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 "jscript.h"
  20 #include "engine.h"
  21
  22 #include "wine/debug.h"
  23
  24 WINE_DEFAULT_DEBUG_CHANNEL(jscript);
  25
  26 typedef struct {
  27     jsdisp_t dispex;
  28     builtin_invoke_t value_proc;
  29     const WCHAR *name;
  30     DWORD flags;
  31     source_elements_t *source;
  32     parameter_t *parameters;
  33     scope_chain_t *scope_chain;
  34     parser_ctx_t *parser;
  35     const WCHAR *src_str;
  36     DWORD src_len;
  37     DWORD length;
  38     jsdisp_t *arguments;
  39 } FunctionInstance;
  40
  41 static inline FunctionInstance *function_from_vdisp(vdisp_t *vdisp)
  42 {
  43     return (FunctionInstance*)vdisp->u.jsdisp;
  44 }
  45
  46 static inline FunctionInstance *function_this(vdisp_t *jsthis)
  47 {
  48     return is_vclass(jsthis, JSCLASS_FUNCTION) ? function_from_vdisp(jsthis) : NULL;
  49 }
  50
  51 static const WCHAR prototypeW[] = {'p','r','o','t','o','t', 'y', 'p','e',0};
  52
  53 static const WCHAR lengthW[] = {'l','e','n','g','t','h',0};
  54 static const WCHAR toStringW[] = {'t','o','S','t','r','i','n','g',0};
  55 static const WCHAR applyW[] = {'a','p','p','l','y',0};
  56 static const WCHAR callW[] = {'c','a','l','l',0};
  57 static const WCHAR argumentsW[] = {'a','r','g','u','m','e','n','t','s',0};
  58
  59 static IDispatch *get_this(DISPPARAMS *dp)
  60 {
  61     DWORD i;
  62
  63     for(i=0; i < dp->cNamedArgs; i++) {
  64         if(dp->rgdispidNamedArgs[i] == DISPID_THIS) {
  65             if(V_VT(dp->rgvarg+i) == VT_DISPATCH)
  66                 return V_DISPATCH(dp->rgvarg+i);
  67
  68             WARN("This is not VT_DISPATCH\n");
  69             return NULL;
  70         }
  71     }
  72
  73     TRACE("no this passed\n");
  74     return NULL;
  75 }
  76
  77 static HRESULT init_parameters(jsdisp_t *var_disp, FunctionInstance *function, DISPPARAMS *dp,
  78         jsexcept_t *ei, IServiceProvider *caller)
  79 {
  80     parameter_t *param;
  81     VARIANT var_empty;
  82     DWORD cargs, i=0;
  83     HRESULT hres;
  84
  85     V_VT(&var_empty) = VT_EMPTY;
  86     cargs = arg_cnt(dp);
  87
  88     for(param = function->parameters; param; param = param->next) {
  89         hres = jsdisp_propput_name(var_disp, param->identifier,
  90                 i < cargs ? get_arg(dp,i) : &var_empty, ei, caller);
  91         if(FAILED(hres))
  92             return hres;
  93
  94         i++;
  95     }
  96
  97     return S_OK;
  98 }
  99
 100 static HRESULT Arguments_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 101         VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
 102 {
 103     FIXME("\n");
 104     return E_NOTIMPL;
 105 }
 106
 107 static const builtin_info_t Arguments_info = {
 108     JSCLASS_ARGUMENTS,
 109     {NULL, Arguments_value, 0},
 110     0, NULL,
 111     NULL,
 112     NULL
 113 };
 114
 115 static HRESULT create_arguments(script_ctx_t *ctx, IDispatch *calee, DISPPARAMS *dp,
 116         jsexcept_t *ei, IServiceProvider *caller, jsdisp_t **ret)
 117 {
 118     jsdisp_t *args;
 119     VARIANT var;
 120     DWORD i;
 121     HRESULT hres;
 122
 123     static const WCHAR caleeW[] = {'c','a','l','l','e','e',0};
 124
 125     args = heap_alloc_zero(sizeof(jsdisp_t));
 126     if(!args)
 127         return E_OUTOFMEMORY;
 128
 129     hres = init_dispex_from_constr(args, ctx, &Arguments_info, ctx->object_constr);
