dlls/jscript/jscript.h

   1 /*
   2  * Copyright 2008-2009 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 <stdarg.h>
  20 #include <stdio.h>
  21
  22 #define COBJMACROS
  23
  24 #include "windef.h"
  25 #include "winbase.h"
  26 #include "winuser.h"
  27 #include "ole2.h"
  28 #include "dispex.h"
  29 #include "activscp.h"
  30
  31 #include "resource.h"
  32
  33 #include "wine/unicode.h"
  34 #include "wine/list.h"
  35
  36 typedef struct _script_ctx_t script_ctx_t;
  37 typedef struct _exec_ctx_t exec_ctx_t;
  38 typedef struct _dispex_prop_t dispex_prop_t;
  39
  40 typedef struct {
  41     EXCEPINFO ei;
  42     VARIANT var;
  43 } jsexcept_t;
  44
  45 typedef struct {
  46     void **blocks;
  47     DWORD block_cnt;
  48     DWORD last_block;
  49     DWORD offset;
  50     BOOL mark;
  51     struct list custom_blocks;
  52 } jsheap_t;
  53
  54 void jsheap_init(jsheap_t*);
  55 void *jsheap_alloc(jsheap_t*,DWORD);
  56 void *jsheap_grow(jsheap_t*,void*,DWORD,DWORD);
  57 void jsheap_clear(jsheap_t*);
  58 void jsheap_free(jsheap_t*);
  59 jsheap_t *jsheap_mark(jsheap_t*);
  60
  61 typedef struct jsdisp_t jsdisp_t;
  62
  63 extern HINSTANCE jscript_hinstance;
  64
  65 #define PROPF_ARGMASK 0x00ff
  66 #define PROPF_METHOD  0x0100
  67 #define PROPF_ENUM    0x0200
  68 #define PROPF_CONSTR  0x0400
  69 #define PROPF_CONST   0x0800
  70
  71 /* NOTE: Keep in sync with names in Object.toString implementation */
  72 typedef enum {
  73     JSCLASS_NONE,
  74     JSCLASS_ARRAY,
  75     JSCLASS_BOOLEAN,
  76     JSCLASS_DATE,
  77     JSCLASS_ERROR,
  78     JSCLASS_FUNCTION,
  79     JSCLASS_GLOBAL,
  80     JSCLASS_MATH,
  81     JSCLASS_NUMBER,
  82     JSCLASS_OBJECT,
  83     JSCLASS_REGEXP,
  84     JSCLASS_STRING,
  85     JSCLASS_ARGUMENTS,
  86     JSCLASS_VBARRAY
  87 } jsclass_t;
  88
  89 jsdisp_t *iface_to_jsdisp(IUnknown*);
  90
  91 typedef struct {
  92     union {
  93         IDispatch *disp;
  94         IDispatchEx *dispex;
  95         jsdisp_t *jsdisp;
  96     } u;
  97     DWORD flags;
  98 } vdisp_t;
  99
 100 #define VDISP_DISPEX  0x0001
 101 #define VDISP_JSDISP  0x0002
 102
 103 static inline void vdisp_release(vdisp_t *vdisp)
 104 {
 105     IDispatch_Release(vdisp->u.disp);
 106 }
 107
 108 static inline BOOL is_jsdisp(vdisp_t *vdisp)
 109 {
 110     return (vdisp->flags & VDISP_JSDISP) != 0;
 111 }
 112
 113 static inline BOOL is_dispex(vdisp_t *vdisp)
 114 {
 115     return (vdisp->flags & VDISP_DISPEX) != 0;
 116 }
 117
 118 static inline void set_jsdisp(vdisp_t *vdisp, jsdisp_t *jsdisp)
 119 {
 120     vdisp->u.jsdisp = jsdisp;
 121     vdisp->flags = VDISP_JSDISP | VDISP_DISPEX;
 122     IDispatch_AddRef(vdisp->u.disp);
 123 }
 124
 125 static inline void set_disp(vdisp_t *vdisp, IDispatch *disp)
 126 {
 127     IDispatchEx *dispex;
 128     jsdisp_t *jsdisp;
 129     HRESULT hres;
