nsz Git - cparser/blob - type.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <stdio.h>
  23 #include <assert.h>
  24
  25 #include "type_t.h"
  26 #include "symbol_t.h"
  27 #include "type_hash.h"
  28 #include "adt/error.h"
  29 #include "lang_features.h"
  30
  31 static struct obstack   _type_obst;
  32 static FILE            *out;
  33 struct obstack         *type_obst                 = &_type_obst;
  34 static int              type_visited              = 0;
  35 static bool             print_implicit_array_size = false;
  36
  37 static void intern_print_type_pre(const type_t *type, bool top);
  38 static void intern_print_type_post(const type_t *type, bool top);
  39
  40 typedef struct atomic_type_properties_t atomic_type_properties_t;
  41 struct atomic_type_properties_t {
  42         unsigned   size;              /**< type size in bytes */
  43         unsigned   alignment;         /**< type alignment in bytes */
  44         unsigned   flags;             /**< type flags from atomic_type_flag_t */
  45 };
  46
  47 static atomic_type_properties_t atomic_type_properties[ATOMIC_TYPE_LAST+1] = {
  48         //ATOMIC_TYPE_INVALID = 0,
  49         [ATOMIC_TYPE_VOID] = {
  50                 .size       = 0,
  51                 .alignment  = 0,
  52                 .flags      = ATOMIC_TYPE_FLAG_NONE
  53         },
  54         [ATOMIC_TYPE_CHAR] = {
  55                 .size       = 1,
  56                 .alignment  = 1,
  57                 /* signed flag will be set when known */
  58                 .flags      = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
  59         },
  60         [ATOMIC_TYPE_SCHAR] = {
  61                 .size       = 1,
  62                 .alignment  = 1,
  63                 .flags      = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
  64                               | ATOMIC_TYPE_FLAG_SIGNED,
  65         },
  66         [ATOMIC_TYPE_UCHAR] = {
  67                 .size       = 1,
  68                 .alignment  = 1,
  69                 .flags      = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
  70         },
  71         [ATOMIC_TYPE_SHORT] = {
  72                 .size       = 2,
  73                 .alignment  = 2,
  74                 .flags      = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
  75                               | ATOMIC_TYPE_FLAG_SIGNED
  76         },
  77         [ATOMIC_TYPE_USHORT] = {
  78                 .size       = 2,
  79                 .alignment  = 2,
  80                 .flags      = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
  81         },
  82         [ATOMIC_TYPE_INT] = {
  83                 .size       = (unsigned) -1,
  84                 .alignment  = (unsigned) -1,
  85                 .flags      = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
  86                               | ATOMIC_TYPE_FLAG_SIGNED,
  87         },
  88         [ATOMIC_TYPE_UINT] = {
  89                 .size       = (unsigned) -1,
  90                 .alignment  = (unsigned) -1,
  91                 .flags      = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
  92         },
  93         [ATOMIC_TYPE_LONG] = {
  94                 .size       = (unsigned) -1,
  95                 .alignment  = (unsigned) -1,
  96                 .flags      = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
  97                               | ATOMIC_TYPE_FLAG_SIGNED,
  98         },
  99         [ATOMIC_TYPE_ULONG] = {
 100                 .size       = (unsigned) -1,
 101                 .alignment  = (unsigned) -1,
 102                 .flags      = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
 103         },
 104         [ATOMIC_TYPE_LONGLONG] = {
 105                 .size       = (unsigned) -1,
 106                 .alignment  = (unsigned) -1,
 107                 .flags      = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC
 108                               | ATOMIC_TYPE_FLAG_SIGNED,
 109         },
 110         [ATOMIC_TYPE_ULONGLONG] = {
 111                 .size       = (unsigned) -1,
 112                 .alignment  = (unsigned) -1,
 113                 .flags      = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
 114         },
 115         [ATOMIC_TYPE_BOOL] = {
 116                 .size       = (unsigned) -1,
 117                 .alignment  = (unsigned) -1,
 118                 .flags      = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
 119         },
 120         [ATOMIC_TYPE_FLOAT] = {
 121                 .size       = 4,
 122                 .alignment  = (unsigned) -1,
 123                 .flags      = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
 124                               | ATOMIC_TYPE_FLAG_SIGNED,
 125         },
 126         [ATOMIC_TYPE_DOUBLE] = {
 127                 .size       = 8,
 128                 .alignment  = (unsigned) -1,
 129                 .flags      = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
 130                               | ATOMIC_TYPE_FLAG_SIGNED,
 131         },
 132         [ATOMIC_TYPE_LONG_DOUBLE] = {
 133                 .size       = 12,
 134                 .alignment  = (unsigned) -1,
 135                 .flags      = ATOMIC_TYPE_FLAG_FLOAT | ATOMIC_TYPE_FLAG_ARITHMETIC
 136                               | ATOMIC_TYPE_FLAG_SIGNED,
 137         },
 138         /* complex and imaginary types are set in init_types */
 139 };
 140
 141 void init_types(void)
 142 {
 143         obstack_init(type_obst);
 144
 145         atomic_type_properties_t *props = atomic_type_properties;
 146
 147         if (char_is_signed) {
 148                 props[ATOMIC_TYPE_CHAR].flags |= ATOMIC_TYPE_FLAG_SIGNED;
 149         }
 150
 151         unsigned int_size   = machine_size < 32 ? 2 : 4;
 152         unsigned long_size  = machine_size < 64 ? 4 : 8;
 153         unsigned llong_size = machine_size < 32 ? 4 : 8;
 154
 155         props[ATOMIC_TYPE_INT].size            = int_size;
 156         props[ATOMIC_TYPE_INT].alignment       = int_size;
 157         props[ATOMIC_TYPE_UINT].size           = int_size;
 158         props[ATOMIC_TYPE_UINT].alignment      = int_size;
 159         props[ATOMIC_TYPE_LONG].size           = long_size;
 160         props[ATOMIC_TYPE_LONG].alignment      = long_size;
 161         props[ATOMIC_TYPE_ULONG].size          = long_size;
 162         props[ATOMIC_TYPE_ULONG].alignment     = long_size;
 163         props[ATOMIC_TYPE_LONGLONG].size       = llong_size;
 164         props[ATOMIC_TYPE_LONGLONG].alignment  = llong_size;
 165         props[ATOMIC_TYPE_ULONGLONG].size      = llong_size;
 166         props[ATOMIC_TYPE_ULONGLONG].alignment = llong_size;
 167
 168         /* TODO: backend specific, need a way to query the backend for this.
