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(const type_t *type, bool top);
15 static void intern_print_type_post(const type_t *type, bool top);
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, bool top)
75 print_type_qualifiers(type->type.qualifiers);
77 intern_print_type_pre(type->return_type, false);
79 /* don't emit braces if we're the toplevel type... */
84 static void print_function_type_post(const function_type_t *type,
85 const context_t *context, bool top)
87 intern_print_type_post(type->return_type, false);
88 /* don't emit braces if we're the toplevel type... */
96 function_parameter_t *parameter = type->parameters;
97 for( ; parameter != NULL; parameter = parameter->next) {
103 print_type(parameter->type);
106 declaration_t *parameter = context->declarations;
107 for( ; parameter != NULL; parameter = parameter->next) {
113 print_type_ext(parameter->type, parameter->symbol,
114 ¶meter->context);
125 if(first && !type->unspecified_parameters) {
131 static void print_pointer_type_pre(const pointer_type_t *type)
133 intern_print_type_pre(type->points_to, false);
135 print_type_qualifiers(type->type.qualifiers);
138 static void print_pointer_type_post(const pointer_type_t *type)
140 intern_print_type_post(type->points_to, false);
143 static void print_array_type_pre(const array_type_t *type)
145 intern_print_type_pre(type->element_type, false);
148 static void print_array_type_post(const array_type_t *type)
151 if(type->is_static) {
152 fputs("static ", out);
154 print_type_qualifiers(type->type.qualifiers);
155 if(type->size != NULL) {
156 print_expression(type->size);
159 intern_print_type_post(type->element_type, false);
162 static void print_bitfield_type_post(const bitfield_type_t *type)
165 print_expression(type->size);
166 intern_print_type_post(type->base, false);
169 void print_enum_definition(const declaration_t *declaration)
175 declaration_t *entry = declaration->next;
176 for( ; entry != NULL && entry->storage_class == STORAGE_CLASS_ENUM_ENTRY;
177 entry = entry->next) {
180 fprintf(out, "%s", entry->symbol->string);
181 if(entry->init.initializer != NULL) {
183 print_expression(entry->init.enum_value);
193 static void print_type_enum(const enum_type_t *type)
195 print_type_qualifiers(type->type.qualifiers);
198 declaration_t *declaration = type->declaration;
199 symbol_t *symbol = declaration->symbol;
201 fputs(symbol->string, out);
203 print_enum_definition(declaration);
207 void print_compound_definition(const declaration_t *declaration)
212 declaration_t *iter = declaration->context.declarations;
213 for( ; iter != NULL; iter = iter->next) {
215 print_declaration(iter);
224 static void print_compound_type(const compound_type_t *type)
226 print_type_qualifiers(type->type.qualifiers);
228 if(type->type.kind == TYPE_COMPOUND_STRUCT) {
229 fputs("struct ", out);
231 assert(type->type.kind == TYPE_COMPOUND_UNION);
232 fputs("union ", out);
235 declaration_t *declaration = type->declaration;
236 symbol_t *symbol = declaration->symbol;
238 fputs(symbol->string, out);
240 print_compound_definition(declaration);
244 static void print_typedef_type_pre(const typedef_type_t *const type)
246 print_type_qualifiers(type->type.qualifiers);
247 fputs(type->declaration->symbol->string, out);
250 static void print_typeof_type_pre(const typeof_type_t *const type)
252 fputs("typeof(", out);
253 if(type->expression != NULL) {
254 assert(type->typeof_type == NULL);
255 print_expression(type->expression);
257 print_type(type->typeof_type);
