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 _statement_ctx_t {
  31     unsigned stack_use;
  32
  33     unsigned while_end_label;
  34     unsigned for_end_label;
  35
  36     struct _statement_ctx_t *next;
  37 } statement_ctx_t;
  38
  39 typedef struct {
  40     parser_ctx_t parser;
  41
  42     unsigned instr_cnt;
  43     unsigned instr_size;
  44     vbscode_t *code;
  45
  46     statement_ctx_t *stat_ctx;
  47
  48     unsigned *labels;
  49     unsigned labels_size;
  50     unsigned labels_cnt;
  51
  52     unsigned sub_end_label;
  53     unsigned func_end_label;
  54     unsigned prop_end_label;
  55
  56     dim_decl_t *dim_decls;
  57     dynamic_var_t *global_vars;
  58
  59     const_decl_t *const_decls;
  60     const_decl_t *global_consts;
  61
  62     function_t *func;
  63     function_t *funcs;
  64     function_decl_t *func_decls;
  65
  66     class_desc_t *classes;
  67 } compile_ctx_t;
  68
  69 static HRESULT compile_expression(compile_ctx_t*,expression_t*);
  70 static HRESULT compile_statement(compile_ctx_t*,statement_ctx_t*,statement_t*);
  71
  72 static const struct {
  73     const char *op_str;
  74     instr_arg_type_t arg1_type;
  75     instr_arg_type_t arg2_type;
  76 } instr_info[] = {
  77 #define X(n,a,b,c) {#n,b,c},
  78 OP_LIST
  79 #undef X
  80 };
  81
  82 static void dump_instr_arg(instr_arg_type_t type, instr_arg_t *arg)
  83 {
  84     switch(type) {
  85     case ARG_STR:
  86     case ARG_BSTR:
  87         TRACE_(vbscript_disas)("\t%s", debugstr_w(arg->str));
  88         break;
  89     case ARG_INT:
  90         TRACE_(vbscript_disas)("\t%d", arg->uint);
  91         break;
  92     case ARG_UINT:
  93     case ARG_ADDR:
  94         TRACE_(vbscript_disas)("\t%u", arg->uint);
  95         break;
  96     case ARG_DOUBLE:
  97         TRACE_(vbscript_disas)("\t%lf", *arg->dbl);
  98         break;
  99     case ARG_NONE:
 100         break;
 101     default:
 102         assert(0);
 103     }
 104 }
 105
 106 static void dump_code(compile_ctx_t *ctx)
 107 {
 108     instr_t *instr;
 109
 110     for(instr = ctx->code->instrs+1; instr < ctx->code->instrs+ctx->instr_cnt; instr++) {
 111         assert(instr->op < OP_LAST);
 112         TRACE_(vbscript_disas)("%d:\t%s", (int)(instr-ctx->code->instrs), instr_info[instr->op].op_str);
 113         dump_instr_arg(instr_info[instr->op].arg1_type, &instr->arg1);
 114         dump_instr_arg(instr_info[instr->op].arg2_type, &instr->arg2);
 115         TRACE_(vbscript_disas)("\n");
 116     }
 117 }
 118
 119 static inline void *compiler_alloc(vbscode_t *vbscode, size_t size)
 120 {
 121     return vbsheap_alloc(&vbscode->heap, size);
 122 }
 123
 124 static inline void *compiler_alloc_zero(vbscode_t *vbscode, size_t size)
 125 {
 126     void *ret;
 127
 128     ret = vbsheap_alloc(&vbscode->heap, size);
 129     if(ret)
 130         memset(ret, 0, size);
 131     return ret;
 132 }
 133
 134 static WCHAR *compiler_alloc_string(vbscode_t *vbscode, const WCHAR *str)
 135 {
 136     size_t size;
 137     WCHAR *ret;
 138
 139     size = (strlenW(str)+1)*sizeof(WCHAR);
 140     ret = compiler_alloc(vbscode, size);
 141     if(ret)
 142         memcpy(ret, str, size);
 143     return ret;
 144 }
 145
 146 static inline instr_t *instr_ptr(compile_ctx_t *ctx, unsigned id)
 147 {
 148     assert(id < ctx->instr_cnt);
 149     return ctx->code->instrs + id;
 150 }
 151
 152 static unsigned push_instr(compile_ctx_t *ctx, vbsop_t op)
 153 {
 154     assert(ctx->instr_size && ctx->instr_size >= ctx->instr_cnt);
 155
 156     if(ctx->instr_size == ctx->instr_cnt) {
 157         instr_t *new_instr;
 158
 159         new_instr = heap_realloc(ctx->code->instrs, ctx->instr_size*2*sizeof(instr_t));
 160         if(!new_instr)
 161             return 0;
 162
 163         ctx->code->instrs = new_instr;
 164         ctx->instr_size *= 2;
 165     }
 166
 167     ctx->code->instrs[ctx->instr_cnt].op = op;
 168     return ctx->instr_cnt++;
 169 }
 170
 171 static HRESULT push_instr_int(compile_ctx_t *ctx, vbsop_t op, LONG arg)
 172 {
 173     unsigned ret;
 174
 175     ret = push_instr(ctx, op);
 176     if(!ret)
 177         return E_OUTOFMEMORY;
 178
 179     instr_ptr(ctx, ret)->arg1.lng = arg;
 180     return S_OK;
 181 }
 182
 183 static HRESULT push_instr_uint(compile_ctx_t *ctx, vbsop_t op, unsigned arg)
 184 {
 185     unsigned ret;
 186
 187     ret = push_instr(ctx, op);
 188     if(!ret)
 189         return E_OUTOFMEMORY;
 190
 191     instr_ptr(ctx, ret)->arg1.uint = arg;
 192     return S_OK;
 193 }
 194
 195 static HRESULT push_instr_addr(compile_ctx_t *ctx, vbsop_t op, unsigned arg)
 196 {
 197     unsigned ret;
 198
 199     ret = push_instr(ctx, op);
 200     if(!ret)
 201         return E_OUTOFMEMORY;
 202
 203     instr_ptr(ctx, ret)->arg1.uint = arg;
 204     return S_OK;
 205 }
 206
 207 static HRESULT push_instr_str(compile_ctx_t *ctx, vbsop_t op, const WCHAR *arg)
 208 {
 209     unsigned instr;
 210     WCHAR *str;
 211
 212     str = compiler_alloc_string(ctx->code, arg);
 213     if(!str)
 214         return E_OUTOFMEMORY;
 215
 216     instr = push_instr(ctx, op);
 217     if(!instr)
 218         return E_OUTOFMEMORY;
 219
 220     instr_ptr(ctx, instr)->arg1.str = str;
 221     return S_OK;
 222 }
 223
 224 static HRESULT push_instr_double(compile_ctx_t *ctx, vbsop_t op, double arg)
 225 {
 226     unsigned instr;
 227     double *d;
 228
 229     d = compiler_alloc(ctx->code, sizeof(double));
 230     if(!d)
 231         return E_OUTOFMEMORY;
 232
 233     instr = push_instr(ctx, op);
 234     if(!instr)
 235         return E_OUTOFMEMORY;
 236
 237     *d = arg;
 238     instr_ptr(ctx, instr)->arg1.dbl = d;
 239     return S_OK;
 240 }
 241
 242 static BSTR alloc_bstr_arg(compile_ctx_t *ctx, const WCHAR *str)
 243 {
 244     if(!ctx->code->bstr_pool_size) {
 245         ctx->code->bstr_pool = heap_alloc(8 * sizeof(BSTR));
 246         if(!ctx->code->bstr_pool)
 247             return NULL;
 248         ctx->code->bstr_pool_size = 8;
 249     }else if(ctx->code->bstr_pool_size == ctx->code->bstr_cnt) {
 250         BSTR *new_pool;
 251
 252         new_pool = heap_realloc(ctx->code->bstr_pool, ctx->code->bstr_pool_size*2*sizeof(BSTR));
 253         if(!new_pool)
 254             return NULL;
 255
 256         ctx->code->bstr_pool = new_pool;
 257         ctx->code->bstr_pool_size *= 2;
 258     }
 259
 260     ctx->code->bstr_pool[ctx->code->bstr_cnt] = SysAllocString(str);
 261     if(!ctx->code->bstr_pool[ctx->code->bstr_cnt])
 262         return NULL;
 263
 264     return ctx->code->bstr_pool[ctx->code->bstr_cnt++];
 265 }
 266
 267 static HRESULT push_instr_bstr(compile_ctx_t *ctx, vbsop_t op, const WCHAR *arg)
 268 {
 269     unsigned instr;
 270     BSTR bstr;
 271
