nsz Git - cparser/blob - ast.c

   1 #include <config.h>
   2
   3 #include "ast_t.h"
   4 #include "type_t.h"
   5
   6 #include <assert.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <ctype.h>
  10
  11 #include "adt/error.h"
  12
  13 struct obstack ast_obstack;
  14
  15 static FILE *out;
  16 static int   indent;
  17
  18 static void print_statement(const statement_t *statement);
  19
  20 void change_indent(int delta)
  21 {
  22         indent += delta;
  23         assert(indent >= 0);
  24 }
  25
  26 void print_indent(void)
  27 {
  28         for(int i = 0; i < indent; ++i)
  29                 fprintf(out, "\t");
  30 }
  31
  32 static void print_const(const const_expression_t *cnst)
  33 {
  34         if(cnst->expression.datatype == NULL)
  35                 return;
  36
  37         if(is_type_integer(cnst->expression.datatype)) {
  38                 fprintf(out, "%lld", cnst->v.int_value);
  39         } else if(is_type_floating(cnst->expression.datatype)) {
  40                 fprintf(out, "%Lf", cnst->v.float_value);
  41         }
  42 }
  43
  44 static void print_quoted_string(const char *string)
  45 {
  46         fputc('"', out);
  47         for(const char *c = string; *c != '\0'; ++c) {
  48                 switch(*c) {
  49                 case '\"':  fputs("\\\"", out); break;
  50                 case '\\':  fputs("\\\\", out); break;
  51                 case '\a':  fputs("\\a", out); break;
  52                 case '\b':  fputs("\\b", out); break;
  53                 case '\f':  fputs("\\f", out); break;
  54                 case '\n':  fputs("\\n", out); break;
  55                 case '\r':  fputs("\\r", out); break;
  56                 case '\t':  fputs("\\t", out); break;
  57                 case '\v':  fputs("\\v", out); break;
  58                 case '\?':  fputs("\\?", out); break;
  59                 default:
  60                         if(!isprint(*c)) {
  61                                 fprintf(out, "\\x%x", *c);
  62                                 break;
  63                         }
  64                         fputc(*c, out);
  65                         break;
  66                 }
  67         }
  68         fputc('"', out);
  69 }
  70
  71 static void print_string_literal(
  72                 const string_literal_expression_t *string_literal)
  73 {
  74         print_quoted_string(string_literal->value);
  75 }
  76
  77 static void print_wide_string_literal(
  78         const wide_string_literal_expression_t *const wstr)
  79 {
  80         fputs("L\"", out);
  81         for (const wchar_rep_t *c   = wstr->value.begin,
  82                                *end = c + wstr->value.size;
  83              c != end; ++c) {
  84                 switch (*c) {
  85                         case L'\"':  fputs("\\\"", out); break;
  86                         case L'\\':  fputs("\\\\", out); break;
  87                         case L'\a':  fputs("\\a",  out); break;
  88                         case L'\b':  fputs("\\b",  out); break;
  89                         case L'\f':  fputs("\\f",  out); break;
  90                         case L'\n':  fputs("\\n",  out); break;
  91                         case L'\r':  fputs("\\r",  out); break;
  92                         case L'\t':  fputs("\\t",  out); break;
  93                         case L'\v':  fputs("\\v",  out); break;
  94                         case L'\?':  fputs("\\?",  out); break;
  95                         default: {
  96                                 const unsigned tc = *c;
  97                                 if (tc < 0x80U) {
  98                                         if (!isprint(*c))  {
  99                                                 fprintf(out, "\\%03o", (char)*c);
 100                                         } else {
 101                                                 fputc(*c, out);
 102                                         }
 103                                 } else if (tc < 0x800) {
 104                                         fputc(0xC0 | (tc >> 6),   out);
 105                                         fputc(0x80 | (tc & 0x3F), out);
 106                                 } else if (tc < 0x10000) {
 107                                         fputc(0xE0 | ( tc >> 12),         out);
