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2416 mencl 1
/*
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 * Copyright (c) 2007 Vojtech Mencl
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <test.h>
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#include <print.h>
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#include <adt/avl.h>
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#include <debug.h>
2498 jermar 33
#include <arch/types.h>
2416 mencl 34
 
35
#define NODE_COUNT 100
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37
static avltree_t avltree;
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39
/*
2498 jermar 40
 * avl tree nodes in array for faster allocation
2416 mencl 41
 */
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static avltree_node_t avltree_nodes[NODE_COUNT];
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44
/*
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 * head of free nodes' list:
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 */
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static avltree_node_t *first_free_node = NULL;
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49
static int test_tree_balance(avltree_node_t *node);
2421 mencl 50
static avltree_node_t *test_tree_parents(avltree_node_t *node);
3165 jermar 51
static void print_tree_structure_flat (avltree_node_t *node, int level)
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    __attribute__ ((used));
2416 mencl 53
static avltree_node_t *alloc_avltree_node(void);
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55
static avltree_node_t *test_tree_parents(avltree_node_t *node)
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{
57
    avltree_node_t *tmp;
58
 
2498 jermar 59
    if (!node)
60
        return NULL;
2416 mencl 61
 
62
    if (node->lft) {
63
        tmp = test_tree_parents(node->lft);
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        if (tmp != node) {
3165 jermar 65
            printf("Bad parent pointer key: %" PRIu64
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                ", address: %p\n", tmp->key, node->lft);
2416 mencl 67
        }
68
    }
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    if (node->rgt) {
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        tmp = test_tree_parents(node->rgt);
71
        if (tmp != node) {
3165 jermar 72
            printf("Bad parent pointer key: %" PRIu64
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                ", address: %p\n",
2498 jermar 74
                tmp->key,node->rgt);
2416 mencl 75
        }
76
    }
77
    return node->par;
78
}
79
 
80
int test_tree_balance(avltree_node_t *node)
81
{
82
    int h1, h2, diff;
83
 
2498 jermar 84
    if (!node)
85
        return 0;
2416 mencl 86
    h1 = test_tree_balance(node->lft);
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    h2 = test_tree_balance(node->rgt);
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    diff = h2 - h1;
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    if (diff != node->balance || (diff != -1 && diff != 0 && diff != 1)) {
90
        printf("Bad balance\n");
91
    }
92
    return h1 > h2 ? h1 + 1 : h2 + 1;
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}
94
 
95
/**
2498 jermar 96
 * Prints the structure of the node, which is level levels from the top of the
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 * tree.
2416 mencl 98
 */
3165 jermar 99
static void
100
print_tree_structure_flat(avltree_node_t *node, int level)
2416 mencl 101
{
2498 jermar 102
    /*
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     * You can set the maximum level as high as you like.
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         * Most of the time, you'll want to debug code using small trees,
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         * so that a large level indicates a loop, which is a bug.
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     */
107
    if (level > 16) {
108
        printf("[...]");
2416 mencl 109
        return;
110
    }
111
 
112
    if (node == NULL)
113
        return;
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3069 decky 115
    printf("%" PRIu64 "[%" PRIu8 "]", node->key, node->balance);
2498 jermar 116
    if (node->lft != NULL || node->rgt != NULL) {
2421 mencl 117
        printf("(");
2416 mencl 118
 
2498 jermar 119
        print_tree_structure_flat(node->lft, level + 1);
120
        if (node->rgt != NULL) {
2421 mencl 121
            printf(",");
2498 jermar 122
            print_tree_structure_flat(node->rgt, level + 1);
2416 mencl 123
        }
124
 
2421 mencl 125
        printf(")");
2416 mencl 126
    }
127
}
128
 
129
static void alloc_avltree_node_prepare(void)
130
{
131
    int i;
132
 
133
    for (i = 0; i < NODE_COUNT - 1; i++) {
2498 jermar 134
        avltree_nodes[i].par = &avltree_nodes[i + 1];
2416 mencl 135
    }
3165 jermar 136
    avltree_nodes[i].par = NULL;
2498 jermar 137
 
2416 mencl 138
    /*
2498 jermar 139
     * Node keys which will be used for insertion. Up to NODE_COUNT size of
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     * array.
2416 mencl 141
     */
142
 
2498 jermar 143
    /* First tree node and same key */
2416 mencl 144
    avltree_nodes[0].key = 60;
145
    avltree_nodes[1].key = 60;
146
    avltree_nodes[2].key = 60;
2498 jermar 147
    /* LL rotation */
2416 mencl 148
    avltree_nodes[3].key = 50;
149
    avltree_nodes[4].key = 40;
150
    avltree_nodes[5].key = 30;
2498 jermar 151
    /* LR rotation */
2416 mencl 152
    avltree_nodes[6].key = 20;
153
    avltree_nodes[7].key = 20;
154
    avltree_nodes[8].key = 25;
155
    avltree_nodes[9].key = 25;
2498 jermar 156
    /* LL rotation in lower floor */
2416 mencl 157
    avltree_nodes[10].key = 35;
2498 jermar 158
    /* RR rotation */
2416 mencl 159
    avltree_nodes[11].key = 70;
160
    avltree_nodes[12].key = 80;
2498 jermar 161
    /* RL rotation */
2416 mencl 162
    avltree_nodes[13].key = 90;
163
    avltree_nodes[14].key = 85;
2498 jermar 164
    /* Insert 0 key */
2431 mencl 165
    avltree_nodes[15].key = 0;
166
    avltree_nodes[16].key = 0;
2498 jermar 167
    /* Insert reverse */
2431 mencl 168
    avltree_nodes[17].key = 600;
169
    avltree_nodes[18].key = 500;
170
    avltree_nodes[19].key = 400;
171
    avltree_nodes[20].key = 300;
2416 mencl 172
 
