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+/*-
+ * Copyright (c) 1991, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)extern.h 8.4 (Berkeley) 6/16/94
+ */
+
+BUFHEAD *__add_ovflpage __P((HTAB *, BUFHEAD *));
+int __addel __P((HTAB *, BUFHEAD *, const DBT *, const DBT *));
+int __big_delete __P((HTAB *, BUFHEAD *));
+int __big_insert __P((HTAB *, BUFHEAD *, const DBT *, const DBT *));
+int __big_keydata __P((HTAB *, BUFHEAD *, DBT *, DBT *, int));
+int __big_return __P((HTAB *, BUFHEAD *, int, DBT *, int));
+int __big_split __P((HTAB *, BUFHEAD *, BUFHEAD *, BUFHEAD *,
+ int, u_int32_t, SPLIT_RETURN *));
+int __buf_free __P((HTAB *, int, int));
+void __buf_init __P((HTAB *, int));
+u_int32_t __call_hash __P((HTAB *, char *, int));
+int __delpair __P((HTAB *, BUFHEAD *, int));
+int __expand_table __P((HTAB *));
+int __find_bigpair __P((HTAB *, BUFHEAD *, int, char *, int));
+u_int16_t __find_last_page __P((HTAB *, BUFHEAD **));
+void __free_ovflpage __P((HTAB *, BUFHEAD *));
+BUFHEAD *__get_buf __P((HTAB *, u_int32_t, BUFHEAD *, int));
+int __get_page __P((HTAB *, char *, u_int32_t, int, int, int));
+int __ibitmap __P((HTAB *, int, int, int));
+u_int32_t __hash_log2 __P((u_int32_t));
+int __put_page __P((HTAB *, char *, u_int32_t, int, int));
+void __reclaim_buf __P((HTAB *, BUFHEAD *));
+int __split_page __P((HTAB *, u_int32_t, u_int32_t));
+
+/* Default hash routine. */
+extern u_int32_t (*__default_hash) __P((const void *, size_t));
+
+#ifdef HASH_STATISTICS
+extern int hash_accesses, hash_collisions, hash_expansions, hash_overflows;
+#endif