0,0 → 1,286 |
/* |
* Copyright (c) 2007 Vojtech Mencl |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - 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. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. |
*/ |
|
#include <test.h> |
#include <print.h> |
#include <adt/avl.h> |
#include <debug.h> |
#include <arch/types.h> |
|
#define NODE_COUNT 100 |
|
static avltree_t avltree; |
|
/* |
* avl tree nodes in array for faster allocation |
*/ |
static avltree_node_t avltree_nodes[NODE_COUNT]; |
|
/* |
* head of free nodes' list: |
*/ |
static avltree_node_t *first_free_node = NULL; |
|
static int test_tree_balance(avltree_node_t *node); |
static avltree_node_t *test_tree_parents(avltree_node_t *node); |
static void print_tree_structure_flat (avltree_node_t *node, int level); |
static avltree_node_t *alloc_avltree_node(void); |
|
static avltree_node_t *test_tree_parents(avltree_node_t *node) |
{ |
avltree_node_t *tmp; |
|
if (!node) |
return NULL; |
|
if (node->lft) { |
tmp = test_tree_parents(node->lft); |
if (tmp != node) { |
printf("Bad parent pointer key: %d, address: %p\n", |
tmp->key, node->lft); |
} |
} |
if (node->rgt) { |
tmp = test_tree_parents(node->rgt); |
if (tmp != node) { |
printf("Bad parent pointer key: %d, address: %p\n", |
tmp->key,node->rgt); |
} |
} |
return node->par; |
} |
|
int test_tree_balance(avltree_node_t *node) |
{ |
int h1, h2, diff; |
|
if (!node) |
return 0; |
h1 = test_tree_balance(node->lft); |
h2 = test_tree_balance(node->rgt); |
diff = h2 - h1; |
if (diff != node->balance || (diff != -1 && diff != 0 && diff != 1)) { |
printf("Bad balance\n"); |
} |
return h1 > h2 ? h1 + 1 : h2 + 1; |
} |
|
/** |
* Prints the structure of the node, which is level levels from the top of the |
* tree. |
*/ |
static void print_tree_structure_flat(avltree_node_t *node, int level) |
{ |
/* |
* You can set the maximum level as high as you like. |
* Most of the time, you'll want to debug code using small trees, |
* so that a large level indicates a loop, which is a bug. |
*/ |
if (level > 16) { |
printf("[...]"); |
return; |
} |
|
if (node == NULL) |
return; |
|
printf("%d[%d]", node->key, node->balance); |
if (node->lft != NULL || node->rgt != NULL) { |
printf("("); |
|
print_tree_structure_flat(node->lft, level + 1); |
if (node->rgt != NULL) { |
printf(","); |
print_tree_structure_flat(node->rgt, level + 1); |
} |
|
printf(")"); |
} |
} |
|
static void alloc_avltree_node_prepare(void) |
{ |
int i; |
|
for (i = 0; i < NODE_COUNT - 1; i++) { |
avltree_nodes[i].par = &avltree_nodes[i + 1]; |
} |
|
/* |
* Node keys which will be used for insertion. Up to NODE_COUNT size of |
* array. |
*/ |
|
/* First tree node and same key */ |
avltree_nodes[0].key = 60; |
avltree_nodes[1].key = 60; |
avltree_nodes[2].key = 60; |
/* LL rotation */ |
avltree_nodes[3].key = 50; |
avltree_nodes[4].key = 40; |
avltree_nodes[5].key = 30; |
/* LR rotation */ |
avltree_nodes[6].key = 20; |
avltree_nodes[7].key = 20; |
avltree_nodes[8].key = 25; |
avltree_nodes[9].key = 25; |
/* LL rotation in lower floor */ |
avltree_nodes[10].key = 35; |
/* RR rotation */ |
avltree_nodes[11].key = 70; |
avltree_nodes[12].key = 80; |
/* RL rotation */ |
avltree_nodes[13].key = 90; |
avltree_nodes[14].key = 85; |
/* Insert 0 key */ |
avltree_nodes[15].key = 0; |
avltree_nodes[16].key = 0; |
/* Insert reverse */ |
avltree_nodes[17].key = 600; |
avltree_nodes[18].key = 500; |
avltree_nodes[19].key = 400; |
avltree_nodes[20].key = 300; |
|
for (i = 21; i < NODE_COUNT; i++) |
avltree_nodes[i].key = i * 3; |
|
avltree_nodes[i].par = NULL; |
first_free_node = &avltree_nodes[0]; |
} |
|
static avltree_node_t *alloc_avltree_node(void) |
{ |
avltree_node_t *node; |
|
node = first_free_node; |
first_free_node = first_free_node->par; |
|
return node; |
} |
|
static void test_tree_insert(avltree_t *tree, count_t node_count, bool quiet) |
{ |
unsigned int i; |
avltree_node_t *newnode; |
|
avltree_create(tree); |
|
if (!quiet) |
printf("Inserting %d nodes...", node_count); |
|
for (i = 0; i < node_count; i++) { |
newnode = alloc_avltree_node(); |
|
avltree_insert(tree, newnode); |
if (!quiet) { |
test_tree_parents(tree->root); |
test_tree_balance(tree->root); |
} |
} |
|
if (!quiet) |
printf("done.\n"); |
} |
|
|
static void test_tree_delete(avltree_t *tree, count_t node_count, |
int node_position, bool quiet) |
{ |
avltree_node_t *delnode; |
unsigned int i; |
|
switch (node_position) { |
case 0: |
if (!quiet) |
printf("Deleting root nodes..."); |
while (tree->root != NULL) { |
delnode = tree->root; |
avltree_delete(tree, delnode); |
if (!quiet) { |
test_tree_parents(tree->root); |
test_tree_balance(tree->root); |
} |
} |
break; |
case 1: |
if (!quiet) |
printf("Deleting nodes according to creation time..."); |
for (i = 0; i < node_count; i++) { |
avltree_delete(tree, &avltree_nodes[i]); |
if (!quiet) { |
test_tree_parents(tree->root); |
test_tree_balance(tree->root); |
} |
} |
break; |
} |
|
if (!quiet) |
printf("done.\n"); |
} |
|
static void test_tree_delmin(avltree_t *tree, count_t node_count, bool quiet) |
{ |
int i = 0; |
|
if (!quiet) |
printf("Deleting minimum nodes..."); |
|
while (tree->root != NULL) { |
i++; |
avltree_delete_min(tree); |
if (!quiet) { |
test_tree_parents(tree->root); |
test_tree_balance(tree->root); |
} |
} |
|
if (!quiet && (i != node_count)) |
printf("Bad node count. Some nodes have been lost!\n"); |
|
if (!quiet) |
printf("done.\n"); |
} |
|
char *test_avltree1(bool quiet) |
{ |
alloc_avltree_node_prepare(); |
test_tree_insert(&avltree, NODE_COUNT, quiet); |
test_tree_delete(&avltree, NODE_COUNT, 0, quiet); |
|
alloc_avltree_node_prepare(); |
test_tree_insert(&avltree, NODE_COUNT, quiet); |
test_tree_delete(&avltree, NODE_COUNT, 1, quiet); |
|
alloc_avltree_node_prepare(); |
test_tree_insert(&avltree, NODE_COUNT, quiet); |
test_tree_delmin(&avltree, NODE_COUNT, quiet); |
|
return NULL; |
} |
|