Detailed Description

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

See also: CStream, CFileStream, CFileGZOutputStream

Examples: serialization_stl/test.cpp.

Definition at line 24 of file io/CFileOutputStream.h.

#include <mrpt/io/CFileOutputStream.h>

Inheritance diagram for mrpt::io::CFileOutputStream:

Public Types
enum	TSeekOrigin { sFromBeginning = 0, sFromCurrent = 1, sFromEnd = 2 }
	Used in CStream::Seek. More...

Public Member Functions
	CFileOutputStream (const std::string &fileName, bool append=false)
	Constructor. More...

	CFileOutputStream ()
	Default constructor. More...

	CFileOutputStream (const CFileOutputStream &)=delete

CFileOutputStream &	operator= (const CFileOutputStream &)=delete

bool	open (const std::string &fileName, bool append=false)
	Open the given file for write. More...

void	close ()
	Close the stream. More...

virtual	~CFileOutputStream ()
	Destructor. More...

bool	fileOpenCorrectly () const
	Returns true if the file was open without errors. More...

bool	is_open ()
	Returns true if the file was open without errors. More...

uint64_t	Seek (int64_t Offset, CStream::TSeekOrigin Origin=sFromBeginning) override
	Introduces a pure virtual method for moving to a specified position in the streamed resource. More...

uint64_t	getTotalBytesCount () const override
	Method for getting the total number of bytes writen to buffer. More...

uint64_t	getPosition () const override
	Method for getting the current cursor position, where 0 is the first byte and TotalBytesCount-1 the last one. More...

size_t	Read (void *Buffer, size_t Count) override
	Introduces a pure virtual method responsible for reading from the stream. More...

size_t	Write (const void *Buffer, size_t Count) override
	Introduces a pure virtual method responsible for writing to the stream. More...

virtual size_t	ReadBufferImmediate (void *Buffer, size_t Count)
	Reads a block of bytes from the stream into Buffer, and returns the amound of bytes actually read, without waiting for more extra bytes to arrive (just those already enqued in the stream). More...

virtual int	printf (const char *fmt,...) MRPT_printf_format_check(2
	Writes a string to the stream in a textual form. More...

template<typename CONTAINER_TYPE >
virtual int void	printf_vector (const char *fmt, const CONTAINER_TYPE &V, char separator=',')
	Prints a vector in the format [A,B,C,...] using CStream::printf, and the fmt string for each vector element `T`. More...

bool	getline (std::string &out_str)
	Reads from the stream until a ' ' character is found ('\r' characters are ignored). More...

Private Attributes
std::ofstream	m_of
	The actual output file stream. More...

Member Enumeration Documentation

◆ TSeekOrigin

enum mrpt::io::CStream::TSeekOrigin

inherited

Used in CStream::Seek.

Enumerator
sFromBeginning
sFromCurrent
sFromEnd

Definition at line 34 of file io/CStream.h.

Constructor & Destructor Documentation

◆ CFileOutputStream() [1/3]

CFileOutputStream::CFileOutputStream	(	const std::string &	fileName,
		bool	append = `false`
	)

Constructor.

Parameters

fileName	The file to be open in this stream
append	If set to true, the file will be opened for writing and the current cursor position set at the end of the file. Otherwise, previous contents will be lost.

Exceptions

std::exception if the file cannot be opened.

Definition at line 18 of file CFileOutputStream.cpp.

References MRPT_END, MRPT_START, open(), and THROW_EXCEPTION_FMT.

◆ CFileOutputStream() [2/3]

CFileOutputStream::CFileOutputStream ( )

Default constructor.

Definition at line 30 of file CFileOutputStream.cpp.

◆ CFileOutputStream() [3/3]

mrpt::io::CFileOutputStream::CFileOutputStream ( const CFileOutputStream & )

delete

◆ ~CFileOutputStream()

CFileOutputStream::~CFileOutputStream ( )

virtual

Destructor.

Definition at line 48 of file CFileOutputStream.cpp.

References close().

Member Function Documentation

◆ close()

void CFileOutputStream::close ( )

Close the stream.

Definition at line 43 of file CFileOutputStream.cpp.

References m_of.

Referenced by open(), and ~CFileOutputStream().

◆ fileOpenCorrectly()

bool CFileOutputStream::fileOpenCorrectly ( ) const

Returns true if the file was open without errors.

Definition at line 112 of file CFileOutputStream.cpp.

References m_of.

Referenced by mrpt::hwdrivers::CGPSInterface::doProcess(), getTotalBytesCount(), and is_open().

◆ getline()

bool CStream::getline ( std::string & out_str )

inherited

Reads from the stream until a '
' character is found ('\r' characters are ignored).

Returns: false on EOF or any other read error.

Definition at line 69 of file CStream.cpp.

◆ getPosition()

uint64_t CFileOutputStream::getPosition ( ) const

overridevirtual

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

Implements mrpt::io::CStream.

Definition at line 103 of file CFileOutputStream.cpp.

References m_of.

Referenced by Seek().

◆ getTotalBytesCount()

uint64_t CFileOutputStream::getTotalBytesCount ( ) const

overridevirtual

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

Implements mrpt::io::CStream.

Definition at line 90 of file CFileOutputStream.cpp.

References fileOpenCorrectly(), and m_of.

◆ is_open()

bool mrpt::io::CFileOutputStream::is_open ( )

inline

Returns true if the file was open without errors.

