dlls/vbscript/compile.c

   1 /*
   2  * Copyright 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 #include <assert.h>
  20
  21 #include "vbscript.h"
  22 #include "parse.h"
  23 #include "parser.tab.h"
  24
  25 #include "wine/debug.h"
  26
  27 WINE_DEFAULT_DEBUG_CHANNEL(vbscript);
  28 WINE_DECLARE_DEBUG_CHANNEL(vbscript_disas);
  29
  30 typedef struct {
  31     parser_ctx_t parser;
  32
  33     unsigned instr_cnt;
  34     unsigned instr_size;
  35     vbscode_t *code;
  36
  37     unsigned *labels;
  38     unsigned labels_size;
  39     unsigned labels_cnt;
  40
  41     unsigned while_end_label;
  42     unsigned sub_end_label;
  43     unsigned func_end_label;
  44     unsigned prop_end_label;
  45
  46     dim_decl_t *dim_decls;
  47     dynamic_var_t *global_vars;
  48
  49     function_t *func;
  50     function_t *funcs;
  51     function_decl_t *func_decls;
  52
  53     class_desc_t *classes;
  54 } compile_ctx_t;
  55
  56 static HRESULT compile_expression(compile_ctx_t*,expression_t*);
  57 static HRESULT compile_statement(compile_ctx_t*,statement_t*);
  58
  59 static const struct {
  60     const char *op_str;
  61     instr_arg_type_t arg1_type;
  62     instr_arg_type_t arg2_type;
  63 } instr_info[] = {
  64 #define X(n,a,b,c) {#n,b,c},
  65 OP_LIST
  66 #undef X
  67 };
  68
  69 static void dump_instr_arg(instr_arg_type_t type, instr_arg_t *arg)
  70 {
  71     switch(type) {
  72     case ARG_STR:
  73     case ARG_BSTR:
  74         TRACE_(vbscript_disas)("\t%s", debugstr_w(arg->str));
  75         break;
  76     case ARG_INT:
  77         TRACE_(vbscript_disas)("\t%d", arg->uint);
  78         break;
  79     case ARG_UINT:
  80     case ARG_ADDR:
  81         TRACE_(vbscript_disas)("\t%u", arg->uint);
  82         break;
  83     case ARG_DOUBLE:
  84         TRACE_(vbscript_disas)("\t%lf", *arg->dbl);
  85         break;
  86     case ARG_NONE:
  87         break;
  88     default:
  89         assert(0);
  90     }
  91 }
  92
  93 static void dump_code(compile_ctx_t *ctx)
  94 {
  95     instr_t *instr;
  96
  97     for(instr = ctx->code->instrs; instr < ctx->code->instrs+ctx->instr_cnt; instr++) {
  98         TRACE_(vbscript_disas)("%d:\t%s", (int)(instr-ctx->code->instrs), instr_info[instr->op].op_str);
  99         dump_instr_arg(instr_info[instr->op].arg1_type, &instr->arg1);
 100         dump_instr_arg(instr_info[instr->op].arg2_type, &instr->arg2);
 101         TRACE_(vbscript_disas)("\n");
 102     }
 103 }
 104
 105 static inline void *compiler_alloc(vbscode_t *vbscode, size_t size)
 106 {
 107     return vbsheap_alloc(&vbscode->heap, size);
 108 }
 109
 110 static WCHAR *compiler_alloc_string(vbscode_t *vbscode, const WCHAR *str)
 111 {
 112     size_t size;
 113     WCHAR *ret;
 114
 115     size = (strlenW(str)+1)*sizeof(WCHAR);
 116     ret = compiler_alloc(vbscode, size);
 117     if(ret)
 118         memcpy(ret, str, size);
 119     return ret;
 120 }
 121
 122 static inline instr_t *instr_ptr(compile_ctx_t *ctx, unsigned id)
 123 {
 124     assert(id < ctx->instr_cnt);
 125     return ctx->code->instrs + id;
 126 }
 127
 128 static unsigned push_instr(compile_ctx_t *ctx, vbsop_t op)
 129 {
 130     assert(ctx->instr_size && ctx->instr_size >= ctx->instr_cnt);
 131
 132     if(ctx->instr_size == ctx->instr_cnt) {
 133         instr_t *new_instr;
 134
 135         new_instr = heap_realloc(ctx->code->instrs, ctx->instr_size*2*sizeof(instr_t));
 136         if(!new_instr)
 137             return -1;
 138
 139         ctx->code->instrs = new_instr;
 140         ctx->instr_size *= 2;
 141     }
 142
 143     ctx->code->instrs[ctx->instr_cnt].op = op;
 144     return ctx->instr_cnt++;
 145 }
 146
 147 static HRESULT push_instr_int(compile_ctx_t *ctx, vbsop_t op, LONG arg)
 148 {
 149     unsigned ret;
 150
 151     ret = push_instr(ctx, op);
 152     if(ret == -1)
 153         return E_OUTOFMEMORY;
 154
 155     instr_ptr(ctx, ret)->arg1.lng = arg;
 156     return S_OK;
 157 }
 158
 159 static HRESULT push_instr_addr(compile_ctx_t *ctx, vbsop_t op, unsigned arg)
 160 {
 161     unsigned ret;
 162
 163     ret = push_instr(ctx, op);
 164     if(ret == -1)
 165         return E_OUTOFMEMORY;
 166
 167     instr_ptr(ctx, ret)->arg1.uint = arg;
 168     return S_OK;
 169 }
 170
 171 static HRESULT push_instr_str(compile_ctx_t *ctx, vbsop_t op, const WCHAR *arg)
 172 {
 173     unsigned instr;
 174     WCHAR *str;
 175
 176     str = compiler_alloc_string(ctx->code, arg);
 177     if(!str)
 178         return E_OUTOFMEMORY;
 179
 180     instr = push_instr(ctx, op);
 181     if(instr == -1)
 182         return E_OUTOFMEMORY;
 183
 184     instr_ptr(ctx, instr)->arg1.str = str;
 185     return S_OK;
 186 }
 187
 188 static HRESULT push_instr_double(compile_ctx_t *ctx, vbsop_t op, double arg)
 189 {
 190     unsigned instr;
 191     double *d;
 192
 193     d = compiler_alloc(ctx->code, sizeof(double));
 194     if(!d)
 195         return E_OUTOFMEMORY;
 196
 197     instr = push_instr(ctx, op);
 198     if(instr == -1)
 199         return E_OUTOFMEMORY;
 200
 201     *d = arg;