 130     if(FAILED(hres)) {
 131         heap_free(args);
 132         return hres;
 133     }
 134
 135     for(i=0; i < arg_cnt(dp); i++) {
 136         hres = jsdisp_propput_idx(args, i, get_arg(dp,i), ei, caller);
 137         if(FAILED(hres))
 138             break;
 139     }
 140
 141     if(SUCCEEDED(hres)) {
 142         V_VT(&var) = VT_I4;
 143         V_I4(&var) = arg_cnt(dp);
 144         hres = jsdisp_propput_name(args, lengthW, &var, ei, caller);
 145
 146         if(SUCCEEDED(hres)) {
 147             V_VT(&var) = VT_DISPATCH;
 148             V_DISPATCH(&var) = calee;
 149             hres = jsdisp_propput_name(args, caleeW, &var, ei, caller);
 150         }
 151     }
 152
 153     if(FAILED(hres)) {
 154         jsdisp_release(args);
 155         return hres;
 156     }
 157
 158     *ret = args;
 159     return S_OK;
 160 }
 161
 162 static HRESULT create_var_disp(script_ctx_t *ctx, FunctionInstance *function, jsdisp_t *arg_disp,
 163         DISPPARAMS *dp, jsexcept_t *ei, IServiceProvider *caller, jsdisp_t **ret)
 164 {
 165     jsdisp_t *var_disp;
 166     VARIANT var;
 167     HRESULT hres;
 168
 169     hres = create_dispex(ctx, NULL, NULL, &var_disp);
 170     if(FAILED(hres))
 171         return hres;
 172
 173     var_set_jsdisp(&var, arg_disp);
 174     hres = jsdisp_propput_name(var_disp, argumentsW, &var, ei, caller);
 175     if(SUCCEEDED(hres))
 176         hres = init_parameters(var_disp, function, dp, ei, caller);
 177     if(FAILED(hres)) {
 178         jsdisp_release(var_disp);
 179         return hres;
 180     }
 181
 182     *ret = var_disp;
 183     return S_OK;
 184 }
 185
 186 static HRESULT invoke_source(script_ctx_t *ctx, FunctionInstance *function, IDispatch *this_obj, DISPPARAMS *dp,
 187         VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
 188 {
 189     jsdisp_t *var_disp, *arg_disp;
 190     exec_ctx_t *exec_ctx;
 191     scope_chain_t *scope;
 192     HRESULT hres;
 193
 194     if(!function->source) {
 195         FIXME("no source\n");
 196         return E_FAIL;
 197     }
 198
 199     hres = create_arguments(ctx, to_disp(&function->dispex),
 200             dp, ei, caller, &arg_disp);
 201     if(FAILED(hres))
 202         return hres;
 203
 204     hres = create_var_disp(ctx, function, arg_disp, dp, ei, caller, &var_disp);
 205     if(FAILED(hres)) {
 206         jsdisp_release(arg_disp);
 207         return hres;
 208     }
 209
 210     hres = scope_push(function->scope_chain, var_disp, &scope);
 211     if(SUCCEEDED(hres)) {
 212         hres = create_exec_ctx(ctx, this_obj, var_disp, scope, FALSE, &exec_ctx);
 213         scope_release(scope);
 214     }
 215     jsdisp_release(var_disp);
 216     if(SUCCEEDED(hres)) {
 217         jsdisp_t *prev_args;
 218
 219         prev_args = function->arguments;
 220         function->arguments = arg_disp;
 221         hres = exec_source(exec_ctx, function->parser, function->source, FALSE, ei, retv);
 222         function->arguments = prev_args;
 223
 224         jsdisp_release(arg_disp);
 225         exec_release(exec_ctx);
 226     }
 227
 228     return hres;
 229 }
 230
 231 static HRESULT invoke_constructor(script_ctx_t *ctx, FunctionInstance *function, DISPPARAMS *dp,
 232         VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
 233 {
 234     jsdisp_t *this_obj;
 235     VARIANT var;
 236     HRESULT hres;
 237
