dlls/jscript/function.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 <assert.h>
  20
  21 #include "jscript.h"
  22 #include "engine.h"
  23
  24 #include "wine/debug.h"
  25
  26 WINE_DEFAULT_DEBUG_CHANNEL(jscript);
  27
  28 typedef struct {
  29     jsdisp_t dispex;
  30     builtin_invoke_t value_proc;
  31     const WCHAR *name;
  32     DWORD flags;
  33     scope_chain_t *scope_chain;
  34     bytecode_t *code;
  35     function_code_t *func_code;
  36     DWORD length;
  37     jsdisp_t *arguments;
  38 } FunctionInstance;
  39
  40 static inline FunctionInstance *function_from_vdisp(vdisp_t *vdisp)
  41 {
  42     return (FunctionInstance*)vdisp->u.jsdisp;
  43 }
  44
  45 static inline FunctionInstance *function_this(vdisp_t *jsthis)
  46 {
  47     return is_vclass(jsthis, JSCLASS_FUNCTION) ? function_from_vdisp(jsthis) : NULL;
  48 }
  49
  50 static const WCHAR prototypeW[] = {'p','r','o','t','o','t', 'y', 'p','e',0};
  51
  52 static const WCHAR lengthW[] = {'l','e','n','g','t','h',0};
  53 static const WCHAR toStringW[] = {'t','o','S','t','r','i','n','g',0};
  54 static const WCHAR applyW[] = {'a','p','p','l','y',0};
  55 static const WCHAR callW[] = {'c','a','l','l',0};
  56 static const WCHAR argumentsW[] = {'a','r','g','u','m','e','n','t','s',0};
  57
  58 static HRESULT init_parameters(jsdisp_t *var_disp, FunctionInstance *function, unsigned argc, jsval_t *argv)
  59 {
  60     DWORD i=0;
  61     HRESULT hres;
  62
  63     for(i=0; i < function->func_code->param_cnt; i++) {
  64         hres = jsdisp_propput_name(var_disp, function->func_code->params[i],
  65                 i < argc ? argv[i] : jsval_undefined());
  66         if(FAILED(hres))
  67             return hres;
  68     }
  69
  70     return S_OK;
  71 }
  72
  73 static HRESULT Arguments_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
  74         jsval_t *r)
  75 {
  76     FIXME("\n");
  77     return E_NOTIMPL;
  78 }
  79
  80 static const builtin_info_t Arguments_info = {
  81     JSCLASS_ARGUMENTS,
  82     {NULL, Arguments_value, 0},
  83     0, NULL,
  84     NULL,
  85     NULL
  86 };
  87
  88 static HRESULT create_arguments(script_ctx_t *ctx, IDispatch *calee, unsigned argc, jsval_t *argv, jsdisp_t **ret)
  89 {
  90     jsdisp_t *args;
  91     DWORD i;
  92     HRESULT hres;
  93
  94     static const WCHAR caleeW[] = {'c','a','l','l','e','e',0};
  95
  96     args = heap_alloc_zero(sizeof(jsdisp_t));
  97     if(!args)
  98         return E_OUTOFMEMORY;
  99
 100     hres = init_dispex_from_constr(args, ctx, &Arguments_info, ctx->object_constr);
 101     if(FAILED(hres)) {
 102         heap_free(args);
 103         return hres;
 104     }
 105
 106     for(i=0; i < argc; i++) {
 107         hres = jsdisp_propput_idx(args, i, argv[i]);
 108         if(FAILED(hres))
 109             break;
 110     }
 111
 112     if(SUCCEEDED(hres)) {
 113         hres = jsdisp_propput_name(args, lengthW, jsval_number(argc));
 114
 115         if(SUCCEEDED(hres))
 116             hres = jsdisp_propput_name(args, caleeW, jsval_disp(calee));
 117     }
 118
 119     if(FAILED(hres)) {
 120         jsdisp_release(args);
 121         return hres;
 122     }
 123
 124     *ret = args;
 125     return S_OK;
 126 }
 127
 128 static HRESULT create_var_disp(script_ctx_t *ctx, FunctionInstance *function, jsdisp_t *arg_disp,
 129         unsigned argc, jsval_t *argv, jsdisp_t **ret)
 130 {
 131     jsdisp_t *var_disp;
 132     HRESULT hres;
 133
 134     hres = create_dispex(ctx, NULL, NULL, &var_disp);
 135     if(FAILED(hres))
 136         return hres;
 137
 138     hres = jsdisp_propput_name(var_disp, argumentsW, jsval_obj(arg_disp));
 139     if(SUCCEEDED(hres))
 140         hres = init_parameters(var_disp, function, argc, argv);
 141     if(FAILED(hres)) {
