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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26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
30 #define _SEARCH_PRIVATE
36 static int n_nodes = 0;
37 static int n_seen = 0;
39 /* Validates the integrity of an AVL tree. */
40 static inline unsigned int
41 tnode_assert(const posix_tnode *n)
43 unsigned int height_left, height_right;
48 height_left = tnode_assert(n->llink);
49 height_right = tnode_assert(n->rlink);
50 balance = (int)height_left - (int)height_right;
51 ATF_CHECK(balance >= -1);
52 ATF_CHECK(balance <= 1);
53 ATF_CHECK_EQ(balance, n->balance);
54 return (height_left > height_right ? height_left : height_right) + 1;
58 compar(const void *a, const void *b)
61 return *(int *)a - *(int *)b;
65 treewalk(const posix_tnode *node, VISIT v, int level)
68 if (v == postorder || v == leaf)
72 ATF_TC_WITHOUT_HEAD(tsearch_test);
73 ATF_TC_BODY(tsearch_test, tc)
76 * Run the test below in a deterministic fashion to prevent this
77 * test from potentially flapping. We assume that this provides
81 unsigned short random_state[3];
82 arc4random_buf(random_state, sizeof(random_state));
84 unsigned short random_state[3] = { 26554, 13330, 3246 };
88 /* Create 1000 possible keys. */
90 for (int i = 0; i < NKEYS; ++i)
93 /* Apply random operations on a binary tree and check the results. */
94 posix_tnode *root = NULL;
95 bool present[NKEYS] = {};
96 for (int i = 0; i < NKEYS * 10; ++i) {
97 int key = nrand48(random_state) % NKEYS;
101 * Ensure each case is tested at least 10 times, plus a
104 if ((sample % NKEYS) > 3)
105 sample = nrand48(random_state) % 3;
108 case 0: /* tdelete(). */
110 ATF_CHECK(tdelete(&key, &root, compar) != NULL);
111 present[key] = false;
112 ATF_CHECK(n_nodes > 0);
116 tdelete(&key, &root, compar));
119 case 1: /* tfind(). */
121 ATF_CHECK_EQ(&keys[key],
122 *(int **)tfind(&key, &root, compar));
124 ATF_CHECK_EQ(NULL, tfind(&key, &root, compar));
127 case 2: /* tsearch(). */
129 ATF_CHECK_EQ(&keys[key],
130 *(int **)tsearch(&key, &root, compar));
132 ATF_CHECK_EQ(&keys[key], *(int **)tsearch(
133 &keys[key], &root, compar));
143 twalk(root, treewalk);
144 ATF_CHECK_EQ(n_nodes, n_seen);
146 /* Remove all entries from the tree. */
147 for (int key = 0; key < NKEYS; ++key)
149 ATF_CHECK(tdelete(&key, &root, compar) != NULL);
150 ATF_CHECK_EQ(NULL, root);
156 ATF_TP_ADD_TC(tp, tsearch_test);
158 return (atf_no_error());