 108                                         fputc(0x80 | ((tc >>  6) & 0x3F), out);
 109                                         fputc(0x80 | ( tc        & 0x3F), out);
 110                                 } else {
 111                                         fputc(0xF0 | ( tc >> 18),         out);
 112                                         fputc(0x80 | ((tc >> 12) & 0x3F), out);
 113                                         fputc(0x80 | ((tc >>  6) & 0x3F), out);
 114                                         fputc(0x80 | ( tc        & 0x3F), out);
 115                                 }
 116                         }
 117                 }
 118         }
 119         fputc('"', out);
 120 }
 121
 122 static void print_call_expression(const call_expression_t *call)
 123 {
 124         print_expression(call->function);
 125         fprintf(out, "(");
 126         call_argument_t *argument = call->arguments;
 127         int              first    = 1;
 128         while(argument != NULL) {
 129                 if(!first) {
 130                         fprintf(out, ", ");
 131                 } else {
 132                         first = 0;
 133                 }
 134                 print_expression(argument->expression);
 135
 136                 argument = argument->next;
 137         }
 138         fprintf(out, ")");
 139 }
 140
 141 static void print_binary_expression(const binary_expression_t *binexpr)
 142 {
 143         fprintf(out, "(");
 144         print_expression(binexpr->left);
 145         fprintf(out, " ");
 146         switch(binexpr->expression.type) {
 147         case EXPR_BINARY_COMMA:              fputs(",", out);     break;
 148         case EXPR_BINARY_ASSIGN:             fputs("=", out);     break;
 149         case EXPR_BINARY_ADD:                fputs("+", out);     break;
 150         case EXPR_BINARY_SUB:                fputs("-", out);     break;
 151         case EXPR_BINARY_MUL:                fputs("*", out);     break;
 152         case EXPR_BINARY_MOD:                fputs("%", out);     break;
 153         case EXPR_BINARY_DIV:                fputs("/", out);     break;
 154         case EXPR_BINARY_BITWISE_OR:         fputs("|", out);     break;
 155         case EXPR_BINARY_BITWISE_AND:        fputs("&", out);     break;
 156         case EXPR_BINARY_BITWISE_XOR:        fputs("^", out);     break;
 157         case EXPR_BINARY_LOGICAL_OR:         fputs("||", out);    break;
 158         case EXPR_BINARY_LOGICAL_AND:        fputs("&&", out);    break;
 159         case EXPR_BINARY_NOTEQUAL:           fputs("!=", out);    break;
 160         case EXPR_BINARY_EQUAL:              fputs("==", out);    break;
 161         case EXPR_BINARY_LESS:               fputs("<", out);     break;
 162         case EXPR_BINARY_LESSEQUAL:          fputs("<=", out);    break;
 163         case EXPR_BINARY_GREATER:            fputs(">", out);     break;
 164         case EXPR_BINARY_GREATEREQUAL:       fputs(">=", out);    break;
 165         case EXPR_BINARY_SHIFTLEFT:          fputs("<<", out);    break;
 166         case EXPR_BINARY_SHIFTRIGHT:         fputs(">>", out);    break;
 167
 168         case EXPR_BINARY_ADD_ASSIGN:         fputs("+=", out);    break;
 169         case EXPR_BINARY_SUB_ASSIGN:         fputs("-=", out);    break;
 170         case EXPR_BINARY_MUL_ASSIGN:         fputs("*=", out);    break;
 171         case EXPR_BINARY_MOD_ASSIGN:         fputs("%=", out);    break;
 172         case EXPR_BINARY_DIV_ASSIGN:         fputs("/=", out);    break;
 173         case EXPR_BINARY_BITWISE_OR_ASSIGN:  fputs("|=", out);    break;
 174         case EXPR_BINARY_BITWISE_AND_ASSIGN: fputs("&=", out);    break;
 175         case EXPR_BINARY_BITWISE_XOR_ASSIGN: fputs("^=", out);    break;
 176         case EXPR_BINARY_SHIFTLEFT_ASSIGN:   fputs("<<=", out);   break;
 177         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:  fputs(">>=", out);   break;
 178         default: panic("invalid binexpression found");
 179         }
 180         fprintf(out, " ");
 181         print_expression(binexpr->right);
 182         fprintf(out, ")");
 183 }
 184
 185 static void print_unary_expression(const unary_expression_t *unexpr)
 186 {
 187         switch(unexpr->expression.type) {