 142         jsdisp_release(var_disp);
 143         return hres;
 144     }
 145
 146     *ret = var_disp;
 147     return S_OK;
 148 }
 149
 150 static HRESULT invoke_source(script_ctx_t *ctx, FunctionInstance *function, IDispatch *this_obj, unsigned argc, jsval_t *argv,
 151         jsval_t *r)
 152 {
 153     jsdisp_t *var_disp, *arg_disp;
 154     exec_ctx_t *exec_ctx;
 155     scope_chain_t *scope;
 156     HRESULT hres;
 157
 158     if(!function->func_code) {
 159         FIXME("no source\n");
 160         return E_FAIL;
 161     }
 162
 163     hres = create_arguments(ctx, to_disp(&function->dispex), argc, argv, &arg_disp);
 164     if(FAILED(hres))
 165         return hres;
 166
 167     hres = create_var_disp(ctx, function, arg_disp, argc, argv, &var_disp);
 168     if(FAILED(hres)) {
 169         jsdisp_release(arg_disp);
 170         return hres;
 171     }
 172
 173     hres = scope_push(function->scope_chain, var_disp, to_disp(var_disp), &scope);
 174     if(SUCCEEDED(hres)) {
 175         hres = create_exec_ctx(ctx, this_obj, var_disp, scope, FALSE, &exec_ctx);
 176         scope_release(scope);
 177     }
 178     jsdisp_release(var_disp);
 179     if(SUCCEEDED(hres)) {
 180         jsdisp_t *prev_args;
 181
 182         prev_args = function->arguments;
 183         function->arguments = arg_disp;
 184         hres = exec_source(exec_ctx, function->code, function->func_code, FALSE, r);
 185         function->arguments = prev_args;
 186     }
 187
 188     jsdisp_release(arg_disp);
 189     exec_release(exec_ctx);
 190     return hres;
 191 }
 192
 193 static HRESULT invoke_constructor(script_ctx_t *ctx, FunctionInstance *function, unsigned argc, jsval_t *argv,
 194         jsval_t *r)
 195 {
 196     jsdisp_t *this_obj;
 197     jsval_t var;
 198     HRESULT hres;
 199
 200     hres = create_object(ctx, &function->dispex, &this_obj);
 201     if(FAILED(hres))
 202         return hres;
 203
 204     hres = invoke_source(ctx, function, to_disp(this_obj), argc, argv, &var);
 205     if(FAILED(hres)) {
 206         jsdisp_release(this_obj);
 207         return hres;
 208     }
 209
 210     if(is_object_instance(var)) {
 211         jsdisp_release(this_obj);
 212         *r = var;
 213     }else {
 214         jsval_release(var);
 215         *r = jsval_obj(this_obj);
 216     }
 217     return S_OK;
 218 }
 219
 220 static HRESULT invoke_value_proc(script_ctx_t *ctx, FunctionInstance *function, IDispatch *this_disp, WORD flags,
 221         unsigned argc, jsval_t *argv, jsval_t *r)
 222 {
 223     vdisp_t vthis;
 224     HRESULT hres;
 225
 226     if(this_disp)
 227         set_disp(&vthis, this_disp);
 228     else if(ctx->host_global)
 229         set_disp(&vthis, ctx->host_global);
 230     else
 231         set_jsdisp(&vthis, ctx->global);
 232
 233     hres = function->value_proc(ctx, &vthis, flags, argc, argv, r);
 234
 235     vdisp_release(&vthis);
 236     return hres;
 237 }
 238
 239 static HRESULT call_function(script_ctx_t *ctx, FunctionInstance *function, IDispatch *this_obj,
 240         unsigned argc, jsval_t *argv, jsval_t *r)
 241 {
 242     if(function->value_proc)
 243         return invoke_value_proc(ctx, function, this_obj, DISPATCH_METHOD, argc, argv, r);
 244
 245     return invoke_source(ctx, function, this_obj, argc, argv, r);
 246 }
 247
 248 static HRESULT function_to_string(FunctionInstance *function, jsstr_t **ret)
 249 {
 250     jsstr_t *str;
 251
 252     static const WCHAR native_prefixW[] = {'\n','f','u','n','c','t','i','o','n',' '};
 253     static const WCHAR native_suffixW[] =
 254         {'(',')',' ','{','\n',' ',' ',' ',' ','[','n','a','t','i','v','e',' ','c','o','d','e',']','\n','}','\n'};
 255
 256     if(function->value_proc) {
 257         DWORD name_len;
 258
