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_variant(const VARIANT *v)
  34 {
  35     if(!v)
  36         return "(null)";
  37
  38     switch(V_VT(v)) {
  39     case VT_EMPTY:
  40         return "{VT_EMPTY}";
  41     case VT_NULL:
  42         return "{VT_NULL}";
  43     case VT_I4:
  44         return wine_dbg_sprintf("{VT_I4: %d}", V_I4(v));
  45     case VT_UI4:
  46         return wine_dbg_sprintf("{VT_UI4: %u}", V_UI4(v));
  47     case VT_R8:
  48         return wine_dbg_sprintf("{VT_R8: %lf}", V_R8(v));
  49     case VT_BSTR:
  50         return wine_dbg_sprintf("{VT_BSTR: %s}", debugstr_w(V_BSTR(v)));
  51     case VT_DISPATCH:
  52         return wine_dbg_sprintf("{VT_DISPATCH: %p}", V_DISPATCH(v));
  53     case VT_BOOL:
  54         return wine_dbg_sprintf("{VT_BOOL: %x}", V_BOOL(v));
  55     case VT_ARRAY|VT_VARIANT:
  56         return "{VT_ARRAY|VT_VARIANT: ...}";
  57     default:
  58         return wine_dbg_sprintf("{vt %d}", V_VT(v));
  59     }
  60 }
  61
  62 const char *debugstr_jsval(const jsval_t v)
  63 {
  64     switch(jsval_type(v)) {
  65     case JSV_UNDEFINED:
  66         return "undefined";
  67     case JSV_NULL:
  68         return "null";
  69     case JSV_OBJECT:
  70         return wine_dbg_sprintf("obj(%p)", get_object(v));
  71     case JSV_STRING:
  72         return wine_dbg_sprintf("str(%s)", debugstr_jsstr(get_string(v)));
  73     case JSV_NUMBER:
  74         return wine_dbg_sprintf("%lf", get_number(v));
  75     case JSV_BOOL:
  76         return get_bool(v) ? "true" : "false";
  77     case JSV_VARIANT:
  78         return debugstr_variant(get_variant(v));
  79     }
  80
  81     assert(0);
  82     return NULL;
  83 }
  84
  85 #define MIN_BLOCK_SIZE  128
  86 #define ARENA_FREE_FILLER  0xaa
  87
  88 static inline DWORD block_size(DWORD block)
  89 {
  90     return MIN_BLOCK_SIZE << block;
  91 }
  92
  93 void heap_pool_init(heap_pool_t *heap)
  94 {
  95     memset(heap, 0, sizeof(*heap));
  96     list_init(&heap->custom_blocks);
  97 }
  98
  99 void *heap_pool_alloc(heap_pool_t *heap, DWORD size)
 100 {
 101     struct list *list;
 102     void *tmp;
 103
 104     if(!heap->block_cnt) {
 105         if(!heap->blocks) {
 106             heap->blocks = heap_alloc(sizeof(void*));
 107             if(!heap->blocks)
 108                 return NULL;
 109         }
 110
 111         tmp = heap_alloc(block_size(0));
 112         if(!tmp)
 113             return NULL;
 114
 115         heap->blocks[0] = tmp;
 116         heap->block_cnt = 1;
 117     }
 118
 119     if(heap->offset + size <= block_size(heap->last_block)) {
 120         tmp = ((BYTE*)heap->blocks[heap->last_block])+heap->offset;
 121         heap->offset += size;
 122         return tmp;
 123     }
 124
 125     if(size <= block_size(heap->last_block+1)) {
 126         if(heap->last_block+1 == heap->block_cnt) {
 127             tmp = heap_realloc(heap->blocks, (heap->block_cnt+1)*sizeof(void*));
 128             if(!tmp)
 129                 return NULL;
 130
 131             heap->blocks = tmp;
 132             heap->blocks[heap->block_cnt] = heap_alloc(block_size(heap->block_cnt));
 133             if(!heap->blocks[heap->block_cnt])
 134                 return NULL;
 135
 136             heap->block_cnt++;
 137         }
 138
 139         heap->last_block++;
 140         heap->offset = size;
 141         return heap->blocks[heap->last_block];
 142     }
 143
 144     list = heap_alloc(size + sizeof(struct list));
 145     if(!list)
 146         return NULL;
 147
