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 for_end_label;
  43     unsigned sub_end_label;
  44     unsigned func_end_label;
  45     unsigned prop_end_label;
  46
  47     dim_decl_t *dim_decls;
  48     dynamic_var_t *global_vars;
  49
  50     const_decl_t *const_decls;
  51     const_decl_t *global_consts;
  52
  53     function_t *func;
  54     function_t *funcs;
  55     function_decl_t *func_decls;
  56
  57     class_desc_t *classes;
  58 } compile_ctx_t;
  59
  60 static HRESULT compile_expression(compile_ctx_t*,expression_t*);
  61 static HRESULT compile_statement(compile_ctx_t*,statement_t*);
  62
  63 static const struct {
  64     const char *op_str;
  65     instr_arg_type_t arg1_type;
  66     instr_arg_type_t arg2_type;
  67 } instr_info[] = {
  68 #define X(n,a,b,c) {#n,b,c},
  69 OP_LIST
  70 #undef X
  71 };
  72
  73 static void dump_instr_arg(instr_arg_type_t type, instr_arg_t *arg)
  74 {
  75     switch(type) {
  76     case ARG_STR:
  77     case ARG_BSTR:
  78         TRACE_(vbscript_disas)("\t%s", debugstr_w(arg->str));
  79         break;
  80     case ARG_INT:
  81         TRACE_(vbscript_disas)("\t%d", arg->uint);
  82         break;
  83     case ARG_UINT:
  84     case ARG_ADDR:
  85         TRACE_(vbscript_disas)("\t%u", arg->uint);
  86         break;
  87     case ARG_DOUBLE:
  88         TRACE_(vbscript_disas)("\t%lf", *arg->dbl);
  89         break;
  90     case ARG_NONE:
  91         break;
  92     default:
  93         assert(0);
  94     }
  95 }
  96
  97 static void dump_code(compile_ctx_t *ctx)
  98 {
  99     instr_t *instr;
 100
 101     for(instr = ctx->code->instrs; instr < ctx->code->instrs+ctx->instr_cnt; instr++) {
 102         TRACE_(vbscript_disas)("%d:\t%s", (int)(instr-ctx->code->instrs), instr_info[instr->op].op_str);
 103         dump_instr_arg(instr_info[instr->op].arg1_type, &instr->arg1);
 104         dump_instr_arg(instr_info[instr->op].arg2_type, &instr->arg2);
 105         TRACE_(vbscript_disas)("\n");
 106     }
 107 }
 108
 109 static inline void *compiler_alloc(vbscode_t *vbscode, size_t size)
 110 {
 111     return vbsheap_alloc(&vbscode->heap, size);
 112 }
 113
 114 static inline void *compiler_alloc_zero(vbscode_t *vbscode, size_t size)
 115 {
 116     void *ret;
 117
 118     ret = vbsheap_alloc(&vbscode->heap, size);
 119     if(ret)
 120         memset(ret, 0, size);
 121     return ret;
 122 }
 123
 124 static WCHAR *compiler_alloc_string(vbscode_t *vbscode, const WCHAR *str)
 125 {
 126     size_t size;
 127     WCHAR *ret;
 128
 129     size = (strlenW(str)+1)*sizeof(WCHAR);
 130     ret = compiler_alloc(vbscode, size);
 131     if(ret)
 132         memcpy(ret, str, size);
 133     return ret;
 134 }
 135
 136 static inline instr_t *instr_ptr(compile_ctx_t *ctx, unsigned id)
 137 {
 138     assert(id < ctx->instr_cnt);
 139     return ctx->code->instrs + id;
 140 }
 141
 142 static unsigned push_instr(compile_ctx_t *ctx, vbsop_t op)
 143 {
 144     assert(ctx->instr_size && ctx->instr_size >= ctx->instr_cnt);
 145
 146     if(ctx->instr_size == ctx->instr_cnt) {
 147         instr_t *new_instr;
 148
 149         new_instr = heap_realloc(ctx->code->instrs, ctx->instr_size*2*sizeof(instr_t));
 150         if(!new_instr)
 151             return 0;
 152
 153         ctx->code->instrs = new_instr;
 154         ctx->instr_size *= 2;
 155     }
 156
 157     ctx->code->instrs[ctx->instr_cnt].op = op;
 158     return ctx->instr_cnt++;
 159 }
 160
 161 static HRESULT push_instr_int(compile_ctx_t *ctx, vbsop_t op, LONG arg)
 162 {
 163     unsigned ret;
 164
 165     ret = push_instr(ctx, op);
 166     if(!ret)
 167         return E_OUTOFMEMORY;
 168
 169     instr_ptr(ctx, ret)->arg1.lng = arg;
 170     return S_OK;
 171 }
 172
 173 static HRESULT push_instr_uint(compile_ctx_t *ctx, vbsop_t op, unsigned arg)
 174 {
 175     unsigned ret;
 176
 177     ret = push_instr(ctx, op);
 178     if(!ret)
 179         return E_OUTOFMEMORY;
 180
 181     instr_ptr(ctx, ret)->arg1.uint = arg;
 182     return S_OK;
 183 }
 184
 185 static HRESULT push_instr_addr(compile_ctx_t *ctx, vbsop_t op, unsigned arg)
 186 {
 187     unsigned ret;
 188
 189     ret = push_instr(ctx, op);
 190     if(!ret)
 191         return E_OUTOFMEMORY;
 192
 193     instr_ptr(ctx, ret)->arg1.uint = arg;
 194     return S_OK;
 195 }
 196
 197 static HRESULT push_instr_str(compile_ctx_t *ctx, vbsop_t op, const WCHAR *arg)
 198 {
 199     unsigned instr;
 200     WCHAR *str;
 201
 202     str = compiler_alloc_string(ctx->code, arg);
 203     if(!str)
 204         return E_OUTOFMEMORY;
 205
 206     instr = push_instr(ctx, op);
 207     if(!instr)
 208         return E_OUTOFMEMORY;
 209
 210     instr_ptr(ctx, instr)->arg1.str = str;
 211     return S_OK;
 212 }
 213
 214 static HRESULT push_instr_double(compile_ctx_t *ctx, vbsop_t op, double arg)
 215 {
 216     unsigned instr;
 217     double *d;
 218
 219     d = compiler_alloc(ctx->code, sizeof(double));
 220     if(!d)
 221         return E_OUTOFMEMORY;
 222
 223     instr = push_instr(ctx, op);
 224     if(!instr)
 225         return E_OUTOFMEMORY;
 226
 227     *d = arg;
 228     instr_ptr(ctx, instr)->arg1.dbl = d;
 229     return S_OK;
 230 }
 231
 232 static BSTR alloc_bstr_arg(compile_ctx_t *ctx, const WCHAR *str)
 233 {
 234     if(!ctx->code->bstr_pool_size) {
 235         ctx->code->bstr_pool = heap_alloc(8 * sizeof(BSTR));
 236         if(!ctx->code->bstr_pool)
 237             return NULL;
 238         ctx->code->bstr_pool_size = 8;
 239     }else if(ctx->code->bstr_pool_size == ctx->code->bstr_cnt) {
 240         BSTR *new_pool;
 241
 242         new_pool = heap_realloc(ctx->code->bstr_pool, ctx->code->bstr_pool_size*2*sizeof(BSTR));
 243         if(!new_pool)
 244             return NULL;
 245
 246         ctx->code->bstr_pool = new_pool;