 202     instr_ptr(ctx, instr)->arg1.dbl = d;
 203     return S_OK;
 204 }
 205
 206 static BSTR alloc_bstr_arg(compile_ctx_t *ctx, const WCHAR *str)
 207 {
 208     if(!ctx->code->bstr_pool_size) {
 209         ctx->code->bstr_pool = heap_alloc(8 * sizeof(BSTR));
 210         if(!ctx->code->bstr_pool)
 211             return NULL;
 212         ctx->code->bstr_pool_size = 8;
 213     }else if(ctx->code->bstr_pool_size == ctx->code->bstr_cnt) {
 214         BSTR *new_pool;
 215
 216         new_pool = heap_realloc(ctx->code->bstr_pool, ctx->code->bstr_pool_size*2*sizeof(BSTR));
 217         if(!new_pool)
 218             return NULL;
 219
 220         ctx->code->bstr_pool = new_pool;
 221         ctx->code->bstr_pool_size *= 2;
 222     }
 223
 224     ctx->code->bstr_pool[ctx->code->bstr_cnt] = SysAllocString(str);
 225     if(!ctx->code->bstr_pool[ctx->code->bstr_cnt])
 226         return NULL;
 227
 228     return ctx->code->bstr_pool[ctx->code->bstr_cnt++];
 229 }
 230
 231 static HRESULT push_instr_bstr(compile_ctx_t *ctx, vbsop_t op, const WCHAR *arg)
 232 {
 233     unsigned instr;
 234     BSTR bstr;
 235
 236     bstr = alloc_bstr_arg(ctx, arg);
 237     if(!bstr)
 238         return E_OUTOFMEMORY;
 239
 240     instr = push_instr(ctx, op);
 241     if(instr == -1)
 242         return E_OUTOFMEMORY;
 243
 244     instr_ptr(ctx, instr)->arg1.bstr = bstr;
 245     return S_OK;
 246 }
 247
 248 static HRESULT push_instr_bstr_uint(compile_ctx_t *ctx, vbsop_t op, const WCHAR *arg1, unsigned arg2)
 249 {
 250     unsigned instr;
 251     BSTR bstr;
 252
 253     bstr = alloc_bstr_arg(ctx, arg1);
 254     if(!bstr)
 255         return E_OUTOFMEMORY;
 256
 257     instr = push_instr(ctx, op);
 258     if(instr == -1)
 259         return E_OUTOFMEMORY;
 260
 261     instr_ptr(ctx, instr)->arg1.bstr = bstr;
 262     instr_ptr(ctx, instr)->arg2.uint = arg2;
 263     return S_OK;
 264 }
 265
 266 #define LABEL_FLAG 0x80000000
 267
 268 static unsigned alloc_label(compile_ctx_t *ctx)
 269 {
 270     if(!ctx->labels_size) {
 271         ctx->labels = heap_alloc(8 * sizeof(*ctx->labels));
 272         if(!ctx->labels)
 273             return -1;
 274         ctx->labels_size = 8;
 275     }else if(ctx->labels_size == ctx->labels_cnt) {
 276         unsigned *new_labels;
 277
 278         new_labels = heap_realloc(ctx->labels, 2*ctx->labels_size*sizeof(*ctx->labels));
 279         if(!new_labels)
 280             return -1;
 281
 282         ctx->labels = new_labels;
 283         ctx->labels_size *= 2;
 284     }
 285
 286     return ctx->labels_cnt++ | LABEL_FLAG;
 287 }
 288
 289 static inline void label_set_addr(compile_ctx_t *ctx, unsigned label)
 290 {
 291     assert(label & LABEL_FLAG);
 292     ctx->labels[label & ~LABEL_FLAG] = ctx->instr_cnt;
 293 }
 294
 295 static HRESULT compile_args(compile_ctx_t *ctx, expression_t *args, unsigned *ret)
 296 {
 297     unsigned arg_cnt = 0;
 298     HRESULT hres;
 299
 300     while(args) {
 301         hres = compile_expression(ctx, args);
 302         if(FAILED(hres))
 303             return hres;
 304
 305         arg_cnt++;
 306         args = args->next;
 307     }
 308
 309     *ret = arg_cnt;
 310     return S_OK;
 311 }
 312
 313 static HRESULT compile_member_expression(compile_ctx_t *ctx, member_expression_t *expr, BOOL ret_val)
 314 {
 315     unsigned arg_cnt = 0;
 316     HRESULT hres;
 317
 318     hres = compile_args(ctx, expr->args, &arg_cnt);
 319     if(FAILED(hres))
 320         return hres;
 321
 322     if(expr->obj_expr) {
 323         hres = compile_expression(ctx, expr->obj_expr);
 324         if(FAILED(hres))
 325             return hres;
 326
 327         hres = push_instr_bstr_uint(ctx, ret_val ? OP_mcall : OP_mcallv, expr->identifier, arg_cnt);
 328     }else {
 329         hres = push_instr_bstr_uint(ctx, ret_val ? OP_icall : OP_icallv, expr->identifier, arg_cnt);
 330     }
 331
 332     return hres;
 333 }
 334
 335 static HRESULT compile_unary_expression(compile_ctx_t *ctx, unary_expression_t *expr, vbsop_t op)
 336 {
 337     HRESULT hres;
 338
 339     hres = compile_expression(ctx, expr->subexpr);
 340     if(FAILED(hres))
 341         return hres;
 342
 343     return push_instr(ctx, op) == -1 ? E_OUTOFMEMORY : S_OK;
 344 }
 345
 346 static HRESULT compile_binary_expression(compile_ctx_t *ctx, binary_expression_t *expr, vbsop_t op)
 347 {
 348     HRESULT hres;
 349
 350     hres = compile_expression(ctx, expr->left);
 351     if(FAILED(hres))
 352         return hres;
 353
 354     hres = compile_expression(ctx, expr->right);
 355     if(FAILED(hres))
 356         return hres;
 357
 358     return push_instr(ctx, op) == -1 ? E_OUTOFMEMORY : S_OK;
 359 }
 360
 361 static HRESULT compile_expression(compile_ctx_t *ctx, expression_t *expr)
 362 {
 363     switch(expr->type) {
 364     case EXPR_ADD:
 365         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_add);
 366     case EXPR_AND:
 367         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_and);
 368     case EXPR_BOOL:
 369         return push_instr_int(ctx, OP_bool, ((bool_expression_t*)expr)->value);
