41 lines
841 B
C++
41 lines
841 B
C++
#pragma once
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#include <cstdint>
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namespace nf7 {
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class Buffer {
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public:
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enum Flag : uint8_t {
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kRead = 1 << 0,
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kWrite = 1 << 1,
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};
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using Flags = uint8_t;
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class IOException;
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Buffer() = default;
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virtual ~Buffer() = default;
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Buffer(const Buffer&) = delete;
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Buffer(Buffer&&) = delete;
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Buffer& operator=(const Buffer&) = delete;
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Buffer& operator=(Buffer&&) = delete;
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virtual void Lock() = 0;
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virtual void Unlock() = 0;
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virtual size_t Read(size_t offset, uint8_t* buf, size_t size) = 0;
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virtual size_t Write(size_t offset, const uint8_t* buf, size_t size) = 0;
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virtual size_t Truncate(size_t size) = 0;
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virtual size_t size() const = 0;
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virtual Flags flags() const noexcept = 0;
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};
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class Buffer::IOException : public nf7::Exception {
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public:
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using Exception::Exception;
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};
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} // namespace nf7
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