+/** Return the peculiarity of an entity. */
+peculiarity get_entity_peculiarity (entity *ent);
+
+/** Sets the peculiarity of an entity. */
+void set_entity_peculiarity (entity *ent, peculiarity pec);
+
+/** Return the name of the peculiarity. */
+const char *get_peculiarity_name(peculiarity var);
+
+/* -- Representation of constant values of entites -- */
+/** Returns true if the the node is representable as code on
+ * const_code_irg. */
+int is_irn_const_expression(ir_node *n);
+/* Set current_ir_graph to get_const_code_irg() to generate a constant
+ expression. */
+/* Copies a firm subgraph that complies to the restrictions for
+ constant expressions to current_block in current_ir_graph. */
+ir_node *copy_const_value(ir_node *n);
+
+/* Set has no effect for existent entities of type method. */
+ir_node *get_atomic_ent_value(entity *ent);
+void set_atomic_ent_value(entity *ent, ir_node *val);
+
+/* The following type describes a path to a leave in the compound graph.
+ Node 0 in the path must be an entity of type tp given in the constructor. If
+ the type of this element is compound, the path node 1 is an element of the type
+ of node 0 an so forth, until an entity of atomic type is reached. */
+#ifndef _COMPOUND_GRAPH_PATH_TYPEDEF_
+#define _COMPOUND_GRAPH_PATH_TYPEDEF_
+typedef struct compound_graph_path compound_graph_path;
+#endif /* _COMPOUND_GRAPH_PATH_TYPEDEF_ */
+compound_graph_path *new_compound_graph_path(type *tp, int length);
+int is_compound_graph_path(void *thing);
+void free_compound_graph_path (compound_graph_path *gr);
+int get_compound_graph_path_length(compound_graph_path *gr);
+entity *get_compound_graph_path_node(compound_graph_path *gr, int pos);
+void set_compound_graph_path_node(compound_graph_path *gr, int pos, entity *node);
+
+/* A value of a compound entity is a pair of a value and the description of the
+ corresponding access path to the member of the compound. */
+void add_compound_ent_value_w_path(entity *ent, ir_node *val, compound_graph_path *path);
+void set_compound_ent_value_w_path(entity *ent, ir_node *val, compound_graph_path *path, int pos);
+int get_compound_ent_n_values(entity *ent);
+ir_node *get_compound_ent_value(entity *ent, int pos);
+compound_graph_path *get_compound_ent_value_path(entity *ent, int pos);
+/* Removes all constant entries where the path ends at value_ent. Does not
+ free the memory of the paths. (The same path might be used for several
+ constant entities. */
+void remove_compound_ent_value(entity *ent, entity *value_ent);
+
+/* Some languages support only trivial access paths, i.e., the member is a
+ direct, atomic member of the constant entities type. In this case the
+ corresponding entity can be accessed directly. The following functions
+ allow direct access. */
+/* generates a Path with length 1 */
+void add_compound_ent_value(entity *ent, ir_node *val, entity *member);
+/* Returns the last member in the path */
+entity *get_compound_ent_value_member(entity *ent, int pos);
+/* Sets the path at pos 0 */
+void set_compound_ent_value(entity *ent, ir_node *val, entity *member, int pos);
+
+
+
+/** Inits the entity ent witch must be of a one dimensional
+ array type with the values given in the values array.
+ The array must have a lower and an upper bound. Keeps the
+ order of values. Does not test whether the number of values
+ fits into the given array size. Does not test whether the
+ values have the proper mode for the array. */
+void set_array_entity_values(entity *ent, tarval **values, int num_vals);
+
+/* --- Fields of entities with a class type as owner --- */
+/* Overwrites is a field that specifies that an access to the overwritten
+ entity in the supertype must use this entity. It's a list as with
+ multiple inheritance several enitites can be overwritten. This field
+ is mostly useful for method entities.
+ If a Sel node selects an entity that is overwritten by other entities it
+ must return a pointer to the entity of the dynamic type of the pointer
+ that is passed to it. Lowering of the Sel node must assure this.
+ Overwrittenby is the inverse of overwrites. Both add routines add
+ both relations, they only differ in the order of arguments. */
+void add_entity_overwrites (entity *ent, entity *overwritten);
+int get_entity_n_overwrites (entity *ent);
+int get_entity_overwrites_index(entity *ent, entity *overwritten);
+entity *get_entity_overwrites (entity *ent, int pos);
+void set_entity_overwrites (entity *ent, int pos, entity *overwritten);
+void remove_entity_overwrites(entity *ent, entity *overwritten);
+
+void add_entity_overwrittenby (entity *ent, entity *overwrites);
+int get_entity_n_overwrittenby (entity *ent);
+int get_entity_overwrittenby_index(entity *ent, entity *overwrites);
+entity *get_entity_overwrittenby (entity *ent, int pos);
+void set_entity_overwrittenby (entity *ent, int pos, entity *overwrites);
+void remove_entity_overwrittenby(entity *ent, entity *overwrites);
+
+/**
+ * Checks whether a pointer points to an entity.
+ *
+ * @param thing an arbitrary pointer
+ *
+ * @return
+ * true if the thing is an entity, else false
+ */
+int is_entity (void *thing);
+
+/** Returns true if the type of the entity is a primitive, pointer
+ enumeration or method type. */
+int is_atomic_entity(entity *ent);
+/** Returns true if the type of the entity is a class, structure,
+ array or union type. */
+int is_compound_entity(entity *ent);
+
+/** Returns true if ent1 and ent2 have are equal except for their owner.
+ Two entities are equal if
+ - they have the same type (the same C-struct)
+ - ...?
+*/
+bool equal_entity(entity *ent1, entity *ent2);
+
+
+/** Outputs a unique number for this entity if libfirm is compiled for
+ debugging, (configure with --enable-debug) else returns 0. */
+long get_entity_nr(entity *ent);
+
+/** Returns the entitys visited count. */
+unsigned long get_entity_visited(entity *ent);
+
+/** Sets the entitys visited count. */
+void set_entity_visited(entity *ent, unsigned long num);
+
+/** Sets visited field in entity to entity_visited. */
+void mark_entity_visited(entity *ent);
+
+/** Returns true if this entity was visited. */
+bool entity_visited(entity *ent);
+
+/** Returns true if this entity was not visited. */
+bool entity_not_visited(entity *ent);
+
+/** Returns the dynamically referenced entity if the static entity and the
+ * dynamic type are given. */
+entity *resolve_ent_polymorphy(type *dynamic_class, entity* static_ent);
+
+
+/*-----------------------------------------------------------------*/
+/* Debug aides */
+/*-----------------------------------------------------------------*/
+
+
+/** Write the entity and all its attributes to stdout.
+ *
+ * Writes the entity and all its attributes to stdout if DEBUG_libfirm
+ * is set. Else does nothing. */
+void dump_entity (entity *ent);
+