 370     case EXPR_CONCAT:
 371         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_concat);
 372     case EXPR_DIV:
 373         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_div);
 374     case EXPR_DOUBLE:
 375         return push_instr_double(ctx, OP_double, ((double_expression_t*)expr)->value);
 376     case EXPR_EMPTY:
 377         return push_instr(ctx, OP_empty) != -1 ? S_OK : E_OUTOFMEMORY;
 378     case EXPR_EQUAL:
 379         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_equal);
 380     case EXPR_EQV:
 381         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_eqv);
 382     case EXPR_EXP:
 383         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_exp);
 384     case EXPR_IDIV:
 385         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_idiv);
 386     case EXPR_IMP:
 387         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_imp);
 388     case EXPR_MEMBER:
 389         return compile_member_expression(ctx, (member_expression_t*)expr, TRUE);
 390     case EXPR_MOD:
 391         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_mod);
 392     case EXPR_MUL:
 393         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_mul);
 394     case EXPR_NEG:
 395         return compile_unary_expression(ctx, (unary_expression_t*)expr, OP_neg);
 396     case EXPR_NEQUAL:
 397         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_nequal);
 398     case EXPR_NEW:
 399         return push_instr_str(ctx, OP_new, ((string_expression_t*)expr)->value);
 400     case EXPR_NOT:
 401         return compile_unary_expression(ctx, (unary_expression_t*)expr, OP_not);
 402     case EXPR_NOTHING:
 403         return push_instr(ctx, OP_nothing) != -1 ? S_OK : E_OUTOFMEMORY;
 404     case EXPR_NULL:
 405         return push_instr(ctx, OP_null) != -1 ? S_OK : E_OUTOFMEMORY;
 406     case EXPR_OR:
 407         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_or);
 408     case EXPR_STRING:
 409         return push_instr_str(ctx, OP_string, ((string_expression_t*)expr)->value);
 410     case EXPR_SUB:
 411         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_sub);
 412     case EXPR_USHORT:
 413         return push_instr_int(ctx, OP_short, ((int_expression_t*)expr)->value);
 414     case EXPR_ULONG:
 415         return push_instr_int(ctx, OP_long, ((int_expression_t*)expr)->value);
 416     case EXPR_XOR:
 417         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_xor);
 418     default:
 419         FIXME("Unimplemented expression type %d\n", expr->type);
 420         return E_NOTIMPL;
 421     }
 422
 423     return S_OK;
 424 }
 425
 426 static HRESULT compile_if_statement(compile_ctx_t *ctx, if_statement_t *stat)
 427 {
 428     unsigned cnd_jmp, endif_label = -1;
 429     elseif_decl_t *elseif_decl;
 430     HRESULT hres;
 431
 432     hres = compile_expression(ctx, stat->expr);
 433     if(FAILED(hres))
 434         return hres;
 435
 436     cnd_jmp = push_instr(ctx, OP_jmp_false);
 437     if(cnd_jmp == -1)
 438         return E_OUTOFMEMORY;
 439
 440     hres = compile_statement(ctx, stat->if_stat);
 441     if(FAILED(hres))
 442         return hres;
 443
 444     if(stat->else_stat || stat->elseifs) {
 445         endif_label = alloc_label(ctx);
 446         if(endif_label == -1)
 447             return E_OUTOFMEMORY;
 448
 449         hres = push_instr_addr(ctx, OP_jmp, endif_label);
 450         if(FAILED(hres))
 451             return hres;
 452     }
 453
 454     for(elseif_decl = stat->elseifs; elseif_decl; elseif_decl = elseif_decl->next) {
 455         instr_ptr(ctx, cnd_jmp)->arg1.uint = ctx->instr_cnt;
 456
 457         hres = compile_expression(ctx, elseif_decl->expr);
 458         if(FAILED(hres))
 459             return hres;
 460
 461         cnd_jmp = push_instr(ctx, OP_jmp_false);
 462         if(cnd_jmp == -1)
 463             return E_OUTOFMEMORY;
 464
 465         hres = compile_statement(ctx, elseif_decl->stat);
 466         if(FAILED(hres))
 467             return hres;
 468
 469         hres = push_instr_addr(ctx, OP_jmp, endif_label);
 470         if(FAILED(hres))
 471             return hres;
 472     }
 473
 474     instr_ptr(ctx, cnd_jmp)->arg1.uint = ctx->instr_cnt;
 475
 476     if(stat->else_stat) {
 477         hres = compile_statement(ctx, stat->else_stat);
 478         if(FAILED(hres))
 479             return hres;
 480     }
 481
 482     if(endif_label != -1)
 483         label_set_addr(ctx, endif_label);
 484     return S_OK;
 485 }
 486
 487 static HRESULT compile_while_statement(compile_ctx_t *ctx, while_statement_t *stat)
 488 {
 489     unsigned start_addr, prev_label;
 490     unsigned jmp_end;
 491     HRESULT hres;
 492
 493     start_addr = ctx->instr_cnt;
 494
 495     hres = compile_expression(ctx, stat->expr);
 496     if(FAILED(hres))
 497         return hres;
 498
 499     jmp_end = push_instr(ctx, stat->stat.type == STAT_UNTIL ? OP_jmp_true : OP_jmp_false);
 500     if(jmp_end == -1)
 501         return E_OUTOFMEMORY;
 502