 272     bstr = alloc_bstr_arg(ctx, arg);
 273     if(!bstr)
 274         return E_OUTOFMEMORY;
 275
 276     instr = push_instr(ctx, op);
 277     if(!instr)
 278         return E_OUTOFMEMORY;
 279
 280     instr_ptr(ctx, instr)->arg1.bstr = bstr;
 281     return S_OK;
 282 }
 283
 284 static HRESULT push_instr_bstr_uint(compile_ctx_t *ctx, vbsop_t op, const WCHAR *arg1, unsigned arg2)
 285 {
 286     unsigned instr;
 287     BSTR bstr;
 288
 289     bstr = alloc_bstr_arg(ctx, arg1);
 290     if(!bstr)
 291         return E_OUTOFMEMORY;
 292
 293     instr = push_instr(ctx, op);
 294     if(!instr)
 295         return E_OUTOFMEMORY;
 296
 297     instr_ptr(ctx, instr)->arg1.bstr = bstr;
 298     instr_ptr(ctx, instr)->arg2.uint = arg2;
 299     return S_OK;
 300 }
 301
 302 static HRESULT push_instr_uint_bstr(compile_ctx_t *ctx, vbsop_t op, unsigned arg1, const WCHAR *arg2)
 303 {
 304     unsigned instr;
 305     BSTR bstr;
 306
 307     bstr = alloc_bstr_arg(ctx, arg2);
 308     if(!bstr)
 309         return E_OUTOFMEMORY;
 310
 311     instr = push_instr(ctx, op);
 312     if(!instr)
 313         return E_OUTOFMEMORY;
 314
 315     instr_ptr(ctx, instr)->arg1.uint = arg1;
 316     instr_ptr(ctx, instr)->arg2.bstr = bstr;
 317     return S_OK;
 318 }
 319
 320 #define LABEL_FLAG 0x80000000
 321
 322 static unsigned alloc_label(compile_ctx_t *ctx)
 323 {
 324     if(!ctx->labels_size) {
 325         ctx->labels = heap_alloc(8 * sizeof(*ctx->labels));
 326         if(!ctx->labels)
 327             return 0;
 328         ctx->labels_size = 8;
 329     }else if(ctx->labels_size == ctx->labels_cnt) {
 330         unsigned *new_labels;
 331
 332         new_labels = heap_realloc(ctx->labels, 2*ctx->labels_size*sizeof(*ctx->labels));
 333         if(!new_labels)
 334             return 0;
 335
 336         ctx->labels = new_labels;
 337         ctx->labels_size *= 2;
 338     }
 339
 340     return ctx->labels_cnt++ | LABEL_FLAG;
 341 }
 342
 343 static inline void label_set_addr(compile_ctx_t *ctx, unsigned label)
 344 {
 345     assert(label & LABEL_FLAG);
 346     ctx->labels[label & ~LABEL_FLAG] = ctx->instr_cnt;
 347 }
 348
 349 static expression_t *lookup_const_decls(compile_ctx_t *ctx, const WCHAR *name, BOOL lookup_global)
 350 {
 351     const_decl_t *decl;
 352
 353     for(decl = ctx->const_decls; decl; decl = decl->next) {
 354         if(!strcmpiW(decl->name, name))
 355             return decl->value_expr;
 356     }
 357
 358     if(!lookup_global)
 359         return NULL;
 360
 361     for(decl = ctx->global_consts; decl; decl = decl->next) {
 362         if(!strcmpiW(decl->name, name))
 363             return decl->value_expr;
 364     }
 365
 366     return NULL;
 367 }
 368
 369 static HRESULT compile_args(compile_ctx_t *ctx, expression_t *args, unsigned *ret)
 370 {
 371     unsigned arg_cnt = 0;
 372     HRESULT hres;
 373
 374     while(args) {
 375         hres = compile_expression(ctx, args);
 376         if(FAILED(hres))
 377             return hres;
 378
 379         arg_cnt++;
 380         args = args->next;
 381     }
 382
 383     *ret = arg_cnt;
 384     return S_OK;
 385 }
 386
 387 static HRESULT compile_member_expression(compile_ctx_t *ctx, member_expression_t *expr, BOOL ret_val)
 388 {
 389     unsigned arg_cnt = 0;
 390     HRESULT hres;
 391
 392     if(ret_val && !expr->args) {
 393         expression_t *const_expr;
 394
 395         const_expr = lookup_const_decls(ctx, expr->identifier, TRUE);
 396         if(const_expr)
 397             return compile_expression(ctx, const_expr);
 398     }
 399
 400     hres = compile_args(ctx, expr->args, &arg_cnt);
 401     if(FAILED(hres))
 402         return hres;
 403
 404     if(expr->obj_expr) {
 405         hres = compile_expression(ctx, expr->obj_expr);
 406         if(FAILED(hres))
 407             return hres;
 408
 409         hres = push_instr_bstr_uint(ctx, ret_val ? OP_mcall : OP_mcallv, expr->identifier, arg_cnt);
 410     }else {
 411         hres = push_instr_bstr_uint(ctx, ret_val ? OP_icall : OP_icallv, expr->identifier, arg_cnt);
 412     }
 413
 414     return hres;
 415 }
 416
 417 static HRESULT compile_unary_expression(compile_ctx_t *ctx, unary_expression_t *expr, vbsop_t op)
 418 {
 419     HRESULT hres;
 420
 421     hres = compile_expression(ctx, expr->subexpr);
 422     if(FAILED(hres))
 423         return hres;
 424
 425     return push_instr(ctx, op) ? S_OK : E_OUTOFMEMORY;
 426 }
 427
 428 static HRESULT compile_binary_expression(compile_ctx_t *ctx, binary_expression_t *expr, vbsop_t op)
 429 {
 430     HRESULT hres;
 431
 432     hres = compile_expression(ctx, expr->left);
 433     if(FAILED(hres))
 434         return hres;
 435
 436     hres = compile_expression(ctx, expr->right);
 437     if(FAILED(hres))
 438         return hres;
 439
 440     return push_instr(ctx, op) ? S_OK : E_OUTOFMEMORY;
 441 }
 442
 443 static HRESULT compile_expression(compile_ctx_t *ctx, expression_t *expr)
 444 {
 445     switch(expr->type) {
 446     case EXPR_ADD:
 447         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_add);
 448     case EXPR_AND:
 449         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_and);
 450     case EXPR_BOOL:
 451         return push_instr_int(ctx, OP_bool, ((bool_expression_t*)expr)->value);
 452     case EXPR_BRACKETS:
 453         return compile_expression(ctx, ((unary_expression_t*)expr)->subexpr);
 454     case EXPR_CONCAT:
 455         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_concat);
 456     case EXPR_DIV:
 457         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_div);
 458     case EXPR_DOUBLE:
 459         return push_instr_double(ctx, OP_double, ((double_expression_t*)expr)->value);
 460     case EXPR_EMPTY:
 461         return push_instr(ctx, OP_empty) ? S_OK : E_OUTOFMEMORY;
 462     case EXPR_EQUAL:
 463         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_equal);
 464     case EXPR_EQV:
 465         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_eqv);
 466     case EXPR_EXP:
 467         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_exp);
 468     case EXPR_GT:
 469         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_gt);
 470     case EXPR_GTEQ:
 471         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_gteq);
 472     case EXPR_IDIV:
 473         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_idiv);
 474     case EXPR_IS:
 475         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_is);
 476     case EXPR_IMP:
 477         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_imp);
 478     case EXPR_LT:
 479         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_lt);
 480     case EXPR_LTEQ:
 481         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_lteq);
