9 static struct obstack _type_obst;
10 struct obstack *type_obst = &_type_obst;
12 static int type_visited = 0;
14 static void intern_print_type_pre(type_t *type);
15 static void intern_print_type_post(type_t *type);
19 obstack_init(type_obst);
24 obstack_free(type_obst, NULL);
27 void type_set_output(FILE *stream)
32 void inc_type_visited(void)
37 void print_type_qualifiers(type_qualifiers_t qualifiers)
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);
45 void print_atomic_type(const atomic_type_t *type)
47 print_type_qualifiers(type->type.qualifiers);
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;
73 static void print_function_type_pre(const function_type_t *type)
75 print_type_qualifiers(type->type.qualifiers);
77 intern_print_type_pre(type->return_type);
79 /* TODO: don't emit braces if we're the toplevel type... */
83 static void print_function_type_post(const function_type_t *type,
84 const context_t *context)
86 /* TODO: don't emit braces if we're the toplevel type... */
87 intern_print_type_post(type->return_type);
94 function_parameter_t *parameter = type->parameters;
95 for( ; parameter != NULL; parameter = parameter->next) {
101 print_type(parameter->type);
104 declaration_t *parameter = context->declarations;
105 for( ; parameter != NULL; parameter = parameter->next) {
111 print_type_ext(parameter->type, parameter->symbol,
112 ¶meter->context);
123 if(first && !type->unspecified_parameters) {
129 static void print_pointer_type_pre(const pointer_type_t *type)
131 intern_print_type_pre(type->points_to);
133 print_type_qualifiers(type->type.qualifiers);
136 static void print_pointer_type_post(const pointer_type_t *type)
138 intern_print_type_post(type->points_to);
141 static void print_array_type_pre(const array_type_t *type)
143 intern_print_type_pre(type->element_type);
146 static void print_array_type_post(const array_type_t *type)
149 if(type->is_static) {
150 fputs("static ", out);
152 print_type_qualifiers(type->type.qualifiers);
153 if(type->size != NULL) {
154 print_expression(type->size);
157 intern_print_type_post(type->element_type);
160 void print_enum_definition(const declaration_t *declaration)
166 declaration_t *entry = declaration->next;
167 for( ; entry != NULL && entry->storage_class == STORAGE_CLASS_ENUM_ENTRY;
168 entry = entry->next) {
171 fprintf(out, "%s", entry->symbol->string);
172 if(entry->init.initializer != NULL) {
174 print_expression(entry->init.enum_value);
184 static void print_type_enum(const enum_type_t *type)
186 print_type_qualifiers(type->type.qualifiers);
189 declaration_t *declaration = type->declaration;
190 symbol_t *symbol = declaration->symbol;
192 fputs(symbol->string, out);
194 print_enum_definition(declaration);
198 void print_compound_definition(const declaration_t *declaration)
203 declaration_t *iter = declaration->context.declarations;
204 for( ; iter != NULL; iter = iter->next) {
206 print_declaration(iter);
215 static void print_compound_type(const compound_type_t *type)
217 print_type_qualifiers(type->type.qualifiers);
219 if(type->type.type == TYPE_COMPOUND_STRUCT) {
220 fputs("struct ", out);
222 assert(type->type.type == TYPE_COMPOUND_UNION);
223 fputs("union ", out);
226 declaration_t *declaration = type->declaration;
227 symbol_t *symbol = declaration->symbol;
229 fputs(symbol->string, out);
231 print_compound_definition(declaration);
235 static void print_typedef_type_pre(typedef_type_t *type)
237 fputs(type->declaration->symbol->string, out);
240 static void print_typeof_type_pre(typeof_type_t *type)
242 fputs("typeof(", out);
243 if(type->expression != NULL) {
244 assert(type->typeof_type == NULL);
245 print_expression(type->expression);
247 print_type(type->typeof_type);
252 static void intern_print_type_pre(type_t *type)
256 fputs("invalid", out);
259 print_type_enum(&type->enumt);
262 print_atomic_type(&type->atomic);
264 case TYPE_COMPOUND_STRUCT:
265 case TYPE_COMPOUND_UNION:
266 print_compound_type(&type->compound);
269 fputs(type->builtin.symbol->string, out);
272 print_function_type_pre(&type->function);
275 print_pointer_type_pre(&type->pointer);
278 print_array_type_pre(&type->array);
281 print_typedef_type_pre(&type->typedeft);
284 print_typeof_type_pre(&type->typeoft);
287 fputs("unknown", out);
290 static void intern_print_type_post(type_t *type)
294 print_function_type_post(&type->function, NULL);
297 print_pointer_type_post(&type->pointer);
300 print_array_type_post(&type->array);
305 case TYPE_COMPOUND_STRUCT:
306 case TYPE_COMPOUND_UNION:
314 void print_type(type_t *type)
316 print_type_ext(type, NULL, NULL);
319 void print_type_ext(type_t *type, const symbol_t *symbol,
320 const context_t *context)
323 fputs("nil type", out);
327 intern_print_type_pre(type);
330 fputs(symbol->string, out);
332 if(type->type == TYPE_FUNCTION) {
333 print_function_type_post((const function_type_t*) type, context);
335 intern_print_type_post(type);
339 static size_t get_type_size(type_t *type)
342 case TYPE_ATOMIC: return sizeof(atomic_type_t);
343 case TYPE_COMPOUND_STRUCT:
344 case TYPE_COMPOUND_UNION: return sizeof(compound_type_t);
345 case TYPE_ENUM: return sizeof(enum_type_t);
346 case TYPE_FUNCTION: return sizeof(function_type_t);
347 case TYPE_POINTER: return sizeof(pointer_type_t);
348 case TYPE_ARRAY: return sizeof(array_type_t);
349 case TYPE_BUILTIN: return sizeof(builtin_type_t);
350 case TYPE_TYPEDEF: return sizeof(typedef_type_t);
351 case TYPE_TYPEOF: return sizeof(typeof_type_t);
352 case TYPE_INVALID: panic("invalid type found");
354 panic("unknown type found");
359 * note that this does not produce a deep copy!
