--- /dev/null
+++ Libc/Libc-498/include/search.h
@@ -0,0 +1,66 @@
+/*-
+ * Written by J.T. Conklin <jtc@netbsd.org>
+ * Public domain.
+ *
+ *	$NetBSD: search.h,v 1.12 1999/02/22 10:34:28 christos Exp $
+ * $FreeBSD: src/include/search.h,v 1.10 2002/10/16 14:29:23 robert Exp $
+ */
+
+#ifndef _SEARCH_H_
+#define _SEARCH_H_
+
+#include <sys/cdefs.h>
+#include <_types.h>
+
+#ifndef _SIZE_T
+#define _SIZE_T
+typedef __darwin_size_t	size_t;
+#endif
+
+typedef	struct entry {
+	char	*key;
+	void	*data;
+} ENTRY;
+
+typedef	enum {
+	FIND, ENTER
+} ACTION;
+
+typedef	enum {
+	preorder,
+	postorder,
+	endorder,
+	leaf
+} VISIT;
+
+#ifdef _SEARCH_PRIVATE
+typedef	struct node {
+	char         *key;
+	struct node  *llink, *rlink;
+} node_t;
+
+struct que_elem {
+	struct que_elem *next;
+	struct que_elem *prev;
+};
+#endif
+
+__BEGIN_DECLS
+int	 hcreate(size_t);
+void	 hdestroy(void);
+ENTRY	*hsearch(ENTRY, ACTION);
+void	 insque(void *, void *);
+void	*lfind(const void *, const void *, size_t *, size_t,
+	    int (*)(const void *, const void *));
+void	*lsearch(const void *, void *, size_t *, size_t,
+	    int (*)(const void *, const void *));
+void	 remque(void *);
+void	*tdelete(const void * __restrict, void ** __restrict,
+	    int (*)(const void *, const void *));
+void	*tfind(const void *, void * const *,
+	    int (*)(const void *, const void *));
+void	*tsearch(const void *, void **, int (*)(const void *, const void *));
+void	 twalk(const void *, void (*)(const void *, VISIT, int));
+__END_DECLS
+
+#endif /* !_SEARCH_H_ */