 503     if(stat->stat.type != STAT_WHILE) {
 504         prev_label = ctx->while_end_label;
 505         if((ctx->while_end_label = alloc_label(ctx)) == -1)
 506             return E_OUTOFMEMORY;
 507     }
 508
 509     hres = compile_statement(ctx, stat->body);
 510     if(FAILED(hres))
 511         return hres;
 512
 513     hres = push_instr_addr(ctx, OP_jmp, start_addr);
 514     if(FAILED(hres))
 515         return hres;
 516
 517     instr_ptr(ctx, jmp_end)->arg1.uint = ctx->instr_cnt;
 518
 519     if(stat->stat.type != STAT_WHILE) {
 520         label_set_addr(ctx, ctx->while_end_label);
 521         ctx->while_end_label = prev_label;
 522     }
 523
 524     return S_OK;
 525 }
 526
 527 static HRESULT compile_dowhile_statement(compile_ctx_t *ctx, while_statement_t *stat)
 528 {
 529     unsigned start_addr, prev_label;
 530     HRESULT hres;
 531
 532     start_addr = ctx->instr_cnt;
 533
 534     prev_label = ctx->while_end_label;
 535     if((ctx->while_end_label = alloc_label(ctx)) == -1)
 536         return E_OUTOFMEMORY;
 537
 538     hres = compile_statement(ctx, stat->body);
 539     if(FAILED(hres))
 540         return hres;
 541
 542     hres = compile_expression(ctx, stat->expr);
 543     if(FAILED(hres))
 544         return hres;
 545
 546     hres = push_instr_addr(ctx, stat->stat.type == STAT_DOUNTIL ? OP_jmp_false : OP_jmp_true, start_addr);
 547     if(FAILED(hres))
 548         return hres;
 549
 550     label_set_addr(ctx, ctx->while_end_label);
 551     ctx->while_end_label = prev_label;
 552     return S_OK;
 553 }
 554
 555 static HRESULT compile_assign_statement(compile_ctx_t *ctx, assign_statement_t *stat, BOOL is_set)
 556 {
 557     HRESULT hres;
 558
 559     hres = compile_expression(ctx, stat->value_expr);
 560     if(FAILED(hres))
 561         return hres;
 562
 563     if(stat->member_expr->args) {
 564         FIXME("arguments support not implemented\n");
 565         return E_NOTIMPL;
 566     }
 567
 568     if(stat->member_expr->obj_expr) {
 569         hres = compile_expression(ctx, stat->member_expr->obj_expr);
 570         if(FAILED(hres))
 571             return hres;
 572
 573         hres = push_instr_bstr(ctx, is_set ? OP_set_member : OP_assign_member, stat->member_expr->identifier);
 574     }else {
 575         hres = push_instr_bstr(ctx, is_set ? OP_set_ident : OP_assign_ident, stat->member_expr->identifier);
 576     }
 577
 578     return hres;
 579 }
 580
 581 static BOOL lookup_dim_decls(compile_ctx_t *ctx, const WCHAR *name)
 582 {
 583     dim_decl_t *dim_decl;
 584
 585     for(dim_decl = ctx->dim_decls; dim_decl; dim_decl = dim_decl->next) {
 586         if(!strcmpiW(dim_decl->name, name))
 587             return TRUE;
 588     }
 589
 590     return FALSE;
 591 }
 592
 593 static BOOL lookup_args_name(compile_ctx_t *ctx, const WCHAR *name)
 594 {
 595     unsigned i;
 596
 597     for(i = 0; i < ctx->func->arg_cnt; i++) {
 598         if(!strcmpiW(ctx->func->args[i].name, name))
 599             return TRUE;
 600     }
 601
 602     return FALSE;
 603 }
 604
 605 static HRESULT compile_dim_statement(compile_ctx_t *ctx, dim_statement_t *stat)
 606 {
 607     dim_decl_t *dim_decl = stat->dim_decls;
 608
 609     while(1) {
 610         if(lookup_dim_decls(ctx, dim_decl->name) || lookup_args_name(ctx, dim_decl->name)) {
 611             FIXME("dim %s name redefined\n", debugstr_w(dim_decl->name));
 612             return E_FAIL;
 613         }
 614
 615         if(!dim_decl->next)
 616             break;
 617         dim_decl = dim_decl->next;
 618     }
 619
 620     dim_decl->next = ctx->dim_decls;
 621     ctx->dim_decls = stat->dim_decls;
 622     ctx->func->var_cnt++;
 623     return S_OK;
 624 }
 625
 626 static HRESULT compile_function_statement(compile_ctx_t *ctx, function_statement_t *stat)
 627 {
 628     if(ctx->func != &ctx->code->global_code) {
 629         FIXME("Function is not in the global code\n");
 630         return E_FAIL;
 631     }
 632
 633     stat->func_decl->next = ctx->func_decls;
 634     ctx->func_decls = stat->func_decl;
 635     return S_OK;
 636 }
 637
 638 static HRESULT compile_exitdo_statement(compile_ctx_t *ctx)
 639 {
 640     if(ctx->while_end_label == -1) {
 641         FIXME("Exit Do outside Do Loop\n");
 642         return E_FAIL;
 643     }
 644
 645     return push_instr_addr(ctx, OP_jmp, ctx->while_end_label);
 646 }
 647
 648 static HRESULT compile_exitsub_statement(compile_ctx_t *ctx)
 649 {
 650     if(ctx->sub_end_label == -1) {
 651         FIXME("Exit Sub outside Sub?\n");
 652         return E_FAIL;
 653     }
 654
 655     return push_instr_addr(ctx, OP_jmp, ctx->sub_end_label);
 656 }
 657
 658 static HRESULT compile_exitfunc_statement(compile_ctx_t *ctx)
 659 {
 660     if(ctx->func_end_label == -1) {
 661         FIXME("Exit Function outside Function?\n");
 662         return E_FAIL;
 663     }
 664
 665     return push_instr_addr(ctx, OP_jmp, ctx->func_end_label);
 666 }
 667
 668 static HRESULT compile_exitprop_statement(compile_ctx_t *ctx)
 669 {
 670     if(ctx->prop_end_label == -1) {
 671         FIXME("Exit Property outside Property?\n");