 188         case EXPR_UNARY_NEGATE:           fputs("-", out);  break;
 189         case EXPR_UNARY_PLUS:             fputs("+", out);  break;
 190         case EXPR_UNARY_NOT:              fputs("!", out);  break;
 191         case EXPR_UNARY_BITWISE_NEGATE:   fputs("~", out);  break;
 192         case EXPR_UNARY_PREFIX_INCREMENT: fputs("++", out); break;
 193         case EXPR_UNARY_PREFIX_DECREMENT: fputs("--", out); break;
 194         case EXPR_UNARY_DEREFERENCE:      fputs("*", out);  break;
 195         case EXPR_UNARY_TAKE_ADDRESS:     fputs("&", out);  break;
 196
 197         case EXPR_UNARY_POSTFIX_INCREMENT:
 198                 fputs("(", out);
 199                 print_expression(unexpr->value);
 200                 fputs(")", out);
 201                 fputs("++", out);
 202                 return;
 203         case EXPR_UNARY_POSTFIX_DECREMENT:
 204                 fputs("(", out);
 205                 print_expression(unexpr->value);
 206                 fputs(")", out);
 207                 fputs("--", out);
 208                 return;
 209         case EXPR_UNARY_CAST:
 210                 fputs("(", out);
 211                 print_type(unexpr->expression.datatype);
 212                 fputs(")", out);
 213                 break;
 214         case EXPR_UNARY_CAST_IMPLICIT:
 215                 print_expression(unexpr->value);
 216                 return;
 217         default:
 218                 panic("invalid unary expression found");
 219         }
 220         fputs("(", out);
 221         print_expression(unexpr->value);
 222         fputs(")", out);
 223 }
 224
 225 static void print_reference_expression(const reference_expression_t *ref)
 226 {
 227         fprintf(out, "%s", ref->declaration->symbol->string);
 228 }
 229
 230 static void print_array_expression(const array_access_expression_t *expression)
 231 {
 232         if(!expression->flipped) {
 233                 fputs("(", out);
 234                 print_expression(expression->array_ref);
 235                 fputs(")[", out);
 236                 print_expression(expression->index);
 237                 fputs("]", out);
 238         } else {
 239                 fputs("(", out);
 240                 print_expression(expression->index);
 241                 fputs(")[", out);
 242                 print_expression(expression->array_ref);
 243                 fputs("]", out);
 244         }
 245 }
 246
 247 static void print_sizeof_expression(const sizeof_expression_t *expression)
 248 {
 249         fputs("sizeof", out);
 250         if(expression->size_expression != NULL) {
 251                 fputc('(', out);
 252                 print_expression(expression->size_expression);
 253                 fputc(')', out);
 254         } else {
 255                 fputc('(', out);
 256                 print_type(expression->type);
 257                 fputc(')', out);
 258         }
 259 }
 260
 261 static void print_builtin_symbol(const builtin_symbol_expression_t *expression)
 262 {
 263         fputs(expression->symbol->string, out);
 264 }
 265
 266 static void print_conditional(const conditional_expression_t *expression)
 267 {
 268         fputs("(", out);
 269         print_expression(expression->condition);
 270         fputs(" ? ", out);
 271         print_expression(expression->true_expression);
 272         fputs(" : ", out);
 273         print_expression(expression->false_expression);
 274         fputs(")", out);
 275 }
 276
 277 static void print_va_start(const va_start_expression_t *const expression)
 278 {
 279         fputs("__builtin_va_start(", out);
 280         print_expression(expression->ap);
 281         fputs(", ", out);
 282         fputs(expression->parameter->symbol->string, out);
 283         fputs(")", out);
 284 }
 285
 286 static void print_va_arg(const va_arg_expression_t *expression)
 287 {
 288         fputs("__builtin_va_arg(", out);
 289         print_expression(expression->ap);
 290         fputs(", ", out);
 291         print_type(expression->expression.datatype);
 292         fputs(")", out);
 293 }
 294
 295 static void print_select(const select_expression_t *expression)
 296 {
 297         print_expression(expression->compound);
 298         if(expression->compound->base.datatype == NULL ||
 299                         expression->compound->base.datatype->type == TYPE_POINTER) {