 247         ctx->code->bstr_pool_size *= 2;
 248     }
 249
 250     ctx->code->bstr_pool[ctx->code->bstr_cnt] = SysAllocString(str);
 251     if(!ctx->code->bstr_pool[ctx->code->bstr_cnt])
 252         return NULL;
 253
 254     return ctx->code->bstr_pool[ctx->code->bstr_cnt++];
 255 }
 256
 257 static HRESULT push_instr_bstr(compile_ctx_t *ctx, vbsop_t op, const WCHAR *arg)
 258 {
 259     unsigned instr;
 260     BSTR bstr;
 261
 262     bstr = alloc_bstr_arg(ctx, arg);
 263     if(!bstr)
 264         return E_OUTOFMEMORY;
 265
 266     instr = push_instr(ctx, op);
 267     if(!instr)
 268         return E_OUTOFMEMORY;
 269
 270     instr_ptr(ctx, instr)->arg1.bstr = bstr;
 271     return S_OK;
 272 }
 273
 274 static HRESULT push_instr_bstr_uint(compile_ctx_t *ctx, vbsop_t op, const WCHAR *arg1, unsigned arg2)
 275 {
 276     unsigned instr;
 277     BSTR bstr;
 278
 279     bstr = alloc_bstr_arg(ctx, arg1);
 280     if(!bstr)
 281         return E_OUTOFMEMORY;
 282
 283     instr = push_instr(ctx, op);
 284     if(!instr)
 285         return E_OUTOFMEMORY;
 286
 287     instr_ptr(ctx, instr)->arg1.bstr = bstr;
 288     instr_ptr(ctx, instr)->arg2.uint = arg2;
 289     return S_OK;
 290 }
 291
 292 #define LABEL_FLAG 0x80000000
 293
 294 static unsigned alloc_label(compile_ctx_t *ctx)
 295 {
 296     if(!ctx->labels_size) {
 297         ctx->labels = heap_alloc(8 * sizeof(*ctx->labels));
 298         if(!ctx->labels)
 299             return 0;
 300         ctx->labels_size = 8;
 301     }else if(ctx->labels_size == ctx->labels_cnt) {
 302         unsigned *new_labels;
 303
 304         new_labels = heap_realloc(ctx->labels, 2*ctx->labels_size*sizeof(*ctx->labels));
 305         if(!new_labels)
 306             return 0;
 307
 308         ctx->labels = new_labels;
 309         ctx->labels_size *= 2;
 310     }
 311
 312     return ctx->labels_cnt++ | LABEL_FLAG;
 313 }
 314
 315 static inline void label_set_addr(compile_ctx_t *ctx, unsigned label)
 316 {
 317     assert(label & LABEL_FLAG);
 318     ctx->labels[label & ~LABEL_FLAG] = ctx->instr_cnt;
 319 }
 320
 321 static expression_t *lookup_const_decls(compile_ctx_t *ctx, const WCHAR *name, BOOL lookup_global)
 322 {
 323     const_decl_t *decl;
 324
 325     for(decl = ctx->const_decls; decl; decl = decl->next) {
 326         if(!strcmpiW(decl->name, name))
 327             return decl->value_expr;
 328     }
 329
 330     if(!lookup_global)
 331         return NULL;
 332
 333     for(decl = ctx->global_consts; decl; decl = decl->next) {
 334         if(!strcmpiW(decl->name, name))
 335             return decl->value_expr;
 336     }
 337
 338     return NULL;
 339 }
 340
 341 static HRESULT compile_args(compile_ctx_t *ctx, expression_t *args, unsigned *ret)
 342 {
 343     unsigned arg_cnt = 0;
 344     HRESULT hres;
 345
 346     while(args) {
 347         hres = compile_expression(ctx, args);
 348         if(FAILED(hres))
 349             return hres;
 350
 351         arg_cnt++;
 352         args = args->next;
 353     }
 354
 355     *ret = arg_cnt;
 356     return S_OK;
 357 }
 358
 359 static HRESULT compile_member_expression(compile_ctx_t *ctx, member_expression_t *expr, BOOL ret_val)
 360 {
 361     unsigned arg_cnt = 0;
 362     HRESULT hres;
 363
 364     if(ret_val && !expr->args) {
 365         expression_t *const_expr;
 366
 367         const_expr = lookup_const_decls(ctx, expr->identifier, TRUE);
 368         if(const_expr)
 369             return compile_expression(ctx, const_expr);
 370     }
 371
 372     hres = compile_args(ctx, expr->args, &arg_cnt);
 373     if(FAILED(hres))
 374         return hres;
 375
 376     if(expr->obj_expr) {
 377         hres = compile_expression(ctx, expr->obj_expr);
 378         if(FAILED(hres))
 379             return hres;
 380
 381         hres = push_instr_bstr_uint(ctx, ret_val ? OP_mcall : OP_mcallv, expr->identifier, arg_cnt);
 382     }else {
 383         hres = push_instr_bstr_uint(ctx, ret_val ? OP_icall : OP_icallv, expr->identifier, arg_cnt);
 384     }
 385
 386     return hres;
 387 }
 388
 389 static HRESULT compile_unary_expression(compile_ctx_t *ctx, unary_expression_t *expr, vbsop_t op)
 390 {
 391     HRESULT hres;
 392
 393     hres = compile_expression(ctx, expr->subexpr);
 394     if(FAILED(hres))
 395         return hres;
 396
 397     return push_instr(ctx, op) ? S_OK : E_OUTOFMEMORY;
 398 }
 399
 400 static HRESULT compile_binary_expression(compile_ctx_t *ctx, binary_expression_t *expr, vbsop_t op)
 401 {
 402     HRESULT hres;
 403
 404     hres = compile_expression(ctx, expr->left);
 405     if(FAILED(hres))
 406         return hres;
 407
 408     hres = compile_expression(ctx, expr->right);
 409     if(FAILED(hres))
 410         return hres;
 411
 412     return push_instr(ctx, op) ? S_OK : E_OUTOFMEMORY;
 413 }
 414
 415 static HRESULT compile_expression(compile_ctx_t *ctx, expression_t *expr)
 416 {
 417     switch(expr->type) {
 418     case EXPR_ADD:
 419         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_add);
 420     case EXPR_AND:
 421         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_and);
 422     case EXPR_BOOL:
 423         return push_instr_int(ctx, OP_bool, ((bool_expression_t*)expr)->value);
 424     case EXPR_CONCAT:
 425         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_concat);
 426     case EXPR_DIV:
 427         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_div);
 428     case EXPR_DOUBLE:
 429         return push_instr_double(ctx, OP_double, ((double_expression_t*)expr)->value);
 430     case EXPR_EMPTY:
 431         return push_instr(ctx, OP_empty) ? S_OK : E_OUTOFMEMORY;
 432     case EXPR_EQUAL:
 433         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_equal);
 434     case EXPR_EQV:
 435         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_eqv);