 672         return E_FAIL;
 673     }
 674
 675     return push_instr_addr(ctx, OP_jmp, ctx->prop_end_label);
 676 }
 677
 678 static HRESULT compile_statement(compile_ctx_t *ctx, statement_t *stat)
 679 {
 680     HRESULT hres;
 681
 682     while(stat) {
 683         switch(stat->type) {
 684         case STAT_ASSIGN:
 685             hres = compile_assign_statement(ctx, (assign_statement_t*)stat, FALSE);
 686             break;
 687         case STAT_CALL:
 688             hres = compile_member_expression(ctx, ((call_statement_t*)stat)->expr, FALSE);
 689             break;
 690         case STAT_DIM:
 691             hres = compile_dim_statement(ctx, (dim_statement_t*)stat);
 692             break;
 693         case STAT_DOWHILE:
 694         case STAT_DOUNTIL:
 695             hres = compile_dowhile_statement(ctx, (while_statement_t*)stat);
 696             break;
 697         case STAT_EXITDO:
 698             hres = compile_exitdo_statement(ctx);
 699             break;
 700         case STAT_EXITFUNC:
 701             hres = compile_exitfunc_statement(ctx);
 702             break;
 703         case STAT_EXITPROP:
 704             hres = compile_exitprop_statement(ctx);
 705             break;
 706         case STAT_EXITSUB:
 707             hres = compile_exitsub_statement(ctx);
 708             break;
 709         case STAT_FUNC:
 710             hres = compile_function_statement(ctx, (function_statement_t*)stat);
 711             break;
 712         case STAT_IF:
 713             hres = compile_if_statement(ctx, (if_statement_t*)stat);
 714             break;
 715         case STAT_SET:
 716             hres = compile_assign_statement(ctx, (assign_statement_t*)stat, TRUE);
 717             break;
 718         case STAT_STOP:
 719             hres = push_instr(ctx, OP_stop) == -1 ? E_OUTOFMEMORY : S_OK;
 720             break;
 721         case STAT_UNTIL:
 722         case STAT_WHILE:
 723         case STAT_WHILELOOP:
 724             hres = compile_while_statement(ctx, (while_statement_t*)stat);
 725             break;
 726         default:
 727             FIXME("Unimplemented statement type %d\n", stat->type);
 728             hres = E_NOTIMPL;
 729         }
 730
 731         if(FAILED(hres))
 732             return hres;
 733         stat = stat->next;
 734     }
 735
 736     return S_OK;
 737 }
 738
 739 static void resolve_labels(compile_ctx_t *ctx, unsigned off)
 740 {
 741     instr_t *instr;
 742
 743     for(instr = ctx->code->instrs+off; instr < ctx->code->instrs+ctx->instr_cnt; instr++) {
 744         if(instr_info[instr->op].arg1_type == ARG_ADDR && (instr->arg1.uint & LABEL_FLAG)) {
 745             assert((instr->arg1.uint & ~LABEL_FLAG) < ctx->labels_cnt);
 746             instr->arg1.uint = ctx->labels[instr->arg1.uint & ~LABEL_FLAG];
 747         }
 748         assert(instr_info[instr->op].arg2_type != ARG_ADDR);
 749     }
 750
 751     ctx->labels_cnt = 0;
 752 }
 753
 754 static HRESULT compile_func(compile_ctx_t *ctx, statement_t *stat, function_t *func)
 755 {
 756     HRESULT hres;
 757
 758     func->code_off = ctx->instr_cnt;
 759
 760     ctx->while_end_label = -1;
 761     ctx->sub_end_label = -1;
 762     ctx->func_end_label = -1;
 763     ctx->prop_end_label = -1;
 764
 765     switch(func->type) {
 766     case FUNC_FUNCTION:
 767         ctx->func_end_label = alloc_label(ctx);
 768         if(ctx->func_end_label == -1)
 769             return E_OUTOFMEMORY; /* FIXME ! */
 770         break;
 771     case FUNC_SUB:
 772         ctx->sub_end_label = alloc_label(ctx);
 773         if(ctx->sub_end_label == -1)
 774             return E_OUTOFMEMORY;
 775         break;
 776     case FUNC_PROPGET:
 777     case FUNC_PROPLET:
 778     case FUNC_PROPSET:
 779     case FUNC_DEFGET:
 780         ctx->prop_end_label = alloc_label(ctx);
 781         if(ctx->prop_end_label == -1)
 782             return E_OUTOFMEMORY;
 783         break;
 784     case FUNC_GLOBAL:
 785         break;
 786     }
 787
 788     ctx->func = func;
 789     ctx->dim_decls = NULL;
 790     hres = compile_statement(ctx, stat);
 791     ctx->func = NULL;
 792     if(FAILED(hres))
 793         return hres;
 794
 795     assert(ctx->while_end_label == -1);
 796
 797     if(ctx->sub_end_label != -1)
 798         label_set_addr(ctx, ctx->sub_end_label);
 799     if(ctx->func_end_label != -1)
 800         label_set_addr(ctx, ctx->func_end_label);
 801     if(ctx->prop_end_label != -1)
 802         label_set_addr(ctx, ctx->prop_end_label);
 803
 804     if(push_instr(ctx, OP_ret) == -1)
 805         return E_OUTOFMEMORY;
 806
 807     resolve_labels(ctx, func->code_off);
 808
 809     if(func->var_cnt) {
 810         dim_decl_t *dim_decl;
 811
 812         if(func->type == FUNC_GLOBAL) {
 813             dynamic_var_t *new_var;
 814
 815             func->var_cnt = 0;
 816
 817             for(dim_decl = ctx->dim_decls; dim_decl; dim_decl = dim_decl->next) {
 818                 new_var = compiler_alloc(ctx->code, sizeof(*new_var));
 819                 if(!new_var)