 148     list_add_head(&heap->custom_blocks, list);
 149     return list+1;
 150 }
 151
 152 void *heap_pool_grow(heap_pool_t *heap, void *mem, DWORD size, DWORD inc)
 153 {
 154     void *ret;
 155
 156     if(mem == (BYTE*)heap->blocks[heap->last_block] + heap->offset-size
 157        && heap->offset+inc < block_size(heap->last_block)) {
 158         heap->offset += inc;
 159         return mem;
 160     }
 161
 162     ret = heap_pool_alloc(heap, size+inc);
 163     if(ret) /* FIXME: avoid copying for custom blocks */
 164         memcpy(ret, mem, size);
 165     return ret;
 166 }
 167
 168 void heap_pool_clear(heap_pool_t *heap)
 169 {
 170     struct list *tmp;
 171
 172     if(!heap)
 173         return;
 174
 175     while((tmp = list_next(&heap->custom_blocks, &heap->custom_blocks))) {
 176         list_remove(tmp);
 177         heap_free(tmp);
 178     }
 179
 180     if(WARN_ON(heap)) {
 181         DWORD i;
 182
 183         for(i=0; i < heap->block_cnt; i++)
 184             memset(heap->blocks[i], ARENA_FREE_FILLER, block_size(i));
 185     }
 186
 187     heap->last_block = heap->offset = 0;
 188     heap->mark = FALSE;
 189 }
 190
 191 void heap_pool_free(heap_pool_t *heap)
 192 {
 193     DWORD i;
 194
 195     heap_pool_clear(heap);
 196
 197     for(i=0; i < heap->block_cnt; i++)
 198         heap_free(heap->blocks[i]);
 199     heap_free(heap->blocks);
 200
 201     heap_pool_init(heap);
 202 }
 203
 204 heap_pool_t *heap_pool_mark(heap_pool_t *heap)
 205 {
 206     if(heap->mark)
 207         return NULL;
 208
 209     heap->mark = TRUE;
 210     return heap;
 211 }
 212
 213 void jsval_release(jsval_t val)
 214 {
 215     switch(jsval_type(val)) {
 216     case JSV_OBJECT:
 217         if(get_object(val))
 218             IDispatch_Release(get_object(val));
 219         break;
 220     case JSV_STRING:
 221         jsstr_release(get_string(val));
 222         break;
 223     case JSV_VARIANT:
 224         VariantClear(get_variant(val));
 225         heap_free(get_variant(val));
 226         break;
 227     default:
 228         break;
 229     }
 230 }
 231
 232 static HRESULT jsval_variant(jsval_t *val, VARIANT *var)
 233 {
 234     VARIANT *v;
 235     HRESULT hres;
 236
 237     __JSVAL_TYPE(*val) = JSV_VARIANT;
 238     __JSVAL_VAR(*val) = v = heap_alloc(sizeof(VARIANT));
 239     if(!v)
 240         return E_OUTOFMEMORY;
 241
 242     V_VT(v) = VT_EMPTY;
 243     hres = VariantCopy(v, var);
 244     if(FAILED(hres))
 245         heap_free(v);
 246     return hres;
 247 }
 248
 249 HRESULT jsval_copy(jsval_t v, jsval_t *r)
 250 {
 251     switch(jsval_type(v)) {
 252     case JSV_UNDEFINED:
 253     case JSV_NULL:
 254     case JSV_NUMBER:
 255     case JSV_BOOL:
 256         *r = v;
 257         return S_OK;
 258     case JSV_OBJECT:
 259         if(get_object(v))
 260             IDispatch_AddRef(get_object(v));
 261         *r = v;
 262         return S_OK;
 263     case JSV_STRING: {
 264         jsstr_addref(get_string(v));
 265         *r = v;
 266         return S_OK;
 267     }
 268     case JSV_VARIANT:
 269         return jsval_variant(r, get_variant(v));
 270     }
 271
 272     assert(0);
 273     return E_FAIL;
 274 }
 275
 276 HRESULT variant_to_jsval(VARIANT *var, jsval_t *r)
 277 {
 278     switch(V_VT(var)) {
 279     case VT_EMPTY:
 280         *r = jsval_undefined();
 281         return S_OK;
 282     case VT_NULL:
 283         *r = jsval_null();
 284         return S_OK;
 285     case VT_BOOL:
 286         *r = jsval_bool(V_BOOL(var));
 287         return S_OK;