 436     case EXPR_EXP:
 437         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_exp);
 438     case EXPR_GT:
 439         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_gt);
 440     case EXPR_GTEQ:
 441         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_gteq);
 442     case EXPR_IDIV:
 443         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_idiv);
 444     case EXPR_IS:
 445         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_is);
 446     case EXPR_IMP:
 447         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_imp);
 448     case EXPR_LT:
 449         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_lt);
 450     case EXPR_LTEQ:
 451         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_lteq);
 452     case EXPR_ME:
 453         return push_instr(ctx, OP_me) ? S_OK : E_OUTOFMEMORY;
 454     case EXPR_MEMBER:
 455         return compile_member_expression(ctx, (member_expression_t*)expr, TRUE);
 456     case EXPR_MOD:
 457         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_mod);
 458     case EXPR_MUL:
 459         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_mul);
 460     case EXPR_NEG:
 461         return compile_unary_expression(ctx, (unary_expression_t*)expr, OP_neg);
 462     case EXPR_NEQUAL:
 463         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_nequal);
 464     case EXPR_NEW:
 465         return push_instr_str(ctx, OP_new, ((string_expression_t*)expr)->value);
 466     case EXPR_NOT:
 467         return compile_unary_expression(ctx, (unary_expression_t*)expr, OP_not);
 468     case EXPR_NOTHING:
 469         return push_instr(ctx, OP_nothing) ? S_OK : E_OUTOFMEMORY;
 470     case EXPR_NULL:
 471         return push_instr(ctx, OP_null) ? S_OK : E_OUTOFMEMORY;
 472     case EXPR_OR:
 473         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_or);
 474     case EXPR_STRING:
 475         return push_instr_str(ctx, OP_string, ((string_expression_t*)expr)->value);
 476     case EXPR_SUB:
 477         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_sub);
 478     case EXPR_USHORT:
 479         return push_instr_int(ctx, OP_short, ((int_expression_t*)expr)->value);
 480     case EXPR_ULONG:
 481         return push_instr_int(ctx, OP_long, ((int_expression_t*)expr)->value);
 482     case EXPR_XOR:
 483         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_xor);
 484     default:
 485         FIXME("Unimplemented expression type %d\n", expr->type);
 486         return E_NOTIMPL;
 487     }
 488
 489     return S_OK;
 490 }
 491
 492 static HRESULT compile_if_statement(compile_ctx_t *ctx, if_statement_t *stat)
 493 {
 494     unsigned cnd_jmp, endif_label = 0;
 495     elseif_decl_t *elseif_decl;
 496     HRESULT hres;
 497
 498     hres = compile_expression(ctx, stat->expr);
 499     if(FAILED(hres))
 500         return hres;
 501
 502     cnd_jmp = push_instr(ctx, OP_jmp_false);
 503     if(!cnd_jmp)
 504         return E_OUTOFMEMORY;
 505
 506     hres = compile_statement(ctx, stat->if_stat);
 507     if(FAILED(hres))
 508         return hres;
 509
 510     if(stat->else_stat || stat->elseifs) {
 511         endif_label = alloc_label(ctx);
 512         if(!endif_label)
 513             return E_OUTOFMEMORY;
 514
 515         hres = push_instr_addr(ctx, OP_jmp, endif_label);
 516         if(FAILED(hres))
 517             return hres;
 518     }
 519
 520     for(elseif_decl = stat->elseifs; elseif_decl; elseif_decl = elseif_decl->next) {
 521         instr_ptr(ctx, cnd_jmp)->arg1.uint = ctx->instr_cnt;
 522
 523         hres = compile_expression(ctx, elseif_decl->expr);
 524         if(FAILED(hres))
 525             return hres;
 526
 527         cnd_jmp = push_instr(ctx, OP_jmp_false);
 528         if(!cnd_jmp)
 529             return E_OUTOFMEMORY;
 530
 531         hres = compile_statement(ctx, elseif_decl->stat);
 532         if(FAILED(hres))
 533             return hres;
 534
 535         hres = push_instr_addr(ctx, OP_jmp, endif_label);
 536         if(FAILED(hres))
 537             return hres;
 538     }
 539
 540     instr_ptr(ctx, cnd_jmp)->arg1.uint = ctx->instr_cnt;
 541
 542     if(stat->else_stat) {
 543         hres = compile_statement(ctx, stat->else_stat);
 544         if(FAILED(hres))
 545             return hres;
 546     }
 547
 548     if(endif_label)
 549         label_set_addr(ctx, endif_label);
 550     return S_OK;
 551 }
 552
 553 static HRESULT compile_while_statement(compile_ctx_t *ctx, while_statement_t *stat)
 554 {
 555     unsigned start_addr, prev_label;
 556     unsigned jmp_end;
 557     HRESULT hres;
 558
 559     start_addr = ctx->instr_cnt;
 560
 561     hres = compile_expression(ctx, stat->expr);
 562     if(FAILED(hres))
 563         return hres;
 564
 565     jmp_end = push_instr(ctx, stat->stat.type == STAT_UNTIL ? OP_jmp_true : OP_jmp_false);
 566     if(!jmp_end)
 567         return E_OUTOFMEMORY;
 568
 569     prev_label = ctx->while_end_label;
 570     if(stat->stat.type != STAT_WHILE && !(ctx->while_end_label = alloc_label(ctx)))
 571         return E_OUTOFMEMORY;
 572
 573     hres = compile_statement(ctx, stat->body);
 574     if(FAILED(hres))
 575         return hres;
 576
 577     hres = push_instr_addr(ctx, OP_jmp, start_addr);
 578     if(FAILED(hres))
 579         return hres;
 580
 581     instr_ptr(ctx, jmp_end)->arg1.uint = ctx->instr_cnt;
 582
 583     if(stat->stat.type != STAT_WHILE) {
 584         label_set_addr(ctx, ctx->while_end_label);
 585         ctx->while_end_label = prev_label;
 586     }
 587
 588     return S_OK;
 589 }
 590
 591 static HRESULT compile_dowhile_statement(compile_ctx_t *ctx, while_statement_t *stat)
 592 {
 593     unsigned start_addr, prev_label;
 594     HRESULT hres;
 595
 596     start_addr = ctx->instr_cnt;
 597
