motiejus/turbonss
1
Fork 0
Code Releases Activity

*** empty log message ***

Browse Source
This commit is contained in:
fc_botelho
2008-03-26 20:26:48 +00:00
parent beafb103e7
commit bc478aff26
25 changed files with 1875 additions and 88 deletions
Download Patch File Download Diff File Expand all files Collapse all files

47
src/cmph.h
View File

@@ -51,7 +51,31 @@ void cmph_config_destroy(cmph_config_t *mph);
/** Hash API **/
cmph_t *cmph_new(cmph_config_t *mph);
/** cmph_uint32 cmph_search(cmph_t *mphf, const char *key, cmph_uint32 keylen);
* \brief Computes the mphf value.
* \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
*/
cmph_uint32 cmph_search(cmph_t *mphf, const char *key, cmph_uint32 keylen);
/** cmph_uint32 cmph_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 cmph_search_fingerprint(cmph_t *mphf, const char *key, cmph_uint32 keylen, cmph_uint32 * fingerprint);
cmph_uint32 cmph_size(cmph_t *mphf);
void cmph_destroy(cmph_t *mphf);
@@ -59,6 +83,29 @@ void cmph_destroy(cmph_t *mphf);
int cmph_dump(cmph_t *mphf, FILE *f);
cmph_t *cmph_load(FILE *f);
/** \fn void cmph_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
* \param packed_mphf pointer to the contiguous memory area used to store the resulting mphf. The size of packed_mphf must be at least cmph_packed_size()
*/
void cmph_pack(cmph_t *mphf, void *packed_mphf);
/** \fn cmph_uint32 cmph_packed_size(cmph_t *mphf);
* \brief Return the amount of space needed to pack mphf.
* \param mphf pointer to a mphf
* \return the size of the packed function or zero for failures
*/
cmph_uint32 cmph_packed_size(cmph_t *mphf);
/** cmph_uint32 cmph_search(void *packed_mphf, const char *key, cmph_uint32 keylen);
* \brief Use the packed mphf to do a search.
* \param packed_mphf pointer to the packed mphf
* \param key key to be hashed
* \param keylen key legth in bytes
* \return The mphf value
*/
cmph_uint32 cmph_search_packed(void *packed_mphf, const char *key, cmph_uint32 keylen);
#ifdef __cplusplus
}
#endif