173
    for (i = 21; i < NODE_COUNT; i++)
174
        avltree_nodes[i].key = i * 3;
175
 
2498 jermar 176
    first_free_node = &avltree_nodes[0];
2416 mencl 177
}
178
 
179
static avltree_node_t *alloc_avltree_node(void)
180
{
181
    avltree_node_t *node;
182
 
183
    node = first_free_node;
2421 mencl 184
    first_free_node = first_free_node->par;
2416 mencl 185
 
186
    return node;
187
}
188
 
2498 jermar 189
static void test_tree_insert(avltree_t *tree, count_t node_count, bool quiet)
2416 mencl 190
{
191
    unsigned int i;
192
    avltree_node_t *newnode;
193
 
194
    avltree_create(tree);
195
 
2498 jermar 196
    if (!quiet)
3069 decky 197
        printf("Inserting %" PRIc " nodes...", node_count);
2416 mencl 198
 
199
    for (i = 0; i < node_count; i++) {
200
        newnode = alloc_avltree_node();
201
 
202
        avltree_insert(tree, newnode);
203
        if (!quiet) {
204
            test_tree_parents(tree->root);
205
            test_tree_balance(tree->root);
206
        }
207
    }
208
 
2498 jermar 209
    if (!quiet)
210
        printf("done.\n");
2416 mencl 211
}
212
 
213
 
2498 jermar 214
static void test_tree_delete(avltree_t *tree, count_t node_count,
215
    int node_position, bool quiet)
2416 mencl 216
{
217
    avltree_node_t *delnode;
218
    unsigned int i;
219
 
2498 jermar 220
    switch (node_position) {
221
    case 0:
222
        if (!quiet)
223
            printf("Deleting root nodes...");
224
        while (tree->root != NULL) {
225
            delnode = tree->root;
226
            avltree_delete(tree, delnode);
227
            if (!quiet) {
228
                test_tree_parents(tree->root);
229
                test_tree_balance(tree->root);
2416 mencl 230
            }
2498 jermar 231
        }
232
        break;
233
    case 1:
234
        if (!quiet)
235
            printf("Deleting nodes according to creation time...");
236
        for (i = 0; i < node_count; i++) {
237
            avltree_delete(tree, &avltree_nodes[i]);
238
            if (!quiet) {
239
                test_tree_parents(tree->root);
240
                test_tree_balance(tree->root);
241
            }
242
        }
243
        break; 
2416 mencl 244
    }
245
 
2498 jermar 246
    if (!quiet)
247
        printf("done.\n");
2416 mencl 248
}
249
 
2498 jermar 250
static void test_tree_delmin(avltree_t *tree, count_t node_count, bool quiet)
2416 mencl 251
{
2745 decky 252
    unsigned int i = 0;
2416 mencl 253
 
2498 jermar 254
    if (!quiet)
255
        printf("Deleting minimum nodes...");
2416 mencl 256
 
2498 jermar 257
    while (tree->root != NULL) {
2416 mencl 258
        i++;
259
        avltree_delete_min(tree);
260
        if (!quiet) {
261
            test_tree_parents(tree->root);
262
            test_tree_balance(tree->root);
263
        }
264
    }
265
 
2498 jermar 266
    if (!quiet && (i != node_count))
267
        printf("Bad node count. Some nodes have been lost!\n");
2416 mencl 268
 
2498 jermar 269
    if (!quiet)
270
        printf("done.\n");
2416 mencl 271
}
272
 
2498 jermar 273
char *test_avltree1(bool quiet)
2416 mencl 274
{
275
    alloc_avltree_node_prepare();
2421 mencl 276
    test_tree_insert(&avltree, NODE_COUNT, quiet);
277
    test_tree_delete(&avltree, NODE_COUNT, 0, quiet);
2416 mencl 278
 
279
    alloc_avltree_node_prepare();
2421 mencl 280
    test_tree_insert(&avltree, NODE_COUNT, quiet);
281
    test_tree_delete(&avltree, NODE_COUNT, 1, quiet);
2416 mencl 282
 
283
    alloc_avltree_node_prepare();
2421 mencl 284
    test_tree_insert(&avltree, NODE_COUNT, quiet);
2498 jermar 285
    test_tree_delmin(&avltree, NODE_COUNT, quiet);
2416 mencl 286
 
287
    return NULL;
288
}
2498 jermar 289