 300                 fputs("->", out);
 301         } else {
 302                 fputc('.', out);
 303         }
 304         fputs(expression->symbol->string, out);
 305 }
 306
 307 static void print_classify_type_expression(
 308         const classify_type_expression_t *const expr)
 309 {
 310         fputs("__builtin_classify_type(", out);
 311         print_expression(expr->type_expression);
 312         fputc(')', out);
 313 }
 314
 315 void print_expression(const expression_t *expression)
 316 {
 317         switch(expression->type) {
 318         case EXPR_UNKNOWN:
 319         case EXPR_INVALID:
 320                 fprintf(out, "*invalid expression*");
 321                 break;
 322         case EXPR_CONST:
 323                 print_const(&expression->conste);
 324                 break;
 325         case EXPR_FUNCTION:
 326         case EXPR_PRETTY_FUNCTION:
 327         case EXPR_STRING_LITERAL:
 328                 print_string_literal(&expression->string);
 329                 break;
 330         case EXPR_WIDE_STRING_LITERAL:
 331                 print_wide_string_literal(&expression->wide_string);
 332                 break;
 333         case EXPR_CALL:
 334                 print_call_expression(&expression->call);
 335                 break;
 336         EXPR_BINARY_CASES
 337                 print_binary_expression(&expression->binary);
 338                 break;
 339         case EXPR_REFERENCE:
 340                 print_reference_expression(&expression->reference);
 341                 break;
 342         case EXPR_ARRAY_ACCESS:
 343                 print_array_expression(&expression->array_access);
 344                 break;
 345         EXPR_UNARY_CASES
 346                 print_unary_expression(&expression->unary);
 347                 break;
 348         case EXPR_SIZEOF:
 349                 print_sizeof_expression(&expression->sizeofe);
 350                 break;
 351         case EXPR_BUILTIN_SYMBOL:
 352                 print_builtin_symbol(&expression->builtin_symbol);
 353                 break;
 354         case EXPR_CONDITIONAL:
 355                 print_conditional(&expression->conditional);
 356                 break;
 357         case EXPR_VA_START:
 358                 print_va_start(&expression->va_starte);
 359         case EXPR_VA_ARG:
 360                 print_va_arg(&expression->va_arge);
 361                 break;
 362         case EXPR_SELECT:
 363                 print_select(&expression->select);
 364                 break;
 365         case EXPR_CLASSIFY_TYPE:
 366                 print_classify_type_expression(&expression->classify_type);
 367                 break;
 368
 369         case EXPR_OFFSETOF:
 370         case EXPR_STATEMENT:
 371                 /* TODO */
 372                 fprintf(out, "some expression of type %d", (int) expression->type);
 373                 break;
 374         }
 375 }
 376
 377 static void print_compound_statement(const compound_statement_t *block)
 378 {
 379         fputs("{\n", out);
 380         indent++;
 381
 382         statement_t *statement = block->statements;
 383         while(statement != NULL) {
 384                 print_indent();
 385                 print_statement(statement);
 386
 387                 statement = statement->base.next;
 388         }
 389         indent--;
 390         print_indent();
 391         fputs("}\n", out);
 392 }
 393
 394 static void print_return_statement(const return_statement_t *statement)
 395 {
 396         fprintf(out, "return ");
 397         if(statement->return_value != NULL)
 398                 print_expression(statement->return_value);
 399         fputs(";\n", out);
 400 }
 401
 402 static void print_expression_statement(const expression_statement_t *statement)
 403 {
 404         print_expression(statement->expression);
 405         fputs(";\n", out);
 406 }
 407
 408 static void print_goto_statement(const goto_statement_t *statement)
 409 {
 410         fprintf(out, "goto ");
 411         fputs(statement->label->symbol->string, out);
 412         fprintf(stderr, "(%p)", (void*) statement->label);
 413         fputs(";\n", out);
 414 }
 415
 416 static void print_label_statement(const label_statement_t *statement)
 417 {
