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66 lines
2.9 KiB
C
66 lines
2.9 KiB
C
#ifndef __JEKINS_HASH_H__
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#define __JEKINS_HASH_H__
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#include "hash.h"
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typedef struct __jenkins_state_t
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{
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CMPH_HASH hashfunc;
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cmph_uint32 seed;
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} jenkins_state_t;
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jenkins_state_t *jenkins_state_new(cmph_uint32 size); //size of hash table
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/** \fn cmph_uint32 jenkins_hash(jenkins_state_t *state, const char *k, cmph_uint32 keylen);
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* \param state is a pointer to a jenkins_state_t structure
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* \param key is a pointer to a key
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* \param keylen is the key length
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* \return an integer that represents a hash value of 32 bits.
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*/
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cmph_uint32 jenkins_hash(jenkins_state_t *state, const char *k, cmph_uint32 keylen);
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/** \fn void jenkins_hash_vector_(jenkins_state_t *state, const char *k, cmph_uint32 keylen, cmph_uint32 * hashes);
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* \param state is a pointer to a jenkins_state_t structure
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* \param key is a pointer to a key
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* \param keylen is the key length
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* \param hashes is a pointer to a memory large enough to fit three 32-bit integers.
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*/
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void jenkins_hash_vector_(jenkins_state_t *state, const char *k, cmph_uint32 keylen, cmph_uint32 * hashes);
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void jenkins_state_dump(jenkins_state_t *state, char **buf, cmph_uint32 *buflen);
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jenkins_state_t *jenkins_state_copy(jenkins_state_t *src_state);
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jenkins_state_t *jenkins_state_load(const char *buf, cmph_uint32 buflen);
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void jenkins_state_destroy(jenkins_state_t *state);
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/** \fn void jenkins_state_pack(jenkins_state_t *state, void *jenkins_packed);
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* \brief Support the ability to pack a jenkins function into a preallocated contiguous memory space pointed by jenkins_packed.
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* \param state points to the jenkins function
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* \param jenkins_packed pointer to the contiguous memory area used to store the jenkins function. The size of jenkins_packed must be at least jenkins_state_packed_size()
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*/
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void jenkins_state_pack(jenkins_state_t *state, void *jenkins_packed);
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/** \fn cmph_uint32 jenkins_state_packed_size();
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* \brief Return the amount of space needed to pack a jenkins function.
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* \return the size of the packed function or zero for failures
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*/
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cmph_uint32 jenkins_state_packed_size();
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/** \fn cmph_uint32 jenkins_hash_packed(void *jenkins_packed, const char *k, cmph_uint32 keylen);
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* \param jenkins_packed is a pointer to a contiguous memory area
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* \param key is a pointer to a key
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* \param keylen is the key length
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* \return an integer that represents a hash value of 32 bits.
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*/
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cmph_uint32 jenkins_hash_packed(void *jenkins_packed, const char *k, cmph_uint32 keylen);
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/** \fn jenkins_hash_vector_packed(void *jenkins_packed, const char *k, cmph_uint32 keylen, cmph_uint32 * hashes);
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* \param jenkins_packed is a pointer to a contiguous memory area
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* \param key is a pointer to a key
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* \param keylen is the key length
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* \param hashes is a pointer to a memory large enough to fit three 32-bit integers.
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*/
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void jenkins_hash_vector_packed(void *jenkins_packed, const char *k, cmph_uint32 keylen, cmph_uint32 * hashes);
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#endif
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