 288     case VT_I4:
 289         *r = jsval_number(V_I4(var));
 290         return S_OK;
 291     case VT_R8:
 292         *r = jsval_number(V_R8(var));
 293         return S_OK;
 294     case VT_BSTR: {
 295         jsstr_t *str;
 296
 297         str = jsstr_alloc_len(V_BSTR(var), SysStringLen(V_BSTR(var)));
 298         if(!str)
 299             return E_OUTOFMEMORY;
 300         if(!V_BSTR(var))
 301             str->length_flags |= JSSTR_FLAG_NULLBSTR;
 302
 303         *r = jsval_string(str);
 304         return S_OK;
 305     }
 306     case VT_DISPATCH: {
 307         if(V_DISPATCH(var))
 308             IDispatch_AddRef(V_DISPATCH(var));
 309         *r = jsval_disp(V_DISPATCH(var));
 310         return S_OK;
 311     }
 312     case VT_I2:
 313         *r = jsval_number(V_I2(var));
 314         return S_OK;
 315     case VT_INT:
 316         *r = jsval_number(V_INT(var));
 317         return S_OK;
 318     case VT_UNKNOWN:
 319         if(V_UNKNOWN(var)) {
 320             IDispatch *disp;
 321             HRESULT hres;
 322
 323             hres = IUnknown_QueryInterface(V_UNKNOWN(var), &IID_IDispatch, (void**)&disp);
 324             if(SUCCEEDED(hres)) {
 325                 *r = jsval_disp(disp);
 326                 return S_OK;
 327             }
 328         }
 329         /* fall through */
 330     default:
 331         return jsval_variant(r, var);
 332     }
 333 }
 334
 335 HRESULT jsval_to_variant(jsval_t val, VARIANT *retv)
 336 {
 337     switch(jsval_type(val)) {
 338     case JSV_UNDEFINED:
 339         V_VT(retv) = VT_EMPTY;
 340         return S_OK;
 341     case JSV_NULL:
 342         V_VT(retv) = VT_NULL;
 343         return S_OK;
 344     case JSV_OBJECT:
 345         V_VT(retv) = VT_DISPATCH;
 346         if(get_object(val))
 347             IDispatch_AddRef(get_object(val));
 348         V_DISPATCH(retv) = get_object(val);
 349         return S_OK;
 350     case JSV_STRING: {
 351         jsstr_t *str = get_string(val);
 352
 353         V_VT(retv) = VT_BSTR;
 354         if(str->length_flags & JSSTR_FLAG_NULLBSTR) {
 355             V_BSTR(retv) = NULL;
 356         }else {
 357             V_BSTR(retv) = SysAllocStringLen(NULL, jsstr_length(str));
 358             if(V_BSTR(retv))
 359                 jsstr_flush(str, V_BSTR(retv));
 360             else
 361                 return E_OUTOFMEMORY;
 362         }
 363         return S_OK;
 364     }
 365     case JSV_NUMBER: {
 366         double n = get_number(val);
 367
 368         if(is_int32(n)) {
 369             V_VT(retv) = VT_I4;
 370             V_I4(retv) = n;
 371         }else {
 372             V_VT(retv) = VT_R8;
 373             V_R8(retv) = n;
 374         }
 375
 376         return S_OK;
 377     }
 378     case JSV_BOOL:
 379         V_VT(retv) = VT_BOOL;
 380         V_BOOL(retv) = get_bool(val) ? VARIANT_TRUE : VARIANT_FALSE;
 381         return S_OK;
 382     case JSV_VARIANT:
 383         V_VT(retv) = VT_EMPTY;
 384         return VariantCopy(retv, get_variant(val));
 385     }
 386
 387     assert(0);
 388     return E_FAIL;
 389 }
 390
 391 /* ECMA-262 3rd Edition    9.1 */
 392 HRESULT to_primitive(script_ctx_t *ctx, jsval_t val, jsval_t *ret, hint_t hint)
 393 {
 394     if(is_object_instance(val)) {
 395         jsdisp_t *jsdisp;
 396         jsval_t prim;
 397         DISPID id;
 398         HRESULT hres;
 399
 400         static const WCHAR toStringW[] = {'t','o','S','t','r','i','n','g',0};
 401         static const WCHAR valueOfW[] = {'v','a','l','u','e','O','f',0};
 402
 403         if(!get_object(val)) {
