1 #include "git-compat-util.h"
7 struct hashmap_entry ent;
8 /* key and value as two \0-terminated strings */
12 static const char *get_value(const struct test_entry *e)
14 return e->key + strlen(e->key) + 1;
17 static int test_entry_cmp(const void *cmp_data,
19 const void *entry_or_key,
22 const int ignore_case = cmp_data ? *((int *)cmp_data) : 0;
23 const struct test_entry *e1 = entry;
24 const struct test_entry *e2 = entry_or_key;
25 const char *key = keydata;
28 return strcasecmp(e1->key, key ? key : e2->key);
30 return strcmp(e1->key, key ? key : e2->key);
33 static struct test_entry *alloc_test_entry(unsigned int hash,
34 char *key, char *value)
36 size_t klen = strlen(key);
37 size_t vlen = strlen(value);
38 struct test_entry *entry = xmalloc(st_add4(sizeof(*entry), klen, vlen, 2));
39 hashmap_entry_init(entry, hash);
40 memcpy(entry->key, key, klen + 1);
41 memcpy(entry->key + klen + 1, value, vlen + 1);
45 #define HASH_METHOD_FNV 0
46 #define HASH_METHOD_I 1
47 #define HASH_METHOD_IDIV10 2
48 #define HASH_METHOD_0 3
49 #define HASH_METHOD_X2 4
52 #define TEST_SIZE 100000
54 static unsigned int hash(unsigned int method, unsigned int i, const char *key)
56 unsigned int hash = 0;
65 case HASH_METHOD_IDIV10:
73 if (method & HASH_METHOD_X2)
79 * Test performance of hashmap.[ch]
80 * Usage: time echo "perfhashmap method rounds" | test-hashmap
82 static void perf_hashmap(unsigned int method, unsigned int rounds)
86 struct test_entry **entries;
90 ALLOC_ARRAY(entries, TEST_SIZE);
91 ALLOC_ARRAY(hashes, TEST_SIZE);
92 for (i = 0; i < TEST_SIZE; i++) {
93 xsnprintf(buf, sizeof(buf), "%i", i);
94 entries[i] = alloc_test_entry(0, buf, "");
95 hashes[i] = hash(method, i, entries[i]->key);
98 if (method & TEST_ADD) {
99 /* test adding to the map */
100 for (j = 0; j < rounds; j++) {
101 hashmap_init(&map, test_entry_cmp, NULL, 0);
104 for (i = 0; i < TEST_SIZE; i++) {
105 hashmap_entry_init(entries[i], hashes[i]);
106 hashmap_add(&map, entries[i]);
109 hashmap_free(&map, 0);
112 /* test map lookups */
113 hashmap_init(&map, test_entry_cmp, NULL, 0);
115 /* fill the map (sparsely if specified) */
116 j = (method & TEST_SPARSE) ? TEST_SIZE / 10 : TEST_SIZE;
117 for (i = 0; i < j; i++) {
118 hashmap_entry_init(entries[i], hashes[i]);
119 hashmap_add(&map, entries[i]);
122 for (j = 0; j < rounds; j++) {
123 for (i = 0; i < TEST_SIZE; i++) {
124 hashmap_get_from_hash(&map, hashes[i],
129 hashmap_free(&map, 0);
133 #define DELIM " \t\r\n"
136 * Read stdin line by line and print result of commands to stdout:
138 * hash key -> strhash(key) memhash(key) strihash(key) memihash(key)
139 * put key value -> NULL / old value
140 * get key -> NULL / value
141 * remove key -> NULL / old value
142 * iterate -> key1 value1\nkey2 value2\n...
143 * size -> tablesize numentries
145 * perfhashmap method rounds -> test hashmap.[ch] performance
147 int cmd_main(int argc, const char **argv)
149 struct strbuf line = STRBUF_INIT;
154 icase = argc > 1 && !strcmp("ignorecase", argv[1]);
155 hashmap_init(&map, test_entry_cmp, &icase, 0);
157 /* process commands from stdin */
158 while (strbuf_getline(&line, stdin) != EOF) {
159 char *cmd, *p1 = NULL, *p2 = NULL;
160 unsigned int hash = 0;
161 struct test_entry *entry;
163 /* break line into command and up to two parameters */
164 cmd = strtok(line.buf, DELIM);
165 /* ignore empty lines */
166 if (!cmd || *cmd == '#')
169 p1 = strtok(NULL, DELIM);
171 hash = icase ? strihash(p1) : strhash(p1);
172 p2 = strtok(NULL, DELIM);
175 if (!strcmp("hash", cmd) && p1) {
177 /* print results of different hash functions */
178 printf("%u %u %u %u\n",
179 strhash(p1), memhash(p1, strlen(p1)),
180 strihash(p1), memihash(p1, strlen(p1)));
182 } else if (!strcmp("add", cmd) && p1 && p2) {
184 /* create entry with key = p1, value = p2 */
185 entry = alloc_test_entry(hash, p1, p2);
188 hashmap_add(&map, entry);
190 } else if (!strcmp("put", cmd) && p1 && p2) {
192 /* create entry with key = p1, value = p2 */
193 entry = alloc_test_entry(hash, p1, p2);
195 /* add / replace entry */
196 entry = hashmap_put(&map, entry);
198 /* print and free replaced entry, if any */
199 puts(entry ? get_value(entry) : "NULL");
202 } else if (!strcmp("get", cmd) && p1) {
204 /* lookup entry in hashmap */
205 entry = hashmap_get_from_hash(&map, hash, p1);
211 puts(get_value(entry));
212 entry = hashmap_get_next(&map, entry);
215 } else if (!strcmp("remove", cmd) && p1) {
217 /* setup static key */
218 struct hashmap_entry key;
219 hashmap_entry_init(&key, hash);
221 /* remove entry from hashmap */
222 entry = hashmap_remove(&map, &key, p1);
224 /* print result and free entry*/
225 puts(entry ? get_value(entry) : "NULL");
228 } else if (!strcmp("iterate", cmd)) {
230 struct hashmap_iter iter;
231 hashmap_iter_init(&map, &iter);
232 while ((entry = hashmap_iter_next(&iter)))
233 printf("%s %s\n", entry->key, get_value(entry));
235 } else if (!strcmp("size", cmd)) {
237 /* print table sizes */
238 printf("%u %u\n", map.tablesize,
239 hashmap_get_size(&map));
241 } else if (!strcmp("intern", cmd) && p1) {
243 /* test that strintern works */
244 const char *i1 = strintern(p1);
245 const char *i2 = strintern(p1);
247 printf("strintern(%s) returns %s\n", p1, i1);
249 printf("strintern(%s) returns input pointer\n", p1);
251 printf("strintern(%s) != strintern(%s)", i1, i2);
255 } else if (!strcmp("perfhashmap", cmd) && p1 && p2) {
257 perf_hashmap(atoi(p1), atoi(p2));
261 printf("Unknown command %s\n", cmd);
266 strbuf_release(&line);
267 hashmap_free(&map, 1);