 820                     return E_OUTOFMEMORY;
 821
 822                 new_var->name = compiler_alloc_string(ctx->code, dim_decl->name);
 823                 if(!new_var->name)
 824                     return E_OUTOFMEMORY;
 825
 826                 V_VT(&new_var->v) = VT_EMPTY;
 827
 828                 new_var->next = ctx->global_vars;
 829                 ctx->global_vars = new_var;
 830             }
 831         }else {
 832             unsigned i;
 833
 834             func->vars = compiler_alloc(ctx->code, func->var_cnt * sizeof(var_desc_t));
 835             if(!func->vars)
 836                 return E_OUTOFMEMORY;
 837
 838             for(dim_decl = ctx->dim_decls, i=0; dim_decl; dim_decl = dim_decl->next, i++) {
 839                 func->vars[i].name = compiler_alloc_string(ctx->code, dim_decl->name);
 840                 if(!func->vars[i].name)
 841                     return E_OUTOFMEMORY;
 842             }
 843
 844             assert(i == func->var_cnt);
 845         }
 846     }
 847
 848     return S_OK;
 849 }
 850
 851 static BOOL lookup_funcs_name(compile_ctx_t *ctx, const WCHAR *name)
 852 {
 853     function_t *iter;
 854
 855     for(iter = ctx->funcs; iter; iter = iter->next) {
 856         if(!strcmpiW(iter->name, name))
 857             return TRUE;
 858     }
 859
 860     return FALSE;
 861 }
 862
 863 static HRESULT create_function(compile_ctx_t *ctx, function_decl_t *decl, function_t **ret)
 864 {
 865     function_t *func;
 866     HRESULT hres;
 867
 868     if(lookup_dim_decls(ctx, decl->name) || lookup_funcs_name(ctx, decl->name)) {
 869         FIXME("%s: redefinition\n", debugstr_w(decl->name));
 870         return E_FAIL;
 871     }
 872
 873     func = compiler_alloc(ctx->code, sizeof(*func));
 874     if(!func)
 875         return E_OUTOFMEMORY;
 876
 877     func->name = compiler_alloc_string(ctx->code, decl->name);
 878     if(!func->name)
 879         return E_OUTOFMEMORY;
 880
 881     func->vars = NULL;
 882     func->var_cnt = 0;
 883     func->code_ctx = ctx->code;
 884     func->type = decl->type;
 885     func->is_public = decl->is_public;
 886
 887     func->arg_cnt = 0;
 888     if(decl->args) {
 889         arg_decl_t *arg;
 890         unsigned i;
 891
 892         for(arg = decl->args; arg; arg = arg->next)
 893             func->arg_cnt++;
 894
 895         func->args = compiler_alloc(ctx->code, func->arg_cnt * sizeof(arg_desc_t));
 896         if(!func->args)
 897             return E_OUTOFMEMORY;
 898
 899         for(i = 0, arg = decl->args; arg; arg = arg->next, i++) {
 900             func->args[i].name = compiler_alloc_string(ctx->code, arg->name);
 901             if(!func->args[i].name)
 902                 return E_OUTOFMEMORY;
 903             func->args[i].by_ref = arg->by_ref;
 904         }
 905     }else {
 906         func->args = NULL;
 907     }
 908
 909     hres = compile_func(ctx, decl->body, func);
 910     if(FAILED(hres))
 911         return hres;
 912
 913     *ret = func;
 914     return S_OK;
 915 }
 916
 917 static BOOL lookup_class_name(compile_ctx_t *ctx, const WCHAR *name)
 918 {
 919     class_desc_t *iter;
 920
 921     for(iter = ctx->classes; iter; iter = iter->next) {
 922         if(!strcmpiW(iter->name, name))
 923             return TRUE;
 924     }
 925
 926     return FALSE;
 927 }
 928
 929 static HRESULT create_class_funcprop(compile_ctx_t *ctx, function_decl_t *func_decl, vbdisp_funcprop_desc_t *desc)
 930 {
 931     vbdisp_invoke_type_t invoke_type;
 932     function_decl_t *funcprop_decl;
 933     HRESULT hres;
 934
 935     desc->name = compiler_alloc_string(ctx->code, func_decl->name);
 936     if(!desc->name)
 937         return E_OUTOFMEMORY;
 938
 939     for(funcprop_decl = func_decl; funcprop_decl; funcprop_decl = funcprop_decl->next_prop_func) {
 940         switch(funcprop_decl->type) {
 941         case FUNC_FUNCTION:
 942         case FUNC_SUB:
 943         case FUNC_PROPGET:
 944         case FUNC_DEFGET:
 945             invoke_type = VBDISP_CALLGET;
 946             break;
 947         case FUNC_PROPLET:
 948             invoke_type = VBDISP_LET;
 949             break;
 950         case FUNC_PROPSET:
 951             invoke_type = VBDISP_SET;
 952             break;
 953         default:
 954             assert(0);
 955         }
 956
 957         assert(!desc->entries[invoke_type]);
 958
 959         if(funcprop_decl->is_public)
 960             desc->is_public = TRUE;
 961
 962         hres = create_function(ctx, funcprop_decl, desc->entries+invoke_type);
 963         if(FAILED(hres))
 964             return hres;
 965     }
 966
 967     return S_OK;
 968 }
 969
 970 static BOOL lookup_class_funcs(class_desc_t *class_desc, const WCHAR *name)
 971 {
 972     unsigned i;
 973
 974     for(i=0; i < class_desc->func_cnt; i++) {
 975         if(class_desc->funcs[i].name && !strcmpiW(class_desc->funcs[i].name, name))
 976             return TRUE;
 977     }
 978
 979     return FALSE;
 980 }
 981
 982 static HRESULT compile_class(compile_ctx_t *ctx, class_decl_t *class_decl)
 983 {
 984     function_decl_t *func_decl, *func_prop_decl;
