nsz Git - cparser/blob - type.c

   1 #include <config.h>
   2
   3 #include <stdio.h>
   4 #include <assert.h>
   5 #include "type_t.h"
   6 #include "type_hash.h"
   7 #include "adt/error.h"
   8
   9 static struct obstack   _type_obst;
  10 struct obstack         *type_obst = &_type_obst;
  11 static FILE            *out;
  12 static int              type_visited = 0;
  13
  14 static void intern_print_type_pre(type_t *type);
  15 static void intern_print_type_post(type_t *type);
  16
  17 void init_types(void)
  18 {
  19         obstack_init(type_obst);
  20 }
  21
  22 void exit_types(void)
  23 {
  24         obstack_free(type_obst, NULL);
  25 }
  26
  27 void type_set_output(FILE *stream)
  28 {
  29         out = stream;
  30 }
  31
  32 void inc_type_visited(void)
  33 {
  34         type_visited++;
  35 }
  36
  37 void print_type_qualifiers(type_qualifiers_t qualifiers)
  38 {
  39         if(qualifiers & TYPE_QUALIFIER_CONST)    fputs("const ",    out);
  40         if(qualifiers & TYPE_QUALIFIER_VOLATILE) fputs("volatile ", out);
  41         if(qualifiers & TYPE_QUALIFIER_RESTRICT) fputs("restrict ", out);
  42 }
  43
  44 static
  45 void print_atomic_type(const atomic_type_t *type)
  46 {
  47         print_type_qualifiers(type->type.qualifiers);
  48
  49         const char *s;
  50         switch(type->atype) {
  51         case ATOMIC_TYPE_INVALID:     s = "INVALIDATOMIC";      break;
  52         case ATOMIC_TYPE_VOID:        s = "void";               break;
  53         case ATOMIC_TYPE_BOOL:        s = "_Bool";              break;
  54         case ATOMIC_TYPE_CHAR:        s = "char";               break;
  55         case ATOMIC_TYPE_SCHAR:       s = "signed char";        break;
  56         case ATOMIC_TYPE_UCHAR:       s = "unsigned char";      break;
  57         case ATOMIC_TYPE_INT:         s = "int";                break;
  58         case ATOMIC_TYPE_UINT:        s = "unsigned int";       break;
  59         case ATOMIC_TYPE_SHORT:       s = "short";              break;
  60         case ATOMIC_TYPE_USHORT:      s = "unsigned short";     break;
  61         case ATOMIC_TYPE_LONG:        s = "long";               break;
  62         case ATOMIC_TYPE_ULONG:       s = "unsigned long";      break;
  63         case ATOMIC_TYPE_LONGLONG:    s = "long long";          break;
  64         case ATOMIC_TYPE_ULONGLONG:   s = "unsigned long long"; break;
  65         case ATOMIC_TYPE_LONG_DOUBLE: s = "long double";        break;
  66         case ATOMIC_TYPE_FLOAT:       s = "float";              break;
  67         case ATOMIC_TYPE_DOUBLE:      s = "double";             break;
  68         default:                      s = "UNKNOWNATOMIC";      break;
  69         }
  70         fputs(s, out);
  71 }
  72
  73 static void print_function_type_pre(const function_type_t *type)
  74 {
  75         print_type_qualifiers(type->type.qualifiers);
  76
  77         intern_print_type_pre(type->result_type);
  78
  79         /* TODO: don't emit braces if we're the toplevel type... */
  80         fputc('(', out);
  81 }
  82
  83 static void print_function_type_post(const function_type_t *type,
  84                                      const context_t *context)
  85 {
  86         /* TODO: don't emit braces if we're the toplevel type... */
  87         intern_print_type_post(type->result_type);
  88         fputc(')', out);
  89
  90         fputc('(', out);
  91
  92         int                 first     = 1;
  93         if(context == NULL) {
  94                 function_parameter_t *parameter = type->parameters;
  95                 for( ; parameter != NULL; parameter = parameter->next) {
  96                         if(first) {
  97                                 first = 0;
  98                         } else {
  99                                 fputs(", ", out);
 100                         }
 101                         print_type(parameter->type);
 102                 }
 103         } else {
 104                 declaration_t *parameter = context->declarations;
 105                 for( ; parameter != NULL; parameter = parameter->next) {
 106                         if(first) {
 107                                 first = 0;
 108                         } else {
 109                                 fputs(", ", out);
 110                         }
 111                         print_type_ext(parameter->type, parameter->symbol,