 259         name_len = strlenW(function->name);
 260         str = jsstr_alloc_buf((sizeof(native_prefixW)+sizeof(native_suffixW))/sizeof(WCHAR) + name_len);
 261         if(!str)
 262             return E_OUTOFMEMORY;
 263
 264         memcpy(str->str, native_prefixW, sizeof(native_prefixW));
 265         memcpy(str->str + sizeof(native_prefixW)/sizeof(WCHAR), function->name, name_len*sizeof(WCHAR));
 266         memcpy(str->str + sizeof(native_prefixW)/sizeof(WCHAR) + name_len, native_suffixW, sizeof(native_suffixW));
 267     }else {
 268         str = jsstr_alloc_len(function->func_code->source, function->func_code->source_len);
 269         if(!str)
 270             return E_OUTOFMEMORY;
 271     }
 272
 273     *ret = str;
 274     return S_OK;
 275 }
 276
 277 HRESULT Function_invoke(jsdisp_t *func_this, IDispatch *jsthis, WORD flags, unsigned argc, jsval_t *argv, jsval_t *r)
 278 {
 279     FunctionInstance *function;
 280
 281     TRACE("func %p this %p\n", func_this, jsthis);
 282
 283     assert(is_class(func_this, JSCLASS_FUNCTION));
 284     function = (FunctionInstance*)func_this;
 285
 286     if(function->value_proc)
 287         return invoke_value_proc(function->dispex.ctx, function, jsthis, flags, argc, argv, r);
 288
 289     if(flags == DISPATCH_CONSTRUCT)
 290         return invoke_constructor(function->dispex.ctx, function, argc, argv, r);
 291
 292     assert(flags == DISPATCH_METHOD);
 293     return invoke_source(function->dispex.ctx, function, jsthis, argc, argv, r);
 294 }
 295
 296 static HRESULT Function_length(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
 297         jsval_t *r)
 298 {
 299     FunctionInstance *This = function_from_vdisp(jsthis);
 300
 301     TRACE("%p %d\n", This, This->length);
 302
 303     switch(flags) {
 304     case DISPATCH_PROPERTYGET:
 305         *r = jsval_number(This->length);
 306         break;
 307     default:
 308         FIXME("unimplemented flags %x\n", flags);
 309         return E_NOTIMPL;
 310     }
 311
 312     return S_OK;
 313 }
 314
 315 static HRESULT Function_toString(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
 316         jsval_t *r)
 317 {
 318     FunctionInstance *function;
 319     jsstr_t *str;
 320     HRESULT hres;
 321
 322     TRACE("\n");
 323
 324     if(!(function = function_this(jsthis)))
 325         return throw_type_error(ctx, JS_E_FUNCTION_EXPECTED, NULL);
 326
 327     hres = function_to_string(function, &str);
 328     if(FAILED(hres))
 329         return hres;
 330
 331     if(r)
 332         *r = jsval_string(str);
 333     else
 334         jsstr_release(str);
 335     return S_OK;
 336 }
 337
 338 static HRESULT array_to_args(script_ctx_t *ctx, jsdisp_t *arg_array, unsigned *argc, jsval_t **ret)
 339 {
 340     jsval_t *argv, val;
 341     DWORD length, i;
 342     HRESULT hres;
 343
 344     hres = jsdisp_propget_name(arg_array, lengthW, &val);
 345     if(FAILED(hres))
 346         return hres;
 347
 348     hres = to_uint32(ctx, val, &length);
 349     jsval_release(val);
 350     if(FAILED(hres))
 351         return hres;
 352
 353     argv = heap_alloc(length * sizeof(*argv));
 354     if(!argv)
 355         return E_OUTOFMEMORY;
 356
 357     for(i=0; i<length; i++) {
 358         hres = jsdisp_get_idx(arg_array, i, argv+i);
 359         if(hres == DISP_E_UNKNOWNNAME) {
 360             argv[i] = jsval_undefined();
 361         }else if(FAILED(hres)) {
 362             while(i--)
 363                 jsval_release(argv[i]);
 364             heap_free(argv);
 365             return hres;
 366         }
 367     }
 368
 369     *argc = length;
 370     *ret = argv;
 371     return S_OK;
 372 }
 373
 374 static HRESULT Function_apply(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv, jsval_t *r)
 375 {
 376     FunctionInstance *function;
