Merge branch 'rs/fix-alt-odb-path-comparison' into maint
[git.git] / test-hashmap.c
blobf5183fb9e82575c86355b690178a8c3d96175eb4
1 #include "git-compat-util.h"
2 #include "hashmap.h"
4 struct test_entry
6 struct hashmap_entry ent;
7 /* key and value as two \0-terminated strings */
8 char key[FLEX_ARRAY];
9 };
11 static const char *get_value(const struct test_entry *e)
13 return e->key + strlen(e->key) + 1;
16 static int test_entry_cmp(const struct test_entry *e1,
17 const struct test_entry *e2, const char* key)
19 return strcmp(e1->key, key ? key : e2->key);
22 static int test_entry_cmp_icase(const struct test_entry *e1,
23 const struct test_entry *e2, const char* key)
25 return strcasecmp(e1->key, key ? key : e2->key);
28 static struct test_entry *alloc_test_entry(int hash, char *key, int klen,
29 char *value, int vlen)
31 struct test_entry *entry = malloc(sizeof(struct test_entry) + klen
32 + vlen + 2);
33 hashmap_entry_init(entry, hash);
34 memcpy(entry->key, key, klen + 1);
35 memcpy(entry->key + klen + 1, value, vlen + 1);
36 return entry;
39 #define HASH_METHOD_FNV 0
40 #define HASH_METHOD_I 1
41 #define HASH_METHOD_IDIV10 2
42 #define HASH_METHOD_0 3
43 #define HASH_METHOD_X2 4
44 #define TEST_SPARSE 8
45 #define TEST_ADD 16
46 #define TEST_SIZE 100000
48 static unsigned int hash(unsigned int method, unsigned int i, const char *key)
50 unsigned int hash;
51 switch (method & 3)
53 case HASH_METHOD_FNV:
54 hash = strhash(key);
55 break;
56 case HASH_METHOD_I:
57 hash = i;
58 break;
59 case HASH_METHOD_IDIV10:
60 hash = i / 10;
61 break;
62 case HASH_METHOD_0:
63 hash = 0;
64 break;
67 if (method & HASH_METHOD_X2)
68 hash = 2 * hash;
69 return hash;
73 * Test performance of hashmap.[ch]
74 * Usage: time echo "perfhashmap method rounds" | test-hashmap
76 static void perf_hashmap(unsigned int method, unsigned int rounds)
78 struct hashmap map;
79 char buf[16];
80 struct test_entry **entries;
81 unsigned int *hashes;
82 unsigned int i, j;
84 entries = malloc(TEST_SIZE * sizeof(struct test_entry *));
85 hashes = malloc(TEST_SIZE * sizeof(int));
86 for (i = 0; i < TEST_SIZE; i++) {
87 snprintf(buf, sizeof(buf), "%i", i);
88 entries[i] = alloc_test_entry(0, buf, strlen(buf), "", 0);
89 hashes[i] = hash(method, i, entries[i]->key);
92 if (method & TEST_ADD) {
93 /* test adding to the map */
94 for (j = 0; j < rounds; j++) {
95 hashmap_init(&map, (hashmap_cmp_fn) test_entry_cmp, 0);
97 /* add entries */
98 for (i = 0; i < TEST_SIZE; i++) {
99 hashmap_entry_init(entries[i], hashes[i]);
100 hashmap_add(&map, entries[i]);
103 hashmap_free(&map, 0);
105 } else {
106 /* test map lookups */
107 hashmap_init(&map, (hashmap_cmp_fn) test_entry_cmp, 0);
109 /* fill the map (sparsely if specified) */
110 j = (method & TEST_SPARSE) ? TEST_SIZE / 10 : TEST_SIZE;
111 for (i = 0; i < j; i++) {
112 hashmap_entry_init(entries[i], hashes[i]);
113 hashmap_add(&map, entries[i]);
116 for (j = 0; j < rounds; j++) {
117 for (i = 0; i < TEST_SIZE; i++) {
118 struct hashmap_entry key;
119 hashmap_entry_init(&key, hashes[i]);
120 hashmap_get(&map, &key, entries[i]->key);
124 hashmap_free(&map, 0);
128 #define DELIM " \t\r\n"
131 * Read stdin line by line and print result of commands to stdout:
133 * hash key -> strhash(key) memhash(key) strihash(key) memihash(key)
134 * put key value -> NULL / old value
135 * get key -> NULL / value
136 * remove key -> NULL / old value
137 * iterate -> key1 value1\nkey2 value2\n...