 598     prev_label = ctx->while_end_label;
 599     if(!(ctx->while_end_label = alloc_label(ctx)))
 600         return E_OUTOFMEMORY;
 601
 602     hres = compile_statement(ctx, stat->body);
 603     if(FAILED(hres))
 604         return hres;
 605
 606     hres = compile_expression(ctx, stat->expr);
 607     if(FAILED(hres))
 608         return hres;
 609
 610     hres = push_instr_addr(ctx, stat->stat.type == STAT_DOUNTIL ? OP_jmp_false : OP_jmp_true, start_addr);
 611     if(FAILED(hres))
 612         return hres;
 613
 614     label_set_addr(ctx, ctx->while_end_label);
 615     ctx->while_end_label = prev_label;
 616     return S_OK;
 617 }
 618
 619 static HRESULT compile_foreach_statement(compile_ctx_t *ctx, foreach_statement_t *stat)
 620 {
 621     FIXME("for each loop not implemented\n");
 622     return E_NOTIMPL;
 623 }
 624
 625 static HRESULT compile_forto_statement(compile_ctx_t *ctx, forto_statement_t *stat)
 626 {
 627     unsigned step_instr, instr, prev_label;
 628     BSTR identifier;
 629     HRESULT hres;
 630
 631     identifier = alloc_bstr_arg(ctx, stat->identifier);
 632     if(!identifier)
 633         return E_OUTOFMEMORY;
 634
 635     hres = compile_expression(ctx, stat->from_expr);
 636     if(FAILED(hres))
 637         return hres;
 638
 639     instr = push_instr(ctx, OP_assign_ident);
 640     if(!instr)
 641         return E_OUTOFMEMORY;
 642     instr_ptr(ctx, instr)->arg1.bstr = identifier;
 643
 644     hres = compile_expression(ctx, stat->to_expr);
 645     if(FAILED(hres))
 646         return hres;
 647
 648     if(!push_instr(ctx, OP_val))
 649         return E_OUTOFMEMORY;
 650
 651     if(stat->step_expr) {
 652         hres = compile_expression(ctx, stat->step_expr);
 653         if(FAILED(hres))
 654             return hres;
 655
 656         if(!push_instr(ctx, OP_val))
 657             return E_OUTOFMEMORY;
 658     }else {
 659         hres = push_instr_int(ctx, OP_short, 1);
 660         if(FAILED(hres))
 661             return hres;
 662     }
 663
 664     prev_label = ctx->for_end_label;
 665     ctx->for_end_label = alloc_label(ctx);
 666     if(!ctx->for_end_label)
 667         return E_OUTOFMEMORY;
 668
 669     step_instr = push_instr(ctx, OP_step);
 670     if(!step_instr)
 671         return E_OUTOFMEMORY;
 672     instr_ptr(ctx, step_instr)->arg2.bstr = identifier;
 673     instr_ptr(ctx, step_instr)->arg1.uint = ctx->for_end_label;
 674
 675     hres = compile_statement(ctx, stat->body);
 676     if(FAILED(hres))
 677         return hres;
 678
 679     instr = push_instr(ctx, OP_incc);
 680     if(!instr)
 681         return E_OUTOFMEMORY;
 682     instr_ptr(ctx, instr)->arg1.bstr = identifier;
 683
 684     hres = push_instr_addr(ctx, OP_jmp, step_instr);
 685     if(FAILED(hres))
 686         return hres;
 687
 688     label_set_addr(ctx, ctx->for_end_label);
 689     ctx->for_end_label = prev_label;
 690
 691     return push_instr_uint(ctx, OP_pop, 2);
 692 }
 693
 694 static HRESULT compile_assign_statement(compile_ctx_t *ctx, assign_statement_t *stat, BOOL is_set)
 695 {
 696     unsigned args_cnt;
 697     vbsop_t op;
 698     HRESULT hres;
 699
 700     hres = compile_expression(ctx, stat->value_expr);
 701     if(FAILED(hres))
 702         return hres;
 703
 704     if(stat->member_expr->obj_expr) {
 705         hres = compile_expression(ctx, stat->member_expr->obj_expr);
 706         if(FAILED(hres))
 707             return hres;
 708
 709         op = is_set ? OP_set_member : OP_assign_member;
 710     }else {
 711         op = is_set ? OP_set_ident : OP_assign_ident;
 712     }
 713
 714     hres = compile_args(ctx, stat->member_expr->args, &args_cnt);
 715     if(FAILED(hres))
 716         return hres;
 717
 718     return push_instr_bstr_uint(ctx, op, stat->member_expr->identifier, args_cnt);
 719 }
 720
 721 static BOOL lookup_dim_decls(compile_ctx_t *ctx, const WCHAR *name)
 722 {
 723     dim_decl_t *dim_decl;
 724
 725     for(dim_decl = ctx->dim_decls; dim_decl; dim_decl = dim_decl->next) {
 726         if(!strcmpiW(dim_decl->name, name))
 727             return TRUE;
 728     }
 729
 730     return FALSE;
 731 }
 732
 733 static BOOL lookup_args_name(compile_ctx_t *ctx, const WCHAR *name)
 734 {
 735     unsigned i;
 736
 737     for(i = 0; i < ctx->func->arg_cnt; i++) {
 738         if(!strcmpiW(ctx->func->args[i].name, name))
 739             return TRUE;
 740     }
 741
 742     return FALSE;
 743 }
 744
 745 static HRESULT compile_dim_statement(compile_ctx_t *ctx, dim_statement_t *stat)
 746 {
 747     dim_decl_t *dim_decl = stat->dim_decls;
 748
 749     while(1) {
 750         if(lookup_dim_decls(ctx, dim_decl->name) || lookup_args_name(ctx, dim_decl->name)
 751            || lookup_const_decls(ctx, dim_decl->name, FALSE)) {
 752             FIXME("dim %s name redefined\n", debugstr_w(dim_decl->name));
 753             return E_FAIL;
 754         }
 755
 756         ctx->func->var_cnt++;
 757         if(!dim_decl->next)
 758             break;
 759         dim_decl = dim_decl->next;
 760     }
 761
 762     dim_decl->next = ctx->dim_decls;
 763     ctx->dim_decls = stat->dim_decls;
 764     return S_OK;
 765 }
 766
 767 static HRESULT compile_const_statement(compile_ctx_t *ctx, const_statement_t *stat)
 768 {
 769     const_decl_t *decl, *next_decl = stat->decls;
 770
 771     do {
 772         decl = next_decl;
 773
 774         if(lookup_const_decls(ctx, decl->name, FALSE) || lookup_args_name(ctx, decl->name)
 775                 || lookup_dim_decls(ctx, decl->name)) {
 776             FIXME("%s redefined\n", debugstr_w(decl->name));
 777             return E_FAIL;
 778         }
 779
 780         if(ctx->func->type == FUNC_GLOBAL) {
 781             HRESULT hres;
 782
 783             hres = compile_expression(ctx, decl->value_expr);
 784             if(FAILED(hres))