 404             *ret = jsval_null();
 405             return S_OK;
 406         }
 407
 408         jsdisp = iface_to_jsdisp((IUnknown*)get_object(val));
 409         if(!jsdisp)
 410             return disp_propget(ctx, get_object(val), DISPID_VALUE, ret);
 411
 412         if(hint == NO_HINT)
 413             hint = is_class(jsdisp, JSCLASS_DATE) ? HINT_STRING : HINT_NUMBER;
 414
 415         /* Native implementation doesn't throw TypeErrors, returns strange values */
 416
 417         hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? toStringW : valueOfW, 0, &id);
 418         if(SUCCEEDED(hres)) {
 419             hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, 0, NULL, &prim);
 420             if(FAILED(hres)) {
 421                 WARN("call error - forwarding exception\n");
 422                 jsdisp_release(jsdisp);
 423                 return hres;
 424             }else if(!is_object_instance(prim)) {
 425                 jsdisp_release(jsdisp);
 426                 *ret = prim;
 427                 return S_OK;
 428             }else {
 429                 IDispatch_Release(get_object(prim));
 430             }
 431         }
 432
 433         hres = jsdisp_get_id(jsdisp, hint == HINT_STRING ? valueOfW : toStringW, 0, &id);
 434         if(SUCCEEDED(hres)) {
 435             hres = jsdisp_call(jsdisp, id, DISPATCH_METHOD, 0, NULL, &prim);
 436             if(FAILED(hres)) {
 437                 WARN("call error - forwarding exception\n");
 438                 jsdisp_release(jsdisp);
 439                 return hres;
 440             }else if(!is_object_instance(prim)) {
 441                 jsdisp_release(jsdisp);
 442                 *ret = prim;
 443                 return S_OK;
 444             }else {
 445                 IDispatch_Release(get_object(prim));
 446             }
 447         }
 448
 449         jsdisp_release(jsdisp);
 450
 451         WARN("failed\n");
 452         return throw_type_error(ctx, JS_E_TO_PRIMITIVE, NULL);
 453     }
 454
 455     return jsval_copy(val, ret);
 456
 457 }
 458
 459 /* ECMA-262 3rd Edition    9.2 */
 460 HRESULT to_boolean(jsval_t val, BOOL *ret)
 461 {
 462     switch(jsval_type(val)) {
 463     case JSV_UNDEFINED:
 464     case JSV_NULL:
 465         *ret = FALSE;
 466         return S_OK;
 467     case JSV_OBJECT:
 468         *ret = get_object(val) != NULL;
 469         return S_OK;
 470     case JSV_STRING:
 471         *ret = jsstr_length(get_string(val)) != 0;
 472         return S_OK;
 473     case JSV_NUMBER:
 474         *ret = !isnan(get_number(val)) && get_number(val);
 475         return S_OK;
 476     case JSV_BOOL:
 477         *ret = get_bool(val);
 478         return S_OK;
 479     case JSV_VARIANT:
 480         FIXME("unimplemented for variant %s\n", debugstr_variant(get_variant(val)));
 481         return E_NOTIMPL;
 482     }
 483
 484     assert(0);
 485     return E_FAIL;
 486 }
 487
 488 static int hex_to_int(WCHAR c)
 489 {
 490     if('0' <= c && c <= '9')
 491         return c-'0';
 492
 493     if('a' <= c && c <= 'f')
 494         return c-'a'+10;
 495
 496     if('A' <= c && c <= 'F')
 497         return c-'A'+10;
 498
 499     return -1;
 500 }
 501
 502 /* ECMA-262 3rd Edition    9.3.1 */
 503 static HRESULT str_to_number(jsstr_t *str, double *ret)
 504 {
 505     const WCHAR *ptr;
 506     BOOL neg = FALSE;
 507     DOUBLE d = 0.0;
 508
 509     static const WCHAR infinityW[] = {'I','n','f','i','n','i','t','y'};
 510
 511     ptr = jsstr_flatten(str);
 512     if(!ptr)
 513         return E_OUTOFMEMORY;
