FileStream.hpp

//
//  Copyright PHOENIX CONTACT Electronics GmbH
//
#pragma once
#include "Arp/System/Core/Arp.h"
#include "Arp/System/Commons/Io/Stream.hpp"
#include "Arp/System/Commons/Io/FileMode.hpp"
#include "Arp/System/Commons/Io/FileAccess.hpp"

// forwards
namespace Arp { namespace System { namespace Ve
{
class IFileService;
}}}

namespace Arp { namespace System { namespace Commons { namespace Io
{

class FileStream : public Stream
{
public: // typedefs/usings
    using IFileService = Arp::System::Ve::IFileService;

public: // construction/destruction

    FileStream(const String& path, FileMode mode);

    FileStream(const String& path, FileMode mode, FileAccess access);

    FileStream(const FileStream& arg) = delete;

    FileStream& operator=(const FileStream& arg) = delete;

    virtual ~FileStream(void);

public: // setter/getter operations

    boolean CanRead(void) override;

    boolean CanWrite(void) override;

    boolean CanSeek(void) override;

    size_t GetLength(void) override;

    void SetLength(size_t length) override;

    size_t GetPosition(void) override;

    void SetPosition(size_t position) override;


public: // operations

    void Flush(void) override;

    size_t Seek(size_t offset, SeekOrigin origin) override;

    size_t Read(byte* pBuffer, size_t bufferSize, size_t offset, size_t count) override;

    void Write(const byte* pBuffer, size_t bufferSize, size_t offset, size_t count) override;

protected: // operations
    void InternalDispose(void) override;

private: // methods
    void InternalConstructor(const String& path, FileMode mode, FileAccess access);

private: // fields
    // flags storing internal status bits
    boolean canRead;
    boolean canWrite;
    boolean canSeek;
    // containing path and filename including extension
    String pathName;
    // native FileStream object providing system dependent part of implementation
    IFileService* pFileService;
};

// inline methods of class FileStream

inline FileStream::FileStream(const String& path, FileMode mode)
    : canRead(false), canWrite(false), canSeek(false), pathName(""), pFileService(nullptr)
{
    this->InternalConstructor(path, mode, FileAccess::ReadWrite);
}

inline FileStream::FileStream(const String& path, FileMode mode, FileAccess access)
    : canRead(false), canWrite(false), canSeek(false), pathName(""), pFileService(nullptr)
{
    this->InternalConstructor(path, mode, access);
}

}}}} // end of namespace Arp::System::Commons::Io