 238     hres = create_object(ctx, &function->dispex, &this_obj);
 239     if(FAILED(hres))
 240         return hres;
 241
 242     hres = invoke_source(ctx, function, to_disp(this_obj), dp, &var, ei, caller);
 243     if(FAILED(hres)) {
 244         jsdisp_release(this_obj);
 245         return hres;
 246     }
 247
 248     if(V_VT(&var) == VT_DISPATCH) {
 249         jsdisp_release(this_obj);
 250         V_VT(retv) = VT_DISPATCH;
 251         V_DISPATCH(retv) = V_DISPATCH(&var);
 252     }else {
 253         VariantClear(&var);
 254         var_set_jsdisp(retv, this_obj);
 255     }
 256     return S_OK;
 257 }
 258
 259 static HRESULT invoke_value_proc(script_ctx_t *ctx, FunctionInstance *function, IDispatch *this_disp, WORD flags, DISPPARAMS *dp,
 260         VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
 261 {
 262     vdisp_t vthis;
 263     HRESULT hres;
 264
 265     if(this_disp)
 266         set_disp(&vthis, this_disp);
 267     else if(ctx->host_global)
 268         set_disp(&vthis, ctx->host_global);
 269     else
 270         set_jsdisp(&vthis, ctx->global);
 271
 272     hres = function->value_proc(ctx, &vthis, flags, dp, retv, ei, caller);
 273
 274     vdisp_release(&vthis);
 275     return hres;
 276 }
 277
 278 static HRESULT call_function(script_ctx_t *ctx, FunctionInstance *function, IDispatch *this_obj, DISPPARAMS *args,
 279         VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
 280 {
 281     if(function->value_proc)
 282         return invoke_value_proc(ctx, function, this_obj, DISPATCH_METHOD, args, retv, ei, caller);
 283
 284     return invoke_source(ctx, function, this_obj, args, retv, ei, caller);
 285 }
 286
 287 static HRESULT function_to_string(FunctionInstance *function, BSTR *ret)
 288 {
 289     BSTR str;
 290
 291     static const WCHAR native_prefixW[] = {'\n','f','u','n','c','t','i','o','n',' '};
 292     static const WCHAR native_suffixW[] =
 293         {'(',')',' ','{','\n',' ',' ',' ',' ','[','n','a','t','i','v','e',' ','c','o','d','e',']','\n','}','\n'};
 294
 295     if(function->value_proc) {
 296         DWORD name_len;
 297
 298         name_len = strlenW(function->name);
 299         str = SysAllocStringLen(NULL, sizeof(native_prefixW) + name_len*sizeof(WCHAR) + sizeof(native_suffixW));
 300         if(!str)
 301             return E_OUTOFMEMORY;
 302
 303         memcpy(str, native_prefixW, sizeof(native_prefixW));
 304         memcpy(str + sizeof(native_prefixW)/sizeof(WCHAR), function->name, name_len*sizeof(WCHAR));
 305         memcpy(str + sizeof(native_prefixW)/sizeof(WCHAR) + name_len, native_suffixW, sizeof(native_suffixW));
 306     }else {
 307         str = SysAllocStringLen(function->src_str, function->src_len);
 308         if(!str)
 309             return E_OUTOFMEMORY;
 310     }
 311
 312     *ret = str;
 313     return S_OK;
 314 }
 315
 316 static HRESULT Function_length(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 317         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 318 {
 319     FunctionInstance *This = function_from_vdisp(jsthis);
 320
 321     TRACE("%p %d\n", This, This->length);
 322
 323     switch(flags) {
 324     case DISPATCH_PROPERTYGET:
 325         V_VT(retv) = VT_I4;
 326         V_I4(retv) = This->length;
 327         break;
 328     default:
 329         FIXME("unimplemented flags %x\n", flags);
 330         return E_NOTIMPL;
 331     }
 332
 333     return S_OK;
 334 }
 335