 514
 515     while(isspaceW(*ptr))
 516         ptr++;
 517
 518     if(*ptr == '-') {
 519         neg = TRUE;
 520         ptr++;
 521     }else if(*ptr == '+') {
 522         ptr++;
 523     }
 524
 525     if(!strncmpW(ptr, infinityW, sizeof(infinityW)/sizeof(WCHAR))) {
 526         ptr += sizeof(infinityW)/sizeof(WCHAR);
 527         while(*ptr && isspaceW(*ptr))
 528             ptr++;
 529
 530         if(*ptr)
 531             *ret = NAN;
 532         else
 533             *ret = neg ? -INFINITY : INFINITY;
 534         return S_OK;
 535     }
 536
 537     if(*ptr == '0' && ptr[1] == 'x') {
 538         DWORD l = 0;
 539
 540         ptr += 2;
 541         while((l = hex_to_int(*ptr)) != -1) {
 542             d = d*16 + l;
 543             ptr++;
 544         }
 545
 546         *ret = d;
 547         return S_OK;
 548     }
 549
 550     while(isdigitW(*ptr))
 551         d = d*10 + (*ptr++ - '0');
 552
 553     if(*ptr == 'e' || *ptr == 'E') {
 554         BOOL eneg = FALSE;
 555         LONG l = 0;
 556
 557         ptr++;
 558         if(*ptr == '-') {
 559             ptr++;
 560             eneg = TRUE;
 561         }else if(*ptr == '+') {
 562             ptr++;
 563         }
 564
 565         while(isdigitW(*ptr))
 566             l = l*10 + (*ptr++ - '0');
 567         if(eneg)
 568             l = -l;
 569
 570         d *= pow(10, l);
 571     }else if(*ptr == '.') {
 572         DOUBLE dec = 0.1;
 573
 574         ptr++;
 575         while(isdigitW(*ptr)) {
 576             d += dec * (*ptr++ - '0');
 577             dec *= 0.1;
 578         }
 579     }
 580
 581     while(isspaceW(*ptr))
 582         ptr++;
 583
 584     if(*ptr) {
 585         *ret = NAN;
 586         return S_OK;
 587     }
 588
 589     if(neg)
 590         d = -d;
 591
 592     *ret = d;
 593     return S_OK;
 594 }
 595
 596 /* ECMA-262 3rd Edition    9.3 */
 597 HRESULT to_number(script_ctx_t *ctx, jsval_t val, double *ret)
 598 {
 599     switch(jsval_type(val)) {
 600     case JSV_UNDEFINED:
 601         *ret = NAN;
 602         return S_OK;
 603     case JSV_NULL:
 604         *ret = 0;
 605         return S_OK;
 606     case JSV_NUMBER:
 607         *ret = get_number(val);
 608         return S_OK;
 609     case JSV_STRING:
 610         return str_to_number(get_string(val), ret);
 611     case JSV_OBJECT: {
 612         jsval_t prim;
 613         HRESULT hres;
 614
 615         hres = to_primitive(ctx, val, &prim, HINT_NUMBER);
 616         if(FAILED(hres))
 617             return hres;
 618
 619         hres = to_number(ctx, prim, ret);
 620         jsval_release(prim);
 621         return hres;
 622     }
 623     case JSV_BOOL:
 624         *ret = get_bool(val) ? 1 : 0;
 625         return S_OK;
 626     case JSV_VARIANT:
 627         FIXME("unimplemented for variant %s\n", debugstr_variant(get_variant(val)));
 628         return E_NOTIMPL;
 629     };
 630
 631     assert(0);
 632     return E_FAIL;
 633 }
 634
 635 /* ECMA-262 3rd Edition    9.4 */
 636 HRESULT to_integer(script_ctx_t *ctx, jsval_t v, double *ret)
 637 {
 638     double n;
 639     HRESULT hres;
 640
 641     hres = to_number(ctx, v, &n);
 642     if(FAILED(hres))
 643         return hres;
 644
 645     if(isnan(n))
 646         *ret = 0;
 647     else
 648         *ret = n >= 0.0 ? floor(n) : -floor(-n);
 649     return S_OK;
 650 }
 651
 652 /* ECMA-262 3rd Edition    9.5 */
 653 HRESULT to_int32(script_ctx_t *ctx, jsval_t v, INT *ret)
 654 {
 655     double n;
 656     HRESULT hres;
 657
 658     hres = to_number(ctx, v, &n);