262 static void intern_print_type_pre(const type_t *const type, const bool top)
266 fputs("<error>", out);
268 fputs("<invalid>", out);
271 print_type_enum(&type->enumt);
274 print_atomic_type(&type->atomic);
276 case TYPE_COMPOUND_STRUCT:
277 case TYPE_COMPOUND_UNION:
278 print_compound_type(&type->compound);
281 fputs(type->builtin.symbol->string, out);
284 print_function_type_pre(&type->function, top);
287 print_pointer_type_pre(&type->pointer);
290 intern_print_type_pre(type->bitfield.base, top);
293 print_array_type_pre(&type->array);
296 print_typedef_type_pre(&type->typedeft);
299 print_typeof_type_pre(&type->typeoft);
302 fputs("unknown", out);
305 static void intern_print_type_post(const type_t *const type, const bool top)
309 print_function_type_post(&type->function, NULL, top);
312 print_pointer_type_post(&type->pointer);
315 print_array_type_post(&type->array);
318 print_bitfield_type_post(&type->bitfield);
324 case TYPE_COMPOUND_STRUCT:
325 case TYPE_COMPOUND_UNION:
333 void print_type(const type_t *const type)
335 print_type_ext(type, NULL, NULL);
338 void print_type_ext(const type_t *const type, const symbol_t *symbol,
339 const context_t *context)
342 fputs("nil type", out);
346 intern_print_type_pre(type, true);
349 fputs(symbol->string, out);
351 if(type->kind == TYPE_FUNCTION) {
352 print_function_type_post(&type->function, context, true);
354 intern_print_type_post(type, true);
358 static size_t get_type_size(type_t *type)
361 case TYPE_ATOMIC: return sizeof(atomic_type_t);
362 case TYPE_COMPOUND_STRUCT:
363 case TYPE_COMPOUND_UNION: return sizeof(compound_type_t);
364 case TYPE_ENUM: return sizeof(enum_type_t);
365 case TYPE_FUNCTION: return sizeof(function_type_t);
366 case TYPE_POINTER: return sizeof(pointer_type_t);
367 case TYPE_ARRAY: return sizeof(array_type_t);
368 case TYPE_BUILTIN: return sizeof(builtin_type_t);
369 case TYPE_TYPEDEF: return sizeof(typedef_type_t);
370 case TYPE_TYPEOF: return sizeof(typeof_type_t);
371 case TYPE_BITFIELD: return sizeof(bitfield_type_t);
372 case TYPE_ERROR: panic("error type found");
373 case TYPE_INVALID: panic("invalid type found");
375 panic("unknown type found");
380 * note that this does not produce a deep copy!
382 type_t *duplicate_type(type_t *type)
384 size_t size = get_type_size(type);
386 type_t *copy = obstack_alloc(type_obst, size);
387 memcpy(copy, type, size);
392 type_t *get_unqualified_type(type_t *type)
394 if(type->base.qualifiers == TYPE_QUALIFIER_NONE)
397 type_t *unqualified_type = duplicate_type(type);
398 unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
400 type_t *result = typehash_insert(unqualified_type);
401 if(result != unqualified_type) {
402 obstack_free(type_obst, unqualified_type);
408 bool type_valid(const type_t *type)
410 return type->kind != TYPE_INVALID;
413 bool is_type_integer(const type_t *type)
415 assert(!is_typeref(type));
417 if(type->kind == TYPE_ENUM)
420 if(type->kind != TYPE_ATOMIC)
423 switch(type->atomic.akind) {
424 case ATOMIC_TYPE_BOOL:
425 case ATOMIC_TYPE_CHAR:
426 case ATOMIC_TYPE_SCHAR:
427 case ATOMIC_TYPE_UCHAR:
428 case ATOMIC_TYPE_SHORT:
429 case ATOMIC_TYPE_USHORT:
430 case ATOMIC_TYPE_INT:
431 case ATOMIC_TYPE_UINT:
432 case ATOMIC_TYPE_LONG:
433 case ATOMIC_TYPE_ULONG:
434 case ATOMIC_TYPE_LONGLONG:
435 case ATOMIC_TYPE_ULONGLONG:
442 bool is_type_floating(const type_t *type)
444 assert(!is_typeref(type));
446 if(type->kind != TYPE_ATOMIC)
449 switch(type->atomic.akind) {
450 case ATOMIC_TYPE_FLOAT:
451 case ATOMIC_TYPE_DOUBLE:
452 case ATOMIC_TYPE_LONG_DOUBLE:
453 #ifdef PROVIDE_COMPLEX
454 case ATOMIC_TYPE_FLOAT_COMPLEX:
455 case ATOMIC_TYPE_DOUBLE_COMPLEX:
456 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
457 case ATOMIC_TYPE_FLOAT_IMAGINARY:
458 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
459 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
467 bool is_type_signed(const type_t *type)
469 assert(!is_typeref(type));
471 /* enum types are int for now */
472 if(type->kind == TYPE_ENUM)
475 if(type->kind != TYPE_ATOMIC)
478 switch(type->atomic.akind) {
479 case ATOMIC_TYPE_CHAR:
480 case ATOMIC_TYPE_SCHAR:
481 case ATOMIC_TYPE_SHORT:
482 case ATOMIC_TYPE_INT:
483 case ATOMIC_TYPE_LONG:
484 case ATOMIC_TYPE_LONGLONG:
485 case ATOMIC_TYPE_FLOAT:
486 case ATOMIC_TYPE_DOUBLE:
487 case ATOMIC_TYPE_LONG_DOUBLE:
488 #ifdef PROVIDE_COMPLEX
489 case ATOMIC_TYPE_FLOAT_COMPLEX:
490 case ATOMIC_TYPE_DOUBLE_COMPLEX:
491 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
492 case ATOMIC_TYPE_FLOAT_IMAGINARY:
493 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
494 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
498 case ATOMIC_TYPE_BOOL:
499 case ATOMIC_TYPE_UCHAR:
500 case ATOMIC_TYPE_USHORT:
501 case ATOMIC_TYPE_UINT:
502 case ATOMIC_TYPE_ULONG:
503 case ATOMIC_TYPE_ULONGLONG:
506 case ATOMIC_TYPE_VOID:
507 case ATOMIC_TYPE_INVALID:
508 case ATOMIC_TYPE_LAST:
512 panic("invalid atomic type found");
516 bool is_type_arithmetic(const type_t *type)
518 assert(!is_typeref(type));
520 if(type->kind == TYPE_BITFIELD)
523 if(is_type_integer(type) || is_type_floating(type))
529 bool is_type_scalar(const type_t *type)
531 assert(!is_typeref(type));
533 switch (type->kind) {
534 case TYPE_POINTER: return true;
535 case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
539 return is_type_arithmetic(type);
543 * Check if a given type is incomplete
545 bool is_type_incomplete(const type_t *type)
547 assert(!is_typeref(type));
550 case TYPE_COMPOUND_STRUCT:
551 case TYPE_COMPOUND_UNION: {
552 const compound_type_t *compound_type = &type->compound;
553 declaration_t *declaration = compound_type->declaration;
554 return !declaration->init.is_defined;
557 const enum_type_t *enum_type = &type->enumt;
558 declaration_t *declaration = enum_type->declaration;
559 return !declaration->init.is_defined;
566 return type->array.size == NULL;
569 return type->atomic.akind == ATOMIC_TYPE_VOID;
578 panic("is_type_incomplete called without typerefs skipped");
583 panic("invalid type found");
586 static bool function_types_compatible(const function_type_t *func1,
587 const function_type_t *func2)
589 const type_t* const ret1 = skip_typeref(func1->return_type);
590 const type_t* const ret2 = skip_typeref(func2->return_type);
591 if (!types_compatible(ret1, ret2))
594 /* can parameters be compared? */
595 if(func1->unspecified_parameters || func2->unspecified_parameters)
598 if(func1->variadic != func2->variadic)
601 /* TODO: handling of unspecified parameters not correct yet */
603 /* all argument types must be compatible */
604 function_parameter_t *parameter1 = func1->parameters;
605 function_parameter_t *parameter2 = func2->parameters;
606 for( ; parameter1 != NULL && parameter2 != NULL;
607 parameter1 = parameter1->next, parameter2 = parameter2->next) {
608 type_t *parameter1_type = skip_typeref(parameter1->type);
609 type_t *parameter2_type = skip_typeref(parameter2->type);
611 parameter1_type = get_unqualified_type(parameter1_type);
612 parameter2_type = get_unqualified_type(parameter2_type);