 112                                        &parameter->context);
 113                 }
 114         }
 115         if(type->variadic) {
 116                 if(first) {
 117                         first = 0;
 118                 } else {
 119                         fputs(", ", out);
 120                 }
 121                 fputs("...", out);
 122         }
 123         if(first && !type->unspecified_parameters) {
 124                 fputs("void", out);
 125         }
 126         fputc(')', out);
 127 }
 128
 129 static void print_pointer_type_pre(const pointer_type_t *type)
 130 {
 131         intern_print_type_pre(type->points_to);
 132         fputs("*", out);
 133         print_type_qualifiers(type->type.qualifiers);
 134 }
 135
 136 static void print_pointer_type_post(const pointer_type_t *type)
 137 {
 138         intern_print_type_post(type->points_to);
 139 }
 140
 141 static void print_array_type_pre(const array_type_t *type)
 142 {
 143         intern_print_type_pre(type->element_type);
 144 }
 145
 146 static void print_array_type_post(const array_type_t *type)
 147 {
 148         fputc('[', out);
 149         if(type->is_static) {
 150                 fputs("static ", out);
 151         }
 152         print_type_qualifiers(type->type.qualifiers);
 153         if(type->size != NULL) {
 154                 print_expression(type->size);
 155         }
 156         fputc(']', out);
 157         intern_print_type_post(type->element_type);
 158 }
 159
 160 void print_enum_definition(const declaration_t *declaration)
 161 {
 162         fputs("{\n", out);
 163
 164         change_indent(1);
 165
 166         declaration_t *entry = declaration->next;
 167         for( ; entry != NULL && entry->storage_class == STORAGE_CLASS_ENUM_ENTRY;
 168                entry = entry->next) {
 169
 170                 print_indent();
 171                 fprintf(out, "%s", entry->symbol->string);
 172                 if(entry->init.initializer != NULL) {
 173                         fprintf(out, " = ");
 174                         print_expression(entry->init.enum_value);
 175                 }
 176                 fprintf(out, ",\n");
 177         }
 178
 179         change_indent(-1);
 180         print_indent();
 181         fputs("}", out);
 182 }
 183
 184 static void print_type_enum(const enum_type_t *type)
 185 {
 186         print_type_qualifiers(type->type.qualifiers);
 187         fputs("enum ", out);
 188
 189         declaration_t *declaration = type->declaration;
 190         symbol_t      *symbol      = declaration->symbol;
 191         if(symbol != NULL) {
 192                 fputs(symbol->string, out);
 193         } else {
 194                 print_enum_definition(declaration);
 195         }
 196 }
 197
 198 void print_compound_definition(const declaration_t *declaration)
 199 {
 200         fputs("{\n", out);
 201         change_indent(1);
 202
 203         declaration_t *iter = declaration->context.declarations;
 204         for( ; iter != NULL; iter = iter->next) {
 205                 print_indent();
 206                 print_declaration(iter);
 207                 fputc('\n', out);
 208         }
 209
 210         change_indent(-1);
 211         print_indent();
 212         fputs("}", out);
 213 }
 214
 215 static void print_compound_type(const compound_type_t *type)
 216 {
 217         print_type_qualifiers(type->type.qualifiers);
 218
 219         if(type->type.type == TYPE_COMPOUND_STRUCT) {
 220                 fputs("struct ", out);
 221         } else {
 222                 assert(type->type.type == TYPE_COMPOUND_UNION);
 223                 fputs("union ", out);
 224         }
 225
 226         declaration_t *declaration = type->declaration;
 227         symbol_t      *symbol      = declaration->symbol;
 228         if(symbol != NULL) {
 229                 fputs(symbol->string, out);
 230         } else {
 231                 print_compound_definition(declaration);
 232         }
 233 }
 234
 235 static void print_typedef_type_pre(typedef_type_t *type)
 236 {
 237         fputs(type->declaration->symbol->string, out);
 238 }
 239
 240 static void print_typeof_type_pre(typeof_type_t *type)
 241 {
 242         fputs("typeof(", out);
 243         if(type->expression != NULL) {
 244                 assert(type->typeof_type == NULL);
 245                 print_expression(type->expression);
 246         } else {
