dlls/jscript/engine.h

   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 typedef struct _source_elements_t source_elements_t;
  20 typedef struct _function_expression_t function_expression_t;
  21 typedef struct _expression_t expression_t;
  22
  23 typedef struct _function_declaration_t {
  24     function_expression_t *expr;
  25
  26     struct _function_declaration_t *next;
  27 } function_declaration_t;
  28
  29 typedef struct _var_list_t {
  30     const WCHAR *identifier;
  31
  32     struct _var_list_t *next;
  33 } var_list_t;
  34
  35 typedef struct _func_stack {
  36     function_declaration_t *func_head;
  37     function_declaration_t *func_tail;
  38     var_list_t *var_head;
  39     var_list_t *var_tail;
  40
  41     struct _func_stack *next;
  42 } func_stack_t;
  43
  44 #define OP_LIST                            \
  45     X(add,        1, 0,0)                  \
  46     X(bool,       1, ARG_INT,    0)        \
  47     X(bneg,       1, 0,0)                  \
  48     X(div,        1, 0,0)                  \
  49     X(double,     1, ARG_SBL,    0)        \
  50     X(eq,         1, 0,0)                  \
  51     X(eq2,        1, 0,0)                  \
  52     X(ident,      1, ARG_BSTR,   0)        \
  53     X(in,         1, 0,0)                  \
  54     X(int,        1, ARG_INT,    0)        \
  55     X(jmp,        0, ARG_ADDR,   0)        \
  56     X(jmp_nz,     0, ARG_ADDR,   0)        \
  57     X(jmp_z,      0, ARG_ADDR,   0)        \
  58     X(minus,      1, 0,0)                  \
  59     X(mod,        1, 0,0)                  \
  60     X(mul,        1, 0,0)                  \
  61     X(neg,        1, 0,0)                  \
  62     X(neq,        1, 0,0)                  \
  63     X(neq2,       1, 0,0)                  \
  64     X(new,        1, ARG_INT,    0)        \
  65     X(null,       1, 0,0)                  \
  66     X(or,         1, 0,0)                  \
  67     X(pop,        1, 0,0)                  \
  68     X(regexp,     1, ARG_STR,    ARG_INT)  \
  69     X(str,        1, ARG_STR,    0)        \
  70     X(this,       1, 0,0)                  \
  71     X(tonum,      1, 0,0)                  \
  72     X(tree,       1, ARG_EXPR,   0)        \
  73     X(ret,        0, 0,0)                  \
  74     X(sub,        1, 0,0)                  \
  75     X(void,       1, 0,0)                  \
  76     X(xor,        1, 0,0)
  77
  78 typedef enum {
  79 #define X(x,a,b,c) OP_##x,
  80 OP_LIST
  81 #undef X
  82     OP_LAST
  83 } jsop_t;
  84
  85 typedef union {
  86     expression_t *expr;
  87     BSTR bstr;
  88     double *dbl;
  89     LONG lng;
  90     WCHAR *str;
  91     unsigned uint;
  92 } instr_arg_t;
  93
  94 typedef enum {
  95     ARG_NONE = 0,
  96     ARG_ADDR,
  97     ARG_BSTR,
  98     ARG_EXPR,
  99     ARG_INT,
 100     ARG_STR
 101 } instr_arg_type_t;
 102
 103 typedef struct {
 104     jsop_t op;
 105     instr_arg_t arg1;
 106     instr_arg_t arg2;
 107 } instr_t;
 108
 109 typedef struct {
 110     instr_t *instrs;
 111     jsheap_t heap;
 112
 113     BSTR *bstr_pool;
 114     unsigned bstr_pool_size;
 115     unsigned bstr_cnt;
 116 } bytecode_t;
 117
 118 void release_bytecode(bytecode_t*);
 119
 120 typedef struct _compiler_ctx_t compiler_ctx_t;
 121
 122 void release_compiler(compiler_ctx_t*);
 123
 124 typedef struct _parser_ctx_t {
 125     LONG ref;
 126
 127     WCHAR *begin;
 128     const WCHAR *end;
 129     const WCHAR *ptr;
 130
 131     script_ctx_t *script;
 132     source_elements_t *source;
 133     BOOL nl;
 134     BOOL is_html;
 135     BOOL lexer_error;
 136     HRESULT hres;
 137
 138     jsheap_t heap;
 139
 140     func_stack_t *func_stack;
 141
 142     bytecode_t *code;
 143     compiler_ctx_t *compiler;
 144
 145     struct _parser_ctx_t *next;
 146 } parser_ctx_t;
 147
 148 HRESULT script_parse(script_ctx_t*,const WCHAR*,const WCHAR*,parser_ctx_t**) DECLSPEC_HIDDEN;
 149 void parser_release(parser_ctx_t*) DECLSPEC_HIDDEN;
 150
 151 int parser_lex(void*,parser_ctx_t*) DECLSPEC_HIDDEN;
 152
 153 static inline void parser_addref(parser_ctx_t *ctx)
 154 {
 155     ctx->ref++;
 156 }
 157
 158 static inline void *parser_alloc(parser_ctx_t *ctx, DWORD size)
 159 {
 160     return jsheap_alloc(&ctx->heap, size);
 161 }
 162
 163 static inline void *parser_alloc_tmp(parser_ctx_t *ctx, DWORD size)
 164 {
 165     return jsheap_alloc(&ctx->script->tmp_heap, size);