 418         fprintf(stderr, "(%p)", (void*) statement->label);
 419         fprintf(out, "%s:\n", statement->label->symbol->string);
 420         if(statement->label_statement != NULL) {
 421                 print_statement(statement->label_statement);
 422         }
 423 }
 424
 425 static void print_if_statement(const if_statement_t *statement)
 426 {
 427         fputs("if(", out);
 428         print_expression(statement->condition);
 429         fputs(") ", out);
 430         if(statement->true_statement != NULL) {
 431                 print_statement(statement->true_statement);
 432         }
 433
 434         if(statement->false_statement != NULL) {
 435                 print_indent();
 436                 fputs("else ", out);
 437                 print_statement(statement->false_statement);
 438         }
 439 }
 440
 441 static void print_switch_statement(const switch_statement_t *statement)
 442 {
 443         fputs("switch(", out);
 444         print_expression(statement->expression);
 445         fputs(") ", out);
 446         print_statement(statement->body);
 447 }
 448
 449 static void print_case_label(const case_label_statement_t *statement)
 450 {
 451         if(statement->expression == NULL) {
 452                 fputs("default:\n", out);
 453         } else {
 454                 fputs("case ", out);
 455                 print_expression(statement->expression);
 456                 fputs(":\n", out);
 457         }
 458         print_statement(statement->label_statement);
 459 }
 460
 461 static void print_declaration_statement(
 462                 const declaration_statement_t *statement)
 463 {
 464         int first = 1;
 465         declaration_t *declaration = statement->declarations_begin;
 466         for( ; declaration != statement->declarations_end->next;
 467                declaration = declaration->next) {
 468                 if(!first) {
 469                         print_indent();
 470                 } else {
 471                         first = 0;
 472                 }
 473                 print_declaration(declaration);
 474                 fputc('\n', out);
 475         }
 476 }
 477
 478 static void print_while_statement(const while_statement_t *statement)
 479 {
 480         fputs("while(", out);
 481         print_expression(statement->condition);
 482         fputs(") ", out);
 483         print_statement(statement->body);
 484 }
 485
 486 static void print_do_while_statement(const do_while_statement_t *statement)
 487 {
 488         fputs("do ", out);
 489         print_statement(statement->body);
 490         print_indent();
 491         fputs("while(", out);
 492         print_expression(statement->condition);
 493         fputs(");\n", out);
 494 }
 495
 496 static void print_for_statement(const for_statement_t *statement)
 497 {
 498         fputs("for(", out);
 499         if(statement->context.declarations != NULL) {
 500                 assert(statement->initialisation == NULL);
 501                 print_declaration(statement->context.declarations);
 502                 if(statement->context.declarations->next != NULL) {
 503                         panic("multiple declarations in for statement not supported yet");
 504                 }
 505                 fputc(' ', out);
 506         } else {
 507                 if(statement->initialisation) {
 508                         print_expression(statement->initialisation);
 509                 }
 510                 fputs("; ", out);
 511         }
 512         if(statement->condition != NULL) {
 513                 print_expression(statement->condition);
 514         }
 515         fputs("; ", out);
 516         if(statement->step != NULL) {
 517                 print_expression(statement->step);
 518         }
 519         fputs(")", out);
 520         print_statement(statement->body);
 521 }
 522
 523 static void print_asm_constraints(asm_constraint_t *constraints)
 524 {
 525         asm_constraint_t *constraint = constraints;
 526         for( ; constraint != NULL; constraint = constraint->next) {
 527                 if(constraint != constraints)
 528                         fputs(", ", out);
 529
 530                 if(constraint->symbol) {
 531                         fprintf(out, "[%s] ", constraint->symbol->string);
 532                 }