 247                 print_type(type->typeof_type);
 248         }
 249         fputc(')', out);
 250 }
 251
 252 static void intern_print_type_pre(type_t *type)
 253 {
 254         switch(type->type) {
 255         case TYPE_COUNT:
 256         case TYPE_INVALID:
 257                 fputs("invalid", out);
 258                 return;
 259         case TYPE_ENUM:
 260                 print_type_enum(&type->enumt);
 261                 return;
 262         case TYPE_ATOMIC:
 263                 print_atomic_type(&type->atomic);
 264                 return;
 265         case TYPE_COMPOUND_STRUCT:
 266         case TYPE_COMPOUND_UNION:
 267                 print_compound_type(&type->compound);
 268                 return;
 269         case TYPE_BUILTIN:
 270                 fputs(type->builtin.symbol->string, out);
 271                 return;
 272         case TYPE_FUNCTION:
 273                 print_function_type_pre(&type->function);
 274                 return;
 275         case TYPE_POINTER:
 276                 print_pointer_type_pre(&type->pointer);
 277                 return;
 278         case TYPE_ARRAY:
 279                 print_array_type_pre(&type->array);
 280                 return;
 281         case TYPE_TYPEDEF:
 282                 print_typedef_type_pre(&type->typedeft);
 283                 return;
 284         case TYPE_TYPEOF:
 285                 print_typeof_type_pre(&type->typeoft);
 286                 return;
 287         }
 288         fputs("unknown", out);
 289 }
 290
 291 static void intern_print_type_post(type_t *type)
 292 {
 293         switch(type->type) {
 294         case TYPE_FUNCTION:
 295                 print_function_type_post(&type->function, NULL);
 296                 return;
 297         case TYPE_POINTER:
 298                 print_pointer_type_post(&type->pointer);
 299                 return;
 300         case TYPE_ARRAY:
 301                 print_array_type_post(&type->array);
 302                 return;
 303         case TYPE_INVALID:
 304         case TYPE_COUNT:
 305         case TYPE_ATOMIC:
 306         case TYPE_ENUM:
 307         case TYPE_COMPOUND_STRUCT:
 308         case TYPE_COMPOUND_UNION:
 309         case TYPE_BUILTIN:
 310         case TYPE_TYPEOF:
 311         case TYPE_TYPEDEF:
 312                 break;
 313         }
 314 }
 315
 316 void print_type(type_t *type)
 317 {
 318         print_type_ext(type, NULL, NULL);
 319 }
 320
 321 void print_type_ext(type_t *type, const symbol_t *symbol,
 322                     const context_t *context)
 323 {
 324         if(type == NULL) {
 325                 fputs("nil type", out);
 326                 return;
 327         }
 328
 329         intern_print_type_pre(type);
 330         if(symbol != NULL) {
 331                 fputc(' ', out);
 332                 fputs(symbol->string, out);
 333         }
 334         if(type->type == TYPE_FUNCTION) {
 335                 print_function_type_post((const function_type_t*) type, context);
 336         } else {
 337                 intern_print_type_post(type);
 338         }
 339 }
 340
 341 bool type_valid(const type_t *type)
 342 {
 343         return type->type != TYPE_INVALID;
 344 }
 345
 346 bool is_type_integer(const type_t *type)
 347 {
 348         assert(!is_typeref(type));
 349
 350         if(type->type == TYPE_ENUM)
 351                 return true;
 352
 353         if(type->type != TYPE_ATOMIC)
 354                 return false;
 355
 356         switch(type->atomic.atype) {
 357         case ATOMIC_TYPE_BOOL:
 358         case ATOMIC_TYPE_CHAR:
 359         case ATOMIC_TYPE_SCHAR:
 360         case ATOMIC_TYPE_UCHAR:
 361         case ATOMIC_TYPE_SHORT:
 362         case ATOMIC_TYPE_USHORT:
 363         case ATOMIC_TYPE_INT:
 364         case ATOMIC_TYPE_UINT:
 365         case ATOMIC_TYPE_LONG:
 366         case ATOMIC_TYPE_ULONG:
 367         case ATOMIC_TYPE_LONGLONG:
 368         case ATOMIC_TYPE_ULONGLONG:
 369                 return true;
 370         default:
 371                 return false;
 372         }
 373 }
 374
 375 bool is_type_floating(const type_t *type)
 376 {
 377         assert(!is_typeref(type));
 378
 379         if(type->type != TYPE_ATOMIC)
 380                 return false;
 381
 382         switch(type->atomic.atype) {
 383         case ATOMIC_TYPE_FLOAT:
 384         case ATOMIC_TYPE_DOUBLE:
 385         case ATOMIC_TYPE_LONG_DOUBLE:
 386 #ifdef PROVIDE_COMPLEX