 130
 131     jsdisp = iface_to_jsdisp((IUnknown*)disp);
 132     if(jsdisp) {
 133         vdisp->u.jsdisp = jsdisp;
 134         vdisp->flags = VDISP_JSDISP | VDISP_DISPEX;
 135         return;
 136     }
 137
 138     hres = IDispatch_QueryInterface(disp, &IID_IDispatchEx, (void**)&dispex);
 139     if(SUCCEEDED(hres)) {
 140         vdisp->u.dispex = dispex;
 141         vdisp->flags = VDISP_DISPEX;
 142         return;
 143     }
 144
 145     IDispatch_AddRef(disp);
 146     vdisp->u.disp = disp;
 147     vdisp->flags = 0;
 148 }
 149
 150 static inline jsdisp_t *get_jsdisp(vdisp_t *vdisp)
 151 {
 152     return is_jsdisp(vdisp) ? vdisp->u.jsdisp : NULL;
 153 }
 154
 155 typedef HRESULT (*builtin_invoke_t)(script_ctx_t*,vdisp_t*,WORD,DISPPARAMS*,VARIANT*,jsexcept_t*,IServiceProvider*);
 156
 157 typedef struct {
 158     const WCHAR *name;
 159     builtin_invoke_t invoke;
 160     DWORD flags;
 161 } builtin_prop_t;
 162
 163 typedef struct {
 164     jsclass_t class;
 165     builtin_prop_t value_prop;
 166     DWORD props_cnt;
 167     const builtin_prop_t *props;
 168     void (*destructor)(jsdisp_t*);
 169     void (*on_put)(jsdisp_t*,const WCHAR*);
 170 } builtin_info_t;
 171
 172 struct jsdisp_t {
 173     const IDispatchExVtbl  *lpIDispatchExVtbl;
 174
 175     LONG ref;
 176
 177     DWORD buf_size;
 178     DWORD prop_cnt;
 179     dispex_prop_t *props;
 180     script_ctx_t *ctx;
 181
 182     jsdisp_t *prototype;
 183
 184     const builtin_info_t *builtin_info;
 185 };
 186
 187 #define _IDispatchEx_(x) ((IDispatchEx*) &(x)->lpIDispatchExVtbl)
 188
 189 static inline IDispatch *to_disp(jsdisp_t *jsdisp)
 190 {
 191     return (IDispatch*)&jsdisp->lpIDispatchExVtbl;
 192 }
 193
 194 static inline void jsdisp_addref(jsdisp_t *jsdisp)
 195 {
 196     IDispatchEx_AddRef(_IDispatchEx_(jsdisp));
 197 }
 198
 199 static inline void jsdisp_release(jsdisp_t *jsdisp)
 200 {
 201     IDispatchEx_Release(_IDispatchEx_(jsdisp));
 202 }
 203
 204 HRESULT create_dispex(script_ctx_t*,const builtin_info_t*,jsdisp_t*,jsdisp_t**);
 205 HRESULT init_dispex(jsdisp_t*,script_ctx_t*,const builtin_info_t*,jsdisp_t*);
 206 HRESULT init_dispex_from_constr(jsdisp_t*,script_ctx_t*,const builtin_info_t*,jsdisp_t*);
 207
 208 HRESULT disp_call(script_ctx_t*,IDispatch*,DISPID,WORD,DISPPARAMS*,VARIANT*,jsexcept_t*,IServiceProvider*);
 209 HRESULT jsdisp_call_value(jsdisp_t*,WORD,DISPPARAMS*,VARIANT*,jsexcept_t*,IServiceProvider*);
 210 HRESULT jsdisp_call(jsdisp_t*,DISPID,WORD,DISPPARAMS*,VARIANT*,jsexcept_t*,IServiceProvider*);
 211 HRESULT jsdisp_call_name(jsdisp_t*,const WCHAR*,WORD,DISPPARAMS*,VARIANT*,jsexcept_t*,IServiceProvider*);
 212 HRESULT disp_propget(script_ctx_t*,IDispatch*,DISPID,VARIANT*,jsexcept_t*,IServiceProvider*);
 213 HRESULT disp_propput(script_ctx_t*,IDispatch*,DISPID,VARIANT*,jsexcept_t*,IServiceProvider*);