 785                 return hres;
 786
 787             hres = push_instr_bstr(ctx, OP_const, decl->name);
 788             if(FAILED(hres))
 789                 return hres;
 790         }
 791
 792         next_decl = decl->next;
 793         decl->next = ctx->const_decls;
 794         ctx->const_decls = decl;
 795     } while(next_decl);
 796
 797     return S_OK;
 798 }
 799
 800 static HRESULT compile_function_statement(compile_ctx_t *ctx, function_statement_t *stat)
 801 {
 802     if(ctx->func != &ctx->code->global_code) {
 803         FIXME("Function is not in the global code\n");
 804         return E_FAIL;
 805     }
 806
 807     stat->func_decl->next = ctx->func_decls;
 808     ctx->func_decls = stat->func_decl;
 809     return S_OK;
 810 }
 811
 812 static HRESULT compile_exitdo_statement(compile_ctx_t *ctx)
 813 {
 814     if(!ctx->while_end_label) {
 815         FIXME("Exit Do outside Do Loop\n");
 816         return E_FAIL;
 817     }
 818
 819     return push_instr_addr(ctx, OP_jmp, ctx->while_end_label);
 820 }
 821
 822 static HRESULT compile_exitfor_statement(compile_ctx_t *ctx)
 823 {
 824     if(!ctx->for_end_label) {
 825         FIXME("Exit For outside For Loop\n");
 826         return E_FAIL;
 827     }
 828
 829     return push_instr_addr(ctx, OP_jmp, ctx->for_end_label);
 830 }
 831
 832 static HRESULT compile_exitsub_statement(compile_ctx_t *ctx)
 833 {
 834     if(!ctx->sub_end_label) {
 835         FIXME("Exit Sub outside Sub?\n");
 836         return E_FAIL;
 837     }
 838
 839     return push_instr_addr(ctx, OP_jmp, ctx->sub_end_label);
 840 }
 841
 842 static HRESULT compile_exitfunc_statement(compile_ctx_t *ctx)
 843 {
 844     if(!ctx->func_end_label) {
 845         FIXME("Exit Function outside Function?\n");
 846         return E_FAIL;
 847     }
 848
 849     return push_instr_addr(ctx, OP_jmp, ctx->func_end_label);
 850 }
 851
 852 static HRESULT compile_exitprop_statement(compile_ctx_t *ctx)
 853 {
 854     if(!ctx->prop_end_label) {
 855         FIXME("Exit Property outside Property?\n");
 856         return E_FAIL;
 857     }
 858
 859     return push_instr_addr(ctx, OP_jmp, ctx->prop_end_label);
 860 }
 861
 862 static HRESULT compile_onerror_statement(compile_ctx_t *ctx, onerror_statement_t *stat)
 863 {
 864     return push_instr_int(ctx, OP_errmode, stat->resume_next);
 865 }
 866
 867 static HRESULT compile_statement(compile_ctx_t *ctx, statement_t *stat)
 868 {
 869     HRESULT hres;
 870
 871     while(stat) {
 872         switch(stat->type) {
 873         case STAT_ASSIGN:
 874             hres = compile_assign_statement(ctx, (assign_statement_t*)stat, FALSE);
 875             break;
 876         case STAT_CALL:
 877             hres = compile_member_expression(ctx, ((call_statement_t*)stat)->expr, FALSE);
 878             break;
 879         case STAT_CONST:
 880             hres = compile_const_statement(ctx, (const_statement_t*)stat);
 881             break;
 882         case STAT_DIM:
 883             hres = compile_dim_statement(ctx, (dim_statement_t*)stat);
 884             break;
 885         case STAT_DOWHILE:
 886         case STAT_DOUNTIL:
 887             hres = compile_dowhile_statement(ctx, (while_statement_t*)stat);
 888             break;
 889         case STAT_EXITDO:
 890             hres = compile_exitdo_statement(ctx);
 891             break;
 892         case STAT_EXITFOR:
 893             hres = compile_exitfor_statement(ctx);
 894             break;
 895         case STAT_EXITFUNC:
 896             hres = compile_exitfunc_statement(ctx);
 897             break;
 898         case STAT_EXITPROP:
 899             hres = compile_exitprop_statement(ctx);
 900             break;
 901         case STAT_EXITSUB:
 902             hres = compile_exitsub_statement(ctx);
 903             break;
 904         case STAT_FOREACH:
 905             hres = compile_foreach_statement(ctx, (foreach_statement_t*)stat);
 906             break;
 907         case STAT_FORTO:
 908             hres = compile_forto_statement(ctx, (forto_statement_t*)stat);
 909             break;
 910         case STAT_FUNC:
 911             hres = compile_function_statement(ctx, (function_statement_t*)stat);
 912             break;
 913         case STAT_IF:
 914             hres = compile_if_statement(ctx, (if_statement_t*)stat);
 915             break;
 916         case STAT_ONERROR:
 917             hres = compile_onerror_statement(ctx, (onerror_statement_t*)stat);
 918             break;
 919         case STAT_SET:
 920             hres = compile_assign_statement(ctx, (assign_statement_t*)stat, TRUE);
 921             break;
 922         case STAT_STOP:
 923             hres = push_instr(ctx, OP_stop) ? S_OK : E_OUTOFMEMORY;
 924             break;
 925         case STAT_UNTIL:
 926         case STAT_WHILE:
 927         case STAT_WHILELOOP:
 928             hres = compile_while_statement(ctx, (while_statement_t*)stat);
 929             break;
 930         default:
 931             FIXME("Unimplemented statement type %d\n", stat->type);
 932             hres = E_NOTIMPL;
 933         }
 934
 935         if(FAILED(hres))
 936             return hres;
 937         stat = stat->next;
 938     }
 939
 940     return S_OK;
 941 }
 942
 943 static void resolve_labels(compile_ctx_t *ctx, unsigned off)
 944 {
 945     instr_t *instr;
 946
 947     for(instr = ctx->code->instrs+off; instr < ctx->code->instrs+ctx->instr_cnt; instr++) {
 948         if(instr_info[instr->op].arg1_type == ARG_ADDR && (instr->arg1.uint & LABEL_FLAG)) {
 949             assert((instr->arg1.uint & ~LABEL_FLAG) < ctx->labels_cnt);
 950             instr->arg1.uint = ctx->labels[instr->arg1.uint & ~LABEL_FLAG];
 951         }
 952         assert(instr_info[instr->op].arg2_type != ARG_ADDR);
 953     }
 954
 955     ctx->labels_cnt = 0;
 956 }
 957