 482     case EXPR_ME:
 483         return push_instr(ctx, OP_me) ? S_OK : E_OUTOFMEMORY;
 484     case EXPR_MEMBER:
 485         return compile_member_expression(ctx, (member_expression_t*)expr, TRUE);
 486     case EXPR_MOD:
 487         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_mod);
 488     case EXPR_MUL:
 489         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_mul);
 490     case EXPR_NEG:
 491         return compile_unary_expression(ctx, (unary_expression_t*)expr, OP_neg);
 492     case EXPR_NEQUAL:
 493         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_nequal);
 494     case EXPR_NEW:
 495         return push_instr_str(ctx, OP_new, ((string_expression_t*)expr)->value);
 496     case EXPR_NOT:
 497         return compile_unary_expression(ctx, (unary_expression_t*)expr, OP_not);
 498     case EXPR_NOTHING:
 499         return push_instr(ctx, OP_nothing) ? S_OK : E_OUTOFMEMORY;
 500     case EXPR_NULL:
 501         return push_instr(ctx, OP_null) ? S_OK : E_OUTOFMEMORY;
 502     case EXPR_OR:
 503         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_or);
 504     case EXPR_STRING:
 505         return push_instr_str(ctx, OP_string, ((string_expression_t*)expr)->value);
 506     case EXPR_SUB:
 507         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_sub);
 508     case EXPR_USHORT:
 509         return push_instr_int(ctx, OP_short, ((int_expression_t*)expr)->value);
 510     case EXPR_ULONG:
 511         return push_instr_int(ctx, OP_long, ((int_expression_t*)expr)->value);
 512     case EXPR_XOR:
 513         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_xor);
 514     default:
 515         FIXME("Unimplemented expression type %d\n", expr->type);
 516         return E_NOTIMPL;
 517     }
 518
 519     return S_OK;
 520 }
 521
 522 static HRESULT compile_if_statement(compile_ctx_t *ctx, if_statement_t *stat)
 523 {
 524     unsigned cnd_jmp, endif_label = 0;
 525     elseif_decl_t *elseif_decl;
 526     HRESULT hres;
 527
 528     hres = compile_expression(ctx, stat->expr);
 529     if(FAILED(hres))
 530         return hres;
 531
 532     cnd_jmp = push_instr(ctx, OP_jmp_false);
 533     if(!cnd_jmp)
 534         return E_OUTOFMEMORY;
 535
 536     hres = compile_statement(ctx, NULL, stat->if_stat);
 537     if(FAILED(hres))
 538         return hres;
 539
 540     if(stat->else_stat || stat->elseifs) {
 541         endif_label = alloc_label(ctx);
 542         if(!endif_label)
 543             return E_OUTOFMEMORY;
 544
 545         hres = push_instr_addr(ctx, OP_jmp, endif_label);
 546         if(FAILED(hres))
 547             return hres;
 548     }
 549
 550     for(elseif_decl = stat->elseifs; elseif_decl; elseif_decl = elseif_decl->next) {
 551         instr_ptr(ctx, cnd_jmp)->arg1.uint = ctx->instr_cnt;
 552
 553         hres = compile_expression(ctx, elseif_decl->expr);
 554         if(FAILED(hres))
 555             return hres;
 556
 557         cnd_jmp = push_instr(ctx, OP_jmp_false);
 558         if(!cnd_jmp)
 559             return E_OUTOFMEMORY;
 560
 561         hres = compile_statement(ctx, NULL, elseif_decl->stat);
 562         if(FAILED(hres))
 563             return hres;
 564
 565         hres = push_instr_addr(ctx, OP_jmp, endif_label);
 566         if(FAILED(hres))
 567             return hres;
 568     }
 569
 570     instr_ptr(ctx, cnd_jmp)->arg1.uint = ctx->instr_cnt;
 571
 572     if(stat->else_stat) {
 573         hres = compile_statement(ctx, NULL, stat->else_stat);
 574         if(FAILED(hres))
 575             return hres;
 576     }
 577
 578     if(endif_label)
 579         label_set_addr(ctx, endif_label);
 580     return S_OK;
 581 }
 582
 583 static HRESULT compile_while_statement(compile_ctx_t *ctx, while_statement_t *stat)
 584 {
 585     statement_ctx_t stat_ctx = {0}, *loop_ctx;
 586     unsigned start_addr;
 587     unsigned jmp_end;
 588     HRESULT hres;
 589
 590     start_addr = ctx->instr_cnt;
 591
 592     hres = compile_expression(ctx, stat->expr);
 593     if(FAILED(hres))
 594         return hres;
 595
 596     jmp_end = push_instr(ctx, stat->stat.type == STAT_UNTIL ? OP_jmp_true : OP_jmp_false);
 597     if(!jmp_end)
 598         return E_OUTOFMEMORY;
 599
 600     if(stat->stat.type == STAT_WHILE) {
 601         loop_ctx = NULL;
 602     }else {
 603         if(!(stat_ctx.while_end_label = alloc_label(ctx)))
 604             return E_OUTOFMEMORY;
 605         loop_ctx = &stat_ctx;
 606     }
 607
 608     hres = compile_statement(ctx, loop_ctx, stat->body);
 609     if(FAILED(hres))
 610         return hres;
 611
 612     hres = push_instr_addr(ctx, OP_jmp, start_addr);
 613     if(FAILED(hres))
 614         return hres;
 615
 616     instr_ptr(ctx, jmp_end)->arg1.uint = ctx->instr_cnt;
 617
 618     if(loop_ctx)
 619         label_set_addr(ctx, stat_ctx.while_end_label);
 620
 621     return S_OK;
 622 }
 623
 624 static HRESULT compile_dowhile_statement(compile_ctx_t *ctx, while_statement_t *stat)
 625 {
 626     statement_ctx_t loop_ctx = {0};
 627     unsigned start_addr;
 628     vbsop_t jmp_op;
 629     HRESULT hres;
 630
 631     start_addr = ctx->instr_cnt;
 632
 633     if(!(loop_ctx.while_end_label = alloc_label(ctx)))
 634         return E_OUTOFMEMORY;
 635
 636     hres = compile_statement(ctx, &loop_ctx, stat->body);
 637     if(FAILED(hres))
 638         return hres;
 639
 640     if(stat->expr) {
 641         hres = compile_expression(ctx, stat->expr);
 642         if(FAILED(hres))
 643             return hres;
 644
 645         jmp_op = stat->stat.type == STAT_DOUNTIL ? OP_jmp_false : OP_jmp_true;
 646     }else {
 647         jmp_op = OP_jmp;
 648     }
 649
 650     hres = push_instr_addr(ctx, jmp_op, start_addr);
 651     if(FAILED(hres))
 652         return hres;
 653
 654     label_set_addr(ctx, loop_ctx.while_end_label);
 655     return S_OK;
 656 }
 657
 658 static HRESULT compile_foreach_statement(compile_ctx_t *ctx, foreach_statement_t *stat)
 659 {
 660     statement_ctx_t loop_ctx = {1};
 661     unsigned loop_start;
 662     HRESULT hres;
 663
 664     hres = compile_expression(ctx, stat->group_expr);
 665     if(FAILED(hres))
 666         return hres;
 667
 668     if(!push_instr(ctx, OP_newenum))
 669         return E_OUTOFMEMORY;
 670
 671     loop_start = ctx->instr_cnt;
 672     if(!(loop_ctx.for_end_label = alloc_label(ctx)))
 673         return E_OUTOFMEMORY;
 674
 675     hres = push_instr_uint_bstr(ctx, OP_enumnext, loop_ctx.for_end_label, stat->identifier);
 676     if(FAILED(hres))
 677         return hres;
 678
 679     hres = compile_statement(ctx, &loop_ctx, stat->body);
 680     if(FAILED(hres))
 681         return hres;
 682
 683     hres = push_instr_addr(ctx, OP_jmp, loop_start);
 684     if(FAILED(hres))
 685         return hres;