Definition at line 65 of file io/CFileOutputStream.h.

References fileOpenCorrectly().

◆ open()

bool CFileOutputStream::open	(	const std::string &	fileName,
		bool	append = `false`
	)

Open the given file for write.

Parameters

fileName	The file to be open in this stream
append	If set to true, the file will be opened for writing and the current cursor position set at the end of the file. Otherwise, previous contents will be lost.

See also: fileOpenCorrectly

Returns: true on success.

Definition at line 31 of file CFileOutputStream.cpp.

References close(), and m_of.

Referenced by CFileOutputStream(), and mrpt::hwdrivers::CGPSInterface::doProcess().

◆ operator=()

CFileOutputStream& mrpt::io::CFileOutputStream::operator= ( const CFileOutputStream & )

delete

◆ printf()

int CStream::printf	(	const char *	fmt,
			...
	)

virtualinherited

Writes a string to the stream in a textual form.

See also: CStdOutStream

Definition at line 30 of file CStream.cpp.

References MRPT_END, MRPT_START, and vsnprintf.

Referenced by mrpt::hmtslam::CTopLCDetector_GridMatching::computeTopologicalObservationModel(), and mrpt::io::CStream::printf_vector().

◆ printf_vector()

template<typename CONTAINER_TYPE >

virtual int void mrpt::io::CStream::printf_vector	(	const char *	fmt,
		const CONTAINER_TYPE &	V,
		char	separator = `','`
	)

inlineinherited

Prints a vector in the format [A,B,C,...] using CStream::printf, and the fmt string for each vector element T.

Template Parameters

CONTAINER_TYPE can be any vector<T>, deque<T> or alike.

Definition at line 104 of file io/CStream.h.

References mrpt::io::CStream::printf().

Referenced by mrpt::hmtslam::CTopLCDetector_GridMatching::computeTopologicalObservationModel().

◆ Read()

size_t CFileOutputStream::Read	(	void *	Buffer,
		size_t	Count
	)

overridevirtual

Introduces a pure virtual method responsible for reading from the stream.

Implements mrpt::io::CStream.

Definition at line 49 of file CFileOutputStream.cpp.

References MRPT_UNUSED_PARAM, and THROW_EXCEPTION.

◆ ReadBufferImmediate()

virtual size_t mrpt::io::CStream::ReadBufferImmediate	(	void *	Buffer,
		size_t	Count
	)

inlinevirtualinherited

Reads a block of bytes from the stream into Buffer, and returns the amound of bytes actually read, without waiting for more extra bytes to arrive (just those already enqued in the stream).

Note that this method will fallback to ReadBuffer() in most CStream classes but in some hardware-related classes.

Exceptions

std::exception On any error, or if ZERO bytes are read.

Reimplemented in mrpt::comms::CInterfaceFTDI.

Definition at line 64 of file io/CStream.h.

References mrpt::io::CStream::Read().

◆ Seek()

uint64_t CFileOutputStream::Seek	(	int64_t	Offset,
		CStream::TSeekOrigin	Origin = `sFromBeginning`
	)

overridevirtual

Introduces a pure virtual method for moving to a specified position in the streamed resource.

he Origin parameter indicates how to interpret the Offset parameter. Origin should be one of the following values:

sFromBeginning (Default) Offset is from the beginning of the resource. Seek moves to the position Offset. Offset must be >= 0.
sFromCurrent Offset is from the current position in the resource. Seek moves to Position + Offset.
sFromEnd Offset is from the end of the resource. Offset must be <= 0 to indicate a number of bytes before the end of the file.
Returns
Seek returns the new value of the Position property.

Implements mrpt::io::CStream.

Definition at line 64 of file CFileOutputStream.cpp.

References getPosition(), m_of, mrpt::io::CStream::sFromBeginning, mrpt::io::CStream::sFromCurrent, mrpt::io::CStream::sFromEnd, and THROW_EXCEPTION.

◆ Write()

size_t CFileOutputStream::Write	(	const void *	Buffer,
		size_t	Count
	)

overridevirtual

Introduces a pure 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::io::CStream.

Definition at line 56 of file CFileOutputStream.cpp.

References m_of.

Referenced by mrpt::hwdrivers::CGPSInterface::doProcess(), and mrpt::io::CMemoryStream::saveBufferToFile().

Member Data Documentation

◆ m_of

std::ofstream mrpt::io::CFileOutputStream::m_of

private

The actual output file stream.

Definition at line 28 of file io/CFileOutputStream.h.

Referenced by close(), fileOpenCorrectly(), getPosition(), getTotalBytesCount(), open(), Seek(), and Write().

Detailed Description

Public Types

Public Member Functions

Private Attributes

Member Enumeration Documentation

◆ TSeekOrigin

Constructor & Destructor Documentation

◆ CFileOutputStream() [1/3]

◆ CFileOutputStream() [2/3]

◆ CFileOutputStream() [3/3]

◆ ~CFileOutputStream()

Member Function Documentation

◆ close()

◆ fileOpenCorrectly()

◆ getline()

◆ getPosition()

◆ getTotalBytesCount()

◆ is_open()

◆ open()

◆ operator=()

◆ printf()

◆ printf_vector()

◆ Read()

◆ ReadBufferImmediate()

◆ Seek()

◆ Write()

Member Data Documentation

◆ m_of