 533                 print_quoted_string(constraint->constraints);
 534                 fputs(" (", out);
 535                 print_expression(constraint->expression);
 536                 fputs(")", out);
 537         }
 538 }
 539
 540 static void print_asm_clobbers(asm_clobber_t *clobbers)
 541 {
 542         asm_clobber_t *clobber = clobbers;
 543         for( ; clobber != NULL; clobber = clobber->next) {
 544                 if(clobber != clobbers)
 545                         fputs(", ", out);
 546
 547                 print_quoted_string(clobber->clobber);
 548         }
 549 }
 550
 551 static void print_asm_statement(const asm_statement_t *statement)
 552 {
 553         fputs("asm ", out);
 554         if(statement->is_volatile) {
 555                 fputs("volatile ", out);
 556         }
 557         fputs("(", out);
 558         print_quoted_string(statement->asm_text);
 559         if(statement->inputs == NULL && statement->outputs == NULL
 560                         && statement->clobbers == NULL)
 561                 goto end_of_print_asm_statement;
 562
 563         fputs(" : ", out);
 564         print_asm_constraints(statement->inputs);
 565         if(statement->outputs == NULL && statement->clobbers == NULL)
 566                 goto end_of_print_asm_statement;
 567
 568         fputs(" : ", out);
 569         print_asm_constraints(statement->outputs);
 570         if(statement->clobbers == NULL)
 571                 goto end_of_print_asm_statement;
 572
 573         fputs(" : ", out);
 574         print_asm_clobbers(statement->clobbers);
 575
 576 end_of_print_asm_statement:
 577         fputs(");\n", out);
 578 }
 579
 580 void print_statement(const statement_t *statement)
 581 {
 582         switch(statement->type) {
 583         case STATEMENT_COMPOUND:
 584                 print_compound_statement(&statement->compound);
 585                 break;
 586         case STATEMENT_RETURN:
 587                 print_return_statement(&statement->returns);
 588                 break;
 589         case STATEMENT_EXPRESSION:
 590                 print_expression_statement(&statement->expression);
 591                 break;
 592         case STATEMENT_LABEL:
 593                 print_label_statement(&statement->label);
 594                 break;
 595         case STATEMENT_GOTO:
 596                 print_goto_statement(&statement->gotos);
 597                 break;
 598         case STATEMENT_CONTINUE:
 599                 fputs("continue;\n", out);
 600                 break;
 601         case STATEMENT_BREAK:
 602                 fputs("break;\n", out);
 603                 break;
 604         case STATEMENT_IF:
 605                 print_if_statement(&statement->ifs);
 606                 break;
 607         case STATEMENT_SWITCH:
 608                 print_switch_statement(&statement->switchs);
 609                 break;
 610         case STATEMENT_CASE_LABEL:
 611                 print_case_label(&statement->case_label);
 612                 break;
 613         case STATEMENT_DECLARATION:
 614                 print_declaration_statement(&statement->declaration);
 615                 break;
 616         case STATEMENT_WHILE:
 617                 print_while_statement(&statement->whiles);
 618                 break;
 619         case STATEMENT_DO_WHILE:
 620                 print_do_while_statement(&statement->do_while);
 621                 break;
 622         case STATEMENT_FOR:
 623                 print_for_statement(&statement->fors);
 624                 break;
 625         case STATEMENT_ASM:
 626                 print_asm_statement(&statement->asms);
 627                 break;
 628         case STATEMENT_INVALID:
 629                 fprintf(out, "*invalid statement*");
 630                 break;
 631         }
 632 }
 633
 634 static void print_storage_class(unsigned storage_class)
 635 {
 636         switch((storage_class_tag_t) storage_class) {
 637         case STORAGE_CLASS_ENUM_ENTRY:
 638         case STORAGE_CLASS_NONE:
 639                 break;
 640         case STORAGE_CLASS_TYPEDEF:       fputs("typedef ",        out); break;
 641         case STORAGE_CLASS_EXTERN:        fputs("extern ",         out); break;
 642         case STORAGE_CLASS_STATIC:        fputs("static ",         out); break;