 214 HRESULT jsdisp_propget(jsdisp_t*,DISPID,VARIANT*,jsexcept_t*,IServiceProvider*);
 215 HRESULT jsdisp_propput_name(jsdisp_t*,const WCHAR*,VARIANT*,jsexcept_t*,IServiceProvider*);
 216 HRESULT jsdisp_propput_const(jsdisp_t*,const WCHAR*,VARIANT*);
 217 HRESULT jsdisp_propput_idx(jsdisp_t*,DWORD,VARIANT*,jsexcept_t*,IServiceProvider*);
 218 HRESULT jsdisp_propget_name(jsdisp_t*,LPCWSTR,VARIANT*,jsexcept_t*,IServiceProvider*);
 219 HRESULT jsdisp_get_idx(jsdisp_t*,DWORD,VARIANT*,jsexcept_t*,IServiceProvider*);
 220 HRESULT jsdisp_get_id(jsdisp_t*,const WCHAR*,DWORD,DISPID*);
 221 HRESULT jsdisp_delete_idx(jsdisp_t*,DWORD);
 222
 223 HRESULT create_builtin_function(script_ctx_t*,builtin_invoke_t,const WCHAR*,const builtin_info_t*,DWORD,
 224         jsdisp_t*,jsdisp_t**);
 225 HRESULT Function_value(script_ctx_t*,vdisp_t*,WORD,DISPPARAMS*,VARIANT*,jsexcept_t*,IServiceProvider*);
 226
 227 HRESULT throw_eval_error(script_ctx_t*,jsexcept_t*,HRESULT,const WCHAR*);
 228 HRESULT throw_generic_error(script_ctx_t*,jsexcept_t*,HRESULT,const WCHAR*);
 229 HRESULT throw_range_error(script_ctx_t*,jsexcept_t*,HRESULT,const WCHAR*);
 230 HRESULT throw_reference_error(script_ctx_t*,jsexcept_t*,HRESULT,const WCHAR*);
 231 HRESULT throw_regexp_error(script_ctx_t*,jsexcept_t*,HRESULT,const WCHAR*);
 232 HRESULT throw_syntax_error(script_ctx_t*,jsexcept_t*,HRESULT,const WCHAR*);
 233 HRESULT throw_type_error(script_ctx_t*,jsexcept_t*,HRESULT,const WCHAR*);
 234 HRESULT throw_uri_error(script_ctx_t*,jsexcept_t*,HRESULT,const WCHAR*);
 235
 236 HRESULT create_object(script_ctx_t*,jsdisp_t*,jsdisp_t**);
 237 HRESULT create_math(script_ctx_t*,jsdisp_t**);
 238 HRESULT create_array(script_ctx_t*,DWORD,jsdisp_t**);
 239 HRESULT create_regexp(script_ctx_t*,const WCHAR *,int,DWORD,jsdisp_t**);
 240 HRESULT create_regexp_var(script_ctx_t*,VARIANT*,VARIANT*,jsdisp_t**);
 241 HRESULT create_string(script_ctx_t*,const WCHAR*,DWORD,jsdisp_t**);
 242 HRESULT create_bool(script_ctx_t*,VARIANT_BOOL,jsdisp_t**);
 243 HRESULT create_number(script_ctx_t*,VARIANT*,jsdisp_t**);
 244 HRESULT create_vbarray(script_ctx_t*,SAFEARRAY*,jsdisp_t**);
 245
 246 typedef enum {
 247     NO_HINT,
 248     HINT_STRING,
 249     HINT_NUMBER
 250 } hint_t;
 251
 252 HRESULT to_primitive(script_ctx_t*,VARIANT*,jsexcept_t*,VARIANT*, hint_t);
 253 HRESULT to_boolean(VARIANT*,VARIANT_BOOL*);
 254 HRESULT to_number(script_ctx_t*,VARIANT*,jsexcept_t*,VARIANT*);
 255 HRESULT to_integer(script_ctx_t*,VARIANT*,jsexcept_t*,VARIANT*);
 256 HRESULT to_int32(script_ctx_t*,VARIANT*,jsexcept_t*,INT*);
 257 HRESULT to_uint32(script_ctx_t*,VARIANT*,jsexcept_t*,DWORD*);
 258 HRESULT to_string(script_ctx_t*,VARIANT*,jsexcept_t*,BSTR*);
 259 HRESULT to_object(script_ctx_t*,VARIANT*,IDispatch**);
 260
 261 typedef struct named_item_t {
 262     IDispatch *disp;
 263     DWORD flags;
 264     LPWSTR name;
 265