 958 static HRESULT compile_func(compile_ctx_t *ctx, statement_t *stat, function_t *func)
 959 {
 960     HRESULT hres;
 961
 962     func->code_off = ctx->instr_cnt;
 963
 964     ctx->while_end_label = 0;
 965     ctx->for_end_label = 0;
 966     ctx->sub_end_label = 0;
 967     ctx->func_end_label = 0;
 968     ctx->prop_end_label = 0;
 969
 970     switch(func->type) {
 971     case FUNC_FUNCTION:
 972         ctx->func_end_label = alloc_label(ctx);
 973         if(!ctx->func_end_label)
 974             return E_OUTOFMEMORY;
 975         break;
 976     case FUNC_SUB:
 977         ctx->sub_end_label = alloc_label(ctx);
 978         if(!ctx->sub_end_label)
 979             return E_OUTOFMEMORY;
 980         break;
 981     case FUNC_PROPGET:
 982     case FUNC_PROPLET:
 983     case FUNC_PROPSET:
 984     case FUNC_DEFGET:
 985         ctx->prop_end_label = alloc_label(ctx);
 986         if(!ctx->prop_end_label)
 987             return E_OUTOFMEMORY;
 988         break;
 989     case FUNC_GLOBAL:
 990         break;
 991     }
 992
 993     ctx->func = func;
 994     ctx->dim_decls = NULL;
 995     ctx->const_decls = NULL;
 996     hres = compile_statement(ctx, stat);
 997     ctx->func = NULL;
 998     if(FAILED(hres))
 999         return hres;
1000
1001     assert(!ctx->while_end_label);
1002     assert(!ctx->for_end_label);
1003
1004     if(ctx->sub_end_label)
1005         label_set_addr(ctx, ctx->sub_end_label);
1006     if(ctx->func_end_label)
1007         label_set_addr(ctx, ctx->func_end_label);
1008     if(ctx->prop_end_label)
1009         label_set_addr(ctx, ctx->prop_end_label);
1010
1011     if(!push_instr(ctx, OP_ret))
1012         return E_OUTOFMEMORY;
1013
1014     resolve_labels(ctx, func->code_off);
1015
1016     if(func->var_cnt) {
1017         dim_decl_t *dim_decl;
1018
1019         if(func->type == FUNC_GLOBAL) {
1020             dynamic_var_t *new_var;
1021
1022             func->var_cnt = 0;
1023
1024             for(dim_decl = ctx->dim_decls; dim_decl; dim_decl = dim_decl->next) {
1025                 new_var = compiler_alloc(ctx->code, sizeof(*new_var));
1026                 if(!new_var)
1027                     return E_OUTOFMEMORY;
1028
1029                 new_var->name = compiler_alloc_string(ctx->code, dim_decl->name);
1030                 if(!new_var->name)
1031                     return E_OUTOFMEMORY;
1032
1033                 V_VT(&new_var->v) = VT_EMPTY;
1034                 new_var->is_const = FALSE;
1035
1036                 new_var->next = ctx->global_vars;
1037                 ctx->global_vars = new_var;
1038             }
1039         }else {
1040             unsigned i;
1041
1042             func->vars = compiler_alloc(ctx->code, func->var_cnt * sizeof(var_desc_t));
1043             if(!func->vars)
1044                 return E_OUTOFMEMORY;
1045
1046             for(dim_decl = ctx->dim_decls, i=0; dim_decl; dim_decl = dim_decl->next, i++) {
1047                 func->vars[i].name = compiler_alloc_string(ctx->code, dim_decl->name);
1048                 if(!func->vars[i].name)
1049                     return E_OUTOFMEMORY;
1050             }
1051
1052             assert(i == func->var_cnt);
1053         }
1054     }
1055
1056     return S_OK;
1057 }
1058
1059 static BOOL lookup_funcs_name(compile_ctx_t *ctx, const WCHAR *name)
1060 {
1061     function_t *iter;
1062
1063     for(iter = ctx->funcs; iter; iter = iter->next) {
1064         if(!strcmpiW(iter->name, name))
1065             return TRUE;
1066     }
1067
1068     return FALSE;
1069 }
1070
1071 static HRESULT create_function(compile_ctx_t *ctx, function_decl_t *decl, function_t **ret)
1072 {
1073     function_t *func;
1074     HRESULT hres;
1075
1076     if(lookup_dim_decls(ctx, decl->name) || lookup_funcs_name(ctx, decl->name) || lookup_const_decls(ctx, decl->name, FALSE)) {
1077         FIXME("%s: redefinition\n", debugstr_w(decl->name));
1078         return E_FAIL;
1079     }
1080
1081     func = compiler_alloc(ctx->code, sizeof(*func));
1082     if(!func)
1083         return E_OUTOFMEMORY;
1084
1085     func->name = compiler_alloc_string(ctx->code, decl->name);
1086     if(!func->name)
1087         return E_OUTOFMEMORY;
1088
1089     func->vars = NULL;
1090     func->var_cnt = 0;
1091     func->code_ctx = ctx->code;
1092     func->type = decl->type;
1093     func->is_public = decl->is_public;
1094
1095     func->arg_cnt = 0;
1096     if(decl->args) {
1097         arg_decl_t *arg;
1098         unsigned i;
1099
1100         for(arg = decl->args; arg; arg = arg->next)
1101             func->arg_cnt++;
1102
1103         func->args = compiler_alloc(ctx->code, func->arg_cnt * sizeof(arg_desc_t));
1104         if(!func->args)
1105             return E_OUTOFMEMORY;
1106
1107         for(i = 0, arg = decl->args; arg; arg = arg->next, i++) {
1108             func->args[i].name = compiler_alloc_string(ctx->code, arg->name);
1109             if(!func->args[i].name)
1110                 return E_OUTOFMEMORY;
1111             func->args[i].by_ref = arg->by_ref;
1112         }
1113     }else {
1114         func->args = NULL;
1115     }
1116
1117     hres = compile_func(ctx, decl->body, func);
1118     if(FAILED(hres))
1119         return hres;
1120
1121     *ret = func;
1122     return S_OK;
1123 }
1124
1125 static BOOL lookup_class_name(compile_ctx_t *ctx, const WCHAR *name)
1126 {
1127     class_desc_t *iter;
1128
1129     for(iter = ctx->classes; iter; iter = iter->next) {
1130         if(!strcmpiW(iter->name, name))
1131             return TRUE;
1132     }
1133
1134     return FALSE;
1135 }
1136
1137 static HRESULT create_class_funcprop(compile_ctx_t *ctx, function_decl_t *func_decl, vbdisp_funcprop_desc_t *desc)
1138 {
1139     vbdisp_invoke_type_t invoke_type;
1140     function_decl_t *funcprop_decl;
1141     HRESULT hres;
1142
1143     desc->name = compiler_alloc_string(ctx->code, func_decl->name);