 686
 687     label_set_addr(ctx, loop_ctx.for_end_label);
 688     return S_OK;
 689 }
 690
 691 static HRESULT compile_forto_statement(compile_ctx_t *ctx, forto_statement_t *stat)
 692 {
 693     statement_ctx_t loop_ctx = {2};
 694     unsigned step_instr, instr;
 695     BSTR identifier;
 696     HRESULT hres;
 697
 698     identifier = alloc_bstr_arg(ctx, stat->identifier);
 699     if(!identifier)
 700         return E_OUTOFMEMORY;
 701
 702     hres = compile_expression(ctx, stat->from_expr);
 703     if(FAILED(hres))
 704         return hres;
 705
 706     instr = push_instr(ctx, OP_assign_ident);
 707     if(!instr)
 708         return E_OUTOFMEMORY;
 709     instr_ptr(ctx, instr)->arg1.bstr = identifier;
 710     instr_ptr(ctx, instr)->arg2.uint = 0;
 711
 712     hres = compile_expression(ctx, stat->to_expr);
 713     if(FAILED(hres))
 714         return hres;
 715
 716     if(!push_instr(ctx, OP_val))
 717         return E_OUTOFMEMORY;
 718
 719     if(stat->step_expr) {
 720         hres = compile_expression(ctx, stat->step_expr);
 721         if(FAILED(hres))
 722             return hres;
 723
 724         if(!push_instr(ctx, OP_val))
 725             return E_OUTOFMEMORY;
 726     }else {
 727         hres = push_instr_int(ctx, OP_short, 1);
 728         if(FAILED(hres))
 729             return hres;
 730     }
 731
 732     loop_ctx.for_end_label = alloc_label(ctx);
 733     if(!loop_ctx.for_end_label)
 734         return E_OUTOFMEMORY;
 735
 736     step_instr = push_instr(ctx, OP_step);
 737     if(!step_instr)
 738         return E_OUTOFMEMORY;
 739     instr_ptr(ctx, step_instr)->arg2.bstr = identifier;
 740     instr_ptr(ctx, step_instr)->arg1.uint = loop_ctx.for_end_label;
 741
 742     hres = compile_statement(ctx, &loop_ctx, stat->body);
 743     if(FAILED(hres))
 744         return hres;
 745
 746     instr = push_instr(ctx, OP_incc);
 747     if(!instr)
 748         return E_OUTOFMEMORY;
 749     instr_ptr(ctx, instr)->arg1.bstr = identifier;
 750
 751     hres = push_instr_addr(ctx, OP_jmp, step_instr);
 752     if(FAILED(hres))
 753         return hres;
 754
 755     hres = push_instr_uint(ctx, OP_pop, 2);
 756     if(FAILED(hres))
 757         return hres;
 758
 759     label_set_addr(ctx, loop_ctx.for_end_label);
 760     return S_OK;
 761 }
 762
 763 static HRESULT compile_select_statement(compile_ctx_t *ctx, select_statement_t *stat)
 764 {
 765     unsigned end_label, case_cnt = 0, *case_labels = NULL, i;
 766     case_clausule_t *case_iter;
 767     expression_t *expr_iter;
 768     HRESULT hres;
 769
 770     hres = compile_expression(ctx, stat->expr);
 771     if(FAILED(hres))
 772         return hres;
 773
 774     if(!push_instr(ctx, OP_val))
 775         return E_OUTOFMEMORY;
 776
 777     end_label = alloc_label(ctx);
 778     if(!end_label)
 779         return E_OUTOFMEMORY;
 780
 781     for(case_iter = stat->case_clausules; case_iter; case_iter = case_iter->next)
 782         case_cnt++;
 783
 784     if(case_cnt) {
 785         case_labels = heap_alloc(case_cnt*sizeof(*case_labels));
 786         if(!case_labels)
 787             return E_OUTOFMEMORY;
 788     }
 789
 790     for(case_iter = stat->case_clausules, i=0; case_iter; case_iter = case_iter->next, i++) {
 791         case_labels[i] = alloc_label(ctx);
 792         if(!case_labels[i]) {
 793             hres = E_OUTOFMEMORY;
 794             break;
 795         }
 796
 797         if(!case_iter->expr)
 798             break;
 799
 800         for(expr_iter = case_iter->expr; expr_iter; expr_iter = expr_iter->next) {
 801             hres = compile_expression(ctx, expr_iter);
 802             if(FAILED(hres))
 803                 break;
 804
 805             hres = push_instr_addr(ctx, OP_case, case_labels[i]);
 806             if(FAILED(hres))
 807                 break;
 808         }
 809     }
 810
 811     if(FAILED(hres)) {
 812         heap_free(case_labels);
 813         return hres;
 814     }
 815
 816     hres = push_instr_uint(ctx, OP_pop, 1);
 817     if(FAILED(hres)) {
 818         heap_free(case_labels);
 819         return hres;
 820     }
 821
 822     hres = push_instr_addr(ctx, OP_jmp, case_iter ? case_labels[i] : end_label);
 823     if(FAILED(hres)) {
 824         heap_free(case_labels);
 825         return hres;
 826     }
 827
 828     for(case_iter = stat->case_clausules, i=0; case_iter; case_iter = case_iter->next, i++) {
 829         label_set_addr(ctx, case_labels[i]);
 830         hres = compile_statement(ctx, NULL, case_iter->stat);
 831         if(FAILED(hres))
 832             break;
 833
 834         if(!case_iter->next)
 835             break;
 836
 837         hres = push_instr_addr(ctx, OP_jmp, end_label);
 838         if(FAILED(hres))
 839             break;
 840     }
 841
 842     heap_free(case_labels);
 843     if(FAILED(hres))
 844         return hres;
 845
 846     label_set_addr(ctx, end_label);
 847     return S_OK;
 848 }
 849
 850 static HRESULT compile_assignment(compile_ctx_t *ctx, member_expression_t *member_expr, expression_t *value_expr, BOOL is_set)
 851 {
 852     unsigned args_cnt;
 853     vbsop_t op;
 854     HRESULT hres;
 855
 856     if(member_expr->obj_expr) {
 857         hres = compile_expression(ctx, member_expr->obj_expr);
 858         if(FAILED(hres))
 859             return hres;
 860
 861         op = is_set ? OP_set_member : OP_assign_member;
 862     }else {
 863         op = is_set ? OP_set_ident : OP_assign_ident;
 864     }
 865
 866     hres = compile_expression(ctx, value_expr);
 867     if(FAILED(hres))
 868         return hres;
 869
 870     hres = compile_args(ctx, member_expr->args, &args_cnt);
 871     if(FAILED(hres))
 872         return hres;
 873
 874     return push_instr_bstr_uint(ctx, op, member_expr->identifier, args_cnt);
 875 }
 876
 877 static HRESULT compile_assign_statement(compile_ctx_t *ctx, assign_statement_t *stat, BOOL is_set)
 878 {
 879     return compile_assignment(ctx, stat->member_expr, stat->value_expr, is_set);
 880 }
 881
 882 static HRESULT compile_call_statement(compile_ctx_t *ctx, call_statement_t *stat)
 883 {
 884     /* It's challenging for parser to distinguish parameterized assignment with one argument from call
 885      * with equality expression argument, so we do it in compiler. */
 886     if(!stat->is_strict && stat->expr->args && !stat->expr->args->next && stat->expr->args->type == EXPR_EQUAL) {
 887         binary_expression_t *eqexpr = (binary_expression_t*)stat->expr->args;
 888
 889         if(eqexpr->left->type == EXPR_BRACKETS) {
 890             member_expression_t new_member = *stat->expr;
 891
 892             WARN("converting call expr to assign expr\n");
 893
 894             new_member.args = ((unary_expression_t*)eqexpr->left)->subexpr;