 266     struct named_item_t *next;
 267 } named_item_t;
 268
 269 typedef struct _cc_var_t cc_var_t;
 270
 271 typedef struct {
 272     cc_var_t *vars;
 273 } cc_ctx_t;
 274
 275 void release_cc(cc_ctx_t*);
 276
 277 struct _script_ctx_t {
 278     LONG ref;
 279
 280     SCRIPTSTATE state;
 281     exec_ctx_t *exec_ctx;
 282     named_item_t *named_items;
 283     IActiveScriptSite *site;
 284     IInternetHostSecurityManager *secmgr;
 285     DWORD safeopt;
 286     DWORD version;
 287     LCID lcid;
 288     cc_ctx_t *cc;
 289
 290     jsheap_t tmp_heap;
 291
 292     IDispatch *host_global;
 293
 294     BSTR last_match;
 295     DWORD last_match_index;
 296     DWORD last_match_length;
 297
 298     jsdisp_t *global;
 299     jsdisp_t *function_constr;
 300     jsdisp_t *activex_constr;
 301     jsdisp_t *array_constr;
 302     jsdisp_t *bool_constr;
 303     jsdisp_t *date_constr;
 304     jsdisp_t *error_constr;
 305     jsdisp_t *eval_error_constr;
 306     jsdisp_t *range_error_constr;
 307     jsdisp_t *reference_error_constr;
 308     jsdisp_t *regexp_error_constr;
 309     jsdisp_t *syntax_error_constr;
 310     jsdisp_t *type_error_constr;
 311     jsdisp_t *uri_error_constr;
 312     jsdisp_t *number_constr;
 313     jsdisp_t *object_constr;
 314     jsdisp_t *regexp_constr;
 315     jsdisp_t *string_constr;
 316     jsdisp_t *vbarray_constr;
 317 };
 318
 319 void script_release(script_ctx_t*);
 320
 321 static inline void script_addref(script_ctx_t *ctx)
 322 {
 323     ctx->ref++;
 324 }
 325
 326 HRESULT init_global(script_ctx_t*);
 327 HRESULT init_function_constr(script_ctx_t*,jsdisp_t*);
 328 HRESULT create_object_prototype(script_ctx_t*,jsdisp_t**);
 329
 330 HRESULT create_activex_constr(script_ctx_t*,jsdisp_t**);
 331 HRESULT create_array_constr(script_ctx_t*,jsdisp_t*,jsdisp_t**);
 332 HRESULT create_bool_constr(script_ctx_t*,jsdisp_t*,jsdisp_t**);
 333 HRESULT create_date_constr(script_ctx_t*,jsdisp_t*,jsdisp_t**);
 334 HRESULT init_error_constr(script_ctx_t*,jsdisp_t*);
 335 HRESULT create_number_constr(script_ctx_t*,jsdisp_t*,jsdisp_t**);
 336 HRESULT create_object_constr(script_ctx_t*,jsdisp_t*,jsdisp_t**);
 337 HRESULT create_regexp_constr(script_ctx_t*,jsdisp_t*,jsdisp_t**);
 338 HRESULT create_string_constr(script_ctx_t*,jsdisp_t*,jsdisp_t**);
 339 HRESULT create_vbarray_constr(script_ctx_t*,jsdisp_t*,jsdisp_t**);
 340
 341 IUnknown *create_ax_site(script_ctx_t*);
 342
 343 typedef struct {
 344     const WCHAR *str;
 345     DWORD len;
 346 } match_result_t;
 347
 348 #define REM_CHECK_GLOBAL   0x0001
 349 #define REM_RESET_INDEX    0x0002
 350 #define REM_NO_CTX_UPDATE  0x0004
 351 HRESULT regexp_match_next(script_ctx_t*,jsdisp_t*,DWORD,const WCHAR*,DWORD,const WCHAR**,match_result_t**,
 352         DWORD*,DWORD*,match_result_t*);
 353 HRESULT regexp_match(script_ctx_t*,jsdisp_t*,const WCHAR*,DWORD,BOOL,match_result_t**,DWORD*);
