library/cpp/blockcodecs/core/stream.h


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#pragma once 
 
#include <util/stream/walk.h> 
#include <util/stream/input.h> 
#include <util/stream/output.h> 
#include <util/stream/zerocopy.h> 
#include <util/generic/buffer.h> 
 
namespace NBlockCodecs { 
    struct ICodec;
 
    class TCodedOutput: public IOutputStream {
    public: 
        TCodedOutput(IOutputStream* out, const ICodec* c, size_t bufLen);
        ~TCodedOutput() override;
 
    private: 
        void DoWrite(const void* buf, size_t len) override;
        void DoFlush() override;
        void DoFinish() override;
 
        bool FlushImpl(); 
 
    private: 
        const ICodec* C_; 
        TBuffer D_; 
        TBuffer O_; 
        IOutputStream* S_;
    }; 
 
    class TDecodedInput: public IWalkInput {
    public: 
        TDecodedInput(IInputStream* in);
        TDecodedInput(IInputStream* in, const ICodec* codec); 
 
        ~TDecodedInput() override;
 
    private: 
        size_t DoUnboundedNext(const void** ptr) override;
 
    private: 
        TBuffer D_; 
        IInputStream* S_;
        const ICodec* C_; 
    }; 
}