2 * Copyright (c) 2015 Nuxi, https://nuxi.nl/
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
30 #define _SEARCH_PRIVATE
35 /* Validates the integrity of an AVL tree. */
36 static inline unsigned int
37 tnode_assert(const posix_tnode *n)
39 unsigned int height_left, height_right;
44 height_left = tnode_assert(n->llink);
45 height_right = tnode_assert(n->rlink);
46 balance = (int)height_left - (int)height_right;
47 ATF_CHECK(balance >= -1);
48 ATF_CHECK(balance <= 1);
49 ATF_CHECK_EQ(balance, n->balance);
50 return (height_left > height_right ? height_left : height_right) + 1;
54 compar(const void *a, const void *b)
57 return *(int *)a - *(int *)b;
60 ATF_TC_WITHOUT_HEAD(tsearch_test);
61 ATF_TC_BODY(tsearch_test, tc)
64 * Run the test below in a deterministic fashion to prevent this
65 * test from potentially flapping. We assume that this provides
69 unsigned short random_state[3];
70 arc4random_buf(random_state, sizeof(random_state));
72 unsigned short random_state[3] = { 26554, 13330, 3246 };
76 /* Create 1000 possible keys. */
78 for (int i = 0; i < NKEYS; ++i)
81 /* Apply random operations on a binary tree and check the results. */
82 posix_tnode *root = NULL;
83 bool present[NKEYS] = {};
84 for (int i = 0; i < NKEYS * 10; ++i) {
85 int key = nrand48(random_state) % NKEYS;
86 switch (nrand48(random_state) % 3) {
87 case 0: /* tdelete(). */
89 ATF_CHECK(tdelete(&key, &root, compar) != NULL);
93 tdelete(&key, &root, compar));
96 case 1: /* tfind(). */
98 ATF_CHECK_EQ(&keys[key],
99 *(int **)tfind(&key, &root, compar));
101 ATF_CHECK_EQ(NULL, tfind(&key, &root, compar));
104 case 2: /* tsearch(). */
106 ATF_CHECK_EQ(&keys[key],
107 *(int **)tsearch(&key, &root, compar));
109 ATF_CHECK_EQ(&keys[key], *(int **)tsearch(
110 &keys[key], &root, compar));
118 /* Remove all entries from the tree. */
119 for (int key = 0; key < NKEYS; ++key)
121 ATF_CHECK(tdelete(&key, &root, compar) != NULL);
122 ATF_CHECK_EQ(NULL, root);
128 ATF_TP_ADD_TC(tp, tsearch_test);
130 return (atf_no_error());