 336 static HRESULT Function_toString(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 337         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 338 {
 339     FunctionInstance *function;
 340     BSTR str;
 341     HRESULT hres;
 342
 343     TRACE("\n");
 344
 345     if(!(function = function_this(jsthis)))
 346         return throw_type_error(ctx, ei, JS_E_FUNCTION_EXPECTED, NULL);
 347
 348     hres = function_to_string(function, &str);
 349     if(FAILED(hres))
 350         return hres;
 351
 352     if(retv) {
 353         V_VT(retv) = VT_BSTR;
 354         V_BSTR(retv) = str;
 355     }else {
 356         SysFreeString(str);
 357     }
 358     return S_OK;
 359 }
 360
 361 static HRESULT array_to_args(script_ctx_t *ctx, jsdisp_t *arg_array, jsexcept_t *ei, IServiceProvider *caller,
 362         DISPPARAMS *args)
 363 {
 364     VARIANT var, *argv;
 365     DWORD length, i;
 366     HRESULT hres;
 367
 368     hres = jsdisp_propget_name(arg_array, lengthW, &var, ei, NULL/*FIXME*/);
 369     if(FAILED(hres))
 370         return hres;
 371
 372     hres = to_uint32(ctx, &var, ei, &length);
 373     VariantClear(&var);
 374     if(FAILED(hres))
 375         return hres;
 376
 377     argv = heap_alloc(length * sizeof(VARIANT));
 378     if(!argv)
 379         return E_OUTOFMEMORY;
 380
 381     for(i=0; i<length; i++) {
 382         hres = jsdisp_get_idx(arg_array, i, argv+i, ei, caller);
 383         if(hres == DISP_E_UNKNOWNNAME)
 384             V_VT(argv+i) = VT_EMPTY;
 385         else if(FAILED(hres)) {
 386             while(i--)
 387                 VariantClear(argv+i);
 388             heap_free(argv);
 389             return hres;
 390         }
 391     }
 392
 393     args->cArgs = length;
 394     args->rgvarg = argv;
 395     return S_OK;
 396 }
 397
 398 static HRESULT Function_apply(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 399         VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
 400 {
 401     FunctionInstance *function;
 402     DISPPARAMS args = {NULL,NULL,0,0};
 403     DWORD argc, i;
 404     IDispatch *this_obj = NULL;
 405     HRESULT hres = S_OK;
 406
 407     TRACE("\n");
 408
 409     if(!(function = function_this(jsthis)))
 410         return throw_type_error(ctx, ei, JS_E_FUNCTION_EXPECTED, NULL);
 411
 412     argc = arg_cnt(dp);
 413     if(argc) {
 414         VARIANT *v = get_arg(dp,0);
 415
 416         if(V_VT(v) != VT_EMPTY && V_VT(v) != VT_NULL) {
 417             hres = to_object(ctx, v, &this_obj);
 418             if(FAILED(hres))
 419                 return hres;
 420         }
 421     }
 422
 423     if(argc >= 2) {
 424         jsdisp_t *arg_array = NULL;
 425
 426         if(V_VT(get_arg(dp,1)) == VT_DISPATCH) {
 427             arg_array = iface_to_jsdisp((IUnknown*)V_DISPATCH(get_arg(dp,1)));
 428             if(arg_array &&
 429                (!is_class(arg_array, JSCLASS_ARRAY) && !is_class(arg_array, JSCLASS_ARGUMENTS) )) {
 430                 jsdisp_release(arg_array);
 431                 arg_array = NULL;
 432             }
 433         }
 434
 435         if(arg_array) {
 436             hres = array_to_args(ctx, arg_array, ei, caller, &args);
 437             jsdisp_release(arg_array);
 438         }else {
 439             FIXME("throw TypeError\n");
 440             hres = E_FAIL;
 441         }
 442     }
 443
 444     hres = call_function(ctx, function, this_obj, &args, retv, ei, caller);