 377     jsval_t *args = NULL;
 378     unsigned i, cnt = 0;
 379     IDispatch *this_obj = NULL;
 380     HRESULT hres = S_OK;
 381
 382     TRACE("\n");
 383
 384     if(!(function = function_this(jsthis)))
 385         return throw_type_error(ctx, JS_E_FUNCTION_EXPECTED, NULL);
 386
 387     if(argc) {
 388         if(!is_undefined(argv[0]) && !is_null(argv[0])) {
 389             hres = to_object(ctx, argv[0], &this_obj);
 390             if(FAILED(hres))
 391                 return hres;
 392         }
 393     }
 394
 395     if(argc >= 2) {
 396         jsdisp_t *arg_array = NULL;
 397
 398         if(is_object_instance(argv[1])) {
 399             arg_array = iface_to_jsdisp((IUnknown*)get_object(argv[1]));
 400             if(arg_array &&
 401                (!is_class(arg_array, JSCLASS_ARRAY) && !is_class(arg_array, JSCLASS_ARGUMENTS) )) {
 402                 jsdisp_release(arg_array);
 403                 arg_array = NULL;
 404             }
 405         }
 406
 407         if(arg_array) {
 408             hres = array_to_args(ctx, arg_array, &cnt, &args);
 409             jsdisp_release(arg_array);
 410         }else {
 411             FIXME("throw TypeError\n");
 412             hres = E_FAIL;
 413         }
 414     }
 415
 416     if(SUCCEEDED(hres))
 417         hres = call_function(ctx, function, this_obj, cnt, args, r);
 418
 419     if(this_obj)
 420         IDispatch_Release(this_obj);
 421     for(i=0; i < cnt; i++)
 422         jsval_release(args[i]);
 423     heap_free(args);
 424     return hres;
 425 }
 426
 427 static HRESULT Function_call(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
 428         jsval_t *r)
 429 {
 430     FunctionInstance *function;
 431     IDispatch *this_obj = NULL;
 432     unsigned cnt = 0;
 433     HRESULT hres;
 434
 435     TRACE("\n");
 436
 437     if(!(function = function_this(jsthis)))
 438         return throw_type_error(ctx, JS_E_FUNCTION_EXPECTED, NULL);
 439
 440     if(argc) {
 441         if(!is_undefined(argv[0]) && !is_null(argv[0])) {
 442             hres = to_object(ctx, argv[0], &this_obj);
 443             if(FAILED(hres))
 444                 return hres;
 445         }
 446
 447         cnt = argc-1;
 448     }
 449
 450     hres = call_function(ctx, function, this_obj, cnt, argv+1, r);
 451
 452     if(this_obj)
 453         IDispatch_Release(this_obj);
 454     return hres;
 455 }
 456
 457 HRESULT Function_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
 458         jsval_t *r)
 459 {
 460     FunctionInstance *function;
 461
 462     TRACE("\n");
 463
 464     if(!is_vclass(jsthis, JSCLASS_FUNCTION)) {
 465         ERR("dispex is not a function\n");
 466         return E_FAIL;
 467     }
 468
 469     function = (FunctionInstance*)jsthis->u.jsdisp;
 470
 471     switch(flags) {
 472     case DISPATCH_METHOD:
 473         assert(function->value_proc != NULL);
 474         return invoke_value_proc(ctx, function, NULL, flags, argc, argv, r);
 475
 476     case DISPATCH_PROPERTYGET: {
 477         HRESULT hres;
 478         jsstr_t *str;
 479
 480         hres = function_to_string(function, &str);
 481         if(FAILED(hres))
 482             return hres;
 483
 484         *r = jsval_string(str);
 485         break;
 486     }
 487
 488     case DISPATCH_CONSTRUCT:
 489         assert(function->value_proc != NULL);
 490         return invoke_value_proc(ctx, function, NULL, flags, argc, argv, r);
 491
 492     default:
 493         FIXME("not implemented flags %x\n", flags);
 494         return E_NOTIMPL;
 495     }
 496
 497     return S_OK;
 498 }
 499
 500 static HRESULT Function_arguments(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags,
 501         unsigned argc, jsval_t *argv, jsval_t *r)
 502 {