 387         case ATOMIC_TYPE_FLOAT_COMPLEX:
 388         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 389         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 390         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 391         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 392         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 393 #endif
 394                 return true;
 395         default:
 396                 return false;
 397         }
 398 }
 399
 400 bool is_type_signed(const type_t *type)
 401 {
 402         assert(!is_typeref(type));
 403
 404         /* enum types are int for now */
 405         if(type->type == TYPE_ENUM)
 406                 return true;
 407
 408         if(type->type != TYPE_ATOMIC)
 409                 return false;
 410
 411         switch(type->atomic.atype) {
 412         case ATOMIC_TYPE_CHAR:
 413         case ATOMIC_TYPE_SCHAR:
 414         case ATOMIC_TYPE_SHORT:
 415         case ATOMIC_TYPE_INT:
 416         case ATOMIC_TYPE_LONG:
 417         case ATOMIC_TYPE_LONGLONG:
 418         case ATOMIC_TYPE_FLOAT:
 419         case ATOMIC_TYPE_DOUBLE:
 420         case ATOMIC_TYPE_LONG_DOUBLE:
 421 #ifdef PROVIDE_COMPLEX
 422         case ATOMIC_TYPE_FLOAT_COMPLEX:
 423         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 424         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 425         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 426         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 427         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 428 #endif
 429                 return true;
 430
 431         case ATOMIC_TYPE_BOOL:
 432         case ATOMIC_TYPE_UCHAR:
 433         case ATOMIC_TYPE_USHORT:
 434         case ATOMIC_TYPE_UINT:
 435         case ATOMIC_TYPE_ULONG:
 436         case ATOMIC_TYPE_ULONGLONG:
 437                 return false;
 438
 439         case ATOMIC_TYPE_INVALID:
 440         case ATOMIC_TYPE_VOID:
 441                 return false;
 442         }
 443
 444         panic("invalid atomic type found");
 445         return false;
 446 }
 447
 448 bool is_type_arithmetic(const type_t *type)
 449 {
 450         assert(!is_typeref(type));
 451
 452         if(is_type_integer(type) || is_type_floating(type))
 453                 return 1;
 454
 455         return 0;
 456 }
 457
 458 bool is_type_scalar(const type_t *type)
 459 {
 460         assert(!is_typeref(type));
 461
 462         if(type->type == TYPE_POINTER)
 463                 return 1;
 464
 465         return is_type_arithmetic(type);
 466 }
 467
 468 bool is_type_incomplete(const type_t *type)
 469 {
 470         assert(!is_typeref(type));
 471
 472         switch(type->type) {
 473         case TYPE_COMPOUND_STRUCT:
 474         case TYPE_COMPOUND_UNION: {
 475                 const compound_type_t *compound_type = &type->compound;
 476                 declaration_t         *declaration   = compound_type->declaration;
 477                 return !declaration->init.is_defined;
 478         }
 479         case TYPE_FUNCTION:
 480                 return true;
 481
 482         case TYPE_ARRAY:
 483                 return type->array.size == NULL;
 484
 485         case TYPE_ATOMIC:
 486         case TYPE_POINTER:
 487         case TYPE_ENUM:
 488                 return false;
 489
 490         case TYPE_TYPEDEF:
 491         case TYPE_TYPEOF:
 492         case TYPE_BUILTIN:
 493                 panic("is_type_incomplete called without typerefs skipped");
 494         case TYPE_COUNT:
 495         case TYPE_INVALID:
 496                 break;
 497         }
 498
 499         panic("invalid type found");
 500 }
 501
 502 bool types_compatible(const type_t *type1, const type_t *type2)
 503 {
 504         assert(!is_typeref(type1));
 505         assert(!is_typeref(type2));
 506
 507         /* TODO: really incomplete */
 508         if(type1 == type2)
 509                 return true;
 510
 511         if(type1->type == TYPE_ATOMIC && type2->type == TYPE_ATOMIC) {
 512                 return type1->atomic.atype == type2->atomic.atype;
 513         }
 514
 515         return false;
 516 }
 517
 518 bool pointers_compatible(const type_t *type1, const type_t *type2)
 519 {
 520         assert(!is_typeref(type1));
 521         assert(!is_typeref(type2));
 522
 523         assert(type1->type == TYPE_POINTER);
 524         assert(type2->type == TYPE_POINTER);