 445
 446     if(this_obj)
 447         IDispatch_Release(this_obj);
 448     for(i=0; i<args.cArgs; i++)
 449         VariantClear(args.rgvarg+i);
 450     heap_free(args.rgvarg);
 451     return hres;
 452 }
 453
 454 static HRESULT Function_call(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 455         VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
 456 {
 457     FunctionInstance *function;
 458     DISPPARAMS args = {NULL,NULL,0,0};
 459     IDispatch *this_obj = NULL;
 460     DWORD argc;
 461     HRESULT hres;
 462
 463     TRACE("\n");
 464
 465     if(!(function = function_this(jsthis)))
 466         return throw_type_error(ctx, ei, JS_E_FUNCTION_EXPECTED, NULL);
 467
 468     argc = arg_cnt(dp);
 469     if(argc) {
 470         VARIANT *v = get_arg(dp,0);
 471
 472         if(V_VT(v) != VT_EMPTY && V_VT(v) != VT_NULL) {
 473             hres = to_object(ctx, v, &this_obj);
 474             if(FAILED(hres))
 475                 return hres;
 476         }
 477
 478         args.cArgs = argc-1;
 479     }
 480
 481     if(args.cArgs)
 482         args.rgvarg = dp->rgvarg + dp->cArgs - args.cArgs-1;
 483
 484     hres = call_function(ctx, function, this_obj, &args, retv, ei, caller);
 485
 486     if(this_obj)
 487         IDispatch_Release(this_obj);
 488     return hres;
 489 }
 490
 491 HRESULT Function_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 492         VARIANT *retv, jsexcept_t *ei, IServiceProvider *caller)
 493 {
 494     FunctionInstance *function;
 495
 496     TRACE("\n");
 497
 498     if(!is_vclass(jsthis, JSCLASS_FUNCTION)) {
 499         ERR("dispex is not a function\n");
 500         return E_FAIL;
 501     }
 502
 503     function = (FunctionInstance*)jsthis->u.jsdisp;
 504
 505     switch(flags) {
 506     case DISPATCH_METHOD:
 507         if(function->value_proc)
 508             return invoke_value_proc(ctx, function, get_this(dp), flags, dp, retv, ei, caller);
 509
 510         return invoke_source(ctx, function, get_this(dp), dp, retv, ei, caller);
 511
 512     case DISPATCH_PROPERTYGET: {
 513         HRESULT hres;
 514         BSTR str;
 515
 516         hres = function_to_string(function, &str);
 517         if(FAILED(hres))
 518             return hres;
 519
 520         V_VT(retv) = VT_BSTR;
 521         V_BSTR(retv) = str;
 522         break;
 523     }
 524
 525     case DISPATCH_CONSTRUCT:
 526         if(function->value_proc)
 527             return invoke_value_proc(ctx, function, get_this(dp), flags, dp, retv, ei, caller);
 528
 529         return invoke_constructor(ctx, function, dp, retv, ei, caller);
 530
 531     default:
 532         FIXME("not implemented flags %x\n", flags);
 533         return E_NOTIMPL;
 534     }
 535
 536     return S_OK;
 537 }
 538
 539 static HRESULT Function_arguments(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags,
 540         DISPPARAMS *dp, VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 541 {
 542     FunctionInstance *function = (FunctionInstance*)jsthis->u.jsdisp;
 543     HRESULT hres = S_OK;
 544
 545     TRACE("\n");
 546
 547     switch(flags) {
 548     case DISPATCH_PROPERTYGET: {
 549         if(function->arguments) {
 550             jsdisp_addref(function->arguments);
 551             var_set_jsdisp(retv, function->arguments);
 552         }else {
 553             V_VT(retv) = VT_NULL;
 554         }
 555         break;
