--- /dev/null
+/** @file list.h
+ * @brief Singly and doubly linked list manipulation interface.
+ * @version $Id$
+ */
+#ifndef INCLUDED_list_h
+#define INCLUDED_list_h
+#ifndef INCLUDED_sys_types_h
+#include <sys/types.h> /* time_t, size_t */
+#define INCLUDED_sys_types_h
+#endif
+
+struct Client;
+struct Connection;
+struct Channel;
+struct ConfItem;
+
+/*
+ * Structures
+ */
+
+/** Node in a singly linked list. */
+struct SLink {
+ struct SLink *next; /**< Next element in list. */
+ union {
+ struct Client *cptr; /**< List element as a client. */
+ struct Channel *chptr; /**< List element as a channel. */
+ struct ConfItem *aconf; /**< List element as a configuration item. */
+ char *cp; /**< List element as a string. */
+ } value; /**< Value of list element. */
+ unsigned int flags; /**< Modifier flags for list element. */
+};
+
+/** Node in a doubly linked list. */
+struct DLink {
+ struct DLink* next; /**< Next element in list. */
+ struct DLink* prev; /**< Previous element in list. */
+ union {
+ struct Client* cptr; /**< List element as a client. */
+ struct Channel* chptr; /**< List element as a channel. */
+ char* ch; /**< List element as a string. */
+ } value; /**< Value of list element. */
+};
+
+/*
+ * Proto types
+ */
+
+extern void free_link(struct SLink *lp);
+extern struct SLink *make_link(void);
+extern void init_list(void);
+extern struct Client *make_client(struct Client *from, int status);
+extern void free_connection(struct Connection *con);
+extern void free_client(struct Client *cptr);
+extern struct Server *make_server(struct Client *cptr);
+extern void remove_client_from_list(struct Client *cptr);
+extern void add_client_to_list(struct Client *cptr);
+extern struct DLink *add_dlink(struct DLink **lpp, struct Client *cp);
+extern void remove_dlink(struct DLink **lpp, struct DLink *lp);
+extern struct ConfItem *make_conf(int type);
+extern void free_conf(struct ConfItem *aconf);
+extern void send_listinfo(struct Client *cptr, char *name);
+
+#endif /* INCLUDED_list_h */