/usr/include/dlib/general_hash/hash.h is in libdlib-dev 18.18-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 | // Copyright (C) 2011 Davis E. King (davis@dlib.net)
// License: Boost Software License See LICENSE.txt for the full license.
#ifndef DLIB_HAsH_Hh_
#define DLIB_HAsH_Hh_
#include "hash_abstract.h"
#include <vector>
#include <string>
#include <map>
#include "murmur_hash3.h"
#include "../algs.h"
namespace dlib
{
// ----------------------------------------------------------------------------------------
inline uint32 hash (
const std::string& item,
uint32 seed = 0
)
{
if (item.size() == 0)
return 0;
else
return murmur_hash3(&item[0], sizeof(item[0])*item.size(), seed);
}
// ----------------------------------------------------------------------------------------
inline uint32 hash (
const std::wstring& item,
uint32 seed = 0
)
{
if (item.size() == 0)
return 0;
else
return murmur_hash3(&item[0], sizeof(item[0])*item.size(), seed);
}
// ----------------------------------------------------------------------------------------
template <typename T, typename alloc>
uint32 hash (
const std::vector<T,alloc>& item,
uint32 seed = 0
)
{
DLIB_ASSERT_HAS_STANDARD_LAYOUT(T);
if (item.size() == 0)
return 0;
else
return murmur_hash3(&item[0], sizeof(T)*item.size(), seed);
}
// ----------------------------------------------------------------------------------------
template <typename T, typename U, typename alloc>
uint32 hash (
const std::vector<std::pair<T,U>,alloc>& item,
uint32 seed = 0
)
{
DLIB_ASSERT_HAS_STANDARD_LAYOUT(T);
DLIB_ASSERT_HAS_STANDARD_LAYOUT(U);
if (item.size() == 0)
return 0;
else
return murmur_hash3(&item[0], sizeof(item[0])*item.size(), seed);
}
// ----------------------------------------------------------------------------------------
template <typename T, typename U, typename comp, typename alloc>
uint32 hash (
const std::map<T,U,comp,alloc>& item,
uint32 seed = 0
)
{
return hash(std::vector<std::pair<T,U> >(item.begin(), item.end()), seed);
}
// ----------------------------------------------------------------------------------------
inline uint32 hash (
uint32 val,
uint32 seed = 0
)
{
return murmur_hash3_2(val,seed);
}
// ----------------------------------------------------------------------------------------
inline uint32 hash (
uint64 val,
uint32 seed = 0
)
{
return static_cast<uint32>(murmur_hash3_128bit_3(val,seed,0).first);
}
// ----------------------------------------------------------------------------------------
inline uint32 hash (
const std::pair<uint64,uint64>& item,
uint32 seed = 0
)
{
return static_cast<uint32>(murmur_hash3_128bit_3(item.first,item.second,seed).first);
}
// ----------------------------------------------------------------------------------------
inline uint32 hash (
const std::pair<uint32,uint32>& item,
uint32 seed = 0
)
{
return murmur_hash3_3(item.first,item.second,seed);
}
// ----------------------------------------------------------------------------------------
template <typename T, typename U>
uint32 hash (
const std::pair<T,U>& item,
uint32 seed = 0
)
{
return hash(item.first, seed) ^ hash(item.second, seed+1);
}
// ----------------------------------------------------------------------------------------
}
#endif // DLIB_HAsH_Hh_
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