 556     }
 557     case DISPATCH_PROPERTYPUT:
 558         break;
 559     default:
 560         FIXME("unimplemented flags %x\n", flags);
 561         hres = E_NOTIMPL;
 562     }
 563
 564     return hres;
 565 }
 566
 567 static void Function_destructor(jsdisp_t *dispex)
 568 {
 569     FunctionInstance *This = (FunctionInstance*)dispex;
 570
 571     if(This->parser)
 572         parser_release(This->parser);
 573     if(This->scope_chain)
 574         scope_release(This->scope_chain);
 575     heap_free(This);
 576 }
 577
 578 static const builtin_prop_t Function_props[] = {
 579     {applyW,                 Function_apply,                 PROPF_METHOD|2},
 580     {argumentsW,             Function_arguments,             0},
 581     {callW,                  Function_call,                  PROPF_METHOD|1},
 582     {lengthW,                Function_length,                0},
 583     {toStringW,              Function_toString,              PROPF_METHOD}
 584 };
 585
 586 static const builtin_info_t Function_info = {
 587     JSCLASS_FUNCTION,
 588     {NULL, Function_value, 0},
 589     sizeof(Function_props)/sizeof(*Function_props),
 590     Function_props,
 591     Function_destructor,
 592     NULL
 593 };
 594
 595 static HRESULT create_function(script_ctx_t *ctx, const builtin_info_t *builtin_info, DWORD flags,
 596         BOOL funcprot, jsdisp_t *prototype, FunctionInstance **ret)
 597 {
 598     FunctionInstance *function;
 599     HRESULT hres;
 600
 601     function = heap_alloc_zero(sizeof(FunctionInstance));
 602     if(!function)
 603         return E_OUTOFMEMORY;
 604
 605     if(funcprot)
 606         hres = init_dispex(&function->dispex, ctx, &Function_info, prototype);
 607     else if(builtin_info)
 608         hres = init_dispex_from_constr(&function->dispex, ctx, builtin_info, ctx->function_constr);
 609     else
 610         hres = init_dispex_from_constr(&function->dispex, ctx, &Function_info, ctx->function_constr);
 611     if(FAILED(hres))
 612         return hres;
 613
 614     function->flags = flags;
 615     function->length = flags & PROPF_ARGMASK;
 616
 617     *ret = function;
 618     return S_OK;
 619 }
 620
 621 static HRESULT set_prototype(script_ctx_t *ctx, jsdisp_t *dispex, jsdisp_t *prototype)
 622 {
 623     jsexcept_t jsexcept;
 624     VARIANT var;
 625
 626     var_set_jsdisp(&var, prototype);
 627     memset(&jsexcept, 0, sizeof(jsexcept));
 628
 629     return jsdisp_propput_name(dispex, prototypeW, &var, &jsexcept, NULL/*FIXME*/);
 630 }
 631
 632 HRESULT create_builtin_function(script_ctx_t *ctx, builtin_invoke_t value_proc, const WCHAR *name,
 633         const builtin_info_t *builtin_info, DWORD flags, jsdisp_t *prototype, jsdisp_t **ret)
 634 {
 635     FunctionInstance *function;
 636     HRESULT hres;
 637
 638     hres = create_function(ctx, builtin_info, flags, FALSE, NULL, &function);
 639     if(FAILED(hres))
 640         return hres;
 641
 642     if(builtin_info) {
 643         VARIANT var;
 644
 645         V_VT(&var) = VT_I4;
 646         V_I4(&var) = function->length;
 647         hres = jsdisp_propput_const(&function->dispex, lengthW, &var);
 648     }
 649
 650     if(SUCCEEDED(hres))
 651         hres = set_prototype(ctx, &function->dispex, prototype);
 652     if(FAILED(hres)) {
 653         jsdisp_release(&function->dispex);
 654         return hres;
 655     }
 656
 657     function->value_proc = value_proc;
