summaryrefslogtreecommitdiff
path: root/test-hashmap.c
blob: f5183fb9e82575c86355b690178a8c3d96175eb4 (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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
#include "git-compat-util.h"
#include "hashmap.h"
 
struct test_entry
{
	struct hashmap_entry ent;
	/* key and value as two \0-terminated strings */
	char key[FLEX_ARRAY];
};
 
static const char *get_value(const struct test_entry *e)
{
	return e->key + strlen(e->key) + 1;
}
 
static int test_entry_cmp(const struct test_entry *e1,
		const struct test_entry *e2, const char* key)
{
	return strcmp(e1->key, key ? key : e2->key);
}
 
static int test_entry_cmp_icase(const struct test_entry *e1,
		const struct test_entry *e2, const char* key)
{
	return strcasecmp(e1->key, key ? key : e2->key);
}
 
static struct test_entry *alloc_test_entry(int hash, char *key, int klen,
		char *value, int vlen)
{
	struct test_entry *entry = malloc(sizeof(struct test_entry) + klen
			+ vlen + 2);
	hashmap_entry_init(entry, hash);
	memcpy(entry->key, key, klen + 1);
	memcpy(entry->key + klen + 1, value, vlen + 1);
	return entry;
}
 
#define HASH_METHOD_FNV 0
#define HASH_METHOD_I 1
#define HASH_METHOD_IDIV10 2
#define HASH_METHOD_0 3
#define HASH_METHOD_X2 4
#define TEST_SPARSE 8
#define TEST_ADD 16
#define TEST_SIZE 100000
 
static unsigned int hash(unsigned int method, unsigned int i, const char *key)
{
	unsigned int hash;
	switch (method & 3)
	{
	case HASH_METHOD_FNV:
		hash = strhash(key);
		break;
	case HASH_METHOD_I:
		hash = i;
		break;
	case HASH_METHOD_IDIV10:
		hash = i / 10;
		break;
	case HASH_METHOD_0:
		hash = 0;
		break;
	}
 
	if (method & HASH_METHOD_X2)
		hash = 2 * hash;
	return hash;
}
 
/*
 * Test performance of hashmap.[ch]
 * Usage: time echo "perfhashmap method rounds" | test-hashmap
 */
static void perf_hashmap(unsigned int method, unsigned int rounds)
{
	struct hashmap map;
	char buf[16];
	struct test_entry **entries;
	unsigned int *hashes;
	unsigned int i, j;
 
	entries = malloc(TEST_SIZE * sizeof(struct test_entry *));
	hashes = malloc(TEST_SIZE * sizeof(int));
	for (i = 0; i < TEST_SIZE; i++) {
		snprintf(buf, sizeof(buf), "%i", i);
		entries[i] = alloc_test_entry(0, buf, strlen(buf), "", 0);
		hashes[i] = hash(method, i, entries[i]->key);
	}
 
	if (method & TEST_ADD) {
		/* test adding to the map */
		for (j = 0; j < rounds; j++) {
			hashmap_init(&map, (hashmap_cmp_fn) test_entry_cmp, 0);
 
			/* add entries */
			for (i = 0; i < TEST_SIZE; i++) {
				hashmap_entry_init(entries[i], hashes[i]);
				hashmap_add(&map, entries[i]);
			}
 
			hashmap_free(&map, 0);
		}
	} else {
		/* test map lookups */
		hashmap_init(&map, (hashmap_cmp_fn) test_entry_cmp, 0);
 
		/* fill the map (sparsely if specified) */
		j = (method & TEST_SPARSE) ? TEST_SIZE / 10 : TEST_SIZE;
		for (i = 0; i < j; i++) {
			hashmap_entry_init(entries[i], hashes[i]);
			hashmap_add(&map, entries[i]);
		}
 
		for (j = 0; j < rounds; j++) {
			for (i = 0; i < TEST_SIZE; i++) {
				struct hashmap_entry key;
				hashmap_entry_init(&key, hashes[i]);
				hashmap_get(&map, &key, entries[i]->key);
			}
		}
 
		hashmap_free(&map, 0);
	}
}
 
#define DELIM " \t\r\n"
 
