mirror of
https://github.com/TrinityCore/TrinityCore.git
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129 lines
3.3 KiB
C++
129 lines
3.3 KiB
C++
/*
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* This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TRINITYCORE_MESSAGE_BUFFER_H
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#define TRINITYCORE_MESSAGE_BUFFER_H
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#include "Define.h"
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#include <vector>
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#include <cstring>
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class MessageBuffer
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{
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typedef std::vector<uint8>::size_type size_type;
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public:
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MessageBuffer() : _wpos(0), _rpos(0), _storage()
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{
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_storage.resize(4096);
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}
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explicit MessageBuffer(std::size_t initialSize) : _wpos(0), _rpos(0), _storage(initialSize)
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{
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}
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MessageBuffer(MessageBuffer const& right) = default;
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MessageBuffer(MessageBuffer&& right) noexcept : _wpos(right._wpos), _rpos(right._rpos), _storage(std::move(right).Release()) { }
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~MessageBuffer() = default;
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void Reset()
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{
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_wpos = 0;
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_rpos = 0;
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}
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void Resize(size_type bytes)
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{
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_storage.resize(bytes);
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}
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uint8* GetBasePointer() { return _storage.data(); }
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uint8* GetReadPointer() { return GetBasePointer() + _rpos; }
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uint8* GetWritePointer() { return GetBasePointer() + _wpos; }
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void ReadCompleted(size_type bytes) { _rpos += bytes; }
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void WriteCompleted(size_type bytes) { _wpos += bytes; }
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size_type GetActiveSize() const { return _wpos - _rpos; }
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size_type GetRemainingSpace() const { return _storage.size() - _wpos; }
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size_type GetBufferSize() const { return _storage.size(); }
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// Discards inactive data
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void Normalize()
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{
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if (_rpos)
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{
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if (_rpos != _wpos)
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memmove(GetBasePointer(), GetReadPointer(), GetActiveSize());
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_wpos -= _rpos;
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_rpos = 0;
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}
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}
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// Ensures there's "some" free space, make sure to call Normalize() before this
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void EnsureFreeSpace()
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{
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// resize buffer if it's already full
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if (GetRemainingSpace() == 0)
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_storage.resize(_storage.size() * 3 / 2);
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}
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void Write(void const* data, std::size_t size)
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{
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if (size)
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{
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memcpy(GetWritePointer(), data, size);
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WriteCompleted(size);
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}
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}
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std::vector<uint8>&& Release() &&
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{
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Reset();
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return std::move(_storage);
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}
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MessageBuffer& operator=(MessageBuffer const& right) = default;
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MessageBuffer& operator=(MessageBuffer&& right) noexcept
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{
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if (this != &right)
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{
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_wpos = right._wpos;
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_rpos = right._rpos;
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_storage = std::move(right).Release();
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}
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return *this;
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}
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private:
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size_type _wpos;
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size_type _rpos;
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std::vector<uint8> _storage;
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};
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#endif /* __MESSAGEBUFFER_H_ */
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