62 lines
1.3 KiB
C++
62 lines
1.3 KiB
C++
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/* Copyright (C) Teemu Suutari */
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#ifndef OUTPUTSTREAM_HPP
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#define OUTPUTSTREAM_HPP
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#include <cstddef>
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#include <cstdint>
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#include "common/Buffer.hpp"
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namespace ancient::internal
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{
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class ForwardOutputStream
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{
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public:
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ForwardOutputStream(Buffer &buffer,size_t startOffset,size_t endOffset);
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~ForwardOutputStream();
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void writeByte(uint8_t value);
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uint8_t copy(size_t distance,size_t count);
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uint8_t copy(size_t distance,size_t count,const Buffer &prevBuffer);
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uint8_t copy(size_t distance,size_t count,uint8_t defaultChar);
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const uint8_t *history(size_t distance) const;
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void produce(const uint8_t *src,size_t bytes);
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bool eof() const { return _currentOffset==_endOffset; }
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size_t getOffset() const { return _currentOffset; }
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size_t getEndOffset() const { return _endOffset; }
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private:
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uint8_t *_bufPtr;
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size_t _startOffset;
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size_t _currentOffset;
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size_t _endOffset;
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};
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class BackwardOutputStream
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{
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public:
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BackwardOutputStream(Buffer &buffer,size_t startOffset,size_t endOffset);
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~BackwardOutputStream();
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void writeByte(uint8_t value);
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uint8_t copy(size_t distance,size_t count);
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bool eof() const { return _currentOffset==_startOffset; }
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size_t getOffset() const { return _currentOffset; }
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private:
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uint8_t *_bufPtr;
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size_t _startOffset;
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size_t _currentOffset;
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size_t _endOffset;
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};
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}
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#endif
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