You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
51 lines
1.0 KiB
51 lines
1.0 KiB
#pragma once
|
|
|
|
#include <gp/algorithm/tmp_manip.hpp>
|
|
#include <gp/array.hpp>
|
|
|
|
#include <atomic>
|
|
|
|
#include <stdint.h>
|
|
|
|
namespace gp {
|
|
template<typename hash_type = uint64_t, uint8_t magnitude = 19, bool threading = false>
|
|
class bloomfilter {
|
|
constexpr static size_t phys_size = (1 << magnitude) / 32;
|
|
gp::array<
|
|
typename gp::either< threading,
|
|
std::atomic_uint32_t,
|
|
uint32_t
|
|
>::type,
|
|
phys_size
|
|
> data;
|
|
|
|
template<typename T>
|
|
static void set_bit(T* value, const int v_pos) {
|
|
*value |= (1 << v_pos);
|
|
}
|
|
|
|
template<typename T>
|
|
static bool get_bit(T* value, const int v_pos) {
|
|
return (*value >> v_pos) & 1;
|
|
}
|
|
|
|
public:
|
|
void set_hash(hash_type v)
|
|
{
|
|
const size_t modulo = v & ((1 << magnitude)-1);
|
|
const size_t p_pos = modulo / 32;
|
|
const size_t v_pos = modulo % 32;
|
|
|
|
set_bit(&data[p_pos], v_pos);
|
|
}
|
|
|
|
bool test_hash(hash_type v)
|
|
{
|
|
const size_t modulo = v & ((1 << magnitude)-1);
|
|
const size_t p_pos = modulo / 32;
|
|
const size_t v_pos = modulo % 32;
|
|
|
|
return get_bit(&data[p_pos], v_pos);
|
|
}
|
|
};
|
|
}
|