dlls/jscript/engine.h

   1 /*
   2  * Copyright 2008,2011 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 typedef struct _statement_t statement_t;
  23
  24 typedef struct _function_declaration_t {
  25     function_expression_t *expr;
  26
  27     struct _function_declaration_t *next;
  28 } function_declaration_t;
  29
  30 typedef struct _var_list_t {
  31     const WCHAR *identifier;
  32
  33     struct _var_list_t *next;
  34 } var_list_t;
  35
  36 typedef struct _func_stack {
  37     function_declaration_t *func_head;
  38     function_declaration_t *func_tail;
  39     var_list_t *var_head;
  40     var_list_t *var_tail;
  41
  42     struct _func_stack *next;
  43 } func_stack_t;
  44
  45 #define OP_LIST                            \
  46     X(add,        1, 0,0)                  \
  47     X(and,        1, 0,0)                  \
  48     X(array,      1, 0,0)                  \
  49     X(assign,     1, 0,0)                  \
  50     X(bool,       1, ARG_INT,    0)        \
  51     X(bneg,       1, 0,0)                  \
  52     X(call,       1, ARG_UINT,   ARG_UINT) \
  53     X(call_member,1, ARG_UINT,   ARG_UINT) \
  54     X(carray,     1, ARG_UINT,   0)        \
  55     X(case,       0, ARG_ADDR,   0)        \
  56     X(cnd_nz,     0, ARG_ADDR,   0)        \
  57     X(cnd_z,      0, ARG_ADDR,   0)        \
  58     X(delete,     1, 0,0)                  \
  59     X(delete_ident,1,ARG_BSTR,   0)        \
  60     X(div,        1, 0,0)                  \
  61     X(double,     1, ARG_DBL,    0)        \
  62     X(end_finally,1, 0,0)                  \
  63     X(eq,         1, 0,0)                  \
  64     X(eq2,        1, 0,0)                  \
  65     X(forin,      0, ARG_ADDR,   0)        \
  66     X(func,       1, ARG_FUNC,   0)        \
  67     X(gt,         1, 0,0)                  \
  68     X(gteq,       1, 0,0)                  \
  69     X(ident,      1, ARG_BSTR,   0)        \
  70     X(identid,    1, ARG_BSTR,   ARG_INT)  \
  71     X(in,         1, 0,0)                  \
  72     X(instanceof, 1, 0,0)                  \
  73     X(int,        1, ARG_INT,    0)        \
  74     X(jmp,        0, ARG_ADDR,   0)        \
  75     X(jmp_z,      0, ARG_ADDR,   0)        \
  76     X(lshift,     1, 0,0)                  \
  77     X(lt,         1, 0,0)                  \
  78     X(lteq,       1, 0,0)                  \
  79     X(member,     1, ARG_BSTR,   0)        \
  80     X(memberid,   1, ARG_UINT,   0)        \
  81     X(minus,      1, 0,0)                  \
  82     X(mod,        1, 0,0)                  \
  83     X(mul,        1, 0,0)                  \
  84     X(neg,        1, 0,0)                  \
  85     X(neq,        1, 0,0)                  \
  86     X(neq2,       1, 0,0)                  \
  87     X(new,        1, ARG_INT,    0)        \
  88     X(new_obj,    1, 0,0)                  \
  89     X(null,       1, 0,0)                  \
  90     X(obj_prop,   1, ARG_BSTR,   0)        \
  91     X(or,         1, 0,0)                  \
  92     X(pop,        1, 0,0)                  \
