diff options
Diffstat (limited to 'girepository/cmph/jenkins_hash.h')
-rw-r--r-- | girepository/cmph/jenkins_hash.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/girepository/cmph/jenkins_hash.h b/girepository/cmph/jenkins_hash.h new file mode 100644 index 00000000..8e8b9173 --- /dev/null +++ b/girepository/cmph/jenkins_hash.h @@ -0,0 +1,65 @@ +#ifndef __JEKINS_HASH_H__ +#define __JEKINS_HASH_H__ + +#include "hash.h" + +typedef struct __jenkins_state_t +{ + CMPH_HASH hashfunc; + cmph_uint32 seed; +} jenkins_state_t; + +jenkins_state_t *jenkins_state_new(cmph_uint32 size); //size of hash table + +/** \fn cmph_uint32 jenkins_hash(jenkins_state_t *state, const char *k, cmph_uint32 keylen); + * \param state is a pointer to a jenkins_state_t structure + * \param key is a pointer to a key + * \param keylen is the key length + * \return an integer that represents a hash value of 32 bits. + */ +cmph_uint32 jenkins_hash(jenkins_state_t *state, const char *k, cmph_uint32 keylen); + +/** \fn void jenkins_hash_vector_(jenkins_state_t *state, const char *k, cmph_uint32 keylen, cmph_uint32 * hashes); + * \param state is a pointer to a jenkins_state_t structure + * \param key is a pointer to a key + * \param keylen is the key length + * \param hashes is a pointer to a memory large enough to fit three 32-bit integers. + */ +void jenkins_hash_vector_(jenkins_state_t *state, const char *k, cmph_uint32 keylen, cmph_uint32 * hashes); + +void jenkins_state_dump(jenkins_state_t *state, char **buf, cmph_uint32 *buflen); +jenkins_state_t *jenkins_state_copy(jenkins_state_t *src_state); +jenkins_state_t *jenkins_state_load(const char *buf, cmph_uint32 buflen); +void jenkins_state_destroy(jenkins_state_t *state); + +/** \fn void jenkins_state_pack(jenkins_state_t *state, void *jenkins_packed); + * \brief Support the ability to pack a jenkins function into a preallocated contiguous memory space pointed by jenkins_packed. + * \param state points to the jenkins function + * \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() + */ +void jenkins_state_pack(jenkins_state_t *state, void *jenkins_packed); + +/** \fn cmph_uint32 jenkins_state_packed_size(); + * \brief Return the amount of space needed to pack a jenkins function. + * \return the size of the packed function or zero for failures + */ +cmph_uint32 jenkins_state_packed_size(); + + +/** \fn cmph_uint32 jenkins_hash_packed(void *jenkins_packed, const char *k, cmph_uint32 keylen); + * \param jenkins_packed is a pointer to a contiguous memory area + * \param key is a pointer to a key + * \param keylen is the key length + * \return an integer that represents a hash value of 32 bits. + */ +cmph_uint32 jenkins_hash_packed(void *jenkins_packed, const char *k, cmph_uint32 keylen); + +/** \fn jenkins_hash_vector_packed(void *jenkins_packed, const char *k, cmph_uint32 keylen, cmph_uint32 * hashes); + * \param jenkins_packed is a pointer to a contiguous memory area + * \param key is a pointer to a key + * \param keylen is the key length + * \param hashes is a pointer to a memory large enough to fit three 32-bit integers. + */ +void jenkins_hash_vector_packed(void *jenkins_packed, const char *k, cmph_uint32 keylen, cmph_uint32 * hashes); + +#endif |