mrpt::utils::CFileInputStream Class Reference

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Detailed Description

This CStream derived class allow using a file as a read-only, binary stream.

See also:

CStream, CFileStream, CFileGZInputStream

Definition at line 46 of file CFileInputStream.h.

#include <mrpt/utils/CFileInputStream.h>

Inheritance diagram for mrpt::utils::CFileInputStream:

List of all members.

Public Member Functions
	CFileInputStream (const std::string &fileName)
	Constructor.
	CFileInputStream ()
	Default constructor.
bool	open (const std::string &fileName)
	Open a file for reading.
void	close ()
	Close the stream.
virtual	~CFileInputStream ()
	Destructor.
bool	fileOpenCorrectly ()
	Says if file was open successfully or not.
bool	checkEOF ()
	Will be true if EOF has been already reached.
uint64_t	Seek (long Offset, CStream::TSeekOrigin Origin=sFromBeginning)
	Method for moving to a specified position in the streamed resource.
uint64_t	getTotalBytesCount ()
	Method for getting the total number of bytes in the buffer.
uint64_t	getPosition ()
	Method for getting the current cursor position, where 0 is the first byte and TotalBytesCount-1 the last one.
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::ifstream	m_if
	The actual input file stream.

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Constructor & Destructor Documentation

mrpt::utils::CFileInputStream::CFileInputStream

(

const std::string &

fileName )

Constructor.

Parameters:

fileName

The file to be open in this stream

Exceptions:

std::exception

On error trying to open the file.

mrpt::utils::CFileInputStream::CFileInputStream

(

)

Default constructor.

virtual mrpt::utils::CFileInputStream::~CFileInputStream

(

)

[virtual]

Destructor.

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Member Function Documentation

bool mrpt::utils::CFileInputStream::checkEOF

(

)

Will be true if EOF has been already reached.

void mrpt::utils::CFileInputStream::close

(

)

Close the stream.

bool mrpt::utils::CFileInputStream::fileOpenCorrectly

(

)

Says if file was open successfully or not.

uint64_t mrpt::utils::CFileInputStream::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.

uint64_t mrpt::utils::CFileInputStream::getTotalBytesCount

(

)

[virtual]

Method for getting the total number of bytes in the buffer.

Implements mrpt::utils::CStream.

bool mrpt::utils::CFileInputStream::open

(

const std::string &

fileName )

Open a file for reading.

Parameters:

fileName

The file to be open in this stream

Returns:

true on success.

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

Method responsible for reading from the stream.

Implements mrpt::utils::CStream.

bool mrpt::utils::CFileInputStream::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.

uint64_t mrpt::utils::CFileInputStream::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::CFileInputStream::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::ifstream mrpt::utils::CFileInputStream::m_if [private]

The actual input file stream.

Definition at line 59 of file CFileInputStream.h.