 643         case STORAGE_CLASS_AUTO:          fputs("auto ",           out); break;
 644         case STORAGE_CLASS_REGISTER:      fputs("register ",       out); break;
 645         case STORAGE_CLASS_THREAD:        fputs("__thread",        out); break;
 646         case STORAGE_CLASS_THREAD_EXTERN: fputs("extern __thread", out); break;
 647         case STORAGE_CLASS_THREAD_STATIC: fputs("static __thread", out); break;
 648         }
 649 }
 650
 651 void print_initializer(const initializer_t *initializer)
 652 {
 653         if(initializer->type == INITIALIZER_VALUE) {
 654                 const initializer_value_t *value = &initializer->value;
 655                 print_expression(value->value);
 656                 return;
 657         }
 658
 659         assert(initializer->type == INITIALIZER_LIST);
 660         fputs("{ ", out);
 661         const initializer_list_t *list = &initializer->list;
 662
 663         for(size_t i = 0 ; i < list->len; ++i) {
 664                 if(i > 0) {
 665                         fputs(", ", out);
 666                 }
 667                 print_initializer(list->initializers[i]);
 668         }
 669         fputs("}", out);
 670 }
 671
 672 static void print_normal_declaration(const declaration_t *declaration)
 673 {
 674         print_storage_class(declaration->storage_class);
 675         if(declaration->is_inline) {
 676                 if (declaration->decl_modifiers & DM_FORCEINLINE)
 677                         fputs("__forceinline ", out);
 678                 else
 679                         fputs("inline ", out);
 680         }
 681         print_type_ext(declaration->type, declaration->symbol,
 682                        &declaration->context);
 683
 684         if(declaration->type->type == TYPE_FUNCTION) {
 685                 if(declaration->init.statement != NULL) {
 686                         fputs("\n", out);
 687                         print_statement(declaration->init.statement);
 688                         return;
 689                 }
 690         } else if(declaration->init.initializer != NULL) {
 691                 fputs(" = ", out);
 692                 print_initializer(declaration->init.initializer);
 693         }
 694         fputc(';', out);
 695 }
 696
 697 void print_declaration(const declaration_t *declaration)
 698 {
 699         if(declaration->namespc != NAMESPACE_NORMAL &&
 700                         declaration->symbol == NULL)
 701                 return;
 702
 703         switch(declaration->namespc) {
 704         case NAMESPACE_NORMAL:
 705                 print_normal_declaration(declaration);
 706                 break;
 707         case NAMESPACE_STRUCT:
 708                 fputs("struct ", out);
 709                 fputs(declaration->symbol->string, out);
 710                 fputc(' ', out);
 711                 print_compound_definition(declaration);
 712                 fputc(';', out);
 713                 break;
 714         case NAMESPACE_UNION:
 715                 fputs("union ", out);
 716                 fputs(declaration->symbol->string, out);
 717                 fputc(' ', out);
 718                 print_compound_definition(declaration);
 719                 fputc(';', out);
 720                 break;
 721         case NAMESPACE_ENUM:
 722                 fputs("enum ", out);
 723                 fputs(declaration->symbol->string, out);
 724                 fputc(' ', out);
 725                 print_enum_definition(declaration);
 726                 fputc(';', out);
 727                 break;
 728         }
 729 }
 730
 731 void print_ast(const translation_unit_t *unit)
 732 {
 733         inc_type_visited();
 734
 735         declaration_t *declaration = unit->context.declarations;
 736         for( ; declaration != NULL; declaration = declaration->next) {
 737                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY)
 738                         continue;
 739                 if(declaration->namespc != NAMESPACE_NORMAL &&
 740                                 declaration->symbol == NULL)
 741                         continue;
 742
 743                 print_indent();
 744                 print_declaration(declaration);
 745                 fputc('\n', out);
 746         }
 747 }
 748
 749 bool is_constant_expression(const expression_t *expression)
