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Removed fingerprint methods and fixed pending bugs.

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This commit is contained in:
davi
2008-04-28 01:18:23 +00:00
parent 522c66581e
commit b5cc0a8ea8
21 changed files with 6 additions and 743 deletions
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31
src/bmz.c
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@@ -22,7 +22,7 @@ static void bmz_traverse_non_critical_nodes(bmz_config_data_t *bmz, cmph_uint8 *
bmz_config_data_t *bmz_config_new()
{
bmz_config_data_t *bmz;
bmz_config_data_t *bmz = NULL;
bmz = (bmz_config_data_t *)malloc(sizeof(bmz_config_data_t));
assert(bmz);
memset(bmz, 0, sizeof(bmz_config_data_t));
@@ -539,35 +539,6 @@ void bmz_destroy(cmph_t *mphf)
free(mphf);
}
/** cmph_uint32 bmz_search_fingerprint(cmph_t *mphf, const char *key, cmph_uint32 keylen, cmph_uint32 * fingerprint);
* \brief Computes the mphf value and a fingerprint of 12 bytes (i.e., figerprint should be a prealocated area to fit three 4-byte integers).
* \param mphf pointer to the resulting function
* \param key is the key to be hashed
* \param keylen is the key legth in bytes
* \return The mphf value
*
* Computes the mphf value and a fingerprint of 12 bytes. The figerprint pointer should be
* a prealocated area to fit three 4-byte integers. You don't need to use all the 12 bytes
* as fingerprint. According to the application, just few bits can be enough, once mphf does
* not allow collisions for the keys previously known.
*/
cmph_uint32 bmz_search_fingerprint(cmph_t *mphf, const char *key, cmph_uint32 keylen, cmph_uint32 * fingerprint)
{
bmz_data_t *bmz = mphf->data;
cmph_uint32 h1, h2;
hash_vector(bmz->hashes[0], key, keylen, fingerprint);
h1 = fingerprint[2] % bmz->n;
hash_vector(bmz->hashes[1], key, keylen, fingerprint);
h2 = fingerprint[2] % bmz->n;
DEBUGP("key: %s h1: %u h2: %u\n", key, h1, h2);
if (h1 == h2 && ++h2 > bmz->n) h2 = 0;
DEBUGP("key: %s g[h1]: %u g[h2]: %u edges: %u\n", key, bmz->g[h1], bmz->g[h2], bmz->m);
return bmz->g[h1] + bmz->g[h2];
}
/** \fn void bmz_pack(cmph_t *mphf, void *packed_mphf);
* \brief Support the ability to pack a perfect hash function into a preallocated contiguous memory space pointed by packed_mphf.
* \param mphf pointer to the resulting mphf