StreamFileReader.h

#pragma once
 
#include <cstdint>
#include <fstream>
#include <iostream>
 
// BIG_FILE_SIZE must be greater then FILE_BLOCK_SIZE
#define FILE_BLOCK_SIZE 4096
#define BIG_FILE_SIZE 10485760
 
namespace mvlt
{
    class StreamFileReader
    {
    private:
        // Input file variable
        std::ifstream File;
 
        // Input file size
        std::streamsize FileSize = 0;
 
        // Position in file
        std::streamsize FilePos = 0;
 
        // Position if file chunk
        std::uint16_t ChunkPos = 1;
 
        // Current char
        char Char = 0;
 
        // Next char
        char NextChar = 0;
 
        // File chunk
        char DataChunk[FILE_BLOCK_SIZE] = {0};
 
        // Pointer to store little files
        char* Data = nullptr;
 
    public:
        StreamFileReader() noexcept;
 
        StreamFileReader(const StreamFileReader& other) noexcept = delete;
 
        StreamFileReader(StreamFileReader&& other) noexcept = delete;
 
        explicit StreamFileReader(const std::string& fileName) noexcept;
 
        StreamFileReader& operator=(const StreamFileReader& other) noexcept = delete;
 
        StreamFileReader& operator=(StreamFileReader&& other) noexcept = delete;
 
        bool Open(const std::string& fileName) noexcept;
 
        bool IsOpen() const noexcept;
 
        bool IsEnd() const noexcept;
 
        std::size_t GetFileSize() const noexcept;
 
        std::size_t GetCurrentPos() const noexcept;
 
        char GetChar() const noexcept;
 
        char GetNextChar() const noexcept;
 
        bool Move() noexcept;
 
        void Close() noexcept;
 
        ~StreamFileReader() noexcept;
    };
 
}