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_INVALID:
 256                 fputs("invalid", out);
 257                 return;
 258         case TYPE_ENUM:
 259                 print_type_enum(&type->enumt);
 260                 return;
 261         case TYPE_ATOMIC:
 262                 print_atomic_type(&type->atomic);
 263                 return;
 264         case TYPE_COMPOUND_STRUCT:
 265         case TYPE_COMPOUND_UNION:
 266                 print_compound_type(&type->compound);
 267                 return;
 268         case TYPE_BUILTIN:
 269                 fputs(type->builtin.symbol->string, out);
 270                 return;
 271         case TYPE_FUNCTION:
 272                 print_function_type_pre(&type->function);
 273                 return;
 274         case TYPE_POINTER:
 275                 print_pointer_type_pre(&type->pointer);
 276                 return;
 277         case TYPE_ARRAY:
 278                 print_array_type_pre(&type->array);
 279                 return;
 280         case TYPE_TYPEDEF:
 281                 print_typedef_type_pre(&type->typedeft);
 282                 return;
 283         case TYPE_TYPEOF:
 284                 print_typeof_type_pre(&type->typeoft);
 285                 return;
 286         }
 287         fputs("unknown", out);
 288 }
 289
 290 static void intern_print_type_post(type_t *type)
 291 {
 292         switch(type->type) {
 293         case TYPE_FUNCTION:
 294                 print_function_type_post(&type->function, NULL);
 295                 return;
 296         case TYPE_POINTER:
 297                 print_pointer_type_post(&type->pointer);
 298                 return;
 299         case TYPE_ARRAY:
 300                 print_array_type_post(&type->array);
 301                 return;
 302         case TYPE_INVALID:
 303         case TYPE_ATOMIC:
 304         case TYPE_ENUM:
 305         case TYPE_COMPOUND_STRUCT:
 306         case TYPE_COMPOUND_UNION:
 307         case TYPE_BUILTIN:
 308         case TYPE_TYPEOF:
 309         case TYPE_TYPEDEF:
 310                 break;
 311         }
 312 }
 313
 314 void print_type(type_t *type)
 315 {
 316         print_type_ext(type, NULL, NULL);
 317 }
 318
 319 void print_type_ext(type_t *type, const symbol_t *symbol,
 320                     const context_t *context)
 321 {
 322         if(type == NULL) {
 323                 fputs("nil type", out);
 324                 return;
 325         }
 326
 327         intern_print_type_pre(type);
 328         if(symbol != NULL) {
 329                 fputc(' ', out);
 330                 fputs(symbol->string, out);
 331         }
 332         if(type->type == TYPE_FUNCTION) {
 333                 print_function_type_post((const function_type_t*) type, context);
 334         } else {
 335                 intern_print_type_post(type);
 336         }
 337 }
 338
 339 bool type_valid(const type_t *type)
 340 {
 341         return type->type != TYPE_INVALID;
 342 }
 343
 344 bool is_type_integer(const type_t *type)
 345 {
 346         assert(!is_typeref(type));
 347
 348         if(type->type == TYPE_ENUM)
 349                 return true;
 350
 351         if(type->type != TYPE_ATOMIC)
 352                 return false;
 353
 354         switch(type->atomic.atype) {
 355         case ATOMIC_TYPE_BOOL:
 356         case ATOMIC_TYPE_CHAR:
 357         case ATOMIC_TYPE_SCHAR:
 358         case ATOMIC_TYPE_UCHAR:
 359         case ATOMIC_TYPE_SHORT:
 360         case ATOMIC_TYPE_USHORT:
 361         case ATOMIC_TYPE_INT:
 362         case ATOMIC_TYPE_UINT:
 363         case ATOMIC_TYPE_LONG:
 364         case ATOMIC_TYPE_ULONG:
 365         case ATOMIC_TYPE_LONGLONG:
 366         case ATOMIC_TYPE_ULONGLONG:
 367                 return true;
 368         default:
 369                 return false;
 370         }
 371 }
 372
 373 bool is_type_floating(const type_t *type)
 374 {
 375         assert(!is_typeref(type));
 376
 377         if(type->type != TYPE_ATOMIC)
 378                 return false;
 379
 380         switch(type->atomic.atype) {
 381         case ATOMIC_TYPE_FLOAT:
 382         case ATOMIC_TYPE_DOUBLE:
 383         case ATOMIC_TYPE_LONG_DOUBLE:
 384 #ifdef PROVIDE_COMPLEX
 385         case ATOMIC_TYPE_FLOAT_COMPLEX:
 386         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 387         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 388         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 389         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 390         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 391 #endif
 392                 return true;
 393         default:
 394                 return false;
 395         }
 396 }
 397
 398 bool is_type_signed(const type_t *type)
 399 {
 400         assert(!is_typeref(type));
 401
 402         /* enum types are int for now */
 403         if(type->type == TYPE_ENUM)
 404                 return true;
 405
 406         if(type->type != TYPE_ATOMIC)
 407                 return false;
 408
 409         switch(type->atomic.atype) {
 410         case ATOMIC_TYPE_CHAR:
 411         case ATOMIC_TYPE_SCHAR:
 412         case ATOMIC_TYPE_SHORT:
 413         case ATOMIC_TYPE_INT:
 414         case ATOMIC_TYPE_LONG:
 415         case ATOMIC_TYPE_LONGLONG:
 416         case ATOMIC_TYPE_FLOAT:
 417         case ATOMIC_TYPE_DOUBLE:
 418         case ATOMIC_TYPE_LONG_DOUBLE:
 419 #ifdef PROVIDE_COMPLEX
 420         case ATOMIC_TYPE_FLOAT_COMPLEX:
 421         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 422         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 423         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 424         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 425         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 426 #endif
 427                 return true;
 428
 429         case ATOMIC_TYPE_BOOL:
 430         case ATOMIC_TYPE_UCHAR:
 431         case ATOMIC_TYPE_USHORT:
 432         case ATOMIC_TYPE_UINT:
 433         case ATOMIC_TYPE_ULONG:
 434         case ATOMIC_TYPE_ULONGLONG:
 435                 return false;
 436
 437         case ATOMIC_TYPE_INVALID:
 438         case ATOMIC_TYPE_VOID:
 439                 return false;
 440         }
 441
 442         panic("invalid atomic type found");
 443         return false;
 444 }
 445
 446 bool is_type_arithmetic(const type_t *type)
 447 {
 448         assert(!is_typeref(type));
 449
 450         if(is_type_integer(type) || is_type_floating(type))
 451                 return 1;
 452
 453         return 0;
 454 }
 455
 456 bool is_type_scalar(const type_t *type)
 457 {
 458         assert(!is_typeref(type));
 459
 460         if(type->type == TYPE_POINTER)
 461                 return 1;
 462
 463         return is_type_arithmetic(type);
 464 }
 465
 466 bool is_type_incomplete(const type_t *type)
 467 {
 468         assert(!is_typeref(type));
 469
 470         switch(type->type) {
 471         case TYPE_COMPOUND_STRUCT:
 472         case TYPE_COMPOUND_UNION: {
 473                 const compound_type_t *compound_type = &type->compound;
 474                 declaration_t         *declaration   = compound_type->declaration;
 475                 return !declaration->init.is_defined;
 476         }
 477         case TYPE_FUNCTION:
 478                 return true;
 479
 480         case TYPE_ARRAY:
 481                 return type->array.size == NULL;
 482
 483         case TYPE_ATOMIC:
 484         case TYPE_POINTER:
 485         case TYPE_ENUM:
 486                 return false;
 487
 488         case TYPE_TYPEDEF:
 489         case TYPE_TYPEOF:
 490         case TYPE_BUILTIN:
 491                 panic("is_type_incomplete called without typerefs skipped");
 492         case TYPE_INVALID:
 493                 break;
 494         }
 495
 496         panic("invalid type found");
 497 }
 498
 499 bool types_compatible(const type_t *type1, const type_t *type2)
 500 {
 501         assert(!is_typeref(type1));
 502         assert(!is_typeref(type2));
 503
 504         /* TODO: really incomplete */
 505         if(type1 == type2)
 506                 return true;
 507
 508         if(type1->type == TYPE_ATOMIC && type2->type == TYPE_ATOMIC) {
 509                 return type1->atomic.atype == type2->atomic.atype;
 510         }
 511
 512         return false;
 513 }
 514
 515 bool pointers_compatible(const type_t *type1, const type_t *type2)
 516 {
 517         assert(!is_typeref(type1));
 518         assert(!is_typeref(type2));
 519
 520         assert(type1->type == TYPE_POINTER);
 521         assert(type2->type == TYPE_POINTER);
 522         /* TODO */
 523         return true;
