70 lines
1.4 KiB
C++
70 lines
1.4 KiB
C++
/*
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* Deskflow -- mouse and keyboard sharing utility
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* SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
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* SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
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* SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
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*/
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#pragma once
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#include "base/EventTypes.h"
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#include <list>
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#include <vector>
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//! FIFO of bytes
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/*!
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This class maintains a FIFO (first-in, last-out) buffer of bytes.
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*/
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class StreamBuffer
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{
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public:
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StreamBuffer() = default;
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~StreamBuffer() = default;
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//! @name manipulators
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//@{
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//! Read data without removing from buffer
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/*!
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Return a pointer to memory with the next \c n bytes in the buffer
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(which must be <= getSize()). The caller must not modify the returned
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memory nor delete it.
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*/
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const void *peek(uint32_t n);
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//! Discard data
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/*!
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Discards the next \c n bytes. If \c n >= getSize() then the buffer
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is cleared.
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*/
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void pop(uint32_t n);
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//! Write data to buffer
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/*!
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Appends \c n bytes from \c data to the buffer.
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*/
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void write(const void *data, uint32_t n);
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//@}
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//! @name accessors
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//@{
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//! Get size of buffer
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/*!
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Returns the number of bytes in the buffer.
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*/
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uint32_t getSize() const;
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//@}
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private:
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static const uint32_t kChunkSize;
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using Chunk = std::vector<uint8_t>;
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using ChunkList = std::list<Chunk>;
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ChunkList m_chunks;
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uint32_t m_size = 0;
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uint32_t m_headUsed = 0;
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};
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