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/* Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "common/general-tree.h"
#include "common/errors.h"
MOD_TREE_DEFINE(general_tree_node, avl);
static void gen_rem_func(struct general_tree_node *n1)
{
free(n1);
}
general_tree_t *gen_tree_new(int (*comp_func)(void *, void *))
{
general_tree_t *ret = malloc(sizeof(general_tree_t));
if (ret == NULL) {
return NULL;
}
ret->tree = malloc(sizeof(general_avl_tree_t));
if (ret->tree == NULL) {
free(ret);
return NULL;
}
MOD_TREE_INIT(ret->tree, comp_func);
return ret;
}
int gen_tree_add(general_tree_t *tree,
void *node, int (*mrg_func)(void **n1, void **n2))
{
struct general_tree_node *tree_node =
malloc(sizeof(struct general_tree_node));
if (tree_node == NULL) {
return -1;
}
memset(tree_node, 0, sizeof(struct general_tree_node));
tree_node->data = node;
int merged = 0;
MOD_TREE_INSERT(tree->tree, general_tree_node, avl,
tree_node, mrg_func, &merged);
if (merged) {
free(tree_node);
}
return merged;
}
void gen_tree_remove(general_tree_t *tree,
void *what)
{
struct general_tree_node tree_node;
tree_node.data = what;
MOD_TREE_REMOVE(tree->tree, general_tree_node, avl, &tree_node,
gen_rem_func);
}
void *gen_tree_find(general_tree_t *tree,
void *what)
{
struct general_tree_node tree_node;
tree_node.data = what;
struct general_tree_node *found_node =
MOD_TREE_FIND(tree->tree, general_tree_node, avl, &tree_node);
if (found_node) {
return found_node->data;
} else {
return NULL;
}
}
int gen_tree_find_less_or_equal(general_tree_t *tree,
void *what,
void **found)
{
if (tree == NULL || tree->tree == NULL) {
return -1;
}
/* Check if tree is empty. */
if (tree->tree->th_root == NULL) {
*found = NULL;
return 0;
}
struct general_tree_node *f = NULL, *prev = NULL;
struct general_tree_node tree_node;
tree_node.data = what;
int exact_match =
MOD_TREE_FIND_LESS_EQUAL(tree->tree, general_tree_node, avl,
&tree_node, &f, &prev);
if (exact_match < 0) {
*found = NULL;
exact_match = 0;
} else if (exact_match == 0) {
assert(prev != NULL);
*found = prev->data;
} else {
assert(f != NULL);
*found = f->data;
}
// *found = (exact_match > 0) ? f->data : prev->data;
return exact_match;
}
void gen_tree_apply_inorder(general_tree_t *tree,
void (*app_func)
(void *node, void *data), void *data)
{
MOD_TREE_FORWARD_APPLY(tree->tree, general_tree_node, avl,
app_func, data);
}
void gen_tree_destroy(general_tree_t **tree,
void (*dest_func)(void *node, void *data), void *data)
{
// gen_tree_apply_inorder(*tree, print_node, NULL);
MOD_TREE_DESTROY((*tree)->tree, general_tree_node, avl, dest_func,
gen_rem_func, data);
free((*tree)->tree);
free(*tree);
*tree = NULL;
}
void gen_tree_clear(general_tree_t *tree)
{
MOD_TREE_DESTROY(tree->tree, general_tree_node, avl, NULL,
gen_rem_func, NULL);
}
//static void add_node_to_tree(void *n, void *data)
//{
// general_tree_t *tree = (general_tree_t *)data;
// gen_tree_add(tree, n, NULL);
//}
static int gen_tree_copy_node(const struct general_tree_node *from,
struct general_tree_node **to)
{
if (from == NULL) {
return 0;
}
*to = malloc(sizeof(struct general_tree_node));
if (*to == NULL) {
return -1;
}
memset(*to, 0, sizeof(struct general_tree_node));
(*to)->data = from->data;
(*to)->avl.avl_height = from->avl.avl_height;
int ret = gen_tree_copy_node(from->avl.avl_left,
&(*to)->avl.avl_left);
if (ret != 0) {
return ret;
}
ret = gen_tree_copy_node(from->avl.avl_right,
&(*to)->avl.avl_right);
if (ret != 0) {
/*! \todo Partially cleaunp tree! */
(*to)->avl.avl_left = NULL;
return ret;
}
return 0;
}
general_tree_t *gen_tree_shallow_copy(general_tree_t *tree)
{
general_tree_t *new_tree = malloc(sizeof(general_tree_t));
if (new_tree == NULL) {
return NULL;
}
new_tree->tree = malloc(sizeof(general_avl_tree_t));
if (new_tree->tree == NULL) {
free(new_tree);
return NULL;
}
MOD_TREE_INIT(new_tree->tree, tree->tree->th_cmp);
assert(new_tree->tree->th_cmp == tree->tree->th_cmp);
// gen_tree_apply_inorder(tree, add_node_to_tree, new_tree);
if (gen_tree_copy_node(tree->tree->th_root,
&new_tree->tree->th_root) != 0) {
return NULL;
}
/* CLEANUP */
// gen_tree_apply_inorder(tree, print_node, NULL);
// printf("--------------------------\n");
// gen_tree_apply_inorder(new_tree, print_node, NULL);
return new_tree;
}
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