614 if(!types_compatible(parameter1_type, parameter2_type))
617 /* same number of arguments? */
618 if(parameter1 != NULL || parameter2 != NULL)
624 static bool array_types_compatible(const array_type_t *array1,
625 const array_type_t *array2)
627 type_t *element_type1 = skip_typeref(array1->element_type);
628 type_t *element_type2 = skip_typeref(array2->element_type);
629 if(!types_compatible(element_type1, element_type2))
632 if(array1->size != NULL && array2->size != NULL) {
633 /* TODO: check if size expression evaluate to the same value
634 * if they are constant */
640 bool types_compatible(const type_t *type1, const type_t *type2)
642 assert(!is_typeref(type1));
643 assert(!is_typeref(type2));
645 /* shortcut: the same type is always compatible */
649 if(type1->base.qualifiers != type2->base.qualifiers)
651 if(type1->kind != type2->kind)
654 switch(type1->kind) {
656 return function_types_compatible(&type1->function, &type2->function);
658 return type1->atomic.akind == type2->atomic.akind;
660 return array_types_compatible(&type1->array, &type2->array);
663 const type_t *const to1 = skip_typeref(type1->pointer.points_to);
664 const type_t *const to2 = skip_typeref(type2->pointer.points_to);
665 return types_compatible(to1, to2);
668 case TYPE_COMPOUND_STRUCT:
669 case TYPE_COMPOUND_UNION:
672 /* TODO: not implemented */
676 /* not sure if this makes sense or is even needed, implement it if you
678 panic("type compatibility check for bitfield type");
681 /* Hmm, the error type should be compatible to all other types */
684 panic("invalid type found in compatible types");
687 panic("typerefs not skipped in compatible types?!?");
690 /* TODO: incomplete */
694 bool pointers_compatible(const type_t *type1, const type_t *type2)
696 assert(!is_typeref(type1));
697 assert(!is_typeref(type2));
699 assert(type1->kind == TYPE_POINTER);
700 assert(type2->kind == TYPE_POINTER);
706 * Skip all typerefs and return the underlying type.
708 type_t *skip_typeref(type_t *type)
710 unsigned qualifiers = TYPE_QUALIFIER_NONE;
717 qualifiers |= type->base.qualifiers;
718 const typedef_type_t *typedef_type = &type->typedeft;
719 if(typedef_type->resolved_type != NULL) {
720 type = typedef_type->resolved_type;
723 type = typedef_type->declaration->type;
727 const typeof_type_t *typeof_type = &type->typeoft;
728 if(typeof_type->typeof_type != NULL) {
729 type = typeof_type->typeof_type;
731 type = typeof_type->expression->base.datatype;
741 if (qualifiers != TYPE_QUALIFIER_NONE) {
742 type_t *const copy = duplicate_type(type);
743 copy->base.qualifiers |= qualifiers;
745 type = typehash_insert(copy);
747 obstack_free(type_obst, copy);
756 static type_t *identify_new_type(type_t *type)
758 type_t *result = typehash_insert(type);
760 obstack_free(type_obst, type);
765 type_t *make_atomic_type(atomic_type_kind_t atype, type_qualifiers_t qualifiers)
767 type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
768 memset(type, 0, sizeof(atomic_type_t));
770 type->kind = TYPE_ATOMIC;
771 type->base.qualifiers = qualifiers;
772 type->atomic.akind = atype;
774 return identify_new_type(type);
777 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
779 type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
780 memset(type, 0, sizeof(pointer_type_t));
782 type->kind = TYPE_POINTER;
783 type->base.qualifiers = qualifiers;
784 type->pointer.points_to = points_to;
786 return identify_new_type(type);
789 static __attribute__((unused))
790 void dbg_type(type_t *type)