RawFile.h

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#pragma once
#include "catapult/types.h"
#include <string>
 
namespace catapult { namespace io {
 
    enum class OpenMode {
        Read_Only,
 
        Read_Write,
 
        Read_Append,
    };
 
    enum class LockMode {
        None,
 
        File
    };
 
    class RawFile final : public utils::MoveOnly {
    public:
        RawFile(const std::string& pathname, OpenMode mode, LockMode lockMode = LockMode::File);
 
        RawFile(RawFile&& rhs) = default;
 
        RawFile& operator=(RawFile&& rhs) = delete;
 
    public:
        void write(const RawBuffer& dataBuffer);
 
        void seek(uint64_t position);
 
        void read(const MutableRawBuffer& dataBuffer);
 
        uint64_t size() const;
 
        uint64_t position() const;
 
    private:
        class FileDescriptorHolder final {
        public:
            explicit FileDescriptorHolder(int fd);
            FileDescriptorHolder(FileDescriptorHolder&& rhs);
            FileDescriptorHolder& operator=(FileDescriptorHolder&& rhs) = delete;
            ~FileDescriptorHolder();
 
            bool isValid() const;
 
            int raw() const;
            int& rawRef();
 
        private:
            int m_fd;
        };
 
        const std::string m_pathname;
        FileDescriptorHolder m_fd;
        uint64_t m_fileSize;
        uint64_t m_position;
    };
}}