2 * Copyright (c) 2015 Nuxi, https://nuxi.nl/
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27 #define _SEARCH_PRIVATE
33 static int n_nodes = 0;
34 static int n_seen = 0;
36 /* Validates the integrity of an AVL tree. */
37 static inline unsigned int
38 tnode_assert(const posix_tnode *n)
40 unsigned int height_left, height_right;
45 height_left = tnode_assert(n->llink);
46 height_right = tnode_assert(n->rlink);
47 balance = (int)height_left - (int)height_right;
48 ATF_CHECK(balance >= -1);
49 ATF_CHECK(balance <= 1);
50 ATF_CHECK_EQ(balance, n->balance);
51 return (height_left > height_right ? height_left : height_right) + 1;
55 compar(const void *a, const void *b)
58 return *(int *)a - *(int *)b;
62 treewalk(const posix_tnode *node, VISIT v, int level)
65 if (v == postorder || v == leaf)
69 ATF_TC_WITHOUT_HEAD(tsearch_test);
70 ATF_TC_BODY(tsearch_test, tc)
73 * Run the test below in a deterministic fashion to prevent this
74 * test from potentially flapping. We assume that this provides
78 unsigned short random_state[3];
79 arc4random_buf(random_state, sizeof(random_state));
81 unsigned short random_state[3] = { 26554, 13330, 3246 };
85 /* Create 1000 possible keys. */
87 for (int i = 0; i < NKEYS; ++i)
90 /* Apply random operations on a binary tree and check the results. */
91 posix_tnode *root = NULL;
92 bool present[NKEYS] = {};
93 for (int i = 0; i < NKEYS * 10; ++i) {
94 int key = nrand48(random_state) % NKEYS;
98 * Ensure each case is tested at least 10 times, plus a
101 if ((sample % NKEYS) > 3)
102 sample = nrand48(random_state) % 3;
105 case 0: /* tdelete(). */
107 ATF_CHECK(tdelete(&key, &root, compar) != NULL);
108 present[key] = false;
109 ATF_CHECK(n_nodes > 0);
113 tdelete(&key, &root, compar));
116 case 1: /* tfind(). */
118 ATF_CHECK_EQ(&keys[key],
119 *(int **)tfind(&key, &root, compar));
121 ATF_CHECK_EQ(NULL, tfind(&key, &root, compar));
124 case 2: /* tsearch(). */
126 ATF_CHECK_EQ(&keys[key],
127 *(int **)tsearch(&key, &root, compar));
129 ATF_CHECK_EQ(&keys[key], *(int **)tsearch(
130 &keys[key], &root, compar));
140 twalk(root, treewalk);
141 ATF_CHECK_EQ(n_nodes, n_seen);
143 /* Remove all entries from the tree. */
144 for (int key = 0; key < NKEYS; ++key)
146 ATF_CHECK(tdelete(&key, &root, compar) != NULL);
147 ATF_CHECK_EQ(NULL, root);
153 ATF_TP_ADD_TC(tp, tsearch_test);
155 return (atf_no_error());