 169          * The following are good settings for x86 */
 170         props[ATOMIC_TYPE_FLOAT].alignment       = 4;
 171         props[ATOMIC_TYPE_DOUBLE].alignment      = 4;
 172         props[ATOMIC_TYPE_LONG_DOUBLE].alignment = 4;
 173         props[ATOMIC_TYPE_LONGLONG].alignment    = 4;
 174         props[ATOMIC_TYPE_ULONGLONG].alignment   = 4;
 175
 176         /* TODO: make this configurable for platforms which do not use byte sized
 177          * bools. */
 178         props[ATOMIC_TYPE_BOOL] = props[ATOMIC_TYPE_UCHAR];
 179 }
 180
 181 void exit_types(void)
 182 {
 183         obstack_free(type_obst, NULL);
 184 }
 185
 186 void type_set_output(FILE *stream)
 187 {
 188         out = stream;
 189 }
 190
 191 void inc_type_visited(void)
 192 {
 193         type_visited++;
 194 }
 195
 196 void print_type_qualifiers(type_qualifiers_t qualifiers)
 197 {
 198         int first = 1;
 199         if (qualifiers & TYPE_QUALIFIER_CONST) {
 200                 fputs(" const" + first,    out);
 201                 first = 0;
 202         }
 203         if (qualifiers & TYPE_QUALIFIER_VOLATILE) {
 204                 fputs(" volatile" + first, out);
 205                 first = 0;
 206         }
 207         if (qualifiers & TYPE_QUALIFIER_RESTRICT) {
 208                 fputs(" restrict" + first, out);
 209                 first = 0;
 210         }
 211 }
 212
 213 /**
 214  * Prints the name of an atomic type kinds.
 215  *
 216  * @param kind  The type kind.
 217  */
 218 static
 219 void print_atomic_kinds(atomic_type_kind_t kind)
 220 {
 221         const char *s = "INVALIDATOMIC";
 222         switch(kind) {
 223         case ATOMIC_TYPE_INVALID:                               break;
 224         case ATOMIC_TYPE_VOID:        s = "void";               break;
 225         case ATOMIC_TYPE_BOOL:        s = "_Bool";              break;
 226         case ATOMIC_TYPE_CHAR:        s = "char";               break;
 227         case ATOMIC_TYPE_SCHAR:       s = "signed char";        break;
 228         case ATOMIC_TYPE_UCHAR:       s = "unsigned char";      break;
 229         case ATOMIC_TYPE_INT:         s = "int";                break;
 230         case ATOMIC_TYPE_UINT:        s = "unsigned int";       break;
 231         case ATOMIC_TYPE_SHORT:       s = "short";              break;
 232         case ATOMIC_TYPE_USHORT:      s = "unsigned short";     break;
 233         case ATOMIC_TYPE_LONG:        s = "long";               break;
 234         case ATOMIC_TYPE_ULONG:       s = "unsigned long";      break;
 235         case ATOMIC_TYPE_LONGLONG:    s = "long long";          break;
 236         case ATOMIC_TYPE_ULONGLONG:   s = "unsigned long long"; break;
 237         case ATOMIC_TYPE_LONG_DOUBLE: s = "long double";        break;
 238         case ATOMIC_TYPE_FLOAT:       s = "float";              break;
 239         case ATOMIC_TYPE_DOUBLE:      s = "double";             break;
 240         }
 241         fputs(s, out);
 242 }
 243
 244 /**
 245  * Prints the name of an atomic type.
 246  *
 247  * @param type  The type.
 248  */
 249 static
 250 void print_atomic_type(const atomic_type_t *type)
 251 {
 252         print_type_qualifiers(type->base.qualifiers);
 253         if (type->base.qualifiers != 0)
 254                 fputc(' ', out);
 255         print_atomic_kinds(type->akind);
 256 }
 257
 258 /**
 259  * Prints the name of a complex type.
 260  *
 261  * @param type  The type.
 262  */
 263 static
 264 void print_complex_type(const complex_type_t *type)
 265 {
 266         int empty = type->base.qualifiers == 0;
 267         print_type_qualifiers(type->base.qualifiers);
 268         fputs(" _Complex " + empty, out);
 269         print_atomic_kinds(type->akind);
 270 }
 271
 272 /**
 273  * Prints the name of an imaginary type.
 274  *
 275  * @param type  The type.
 276  */
 277 static
 278 void print_imaginary_type(const imaginary_type_t *type)
 279 {
 280         int empty = type->base.qualifiers == 0;
 281         print_type_qualifiers(type->base.qualifiers);
 282         fputs(" _Imaginary " + empty, out);
 283         print_atomic_kinds(type->akind);
 284 }
 285
 286 /**
 287  * Print the first part (the prefix) of a type.
 288  *
 289  * @param type   The type to print.
 290  * @param top    true, if this is the top type, false if it's an embedded type.
 291  */
 292 static void print_function_type_pre(const function_type_t *type, bool top)
 293 {
 294         print_type_qualifiers(type->base.qualifiers);
 295         if (type->base.qualifiers != 0)
 296                 fputc(' ', out);
 297
 298
 299         intern_print_type_pre(type->return_type, false);
 300
 301         switch (type->calling_convention) {
 302         case CC_CDECL:
 303                 fputs("__cdecl ", out);
 304                 break;
 305         case CC_STDCALL:
 306                 fputs("__stdcall ", out);
 307                 break;
 308         case CC_FASTCALL:
 309                 fputs("__fastcall ", out);
 310                 break;
 311         case CC_THISCALL:
 312                 fputs("__thiscall ", out);
 313                 break;
 314         case CC_DEFAULT:
 315                 break;
 316         }
 317
 318         /* don't emit parenthesis if we're the toplevel type... */
 319         if (!top)
 320                 fputc('(', out);
 321 }
 322
 323 /**
 324  * Print the second part (the postfix) of a type.
 325  *
 326  * @param type   The type to print.