 895             return compile_assignment(ctx, &new_member, eqexpr->right, FALSE);
 896         }
 897     }
 898
 899     return compile_member_expression(ctx, stat->expr, FALSE);
 900 }
 901
 902 static BOOL lookup_dim_decls(compile_ctx_t *ctx, const WCHAR *name)
 903 {
 904     dim_decl_t *dim_decl;
 905
 906     for(dim_decl = ctx->dim_decls; dim_decl; dim_decl = dim_decl->next) {
 907         if(!strcmpiW(dim_decl->name, name))
 908             return TRUE;
 909     }
 910
 911     return FALSE;
 912 }
 913
 914 static BOOL lookup_args_name(compile_ctx_t *ctx, const WCHAR *name)
 915 {
 916     unsigned i;
 917
 918     for(i = 0; i < ctx->func->arg_cnt; i++) {
 919         if(!strcmpiW(ctx->func->args[i].name, name))
 920             return TRUE;
 921     }
 922
 923     return FALSE;
 924 }
 925
 926 static HRESULT compile_dim_statement(compile_ctx_t *ctx, dim_statement_t *stat)
 927 {
 928     dim_decl_t *dim_decl = stat->dim_decls;
 929
 930     while(1) {
 931         if(lookup_dim_decls(ctx, dim_decl->name) || lookup_args_name(ctx, dim_decl->name)
 932            || lookup_const_decls(ctx, dim_decl->name, FALSE)) {
 933             FIXME("dim %s name redefined\n", debugstr_w(dim_decl->name));
 934             return E_FAIL;
 935         }
 936
 937         ctx->func->var_cnt++;
 938         if(!dim_decl->next)
 939             break;
 940         dim_decl = dim_decl->next;
 941     }
 942
 943     dim_decl->next = ctx->dim_decls;
 944     ctx->dim_decls = stat->dim_decls;
 945     return S_OK;
 946 }
 947
 948 static HRESULT compile_const_statement(compile_ctx_t *ctx, const_statement_t *stat)
 949 {
 950     const_decl_t *decl, *next_decl = stat->decls;
 951
 952     do {
 953         decl = next_decl;
 954
 955         if(lookup_const_decls(ctx, decl->name, FALSE) || lookup_args_name(ctx, decl->name)
 956                 || lookup_dim_decls(ctx, decl->name)) {
 957             FIXME("%s redefined\n", debugstr_w(decl->name));
 958             return E_FAIL;
 959         }
 960
 961         if(ctx->func->type == FUNC_GLOBAL) {
 962             HRESULT hres;
 963
 964             hres = compile_expression(ctx, decl->value_expr);
 965             if(FAILED(hres))
 966                 return hres;
 967
 968             hres = push_instr_bstr(ctx, OP_const, decl->name);
 969             if(FAILED(hres))
 970                 return hres;
 971         }
 972
 973         next_decl = decl->next;
 974         decl->next = ctx->const_decls;
 975         ctx->const_decls = decl;
 976     } while(next_decl);
 977
 978     return S_OK;
 979 }
 980
 981 static HRESULT compile_function_statement(compile_ctx_t *ctx, function_statement_t *stat)
 982 {
 983     if(ctx->func != &ctx->code->main_code) {
 984         FIXME("Function is not in the global code\n");
 985         return E_FAIL;
 986     }
 987
 988     stat->func_decl->next = ctx->func_decls;
 989     ctx->func_decls = stat->func_decl;
 990     return S_OK;
 991 }
 992
 993 static HRESULT compile_exitdo_statement(compile_ctx_t *ctx)
 994 {
 995     statement_ctx_t *iter;
 996     unsigned pop_cnt = 0;
 997
 998     for(iter = ctx->stat_ctx; iter; iter = iter->next) {
 999         pop_cnt += iter->stack_use;
1000         if(iter->while_end_label)
1001             break;
1002     }
1003     if(!iter) {
1004         FIXME("Exit Do outside Do Loop\n");
1005         return E_FAIL;
1006     }
1007
1008     if(pop_cnt) {
1009         HRESULT hres;
1010
1011         hres = push_instr_uint(ctx, OP_pop, pop_cnt);
1012         if(FAILED(hres))
1013             return hres;
1014     }
1015
1016     return push_instr_addr(ctx, OP_jmp, iter->while_end_label);
1017 }
1018
1019 static HRESULT compile_exitfor_statement(compile_ctx_t *ctx)
1020 {
1021     statement_ctx_t *iter;
1022     unsigned pop_cnt = 0;
1023
1024     for(iter = ctx->stat_ctx; iter; iter = iter->next) {
1025         pop_cnt += iter->stack_use;
1026         if(iter->for_end_label)
1027             break;
1028     }
1029     if(!iter) {
1030         FIXME("Exit For outside For loop\n");
1031         return E_FAIL;
1032     }
1033
1034     if(pop_cnt) {
1035         HRESULT hres;
1036
1037         hres = push_instr_uint(ctx, OP_pop, pop_cnt);
1038         if(FAILED(hres))
1039             return hres;
1040     }
1041
1042     return push_instr_addr(ctx, OP_jmp, iter->for_end_label);
1043 }
1044
1045 static HRESULT exit_label(compile_ctx_t *ctx, unsigned jmp_label)
1046 {
1047     statement_ctx_t *iter;
1048     unsigned pop_cnt = 0;
1049
1050     for(iter = ctx->stat_ctx; iter; iter = iter->next)
1051         pop_cnt += iter->stack_use;
1052
1053     if(pop_cnt) {
1054         HRESULT hres;
1055
1056         hres = push_instr_uint(ctx, OP_pop, pop_cnt);
1057         if(FAILED(hres))
1058             return hres;
1059     }
1060
1061     return push_instr_addr(ctx, OP_jmp, jmp_label);
1062 }
1063
1064 static HRESULT compile_exitsub_statement(compile_ctx_t *ctx)
1065 {
1066     if(!ctx->sub_end_label) {
1067         FIXME("Exit Sub outside Sub?\n");
1068         return E_FAIL;
1069     }
1070
1071     return exit_label(ctx, ctx->sub_end_label);
1072 }
1073
1074 static HRESULT compile_exitfunc_statement(compile_ctx_t *ctx)
1075 {
1076     if(!ctx->func_end_label) {
1077         FIXME("Exit Function outside Function?\n");
1078         return E_FAIL;
1079     }
1080
1081     return exit_label(ctx, ctx->func_end_label);
1082 }
1083
1084 static HRESULT compile_exitprop_statement(compile_ctx_t *ctx)
1085 {
1086     if(!ctx->prop_end_label) {
1087         FIXME("Exit Property outside Property?\n");
1088         return E_FAIL;
1089     }
1090
1091     return exit_label(ctx, ctx->prop_end_label);
1092 }
1093
1094 static HRESULT compile_onerror_statement(compile_ctx_t *ctx, onerror_statement_t *stat)
1095 {
1096     return push_instr_int(ctx, OP_errmode, stat->resume_next);
1097 }
1098
1099 static HRESULT compile_statement(compile_ctx_t *ctx, statement_ctx_t *stat_ctx, statement_t *stat)
1100 {
1101     HRESULT hres;
1102
1103     if(stat_ctx) {
1104         stat_ctx->next = ctx->stat_ctx;
1105         ctx->stat_ctx = stat_ctx;
1106     }
1107
1108     while(stat) {
1109         switch(stat->type) {
1110         case STAT_ASSIGN:
1111             hres = compile_assign_statement(ctx, (assign_statement_t*)stat, FALSE);
1112             break;
1113         case STAT_CALL:
1114             hres = compile_call_statement(ctx, (call_statement_t*)stat);
1115             break;
1116         case STAT_CONST:
1117             hres = compile_const_statement(ctx, (const_statement_t*)stat);
1118             break;
1119         case STAT_DIM:
1120             hres = compile_dim_statement(ctx, (dim_statement_t*)stat);
1121             break;
1122         case STAT_DOWHILE:
1123         case STAT_DOUNTIL:
1124             hres = compile_dowhile_statement(ctx, (while_statement_t*)stat);
1125             break;
1126         case STAT_EXITDO:
1127             hres = compile_exitdo_statement(ctx);
1128             break;
1129         case STAT_EXITFOR:
1130             hres = compile_exitfor_statement(ctx);
1131             break;
1132         case STAT_EXITFUNC:
1133             hres = compile_exitfunc_statement(ctx);
1134             break;
1135         case STAT_EXITPROP:
1136             hres = compile_exitprop_statement(ctx);
1137             break;
1138         case STAT_EXITSUB:
1139             hres = compile_exitsub_statement(ctx);
1140             break;
1141         case STAT_FOREACH:
1142             hres = compile_foreach_statement(ctx, (foreach_statement_t*)stat);
1143             break;
1144         case STAT_FORTO:
1145             hres = compile_forto_statement(ctx, (forto_statement_t*)stat);
1146             break;
1147         case STAT_FUNC:
1148             hres = compile_function_statement(ctx, (function_statement_t*)stat);
1149             break;
1150         case STAT_IF:
1151             hres = compile_if_statement(ctx, (if_statement_t*)stat);
1152             break;
1153         case STAT_ONERROR:
1154             hres = compile_onerror_statement(ctx, (onerror_statement_t*)stat);
1155             break;
1156         case STAT_SELECT:
1157             hres = compile_select_statement(ctx, (select_statement_t*)stat);
1158             break;
1159         case STAT_SET:
1160             hres = compile_assign_statement(ctx, (assign_statement_t*)stat, TRUE);
1161             break;
1162         case STAT_STOP:
1163             hres = push_instr(ctx, OP_stop) ? S_OK : E_OUTOFMEMORY;
1164             break;
1165         case STAT_UNTIL:
1166         case STAT_WHILE:
1167         case STAT_WHILELOOP:
1168             hres = compile_while_statement(ctx, (while_statement_t*)stat);
1169             break;
1170         default:
1171             FIXME("Unimplemented statement type %d\n", stat->type);
1172             hres = E_NOTIMPL;
1173         }
1174
1175         if(FAILED(hres))
1176             return hres;
1177         stat = stat->next;
1178     }
1179
1180     if(stat_ctx) {
1181         assert(ctx->stat_ctx == stat_ctx);
1182         ctx->stat_ctx = stat_ctx->next;
1183     }
1184
1185     return S_OK;
1186 }
1187
1188 static void resolve_labels(compile_ctx_t *ctx, unsigned off)
1189 {
1190     instr_t *instr;
1191
1192     for(instr = ctx->code->instrs+off; instr < ctx->code->instrs+ctx->instr_cnt; instr++) {
1193         if(instr_info[instr->op].arg1_type == ARG_ADDR && (instr->arg1.uint & LABEL_FLAG)) {
1194             assert((instr->arg1.uint & ~LABEL_FLAG) < ctx->labels_cnt);
1195             instr->arg1.uint = ctx->labels[instr->arg1.uint & ~LABEL_FLAG];
1196         }
1197         assert(instr_info[instr->op].arg2_type != ARG_ADDR);
1198     }
1199
1200     ctx->labels_cnt = 0;
1201 }
1202
1203 static HRESULT compile_func(compile_ctx_t *ctx, statement_t *stat, function_t *func)
1204 {
1205     HRESULT hres;
1206
1207     func->code_off = ctx->instr_cnt;
1208
1209     ctx->sub_end_label = 0;
1210     ctx->func_end_label = 0;
1211     ctx->prop_end_label = 0;
1212
1213     switch(func->type) {
1214     case FUNC_FUNCTION:
1215         ctx->func_end_label = alloc_label(ctx);
1216         if(!ctx->func_end_label)
1217             return E_OUTOFMEMORY;
1218         break;
1219     case FUNC_SUB:
1220         ctx->sub_end_label = alloc_label(ctx);
1221         if(!ctx->sub_end_label)
1222             return E_OUTOFMEMORY;
1223         break;
1224     case FUNC_PROPGET:
1225     case FUNC_PROPLET:
1226     case FUNC_PROPSET:
1227     case FUNC_DEFGET:
1228         ctx->prop_end_label = alloc_label(ctx);
1229         if(!ctx->prop_end_label)
1230             return E_OUTOFMEMORY;
1231         break;
1232     case FUNC_GLOBAL:
1233         break;
1234     }
1235
1236     ctx->func = func;
1237     ctx->dim_decls = NULL;
1238     ctx->const_decls = NULL;
1239     hres = compile_statement(ctx, NULL, stat);
1240     ctx->func = NULL;
1241     if(FAILED(hres))
1242         return hres;
1243
1244     if(ctx->sub_end_label)
1245         label_set_addr(ctx, ctx->sub_end_label);
1246     if(ctx->func_end_label)
1247         label_set_addr(ctx, ctx->func_end_label);
1248     if(ctx->prop_end_label)
1249         label_set_addr(ctx, ctx->prop_end_label);
1250
1251     if(!push_instr(ctx, OP_ret))
1252         return E_OUTOFMEMORY;
1253
1254     resolve_labels(ctx, func->code_off);
1255
1256     if(func->var_cnt) {
1257         dim_decl_t *dim_decl;
1258
1259         if(func->type == FUNC_GLOBAL) {
1260             dynamic_var_t *new_var;
1261
1262             func->var_cnt = 0;
1263
1264             for(dim_decl = ctx->dim_decls; dim_decl; dim_decl = dim_decl->next) {
1265                 new_var = compiler_alloc(ctx->code, sizeof(*new_var));
1266                 if(!new_var)
1267                     return E_OUTOFMEMORY;
1268
1269                 new_var->name = compiler_alloc_string(ctx->code, dim_decl->name);
1270                 if(!new_var->name)
1271                     return E_OUTOFMEMORY;
1272
1273                 V_VT(&new_var->v) = VT_EMPTY;
1274                 new_var->is_const = FALSE;
1275
1276                 new_var->next = ctx->global_vars;
1277                 ctx->global_vars = new_var;
1278             }
1279         }else {
1280             unsigned i;
1281
1282             func->vars = compiler_alloc(ctx->code, func->var_cnt * sizeof(var_desc_t));
1283             if(!func->vars)
1284                 return E_OUTOFMEMORY;
1285
1286             for(dim_decl = ctx->dim_decls, i=0; dim_decl; dim_decl = dim_decl->next, i++) {
1287                 func->vars[i].name = compiler_alloc_string(ctx->code, dim_decl->name);
1288                 if(!func->vars[i].name)
1289                     return E_OUTOFMEMORY;
1290             }
1291
1292             assert(i == func->var_cnt);
1293         }
1294     }
1295
1296     return S_OK;
1297 }
1298
1299 static BOOL lookup_funcs_name(compile_ctx_t *ctx, const WCHAR *name)
1300 {
1301     function_t *iter;
1302
1303     for(iter = ctx->funcs; iter; iter = iter->next) {
1304         if(!strcmpiW(iter->name, name))
1305             return TRUE;
1306     }
1307
1308     return FALSE;
1309 }
1310
1311 static HRESULT create_function(compile_ctx_t *ctx, function_decl_t *decl, function_t **ret)
1312 {
1313     function_t *func;
1314     HRESULT hres;
1315
1316     if(lookup_dim_decls(ctx, decl->name) || lookup_funcs_name(ctx, decl->name) || lookup_const_decls(ctx, decl->name, FALSE)) {
1317         FIXME("%s: redefinition\n", debugstr_w(decl->name));
1318         return E_FAIL;
1319     }
1320
1321     func = compiler_alloc(ctx->code, sizeof(*func));