 985     class_prop_decl_t *prop_decl;
 986     class_desc_t *class_desc;
 987     unsigned i;
 988     HRESULT hres;
 989
 990     static const WCHAR class_initializeW[] = {'c','l','a','s','s','_','i','n','i','t','i','a','l','i','z','e',0};
 991     static const WCHAR class_terminateW[] = {'c','l','a','s','s','_','t','e','r','m','i','n','a','t','e',0};
 992
 993     if(lookup_dim_decls(ctx, class_decl->name) || lookup_funcs_name(ctx, class_decl->name)
 994             || lookup_class_name(ctx, class_decl->name)) {
 995         FIXME("%s: redefinition\n", debugstr_w(class_decl->name));
 996         return E_FAIL;
 997     }
 998
 999     class_desc = compiler_alloc(ctx->code, sizeof(*class_desc));
1000     if(!class_desc)
1001         return E_OUTOFMEMORY;
1002
1003     class_desc->name = compiler_alloc_string(ctx->code, class_decl->name);
1004     if(!class_desc->name)
1005         return E_OUTOFMEMORY;
1006
1007     class_desc->func_cnt = 1; /* always allocate slot for default getter */
1008     class_desc->prop_cnt = 0;
1009     class_desc->class_initialize_id = 0;
1010     class_desc->class_terminate_id = 0;
1011
1012     for(func_decl = class_decl->funcs; func_decl; func_decl = func_decl->next) {
1013         for(func_prop_decl = func_decl; func_prop_decl; func_prop_decl = func_prop_decl->next_prop_func) {
1014             if(func_prop_decl->type == FUNC_DEFGET)
1015                 break;
1016         }
1017         if(!func_prop_decl)
1018             class_desc->func_cnt++;
1019     }
1020
1021     class_desc->funcs = compiler_alloc(ctx->code, class_desc->func_cnt*sizeof(*class_desc->funcs));
1022     if(!class_desc->funcs)
1023         return E_OUTOFMEMORY;
1024     memset(class_desc->funcs, 0, class_desc->func_cnt*sizeof(*class_desc->funcs));
1025
1026     for(func_decl = class_decl->funcs, i=1; func_decl; func_decl = func_decl->next, i++) {
1027         for(func_prop_decl = func_decl; func_prop_decl; func_prop_decl = func_prop_decl->next_prop_func) {
1028             if(func_prop_decl->type == FUNC_DEFGET) {
1029                 i--;
1030                 break;
1031             }
1032         }
1033
1034         if(!strcmpiW(class_initializeW, func_decl->name)) {
1035             if(func_decl->type != FUNC_SUB) {
1036                 FIXME("class initializer is not sub\n");
1037                 return E_FAIL;
1038             }
1039
1040             class_desc->class_initialize_id = i;
1041         }else  if(!strcmpiW(class_terminateW, func_decl->name)) {
1042             if(func_decl->type != FUNC_SUB) {
1043                 FIXME("class terminator is not sub\n");
1044                 return E_FAIL;
1045             }
1046
1047             class_desc->class_terminate_id = i;
1048         }
1049
1050         hres = create_class_funcprop(ctx, func_decl, class_desc->funcs + (func_prop_decl ? 0 : i));
1051         if(FAILED(hres))
1052             return hres;
1053     }
1054
1055     for(prop_decl = class_decl->props; prop_decl; prop_decl = prop_decl->next)
1056         class_desc->prop_cnt++;
1057
1058     class_desc->props = compiler_alloc(ctx->code, class_desc->prop_cnt*sizeof(*class_desc->props));
1059     if(!class_desc->props)
1060         return E_OUTOFMEMORY;
1061
1062     for(prop_decl = class_decl->props, i=0; prop_decl; prop_decl = prop_decl->next, i++) {
1063         if(lookup_class_funcs(class_desc, prop_decl->name)) {
1064             FIXME("Property %s redefined\n", debugstr_w(prop_decl->name));
1065             return E_FAIL;
1066         }
1067
1068         class_desc->props[i].name = compiler_alloc_string(ctx->code, prop_decl->name);
1069         if(!class_desc->props[i].name)
1070             return E_OUTOFMEMORY;
1071
1072         class_desc->props[i].is_public = prop_decl->is_public;
1073     }
1074
1075     class_desc->next = ctx->classes;
1076     ctx->classes = class_desc;
1077     return S_OK;
1078 }
1079
1080 static BOOL lookup_script_identifier(script_ctx_t *script, const WCHAR *identifier)
1081 {
1082     class_desc_t *class;
1083     dynamic_var_t *var;
1084     function_t *func;
1085
1086     for(var = script->global_vars; var; var = var->next) {
1087         if(!strcmpiW(var->name, identifier))
1088             return TRUE;
1089     }
1090
1091     for(func = script->global_funcs; func; func = func->next) {
1092         if(!strcmpiW(func->name, identifier))
1093             return TRUE;
1094     }
1095
1096     for(class = script->classes; class; class = class->next) {
1097         if(!strcmpiW(class->name, identifier))
1098             return TRUE;
1099     }
1100
1101     return FALSE;
1102 }
1103
1104 static HRESULT check_script_collisions(compile_ctx_t *ctx, script_ctx_t *script)
1105 {
1106     class_desc_t *class;
1107     dynamic_var_t *var;
1108     function_t *func;
1109
1110     for(var = ctx->global_vars; var; var = var->next) {
1111         if(lookup_script_identifier(script, var->name)) {
1112             FIXME("%s: redefined\n", debugstr_w(var->name));
1113             return E_FAIL;
1114         }
1115     }
1116
1117     for(func = ctx->funcs; func; func = func->next) {
