void *oidmap_get(const struct oidmap *map, const struct object_id *key)
{
if (!map->map.cmpfn)
return NULL;
return hashmap_get_from_hash(&map->map, hash(key), key);
}
char *i18n_translate(const char *s)
{
struct map_entry *entry;
int hash = 0;
hash = strihash(s);
entry = hashmap_get_from_hash(&map, hash, s);
return entry ? (char *)get_value(entry) : NULL;
}
/*
* Return the ref_store instance for the specified submodule. If that
* ref_store hasn't been initialized yet, return NULL.
*/
static struct ref_store *lookup_submodule_ref_store(const char *submodule)
{
struct submodule_hash_entry *entry;
if (!submodule_ref_stores.tablesize)
/* It's initialized on demand in register_ref_store(). */
return NULL;
entry = hashmap_get_from_hash(&submodule_ref_stores,
strhash(submodule), submodule);
return entry ? entry->refs : NULL;
}
/*
* 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++) {
hashmap_get_from_hash(&map, hashes[i],
entries[i]->key);
}
}
hashmap_free(&map, 0);
}
}
struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int icase)
{
struct cache_entry *ce;
lazy_init_name_hash(istate);
ce = hashmap_get_from_hash(&istate->name_hash,
memihash(name, namelen), NULL);
while (ce) {
if (same_name(ce, name, namelen, icase))
return ce;
ce = hashmap_get_next(&istate->name_hash, ce);
}
return NULL;
}
static inline struct commit_name *find_commit_name(const unsigned char *peeled)
{
return hashmap_get_from_hash(&names, sha1hash(peeled), peeled);
}
/*
* 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) {
/* lookup entry in hashmap */
entry = hashmap_get_from_hash(&map, hash, 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("intern", cmd) && l1) {
/* test that strintern works */
const char *i1 = strintern(p1);
const char *i2 = strintern(p1);
if (strcmp(i1, p1))
printf("strintern(%s) returns %s\n", p1, i1);
else if (i1 == p1)
printf("strintern(%s) returns input pointer\n", p1);
else if (i1 != i2)
printf("strintern(%s) != strintern(%s)", i1, i2);
else
printf("%s\n", i1);
} 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;
}