 659     if(FAILED(hres))
 660         return hres;
 661
 662     *ret = isnan(n) || isinf(n) ? 0 : n;
 663     return S_OK;
 664 }
 665
 666 /* ECMA-262 3rd Edition    9.6 */
 667 HRESULT to_uint32(script_ctx_t *ctx, jsval_t val, DWORD *ret)
 668 {
 669     INT32 n;
 670     HRESULT hres;
 671
 672     hres = to_int32(ctx, val, &n);
 673     if(SUCCEEDED(hres))
 674         *ret = n;
 675     return hres;
 676 }
 677
 678 static jsstr_t *int_to_string(int i)
 679 {
 680     WCHAR buf[12], *p;
 681     BOOL neg = FALSE;
 682
 683     if(!i) {
 684         static const WCHAR zeroW[] = {'0',0};
 685         return jsstr_alloc(zeroW);
 686     }
 687
 688     if(i < 0) {
 689         neg = TRUE;
 690         i = -i;
 691     }
 692
 693     p = buf + sizeof(buf)/sizeof(*buf)-1;
 694     *p-- = 0;
 695     while(i) {
 696         *p-- = i%10 + '0';
 697         i /= 10;
 698     }
 699
 700     if(neg)
 701         *p = '-';
 702     else
 703         p++;
 704
 705     return jsstr_alloc(p);
 706 }
 707
 708 HRESULT double_to_string(double n, jsstr_t **str)
 709 {
 710     const WCHAR InfinityW[] = {'-','I','n','f','i','n','i','t','y',0};
 711
 712     if(isnan(n)) {
 713         *str = jsstr_nan();
 714     }else if(isinf(n)) {
 715         *str = jsstr_alloc(n<0 ? InfinityW : InfinityW+1);
 716     }else if(is_int32(n)) {
 717         *str = int_to_string(n);
 718     }else {
 719         VARIANT strv, v;
 720         HRESULT hres;
 721
 722         /* FIXME: Don't use VariantChangeTypeEx */
 723         V_VT(&v) = VT_R8;
 724         V_R8(&v) = n;
 725         V_VT(&strv) = VT_EMPTY;
 726         hres = VariantChangeTypeEx(&strv, &v, MAKELCID(MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US),SORT_DEFAULT), 0, VT_BSTR);
 727         if(FAILED(hres))
 728             return hres;
 729
 730         *str = jsstr_alloc(V_BSTR(&strv));
 731         SysFreeString(V_BSTR(&strv));
 732     }
 733
 734     return *str ? S_OK : E_OUTOFMEMORY;
 735 }
 736
 737 /* ECMA-262 3rd Edition    9.8 */
 738 HRESULT to_string(script_ctx_t *ctx, jsval_t val, jsstr_t **str)
 739 {
 740     const WCHAR nullW[] = {'n','u','l','l',0};
 741     const WCHAR trueW[] = {'t','r','u','e',0};
 742     const WCHAR falseW[] = {'f','a','l','s','e',0};
 743
 744     switch(jsval_type(val)) {
 745     case JSV_UNDEFINED:
 746         *str = jsstr_undefined();
 747         return S_OK;
 748     case JSV_NULL:
 749         *str = jsstr_alloc(nullW);
 750         break;
 751     case JSV_NUMBER:
 752         return double_to_string(get_number(val), str);
 753     case JSV_STRING:
 754         *str = jsstr_addref(get_string(val));
 755         break;
 756     case JSV_OBJECT: {
 757         jsval_t prim;
 758         HRESULT hres;
 759
 760         hres = to_primitive(ctx, val, &prim, HINT_STRING);
 761         if(FAILED(hres))
 762             return hres;
 763
 764         hres = to_string(ctx, prim, str);
 765         jsval_release(prim);
 766         return hres;
 767     }
 768     case JSV_BOOL:
 769         *str = jsstr_alloc(get_bool(val) ? trueW : falseW);
 770         break;
 771     default:
 772         FIXME("unsupported %s\n", debugstr_jsval(val));
 773         return E_NOTIMPL;
 774     }
 775
 776     return *str ? S_OK : E_OUTOFMEMORY;
 777 }
 778
 779 HRESULT to_flat_string(script_ctx_t *ctx, jsval_t val, jsstr_t **str, const WCHAR **ret_str)
 780 {
 781     HRESULT hres;
 782
 783     hres = to_string(ctx, val, str);
 784     if(FAILED(hres))
 785         return hres;
 786
 787     *ret_str = jsstr_flatten(*str);