 525         /* TODO */
 526         return true;
 527 }
 528
 529 static size_t get_type_size(type_t *type)
 530 {
 531         switch(type->type) {
 532         case TYPE_ATOMIC:          return sizeof(atomic_type_t); break;
 533         case TYPE_COMPOUND_STRUCT:
 534         case TYPE_COMPOUND_UNION:  return sizeof(compound_type_t); break;
 535         case TYPE_ENUM:            return sizeof(enum_type_t); break;
 536         case TYPE_FUNCTION:        return sizeof(function_type_t); break;
 537         case TYPE_POINTER:         return sizeof(pointer_type_t); break;
 538         case TYPE_ARRAY:           return sizeof(array_type_t); break;
 539         case TYPE_BUILTIN:         return sizeof(builtin_type_t); break;
 540         case TYPE_TYPEDEF:         return sizeof(typedef_type_t); break;
 541         case TYPE_TYPEOF:          return sizeof(typeof_type_t); break;
 542         case TYPE_COUNT:
 543         case TYPE_INVALID:         panic("invalid type found"); break;
 544         }
 545         panic("unknown type found");
 546 }
 547
 548 /**
 549  * duplicates a type
 550  * note that this does not produce a deep copy!
 551  */
 552 static type_t *duplicate_type(type_t *type)
 553 {
 554         size_t size = get_type_size(type);
 555
 556         type_t *copy = obstack_alloc(type_obst, size);
 557         memcpy(copy, type, size);
 558
 559         (void) duplicate_type;
 560
 561         return type;
 562 }
 563
 564 type_t *skip_typeref(type_t *type)
 565 {
 566         unsigned qualifiers = type->base.qualifiers;
 567
 568         while(1) {
 569                 switch(type->type) {
 570                 case TYPE_TYPEDEF: {
 571                         qualifiers |= type->base.qualifiers;
 572                         const typedef_type_t *typedef_type = &type->typedeft;
 573                         if(typedef_type->resolved_type != NULL) {
 574                                 type = typedef_type->resolved_type;
 575                                 break;
 576                         }
 577                         type = typedef_type->declaration->type;
 578                         continue;
 579                 }
 580                 case TYPE_TYPEOF: {
 581                         const typeof_type_t *typeof_type = &type->typeoft;
 582                         if(typeof_type->typeof_type != NULL) {
 583                                 type = typeof_type->typeof_type;
 584                         } else {
 585                                 type = typeof_type->expression->base.datatype;
 586                         }
 587                         continue;
 588                 }
 589                 case TYPE_BUILTIN: {
 590                         const builtin_type_t *builtin_type = &type->builtin;
 591                         type = builtin_type->real_type;
 592                         continue;
 593                 }
 594                 default:
 595                         break;
 596                 }
 597                 break;
 598         }
 599
 600         return type;
 601 }
 602
 603
 604
 605 static type_t *identify_new_type(type_t *type)
 606 {
 607         type_t *result = typehash_insert(type);
 608         if(result != type) {
 609                 obstack_free(type_obst, type);
 610         }
 611         return result;
 612 }
 613
 614 type_t *make_atomic_type(atomic_type_type_t atype, type_qualifiers_t qualifiers)
 615 {
 616         type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
 617         memset(type, 0, sizeof(atomic_type_t));
 618
 619         type->type            = TYPE_ATOMIC;
 620         type->base.qualifiers = qualifiers;
 621         type->atomic.atype    = atype;
 622
 623         return identify_new_type(type);
 624 }
 625
 626 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
 627 {
 628         type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
 629         memset(type, 0, sizeof(pointer_type_t));
 630
 631         type->type              = TYPE_POINTER;
 632         type->base.qualifiers   = qualifiers;
 633         type->pointer.points_to = points_to;
 634
 635         return identify_new_type(type);
 636 }
 637
 638 static __attribute__((unused))
 639 void dbg_type(type_t *type)
 640 {
 641         FILE *old_out = out;
 642         out = stderr;
 643         print_type(type);
 644         puts("\n");
 645         fflush(stderr);
 646         out = old_out;
 647 }