1118         if(lookup_script_identifier(script, func->name)) {
1119             FIXME("%s: redefined\n", debugstr_w(func->name));
1120             return E_FAIL;
1121         }
1122     }
1123
1124     for(class = ctx->classes; class; class = class->next) {
1125         if(lookup_script_identifier(script, class->name)) {
1126             FIXME("%s: redefined\n", debugstr_w(class->name));
1127             return E_FAIL;
1128         }
1129     }
1130
1131     return S_OK;
1132 }
1133
1134 void release_vbscode(vbscode_t *code)
1135 {
1136     unsigned i;
1137
1138     list_remove(&code->entry);
1139
1140     for(i=0; i < code->bstr_cnt; i++)
1141         SysFreeString(code->bstr_pool[i]);
1142
1143     vbsheap_free(&code->heap);
1144
1145     heap_free(code->bstr_pool);
1146     heap_free(code->source);
1147     heap_free(code->instrs);
1148     heap_free(code);
1149 }
1150
1151 static vbscode_t *alloc_vbscode(compile_ctx_t *ctx, const WCHAR *source)
1152 {
1153     vbscode_t *ret;
1154
1155     ret = heap_alloc(sizeof(*ret));
1156     if(!ret)
1157         return NULL;
1158
1159     ret->source = heap_strdupW(source);
1160     if(!ret->source) {
1161         heap_free(ret);
1162         return NULL;
1163     }
1164
1165     ret->instrs = heap_alloc(32*sizeof(instr_t));
1166     if(!ret->instrs) {
1167         release_vbscode(ret);
1168         return NULL;
1169     }
1170
1171     ctx->instr_cnt = 0;
1172     ctx->instr_size = 32;
1173     vbsheap_init(&ret->heap);
1174
1175     ret->option_explicit = ctx->parser.option_explicit;
1176
1177     ret->bstr_pool = NULL;
1178     ret->bstr_pool_size = 0;
1179     ret->bstr_cnt = 0;
1180     ret->global_executed = FALSE;
1181
1182     ret->global_code.type = FUNC_GLOBAL;
1183     ret->global_code.name = NULL;
1184     ret->global_code.code_ctx = ret;
1185     ret->global_code.vars = NULL;
1186     ret->global_code.var_cnt = 0;
1187     ret->global_code.arg_cnt = 0;
1188     ret->global_code.args = NULL;
1189
1190     list_init(&ret->entry);
1191     return ret;
1192 }
1193
1194 static void release_compiler(compile_ctx_t *ctx)
1195 {
1196     parser_release(&ctx->parser);
1197     heap_free(ctx->labels);
1198     if(ctx->code)
1199         release_vbscode(ctx->code);
1200 }
1201
1202 HRESULT compile_script(script_ctx_t *script, const WCHAR *src, vbscode_t **ret)
1203 {
1204     function_t *new_func;
1205     function_decl_t *func_decl;
1206     class_decl_t *class_decl;
1207     compile_ctx_t ctx;
1208     vbscode_t *code;
1209     HRESULT hres;
1210
1211     hres = parse_script(&ctx.parser, src);
1212     if(FAILED(hres))
1213         return hres;
1214
1215     code = ctx.code = alloc_vbscode(&ctx, src);
1216     if(!ctx.code)
1217         return E_OUTOFMEMORY;
1218
1219     ctx.funcs = NULL;
1220     ctx.func_decls = NULL;
1221     ctx.global_vars = NULL;
1222     ctx.dim_decls = NULL;
1223     ctx.classes = NULL;
1224     ctx.labels = NULL;
1225     ctx.labels_cnt = ctx.labels_size = 0;
1226
1227     hres = compile_func(&ctx, ctx.parser.stats, &ctx.code->global_code);
1228     if(FAILED(hres)) {
1229         release_compiler(&ctx);
1230         return hres;
1231     }
1232
1233     for(func_decl = ctx.func_decls; func_decl; func_decl = func_decl->next) {
1234         hres = create_function(&ctx, func_decl, &new_func);
1235         if(FAILED(hres)) {
1236             release_compiler(&ctx);
1237             return hres;
1238         }
1239
1240         new_func->next = ctx.funcs;
1241         ctx.funcs = new_func;
1242     }
1243
1244     for(class_decl = ctx.parser.class_decls; class_decl; class_decl = class_decl->next) {
1245         hres = compile_class(&ctx, class_decl);
1246         if(FAILED(hres)) {
1247             release_compiler(&ctx);
1248             return hres;
1249         }
1250     }
1251
1252     hres = check_script_collisions(&ctx, script);
1253     if(FAILED(hres)) {
1254         release_compiler(&ctx);
1255         return hres;
1256     }
1257
1258     if(ctx.global_vars) {
1259         dynamic_var_t *var;
1260
1261         for(var = ctx.global_vars; var->next; var = var->next);
1262
1263         var->next = script->global_vars;
1264         script->global_vars = ctx.global_vars;
1265     }
1266
1267     if(ctx.funcs) {
1268         for(new_func = ctx.funcs; new_func->next; new_func = new_func->next);
1269
1270         new_func->next = script->global_funcs;
1271         script->global_funcs = ctx.funcs;
1272     }
1273
1274     if(ctx.classes) {
1275         class_desc_t *class = ctx.classes;
1276
1277         while(1) {
1278             class->ctx = script;
1279             if(!class->next)
1280                 break;
1281             class = class->next;
1282         }
1283
1284         class->next = script->classes;
1285         script->classes = ctx.classes;
1286     }
1287
1288     if(TRACE_ON(vbscript_disas))
1289         dump_code(&ctx);
1290
1291     ctx.code = NULL;
1292     release_compiler(&ctx);
1293
1294     list_add_tail(&script->code_list, &code->entry);
1295     *ret = code;
1296     return S_OK;
1297 }