 788     if(!*ret_str) {
 789         jsstr_release(*str);
 790         return E_OUTOFMEMORY;
 791     }
 792
 793     return S_OK;
 794 }
 795
 796 /* ECMA-262 3rd Edition    9.9 */
 797 HRESULT to_object(script_ctx_t *ctx, jsval_t val, IDispatch **disp)
 798 {
 799     jsdisp_t *dispex;
 800     HRESULT hres;
 801
 802     switch(jsval_type(val)) {
 803     case JSV_STRING:
 804         hres = create_string(ctx, get_string(val), &dispex);
 805         if(FAILED(hres))
 806             return hres;
 807
 808         *disp = to_disp(dispex);
 809         break;
 810     case JSV_NUMBER:
 811         hres = create_number(ctx, get_number(val), &dispex);
 812         if(FAILED(hres))
 813             return hres;
 814
 815         *disp = to_disp(dispex);
 816         break;
 817     case JSV_OBJECT:
 818         if(get_object(val)) {
 819             *disp = get_object(val);
 820             IDispatch_AddRef(*disp);
 821         }else {
 822             jsdisp_t *obj;
 823
 824             hres = create_object(ctx, NULL, &obj);
 825             if(FAILED(hres))
 826                 return hres;
 827
 828             *disp = to_disp(obj);
 829         }
 830         break;
 831     case JSV_BOOL:
 832         hres = create_bool(ctx, get_bool(val), &dispex);
 833         if(FAILED(hres))
 834             return hres;
 835
 836         *disp = to_disp(dispex);
 837         break;
 838     case JSV_UNDEFINED:
 839     case JSV_NULL:
 840         WARN("object expected\n");
 841         return throw_type_error(ctx, JS_E_OBJECT_EXPECTED, NULL);
 842     case JSV_VARIANT:
 843         switch(V_VT(get_variant(val))) {
 844         case VT_ARRAY|VT_VARIANT:
 845             hres = create_vbarray(ctx, V_ARRAY(get_variant(val)), &dispex);
 846             if(FAILED(hres))
 847                 return hres;
 848
 849             *disp = to_disp(dispex);
 850             break;
 851
 852         default:
 853             FIXME("Unsupported %s\n", debugstr_variant(get_variant(val)));
 854             return E_NOTIMPL;
 855         }
 856         break;
 857     }
 858
 859     return S_OK;
 860 }
 861
 862 HRESULT variant_change_type(script_ctx_t *ctx, VARIANT *dst, VARIANT *src, VARTYPE vt)
 863 {
 864     jsval_t val;
 865     HRESULT hres;
 866
 867     clear_ei(ctx);
 868     hres = variant_to_jsval(src, &val);
 869     if(FAILED(hres))
 870         return hres;
 871
 872     switch(vt) {
 873     case VT_I2:
 874     case VT_I4: {
 875         INT i;
 876
 877         hres = to_int32(ctx, val, &i);
 878         if(SUCCEEDED(hres)) {
 879             if(vt == VT_I4)
 880                 V_I4(dst) = i;
 881             else
 882                 V_I2(dst) = i;
 883         }
 884         break;
 885     }
 886     case VT_R8: {
 887         double n;
 888         hres = to_number(ctx, val, &n);
 889         if(SUCCEEDED(hres))
 890             V_R8(dst) = n;
 891         break;
 892     }
 893     case VT_R4: {
 894         double n;
 895
 896         hres = to_number(ctx, val, &n);
 897         if(SUCCEEDED(hres))
 898             V_R4(dst) = n;
 899         break;
 900     }
 901     case VT_BOOL: {
 902         BOOL b;
 903
 904         hres = to_boolean(val, &b);
 905         if(SUCCEEDED(hres))
 906             V_BOOL(dst) = b ? VARIANT_TRUE : VARIANT_FALSE;
 907         break;
 908     }
 909     case VT_BSTR: {
 910         jsstr_t *str;
 911
 912         hres = to_string(ctx, val, &str);
 913         if(FAILED(hres))
 914             break;
 915
 916         if(str->length_flags & JSSTR_FLAG_NULLBSTR) {