138 * size -> tablesize numentries
140 * perfhashmap method rounds -> test hashmap.[ch] performance
142 int main(int argc, char *argv[])
144 char line[1024];
145 struct hashmap map;
146 int icase;
148 /* init hash map */
149 icase = argc > 1 && !strcmp("ignorecase", argv[1]);
150 hashmap_init(&map, (hashmap_cmp_fn) (icase ? test_entry_cmp_icase
151 : test_entry_cmp), 0);
153 /* process commands from stdin */
154 while (fgets(line, sizeof(line), stdin)) {
155 char *cmd, *p1 = NULL, *p2 = NULL;
156 int l1 = 0, l2 = 0, hash = 0;
157 struct test_entry *entry;
159 /* break line into command and up to two parameters */
160 cmd = strtok(line, DELIM);
161 /* ignore empty lines */
162 if (!cmd || *cmd == '#')
163 continue;
165 p1 = strtok(NULL, DELIM);
166 if (p1) {
167 l1 = strlen(p1);
168 hash = icase ? strihash(p1) : strhash(p1);
169 p2 = strtok(NULL, DELIM);
170 if (p2)
171 l2 = strlen(p2);
174 if (!strcmp("hash", cmd) && l1) {
176 /* print results of different hash functions */
177 printf("%u %u %u %u\n", strhash(p1), memhash(p1, l1),
178 strihash(p1), memihash(p1, l1));
180 } else if (!strcmp("add", cmd) && l1 && l2) {
182 /* create entry with key = p1, value = p2 */
183 entry = alloc_test_entry(hash, p1, l1, p2, l2);
185 /* add to hashmap */
186 hashmap_add(&map, entry);
188 } else if (!strcmp("put", cmd) && l1 && l2) {
190 /* create entry with key = p1, value = p2 */
191 entry = alloc_test_entry(hash, p1, l1, p2, l2);
193 /* add / replace entry */
194 entry = hashmap_put(&map, entry);
196 /* print and free replaced entry, if any */
197 puts(entry ? get_value(entry) : "NULL");
198 free(entry);
200 } else if (!strcmp("get", cmd) && l1) {
202 /* setup static key */
203 struct hashmap_entry key;
204 hashmap_entry_init(&key, hash);
206 /* lookup entry in hashmap */
207 entry = hashmap_get(&map, &key, p1);
209 /* print result */
210 if (!entry)
211 puts("NULL");
212 while (entry) {
213 puts(get_value(entry));
214 entry = hashmap_get_next(&map, entry);
217 } else if (!strcmp("remove", cmd) && l1) {
219 /* setup static key */
220 struct hashmap_entry key;
221 hashmap_entry_init(&key, hash);
223 /* remove entry from hashmap */
224 entry = hashmap_remove(&map, &key, p1);
226 /* print result and free entry*/
227 puts(entry ? get_value(entry) : "NULL");
228 free(entry);
230 } else if (!strcmp("iterate", cmd)) {
232 struct hashmap_iter iter;
233 hashmap_iter_init(&map, &iter);
234 while ((entry = hashmap_iter_next(&iter)))
235 printf("%s %s\n", entry->key, get_value(entry));
237 } else if (!strcmp("size", cmd)) {
239 /* print table sizes */
240 printf("%u %u\n", map.tablesize, map.size);
242 } else if (!strcmp("perfhashmap", cmd) && l1 && l2) {
244 perf_hashmap(atoi(p1), atoi(p2));
246 } else {
248 printf("Unknown command %s\n", cmd);
253 hashmap_free(&map, 1);
254 return 0;