1322     if(!func)
1323         return E_OUTOFMEMORY;
1324
1325     func->name = compiler_alloc_string(ctx->code, decl->name);
1326     if(!func->name)
1327         return E_OUTOFMEMORY;
1328
1329     func->vars = NULL;
1330     func->var_cnt = 0;
1331     func->code_ctx = ctx->code;
1332     func->type = decl->type;
1333     func->is_public = decl->is_public;
1334
1335     func->arg_cnt = 0;
1336     if(decl->args) {
1337         arg_decl_t *arg;
1338         unsigned i;
1339
1340         for(arg = decl->args; arg; arg = arg->next)
1341             func->arg_cnt++;
1342
1343         func->args = compiler_alloc(ctx->code, func->arg_cnt * sizeof(arg_desc_t));
1344         if(!func->args)
1345             return E_OUTOFMEMORY;
1346
1347         for(i = 0, arg = decl->args; arg; arg = arg->next, i++) {
1348             func->args[i].name = compiler_alloc_string(ctx->code, arg->name);
1349             if(!func->args[i].name)
1350                 return E_OUTOFMEMORY;
1351             func->args[i].by_ref = arg->by_ref;
1352         }
1353     }else {
1354         func->args = NULL;
1355     }
1356
1357     hres = compile_func(ctx, decl->body, func);
1358     if(FAILED(hres))
1359         return hres;
1360
1361     *ret = func;
1362     return S_OK;
1363 }
1364
1365 static BOOL lookup_class_name(compile_ctx_t *ctx, const WCHAR *name)
1366 {
1367     class_desc_t *iter;
1368
1369     for(iter = ctx->classes; iter; iter = iter->next) {
1370         if(!strcmpiW(iter->name, name))
1371             return TRUE;
1372     }
1373
1374     return FALSE;
1375 }
1376
1377 static HRESULT create_class_funcprop(compile_ctx_t *ctx, function_decl_t *func_decl, vbdisp_funcprop_desc_t *desc)
1378 {
1379     vbdisp_invoke_type_t invoke_type;
1380     function_decl_t *funcprop_decl;
1381     HRESULT hres;
1382
1383     desc->name = compiler_alloc_string(ctx->code, func_decl->name);
1384     if(!desc->name)
1385         return E_OUTOFMEMORY;
1386
1387     for(funcprop_decl = func_decl; funcprop_decl; funcprop_decl = funcprop_decl->next_prop_func) {
1388         switch(funcprop_decl->type) {
1389         case FUNC_FUNCTION:
1390         case FUNC_SUB:
1391         case FUNC_PROPGET:
1392         case FUNC_DEFGET:
1393             invoke_type = VBDISP_CALLGET;
1394             break;
1395         case FUNC_PROPLET:
1396             invoke_type = VBDISP_LET;
1397             break;
1398         case FUNC_PROPSET:
1399             invoke_type = VBDISP_SET;
1400             break;
1401         default:
1402             assert(0);
1403         }
1404
1405         assert(!desc->entries[invoke_type]);
1406
1407         if(funcprop_decl->is_public)
1408             desc->is_public = TRUE;
1409
1410         hres = create_function(ctx, funcprop_decl, desc->entries+invoke_type);
1411         if(FAILED(hres))
1412             return hres;
1413     }
1414
1415     return S_OK;
1416 }
1417
1418 static BOOL lookup_class_funcs(class_desc_t *class_desc, const WCHAR *name)
1419 {
1420     unsigned i;
1421
1422     for(i=0; i < class_desc->func_cnt; i++) {
1423         if(class_desc->funcs[i].name && !strcmpiW(class_desc->funcs[i].name, name))
1424             return TRUE;
1425     }
1426
1427     return FALSE;
1428 }
1429
1430 static HRESULT compile_class(compile_ctx_t *ctx, class_decl_t *class_decl)
1431 {
1432     function_decl_t *func_decl, *func_prop_decl;
1433     class_prop_decl_t *prop_decl;
1434     class_desc_t *class_desc;
1435     unsigned i;
1436     HRESULT hres;
1437
1438     static const WCHAR class_initializeW[] = {'c','l','a','s','s','_','i','n','i','t','i','a','l','i','z','e',0};
1439     static const WCHAR class_terminateW[] = {'c','l','a','s','s','_','t','e','r','m','i','n','a','t','e',0};
1440
1441     if(lookup_dim_decls(ctx, class_decl->name) || lookup_funcs_name(ctx, class_decl->name)
1442             || lookup_const_decls(ctx, class_decl->name, FALSE) || lookup_class_name(ctx, class_decl->name)) {
1443         FIXME("%s: redefinition\n", debugstr_w(class_decl->name));
1444         return E_FAIL;
1445     }
1446
1447     class_desc = compiler_alloc_zero(ctx->code, sizeof(*class_desc));
1448     if(!class_desc)
1449         return E_OUTOFMEMORY;
1450
1451     class_desc->name = compiler_alloc_string(ctx->code, class_decl->name);
1452     if(!class_desc->name)
1453         return E_OUTOFMEMORY;
1454
1455     class_desc->func_cnt = 1; /* always allocate slot for default getter */
1456
1457     for(func_decl = class_decl->funcs; func_decl; func_decl = func_decl->next) {
1458         for(func_prop_decl = func_decl; func_prop_decl; func_prop_decl = func_prop_decl->next_prop_func) {
1459             if(func_prop_decl->type == FUNC_DEFGET)
1460                 break;
1461         }
1462         if(!func_prop_decl)
1463             class_desc->func_cnt++;
1464     }
1465
1466     class_desc->funcs = compiler_alloc(ctx->code, class_desc->func_cnt*sizeof(*class_desc->funcs));
1467     if(!class_desc->funcs)
1468         return E_OUTOFMEMORY;
1469     memset(class_desc->funcs, 0, class_desc->func_cnt*sizeof(*class_desc->funcs));
1470
1471     for(func_decl = class_decl->funcs, i=1; func_decl; func_decl = func_decl->next, i++) {
1472         for(func_prop_decl = func_decl; func_prop_decl; func_prop_decl = func_prop_decl->next_prop_func) {
1473             if(func_prop_decl->type == FUNC_DEFGET) {
1474                 i--;
1475                 break;
1476             }
1477         }
1478
1479         if(!strcmpiW(class_initializeW, func_decl->name)) {
1480             if(func_decl->type != FUNC_SUB) {
1481                 FIXME("class initializer is not sub\n");
1482                 return E_FAIL;
1483             }
1484
1485             class_desc->class_initialize_id = i;
1486         }else  if(!strcmpiW(class_terminateW, func_decl->name)) {
1487             if(func_decl->type != FUNC_SUB) {
1488                 FIXME("class terminator is not sub\n");
1489                 return E_FAIL;
1490             }
1491
1492             class_desc->class_terminate_id = i;
1493         }
1494
1495         hres = create_class_funcprop(ctx, func_decl, class_desc->funcs + (func_prop_decl ? 0 : i));
1496         if(FAILED(hres))
1497             return hres;
1498     }
1499
1500     for(prop_decl = class_decl->props; prop_decl; prop_decl = prop_decl->next)
1501         class_desc->prop_cnt++;
1502
1503     class_desc->props = compiler_alloc(ctx->code, class_desc->prop_cnt*sizeof(*class_desc->props));
1504     if(!class_desc->props)
1505         return E_OUTOFMEMORY;
1506
1507     for(prop_decl = class_decl->props, i=0; prop_decl; prop_decl = prop_decl->next, i++) {
1508         if(lookup_class_funcs(class_desc, prop_decl->name)) {
1509             FIXME("Property %s redefined\n", debugstr_w(prop_decl->name));
1510             return E_FAIL;