 917             V_BSTR(dst) = NULL;
 918             break;
 919         }
 920
 921         V_BSTR(dst) = SysAllocStringLen(NULL, jsstr_length(str));
 922         if(V_BSTR(dst))
 923             jsstr_flush(str, V_BSTR(dst));
 924         else
 925             hres = E_OUTOFMEMORY;
 926         break;
 927     }
 928     case VT_EMPTY:
 929         hres = V_VT(src) == VT_EMPTY ? S_OK : E_NOTIMPL;
 930         break;
 931     case VT_NULL:
 932         hres = V_VT(src) == VT_NULL ? S_OK : E_NOTIMPL;
 933         break;
 934     default:
 935         FIXME("vt %d not implemented\n", vt);
 936         hres = E_NOTIMPL;
 937     }
 938
 939     jsval_release(val);
 940     if(FAILED(hres))
 941         return hres;
 942
 943     V_VT(dst) = vt;
 944     return S_OK;
 945 }
 946
 947 static inline JSCaller *impl_from_IServiceProvider(IServiceProvider *iface)
 948 {
 949     return CONTAINING_RECORD(iface, JSCaller, IServiceProvider_iface);
 950 }
 951
 952 static HRESULT WINAPI JSCaller_QueryInterface(IServiceProvider *iface, REFIID riid, void **ppv)
 953 {
 954     JSCaller *This = impl_from_IServiceProvider(iface);
 955
 956     if(IsEqualGUID(&IID_IUnknown, riid)) {
 957         TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv);
 958         *ppv = &This->IServiceProvider_iface;
 959     }else if(IsEqualGUID(&IID_IServiceProvider, riid)) {
 960         TRACE("(%p)->(IID_IServiceProvider %p)\n", This, ppv);
 961         *ppv = &This->IServiceProvider_iface;
 962     }else {
 963         WARN("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppv);
 964         *ppv = NULL;
 965         return E_NOINTERFACE;
 966     }
 967
 968     IUnknown_AddRef((IUnknown*)*ppv);
 969     return S_OK;
 970 }
 971
 972 static ULONG WINAPI JSCaller_AddRef(IServiceProvider *iface)
 973 {
 974     JSCaller *This = impl_from_IServiceProvider(iface);
 975     LONG ref = InterlockedIncrement(&This->ref);
 976
 977     TRACE("(%p) ref=%d\n", This, ref);
 978
 979     return ref;
 980 }
 981
 982 static ULONG WINAPI JSCaller_Release(IServiceProvider *iface)
 983 {
 984     JSCaller *This = impl_from_IServiceProvider(iface);
 985     LONG ref = InterlockedIncrement(&This->ref);
 986
 987     TRACE("(%p) ref=%d\n", This, ref);
 988
 989     if(!ref) {
 990         assert(!This->ctx);
 991         heap_free(This);
 992     }
 993
 994     return ref;
 995 }
 996
 997 static HRESULT WINAPI JSCaller_QueryService(IServiceProvider *iface, REFGUID guidService,
 998         REFIID riid, void **ppv)
 999 {
1000     JSCaller *This = impl_from_IServiceProvider(iface);
1001
1002     if(IsEqualGUID(guidService, &SID_VariantConversion) && This->ctx && This->ctx->active_script) {
1003         TRACE("(%p)->(SID_VariantConversion)\n", This);
1004         return IActiveScript_QueryInterface(This->ctx->active_script, riid, ppv);
1005     }
1006
1007     FIXME("(%p)->(%s %s %p)\n", This, debugstr_guid(guidService), debugstr_guid(riid), ppv);
1008
1009     *ppv = NULL;
1010     return E_NOINTERFACE;
1011 }
1012
1013 static const IServiceProviderVtbl ServiceProviderVtbl = {
1014     JSCaller_QueryInterface,
1015     JSCaller_AddRef,
1016     JSCaller_Release,
1017     JSCaller_QueryService
1018 };
1019
1020 HRESULT create_jscaller(script_ctx_t *ctx)
1021 {
1022     JSCaller *ret;
1023
1024     ret = heap_alloc(sizeof(*ret));
1025     if(!ret)
1026         return E_OUTOFMEMORY;
1027
1028     ret->IServiceProvider_iface.lpVtbl = &ServiceProviderVtbl;
1029     ret->ref = 1;
1030     ret->ctx = ctx;
1031
1032     ctx->jscaller = ret;
1033     return S_OK;
1034 }