 327  * @param top    true, if this is the top type, false if it's an embedded type.
 328  */
 329 static void print_function_type_post(const function_type_t *type,
 330                                      const scope_t *scope, bool top)
 331 {
 332         /* don't emit parenthesis if we're the toplevel type... */
 333         if (!top)
 334                 fputc(')', out);
 335
 336         fputc('(', out);
 337         bool first = true;
 338         if (scope == NULL) {
 339                 function_parameter_t *parameter = type->parameters;
 340                 for( ; parameter != NULL; parameter = parameter->next) {
 341                         if (first) {
 342                                 first = false;
 343                         } else {
 344                                 fputs(", ", out);
 345                         }
 346                         print_type(parameter->type);
 347                 }
 348         } else {
 349                 declaration_t *parameter = scope->declarations;
 350                 for( ; parameter != NULL; parameter = parameter->next) {
 351                         if (first) {
 352                                 first = false;
 353                         } else {
 354                                 fputs(", ", out);
 355                         }
 356                         print_type_ext(parameter->type, parameter->symbol,
 357                                        &parameter->scope);
 358                 }
 359         }
 360         if (type->variadic) {
 361                 if (first) {
 362                         first = false;
 363                 } else {
 364                         fputs(", ", out);
 365                 }
 366                 fputs("...", out);
 367         }
 368         if (first && !type->unspecified_parameters) {
 369                 fputs("void", out);
 370         }
 371         fputc(')', out);
 372
 373         intern_print_type_post(type->return_type, false);
 374 }
 375
 376 /**
 377  * Prints the prefix part of a pointer type.
 378  *
 379  * @param type   The pointer type.
 380  */
 381 static void print_pointer_type_pre(const pointer_type_t *type)
 382 {
 383         intern_print_type_pre(type->points_to, false);
 384         fputs("*", out);
 385         print_type_qualifiers(type->base.qualifiers);
 386         if (type->base.qualifiers != 0)
 387                 fputc(' ', out);
 388 }
 389
 390 /**
 391  * Prints the postfix part of a pointer type.
 392  *
 393  * @param type   The pointer type.
 394  */
 395 static void print_pointer_type_post(const pointer_type_t *type)
 396 {
 397         intern_print_type_post(type->points_to, false);
 398 }
 399
 400 /**
 401  * Prints the prefix part of an array type.
 402  *
 403  * @param type   The array type.
 404  */
 405 static void print_array_type_pre(const array_type_t *type)
 406 {
 407         intern_print_type_pre(type->element_type, false);
 408 }
 409
 410 /**
 411  * Prints the postfix part of an array type.
 412  *
 413  * @param type   The array type.
 414  */
 415 static void print_array_type_post(const array_type_t *type)
 416 {
 417         fputc('[', out);
 418         if (type->is_static) {
 419                 fputs("static ", out);
 420         }
 421         print_type_qualifiers(type->base.qualifiers);
 422         if (type->base.qualifiers != 0)
 423                 fputc(' ', out);
 424         if (type->size_expression != NULL
 425                         && (print_implicit_array_size || !type->has_implicit_size)) {
 426                 print_expression(type->size_expression);
 427         }
 428         fputc(']', out);
 429         intern_print_type_post(type->element_type, false);
 430 }
 431
 432 /**
 433  * Prints the postfix part of a bitfield type.
 434  *
 435  * @param type   The array type.
 436  */
 437 static void print_bitfield_type_post(const bitfield_type_t *type)
 438 {
 439         fputs(" : ", out);
 440         print_expression(type->size_expression);
 441         intern_print_type_post(type->base_type, false);
 442 }
 443
 444 /**
 445  * Prints an enum definition.
 446  *
 447  * @param declaration  The enum's type declaration.
 448  */
 449 void print_enum_definition(const declaration_t *declaration)
 450 {
 451         fputs("{\n", out);
 452
 453         change_indent(1);
 454
 455         declaration_t *entry = declaration->next;
 456         for( ; entry != NULL && entry->storage_class == STORAGE_CLASS_ENUM_ENTRY;
 457                entry = entry->next) {
 458
 459                 print_indent();
 460                 fprintf(out, "%s", entry->symbol->string);
 461                 if (entry->init.initializer != NULL) {
 462                         fprintf(out, " = ");
 463
 464                         /* skip the implicit cast */
 465                         expression_t *expression = entry->init.enum_value;
 466                         if (expression->kind == EXPR_UNARY_CAST_IMPLICIT) {
 467                                 expression = expression->unary.value;
 468                         }
 469                         print_expression(expression);
 470                 }
 471                 fprintf(out, ",\n");
 472         }
 473
 474         change_indent(-1);
 475         print_indent();
 476         fputs("}", out);
 477 }
 478
 479 /**
 480  * Prints an enum type.
 481  *
 482  * @param type  The enum type.
 483  */
 484 static void print_type_enum(const enum_type_t *type)
 485 {
 486         int empty = type->base.qualifiers == 0;
 487         print_type_qualifiers(type->base.qualifiers);
 488         fputs(" enum " + empty, out);
 489
 490         declaration_t *declaration = type->declaration;
 491         symbol_t      *symbol      = declaration->symbol;
 492         if (symbol != NULL) {
 493                 fputs(symbol->string, out);
 494         } else {
 495                 print_enum_definition(declaration);
 496         }
 497 }
 498
 499 /**
 500  * Print the compound part of a compound type.
 501  *
 502  * @param declaration  The declaration of the compound type.
 503  */
 504 void print_compound_definition(const declaration_t *declaration)
 505 {
 506         fputs("{\n", out);
 507         change_indent(1);
 508
 509         declaration_t *iter = declaration->scope.declarations;
 510         for( ; iter != NULL; iter = iter->next) {
 511                 print_indent();
 512                 print_declaration(iter);
 513                 fputc('\n', out);
 514         }
 515
 516         change_indent(-1);
 517         print_indent();
 518         fputs("}", out);
 519 }
 520
 521 /**
 522  * Prints a compound type.
 523  *
 524  * @param type  The compound type.
