113 lines
3 KiB
C++
113 lines
3 KiB
C++
/*
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* Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-GPL2
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* Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
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* Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
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*/
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#ifndef __UPDATEMASK_H
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#define __UPDATEMASK_H
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#include "UpdateFields.h"
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#include "Errors.h"
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#include "ByteBuffer.h"
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class UpdateMask
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{
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public:
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/// Type representing how client reads update mask
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typedef uint32 ClientUpdateMaskType;
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enum UpdateMaskCount
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{
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CLIENT_UPDATE_MASK_BITS = sizeof(ClientUpdateMaskType) * 8,
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};
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UpdateMask() { }
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UpdateMask(UpdateMask const& right) : _bits(nullptr)
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{
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SetCount(right.GetCount());
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memcpy(_bits, right._bits, sizeof(uint8) * _blockCount * 32);
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}
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~UpdateMask() { delete[] _bits; }
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void SetBit(uint32 index) { _bits[index] = 1; }
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void UnsetBit(uint32 index) { _bits[index] = 0; }
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[[nodiscard]] bool GetBit(uint32 index) const { return _bits[index] != 0; }
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void AppendToPacket(ByteBuffer* data)
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{
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for (uint32 i = 0; i < GetBlockCount(); ++i)
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{
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ClientUpdateMaskType maskPart = 0;
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for (uint32 j = 0; j < CLIENT_UPDATE_MASK_BITS; ++j)
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if (_bits[CLIENT_UPDATE_MASK_BITS * i + j])
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maskPart |= 1 << j;
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*data << maskPart;
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}
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}
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[[nodiscard]] uint32 GetBlockCount() const { return _blockCount; }
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[[nodiscard]] uint32 GetCount() const { return _fieldCount; }
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void SetCount(uint32 valuesCount)
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{
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delete[] _bits;
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_fieldCount = valuesCount;
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_blockCount = (valuesCount + CLIENT_UPDATE_MASK_BITS - 1) / CLIENT_UPDATE_MASK_BITS;
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_bits = new uint8[_blockCount * CLIENT_UPDATE_MASK_BITS];
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memset(_bits, 0, sizeof(uint8) * _blockCount * CLIENT_UPDATE_MASK_BITS);
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}
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void Clear()
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{
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if (_bits)
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memset(_bits, 0, sizeof(uint8) * _blockCount * CLIENT_UPDATE_MASK_BITS);
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}
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UpdateMask& operator=(UpdateMask const& right)
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{
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if (this == &right)
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return *this;
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SetCount(right.GetCount());
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memcpy(_bits, right._bits, sizeof(uint8) * _blockCount * CLIENT_UPDATE_MASK_BITS);
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return *this;
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}
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UpdateMask& operator&=(UpdateMask const& right)
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{
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ASSERT(right.GetCount() <= GetCount());
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for (uint32 i = 0; i < _fieldCount; ++i)
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_bits[i] &= right._bits[i];
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return *this;
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}
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UpdateMask& operator|=(UpdateMask const& right)
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{
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ASSERT(right.GetCount() <= GetCount());
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for (uint32 i = 0; i < _fieldCount; ++i)
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_bits[i] |= right._bits[i];
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return *this;
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}
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UpdateMask operator|(UpdateMask const& right)
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{
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UpdateMask ret(*this);
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ret |= right;
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return ret;
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}
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private:
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uint32 _fieldCount{0};
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uint32 _blockCount{0};
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uint8* _bits{nullptr};
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};
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#endif
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