FileStream.h

/*********************************************************************** Author: Zihan Chen (vczh) Licensed under https://github.com/vczh-libraries/License ***********************************************************************/

#ifndef VCZH_STREAM_FILESTREAM

#define VCZH_STREAM_FILESTREAM

#include <stdio.h>

#include "Interfaces.h"

namespace

{

namespace

stream

{

/// <summary>A file stream. If the given file name is not working, the stream could be unavailable.</summary>

class

FileStream

public

Object

public

virtual

IStream

{

public

/// <summary>Access to the file.</summary>

enum

AccessRight

{

/// <summary>The file is opened to read, making this stream readable, seekable and finite.</summary>

ReadOnly

/// <summary>The file is opened to write, making this stream writable.</summary>

WriteOnly

/// <summary>The file is opened to both read and write, making this stream readable, seekable and writable.</summary>

ReadWrite

};

protected

AccessRight

accessRight

;

FILE

file

;

public

/// <summary>Create a file stream from a given file name.</summary>

/// <param name="fileName">The file to operate.</param>

/// <param name="_accessRight">Expected operations on the file.</param>

FileStream

(

const

WString

fileName

AccessRight

_accessRight

);

FileStream

();

bool

CanRead

()

const

;

bool

CanWrite

()

const

;

bool

CanSeek

()

const

;

bool

CanPeek

()

const

;

bool

IsLimited

()

const

;

bool

IsAvailable

()

const

;

void

();

pos_t

Position

()

const

;

pos_t

Size

()

const

;

void

Seek

(

pos_t

_size

);

void

SeekFromBegin

(

pos_t

_size

);

void

SeekFromEnd

(

pos_t

_size

);

vint

Read

(

void

_buffer

vint

_size

);

vint

Write

(

void

_buffer

vint

_size

);

vint

Peek

(

void

_buffer

vint

_size

); }; } }

#endif