 503     FunctionInstance *function = (FunctionInstance*)jsthis->u.jsdisp;
 504     HRESULT hres = S_OK;
 505
 506     TRACE("\n");
 507
 508     switch(flags) {
 509     case DISPATCH_PROPERTYGET: {
 510         *r = function->arguments ? jsval_obj(jsdisp_addref(function->arguments)) : jsval_null();
 511         break;
 512     }
 513     case DISPATCH_PROPERTYPUT:
 514         break;
 515     default:
 516         FIXME("unimplemented flags %x\n", flags);
 517         hres = E_NOTIMPL;
 518     }
 519
 520     return hres;
 521 }
 522
 523 static void Function_destructor(jsdisp_t *dispex)
 524 {
 525     FunctionInstance *This = (FunctionInstance*)dispex;
 526
 527     if(This->code)
 528         release_bytecode(This->code);
 529     if(This->scope_chain)
 530         scope_release(This->scope_chain);
 531     heap_free(This);
 532 }
 533
 534 static const builtin_prop_t Function_props[] = {
 535     {applyW,                 Function_apply,                 PROPF_METHOD|2},
 536     {argumentsW,             Function_arguments,             0},
 537     {callW,                  Function_call,                  PROPF_METHOD|1},
 538     {lengthW,                Function_length,                0},
 539     {toStringW,              Function_toString,              PROPF_METHOD}
 540 };
 541
 542 static const builtin_info_t Function_info = {
 543     JSCLASS_FUNCTION,
 544     {NULL, Function_value, 0},
 545     sizeof(Function_props)/sizeof(*Function_props),
 546     Function_props,
 547     Function_destructor,
 548     NULL
 549 };
 550
 551 static const builtin_prop_t FunctionInst_props[] = {
 552     {argumentsW,             Function_arguments,             0},
 553     {lengthW,                Function_length,                0}
 554 };
 555
 556 static const builtin_info_t FunctionInst_info = {
 557     JSCLASS_FUNCTION,
 558     {NULL, Function_value, 0},
 559     sizeof(FunctionInst_props)/sizeof(*FunctionInst_props),
 560     FunctionInst_props,
 561     Function_destructor,
 562     NULL
 563 };
 564
 565 static HRESULT create_function(script_ctx_t *ctx, const builtin_info_t *builtin_info, DWORD flags,
 566         BOOL funcprot, jsdisp_t *prototype, FunctionInstance **ret)
 567 {
 568     FunctionInstance *function;
 569     HRESULT hres;
 570
 571     function = heap_alloc_zero(sizeof(FunctionInstance));
 572     if(!function)
 573         return E_OUTOFMEMORY;
 574
 575     if(funcprot)
 576         hres = init_dispex(&function->dispex, ctx, builtin_info, prototype);
 577     else if(builtin_info)
 578         hres = init_dispex_from_constr(&function->dispex, ctx, builtin_info, ctx->function_constr);
 579     else
 580         hres = init_dispex_from_constr(&function->dispex, ctx, &FunctionInst_info, ctx->function_constr);
 581     if(FAILED(hres)) {
 582         heap_free(function);
 583         return hres;
 584     }
 585
 586     function->flags = flags;
 587     function->length = flags & PROPF_ARGMASK;
 588
 589     *ret = function;
 590     return S_OK;
 591 }
 592
 593 static inline HRESULT set_prototype(script_ctx_t *ctx, jsdisp_t *dispex, jsdisp_t *prototype)
 594 {
 595     return jsdisp_propput_name(dispex, prototypeW, jsval_obj(prototype));
 596 }
 597
 598 HRESULT create_builtin_function(script_ctx_t *ctx, builtin_invoke_t value_proc, const WCHAR *name,
 599         const builtin_info_t *builtin_info, DWORD flags, jsdisp_t *prototype, jsdisp_t **ret)
 600 {
 601     FunctionInstance *function;
 602     HRESULT hres;
 603
 604     hres = create_function(ctx, builtin_info, flags, FALSE, NULL, &function);
 605     if(FAILED(hres))
 606         return hres;
 607
 608     if(builtin_info)
 609         hres = jsdisp_propput_const(&function->dispex, lengthW, jsval_number(function->length));
 610     if(SUCCEEDED(hres))