  93     X(pop_except, 1, 0,0)                  \
  94     X(pop_scope,  1, 0,0)                  \
  95     X(postinc,    1, ARG_INT,    0)        \
  96     X(preinc,     1, ARG_INT,    0)        \
  97     X(push_except,1, ARG_ADDR,   ARG_BSTR) \
  98     X(push_scope, 1, 0,0)                  \
  99     X(regexp,     1, ARG_STR,    ARG_INT)  \
 100     X(rshift,     1, 0,0)                  \
 101     X(rshift2,    1, 0,0)                  \
 102     X(str,        1, ARG_STR,    0)        \
 103     X(this,       1, 0,0)                  \
 104     X(throw,      0, 0,0)                  \
 105     X(throw_ref,  0, ARG_UINT,   0)        \
 106     X(throw_type, 0, ARG_UINT,   ARG_STR)  \
 107     X(tonum,      1, 0,0)                  \
 108     X(typeof,     1, 0,0)                  \
 109     X(typeofid,   1, 0,0)                  \
 110     X(typeofident,1, 0,0)                  \
 111     X(refval,     1, 0,0)                  \
 112     X(ret,        0, 0,0)                  \
 113     X(sub,        1, 0,0)                  \
 114     X(undefined,  1, 0,0)                  \
 115     X(var_set,    1, ARG_BSTR,   0)        \
 116     X(void,       1, 0,0)                  \
 117     X(xor,        1, 0,0)
 118
 119 typedef enum {
 120 #define X(x,a,b,c) OP_##x,
 121 OP_LIST
 122 #undef X
 123     OP_LAST
 124 } jsop_t;
 125
 126 typedef union {
 127     BSTR bstr;
 128     double *dbl;
 129     LONG lng;
 130     WCHAR *str;
 131     unsigned uint;
 132     function_expression_t *func; /* FIXME */
 133 } instr_arg_t;
 134
 135 typedef enum {
 136     ARG_NONE = 0,
 137     ARG_ADDR,
 138     ARG_BSTR,
 139     ARG_DBL,
 140     ARG_FUNC,
 141     ARG_INT,
 142     ARG_STR,
 143     ARG_UINT
 144 } instr_arg_type_t;
 145
 146 typedef struct {
 147     jsop_t op;
 148     instr_arg_t arg1;
 149     instr_arg_t arg2;
 150 } instr_t;
 151
 152 typedef struct {
 153     instr_t *instrs;
 154     jsheap_t heap;
 155
 156     BSTR *bstr_pool;
 157     unsigned bstr_pool_size;
 158     unsigned bstr_cnt;
 159 } bytecode_t;
 160
 161 void release_bytecode(bytecode_t*);
 162
 163 typedef struct _compiler_ctx_t compiler_ctx_t;
 164
 165 void release_compiler(compiler_ctx_t*);
 166
 167 typedef struct _parser_ctx_t {
 168     LONG ref;
 169
 170     WCHAR *begin;
 171     const WCHAR *end;
 172     const WCHAR *ptr;
 173
 174     script_ctx_t *script;
 175     source_elements_t *source;
 176     BOOL nl;
 177     BOOL is_html;
 178     BOOL lexer_error;
 179     HRESULT hres;
 180
 181     jsheap_t heap;
 182
 183     func_stack_t *func_stack;
 184
 185     bytecode_t *code;
 186     compiler_ctx_t *compiler;
 187
 188     struct _parser_ctx_t *next;
 189 } parser_ctx_t;
 190
 191 HRESULT script_parse(script_ctx_t*,const WCHAR*,const WCHAR*,parser_ctx_t**) DECLSPEC_HIDDEN;
 192 void parser_release(parser_ctx_t*) DECLSPEC_HIDDEN;
 193
 194 int parser_lex(void*,parser_ctx_t*) DECLSPEC_HIDDEN;
 195
 196 static inline void parser_addref(parser_ctx_t *ctx)
 197 {
 198     ctx->ref++;
 199 }
 200
 201 static inline void *parser_alloc(parser_ctx_t *ctx, DWORD size)
 202 {