 166 }
 167
 168 typedef struct _scope_chain_t {
 169     LONG ref;
 170     jsdisp_t *obj;
 171     struct _scope_chain_t *next;
 172 } scope_chain_t;
 173
 174 HRESULT scope_push(scope_chain_t*,jsdisp_t*,scope_chain_t**) DECLSPEC_HIDDEN;
 175 void scope_release(scope_chain_t*) DECLSPEC_HIDDEN;
 176
 177 static inline void scope_addref(scope_chain_t *scope)
 178 {
 179     scope->ref++;
 180 }
 181
 182 struct _exec_ctx_t {
 183     LONG ref;
 184
 185     parser_ctx_t *parser;
 186     scope_chain_t *scope_chain;
 187     jsdisp_t *var_disp;
 188     IDispatch *this_obj;
 189     BOOL is_global;
 190
 191     VARIANT *stack;
 192     unsigned stack_size;
 193     unsigned top;
 194
 195     unsigned ip;
 196     jsexcept_t ei;
 197 };
 198
 199 static inline void exec_addref(exec_ctx_t *ctx)
 200 {
 201     ctx->ref++;
 202 }
 203
 204 void exec_release(exec_ctx_t*) DECLSPEC_HIDDEN;
 205 HRESULT create_exec_ctx(script_ctx_t*,IDispatch*,jsdisp_t*,scope_chain_t*,BOOL,exec_ctx_t**) DECLSPEC_HIDDEN;
 206 HRESULT exec_source(exec_ctx_t*,parser_ctx_t*,source_elements_t*,BOOL,jsexcept_t*,VARIANT*) DECLSPEC_HIDDEN;
 207
 208 typedef struct _statement_t statement_t;
 209 typedef struct _parameter_t parameter_t;
 210
 211 HRESULT create_source_function(parser_ctx_t*,parameter_t*,source_elements_t*,scope_chain_t*,
 212         const WCHAR*,DWORD,jsdisp_t**) DECLSPEC_HIDDEN;
 213
 214 typedef enum {
 215     LT_INT,
 216     LT_DOUBLE,
 217     LT_STRING,
 218     LT_BOOL,
 219     LT_NULL,
 220     LT_REGEXP
 221 }literal_type_t;
 222
 223 typedef struct {
 224     literal_type_t type;
 225     union {
 226         LONG lval;
 227         double dval;
 228         const WCHAR *wstr;
 229         VARIANT_BOOL bval;
 230         struct {
 231             const WCHAR *str;
 232             DWORD str_len;
 233             DWORD flags;
 234         } regexp;
 235     } u;
 236 } literal_t;
 237
 238 literal_t *parse_regexp(parser_ctx_t*) DECLSPEC_HIDDEN;
 239 literal_t *new_boolean_literal(parser_ctx_t*,VARIANT_BOOL) DECLSPEC_HIDDEN;
 240
 241 typedef struct _variable_declaration_t {
 242     const WCHAR *identifier;
 243     expression_t *expr;
 244
 245     struct _variable_declaration_t *next;
 246 } variable_declaration_t;
 247
 248 typedef struct _return_type_t return_type_t;
 249
 250 typedef HRESULT (*statement_eval_t)(script_ctx_t*,statement_t*,return_type_t*,VARIANT*);
 251
 252 struct _statement_t {
 253     statement_eval_t eval;
 254     statement_t *next;
 255 };
 256
 257 typedef struct {
 258     statement_t stat;
 259     statement_t *stat_list;
 260 } block_statement_t;
 261
 262 typedef struct {
 263     statement_t stat;
 264     variable_declaration_t *variable_list;
 265 } var_statement_t;
 266
 267 typedef struct {
 268     statement_t stat;
 269     expression_t *expr;
 270 } expression_statement_t;
 271
 272 typedef struct {
 273     statement_t stat;
 274     expression_t *expr;
 275     statement_t *if_stat;
 276     statement_t *else_stat;
 277 } if_statement_t;
 278
 279 typedef struct {
 280     statement_t stat;
 281     BOOL do_while;
 282     expression_t *expr;
 283     statement_t *statement;
 284 } while_statement_t;
 285
 286 typedef struct {
 287     statement_t stat;
 288     variable_declaration_t *variable_list;
 289     expression_t *begin_expr;
 290     expression_t *expr;
 291     expression_t *end_expr;
 292     statement_t *statement;
 293 } for_statement_t;
 294
 295 typedef struct {
 296     statement_t stat;
 297     variable_declaration_t *variable;
 298     expression_t *expr;
 299     expression_t *in_expr;
 300     statement_t *statement;
 301 } forin_statement_t;
 302
 303 typedef struct {
 304     statement_t stat;
 305     const WCHAR *identifier;
 306 } branch_statement_t;
 307
 308 typedef struct {
 309     statement_t stat;
 310     expression_t *expr;
 311     statement_t *statement;
 312 } with_statement_t;
 313
 314 typedef struct {
 315     statement_t stat;
 316     const WCHAR *identifier;
 317     statement_t *statement;
 318 } labelled_statement_t;
 319
 320 typedef struct _case_clausule_t {
 321     expression_t *expr;
 322     statement_t *stat;
 323
 324     struct _case_clausule_t *next;
 325 } case_clausule_t;
 326
 327 typedef struct {
 328     statement_t stat;
 329     expression_t *expr;
 330     case_clausule_t *case_list;
 331 } switch_statement_t;
 332
 333 typedef struct {
