+bool is_type_signed(const type_t *type);
+
+/**
+ * returns true if type contains floating point numbers
+ */
+bool is_type_float(const type_t *type);
+
+/**
+ * returns true if type contains complex numbers
+ */
+bool is_type_complex(const type_t *type);
+
+bool is_type_real(const type_t *type);
+
+/**
+ * returns true if the type is valid. A type is valid if it contains no
+ * unresolved references anymore and is not of TYPE_INVALID.
+ */
+bool type_valid(const type_t *type);
+
+/**
+ * returns true if the type is an arithmetic type (§6.2.5 clause 18)
+ */
+bool is_type_arithmetic(const type_t *type);
+
+/**
+ * returns true if the type is a scalar type (§6.2.5 clause 21)
+ */
+bool is_type_scalar(const type_t *type);
+
+bool is_type_incomplete(const type_t *type);
+
+bool is_type_object(const type_t *type);
+
+/**
+ * returns true if teh type is the builtin va_list type.
+ */
+bool is_builtin_va_list(type_t *type);
+
+bool types_compatible(const type_t *type1, const type_t *type2);
+
+type_t *get_unqualified_type(type_t *type);
+type_t *get_qualified_type(type_t*, type_qualifiers_t);
+type_t *skip_typeref(type_t *type);
+
+/**
+ * Return the type qualifier set of a type. If skip_array_type
+ * is true, skip all array types.
+ */
+type_qualifiers_t get_type_qualifier(const type_t *type, bool skip_array_type);
+
+/**
+ * returns size of an atomic type kind in bytes
+ */
+unsigned get_atomic_type_size(atomic_type_kind_t kind);
+
+/**
+ * returns alignment of an atomic type kind in bytes
+ */
+unsigned get_atomic_type_alignment(atomic_type_kind_t kind);
+
+unsigned get_type_alignment(type_t *type);
+unsigned get_type_size(type_t *type);
+decl_modifiers_t get_type_modifiers(const type_t *type);
+
+/**
+ * returns flags of an atomic type kind
+ */
+unsigned get_atomic_type_flags(atomic_type_kind_t kind);
+
+atomic_type_kind_t get_intptr_kind(void);
+atomic_type_kind_t get_uintptr_kind(void);
+
+/**
+ * Find the atomic type kind representing a given size (signed).
+ */
+atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size);
+
+/**
+ * Find the atomic type kind representing a given size (unsigned).
+ */
+atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size);
+
+const char *get_atomic_kind_name(atomic_type_kind_t kind);
+
+void layout_struct_type(compound_type_t *type);
+void layout_union_type(compound_type_t *type);