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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/*
* This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef UpdateMask_h__
#define UpdateMask_h__
#include "Define.h"
#include <algorithm>
#include <cstring> // std::memset
namespace UpdateMaskHelpers
{
inline constexpr std::size_t GetBlockIndex(std::size_t bit) { return bit / 32u; }
inline constexpr uint32 GetBlockFlag(std::size_t bit) { return 1u << (bit % 32u); }
}
template<uint32 Bits>
class UpdateMask
{
public:
static constexpr uint32 BlockCount = (Bits + 31) / 32;
static constexpr uint32 BlocksMaskCount = (BlockCount + 31) / 32;
constexpr UpdateMask() : _blocksMask(), _blocks()
{
}
constexpr UpdateMask(std::array<uint32, BlockCount> const& init)
{
_blocksMask.back() = 0; // only last value of blocksMask will not be written fully
for (uint32 block = 0; block < BlockCount; ++block)
{
if ((_blocks[block] = init[block]) != 0)
_blocksMask[UpdateMaskHelpers::GetBlockIndex(block)] |= UpdateMaskHelpers::GetBlockFlag(block);
else
_blocksMask[UpdateMaskHelpers::GetBlockIndex(block)] &= ~UpdateMaskHelpers::GetBlockFlag(block);
}
}
constexpr uint32 GetBlocksMask(uint32 index) const
{
return _blocksMask[index];
}
constexpr uint32 GetBlock(uint32 index) const
{
return _blocks[index];
}
constexpr bool operator[](uint32 index) const
{
return (_blocks[UpdateMaskHelpers::GetBlockIndex(index)] & UpdateMaskHelpers::GetBlockFlag(index)) != 0;
}
constexpr bool IsAnySet() const
{
return std::ranges::any_of(_blocksMask, [](uint32 blockMask)
{
return blockMask != 0;
});
}
constexpr void Reset(uint32 index)
{
std::size_t blockIndex = UpdateMaskHelpers::GetBlockIndex(index);
if (!(_blocks[blockIndex] &= ~UpdateMaskHelpers::GetBlockFlag(index)))
_blocksMask[UpdateMaskHelpers::GetBlockIndex(blockIndex)] &= ~UpdateMaskHelpers::GetBlockFlag(blockIndex);
}
constexpr void ResetAll()
{
_blocksMask = { };
_blocks = { };
}
constexpr void Set(uint32 index)
{
std::size_t blockIndex = UpdateMaskHelpers::GetBlockIndex(index);
_blocks[blockIndex] |= UpdateMaskHelpers::GetBlockFlag(index);
_blocksMask[UpdateMaskHelpers::GetBlockIndex(blockIndex)] |= UpdateMaskHelpers::GetBlockFlag(blockIndex);
}
constexpr void SetAll()
{
std::memset(_blocksMask.data(), 0xFF, _blocksMask.size() * sizeof(typename decltype(_blocksMask)::value_type));
if constexpr (BlocksMaskCount % 32)
{
constexpr uint32 unused = 32 - (BlocksMaskCount % 32);
_blocksMask.back() &= (0xFFFFFFFF >> unused);
}
std::memset(_blocks.data(), 0xFF, _blocks.size() * sizeof(typename decltype(_blocks)::value_type));
if constexpr (BlockCount % 32)
{
constexpr uint32 unused = 32 - (BlockCount % 32);
_blocks.back() &= (0xFFFFFFFF >> unused);
}
}
constexpr UpdateMask& operator&=(UpdateMask const& right)
{
for (uint32 i = 0; i < BlocksMaskCount; ++i)
_blocksMask[i] &= right._blocksMask[i];
for (uint32 i = 0; i < BlockCount; ++i)
if (!(_blocks[i] &= right._blocks[i]))
_blocksMask[UpdateMaskHelpers::GetBlockIndex(i)] &= ~UpdateMaskHelpers::GetBlockFlag(i);
return *this;
}
constexpr UpdateMask& operator|=(UpdateMask const& right)
{
for (std::size_t i = 0; i < BlocksMaskCount; ++i)
_blocksMask[i] |= right._blocksMask[i];
for (std::size_t i = 0; i < BlockCount; ++i)
_blocks[i] |= right._blocks[i];
return *this;
}
private:
std::array<uint32, BlocksMaskCount> _blocksMask;
std::array<uint32, BlockCount> _blocks;
};
template<uint32 Bits>
constexpr UpdateMask<Bits> operator&(UpdateMask<Bits> const& left, UpdateMask<Bits> const& right)
{
UpdateMask<Bits> result = left;
result &= right;
return result;
}
template<uint32 Bits>
constexpr UpdateMask<Bits> operator|(UpdateMask<Bits> const& left, UpdateMask<Bits> const& right)
{
UpdateMask<Bits> result = left;
result |= right;
return result;
}
#endif // UpdateMask_h__
|