 203     return jsheap_alloc(&ctx->heap, size);
 204 }
 205
 206 static inline void *parser_alloc_tmp(parser_ctx_t *ctx, DWORD size)
 207 {
 208     return jsheap_alloc(&ctx->script->tmp_heap, size);
 209 }
 210
 211 typedef struct _scope_chain_t {
 212     LONG ref;
 213     jsdisp_t *obj;
 214     struct _scope_chain_t *next;
 215 } scope_chain_t;
 216
 217 HRESULT scope_push(scope_chain_t*,jsdisp_t*,scope_chain_t**) DECLSPEC_HIDDEN;
 218 void scope_release(scope_chain_t*) DECLSPEC_HIDDEN;
 219
 220 static inline void scope_addref(scope_chain_t *scope)
 221 {
 222     scope->ref++;
 223 }
 224
 225 typedef struct _except_frame_t except_frame_t;
 226
 227 struct _exec_ctx_t {
 228     LONG ref;
 229
 230     parser_ctx_t *parser;
 231     scope_chain_t *scope_chain;
 232     jsdisp_t *var_disp;
 233     IDispatch *this_obj;
 234     BOOL is_global;
 235
 236     VARIANT *stack;
 237     unsigned stack_size;
 238     unsigned top;
 239     except_frame_t *except_frame;
 240
 241     unsigned ip;
 242     jsexcept_t *ei;
 243 };
 244
 245 static inline void exec_addref(exec_ctx_t *ctx)
 246 {
 247     ctx->ref++;
 248 }
 249
 250 void exec_release(exec_ctx_t*) DECLSPEC_HIDDEN;
 251 HRESULT create_exec_ctx(script_ctx_t*,IDispatch*,jsdisp_t*,scope_chain_t*,BOOL,exec_ctx_t**) DECLSPEC_HIDDEN;
 252 HRESULT exec_source(exec_ctx_t*,parser_ctx_t*,source_elements_t*,BOOL,jsexcept_t*,VARIANT*) DECLSPEC_HIDDEN;
 253
 254 typedef struct _parameter_t parameter_t;
 255
 256 HRESULT create_source_function(parser_ctx_t*,parameter_t*,source_elements_t*,scope_chain_t*,
 257         const WCHAR*,DWORD,jsdisp_t**) DECLSPEC_HIDDEN;
 258
 259 typedef enum {
 260     LT_INT,
 261     LT_DOUBLE,
 262     LT_STRING,
 263     LT_BOOL,
 264     LT_NULL,
 265     LT_REGEXP
 266 }literal_type_t;
 267
 268 typedef struct {
 269     literal_type_t type;
 270     union {
 271         LONG lval;
 272         double dval;
 273         const WCHAR *wstr;
 274         VARIANT_BOOL bval;
 275         struct {
 276             const WCHAR *str;
 277             DWORD str_len;
 278             DWORD flags;
 279         } regexp;
 280     } u;
 281 } literal_t;
 282
 283 literal_t *parse_regexp(parser_ctx_t*) DECLSPEC_HIDDEN;
 284 literal_t *new_boolean_literal(parser_ctx_t*,VARIANT_BOOL) DECLSPEC_HIDDEN;
 285
 286 typedef struct _variable_declaration_t {
 287     const WCHAR *identifier;
 288     expression_t *expr;
 289
 290     struct _variable_declaration_t *next;
 291 } variable_declaration_t;
 292
 293 typedef enum {
 294     STAT_BLOCK,
 295     STAT_BREAK,
 296     STAT_CONTINUE,
 297     STAT_EMPTY,
 298     STAT_EXPR,
 299     STAT_FOR,
 300     STAT_FORIN,
 301     STAT_IF,
 302     STAT_LABEL,
 303     STAT_RETURN,
 304     STAT_SWITCH,
 305     STAT_THROW,
 306     STAT_TRY,
 307     STAT_VAR,
 308     STAT_WHILE,
 309     STAT_WITH
 310 } statement_type_t;
 311
 312 struct _statement_t {
 313     statement_type_t type;
 314     statement_t *next;
 315 };
 316
 317 typedef struct {
 318     statement_t stat;
 319     statement_t *stat_list;
 320 } block_statement_t;
 321
 322 typedef struct {
 323     statement_t stat;