 524 }
 525
 526 static size_t get_type_size(type_t *type)
 527 {
 528         switch(type->type) {
 529         case TYPE_ATOMIC:          return sizeof(atomic_type_t); break;
 530         case TYPE_COMPOUND_STRUCT:
 531         case TYPE_COMPOUND_UNION:  return sizeof(compound_type_t); break;
 532         case TYPE_ENUM:            return sizeof(enum_type_t); break;
 533         case TYPE_FUNCTION:        return sizeof(function_type_t); break;
 534         case TYPE_POINTER:         return sizeof(pointer_type_t); break;
 535         case TYPE_ARRAY:           return sizeof(array_type_t); break;
 536         case TYPE_BUILTIN:         return sizeof(builtin_type_t); break;
 537         case TYPE_TYPEDEF:         return sizeof(typedef_type_t); break;
 538         case TYPE_TYPEOF:          return sizeof(typeof_type_t); break;
 539         case TYPE_INVALID:         panic("invalid type found"); break;
 540         }
 541         panic("unknown type found");
 542 }
 543
 544 /**
 545  * duplicates a type
 546  * note that this does not produce a deep copy!
 547  */
 548 type_t *duplicate_type(type_t *type)
 549 {
 550         size_t size = get_type_size(type);
 551
 552         type_t *copy = obstack_alloc(type_obst, size);
 553         memcpy(copy, type, size);
 554
 555         (void) duplicate_type;
 556
 557         return type;
 558 }
 559
 560 type_t *skip_typeref(type_t *type)
 561 {
 562         unsigned qualifiers = type->base.qualifiers;
 563
 564         while(1) {
 565                 switch(type->type) {
 566                 case TYPE_TYPEDEF: {
 567                         qualifiers |= type->base.qualifiers;
 568                         const typedef_type_t *typedef_type = &type->typedeft;
 569                         if(typedef_type->resolved_type != NULL) {
 570                                 type = typedef_type->resolved_type;
 571                                 break;
 572                         }
 573                         type = typedef_type->declaration->type;
 574                         continue;
 575                 }
 576                 case TYPE_TYPEOF: {
 577                         const typeof_type_t *typeof_type = &type->typeoft;
 578                         if(typeof_type->typeof_type != NULL) {
 579                                 type = typeof_type->typeof_type;
 580                         } else {
 581                                 type = typeof_type->expression->base.datatype;
 582                         }
 583                         continue;
 584                 }
 585                 case TYPE_BUILTIN: {
 586                         const builtin_type_t *builtin_type = &type->builtin;
 587                         type = builtin_type->real_type;
 588                         continue;
 589                 }
 590                 default:
 591                         break;
 592                 }
 593                 break;
 594         }
 595
 596         return type;
 597 }
 598
 599
 600
 601 static type_t *identify_new_type(type_t *type)
 602 {
 603         type_t *result = typehash_insert(type);
 604         if(result != type) {
 605                 obstack_free(type_obst, type);
 606         }
 607         return result;
 608 }
 609
 610 type_t *make_atomic_type(atomic_type_type_t atype, type_qualifiers_t qualifiers)
 611 {
 612         type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
 613         memset(type, 0, sizeof(atomic_type_t));
 614
 615         type->type            = TYPE_ATOMIC;
 616         type->base.qualifiers = qualifiers;
 617         type->atomic.atype    = atype;
 618
 619         return identify_new_type(type);
 620 }
 621
 622 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
 623 {
 624         type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
 625         memset(type, 0, sizeof(pointer_type_t));
 626
 627         type->type              = TYPE_POINTER;
 628         type->base.qualifiers   = qualifiers;
 629         type->pointer.points_to = points_to;
 630
 631         return identify_new_type(type);
 632 }
 633
 634 static __attribute__((unused))
 635 void dbg_type(type_t *type)
 636 {
 637         FILE *old_out = out;
 638         out = stderr;
 639         print_type(type);
 640         puts("\n");
 641         fflush(stderr);
 642         out = old_out;
 643 }