 354 HRESULT parse_regexp_flags(const WCHAR*,DWORD,DWORD*);
 355 HRESULT regexp_string_match(script_ctx_t*,jsdisp_t*,BSTR,VARIANT*,jsexcept_t*);
 356
 357 static inline VARIANT *get_arg(DISPPARAMS *dp, DWORD i)
 358 {
 359     return dp->rgvarg + dp->cArgs-i-1;
 360 }
 361
 362 static inline DWORD arg_cnt(const DISPPARAMS *dp)
 363 {
 364     return dp->cArgs - dp->cNamedArgs;
 365 }
 366
 367 static inline BOOL is_class(jsdisp_t *jsdisp, jsclass_t class)
 368 {
 369     return jsdisp->builtin_info->class == class;
 370 }
 371
 372 static inline BOOL is_vclass(vdisp_t *vdisp, jsclass_t class)
 373 {
 374     return is_jsdisp(vdisp) && is_class(vdisp->u.jsdisp, class);
 375 }
 376
 377 static inline BOOL is_num_vt(enum VARENUM vt)
 378 {
 379     return vt == VT_I4 || vt == VT_R8;
 380 }
 381
 382 static inline DOUBLE num_val(const VARIANT *v)
 383 {
 384     return V_VT(v) == VT_I4 ? V_I4(v) : V_R8(v);
 385 }
 386
 387 static inline void num_set_int(VARIANT *v, INT i)
 388 {
 389     V_VT(v) = VT_I4;
 390     V_I4(v) = i;
 391 }
 392
 393 static inline void num_set_val(VARIANT *v, DOUBLE d)
 394 {
 395     if(d == (DOUBLE)(INT)d) {
 396         V_VT(v) = VT_I4;
 397         V_I4(v) = d;
 398     }else {
 399         V_VT(v) = VT_R8;
 400         V_R8(v) = d;
 401     }
 402 }
 403
 404 static inline void num_set_nan(VARIANT *v)
 405 {
 406     V_VT(v) = VT_R8;
 407 #ifdef NAN
 408     V_R8(v) = NAN;
 409 #else
 410     V_UI8(v) = (ULONGLONG)0x7ff80000<<32;
 411 #endif
 412 }
 413
 414 static inline DOUBLE ret_nan(void)
 415 {
 416     VARIANT v;
 417     num_set_nan(&v);
 418     return V_R8(&v);
 419 }
 420
 421 static inline void num_set_inf(VARIANT *v, BOOL positive)
 422 {
 423     V_VT(v) = VT_R8;
 424 #ifdef INFINITY
 425     V_R8(v) = positive ? INFINITY : -INFINITY;
 426 #else
 427     V_UI8(v) = (ULONGLONG)0x7ff00000<<32;
 428     if(!positive)
 429         V_R8(v) = -V_R8(v);
 430 #endif
 431 }
 432
 433 static inline void var_set_jsdisp(VARIANT *v, jsdisp_t *jsdisp)
 434 {
 435     V_VT(v) = VT_DISPATCH;
 436     V_DISPATCH(v) = to_disp(jsdisp);
 437 }
 438
 439 static inline DWORD make_grfdex(script_ctx_t *ctx, DWORD flags)
 440 {
 441     return (ctx->version << 28) | flags;
 442 }
 443
 444 #define FACILITY_JSCRIPT 10
 445
 446 #define MAKE_JSERROR(code) MAKE_HRESULT(SEVERITY_ERROR, FACILITY_JSCRIPT, code)
 447
 448 #define JS_E_TO_PRIMITIVE            MAKE_JSERROR(IDS_TO_PRIMITIVE)
 449 #define JS_E_INVALIDARG              MAKE_JSERROR(IDS_INVALID_CALL_ARG)
 450 #define JS_E_SUBSCRIPT_OUT_OF_RANGE  MAKE_JSERROR(IDS_SUBSCRIPT_OUT_OF_RANGE)
 451 #define JS_E_CANNOT_CREATE_OBJ       MAKE_JSERROR(IDS_CREATE_OBJ_ERROR)
 452 #define JS_E_INVALID_PROPERTY        MAKE_JSERROR(IDS_NO_PROPERTY)
 453 #define JS_E_INVALID_ACTION          MAKE_JSERROR(IDS_UNSUPPORTED_ACTION)
 454 #define JS_E_MISSING_ARG             MAKE_JSERROR(IDS_ARG_NOT_OPT)