 324     variable_declaration_t *variable_list;
 325 } var_statement_t;
 326
 327 typedef struct {
 328     statement_t stat;
 329     expression_t *expr;
 330 } expression_statement_t;
 331
 332 typedef struct {
 333     statement_t stat;
 334     expression_t *expr;
 335     statement_t *if_stat;
 336     statement_t *else_stat;
 337 } if_statement_t;
 338
 339 typedef struct {
 340     statement_t stat;
 341     BOOL do_while;
 342     expression_t *expr;
 343     statement_t *statement;
 344 } while_statement_t;
 345
 346 typedef struct {
 347     statement_t stat;
 348     variable_declaration_t *variable_list;
 349     expression_t *begin_expr;
 350     expression_t *expr;
 351     expression_t *end_expr;
 352     statement_t *statement;
 353 } for_statement_t;
 354
 355 typedef struct {
 356     statement_t stat;
 357     variable_declaration_t *variable;
 358     expression_t *expr;
 359     expression_t *in_expr;
 360     statement_t *statement;
 361 } forin_statement_t;
 362
 363 typedef struct {
 364     statement_t stat;
 365     const WCHAR *identifier;
 366 } branch_statement_t;
 367
 368 typedef struct {
 369     statement_t stat;
 370     expression_t *expr;
 371     statement_t *statement;
 372 } with_statement_t;
 373
 374 typedef struct {
 375     statement_t stat;
 376     const WCHAR *identifier;
 377     statement_t *statement;
 378 } labelled_statement_t;
 379
 380 typedef struct _case_clausule_t {
 381     expression_t *expr;
 382     statement_t *stat;
 383
 384     struct _case_clausule_t *next;
 385 } case_clausule_t;
 386
 387 typedef struct {
 388     statement_t stat;
 389     expression_t *expr;
 390     case_clausule_t *case_list;
 391 } switch_statement_t;
 392
 393 typedef struct {
 394     const WCHAR *identifier;
 395     statement_t *statement;
 396 } catch_block_t;
 397
 398 typedef struct {
 399     statement_t stat;
 400     statement_t *try_statement;
 401     catch_block_t *catch_block;
 402     statement_t *finally_statement;
 403 } try_statement_t;
 404
 405 typedef struct {
 406     enum {
 407         EXPRVAL_VARIANT,
 408         EXPRVAL_IDREF,
 409         EXPRVAL_INVALID
 410     } type;
 411     union {
 412         VARIANT var;
 413         struct {
 414             IDispatch *disp;
 415             DISPID id;
 416         } idref;
 417     } u;
 418 } exprval_t;
 419
 420 typedef enum {
 421      EXPR_COMMA,
 422      EXPR_OR,
 423      EXPR_AND,
 424      EXPR_BOR,
 425      EXPR_BXOR,
 426      EXPR_BAND,
 427      EXPR_INSTANCEOF,
 428      EXPR_IN,
 429      EXPR_ADD,
 430      EXPR_SUB,
 431      EXPR_MUL,
 432      EXPR_DIV,
 433      EXPR_MOD,
 434      EXPR_DELETE,
 435      EXPR_VOID,
 436      EXPR_TYPEOF,
 437      EXPR_MINUS,
 438      EXPR_PLUS,
 439      EXPR_POSTINC,
 440      EXPR_POSTDEC,
 441      EXPR_PREINC,
 442      EXPR_PREDEC,
 443      EXPR_EQ,
 444      EXPR_EQEQ,
 445      EXPR_NOTEQ,
 446      EXPR_NOTEQEQ,
 447      EXPR_LESS,
 448      EXPR_LESSEQ,
 449      EXPR_GREATER,
 450      EXPR_GREATEREQ,
 451      EXPR_BITNEG,
 452      EXPR_LOGNEG,
 453      EXPR_LSHIFT,
