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#pragma once
#include <base/types.h>
#include <optional>
namespace DB
{
class ReadBuffer;
class WithFileSize
{
public:
virtual size_t getFileSize() = 0;
virtual ~WithFileSize() = default;
};
bool isBufferWithFileSize(const ReadBuffer & in);
size_t getFileSizeFromReadBuffer(ReadBuffer & in);
/// Return nullopt if couldn't find out file size;
std::optional<size_t> tryGetFileSizeFromReadBuffer(ReadBuffer & in);
size_t getDataOffsetMaybeCompressed(const ReadBuffer & in);
}
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