+bool is_type_incomplete(const type_t *type)
+{
+ switch(type->type) {
+ case TYPE_COMPOUND_STRUCT:
+ case TYPE_COMPOUND_UNION: {
+ const compound_type_t *compound_type
+ = (const compound_type_t*) type;
+ declaration_t *declaration = compound_type->declaration;
+ return !declaration->init.is_defined;
+ }
+ case TYPE_FUNCTION:
+ return true;
+
+ case TYPE_ARRAY: {
+ const array_type_t *array_type = (const array_type_t*) type;
+
+ return array_type->size == NULL;
+ }
+
+ case TYPE_ATOMIC:
+ case TYPE_POINTER:
+ case TYPE_ENUM:
+ return false;
+
+ case TYPE_TYPEDEF:
+ case TYPE_TYPEOF:
+ case TYPE_BUILTIN:
+ panic("is_type_incomplete called without typerefs skipped");
+ case TYPE_INVALID:
+ break;
+ }
+
+ panic("invalid type found");
+}
+
+bool types_compatible(const type_t *type1, const type_t *type2)
+{
+ /* TODO: really incomplete */
+ if(type1 == type2)
+ return true;
+
+ if(type1->type == TYPE_ATOMIC && type2->type == TYPE_ATOMIC) {
+ const atomic_type_t *atomic1 = (const atomic_type_t*) type1;
+ const atomic_type_t *atomic2 = (const atomic_type_t*) type2;
+
+ return atomic1->atype == atomic2->atype;
+ }
+
+ return false;
+}
+
+bool pointers_compatible(const type_t *type1, const type_t *type2)
+{
+ assert(type1->type == TYPE_POINTER);
+ assert(type2->type == TYPE_POINTER);
+#if 0
+ pointer_type_t *pointer_type1 = (pointer_type_t*) type1;
+ pointer_type_t *pointer_type2 = (pointer_type_t*) type2;
+ return types_compatible(pointer_type1->points_to,
+ pointer_type2->points_to);
+#endif
+ return true;
+}
+
+static size_t get_type_size(type_t *type)
+{
+ switch(type->type) {
+ case TYPE_ATOMIC: return sizeof(atomic_type_t); break;
+ case TYPE_COMPOUND_STRUCT:
+ case TYPE_COMPOUND_UNION: return sizeof(compound_type_t); break;
+ case TYPE_ENUM: return sizeof(enum_type_t); break;
+ case TYPE_FUNCTION: return sizeof(function_type_t); break;
+ case TYPE_POINTER: return sizeof(pointer_type_t); break;
+ case TYPE_ARRAY: return sizeof(array_type_t); break;
+ case TYPE_BUILTIN: return sizeof(builtin_type_t); break;
+ case TYPE_TYPEDEF: return sizeof(typedef_type_t); break;
+ case TYPE_TYPEOF: return sizeof(typeof_type_t); break;
+ case TYPE_INVALID: panic("invalid type found"); break;
+ }
+ panic("unknown type found");
+}
+
+/**
+ * duplicates a type
+ * note that this does not produce a deep copy!
+ */
+static type_t *duplicate_type(type_t *type)
+{
+ size_t size = get_type_size(type);
+
+ type_t *copy = obstack_alloc(type_obst, size);
+ memcpy(copy, type, size);
+
+ (void) duplicate_type;
+
+ return type;
+}
+
+type_t *skip_typeref(type_t *type)
+{
+ unsigned qualifiers = type->qualifiers;
+
+ while(1) {
+ switch(type->type) {
+ case TYPE_TYPEDEF: {
+ qualifiers |= type->qualifiers;
+ const typedef_type_t *typedef_type = (const typedef_type_t*) type;
+ if(typedef_type->resolved_type != NULL) {
+ type = typedef_type->resolved_type;
+ break;
+ }
+ type = typedef_type->declaration->type;
+ continue;
+ }
+ case TYPE_TYPEOF: {
+ const typeof_type_t *typeof_type = (const typeof_type_t *) type;
+ if(typeof_type->typeof_type != NULL) {
+ type = typeof_type->typeof_type;
+ } else {
+ type = typeof_type->expression->datatype;
+ }
+ continue;
+ }
+ case TYPE_BUILTIN: {
+ const builtin_type_t *builtin_type = (const builtin_type_t*) type;
+ type = builtin_type->real_type;
+ continue;
+ }
+ default:
+ break;
+ }
+ break;
+ }
+
+ return type;
+}
+
+
+