 525  */
 526 static void print_compound_type(const compound_type_t *type)
 527 {
 528         int empty = type->base.qualifiers == 0;
 529         print_type_qualifiers(type->base.qualifiers);
 530
 531         if (type->base.kind == TYPE_COMPOUND_STRUCT) {
 532                 fputs(" struct " + empty, out);
 533         } else {
 534                 assert(type->base.kind == TYPE_COMPOUND_UNION);
 535                 fputs(" union " + empty, out);
 536         }
 537
 538         declaration_t *declaration = type->declaration;
 539         symbol_t      *symbol      = declaration->symbol;
 540         if (symbol != NULL) {
 541                 fputs(symbol->string, out);
 542         } else {
 543                 print_compound_definition(declaration);
 544         }
 545 }
 546
 547 /**
 548  * Prints the prefix part of a typedef type.
 549  *
 550  * @param type   The typedef type.
 551  */
 552 static void print_typedef_type_pre(const typedef_type_t *const type)
 553 {
 554         print_type_qualifiers(type->base.qualifiers);
 555         if (type->base.qualifiers != 0)
 556                 fputc(' ', out);
 557         fputs(type->declaration->symbol->string, out);
 558 }
 559
 560 /**
 561  * Prints the prefix part of a typeof type.
 562  *
 563  * @param type   The typeof type.
 564  */
 565 static void print_typeof_type_pre(const typeof_type_t *const type)
 566 {
 567         fputs("typeof(", out);
 568         if (type->expression != NULL) {
 569                 assert(type->typeof_type == NULL);
 570                 print_expression(type->expression);
 571         } else {
 572                 print_type(type->typeof_type);
 573         }
 574         fputc(')', out);
 575 }
 576
 577 /**
 578  * Prints the prefix part of a type.
 579  *
 580  * @param type   The type.
 581  * @param top    true if we print the toplevel type, false else.
 582  */
 583 static void intern_print_type_pre(const type_t *const type, const bool top)
 584 {
 585         switch(type->kind) {
 586         case TYPE_ERROR:
 587                 fputs("<error>", out);
 588                 return;
 589         case TYPE_INVALID:
 590                 fputs("<invalid>", out);
 591                 return;
 592         case TYPE_ENUM:
 593                 print_type_enum(&type->enumt);
 594                 return;
 595         case TYPE_ATOMIC:
 596                 print_atomic_type(&type->atomic);
 597                 return;
 598         case TYPE_COMPLEX:
 599                 print_complex_type(&type->complex);
 600                 return;
 601         case TYPE_IMAGINARY:
 602                 print_imaginary_type(&type->imaginary);
 603                 return;
 604         case TYPE_COMPOUND_STRUCT:
 605         case TYPE_COMPOUND_UNION:
 606                 print_compound_type(&type->compound);
 607                 return;
 608         case TYPE_BUILTIN:
 609                 fputs(type->builtin.symbol->string, out);
 610                 return;
 611         case TYPE_FUNCTION:
 612                 print_function_type_pre(&type->function, top);
 613                 return;
 614         case TYPE_POINTER:
 615                 print_pointer_type_pre(&type->pointer);
 616                 return;
 617         case TYPE_BITFIELD:
 618                 intern_print_type_pre(type->bitfield.base_type, top);
 619                 return;
 620         case TYPE_ARRAY:
 621                 print_array_type_pre(&type->array);
 622                 return;
 623         case TYPE_TYPEDEF:
 624                 print_typedef_type_pre(&type->typedeft);
 625                 return;
 626         case TYPE_TYPEOF:
 627                 print_typeof_type_pre(&type->typeoft);
 628                 return;
 629         }
 630         fputs("unknown", out);
 631 }
 632
 633 /**
 634  * Prints the postfix part of a type.
 635  *
 636  * @param type   The type.
 637  * @param top    true if we print the toplevel type, false else.
 638  */
 639 static void intern_print_type_post(const type_t *const type, const bool top)
 640 {
 641         switch(type->kind) {
 642         case TYPE_FUNCTION:
 643                 print_function_type_post(&type->function, NULL, top);
 644                 return;
 645         case TYPE_POINTER:
 646                 print_pointer_type_post(&type->pointer);
 647                 return;
 648         case TYPE_ARRAY:
 649                 print_array_type_post(&type->array);
 650                 return;
 651         case TYPE_BITFIELD:
 652                 print_bitfield_type_post(&type->bitfield);
 653                 return;
 654         case TYPE_ERROR:
 655         case TYPE_INVALID:
 656         case TYPE_ATOMIC:
 657         case TYPE_COMPLEX:
 658         case TYPE_IMAGINARY:
 659         case TYPE_ENUM:
 660         case TYPE_COMPOUND_STRUCT:
 661         case TYPE_COMPOUND_UNION:
 662         case TYPE_BUILTIN:
 663         case TYPE_TYPEOF:
 664         case TYPE_TYPEDEF:
 665                 break;
 666         }
 667 }
 668
 669 /**
 670  * Prints a type.
 671  *
 672  * @param type   The type.
 673  */
 674 void print_type(const type_t *const type)
 675 {
 676         print_type_ext(type, NULL, NULL);
 677 }
 678
 679 void print_type_ext(const type_t *const type, const symbol_t *symbol,
 680                     const scope_t *scope)
 681 {
 682         if (type == NULL) {
 683                 fputs("nil type", out);
 684                 return;
 685         }
 686
 687         intern_print_type_pre(type, true);
 688         if (symbol != NULL) {
 689                 fputc(' ', out);
 690                 fputs(symbol->string, out);
 691         }
 692         if (type->kind == TYPE_FUNCTION) {
 693                 print_function_type_post(&type->function, scope, true);
 694         } else {
 695                 intern_print_type_post(type, true);
 696         }
 697 }
 698
 699 /**
 700  * Return the size of a type AST node.
 701  *
 702  * @param type  The type.