1511         }
1512
1513         class_desc->props[i].name = compiler_alloc_string(ctx->code, prop_decl->name);
1514         if(!class_desc->props[i].name)
1515             return E_OUTOFMEMORY;
1516
1517         class_desc->props[i].is_public = prop_decl->is_public;
1518     }
1519
1520     class_desc->next = ctx->classes;
1521     ctx->classes = class_desc;
1522     return S_OK;
1523 }
1524
1525 static BOOL lookup_script_identifier(script_ctx_t *script, const WCHAR *identifier)
1526 {
1527     class_desc_t *class;
1528     dynamic_var_t *var;
1529     function_t *func;
1530
1531     for(var = script->global_vars; var; var = var->next) {
1532         if(!strcmpiW(var->name, identifier))
1533             return TRUE;
1534     }
1535
1536     for(func = script->global_funcs; func; func = func->next) {
1537         if(!strcmpiW(func->name, identifier))
1538             return TRUE;
1539     }
1540
1541     for(class = script->classes; class; class = class->next) {
1542         if(!strcmpiW(class->name, identifier))
1543             return TRUE;
1544     }
1545
1546     return FALSE;
1547 }
1548
1549 static HRESULT check_script_collisions(compile_ctx_t *ctx, script_ctx_t *script)
1550 {
1551     class_desc_t *class;
1552     dynamic_var_t *var;
1553     function_t *func;
1554
1555     for(var = ctx->global_vars; var; var = var->next) {
1556         if(lookup_script_identifier(script, var->name)) {
1557             FIXME("%s: redefined\n", debugstr_w(var->name));
1558             return E_FAIL;
1559         }
1560     }
1561
1562     for(func = ctx->funcs; func; func = func->next) {
1563         if(lookup_script_identifier(script, func->name)) {
1564             FIXME("%s: redefined\n", debugstr_w(func->name));
1565             return E_FAIL;
1566         }
1567     }
1568
1569     for(class = ctx->classes; class; class = class->next) {
1570         if(lookup_script_identifier(script, class->name)) {
1571             FIXME("%s: redefined\n", debugstr_w(class->name));
1572             return E_FAIL;
1573         }
1574     }
1575
1576     return S_OK;
1577 }
1578
1579 void release_vbscode(vbscode_t *code)
1580 {
1581     unsigned i;
1582
1583     list_remove(&code->entry);
1584
1585     for(i=0; i < code->bstr_cnt; i++)
1586         SysFreeString(code->bstr_pool[i]);
1587
1588     vbsheap_free(&code->heap);
1589
1590     heap_free(code->bstr_pool);
1591     heap_free(code->source);
1592     heap_free(code->instrs);
1593     heap_free(code);
1594 }
1595
1596 static vbscode_t *alloc_vbscode(compile_ctx_t *ctx, const WCHAR *source)
1597 {
1598     vbscode_t *ret;
1599
1600     ret = heap_alloc(sizeof(*ret));
1601     if(!ret)
1602         return NULL;
1603
1604     ret->source = heap_strdupW(source);
1605     if(!ret->source) {
1606         heap_free(ret);
1607         return NULL;
1608     }
1609
1610     ret->instrs = heap_alloc(32*sizeof(instr_t));
1611     if(!ret->instrs) {
1612         release_vbscode(ret);
1613         return NULL;
1614     }
1615
1616     ctx->instr_cnt = 1;
1617     ctx->instr_size = 32;
1618     vbsheap_init(&ret->heap);
1619
1620     ret->option_explicit = ctx->parser.option_explicit;
1621
1622     ret->bstr_pool = NULL;
1623     ret->bstr_pool_size = 0;
1624     ret->bstr_cnt = 0;
1625     ret->pending_exec = FALSE;
1626
1627     ret->main_code.type = FUNC_GLOBAL;
1628     ret->main_code.name = NULL;
1629     ret->main_code.code_ctx = ret;
1630     ret->main_code.vars = NULL;
1631     ret->main_code.var_cnt = 0;
1632     ret->main_code.arg_cnt = 0;
1633     ret->main_code.args = NULL;
1634
1635     list_init(&ret->entry);
1636     return ret;
1637 }
1638
1639 static void release_compiler(compile_ctx_t *ctx)
1640 {
1641     parser_release(&ctx->parser);
1642     heap_free(ctx->labels);
1643     if(ctx->code)
1644         release_vbscode(ctx->code);
1645 }
1646
1647 HRESULT compile_script(script_ctx_t *script, const WCHAR *src, const WCHAR *delimiter, vbscode_t **ret)
1648 {
1649     function_t *new_func;
1650     function_decl_t *func_decl;
1651     class_decl_t *class_decl;
1652     compile_ctx_t ctx;
1653     vbscode_t *code;
1654     HRESULT hres;
1655
1656     hres = parse_script(&ctx.parser, src, delimiter);
1657     if(FAILED(hres))
1658         return hres;
1659
1660     code = ctx.code = alloc_vbscode(&ctx, src);
1661     if(!ctx.code)
1662         return E_OUTOFMEMORY;
1663
1664     ctx.funcs = NULL;
1665     ctx.func_decls = NULL;
1666     ctx.global_vars = NULL;
1667     ctx.dim_decls = NULL;
1668     ctx.classes = NULL;
1669     ctx.labels = NULL;
1670     ctx.global_consts = NULL;
1671     ctx.stat_ctx = NULL;
1672     ctx.labels_cnt = ctx.labels_size = 0;
1673
1674     hres = compile_func(&ctx, ctx.parser.stats, &ctx.code->main_code);
1675     if(FAILED(hres)) {
1676         release_compiler(&ctx);
1677         return hres;
1678     }
1679
1680     ctx.global_consts = ctx.const_decls;
1681
1682     for(func_decl = ctx.func_decls; func_decl; func_decl = func_decl->next) {
1683         hres = create_function(&ctx, func_decl, &new_func);
1684         if(FAILED(hres)) {
1685             release_compiler(&ctx);
1686             return hres;
1687         }
1688
1689         new_func->next = ctx.funcs;
1690         ctx.funcs = new_func;
1691     }
1692
1693     for(class_decl = ctx.parser.class_decls; class_decl; class_decl = class_decl->next) {
1694         hres = compile_class(&ctx, class_decl);
1695         if(FAILED(hres)) {
1696             release_compiler(&ctx);
1697             return hres;
1698         }
1699     }
1700
1701     hres = check_script_collisions(&ctx, script);
1702     if(FAILED(hres)) {
1703         release_compiler(&ctx);
1704         return hres;
1705     }
1706
1707     if(ctx.global_vars) {
1708         dynamic_var_t *var;
1709
1710         for(var = ctx.global_vars; var->next; var = var->next);
1711
1712         var->next = script->global_vars;
1713         script->global_vars = ctx.global_vars;
1714     }
1715
1716     if(ctx.funcs) {
1717         for(new_func = ctx.funcs; new_func->next; new_func = new_func->next);
1718
1719         new_func->next = script->global_funcs;
1720         script->global_funcs = ctx.funcs;
1721     }
1722
1723     if(ctx.classes) {
1724         class_desc_t *class = ctx.classes;
1725
1726         while(1) {
1727             class->ctx = script;
1728             if(!class->next)
1729                 break;
1730             class = class->next;
1731         }
1732
1733         class->next = script->classes;
1734         script->classes = ctx.classes;
1735     }
1736
1737     if(TRACE_ON(vbscript_disas))
1738         dump_code(&ctx);
1739
1740     ctx.code = NULL;
1741     release_compiler(&ctx);
1742
1743     list_add_tail(&script->code_list, &code->entry);
1744     *ret = code;
1745     return S_OK;
1746 }