struct obstack *type_obst = &_type_obst;
static FILE *out;
static int type_visited = 0;
-static bool print_compound_entries;
static void intern_print_type_pre(type_t *type);
static void intern_print_type_post(type_t *type);
out = stream;
}
-void set_print_compound_entries(bool enabled)
-{
- print_compound_entries = enabled;
-}
-
void inc_type_visited(void)
{
type_visited++;
{
print_type_qualifiers(type->type.qualifiers);
- intern_print_type_pre(type->result_type);
+ intern_print_type_pre(type->return_type);
/* TODO: don't emit braces if we're the toplevel type... */
fputc('(', out);
const context_t *context)
{
/* TODO: don't emit braces if we're the toplevel type... */
- intern_print_type_post(type->result_type);
+ intern_print_type_post(type->return_type);
fputc(')', out);
fputc('(', out);
static void intern_print_type_pre(type_t *type)
{
switch(type->type) {
- case TYPE_COUNT:
case TYPE_INVALID:
fputs("invalid", out);
return;
print_array_type_post(&type->array);
return;
case TYPE_INVALID:
- case TYPE_COUNT:
case TYPE_ATOMIC:
case TYPE_ENUM:
case TYPE_COMPOUND_STRUCT:
}
}
+static size_t get_type_size(type_t *type)
+{
+ switch(type->type) {
+ case TYPE_ATOMIC: return sizeof(atomic_type_t);
+ case TYPE_COMPOUND_STRUCT:
+ case TYPE_COMPOUND_UNION: return sizeof(compound_type_t);
+ case TYPE_ENUM: return sizeof(enum_type_t);
+ case TYPE_FUNCTION: return sizeof(function_type_t);
+ case TYPE_POINTER: return sizeof(pointer_type_t);
+ case TYPE_ARRAY: return sizeof(array_type_t);
+ case TYPE_BUILTIN: return sizeof(builtin_type_t);
+ case TYPE_TYPEDEF: return sizeof(typedef_type_t);
+ case TYPE_TYPEOF: return sizeof(typeof_type_t);
+ case TYPE_INVALID: panic("invalid type found");
+ }
+ panic("unknown type found");
+}
+
+/**
+ * duplicates a type
+ * note that this does not produce a deep copy!
+ */
+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);
+
+ return copy;
+}
+
+type_t *get_unqualified_type(type_t *type)
+{
+ if(type->base.qualifiers == TYPE_QUALIFIER_NONE)
+ return type;
+
+ type_t *unqualified_type = duplicate_type(type);
+ unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
+
+ type_t *result = typehash_insert(unqualified_type);
+ if(result != unqualified_type) {
+ obstack_free(type_obst, unqualified_type);
+ }
+
+ return result;
+}
+
bool type_valid(const type_t *type)
{
return type->type != TYPE_INVALID;
assert(!is_typeref(type));
if(is_type_integer(type) || is_type_floating(type))
- return 1;
+ return true;
- return 0;
+ return false;
}
bool is_type_scalar(const type_t *type)
{
assert(!is_typeref(type));
- if(type->type == TYPE_POINTER)
- return 1;
+ switch (type->type) {
+ case TYPE_POINTER: return true;
+ case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
+ default: break;
+ }
return is_type_arithmetic(type);
}
case TYPE_ATOMIC:
case TYPE_POINTER:
case TYPE_ENUM:
+ case TYPE_BUILTIN:
return false;
case TYPE_TYPEDEF:
case TYPE_TYPEOF:
- case TYPE_BUILTIN:
panic("is_type_incomplete called without typerefs skipped");
- case TYPE_COUNT:
case TYPE_INVALID:
break;
}
panic("invalid type found");
}
+static bool function_types_compatible(const function_type_t *func1,
+ const function_type_t *func2)
+{
+ if(!types_compatible(func1->return_type, func2->return_type))
+ return false;
+
+ /* can parameters be compared? */
+ if(func1->unspecified_parameters || func2->unspecified_parameters)
+ return true;
+
+ if(func1->variadic != func2->variadic)
+ return false;
+
+ /* TODO: handling of unspecified parameters not correct yet */
+
+ /* all argument types must be compatible */
+ function_parameter_t *parameter1 = func1->parameters;
+ function_parameter_t *parameter2 = func2->parameters;
+ for( ; parameter1 != NULL && parameter2 != NULL;
+ parameter1 = parameter1->next, parameter2 = parameter2->next) {
+ type_t *parameter1_type = skip_typeref(parameter1->type);
+ type_t *parameter2_type = skip_typeref(parameter2->type);
+
+ parameter1_type = get_unqualified_type(parameter1_type);
+ parameter2_type = get_unqualified_type(parameter2_type);
+
+ if(!types_compatible(parameter1_type, parameter2_type))
+ return false;
+ }
+ /* same number of arguments? */
+ if(parameter1 != NULL || parameter2 != NULL)
+ return false;
+
+ return true;
+}
+
+static bool array_types_compatible(const array_type_t *array1,
+ const array_type_t *array2)
+{
+ type_t *element_type1 = skip_typeref(array1->element_type);
+ type_t *element_type2 = skip_typeref(array2->element_type);
+ if(!types_compatible(element_type1, element_type2))
+ return false;
+
+ if(array1->size != NULL && array2->size != NULL) {
+ /* TODO: check if size expression evaulate to the same value
+ * if they are constant */
+ }
+
+ return true;
+}
+
bool types_compatible(const type_t *type1, const type_t *type2)
{
assert(!is_typeref(type1));
assert(!is_typeref(type2));
- /* TODO: really incomplete */
+ /* shortcut: the same type is always compatible */
if(type1 == type2)
return true;
- if(type1->type == TYPE_ATOMIC && type2->type == TYPE_ATOMIC) {
+ if(type1->base.qualifiers != type2->base.qualifiers)
+ return false;
+ if(type1->type != type2->type)
+ return false;
+
+ switch(type1->type) {
+ case TYPE_FUNCTION:
+ return function_types_compatible(&type1->function, &type2->function);
+ case TYPE_ATOMIC:
return type1->atomic.atype == type2->atomic.atype;
+ case TYPE_ARRAY:
+ return array_types_compatible(&type1->array, &type2->array);
+ case TYPE_POINTER:
+ return types_compatible(type1->pointer.points_to,
+ type2->pointer.points_to);
+ case TYPE_COMPOUND_STRUCT:
+ case TYPE_COMPOUND_UNION:
+ case TYPE_ENUM:
+ case TYPE_BUILTIN:
+ /* TODO: not implemented */
+ break;
+
+ case TYPE_INVALID:
+ panic("invalid type found in compatible types");
+ case TYPE_TYPEDEF:
+ case TYPE_TYPEOF:
+ panic("typerefs not skipped in compatible types?!?");
}
+ /* TODO: incomplete */
return false;
}
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_COUNT:
- 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->base.qualifiers;
}
continue;
}
- case TYPE_BUILTIN: {
- const builtin_type_t *builtin_type = &type->builtin;
- type = builtin_type->real_type;
- continue;
- }
default:
break;
}
projects / cparser / blobdiff