361 type_t *duplicate_type(type_t *type)
363 size_t size = get_type_size(type);
365 type_t *copy = obstack_alloc(type_obst, size);
366 memcpy(copy, type, size);
371 type_t *get_unqualified_type(type_t *type)
373 if(type->base.qualifiers == TYPE_QUALIFIER_NONE)
376 type_t *unqualified_type = duplicate_type(type);
377 unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
379 type_t *result = typehash_insert(unqualified_type);
380 if(result != unqualified_type) {
381 obstack_free(type_obst, unqualified_type);
387 bool type_valid(const type_t *type)
389 return type->type != TYPE_INVALID;
392 bool is_type_integer(const type_t *type)
394 assert(!is_typeref(type));
396 if(type->type == TYPE_ENUM)
399 if(type->type != TYPE_ATOMIC)
402 switch(type->atomic.atype) {
403 case ATOMIC_TYPE_BOOL:
404 case ATOMIC_TYPE_CHAR:
405 case ATOMIC_TYPE_SCHAR:
406 case ATOMIC_TYPE_UCHAR:
407 case ATOMIC_TYPE_SHORT:
408 case ATOMIC_TYPE_USHORT:
409 case ATOMIC_TYPE_INT:
410 case ATOMIC_TYPE_UINT:
411 case ATOMIC_TYPE_LONG:
412 case ATOMIC_TYPE_ULONG:
413 case ATOMIC_TYPE_LONGLONG:
414 case ATOMIC_TYPE_ULONGLONG:
421 bool is_type_floating(const type_t *type)
423 assert(!is_typeref(type));
425 if(type->type != TYPE_ATOMIC)
428 switch(type->atomic.atype) {
429 case ATOMIC_TYPE_FLOAT:
430 case ATOMIC_TYPE_DOUBLE:
431 case ATOMIC_TYPE_LONG_DOUBLE:
432 #ifdef PROVIDE_COMPLEX
433 case ATOMIC_TYPE_FLOAT_COMPLEX:
434 case ATOMIC_TYPE_DOUBLE_COMPLEX:
435 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
436 case ATOMIC_TYPE_FLOAT_IMAGINARY:
437 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
438 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
446 bool is_type_signed(const type_t *type)
448 assert(!is_typeref(type));
450 /* enum types are int for now */
451 if(type->type == TYPE_ENUM)
454 if(type->type != TYPE_ATOMIC)
457 switch(type->atomic.atype) {
458 case ATOMIC_TYPE_CHAR:
459 case ATOMIC_TYPE_SCHAR:
460 case ATOMIC_TYPE_SHORT:
461 case ATOMIC_TYPE_INT:
462 case ATOMIC_TYPE_LONG:
463 case ATOMIC_TYPE_LONGLONG:
464 case ATOMIC_TYPE_FLOAT:
465 case ATOMIC_TYPE_DOUBLE:
466 case ATOMIC_TYPE_LONG_DOUBLE:
467 #ifdef PROVIDE_COMPLEX
468 case ATOMIC_TYPE_FLOAT_COMPLEX:
469 case ATOMIC_TYPE_DOUBLE_COMPLEX:
470 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
471 case ATOMIC_TYPE_FLOAT_IMAGINARY:
472 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
473 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
477 case ATOMIC_TYPE_BOOL:
478 case ATOMIC_TYPE_UCHAR:
479 case ATOMIC_TYPE_USHORT:
480 case ATOMIC_TYPE_UINT:
481 case ATOMIC_TYPE_ULONG:
482 case ATOMIC_TYPE_ULONGLONG:
485 case ATOMIC_TYPE_INVALID:
486 case ATOMIC_TYPE_VOID:
490 panic("invalid atomic type found");
494 bool is_type_arithmetic(const type_t *type)
496 assert(!is_typeref(type));
498 if(is_type_integer(type) || is_type_floating(type))
504 bool is_type_scalar(const type_t *type)
506 assert(!is_typeref(type));
508 switch (type->type) {
509 case TYPE_POINTER: return true;
510 case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
514 return is_type_arithmetic(type);
517 bool is_type_incomplete(const type_t *type)
519 assert(!is_typeref(type));
522 case TYPE_COMPOUND_STRUCT:
523 case TYPE_COMPOUND_UNION: {
524 const compound_type_t *compound_type = &type->compound;
525 declaration_t *declaration = compound_type->declaration;
526 return !declaration->init.is_defined;
532 return type->array.size == NULL;
542 panic("is_type_incomplete called without typerefs skipped");
547 panic("invalid type found");
550 static bool function_types_compatible(const function_type_t *func1,
551 const function_type_t *func2)
553 if(!types_compatible(func1->return_type, func2->return_type))
