develop/ISeekableInputStream_8h_source.html

#pragma once


#include "IInputStream.h"


class ISeekableInputStream: public IInputStream {

public:

    virtual ~ISeekableInputStream() = default;


    virtual void seek(std::streamoff offset, std::ios::seekdir seekDir) = 0;


    virtual size_t tell() = 0;


    virtual bool isEof() = 0;


    size_t fileSize() {

        auto current = tell();

        seek(0, std::ios::end);

        auto size = tell();

        seek(current, std::ios::beg);

        return size;

    }


};


IInputStream
Represents an input stream.
Definition IInputStream.h:26

ISeekableInputStream
Represents an input stream with updating reading position.
Definition ISeekableInputStream.h:9

ISeekableInputStream::tell
virtual size_t tell()=0
return current reading position

ISeekableInputStream::fileSize
size_t fileSize()
return size of the stream
Definition ISeekableInputStream.h:34

ISeekableInputStream::isEof
virtual bool isEof()=0
returns true if end of stream has been reached

ISeekableInputStream::seek
virtual void seek(std::streamoff offset, std::ios::seekdir seekDir)=0
change reading position, a way of changing depends on seekDir parameter