summaryrefslogtreecommitdiffstats
path: root/tests/trie.c
blob: 41b729ed0a779e1c10c0a75b909d25fef684431f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
// Copyright © Tavian Barnes <tavianator@tavianator.com>
// SPDX-License-Identifier: 0BSD

#include "prelude.h"

#include "bfs.h"
#include "diag.h"
#include "tests.h"
#include "trie.h"

#include <stdlib.h>
#include <string.h>

static const char *keys[] = {
	"foo",
	"bar",
	"baz",
	"qux",
	"quux",
	"quuux",
	"quuuux",

	"pre",
	"pref",
	"prefi",
	"prefix",

	"AAAA",
	"AADD",
	"ABCD",
	"DDAA",
	"DDDD",

	"<<<",
	"<<<>>>",
	"<<<<<<",
	"<<<<<<>>>>>>",
	">>>>>>",
	">>><<<",
	">>>",
};

static const size_t nkeys = countof(keys);

void check_trie(void) {
	struct trie trie;
	trie_init(&trie);

	for (size_t i = 0; i < nkeys; ++i) {
		bfs_check(!trie_find_str(&trie, keys[i]));

		const char *prefix = NULL;
		for (size_t j = 0; j < i; ++j) {
			if (strncmp(keys[i], keys[j], strlen(keys[j])) == 0) {
				if (!prefix || strcmp(keys[j], prefix) > 0) {
					prefix = keys[j];
				}
			}
		}

		struct trie_leaf *leaf = trie_find_prefix(&trie, keys[i]);
		if (prefix) {
			bfs_verify(leaf);
			bfs_check(strcmp(prefix, leaf->key) == 0);
		} else {
			bfs_check(!leaf);
		}

		leaf = trie_insert_str(&trie, keys[i]);
		bfs_verify(leaf);
		bfs_check(strcmp(keys[i], leaf->key) == 0);
		bfs_check(leaf->length == strlen(keys[i]) + 1);
	}

	{
		size_t i = 0;
		for_trie (leaf, &trie) {
			bfs_check(leaf == trie_find_str(&trie, keys[i]));
			bfs_check(!leaf->prev || leaf->prev->next == leaf);
			bfs_check(!leaf->next || leaf->next->prev == leaf);
			++i;
		}
		bfs_check(i == nkeys);
	}

	for (size_t i = 0; i < nkeys; ++i) {
		struct trie_leaf *leaf = trie_find_str(&trie, keys[i]);
		bfs_verify(leaf);
		bfs_check(strcmp(keys[i], leaf->key) == 0);
		bfs_check(leaf->length == strlen(keys[i]) + 1);

		trie_remove(&trie, leaf);
		leaf = trie_find_str(&trie, keys[i]);
		bfs_check(!leaf);

		const char *postfix = NULL;
		for (size_t j = i + 1; j < nkeys; ++j) {
			if (strncmp(keys[i], keys[j], strlen(keys[i])) == 0) {
				if (!postfix || strcmp(keys[j], postfix) < 0) {
					postfix = keys[j];
				}
			}
		}

		leaf = trie_find_postfix(&trie, keys[i]);
		if (postfix) {
			bfs_verify(leaf);
			bfs_check(strcmp(postfix, leaf->key) == 0);
		} else {
			bfs_check(!leaf);
		}
	}

	for_trie (leaf, &trie) {
		bfs_check(false, "trie should be empty");
	}

	// This tests the "jump" node handling on 32-bit platforms
	size_t longsize = 1 << 20;
	char *longstr = malloc(longsize);
	bfs_verify(longstr);

	memset(longstr, 0xAC, longsize);
	bfs_check(!trie_find_mem(&trie, longstr, longsize));
	bfs_check(trie_insert_mem(&trie, longstr, longsize));

	memset(longstr + longsize / 2, 0xAB, longsize / 2);
	bfs_check(!trie_find_mem(&trie, longstr, longsize));
	bfs_check(trie_insert_mem(&trie, longstr, longsize));

	memset(longstr, 0xAA, longsize / 2);
	bfs_check(!trie_find_mem(&trie, longstr, longsize));
	bfs_check(trie_insert_mem(&trie, longstr, longsize));

	free(longstr);
	trie_destroy(&trie);
}