blob: 0b8873c2d32505ebae1ee174ccd4c5639445e2a1 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
#ifndef HASH_INL_H_
#error "Direct inclusion of this file is not allowed, include hash.h"
// For the sake of sane code completion.
#include "hash.h"
#endif
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
inline void HashCombine(size_t& h, size_t k)
{
static_assert(sizeof(size_t) == 8, "size_t must be 64 bit.");
const size_t m = 0xc6a4a7935bd1e995ULL;
const int r = 47;
k *= m;
k ^= k >> r;
k *= m;
h ^= k;
h *= m;
}
template <class T>
void HashCombine(size_t& h, const T& k)
{
HashCombine(h, THash<T>()(k));
}
////////////////////////////////////////////////////////////////////////////////
template <class TElement, class TUnderlying>
TRandomizedHash<TElement, TUnderlying>::TRandomizedHash()
: Seed_(RandomNumber<size_t>())
{ }
template <class TElement, class TUnderlying>
size_t TRandomizedHash<TElement, TUnderlying>::operator ()(const TElement& element) const
{
return Underlying_(element) + Seed_;
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
|