/*
 * Read stdin line by line and print result of commands to stdout:
 *
 * hash key -> strhash(key) memhash(key) strihash(key) memihash(key)
 * put key value -> NULL / old value
 * get key -> NULL / value
 * remove key -> NULL / old value
 * iterate -> key1 value1\nkey2 value2\n...
 * size -> tablesize numentries
 *
 * perfhashmap method rounds -> test hashmap.[ch] performance
 */
int main(int argc, char *argv[])
{
	char line[1024];
	struct hashmap map;
	int icase;
 
	/* init hash map */
	icase = argc > 1 && !strcmp("ignorecase", argv[1]);
	hashmap_init(&map, (hashmap_cmp_fn) (icase ? test_entry_cmp_icase
			: test_entry_cmp), 0);
 
	/* process commands from stdin */
	while (fgets(line, sizeof(line), stdin)) {
		char *cmd, *p1 = NULL, *p2 = NULL;
		int l1 = 0, l2 = 0, hash = 0;
		struct test_entry *entry;
 
		/* break line into command and up to two parameters */
		cmd = strtok(line, DELIM);
		/* ignore empty lines */
		if (!cmd || *cmd == '#')
			continue;
 
		p1 = strtok(NULL, DELIM);
		if (p1) {
			l1 = strlen(p1);
			hash = icase ? strihash(p1) : strhash(p1);
			p2 = strtok(NULL, DELIM);
			if (p2)
				l2 = strlen(p2);
		}
 
		if (!strcmp("hash", cmd) && l1) {
 
			/* print results of different hash functions */
			printf("%u %u %u %u\n", strhash(p1), memhash(p1, l1),
					strihash(p1), memihash(p1, l1));
 
		} else if (!strcmp("add", cmd) && l1 && l2) {
 
			/* create entry with key = p1, value = p2 */
			entry = alloc_test_entry(hash, p1, l1, p2, l2);
 
			/* add to hashmap */
			hashmap_add(&map, entry);
 
		} else if (!strcmp("put", cmd) && l1 && l2) {
 
			/* create entry with key = p1, value = p2 */
			entry = alloc_test_entry(hash, p1, l1, p2, l2);
 
			/* add / replace entry */
			entry = hashmap_put(&map, entry);
 
			/* print and free replaced entry, if any */
			puts(entry ? get_value(entry) : "NULL");
			free(entry);
 
		} else if (!strcmp("get", cmd) && l1) {
 
			/* setup static key */
			struct hashmap_entry key;
			hashmap_entry_init(&key, hash);
 
			/* lookup entry in hashmap */
			entry = hashmap_get(&map, &key, p1);
 
			/* print result */
			if (!entry)
				puts("NULL");
			while (entry) {
				puts(get_value(entry));
				entry = hashmap_get_next(&map, entry);
			}
 
		} else if (!strcmp("remove", cmd) && l1) {
 
			/* setup static key */
			struct hashmap_entry key;
			hashmap_entry_init(&key, hash);
 
			/* remove entry from hashmap */
			entry = hashmap_remove(&map, &key, p1);
 
			/* print result and free entry*/
			puts(entry ? get_value(entry) : "NULL");
			free(entry);
 
		} else if (!strcmp("iterate", cmd)) {
 
			struct hashmap_iter iter;
			hashmap_iter_init(&map, &iter);
			while ((entry = hashmap_iter_next(&iter)))
				printf("%s %s\n", entry->key, get_value(entry));
 
		} else if (!strcmp("size", cmd)) {
 
			/* print table sizes */
			printf("%u %u\n", map.tablesize, map.size);
 
		} else if (!strcmp("perfhashmap", cmd) && l1 && l2) {
 
			perf_hashmap(atoi(p1), atoi(p2));
 
		} else {
 
			printf("Unknown command %s\n", cmd);
 
		}
	}
 
	hashmap_free(&map, 1);
	return 0;
}