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/* HashKit
* Copyright (C) 2010 Brian Aker
* All rights reserved.
*
* Use and distribution licensed under the BSD license. See
* the COPYING file in the parent directory for full text.
*/
#include <libhashkit/common.h>
static hashkit_return_t _set_function(struct hashkit_st::hashkit_function_st *self, hashkit_hash_algorithm_t hash_algorithm)
{
if (self == NULL)
{
return HASHKIT_INVALID_ARGUMENT;
}
switch (hash_algorithm)
{
case HASHKIT_HASH_MD5:
self->function= hashkit_md5;
break;
case HASHKIT_HASH_CRC:
self->function= hashkit_crc32;
break;
case HASHKIT_HASH_FNV1_64:
if (libhashkit_has_algorithm(HASHKIT_HASH_FNV1_64))
{
self->function= hashkit_fnv1_64;
break;
}
return HASHKIT_INVALID_ARGUMENT;
case HASHKIT_HASH_FNV1A_64:
if (libhashkit_has_algorithm(HASHKIT_HASH_FNV1_64))
{
self->function= hashkit_fnv1a_64;
break;
}
return HASHKIT_INVALID_ARGUMENT;
case HASHKIT_HASH_FNV1_32:
self->function= hashkit_fnv1_32;
break;
case HASHKIT_HASH_FNV1A_32:
self->function= hashkit_fnv1a_32;
break;
case HASHKIT_HASH_HSIEH:
if (libhashkit_has_algorithm(HASHKIT_HASH_HSIEH))
{
self->function= hashkit_hsieh;
break;
}
return HASHKIT_INVALID_ARGUMENT;
case HASHKIT_HASH_MURMUR3:
case HASHKIT_HASH_MURMUR:
if (libhashkit_has_algorithm(HASHKIT_HASH_MURMUR))
{
self->function= hashkit_murmur;
break;
}
return HASHKIT_INVALID_ARGUMENT;
case HASHKIT_HASH_JENKINS:
self->function= hashkit_jenkins;
break;
case HASHKIT_HASH_CUSTOM:
return HASHKIT_INVALID_ARGUMENT;
case HASHKIT_HASH_DEFAULT:
self->function= hashkit_one_at_a_time;
break;
case HASHKIT_HASH_MAX:
self->function= hashkit_one_at_a_time;
return HASHKIT_INVALID_HASH;
}
self->context= NULL;
return HASHKIT_SUCCESS;
}
hashkit_return_t hashkit_set_function(hashkit_st *self, hashkit_hash_algorithm_t hash_algorithm)
{
return _set_function(&self->base_hash, hash_algorithm);
}
hashkit_return_t hashkit_set_distribution_function(hashkit_st *self, hashkit_hash_algorithm_t hash_algorithm)
{
return _set_function(&self->distribution_hash, hash_algorithm);
}
static hashkit_return_t _set_custom_function(struct hashkit_st::hashkit_function_st *self, hashkit_hash_fn function, void *context)
{
if (self == NULL)
{
return HASHKIT_INVALID_ARGUMENT;
}
if (function)
{
self->function= function;
self->context= context;
return HASHKIT_SUCCESS;
}
return HASHKIT_FAILURE;
}
hashkit_return_t hashkit_set_custom_function(hashkit_st *self, hashkit_hash_fn function, void *context)
{
if (self == NULL)
{
return HASHKIT_INVALID_ARGUMENT;
}
return _set_custom_function(&self->base_hash, function, context);
}
hashkit_return_t hashkit_set_custom_distribution_function(hashkit_st *self, hashkit_hash_fn function, void *context)
{
if (self == NULL)
{
return HASHKIT_INVALID_ARGUMENT;
}
return _set_custom_function(&self->distribution_hash, function, context);
}
static hashkit_hash_algorithm_t get_function_type(const hashkit_hash_fn function)
{
if (function == hashkit_one_at_a_time)
{
return HASHKIT_HASH_DEFAULT;
}
else if (function == hashkit_md5)
{
return HASHKIT_HASH_MD5;
}
else if (function == hashkit_crc32)
{
return HASHKIT_HASH_CRC;
}
else if (function == hashkit_fnv1_64)
{
return HASHKIT_HASH_FNV1_64;
}
else if (function == hashkit_fnv1a_64)
{
return HASHKIT_HASH_FNV1A_64;
}
else if (function == hashkit_fnv1_32)
{
return HASHKIT_HASH_FNV1_32;
}
else if (function == hashkit_fnv1a_32)
{
return HASHKIT_HASH_FNV1A_32;
}
else if (function == hashkit_hsieh)
{
return HASHKIT_HASH_HSIEH;
}
else if (function == hashkit_murmur)
{
return HASHKIT_HASH_MURMUR;
}
else if (function == hashkit_jenkins)
{
return HASHKIT_HASH_JENKINS;
}
return HASHKIT_HASH_CUSTOM;
}
hashkit_hash_algorithm_t hashkit_get_function(const hashkit_st *self)
{
if (self == NULL)
{
return HASHKIT_HASH_DEFAULT;
}
return get_function_type(self->base_hash.function);
}
hashkit_hash_algorithm_t hashkit_get_distribution_function(const hashkit_st *self)
{
if (self == NULL)
{
return HASHKIT_HASH_DEFAULT;
}
return get_function_type(self->distribution_hash.function);
}
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