2 #include "git-compat-util.h"
8 int padding; /* hashmap entry no longer needs to be the first member */
9 struct hashmap_entry ent;
10 /* key and value as two \0-terminated strings */
14 static const char *get_value(const struct test_entry *e)
16 return e->key + strlen(e->key) + 1;
19 static int test_entry_cmp(const void *cmp_data,
20 const struct hashmap_entry *eptr,
21 const struct hashmap_entry *entry_or_key,
24 const int ignore_case = cmp_data ? *((int *)cmp_data) : 0;
25 const struct test_entry *e1, *e2;
26 const char *key = keydata;
28 e1 = container_of(eptr, const struct test_entry, ent);
29 e2 = container_of(entry_or_key, const struct test_entry, ent);
32 return strcasecmp(e1->key, key ? key : e2->key);
34 return strcmp(e1->key, key ? key : e2->key);
37 static struct test_entry *alloc_test_entry(unsigned int hash,
38 char *key, char *value)
40 size_t klen = strlen(key);
41 size_t vlen = strlen(value);
42 struct test_entry *entry = xmalloc(st_add4(sizeof(*entry), klen, vlen, 2));
43 hashmap_entry_init(&entry->ent, hash);
44 memcpy(entry->key, key, klen + 1);
45 memcpy(entry->key + klen + 1, value, vlen + 1);
49 #define HASH_METHOD_FNV 0
50 #define HASH_METHOD_I 1
51 #define HASH_METHOD_IDIV10 2
52 #define HASH_METHOD_0 3
53 #define HASH_METHOD_X2 4
56 #define TEST_SIZE 100000
58 static unsigned int hash(unsigned int method, unsigned int i, const char *key)
60 unsigned int hash = 0;
69 case HASH_METHOD_IDIV10:
77 if (method & HASH_METHOD_X2)
83 * Test performance of hashmap.[ch]
84 * Usage: time echo "perfhashmap method rounds" | test-tool hashmap
86 static void perf_hashmap(unsigned int method, unsigned int rounds)
90 struct test_entry **entries;
94 ALLOC_ARRAY(entries, TEST_SIZE);
95 ALLOC_ARRAY(hashes, TEST_SIZE);
96 for (i = 0; i < TEST_SIZE; i++) {
97 xsnprintf(buf, sizeof(buf), "%i", i);
98 entries[i] = alloc_test_entry(0, buf, "");
99 hashes[i] = hash(method, i, entries[i]->key);
102 if (method & TEST_ADD) {
103 /* test adding to the map */
104 for (j = 0; j < rounds; j++) {
105 hashmap_init(&map, test_entry_cmp, NULL, 0);
108 for (i = 0; i < TEST_SIZE; i++) {
109 hashmap_entry_init(&entries[i]->ent, hashes[i]);
110 hashmap_add(&map, &entries[i]->ent);
116 /* test map lookups */
117 hashmap_init(&map, test_entry_cmp, NULL, 0);
119 /* fill the map (sparsely if specified) */
120 j = (method & TEST_SPARSE) ? TEST_SIZE / 10 : TEST_SIZE;
121 for (i = 0; i < j; i++) {
122 hashmap_entry_init(&entries[i]->ent, hashes[i]);
123 hashmap_add(&map, &entries[i]->ent);
126 for (j = 0; j < rounds; j++) {
127 for (i = 0; i < TEST_SIZE; i++) {
128 hashmap_get_from_hash(&map, hashes[i],
137 #define DELIM " \t\r\n"
140 * Read stdin line by line and print result of commands to stdout:
142 * hash key -> strhash(key) memhash(key) strihash(key) memihash(key)
143 * put key value -> NULL / old value
144 * get key -> NULL / value
145 * remove key -> NULL / old value
146 * iterate -> key1 value1\nkey2 value2\n...
147 * size -> tablesize numentries
149 * perfhashmap method rounds -> test hashmap.[ch] performance
151 int cmd__hashmap(int argc, const char **argv)
153 struct strbuf line = STRBUF_INIT;
158 icase = argc > 1 && !strcmp("ignorecase", argv[1]);
159 hashmap_init(&map, test_entry_cmp, &icase, 0);
161 /* process commands from stdin */
162 while (strbuf_getline(&line, stdin) != EOF) {
163 char *cmd, *p1 = NULL, *p2 = NULL;
164 unsigned int hash = 0;
165 struct test_entry *entry;
167 /* break line into command and up to two parameters */
168 cmd = strtok(line.buf, DELIM);
169 /* ignore empty lines */
170 if (!cmd || *cmd == '#')
173 p1 = strtok(NULL, DELIM);
175 hash = icase ? strihash(p1) : strhash(p1);
176 p2 = strtok(NULL, DELIM);
179 if (!strcmp("add", cmd) && p1 && p2) {
181 /* create entry with key = p1, value = p2 */
182 entry = alloc_test_entry(hash, p1, p2);
185 hashmap_add(&map, &entry->ent);
187 } else if (!strcmp("put", cmd) && p1 && p2) {
189 /* create entry with key = p1, value = p2 */
190 entry = alloc_test_entry(hash, p1, p2);
192 /* add / replace entry */
193 entry = hashmap_put_entry(&map, entry, ent);
195 /* print and free replaced entry, if any */
196 puts(entry ? get_value(entry) : "NULL");
199 } else if (!strcmp("get", cmd) && p1) {
200 /* lookup entry in hashmap */
201 entry = hashmap_get_entry_from_hash(&map, hash, p1,
202 struct test_entry, ent);
207 hashmap_for_each_entry_from(&map, entry, ent)
208 puts(get_value(entry));
210 } else if (!strcmp("remove", cmd) && p1) {
212 /* setup static key */
213 struct hashmap_entry key;
214 struct hashmap_entry *rm;
215 hashmap_entry_init(&key, hash);
217 /* remove entry from hashmap */
218 rm = hashmap_remove(&map, &key, p1);
219 entry = rm ? container_of(rm, struct test_entry, ent)
222 /* print result and free entry*/
223 puts(entry ? get_value(entry) : "NULL");
226 } else if (!strcmp("iterate", cmd)) {
227 struct hashmap_iter iter;
229 hashmap_for_each_entry(&map, &iter, entry,
230 ent /* member name */)
231 printf("%s %s\n", entry->key, get_value(entry));
233 } else if (!strcmp("size", cmd)) {
235 /* print table sizes */
236 printf("%u %u\n", map.tablesize,
237 hashmap_get_size(&map));
239 } else if (!strcmp("intern", cmd) && p1) {
241 /* test that strintern works */
242 const char *i1 = strintern(p1);
243 const char *i2 = strintern(p1);
245 printf("strintern(%s) returns %s\n", p1, i1);
247 printf("strintern(%s) returns input pointer\n", p1);
249 printf("strintern(%s) != strintern(%s)", i1, i2);
253 } else if (!strcmp("perfhashmap", cmd) && p1 && p2) {
255 perf_hashmap(atoi(p1), atoi(p2));
259 printf("Unknown command %s\n", cmd);
264 strbuf_release(&line);
265 hashmap_free_entries(&map, struct test_entry, ent);