 703  */
 704 static size_t get_type_size(const type_t *type)
 705 {
 706         switch(type->kind) {
 707         case TYPE_ATOMIC:          return sizeof(atomic_type_t);
 708         case TYPE_COMPLEX:         return sizeof(complex_type_t);
 709         case TYPE_IMAGINARY:       return sizeof(imaginary_type_t);
 710         case TYPE_COMPOUND_STRUCT:
 711         case TYPE_COMPOUND_UNION:  return sizeof(compound_type_t);
 712         case TYPE_ENUM:            return sizeof(enum_type_t);
 713         case TYPE_FUNCTION:        return sizeof(function_type_t);
 714         case TYPE_POINTER:         return sizeof(pointer_type_t);
 715         case TYPE_ARRAY:           return sizeof(array_type_t);
 716         case TYPE_BUILTIN:         return sizeof(builtin_type_t);
 717         case TYPE_TYPEDEF:         return sizeof(typedef_type_t);
 718         case TYPE_TYPEOF:          return sizeof(typeof_type_t);
 719         case TYPE_BITFIELD:        return sizeof(bitfield_type_t);
 720         case TYPE_ERROR:           panic("error type found");
 721         case TYPE_INVALID:         panic("invalid type found");
 722         }
 723         panic("unknown type found");
 724 }
 725
 726 /**
 727  * Duplicates a type.
 728  *
 729  * @param type  The type to copy.
 730  * @return A copy of the type.
 731  *
 732  * @note This does not produce a deep copy!
 733  */
 734 type_t *duplicate_type(const type_t *type)
 735 {
 736         size_t size = get_type_size(type);
 737
 738         type_t *copy = obstack_alloc(type_obst, size);
 739         memcpy(copy, type, size);
 740
 741         return copy;
 742 }
 743
 744 /**
 745  * Returns the unqualified type of a given type.
 746  *
 747  * @param type  The type.
 748  * @returns The unqualified type.
 749  */
 750 type_t *get_unqualified_type(type_t *type)
 751 {
 752         assert(!is_typeref(type));
 753
 754         if (type->base.qualifiers == TYPE_QUALIFIER_NONE)
 755                 return type;
 756
 757         type_t *unqualified_type          = duplicate_type(type);
 758         unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
 759
 760         type_t *result = typehash_insert(unqualified_type);
 761         if (result != unqualified_type) {
 762                 obstack_free(type_obst, unqualified_type);
 763         }
 764
 765         return result;
 766 }
 767
 768 type_t *get_qualified_type(type_t *orig_type, type_qualifiers_t const qual)
 769 {
 770         type_t *type = skip_typeref(orig_type);
 771
 772         type_t *copy;
 773         if (is_type_array(type)) {
 774                 /* For array types the element type has to be adjusted */
 775                 type_t *element_type      = type->array.element_type;
 776                 type_t *qual_element_type = get_qualified_type(element_type, qual);
 777
 778                 if (qual_element_type == element_type)
 779                         return orig_type;
 780
 781                 copy                     = duplicate_type(type);
 782                 copy->array.element_type = qual_element_type;
 783         } else if (is_type_valid(type)) {
 784                 if ((type->base.qualifiers & qual) == qual)
 785                         return orig_type;
 786
 787                 copy                   = duplicate_type(type);
 788                 copy->base.qualifiers |= qual;
 789         } else {
 790                 return type;
 791         }
 792
 793         type = typehash_insert(copy);
 794         if (type != copy)
 795                 obstack_free(type_obst, copy);
 796
 797         return type;
 798 }
 799
 800 /**
 801  * Check if a type is valid.
 802  *
 803  * @param type  The type to check.
 804  * @return true if type represents a valid type.
 805  */
 806 bool type_valid(const type_t *type)
 807 {
 808         return type->kind != TYPE_INVALID;
 809 }
 810
 811 static bool test_atomic_type_flag(atomic_type_kind_t kind,
 812                                   atomic_type_flag_t flag)
 813 {
 814         assert(kind <= ATOMIC_TYPE_LAST);
 815         return (atomic_type_properties[kind].flags & flag) != 0;
 816 }
 817
 818 /**
 819  * Returns true if the given type is an integer type.
 820  *
 821  * @param type  The type to check.
 822  * @return True if type is an integer type.
 823  */
 824 bool is_type_integer(const type_t *type)
 825 {
 826         assert(!is_typeref(type));
 827
 828         if (type->kind == TYPE_ENUM)
 829                 return true;
 830         if (type->kind == TYPE_BITFIELD)
 831                 return true;
 832
 833         if (type->kind != TYPE_ATOMIC)
 834                 return false;
 835
 836         return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_INTEGER);
 837 }
 838
 839 /**
 840  * Returns true if the given type is an enum type.
 841  *
 842  * @param type  The type to check.
 843  * @return True if type is an enum type.
 844  */
 845 bool is_type_enum(const type_t *type)
 846 {
 847         assert(!is_typeref(type));
 848         return type->kind == TYPE_ENUM;
 849 }
 850
 851 /**
 852  * Returns true if the given type is an floating point type.
 853  *
 854  * @param type  The type to check.
 855  * @return True if type is a floating point type.
 856  */
 857 bool is_type_float(const type_t *type)
 858 {
 859         assert(!is_typeref(type));
 860
 861         if (type->kind != TYPE_ATOMIC)
 862                 return false;
 863
 864         return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_FLOAT);
 865 }
 866
 867 /**
 868  * Returns true if the given type is an complex type.
 869  *
 870  * @param type  The type to check.
 871  * @return True if type is a complex type.
 872  */
 873 bool is_type_complex(const type_t *type)
 874 {
 875         assert(!is_typeref(type));
 876
 877         if (type->kind != TYPE_ATOMIC)
 878                 return false;
 879
 880         return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_COMPLEX);
 881 }
 882
 883 /**
 884  * Returns true if the given type is a signed type.
 885  *
 886  * @param type  The type to check.
 887  * @return True if type is a signed type.
 888  */
 889 bool is_type_signed(const type_t *type)
 890 {
 891         assert(!is_typeref(type));
 892
 893         /* enum types are int for now */
 894         if (type->kind == TYPE_ENUM)
 895                 return true;
 896         if (type->kind == TYPE_BITFIELD)
 897                 return is_type_signed(type->bitfield.base_type);
 898
 899         if (type->kind != TYPE_ATOMIC)
 900                 return false;
 901
 902         return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_SIGNED);
 903 }
 904
 905 /**
 906  * Returns true if the given type represents an arithmetic type.
 907  *
 908  * @param type  The type to check.
 909  * @return True if type represents an arithmetic type.