1144     if(!desc->name)
1145         return E_OUTOFMEMORY;
1146
1147     for(funcprop_decl = func_decl; funcprop_decl; funcprop_decl = funcprop_decl->next_prop_func) {
1148         switch(funcprop_decl->type) {
1149         case FUNC_FUNCTION:
1150         case FUNC_SUB:
1151         case FUNC_PROPGET:
1152         case FUNC_DEFGET:
1153             invoke_type = VBDISP_CALLGET;
1154             break;
1155         case FUNC_PROPLET:
1156             invoke_type = VBDISP_LET;
1157             break;
1158         case FUNC_PROPSET:
1159             invoke_type = VBDISP_SET;
1160             break;
1161         default:
1162             assert(0);
1163         }
1164
1165         assert(!desc->entries[invoke_type]);
1166
1167         if(funcprop_decl->is_public)
1168             desc->is_public = TRUE;
1169
1170         hres = create_function(ctx, funcprop_decl, desc->entries+invoke_type);
1171         if(FAILED(hres))
1172             return hres;
1173     }
1174
1175     return S_OK;
1176 }
1177
1178 static BOOL lookup_class_funcs(class_desc_t *class_desc, const WCHAR *name)
1179 {
1180     unsigned i;
1181
1182     for(i=0; i < class_desc->func_cnt; i++) {
1183         if(class_desc->funcs[i].name && !strcmpiW(class_desc->funcs[i].name, name))
1184             return TRUE;
1185     }
1186
1187     return FALSE;
1188 }
1189
1190 static HRESULT compile_class(compile_ctx_t *ctx, class_decl_t *class_decl)
1191 {
1192     function_decl_t *func_decl, *func_prop_decl;
1193     class_prop_decl_t *prop_decl;
1194     class_desc_t *class_desc;
1195     unsigned i;
1196     HRESULT hres;
1197
1198     static const WCHAR class_initializeW[] = {'c','l','a','s','s','_','i','n','i','t','i','a','l','i','z','e',0};
1199     static const WCHAR class_terminateW[] = {'c','l','a','s','s','_','t','e','r','m','i','n','a','t','e',0};
1200
1201     if(lookup_dim_decls(ctx, class_decl->name) || lookup_funcs_name(ctx, class_decl->name)
1202             || lookup_const_decls(ctx, class_decl->name, FALSE) || lookup_class_name(ctx, class_decl->name)) {
1203         FIXME("%s: redefinition\n", debugstr_w(class_decl->name));
1204         return E_FAIL;
1205     }
1206
1207     class_desc = compiler_alloc_zero(ctx->code, sizeof(*class_desc));
1208     if(!class_desc)
1209         return E_OUTOFMEMORY;
1210
1211     class_desc->name = compiler_alloc_string(ctx->code, class_decl->name);
1212     if(!class_desc->name)
1213         return E_OUTOFMEMORY;
1214
1215     class_desc->func_cnt = 1; /* always allocate slot for default getter */
1216
1217     for(func_decl = class_decl->funcs; func_decl; func_decl = func_decl->next) {
1218         for(func_prop_decl = func_decl; func_prop_decl; func_prop_decl = func_prop_decl->next_prop_func) {
1219             if(func_prop_decl->type == FUNC_DEFGET)
1220                 break;
1221         }
1222         if(!func_prop_decl)
1223             class_desc->func_cnt++;
1224     }
1225
1226     class_desc->funcs = compiler_alloc(ctx->code, class_desc->func_cnt*sizeof(*class_desc->funcs));
1227     if(!class_desc->funcs)
1228         return E_OUTOFMEMORY;
1229     memset(class_desc->funcs, 0, class_desc->func_cnt*sizeof(*class_desc->funcs));
1230
1231     for(func_decl = class_decl->funcs, i=1; func_decl; func_decl = func_decl->next, i++) {
1232         for(func_prop_decl = func_decl; func_prop_decl; func_prop_decl = func_prop_decl->next_prop_func) {
1233             if(func_prop_decl->type == FUNC_DEFGET) {
1234                 i--;
1235                 break;
1236             }
1237         }
1238
1239         if(!strcmpiW(class_initializeW, func_decl->name)) {
1240             if(func_decl->type != FUNC_SUB) {
1241                 FIXME("class initializer is not sub\n");
1242                 return E_FAIL;
1243             }
1244
1245             class_desc->class_initialize_id = i;
1246         }else  if(!strcmpiW(class_terminateW, func_decl->name)) {
1247             if(func_decl->type != FUNC_SUB) {
1248                 FIXME("class terminator is not sub\n");
1249                 return E_FAIL;
1250             }
1251
1252             class_desc->class_terminate_id = i;
1253         }
1254
1255         hres = create_class_funcprop(ctx, func_decl, class_desc->funcs + (func_prop_decl ? 0 : i));
1256         if(FAILED(hres))
1257             return hres;
1258     }
1259
1260     for(prop_decl = class_decl->props; prop_decl; prop_decl = prop_decl->next)
1261         class_desc->prop_cnt++;
1262
1263     class_desc->props = compiler_alloc(ctx->code, class_desc->prop_cnt*sizeof(*class_desc->props));
1264     if(!class_desc->props)
1265         return E_OUTOFMEMORY;
1266
1267     for(prop_decl = class_decl->props, i=0; prop_decl; prop_decl = prop_decl->next, i++) {
1268         if(lookup_class_funcs(class_desc, prop_decl->name)) {
1269             FIXME("Property %s redefined\n", debugstr_w(prop_decl->name));
1270             return E_FAIL;
1271         }
1272
1273         class_desc->props[i].name = compiler_alloc_string(ctx->code, prop_decl->name);
1274         if(!class_desc->props[i].name)
1275             return E_OUTOFMEMORY;
1276
1277         class_desc->props[i].is_public = prop_decl->is_public;
1278     }
1279
1280     class_desc->next = ctx->classes;
1281     ctx->classes = class_desc;
1282     return S_OK;
1283 }
1284
1285 static BOOL lookup_script_identifier(script_ctx_t *script, const WCHAR *identifier)
1286 {
1287     class_desc_t *class;
1288     dynamic_var_t *var;
1289     function_t *func;
1290
1291     for(var = script->global_vars; var; var = var->next) {
1292         if(!strcmpiW(var->name, identifier))
1293             return TRUE;
1294     }
1295
1296     for(func = script->global_funcs; func; func = func->next) {
1297         if(!strcmpiW(func->name, identifier))
1298             return TRUE;
1299     }
1300