 611         hres = set_prototype(ctx, &function->dispex, prototype);
 612     if(FAILED(hres)) {
 613         jsdisp_release(&function->dispex);
 614         return hres;
 615     }
 616
 617     function->value_proc = value_proc;
 618     function->name = name;
 619
 620     *ret = &function->dispex;
 621     return S_OK;
 622 }
 623
 624 static HRESULT set_constructor_prop(script_ctx_t *ctx, jsdisp_t *constr, jsdisp_t *prot)
 625 {
 626     static const WCHAR constructorW[] = {'c','o','n','s','t','r','u','c','t','o','r',0};
 627
 628     return jsdisp_propput_dontenum(prot, constructorW, jsval_obj(constr));
 629 }
 630
 631 HRESULT create_builtin_constructor(script_ctx_t *ctx, builtin_invoke_t value_proc, const WCHAR *name,
 632         const builtin_info_t *builtin_info, DWORD flags, jsdisp_t *prototype, jsdisp_t **ret)
 633 {
 634     jsdisp_t *constr;
 635     HRESULT hres;
 636
 637     hres = create_builtin_function(ctx, value_proc, name, builtin_info, flags, prototype, &constr);
 638     if(FAILED(hres))
 639         return hres;
 640
 641     hres = set_constructor_prop(ctx, constr, prototype);
 642     if(FAILED(hres)) {
 643         jsdisp_release(constr);
 644         return hres;
 645     }
 646
 647     *ret = constr;
 648     return S_OK;
 649 }
 650
 651 HRESULT create_source_function(script_ctx_t *ctx, bytecode_t *code, function_code_t *func_code,
 652         scope_chain_t *scope_chain, jsdisp_t **ret)
 653 {
 654     FunctionInstance *function;
 655     jsdisp_t *prototype;
 656     HRESULT hres;
 657
 658     hres = create_object(ctx, NULL, &prototype);
 659     if(FAILED(hres))
 660         return hres;
 661
 662     hres = create_function(ctx, NULL, PROPF_CONSTR, FALSE, NULL, &function);
 663     if(SUCCEEDED(hres)) {
 664         hres = set_prototype(ctx, &function->dispex, prototype);
 665         if(SUCCEEDED(hres))
 666             hres = set_constructor_prop(ctx, &function->dispex, prototype);
 667         if(FAILED(hres))
 668             jsdisp_release(&function->dispex);
 669     }
 670     jsdisp_release(prototype);
 671     if(FAILED(hres))
 672         return hres;
 673
 674     if(scope_chain) {
 675         scope_addref(scope_chain);
 676         function->scope_chain = scope_chain;
 677     }
 678
 679     bytecode_addref(code);
 680     function->code = code;
 681     function->func_code = func_code;
 682     function->length = function->func_code->param_cnt;
 683
 684     *ret = &function->dispex;
 685     return S_OK;
 686 }
 687
 688 static HRESULT construct_function(script_ctx_t *ctx, unsigned argc, jsval_t *argv, IDispatch **ret)
 689 {
 690     WCHAR *str = NULL, *ptr;
 691     DWORD len = 0, l;
 692     bytecode_t *code;
 693     jsdisp_t *function;
 694     jsstr_t **params = NULL;
 695     int i=0, j=0;
 696     HRESULT hres = S_OK;
 697
 698     static const WCHAR function_anonymousW[] = {'f','u','n','c','t','i','o','n',' ','a','n','o','n','y','m','o','u','s','('};
 699     static const WCHAR function_beginW[] = {')',' ','{','\n'};
 700     static const WCHAR function_endW[] = {'\n','}',0};
 701
 702     if(argc) {
 703         params = heap_alloc(argc*sizeof(*params));
 704         if(!params)
 705             return E_OUTOFMEMORY;
 706
 707         if(argc > 2)
 708             len = (argc-2)*2; /* separating commas */
 709         for(i=0; i < argc; i++) {
 710             hres = to_string(ctx, argv[i], params+i);
 711             if(FAILED(hres))
 712                 break;
 713             len += jsstr_length(params[i]);
 714         }
 715     }
 716
 717     if(SUCCEEDED(hres)) {
 718         len += (sizeof(function_anonymousW) + sizeof(function_beginW) + sizeof(function_endW)) / sizeof(WCHAR);
 719         str = heap_alloc(len*sizeof(WCHAR));
 720         if(str) {
 721             memcpy(str, function_anonymousW, sizeof(function_anonymousW));