 334     const WCHAR *identifier;
 335     statement_t *statement;
 336 } catch_block_t;
 337
 338 typedef struct {
 339     statement_t stat;
 340     statement_t *try_statement;
 341     catch_block_t *catch_block;
 342     statement_t *finally_statement;
 343 } try_statement_t;
 344
 345 HRESULT block_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 346 HRESULT var_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 347 HRESULT empty_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 348 HRESULT expression_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 349 HRESULT if_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 350 HRESULT while_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 351 HRESULT for_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 352 HRESULT forin_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 353 HRESULT continue_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 354 HRESULT break_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 355 HRESULT return_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 356 HRESULT with_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 357 HRESULT labelled_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 358 HRESULT switch_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 359 HRESULT throw_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 360 HRESULT try_statement_eval(script_ctx_t*,statement_t*,return_type_t*,VARIANT*) DECLSPEC_HIDDEN;
 361
 362 typedef struct {
 363     enum {
 364         EXPRVAL_VARIANT,
 365         EXPRVAL_IDREF,
 366         EXPRVAL_NAMEREF,
 367         EXPRVAL_INVALID
 368     } type;
 369     union {
 370         VARIANT var;
 371         struct {
 372             IDispatch *disp;
 373             DISPID id;
 374         } idref;
 375         struct {
 376             IDispatch *disp;
 377             BSTR name;
 378         } nameref;
 379         BSTR identifier;
 380     } u;
 381 } exprval_t;
 382
 383 typedef enum {
 384      EXPR_COMMA,
 385      EXPR_OR,
 386      EXPR_AND,
 387      EXPR_BOR,
 388      EXPR_BXOR,
 389      EXPR_BAND,
 390      EXPR_INSTANCEOF,
 391      EXPR_IN,
 392      EXPR_ADD,
 393      EXPR_SUB,
 394      EXPR_MUL,
 395      EXPR_DIV,
 396      EXPR_MOD,
 397      EXPR_DELETE,
 398      EXPR_VOID,
 399      EXPR_TYPEOF,
 400      EXPR_MINUS,
 401      EXPR_PLUS,
 402      EXPR_POSTINC,
 403      EXPR_POSTDEC,
 404      EXPR_PREINC,
 405      EXPR_PREDEC,
 406      EXPR_EQ,
 407      EXPR_EQEQ,
 408      EXPR_NOTEQ,
 409      EXPR_NOTEQEQ,
 410      EXPR_LESS,
 411      EXPR_LESSEQ,
 412      EXPR_GREATER,
 413      EXPR_GREATEREQ,
 414      EXPR_BITNEG,
 415      EXPR_LOGNEG,
 416      EXPR_LSHIFT,
 417      EXPR_RSHIFT,
 418      EXPR_RRSHIFT,
 419      EXPR_ASSIGN,
 420      EXPR_ASSIGNLSHIFT,
 421      EXPR_ASSIGNRSHIFT,
 422      EXPR_ASSIGNRRSHIFT,
 423      EXPR_ASSIGNADD,
 424      EXPR_ASSIGNSUB,
 425      EXPR_ASSIGNMUL,
 426      EXPR_ASSIGNDIV,
 427      EXPR_ASSIGNMOD,
 428      EXPR_ASSIGNAND,
 429      EXPR_ASSIGNOR,
 430      EXPR_ASSIGNXOR,
 431      EXPR_COND,
 432      EXPR_ARRAY,
 433      EXPR_MEMBER,
 434      EXPR_NEW,
 435      EXPR_CALL,
 436      EXPR_THIS,
 437      EXPR_FUNC,
 438      EXPR_IDENT,
 439      EXPR_ARRAYLIT,
 440      EXPR_PROPVAL,
 441      EXPR_LITERAL
 442 } expression_type_t;
 443
 444 typedef HRESULT (*expression_eval_t)(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*);
 445
 446 struct _expression_t {
 447     expression_type_t type;
 448     expression_eval_t eval;
 449     unsigned instr_off;
 450 };
 451
 452 struct _parameter_t {
 453     const WCHAR *identifier;
 454
 455     struct _parameter_t *next;
 456 };
 457
 458 struct _source_elements_t {
 459     statement_t *statement;
 460     statement_t *statement_tail;
 461     function_declaration_t *functions;
 462     var_list_t *variables;
 463 };
 464
 465 struct _function_expression_t {
 466     expression_t expr;
 467     const WCHAR *identifier;
 468     parameter_t *parameter_list;
 469     source_elements_t *source_elements;
 470     const WCHAR *src_str;
 471     DWORD src_len;
 472 };
 473
 474 typedef struct {
 475     expression_t expr;
 476     expression_t *expression1;
 477     expression_t *expression2;
 478 } binary_expression_t;
 479
 480 typedef struct {
 481     expression_t expr;
 482     expression_t *expression;
 483 } unary_expression_t;
 484