 750 {
 751         switch(expression->type) {
 752
 753         case EXPR_CONST:
 754         case EXPR_STRING_LITERAL:
 755         case EXPR_WIDE_STRING_LITERAL:
 756         case EXPR_SIZEOF:
 757         case EXPR_CLASSIFY_TYPE:
 758         case EXPR_FUNCTION:
 759         case EXPR_PRETTY_FUNCTION:
 760         case EXPR_OFFSETOF:
 761                 return true;
 762
 763         case EXPR_BUILTIN_SYMBOL:
 764         case EXPR_CALL:
 765         case EXPR_REFERENCE:
 766         case EXPR_SELECT:
 767         case EXPR_VA_START:
 768         case EXPR_VA_ARG:
 769         case EXPR_STATEMENT:
 770         case EXPR_UNARY_POSTFIX_INCREMENT:
 771         case EXPR_UNARY_POSTFIX_DECREMENT:
 772         case EXPR_UNARY_PREFIX_INCREMENT:
 773         case EXPR_UNARY_PREFIX_DECREMENT:
 774         case EXPR_BINARY_ASSIGN:
 775         case EXPR_BINARY_MUL_ASSIGN:
 776         case EXPR_BINARY_DIV_ASSIGN:
 777         case EXPR_BINARY_MOD_ASSIGN:
 778         case EXPR_BINARY_ADD_ASSIGN:
 779         case EXPR_BINARY_SUB_ASSIGN:
 780         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
 781         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
 782         case EXPR_BINARY_BITWISE_AND_ASSIGN:
 783         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
 784         case EXPR_BINARY_BITWISE_OR_ASSIGN:
 785         case EXPR_BINARY_COMMA:
 786                 return false;
 787
 788         case EXPR_UNARY_NEGATE:
 789         case EXPR_UNARY_PLUS:
 790         case EXPR_UNARY_BITWISE_NEGATE:
 791         case EXPR_UNARY_NOT:
 792         case EXPR_UNARY_DEREFERENCE:
 793         case EXPR_UNARY_TAKE_ADDRESS:
 794         case EXPR_UNARY_CAST:
 795         case EXPR_UNARY_CAST_IMPLICIT:
 796                 return is_constant_expression(expression->unary.value);
 797
 798         case EXPR_BINARY_ADD:
 799         case EXPR_BINARY_SUB:
 800         case EXPR_BINARY_MUL:
 801         case EXPR_BINARY_DIV:
 802         case EXPR_BINARY_MOD:
 803         case EXPR_BINARY_EQUAL:
 804         case EXPR_BINARY_NOTEQUAL:
 805         case EXPR_BINARY_LESS:
 806         case EXPR_BINARY_LESSEQUAL:
 807         case EXPR_BINARY_GREATER:
 808         case EXPR_BINARY_GREATEREQUAL:
 809         case EXPR_BINARY_BITWISE_AND:
 810         case EXPR_BINARY_BITWISE_OR:
 811         case EXPR_BINARY_BITWISE_XOR:
 812         case EXPR_BINARY_LOGICAL_AND:
 813         case EXPR_BINARY_LOGICAL_OR:
 814         case EXPR_BINARY_SHIFTLEFT:
 815         case EXPR_BINARY_SHIFTRIGHT:
 816         case EXPR_BINARY_ISGREATER:
 817         case EXPR_BINARY_ISGREATEREQUAL:
 818         case EXPR_BINARY_ISLESS:
 819         case EXPR_BINARY_ISLESSEQUAL:
 820         case EXPR_BINARY_ISLESSGREATER:
 821         case EXPR_BINARY_ISUNORDERED:
 822                 return is_constant_expression(expression->binary.left)
 823                         && is_constant_expression(expression->binary.right);
 824
 825         case EXPR_CONDITIONAL:
 826                 /* TODO: not correct, we only have to test expressions which are
 827                  * evaluated, which means either the true or false part might be not
 828                  * constant */
 829                 return is_constant_expression(expression->conditional.condition)
 830                         && is_constant_expression(expression->conditional.true_expression)
 831                         && is_constant_expression(expression->conditional.false_expression);
 832
 833         case EXPR_ARRAY_ACCESS:
 834                 return is_constant_expression(expression->array_access.array_ref)
 835                         && is_constant_expression(expression->array_access.index);
 836
 837         case EXPR_UNKNOWN:
 838         case EXPR_INVALID:
 839                 break;
 840         }
 841         panic("invalid expression found (is constant expression)");
 842 }
 843
 844
 845 void init_ast(void)
 846 {
 847         obstack_init(&ast_obstack);
 848 }
 849
 850 void exit_ast(void)
 851 {
 852         obstack_free(&ast_obstack, NULL);
 853 }
 854
 855 void ast_set_output(FILE *stream)
 856 {
 857         out = stream;
 858         type_set_output(stream);
 859 }
 860
 861 void* (allocate_ast) (size_t size)
 862 {
 863         return _allocate_ast(size);
 864 }