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/*      $NetBSD: tdelete.c,v 1.2 1999/09/16 11:45:37 lukem Exp $        */

/*

 * Tree search generalized from Knuth (6.2.2) Algorithm T just like

 * the AT&T man page says.

 *

 * The node_t structure is for internal use only, lint doesn't grok it.

 *

 * Written by reading the System V Interface Definition, not the code.

 *

 * Totally public domain.

 */

#include <sys/cdefs.h>

#if 0

#if defined(LIBC_SCCS) && !defined(lint)

__RCSID("$NetBSD: tdelete.c,v 1.2 1999/09/16 11:45:37 lukem Exp $");

#endif /* LIBC_SCCS and not lint */

#endif

#include <assert.h>

#define _SEARCH_PRIVATE

#include <search.h>

#include <stdlib.h>

/* Walk the nodes of a tree */

static void

trecurse(root, free_action)

        node_t *root;   /* Root of the tree to be walked */

        void (*free_action)(void *);

{

  if (root->llink != NULL)

    trecurse(root->llink, free_action);

  if (root->rlink != NULL)

    trecurse(root->rlink, free_action);

  (*free_action) ((void *) root->key);

  free(root);

}

void

_DEFUN(tdestroy, (vrootp, freefct),

       void *vrootp _AND

       void (*freefct)(void *))

{

  node_t *root = (node_t *) vrootp;

  if (root != NULL)

    trecurse(root, freefct);

}