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#pragma once
#include "Stream.h"
#include <functional>
namespace cru::io {
struct ProxyStreamHandlers {
std::function<Index(Index offset, Stream::SeekOrigin origin)> seek;
std::function<Index(std::byte* buffer, Index offset, Index size)> read;
std::function<Index(const std::byte* buffer, Index offset, Index size)> write;
std::function<void()> flush;
/**
* @brief This method will be only called once when `Close` is called or the
* stream is destructed.
*/
std::function<void()> close;
};
class ProxyStream : public Stream {
public:
explicit ProxyStream(ProxyStreamHandlers handlers);
~ProxyStream() override;
public:
CRU_STREAM_IMPLEMENT_CLOSE_BY_DO_CLOSE
protected:
Index DoSeek(Index offset, SeekOrigin origin) override;
Index DoRead(std::byte* buffer, Index offset, Index size) override;
Index DoWrite(const std::byte* buffer, Index offset, Index size) override;
void DoFlush() override;
private:
void DoClose();
private:
ProxyStreamHandlers handlers_;
};
} // namespace cru::io
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