 722             ptr = str + sizeof(function_anonymousW)/sizeof(WCHAR);
 723             if(argc > 1) {
 724                 while(1) {
 725                     l = jsstr_length(params[j]);
 726                     memcpy(ptr, params[j]->str, l*sizeof(WCHAR));
 727                     ptr += l;
 728                     if(++j == argc-1)
 729                         break;
 730                     *ptr++ = ',';
 731                     *ptr++ = ' ';
 732                 }
 733             }
 734             memcpy(ptr, function_beginW, sizeof(function_beginW));
 735             ptr += sizeof(function_beginW)/sizeof(WCHAR);
 736             if(argc) {
 737                 l = jsstr_length(params[argc-1]);
 738                 memcpy(ptr, params[argc-1]->str, l*sizeof(WCHAR));
 739                 ptr += l;
 740             }
 741             memcpy(ptr, function_endW, sizeof(function_endW));
 742
 743             TRACE("%s\n", debugstr_w(str));
 744         }else {
 745             hres = E_OUTOFMEMORY;
 746         }
 747     }
 748
 749     while(--i >= 0)
 750         jsstr_release(params[i]);
 751     heap_free(params);
 752     if(FAILED(hres))
 753         return hres;
 754
 755     hres = compile_script(ctx, str, NULL, NULL, FALSE, FALSE, &code);
 756     heap_free(str);
 757     if(FAILED(hres))
 758         return hres;
 759
 760     if(code->global_code.func_cnt != 1 || code->global_code.var_cnt) {
 761         ERR("Invalid parser result!\n");
 762         release_bytecode(code);
 763         return E_UNEXPECTED;
 764     }
 765
 766     hres = create_source_function(ctx, code, code->global_code.funcs, NULL, &function);
 767     release_bytecode(code);
 768     if(FAILED(hres))
 769         return hres;
 770
 771     *ret = to_disp(function);
 772     return S_OK;
 773 }
 774
 775 static HRESULT FunctionConstr_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
 776         jsval_t *r)
 777 {
 778     HRESULT hres;
 779
 780     TRACE("\n");
 781
 782     switch(flags) {
 783     case DISPATCH_CONSTRUCT: {
 784         IDispatch *ret;
 785
 786         hres = construct_function(ctx, argc, argv, &ret);
 787         if(FAILED(hres))
 788             return hres;
 789
 790         *r = jsval_disp(ret);
 791         break;
 792     }
 793     default:
 794         FIXME("unimplemented flags %x\n", flags);
 795         return E_NOTIMPL;
 796     }
 797
 798     return S_OK;
 799 }
 800
 801 static HRESULT FunctionProt_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
 802         jsval_t *r)
 803 {
 804     FIXME("\n");
 805     return E_NOTIMPL;
 806 }
 807
 808 HRESULT init_function_constr(script_ctx_t *ctx, jsdisp_t *object_prototype)
 809 {
 810     FunctionInstance *prot, *constr;
 811     HRESULT hres;
 812
 813     static const WCHAR FunctionW[] = {'F','u','n','c','t','i','o','n',0};
 814
 815     hres = create_function(ctx, &Function_info, PROPF_CONSTR, TRUE, object_prototype, &prot);
 816     if(FAILED(hres))
 817         return hres;
 818
 819     prot->value_proc = FunctionProt_value;
 820     prot->name = prototypeW;
 821
 822     hres = create_function(ctx, &FunctionInst_info, PROPF_CONSTR|1, TRUE, &prot->dispex, &constr);
 823     if(SUCCEEDED(hres)) {
 824         constr->value_proc = FunctionConstr_value;
 825         constr->name = FunctionW;
 826         hres = set_prototype(ctx, &constr->dispex, &prot->dispex);
 827         if(SUCCEEDED(hres))
 828             hres = set_constructor_prop(ctx, &constr->dispex, &prot->dispex);
 829         if(FAILED(hres))
 830             jsdisp_release(&constr->dispex);
 831     }
 832     jsdisp_release(&prot->dispex);
 833     if(FAILED(hres))
 834         return hres;
 835
 836     ctx->function_constr = &constr->dispex;
 837     return S_OK;
 838 }