 455 #define JS_E_SYNTAX                  MAKE_JSERROR(IDS_SYNTAX_ERROR)
 456 #define JS_E_MISSING_SEMICOLON       MAKE_JSERROR(IDS_SEMICOLON)
 457 #define JS_E_MISSING_LBRACKET        MAKE_JSERROR(IDS_LBRACKET)
 458 #define JS_E_MISSING_RBRACKET        MAKE_JSERROR(IDS_RBRACKET)
 459 #define JS_E_UNTERMINATED_STRING     MAKE_JSERROR(IDS_UNTERMINATED_STR)
 460 #define JS_E_DISABLED_CC             MAKE_JSERROR(IDS_DISABLED_CC)
 461 #define JS_E_FUNCTION_EXPECTED       MAKE_JSERROR(IDS_NOT_FUNC)
 462 #define JS_E_DATE_EXPECTED           MAKE_JSERROR(IDS_NOT_DATE)
 463 #define JS_E_NUMBER_EXPECTED         MAKE_JSERROR(IDS_NOT_NUM)
 464 #define JS_E_OBJECT_EXPECTED         MAKE_JSERROR(IDS_OBJECT_EXPECTED)
 465 #define JS_E_ILLEGAL_ASSIGN          MAKE_JSERROR(IDS_ILLEGAL_ASSIGN)
 466 #define JS_E_UNDEFINED_VARIABLE      MAKE_JSERROR(IDS_UNDEFINED)
 467 #define JS_E_BOOLEAN_EXPECTED        MAKE_JSERROR(IDS_NOT_BOOL)
 468 #define JS_E_VBARRAY_EXPECTED        MAKE_JSERROR(IDS_NOT_VBARRAY)
 469 #define JS_E_JSCRIPT_EXPECTED        MAKE_JSERROR(IDS_JSCRIPT_EXPECTED)
 470 #define JS_E_REGEXP_SYNTAX           MAKE_JSERROR(IDS_REGEXP_SYNTAX_ERROR)
 471 #define JS_E_INVALID_URI_CHAR        MAKE_JSERROR(IDS_URI_INVALID_CHAR)
 472 #define JS_E_INVALID_LENGTH          MAKE_JSERROR(IDS_INVALID_LENGTH)
 473 #define JS_E_ARRAY_EXPECTED          MAKE_JSERROR(IDS_ARRAY_EXPECTED)
 474
 475 static inline BOOL is_jscript_error(HRESULT hres)
 476 {
 477     return HRESULT_FACILITY(hres) == FACILITY_JSCRIPT;
 478 }
 479
 480 const char *debugstr_variant(const VARIANT*);
 481
 482 HRESULT WINAPI JScriptFactory_CreateInstance(IClassFactory*,IUnknown*,REFIID,void**);
 483
 484 extern LONG module_ref;
 485
 486 static inline void lock_module(void)
 487 {
 488     InterlockedIncrement(&module_ref);
 489 }
 490
 491 static inline void unlock_module(void)
 492 {
 493     InterlockedDecrement(&module_ref);
 494 }
 495
 496 static inline void *heap_alloc(size_t len)
 497 {
 498     return HeapAlloc(GetProcessHeap(), 0, len);
 499 }
 500
 501 static inline void *heap_alloc_zero(size_t len)
 502 {
 503     return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len);
 504 }
 505
 506 static inline void *heap_realloc(void *mem, size_t len)
 507 {
 508     return HeapReAlloc(GetProcessHeap(), 0, mem, len);
 509 }
 510
 511 static inline BOOL heap_free(void *mem)
 512 {
 513     return HeapFree(GetProcessHeap(), 0, mem);
 514 }
 515
 516 static inline LPWSTR heap_strdupW(LPCWSTR str)
 517 {
 518     LPWSTR ret = NULL;
 519
 520     if(str) {
 521         DWORD size;
 522
 523         size = (strlenW(str)+1)*sizeof(WCHAR);
 524         ret = heap_alloc(size);
 525         memcpy(ret, str, size);
 526     }
 527
 528     return ret;
 529 }
 530
 531 #define DEFINE_THIS(cls,ifc,iface) ((cls*)((BYTE*)(iface)-offsetof(cls,lp ## ifc ## Vtbl)))