 454      EXPR_RSHIFT,
 455      EXPR_RRSHIFT,
 456      EXPR_ASSIGN,
 457      EXPR_ASSIGNLSHIFT,
 458      EXPR_ASSIGNRSHIFT,
 459      EXPR_ASSIGNRRSHIFT,
 460      EXPR_ASSIGNADD,
 461      EXPR_ASSIGNSUB,
 462      EXPR_ASSIGNMUL,
 463      EXPR_ASSIGNDIV,
 464      EXPR_ASSIGNMOD,
 465      EXPR_ASSIGNAND,
 466      EXPR_ASSIGNOR,
 467      EXPR_ASSIGNXOR,
 468      EXPR_COND,
 469      EXPR_ARRAY,
 470      EXPR_MEMBER,
 471      EXPR_NEW,
 472      EXPR_CALL,
 473      EXPR_THIS,
 474      EXPR_FUNC,
 475      EXPR_IDENT,
 476      EXPR_ARRAYLIT,
 477      EXPR_PROPVAL,
 478      EXPR_LITERAL
 479 } expression_type_t;
 480
 481 struct _expression_t {
 482     expression_type_t type;
 483 };
 484
 485 struct _parameter_t {
 486     const WCHAR *identifier;
 487
 488     struct _parameter_t *next;
 489 };
 490
 491 struct _source_elements_t {
 492     statement_t *statement;
 493     statement_t *statement_tail;
 494     function_declaration_t *functions;
 495     var_list_t *variables;
 496     unsigned instr_off;
 497 };
 498
 499 struct _function_expression_t {
 500     expression_t expr;
 501     const WCHAR *identifier;
 502     parameter_t *parameter_list;
 503     source_elements_t *source_elements;
 504     const WCHAR *src_str;
 505     DWORD src_len;
 506 };
 507
 508 typedef struct {
 509     expression_t expr;
 510     expression_t *expression1;
 511     expression_t *expression2;
 512 } binary_expression_t;
 513
 514 typedef struct {
 515     expression_t expr;
 516     expression_t *expression;
 517 } unary_expression_t;
 518
 519 typedef struct {
 520     expression_t expr;
 521     expression_t *expression;
 522     expression_t *true_expression;
 523     expression_t *false_expression;
 524 } conditional_expression_t;
 525
 526 typedef struct {
 527     expression_t expr;
 528     expression_t *expression;
 529     const WCHAR *identifier;
 530 } member_expression_t;
 531
 532 typedef struct _argument_t {
 533     expression_t *expr;
 534
 535     struct _argument_t *next;
 536 } argument_t;
 537
 538 typedef struct {
 539     expression_t expr;
 540     expression_t *expression;
 541     argument_t *argument_list;
 542 } call_expression_t;
 543
 544 typedef struct {
 545     expression_t expr;
 546     const WCHAR *identifier;
 547 } identifier_expression_t;
 548
 549 typedef struct {
 550     expression_t expr;
 551     literal_t *literal;
 552 } literal_expression_t;
 553
 554 typedef struct _array_element_t {
 555     int elision;
 556     expression_t *expr;
 557
 558     struct _array_element_t *next;
 559 } array_element_t;
 560
 561 typedef struct {
 562     expression_t expr;
 563     array_element_t *element_list;
 564     int length;
 565 } array_literal_expression_t;
 566
 567 typedef struct _prop_val_t {
 568     literal_t *name;
 569     expression_t *value;
 570
 571     struct _prop_val_t *next;
 572 } prop_val_t;
 573
 574 typedef struct {
 575     expression_t expr;
 576     prop_val_t *property_list;
 577 } property_value_expression_t;
 578
 579 HRESULT compile_subscript_stat(parser_ctx_t*,statement_t*,BOOL,unsigned*) DECLSPEC_HIDDEN;