-const char *unit_type_to_string(UnitType i) _const_;
-UnitType unit_type_from_string(const char *s) _pure_;
+typedef enum UnitNameFlags {
+ UNIT_NAME_PLAIN = 1, /* Allow foo.service */
+ UNIT_NAME_INSTANCE = 2, /* Allow foo@bar.service */
+ UNIT_NAME_TEMPLATE = 4, /* Allow foo@.service */
+ UNIT_NAME_ANY = UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE|UNIT_NAME_TEMPLATE,
+} UnitNameFlags;
+
+bool unit_name_is_valid(const char *n, UnitNameFlags flags) _pure_;
+bool unit_prefix_is_valid(const char *p) _pure_;
+bool unit_instance_is_valid(const char *i) _pure_;
+bool unit_suffix_is_valid(const char *s) _pure_;