 485 typedef struct {
 486     expression_t expr;
 487     expression_t *expression;
 488     expression_t *true_expression;
 489     expression_t *false_expression;
 490 } conditional_expression_t;
 491
 492 typedef struct {
 493     expression_t expr;
 494     expression_t *member_expr;
 495     expression_t *expression;
 496 } array_expression_t;
 497
 498 typedef struct {
 499     expression_t expr;
 500     expression_t *expression;
 501     const WCHAR *identifier;
 502 } member_expression_t;
 503
 504 typedef struct _argument_t {
 505     expression_t *expr;
 506
 507     struct _argument_t *next;
 508 } argument_t;
 509
 510 typedef struct {
 511     expression_t expr;
 512     expression_t *expression;
 513     argument_t *argument_list;
 514 } call_expression_t;
 515
 516 typedef struct {
 517     expression_t expr;
 518     const WCHAR *identifier;
 519 } identifier_expression_t;
 520
 521 typedef struct {
 522     expression_t expr;
 523     literal_t *literal;
 524 } literal_expression_t;
 525
 526 typedef struct _array_element_t {
 527     int elision;
 528     expression_t *expr;
 529
 530     struct _array_element_t *next;
 531 } array_element_t;
 532
 533 typedef struct {
 534     expression_t expr;
 535     array_element_t *element_list;
 536     int length;
 537 } array_literal_expression_t;
 538
 539 typedef struct _prop_val_t {
 540     literal_t *name;
 541     expression_t *value;
 542
 543     struct _prop_val_t *next;
 544 } prop_val_t;
 545
 546 typedef struct {
 547     expression_t expr;
 548     prop_val_t *property_list;
 549 } property_value_expression_t;
 550
 551 HRESULT function_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 552 HRESULT array_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 553 HRESULT member_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 554 HRESULT call_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 555 HRESULT identifier_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 556 HRESULT array_literal_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 557 HRESULT property_value_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 558
 559 HRESULT binary_and_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 560 HRESULT instanceof_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 561 HRESULT delete_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 562 HRESULT typeof_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 563 HRESULT post_increment_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 564 HRESULT post_decrement_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 565 HRESULT pre_increment_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 566 HRESULT pre_decrement_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 567 HRESULT less_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 568 HRESULT lesseq_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 569 HRESULT greater_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 570 HRESULT greatereq_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 571 HRESULT left_shift_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 572 HRESULT right_shift_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 573 HRESULT right2_shift_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 574 HRESULT assign_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 575 HRESULT assign_lshift_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 576 HRESULT assign_rshift_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 577 HRESULT assign_rrshift_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 578 HRESULT assign_add_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 579 HRESULT assign_sub_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 580 HRESULT assign_mul_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 581 HRESULT assign_div_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 582 HRESULT assign_mod_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 583 HRESULT assign_and_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 584 HRESULT assign_or_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 585 HRESULT assign_xor_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 586
 587 HRESULT compiled_expression_eval(script_ctx_t*,expression_t*,DWORD,jsexcept_t*,exprval_t*) DECLSPEC_HIDDEN;
 588
 589 HRESULT compile_subscript(parser_ctx_t*,expression_t*,unsigned*) DECLSPEC_HIDDEN;