mrpt::utils::CFileStream Class Reference

This CStream derived class allow using a file as a read/write binary stream, creating it if the file didn't exist. More...

#include <mrpt/utils/CFileStream.h>

Inheritance diagram for mrpt::utils::CFileStream:

List of all members.

Public Member Functions
	CFileStream (const std::string &fileName, TFileOpenModes mode=fomRead|fomWrite)
	Constructor and open a file.
	CFileStream ()
	Constructor.
bool	open (const std::string &fileName, TFileOpenModes mode=fomRead|fomWrite)
	Opens the file, returning true on success.
void	close ()
	Closes the file.
virtual	~CFileStream ()
	Destructor.
bool	fileOpenCorrectly ()
	Says if file was open successfully or not.
bool	checkEOF ()
	Will be true if EOF has been already reached.
size_t	Seek (long Offset, CStream::TSeekOrigin Origin=sFromBeginning)
	Method for moving to a specified position in the streamed resource.
size_t	getTotalBytesCount ()
	Method for getting the total number of bytes writen to buffer.
size_t	getPosition ()
	Method for getting the current cursor position, where 0 is the first byte and TotalBytesCount-1 the last one.
size_t	getPositionI ()
	The current Input cursor position, where 0 is the first byte.
size_t	getPositionO ()
	The current Input cursor position, where 0 is the first byte.
bool	readLine (std::string &str)
	Reads one string line from the file (until a new-line character).
Protected Member Functions
size_t	Read (void *Buffer, size_t Count)
	Method responsible for reading from the stream.
size_t	Write (const void *Buffer, size_t Count)
	Method responsible for writing to the stream.
Private Attributes
std::fstream	m_f
	The actual input file stream.

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Detailed Description

This CStream derived class allow using a file as a read/write binary stream, creating it if the file didn't exist.

The default behavior can be change to open as read, write, read and write,... in the constructor.

See also:

CStream, CFileInputStream, CFileOutputStrea, CFileGZInputStream

Definition at line 59 of file CFileStream.h.

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Constructor & Destructor Documentation

mrpt::utils::CFileStream::CFileStream	(	const std::string &	fileName,
		TFileOpenModes	mode = fomRead|fomWrite
	)

Constructor and open a file.

Parameters:

	fileName	The file to be open in this stream
	mode	The open mode: can be an or'd conbination of different values.

Exceptions:

std::exception

On error creating or accessing the file. By default the file is opened for open and write and created if not found.

mrpt::utils::CFileStream::CFileStream

(

)

Constructor.

virtual mrpt::utils::CFileStream::~CFileStream

(

)

[virtual]

Destructor.

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Member Function Documentation

bool mrpt::utils::CFileStream::checkEOF

(

)

Will be true if EOF has been already reached.

void mrpt::utils::CFileStream::close

(

)

Closes the file.

bool mrpt::utils::CFileStream::fileOpenCorrectly

(

)

Says if file was open successfully or not.

size_t mrpt::utils::CFileStream::getPosition

(

)

[virtual]

Method for getting the current cursor position, where 0 is the first byte and TotalBytesCount-1 the last one.

Implements mrpt::utils::CStream.

size_t mrpt::utils::CFileStream::getPositionI

(

)

The current Input cursor position, where 0 is the first byte.

size_t mrpt::utils::CFileStream::getPositionO

(

)

The current Input cursor position, where 0 is the first byte.

size_t mrpt::utils::CFileStream::getTotalBytesCount

(

)

[virtual]

Method for getting the total number of bytes writen to buffer.

Implements mrpt::utils::CStream.

bool mrpt::utils::CFileStream::open	(	const std::string &	fileName,
		TFileOpenModes	mode = fomRead|fomWrite
	)

Opens the file, returning true on success.

Parameters:

	fileName	The file to be open in this stream
	mode	The open mode: can be an or'd conbination of different values. By default the file is opened for open and write and created if not found.

size_t mrpt::utils::CFileStream::Read	(	void *	Buffer,
		size_t	Count
	)			[protected, virtual]

Method responsible for reading from the stream.

Implements mrpt::utils::CStream.

bool mrpt::utils::CFileStream::readLine

(

std::string &

str

)

Reads one string line from the file (until a new-line character).

Returns:

true if a line has been read, false on EOF or error.

size_t mrpt::utils::CFileStream::Seek	(	long	Offset,
		CStream::TSeekOrigin	Origin = sFromBeginning
	)			[virtual]

Method for moving to a specified position in the streamed resource.

See documentation of CStream::Seek

Implements mrpt::utils::CStream.

size_t mrpt::utils::CFileStream::Write	(	const void *	Buffer,
		size_t	Count
	)			[protected, virtual]

Method responsible for writing to the stream.

Write attempts to write up to Count bytes to Buffer, and returns the number of bytes actually written.

Implements mrpt::utils::CStream.

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Member Data Documentation

std::fstream mrpt::utils::CFileStream::m_f [private]

The actual input file stream.

Definition at line 74 of file CFileStream.h.