1301     for(class = script->classes; class; class = class->next) {
1302         if(!strcmpiW(class->name, identifier))
1303             return TRUE;
1304     }
1305
1306     return FALSE;
1307 }
1308
1309 static HRESULT check_script_collisions(compile_ctx_t *ctx, script_ctx_t *script)
1310 {
1311     class_desc_t *class;
1312     dynamic_var_t *var;
1313     function_t *func;
1314
1315     for(var = ctx->global_vars; var; var = var->next) {
1316         if(lookup_script_identifier(script, var->name)) {
1317             FIXME("%s: redefined\n", debugstr_w(var->name));
1318             return E_FAIL;
1319         }
1320     }
1321
1322     for(func = ctx->funcs; func; func = func->next) {
1323         if(lookup_script_identifier(script, func->name)) {
1324             FIXME("%s: redefined\n", debugstr_w(func->name));
1325             return E_FAIL;
1326         }
1327     }
1328
1329     for(class = ctx->classes; class; class = class->next) {
1330         if(lookup_script_identifier(script, class->name)) {
1331             FIXME("%s: redefined\n", debugstr_w(class->name));
1332             return E_FAIL;
1333         }
1334     }
1335
1336     return S_OK;
1337 }
1338
1339 void release_vbscode(vbscode_t *code)
1340 {
1341     unsigned i;
1342
1343     list_remove(&code->entry);
1344
1345     for(i=0; i < code->bstr_cnt; i++)
1346         SysFreeString(code->bstr_pool[i]);
1347
1348     vbsheap_free(&code->heap);
1349
1350     heap_free(code->bstr_pool);
1351     heap_free(code->source);
1352     heap_free(code->instrs);
1353     heap_free(code);
1354 }
1355
1356 static vbscode_t *alloc_vbscode(compile_ctx_t *ctx, const WCHAR *source)
1357 {
1358     vbscode_t *ret;
1359
1360     ret = heap_alloc(sizeof(*ret));
1361     if(!ret)
1362         return NULL;
1363
1364     ret->source = heap_strdupW(source);
1365     if(!ret->source) {
1366         heap_free(ret);
1367         return NULL;
1368     }
1369
1370     ret->instrs = heap_alloc(32*sizeof(instr_t));
1371     if(!ret->instrs) {
1372         release_vbscode(ret);
1373         return NULL;
1374     }
1375
1376     ctx->instr_cnt = 1;
1377     ctx->instr_size = 32;
1378     vbsheap_init(&ret->heap);
1379
1380     ret->option_explicit = ctx->parser.option_explicit;
1381
1382     ret->bstr_pool = NULL;
1383     ret->bstr_pool_size = 0;
1384     ret->bstr_cnt = 0;
1385     ret->global_executed = FALSE;
1386
1387     ret->global_code.type = FUNC_GLOBAL;
1388     ret->global_code.name = NULL;
1389     ret->global_code.code_ctx = ret;
1390     ret->global_code.vars = NULL;
1391     ret->global_code.var_cnt = 0;
1392     ret->global_code.arg_cnt = 0;
1393     ret->global_code.args = NULL;
1394
1395     list_init(&ret->entry);
1396     return ret;
1397 }
1398
1399 static void release_compiler(compile_ctx_t *ctx)
1400 {
1401     parser_release(&ctx->parser);
1402     heap_free(ctx->labels);
1403     if(ctx->code)
1404         release_vbscode(ctx->code);
1405 }
1406
1407 HRESULT compile_script(script_ctx_t *script, const WCHAR *src, vbscode_t **ret)
1408 {
1409     function_t *new_func;
1410     function_decl_t *func_decl;
1411     class_decl_t *class_decl;
1412     compile_ctx_t ctx;
1413     vbscode_t *code;
1414     HRESULT hres;
1415
1416     hres = parse_script(&ctx.parser, src);
1417     if(FAILED(hres))
1418         return hres;
1419
1420     code = ctx.code = alloc_vbscode(&ctx, src);
1421     if(!ctx.code)
1422         return E_OUTOFMEMORY;
1423
1424     ctx.funcs = NULL;
1425     ctx.func_decls = NULL;
1426     ctx.global_vars = NULL;
1427     ctx.dim_decls = NULL;
1428     ctx.classes = NULL;
1429     ctx.labels = NULL;
1430     ctx.global_consts = NULL;
1431     ctx.labels_cnt = ctx.labels_size = 0;
1432
1433     hres = compile_func(&ctx, ctx.parser.stats, &ctx.code->global_code);
1434     if(FAILED(hres)) {
1435         release_compiler(&ctx);
1436         return hres;
1437     }
1438
1439     ctx.global_consts = ctx.const_decls;
1440
1441     for(func_decl = ctx.func_decls; func_decl; func_decl = func_decl->next) {
1442         hres = create_function(&ctx, func_decl, &new_func);
1443         if(FAILED(hres)) {
1444             release_compiler(&ctx);
1445             return hres;
1446         }
1447
1448         new_func->next = ctx.funcs;
1449         ctx.funcs = new_func;
1450     }
1451
1452     for(class_decl = ctx.parser.class_decls; class_decl; class_decl = class_decl->next) {
1453         hres = compile_class(&ctx, class_decl);
1454         if(FAILED(hres)) {
1455             release_compiler(&ctx);
1456             return hres;
1457         }
1458     }
1459
1460     hres = check_script_collisions(&ctx, script);
1461     if(FAILED(hres)) {
1462         release_compiler(&ctx);
1463         return hres;
1464     }
1465
1466     if(ctx.global_vars) {
1467         dynamic_var_t *var;
1468
1469         for(var = ctx.global_vars; var->next; var = var->next);
1470
1471         var->next = script->global_vars;
1472         script->global_vars = ctx.global_vars;
1473     }
1474
1475     if(ctx.funcs) {
1476         for(new_func = ctx.funcs; new_func->next; new_func = new_func->next);
1477
1478         new_func->next = script->global_funcs;
1479         script->global_funcs = ctx.funcs;
1480     }
1481
1482     if(ctx.classes) {
1483         class_desc_t *class = ctx.classes;
1484
1485         while(1) {
1486             class->ctx = script;
1487             if(!class->next)
1488                 break;
1489             class = class->next;
1490         }
1491
1492         class->next = script->classes;
1493         script->classes = ctx.classes;
1494     }
1495
1496     if(TRACE_ON(vbscript_disas))
1497         dump_code(&ctx);
1498
1499     ctx.code = NULL;
1500     release_compiler(&ctx);
1501
1502     list_add_tail(&script->code_list, &code->entry);
1503     *ret = code;
1504     return S_OK;
1505 }