556 /* can parameters be compared? */
557 if(func1->unspecified_parameters || func2->unspecified_parameters)
560 if(func1->variadic != func2->variadic)
563 /* TODO: handling of unspecified parameters not correct yet */
565 /* all argument types must be compatible */
566 function_parameter_t *parameter1 = func1->parameters;
567 function_parameter_t *parameter2 = func2->parameters;
568 for( ; parameter1 != NULL && parameter2 != NULL;
569 parameter1 = parameter1->next, parameter2 = parameter2->next) {
570 type_t *parameter1_type = skip_typeref(parameter1->type);
571 type_t *parameter2_type = skip_typeref(parameter2->type);
573 parameter1_type = get_unqualified_type(parameter1_type);
574 parameter2_type = get_unqualified_type(parameter2_type);
576 if(!types_compatible(parameter1_type, parameter2_type))
579 /* same number of arguments? */
580 if(parameter1 != NULL || parameter2 != NULL)
586 static bool array_types_compatible(const array_type_t *array1,
587 const array_type_t *array2)
589 type_t *element_type1 = skip_typeref(array1->element_type);
590 type_t *element_type2 = skip_typeref(array2->element_type);
591 if(!types_compatible(element_type1, element_type2))
594 if(array1->size != NULL && array2->size != NULL) {
595 /* TODO: check if size expression evaulate to the same value
596 * if they are constant */
602 bool types_compatible(const type_t *type1, const type_t *type2)
604 assert(!is_typeref(type1));
605 assert(!is_typeref(type2));
607 /* shortcut: the same type is always compatible */
611 if(type1->base.qualifiers != type2->base.qualifiers)
613 if(type1->type != type2->type)
616 switch(type1->type) {
618 return function_types_compatible(&type1->function, &type2->function);
620 return type1->atomic.atype == type2->atomic.atype;
622 return array_types_compatible(&type1->array, &type2->array);
624 return types_compatible(type1->pointer.points_to,
625 type2->pointer.points_to);
626 case TYPE_COMPOUND_STRUCT:
627 case TYPE_COMPOUND_UNION:
630 /* TODO: not implemented */
634 panic("invalid type found in compatible types");
637 panic("typerefs not skipped in compatible types?!?");
640 /* TODO: incomplete */
644 bool pointers_compatible(const type_t *type1, const type_t *type2)
646 assert(!is_typeref(type1));
647 assert(!is_typeref(type2));
649 assert(type1->type == TYPE_POINTER);
650 assert(type2->type == TYPE_POINTER);
655 type_t *skip_typeref(type_t *type)
657 unsigned qualifiers = type->base.qualifiers;
662 qualifiers |= type->base.qualifiers;
663 const typedef_type_t *typedef_type = &type->typedeft;
664 if(typedef_type->resolved_type != NULL) {
665 type = typedef_type->resolved_type;
668 type = typedef_type->declaration->type;
672 const typeof_type_t *typeof_type = &type->typeoft;
673 if(typeof_type->typeof_type != NULL) {
674 type = typeof_type->typeof_type;
676 type = typeof_type->expression->base.datatype;
691 static type_t *identify_new_type(type_t *type)
693 type_t *result = typehash_insert(type);
695 obstack_free(type_obst, type);
700 type_t *make_atomic_type(atomic_type_type_t atype, type_qualifiers_t qualifiers)
702 type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
703 memset(type, 0, sizeof(atomic_type_t));
705 type->type = TYPE_ATOMIC;
706 type->base.qualifiers = qualifiers;
707 type->atomic.atype = atype;
709 return identify_new_type(type);
712 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
714 type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
715 memset(type, 0, sizeof(pointer_type_t));
717 type->type = TYPE_POINTER;
718 type->base.qualifiers = qualifiers;
719 type->pointer.points_to = points_to;
721 return identify_new_type(type);
724 static __attribute__((unused))
725 void dbg_type(type_t *type)