 821         break;
 822     case JSV_BOOL:
 823         hres = create_bool(ctx, get_bool(val), &dispex);
 824         if(FAILED(hres))
 825             return hres;
 826
 827         *disp = to_disp(dispex);
 828         break;
 829     case JSV_UNDEFINED:
 830     case JSV_NULL:
 831         WARN("object expected\n");
 832         return throw_type_error(ctx, JS_E_OBJECT_EXPECTED, NULL);
 833     case JSV_VARIANT:
 834         switch(V_VT(get_variant(val))) {
 835         case VT_ARRAY|VT_VARIANT:
 836             hres = create_vbarray(ctx, V_ARRAY(get_variant(val)), &dispex);
 837             if(FAILED(hres))
 838                 return hres;
 839
 840             *disp = to_disp(dispex);
 841             break;
 842
 843         default:
 844             FIXME("Unsupported %s\n", debugstr_variant(get_variant(val)));
 845             return E_NOTIMPL;
 846         }
 847         break;
 848     }
 849
 850     return S_OK;
 851 }
 852
 853 HRESULT variant_change_type(script_ctx_t *ctx, VARIANT *dst, VARIANT *src, VARTYPE vt)
 854 {
 855     jsval_t val;
 856     HRESULT hres;
 857
 858     clear_ei(ctx);
 859     hres = variant_to_jsval(src, &val);
 860     if(FAILED(hres))
 861         return hres;
 862
 863     switch(vt) {
 864     case VT_I2:
 865     case VT_I4: {
 866         INT i;
 867
 868         hres = to_int32(ctx, val, &i);
 869         if(SUCCEEDED(hres)) {
 870             if(vt == VT_I4)
 871                 V_I4(dst) = i;
 872             else
 873                 V_I2(dst) = i;
 874         }
 875         break;
 876     }
 877     case VT_R8: {
 878         double n;
 879         hres = to_number(ctx, val, &n);
 880         if(SUCCEEDED(hres))
 881             V_R8(dst) = n;
 882         break;
 883     }
 884     case VT_R4: {
 885         double n;
 886
 887         hres = to_number(ctx, val, &n);
 888         if(SUCCEEDED(hres))
 889             V_R4(dst) = n;
 890         break;
 891     }
 892     case VT_BOOL: {
 893         BOOL b;
 894
 895         hres = to_boolean(val, &b);
 896         if(SUCCEEDED(hres))
 897             V_BOOL(dst) = b ? VARIANT_TRUE : VARIANT_FALSE;
 898         break;
 899     }
 900     case VT_BSTR: {
 901         jsstr_t *str;
 902
 903         hres = to_string(ctx, val, &str);
 904         if(FAILED(hres))
 905             break;
 906
 907         if(is_null_bstr(str)) {
 908             V_BSTR(dst) = NULL;
 909             break;
 910         }
 911
 912         V_BSTR(dst) = SysAllocStringLen(NULL, jsstr_length(str));
 913         if(V_BSTR(dst))
 914             jsstr_flush(str, V_BSTR(dst));
 915         else
 916             hres = E_OUTOFMEMORY;
 917         break;
 918     }
 919     case VT_EMPTY:
 920         hres = V_VT(src) == VT_EMPTY ? S_OK : E_NOTIMPL;
 921         break;
 922     case VT_NULL:
 923         hres = V_VT(src) == VT_NULL ? S_OK : E_NOTIMPL;
 924         break;
 925     default:
 926         FIXME("vt %d not implemented\n", vt);
 927         hres = E_NOTIMPL;
 928     }
 929
 930     jsval_release(val);
 931     if(FAILED(hres))
 932         return hres;
 933
 934     V_VT(dst) = vt;
 935     return S_OK;
 936 }
 937
 938 static inline JSCaller *impl_from_IServiceProvider(IServiceProvider *iface)
 939 {
 940     return CONTAINING_RECORD(iface, JSCaller, IServiceProvider_iface);
 941 }
 942
 943 static HRESULT WINAPI JSCaller_QueryInterface(IServiceProvider *iface, REFIID riid, void **ppv)
 944 {
 945     JSCaller *This = impl_from_IServiceProvider(iface);
 946
 947     if(IsEqualGUID(&IID_IUnknown, riid)) {
 948         TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv);
 949         *ppv = &This->IServiceProvider_iface;
 950     }else if(IsEqualGUID(&IID_IServiceProvider, riid)) {
 951         TRACE("(%p)->(IID_IServiceProvider %p)\n", This, ppv);
 952         *ppv = &This->IServiceProvider_iface;
 953     }else {
 954         WARN("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppv);
 955         *ppv = NULL;
 956         return E_NOINTERFACE;
 957     }
 958
 959     IUnknown_AddRef((IUnknown*)*ppv);
 960     return S_OK;
 961 }
 962
 963 static ULONG WINAPI JSCaller_AddRef(IServiceProvider *iface)
 964 {
 965     JSCaller *This = impl_from_IServiceProvider(iface);
 966     LONG ref = InterlockedIncrement(&This->ref);
 967
 968     TRACE("(%p) ref=%d\n", This, ref);
 969
 970     return ref;
 971 }
 972
 973 static ULONG WINAPI JSCaller_Release(IServiceProvider *iface)
 974 {
 975     JSCaller *This = impl_from_IServiceProvider(iface);
 976     LONG ref = InterlockedIncrement(&This->ref);
 977
 978     TRACE("(%p) ref=%d\n", This, ref);
 979
 980     if(!ref) {
 981         assert(!This->ctx);
 982         heap_free(This);
 983     }
 984
 985     return ref;
 986 }
 987
 988 static HRESULT WINAPI JSCaller_QueryService(IServiceProvider *iface, REFGUID guidService,
 989         REFIID riid, void **ppv)
 990 {
 991     JSCaller *This = impl_from_IServiceProvider(iface);
 992
 993     if(IsEqualGUID(guidService, &SID_VariantConversion) && This->ctx && This->ctx->active_script) {
 994         TRACE("(%p)->(SID_VariantConversion)\n", This);
 995         return IActiveScript_QueryInterface(This->ctx->active_script, riid, ppv);
 996     }
 997
 998     FIXME("(%p)->(%s %s %p)\n", This, debugstr_guid(guidService), debugstr_guid(riid), ppv);
 999
1000     *ppv = NULL;
1001     return E_NOINTERFACE;
1002 }
1003
1004 static const IServiceProviderVtbl ServiceProviderVtbl = {
1005     JSCaller_QueryInterface,
1006     JSCaller_AddRef,
1007     JSCaller_Release,
1008     JSCaller_QueryService
1009 };
1010
1011 HRESULT create_jscaller(script_ctx_t *ctx)
1012 {
1013     JSCaller *ret;
1014
1015     ret = heap_alloc(sizeof(*ret));
1016     if(!ret)
1017         return E_OUTOFMEMORY;
1018
1019     ret->IServiceProvider_iface.lpVtbl = &ServiceProviderVtbl;
1020     ret->ref = 1;
1021     ret->ctx = ctx;
1022
1023     ctx->jscaller = ret;
1024     return S_OK;
1025 }