 658     function->name = name;
 659
 660     *ret = &function->dispex;
 661     return S_OK;
 662 }
 663
 664 HRESULT create_source_function(parser_ctx_t *ctx, parameter_t *parameters, source_elements_t *source,
 665         scope_chain_t *scope_chain, const WCHAR *src_str, DWORD src_len, jsdisp_t **ret)
 666 {
 667     FunctionInstance *function;
 668     jsdisp_t *prototype;
 669     parameter_t *iter;
 670     DWORD length = 0;
 671     HRESULT hres;
 672
 673     hres = create_object(ctx->script, NULL, &prototype);
 674     if(FAILED(hres))
 675         return hres;
 676
 677     hres = create_function(ctx->script, NULL, PROPF_CONSTR, FALSE, NULL, &function);
 678     if(SUCCEEDED(hres)) {
 679         hres = set_prototype(ctx->script, &function->dispex, prototype);
 680         if(FAILED(hres))
 681             jsdisp_release(&function->dispex);
 682     }
 683     jsdisp_release(prototype);
 684     if(FAILED(hres))
 685         return hres;
 686
 687     function->source = source;
 688     function->parameters = parameters;
 689
 690     if(scope_chain) {
 691         scope_addref(scope_chain);
 692         function->scope_chain = scope_chain;
 693     }
 694
 695     parser_addref(ctx);
 696     function->parser = ctx;
 697
 698     for(iter = parameters; iter; iter = iter->next)
 699         length++;
 700     function->length = length;
 701
 702     function->src_str = src_str;
 703     function->src_len = src_len;
 704
 705     *ret = &function->dispex;
 706     return S_OK;
 707 }
 708
 709 static HRESULT construct_function(script_ctx_t *ctx, DISPPARAMS *dp, jsexcept_t *ei, IDispatch **ret)
 710 {
 711     function_expression_t *expr;
 712     WCHAR *str = NULL, *ptr;
 713     DWORD argc, len = 0, l;
 714     parser_ctx_t *parser;
 715     jsdisp_t *function;
 716     BSTR *params = NULL;
 717     int i=0, j=0;
 718     HRESULT hres = S_OK;
 719
 720     static const WCHAR function_anonymousW[] = {'f','u','n','c','t','i','o','n',' ','a','n','o','n','y','m','o','u','s','('};
 721     static const WCHAR function_beginW[] = {')',' ','{','\n'};
 722     static const WCHAR function_endW[] = {'\n','}',0};
 723
 724     argc = arg_cnt(dp);
 725     if(argc) {
 726         params = heap_alloc(argc*sizeof(BSTR));
 727         if(!params)
 728             return E_OUTOFMEMORY;
 729
 730         if(argc > 2)
 731             len = (argc-2)*2; /* separating commas */
 732         for(i=0; i < argc; i++) {
 733             hres = to_string(ctx, get_arg(dp,i), ei, params+i);
 734             if(FAILED(hres))
 735                 break;
 736             len += SysStringLen(params[i]);
 737         }
 738     }
 739
 740     if(SUCCEEDED(hres)) {
 741         len += (sizeof(function_anonymousW) + sizeof(function_beginW) + sizeof(function_endW)) / sizeof(WCHAR);
 742         str = heap_alloc(len*sizeof(WCHAR));
 743         if(str) {
 744             memcpy(str, function_anonymousW, sizeof(function_anonymousW));
 745             ptr = str + sizeof(function_anonymousW)/sizeof(WCHAR);
 746             if(argc > 1) {
 747                 while(1) {
 748                     l = SysStringLen(params[j]);
 749                     memcpy(ptr, params[j], l*sizeof(WCHAR));
 750                     ptr += l;
 751                     if(++j == argc-1)
 752                         break;
 753                     *ptr++ = ',';
 754                     *ptr++ = ' ';