 910  */
 911 bool is_type_arithmetic(const type_t *type)
 912 {
 913         assert(!is_typeref(type));
 914
 915         switch(type->kind) {
 916         case TYPE_BITFIELD:
 917         case TYPE_ENUM:
 918                 return true;
 919         case TYPE_ATOMIC:
 920                 return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
 921         case TYPE_COMPLEX:
 922                 return test_atomic_type_flag(type->complex.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
 923         case TYPE_IMAGINARY:
 924                 return test_atomic_type_flag(type->imaginary.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
 925         default:
 926                 return false;
 927         }
 928 }
 929
 930 /**
 931  * Returns true if the given type is an integer or float type.
 932  *
 933  * @param type  The type to check.
 934  * @return True if type is an integer or float type.
 935  */
 936 bool is_type_real(const type_t *type)
 937 {
 938         /* 6.2.5 (17) */
 939         return is_type_integer(type) || is_type_float(type);
 940 }
 941
 942 /**
 943  * Returns true if the given type represents a scalar type.
 944  *
 945  * @param type  The type to check.
 946  * @return True if type represents a scalar type.
 947  */
 948 bool is_type_scalar(const type_t *type)
 949 {
 950         assert(!is_typeref(type));
 951
 952         switch (type->kind) {
 953                 case TYPE_POINTER: return true;
 954                 case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
 955                 default:           break;
 956         }
 957
 958         return is_type_arithmetic(type);
 959 }
 960
 961 /**
 962  * Check if a given type is incomplete.
 963  *
 964  * @param type  The type to check.
 965  * @return True if the given type is incomplete (ie. just forward).
 966  */
 967 bool is_type_incomplete(const type_t *type)
 968 {
 969         assert(!is_typeref(type));
 970
 971         switch(type->kind) {
 972         case TYPE_COMPOUND_STRUCT:
 973         case TYPE_COMPOUND_UNION: {
 974                 const compound_type_t *compound_type = &type->compound;
 975                 declaration_t         *declaration   = compound_type->declaration;
 976                 return !declaration->init.complete;
 977         }
 978         case TYPE_ENUM: {
 979                 const enum_type_t *enum_type   = &type->enumt;
 980                 declaration_t     *declaration = enum_type->declaration;
 981                 return !declaration->init.complete;
 982         }
 983
 984         case TYPE_ARRAY:
 985                 return type->array.size_expression == NULL
 986                         && !type->array.size_constant;
 987
 988         case TYPE_ATOMIC:
 989                 return type->atomic.akind == ATOMIC_TYPE_VOID;
 990
 991         case TYPE_COMPLEX:
 992                 return type->complex.akind == ATOMIC_TYPE_VOID;
 993
 994         case TYPE_IMAGINARY:
 995                 return type->imaginary.akind == ATOMIC_TYPE_VOID;
 996
 997         case TYPE_BITFIELD:
 998         case TYPE_FUNCTION:
 999         case TYPE_POINTER:
1000         case TYPE_BUILTIN:
1001         case TYPE_ERROR:
1002                 return false;
1003
1004         case TYPE_TYPEDEF:
1005         case TYPE_TYPEOF:
1006                 panic("is_type_incomplete called without typerefs skipped");
1007         case TYPE_INVALID:
1008                 break;
1009         }
1010
1011         panic("invalid type found");
1012 }
1013
1014 bool is_type_object(const type_t *type)
1015 {
1016         return !is_type_function(type) && !is_type_incomplete(type);
1017 }
1018
1019 /**
1020  * Check if two function types are compatible.
1021  */
1022 static bool function_types_compatible(const function_type_t *func1,
1023                                       const function_type_t *func2)
1024 {
1025         const type_t* const ret1 = skip_typeref(func1->return_type);
1026         const type_t* const ret2 = skip_typeref(func2->return_type);
1027         if (!types_compatible(ret1, ret2))
1028                 return false;
1029
1030         if (func1->calling_convention != func2->calling_convention)
1031                 return false;
1032
1033         /* can parameters be compared? */
1034         if (func1->unspecified_parameters || func2->unspecified_parameters)
1035                 return true;
1036
1037         if (func1->variadic != func2->variadic)
1038                 return false;
1039
1040         /* TODO: handling of unspecified parameters not correct yet */
1041
1042         /* all argument types must be compatible */
1043         function_parameter_t *parameter1 = func1->parameters;
1044         function_parameter_t *parameter2 = func2->parameters;
1045         for ( ; parameter1 != NULL && parameter2 != NULL;
1046                         parameter1 = parameter1->next, parameter2 = parameter2->next) {
1047                 type_t *parameter1_type = skip_typeref(parameter1->type);
1048                 type_t *parameter2_type = skip_typeref(parameter2->type);
1049
1050                 parameter1_type = get_unqualified_type(parameter1_type);
1051                 parameter2_type = get_unqualified_type(parameter2_type);
1052
1053                 if (!types_compatible(parameter1_type, parameter2_type))
1054                         return false;
1055         }
1056         /* same number of arguments? */
1057         if (parameter1 != NULL || parameter2 != NULL)
1058                 return false;
1059
1060         return true;
1061 }
1062
1063 /**
1064  * Check if two array types are compatible.
1065  */
1066 static bool array_types_compatible(const array_type_t *array1,
1067                                    const array_type_t *array2)
1068 {
1069         type_t *element_type1 = skip_typeref(array1->element_type);
1070         type_t *element_type2 = skip_typeref(array2->element_type);
1071         if (!types_compatible(element_type1, element_type2))
1072                 return false;
1073
1074         if (!array1->size_constant || !array2->size_constant)
1075                 return true;
1076
1077         return array1->size == array2->size;
1078 }
1079
1080 /**
1081  * Check if two types are compatible.
