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#pragma once
#include <util/generic/vector.h>
#include <util/stream/output.h>
template <typename T>
inline void WriteBin(IOutputStream* out, typename TTypeTraits<T>::TFuncParam t) {
out->Write(&t, sizeof(T));
}
class TChunkedDataWriter: public IOutputStream {
public:
TChunkedDataWriter(IOutputStream& slave);
~TChunkedDataWriter() override;
void NewBlock();
template <typename T>
inline void WriteBinary(typename TTypeTraits<T>::TFuncParam t) {
this->Write(&t, sizeof(T));
}
void WriteFooter();
size_t GetCurrentBlockOffset() const;
size_t GetBlockCount() const;
protected:
void DoWrite(const void* buf, size_t len) override {
Slave.Write(buf, len);
Offset += len;
}
private:
static inline size_t PaddingSize(size_t size, size_t boundary) noexcept {
const size_t boundaryViolation = size % boundary;
return boundaryViolation == 0 ? 0 : boundary - boundaryViolation;
}
inline void Pad(size_t boundary) {
const size_t newOffset = Offset + PaddingSize(Offset, boundary);
while (Offset < newOffset) {
Write('\0');
}
}
private:
static const ui64 Version = 1;
IOutputStream& Slave;
size_t Offset;
TVector<ui64> Offsets;
TVector<ui64> Lengths;
};
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