 755                 }
 756             }
 757             memcpy(ptr, function_beginW, sizeof(function_beginW));
 758             ptr += sizeof(function_beginW)/sizeof(WCHAR);
 759             if(argc) {
 760                 l = SysStringLen(params[argc-1]);
 761                 memcpy(ptr, params[argc-1], l*sizeof(WCHAR));
 762                 ptr += l;
 763             }
 764             memcpy(ptr, function_endW, sizeof(function_endW));
 765
 766             TRACE("%s\n", debugstr_w(str));
 767         }else {
 768             hres = E_OUTOFMEMORY;
 769         }
 770     }
 771
 772     while(--i >= 0)
 773         SysFreeString(params[i]);
 774     heap_free(params);
 775     if(FAILED(hres))
 776         return hres;
 777
 778     hres = script_parse(ctx, str, NULL, &parser);
 779     heap_free(str);
 780     if(FAILED(hres))
 781         return hres;
 782
 783     if(!parser->source || !parser->source->functions || parser->source->functions->next || parser->source->variables) {
 784         ERR("Invalid parser result!\n");
 785         parser_release(parser);
 786         return E_UNEXPECTED;
 787     }
 788     expr = parser->source->functions->expr;
 789
 790     hres = create_source_function(parser, expr->parameter_list, expr->source_elements, NULL, expr->src_str,
 791             expr->src_len, &function);
 792     parser_release(parser);
 793     if(FAILED(hres))
 794         return hres;
 795
 796     *ret = to_disp(function);
 797     return S_OK;
 798 }
 799
 800 static HRESULT FunctionConstr_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 801         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 802 {
 803     HRESULT hres;
 804
 805     TRACE("\n");
 806
 807     switch(flags) {
 808     case DISPATCH_CONSTRUCT: {
 809         IDispatch *ret;
 810
 811         hres = construct_function(ctx, dp, ei, &ret);
 812         if(FAILED(hres))
 813             return hres;
 814
 815         V_VT(retv) = VT_DISPATCH;
 816         V_DISPATCH(retv) = ret;
 817         break;
 818     }
 819     default:
 820         FIXME("unimplemented flags %x\n", flags);
 821         return E_NOTIMPL;
 822     }
 823
 824     return S_OK;
 825 }
 826
 827 static HRESULT FunctionProt_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 828         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 829 {
 830     FIXME("\n");
 831     return E_NOTIMPL;
 832 }
 833
 834 HRESULT init_function_constr(script_ctx_t *ctx, jsdisp_t *object_prototype)
 835 {
 836     FunctionInstance *prot, *constr;
 837     HRESULT hres;
 838
 839     static const WCHAR FunctionW[] = {'F','u','n','c','t','i','o','n',0};
 840
 841     hres = create_function(ctx, NULL, PROPF_CONSTR, TRUE, object_prototype, &prot);
 842     if(FAILED(hres))
 843         return hres;
 844
 845     prot->value_proc = FunctionProt_value;
 846     prot->name = prototypeW;
 847
 848     hres = create_function(ctx, NULL, PROPF_CONSTR|1, TRUE, &prot->dispex, &constr);
 849     if(SUCCEEDED(hres)) {
 850         constr->value_proc = FunctionConstr_value;
 851         constr->name = FunctionW;
 852         hres = set_prototype(ctx, &constr->dispex, &prot->dispex);
 853         if(FAILED(hres))
 854             jsdisp_release(&constr->dispex);
 855     }
 856     jsdisp_release(&prot->dispex);
 857     if(FAILED(hres))
 858         return hres;
 859
 860     ctx->function_constr = &constr->dispex;
 861     return S_OK;
 862 }