1082  */
1083 bool types_compatible(const type_t *type1, const type_t *type2)
1084 {
1085         assert(!is_typeref(type1));
1086         assert(!is_typeref(type2));
1087
1088         /* shortcut: the same type is always compatible */
1089         if (type1 == type2)
1090                 return true;
1091
1092         if (!is_type_valid(type1) || !is_type_valid(type2))
1093                 return true;
1094
1095         if (type1->base.qualifiers != type2->base.qualifiers)
1096                 return false;
1097         if (type1->kind != type2->kind)
1098                 return false;
1099
1100         switch (type1->kind) {
1101         case TYPE_FUNCTION:
1102                 return function_types_compatible(&type1->function, &type2->function);
1103         case TYPE_ATOMIC:
1104                 return type1->atomic.akind == type2->atomic.akind;
1105         case TYPE_COMPLEX:
1106                 return type1->complex.akind == type2->complex.akind;
1107         case TYPE_IMAGINARY:
1108                 return type1->imaginary.akind == type2->imaginary.akind;
1109         case TYPE_ARRAY:
1110                 return array_types_compatible(&type1->array, &type2->array);
1111
1112         case TYPE_POINTER: {
1113                 const type_t *const to1 = skip_typeref(type1->pointer.points_to);
1114                 const type_t *const to2 = skip_typeref(type2->pointer.points_to);
1115                 return types_compatible(to1, to2);
1116         }
1117
1118         case TYPE_COMPOUND_STRUCT:
1119         case TYPE_COMPOUND_UNION:
1120         case TYPE_ENUM:
1121         case TYPE_BUILTIN:
1122                 /* TODO: not implemented */
1123                 break;
1124
1125         case TYPE_BITFIELD:
1126                 /* not sure if this makes sense or is even needed, implement it if you
1127                  * really need it! */
1128                 panic("type compatibility check for bitfield type");
1129
1130         case TYPE_ERROR:
1131                 /* Hmm, the error type should be compatible to all other types */
1132                 return true;
1133         case TYPE_INVALID:
1134                 panic("invalid type found in compatible types");
1135         case TYPE_TYPEDEF:
1136         case TYPE_TYPEOF:
1137                 panic("typerefs not skipped in compatible types?!?");
1138         }
1139
1140         /* TODO: incomplete */
1141         return false;
1142 }
1143
1144 /**
1145  * Skip all typerefs and return the underlying type.
1146  */
1147 type_t *skip_typeref(type_t *type)
1148 {
1149         type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1150         type_modifiers_t  modifiers  = TYPE_MODIFIER_NONE;
1151
1152         while (true) {
1153                 switch (type->kind) {
1154                 case TYPE_ERROR:
1155                         return type;
1156                 case TYPE_TYPEDEF: {
1157                         qualifiers |= type->base.qualifiers;
1158                         modifiers  |= type->base.modifiers;
1159                         const typedef_type_t *typedef_type = &type->typedeft;
1160                         if (typedef_type->resolved_type != NULL) {
1161                                 type = typedef_type->resolved_type;
1162                                 break;
1163                         }
1164                         type = typedef_type->declaration->type;
1165                         continue;
1166                 }
1167                 case TYPE_TYPEOF: {
1168                         const typeof_type_t *typeof_type = &type->typeoft;
1169                         if (typeof_type->typeof_type != NULL) {
1170                                 type = typeof_type->typeof_type;
1171                         } else {
1172                                 type = typeof_type->expression->base.type;
1173                         }
1174                         continue;
1175                 }
1176                 default:
1177                         break;
1178                 }
1179                 break;
1180         }
1181
1182         if (qualifiers != TYPE_QUALIFIER_NONE || modifiers != TYPE_MODIFIER_NONE) {
1183                 type_t *const copy = duplicate_type(type);
1184
1185                 /* for const with typedefed array type the element type has to be
1186                  * adjusted */
1187                 if (is_type_array(copy)) {
1188                         type_t *element_type           = copy->array.element_type;
1189                         element_type                   = duplicate_type(element_type);
1190                         element_type->base.qualifiers |= qualifiers;
1191                         element_type->base.modifiers  |= modifiers;
1192                         copy->array.element_type       = element_type;
1193                 } else {
1194                         copy->base.qualifiers |= qualifiers;
1195                         copy->base.modifiers  |= modifiers;
1196                 }
1197
1198                 type = typehash_insert(copy);
1199                 if (type != copy) {
1200                         obstack_free(type_obst, copy);
1201                 }
1202         }
1203
1204         return type;
1205 }
1206
1207 type_qualifiers_t get_type_qualifier(const type_t *type, bool skip_array_type) {
1208         type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
1209
1210         while (true) {
1211                 switch (type->base.kind) {
1212                 case TYPE_ERROR:
1213                         return TYPE_QUALIFIER_NONE;
1214                 case TYPE_TYPEDEF:
1215                         qualifiers |= type->base.qualifiers;
1216                         const typedef_type_t *typedef_type = &type->typedeft;
1217                         if (typedef_type->resolved_type != NULL)
1218                                 type = typedef_type->resolved_type;
1219                         else
1220                                 type = typedef_type->declaration->type;
1221                         continue;
1222                 case TYPE_TYPEOF: {
1223                         const typeof_type_t *typeof_type = &type->typeoft;
1224                         if (typeof_type->typeof_type != NULL) {
1225                                 type = typeof_type->typeof_type;
1226                         } else {
1227                                 type = typeof_type->expression->base.type;
1228                         }
1229                         continue;
1230                 }
1231                 case TYPE_ARRAY:
1232                         if (skip_array_type) {
1233                                 type = type->array.element_type;
1234                                 continue;
1235                         }
1236                         break;
1237                 default:
1238                         break;
1239                 }
1240                 break;
1241         }
1242         return type->base.qualifiers | qualifiers;
1243 }
1244
1245 unsigned get_atomic_type_size(atomic_type_kind_t kind)
1246 {
1247         assert(kind <= ATOMIC_TYPE_LAST);
1248         return atomic_type_properties[kind].size;
1249 }
1250
1251 unsigned get_atomic_type_alignment(atomic_type_kind_t kind)
1252 {
1253         assert(kind <= ATOMIC_TYPE_LAST);
1254         return atomic_type_properties[kind].alignment;
1255 }
1256
1257 unsigned get_atomic_type_flags(atomic_type_kind_t kind)
1258 {
1259         assert(kind <= ATOMIC_TYPE_LAST);
1260         return atomic_type_properties[kind].flags;
1261 }
1262
1263 atomic_type_kind_t get_intptr_kind(void)
1264 {
1265         if (machine_size <= 32)
1266                 return ATOMIC_TYPE_INT;
1267         else if (machine_size <= 64)
1268                 return ATOMIC_TYPE_LONG;
1269         else
1270                 return ATOMIC_TYPE_LONGLONG;
1271 }
1272
1273 atomic_type_kind_t get_uintptr_kind(void)
1274 {
1275         if (machine_size <= 32)
1276                 return ATOMIC_TYPE_UINT;
1277         else if (machine_size <= 64)
1278                 return ATOMIC_TYPE_ULONG;
1279         else
1280                 return ATOMIC_TYPE_ULONGLONG;
1281 }
1282
1283 /**
1284  * Find the atomic type kind representing a given size (signed).
1285  */
1286 atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size) {
1287         static atomic_type_kind_t kinds[32];
1288
1289         assert(size < 32);
1290         atomic_type_kind_t kind = kinds[size];
1291         if (kind == ATOMIC_TYPE_INVALID) {
1292                 static const atomic_type_kind_t possible_kinds[] = {
1293                         ATOMIC_TYPE_SCHAR,
1294                         ATOMIC_TYPE_SHORT,
1295                         ATOMIC_TYPE_INT,
1296                         ATOMIC_TYPE_LONG,
1297                         ATOMIC_TYPE_LONGLONG
1298                 };
1299                 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1300                         if (get_atomic_type_size(possible_kinds[i]) == size) {
1301                                 kind = possible_kinds[i];
1302                                 break;
1303                         }
1304                 }
1305                 kinds[size] = kind;
1306         }
1307         return kind;
1308 }
1309
1310 /**
1311  * Find the atomic type kind representing a given size (signed).
1312  */
1313 atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size) {
1314         static atomic_type_kind_t kinds[32];
1315
1316         assert(size < 32);
1317         atomic_type_kind_t kind = kinds[size];
1318         if (kind == ATOMIC_TYPE_INVALID) {
1319                 static const atomic_type_kind_t possible_kinds[] = {
1320                         ATOMIC_TYPE_UCHAR,
1321                         ATOMIC_TYPE_USHORT,
1322                         ATOMIC_TYPE_UINT,
1323                         ATOMIC_TYPE_ULONG,
1324                         ATOMIC_TYPE_ULONGLONG
1325                 };
1326                 for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
1327                         if (get_atomic_type_size(possible_kinds[i]) == size) {
1328                                 kind = possible_kinds[i];
1329                                 break;
1330                         }
1331                 }
1332                 kinds[size] = kind;
1333         }
1334         return kind;
1335 }
1336
1337 /**
1338  * Hash the given type and return the "singleton" version
1339  * of it.
1340  */
1341 static type_t *identify_new_type(type_t *type)
1342 {
1343         type_t *result = typehash_insert(type);
1344         if (result != type) {
1345                 obstack_free(type_obst, type);
1346         }
1347         return result;
1348 }
1349
1350 /**
1351  * Creates a new atomic type.
1352  *
1353  * @param akind       The kind of the atomic type.
1354  * @param qualifiers  Type qualifiers for the new type.
1355  */
1356 type_t *make_atomic_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1357 {
1358         type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
1359         memset(type, 0, sizeof(atomic_type_t));
1360
1361         type->kind            = TYPE_ATOMIC;
1362         type->base.size       = get_atomic_type_size(akind);
1363         type->base.alignment  = get_atomic_type_alignment(akind);
1364         type->base.qualifiers = qualifiers;
1365         type->atomic.akind    = akind;
1366
1367         return identify_new_type(type);
1368 }
1369
1370 /**
1371  * Creates a new complex type.
1372  *
1373  * @param akind       The kind of the atomic type.
1374  * @param qualifiers  Type qualifiers for the new type.
1375  */
1376 type_t *make_complex_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1377 {
1378         type_t *type = obstack_alloc(type_obst, sizeof(complex_type_t));
1379         memset(type, 0, sizeof(complex_type_t));
1380
1381         type->kind            = TYPE_COMPLEX;
1382         type->base.qualifiers = qualifiers;
1383         type->base.alignment  = get_atomic_type_alignment(akind);
1384         type->complex.akind   = akind;
1385
1386         return identify_new_type(type);
1387 }
1388
1389 /**
1390  * Creates a new imaginary type.
1391  *
1392  * @param akind       The kind of the atomic type.
1393  * @param qualifiers  Type qualifiers for the new type.
1394  */
1395 type_t *make_imaginary_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
1396 {
1397         type_t *type = obstack_alloc(type_obst, sizeof(imaginary_type_t));
1398         memset(type, 0, sizeof(imaginary_type_t));
1399
1400         type->kind            = TYPE_IMAGINARY;
1401         type->base.qualifiers = qualifiers;
1402         type->base.alignment  = get_atomic_type_alignment(akind);
1403         type->imaginary.akind = akind;
1404
1405         return identify_new_type(type);
1406 }
1407
1408 /**
1409  * Creates a new pointer type.
1410  *
1411  * @param points_to   The points-to type for the new type.
1412  * @param qualifiers  Type qualifiers for the new type.
1413  */
1414 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
1415 {
1416         type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
1417         memset(type, 0, sizeof(pointer_type_t));
1418
1419         type->kind              = TYPE_POINTER;
1420         type->base.qualifiers   = qualifiers;
1421         type->base.alignment    = 0;
1422         type->pointer.points_to = points_to;
1423
1424         return identify_new_type(type);
1425 }
1426
1427 type_t *make_array_type(type_t *element_type, size_t size,
1428                         type_qualifiers_t qualifiers)
1429 {
1430         type_t *type = obstack_alloc(type_obst, sizeof(array_type_t));
1431         memset(type, 0, sizeof(array_type_t));
1432
1433         type->kind                = TYPE_ARRAY;
1434         type->base.qualifiers     = qualifiers;
1435         type->base.alignment      = 0;
1436         type->array.element_type  = element_type;
1437         type->array.size          = size;
1438         type->array.size_constant = true;
1439
1440         return identify_new_type(type);
1441 }
1442
1443 /**
1444  * Debug helper. Prints the given type to stdout.
1445  */
1446 static __attribute__((unused))
1447 void dbg_type(const type_t *type)
1448 {
1449         FILE *old_out = out;
1450         out = stderr;
1451         print_type(type);
1452         puts("\n");
1453         fflush(stderr);
1454         out = old_out;
1455 }