mrpt::utils::CFileStream Class Reference

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 39 of file CFileStream.h.

#include <mrpt/utils/CFileStream.h>

Inheritance diagram for mrpt::utils::CFileStream:

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

Public Member Functions
	CFileStream (const std::string &fileName, TFileOpenModes mode=fomRead|fomWrite)
	Constructor and open a file. More...
	CFileStream ()
	Constructor. More...
virtual	~CFileStream ()
	Destructor. More...
bool	open (const std::string &fileName, TFileOpenModes mode=fomRead|fomWrite)
	Opens the file, returning true on success. More...
void	close ()
	Closes the file. More...
bool	fileOpenCorrectly ()
	Returns true if the file was open without errors. More...
bool	is_open ()
	Returns true if the file was open without errors. More...
bool	checkEOF ()
	Will be true if EOF has been already reached. More...
void	clearError ()
	Resets stream error status bits (e.g. after an EOF) More...
uint64_t	Seek (int64_t Offset, CStream::TSeekOrigin Origin=sFromBeginning) MRPT_OVERRIDE
	Method for moving to a specified position in the streamed resource. More...
uint64_t	getTotalBytesCount () MRPT_OVERRIDE
	Method for getting the total number of bytes writen to buffer. More...
uint64_t	getPosition () MRPT_OVERRIDE
	Method for getting the current cursor position, where 0 is the first byte and TotalBytesCount-1 the last one. More...
uint64_t	getPositionI ()
	The current Input cursor position, where 0 is the first byte. More...
uint64_t	getPositionO ()
	The current Input cursor position, where 0 is the first byte. More...
bool	readLine (std::string &str)
	Reads one string line from the file (until a new-line character) More...
size_t	ReadBuffer (void *Buffer, size_t Count)
	Reads a block of bytes from the stream into Buffer. More...
template<typename T >
size_t	ReadBufferFixEndianness (T *ptr, size_t ElementCount)
	Reads a sequence of elemental datatypes, taking care of reordering their bytes from the MRPT stream standard (little endianness) to the format of the running architecture. 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...
void	WriteBuffer (const void *Buffer, size_t Count)
	Writes a block of bytes to the stream from Buffer. More...
template<typename T >
void	WriteBufferFixEndianness (const T *ptr, size_t ElementCount)
	Writes a sequence of elemental datatypes, taking care of reordering their bytes from the running architecture to MRPT stream standard (little endianness). More...
void	WriteObject (const CSerializable *o)
	Writes an object to the stream. More...
CSerializablePtr	ReadObject ()
	Reads an object from stream, its class determined at runtime, and returns a smart pointer to the object. More...
void	ReadObject (CSerializable *existingObj)
	Reads an object from stream, where its class must be the same as the supplied object, where the loaded object will be stored in. More...
CStream &	operator<< (const CSerializablePtr &pObj)
	Write an object to a stream in the binary MRPT format. More...
CStream &	operator<< (const CSerializable &obj)
	Write an object to a stream in the binary MRPT format. More...
CStream &	operator>> (CSerializablePtr &pObj)
CStream &	operator>> (CSerializable &obj)
template<typename STORED_TYPE , typename CAST_TO_TYPE >
void	ReadAsAndCastTo (CAST_TO_TYPE &read_here)
	Read a value from a stream stored in a type different of the target variable, making the conversion via static_cast. 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...
void	sendMessage (const utils::CMessage &msg)
	Send a message to the device. More...
bool	receiveMessage (utils::CMessage &msg)
	Tries to receive a message from the device. More...
bool	getline (std::string &out_str)
	Reads from the stream until a ' ' character is found ('' characters are ignored). More...

Protected Member Functions
size_t	Read (void *Buffer, size_t Count) MRPT_OVERRIDE
	Introduces a pure virtual method responsible for reading from the stream. More...
size_t	Write (const void *Buffer, size_t Count) MRPT_OVERRIDE
	Introduces a pure virtual method responsible for writing to the stream. More...
template<bool EXISTING_OBJ>
void	internal_ReadObject (CSerializablePtr &newObj, CSerializable *existingObj=NULL)
	A common template code for both versions of CStream::ReadObject() More...

Private Attributes
std::fstream	m_f
	The actual input file stream. More...

Member Enumeration Documentation

TSeekOrigin

enum mrpt::utils::CStream::TSeekOrigin

inherited

Used in CStream::Seek.

Enumerator
sFromBeginning
sFromCurrent
sFromEnd

Definition at line 42 of file CStream.h.

Constructor & Destructor Documentation

CFileStream() [1/2]

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.

Definition at line 33 of file CFileStream.cpp.

References mrpt::utils::fomAppend, mrpt::utils::fomRead, mrpt::utils::fomWrite, m_f, MRPT_END, MRPT_START, and THROW_EXCEPTION_FMT.

CFileStream() [2/2]

CFileStream::CFileStream

(

)

Constructor.

Definition at line 26 of file CFileStream.cpp.

~CFileStream()

CFileStream::~CFileStream ( )

virtual

Destructor.

Definition at line 85 of file CFileStream.cpp.

References m_f.

Member Function Documentation

checkEOF()

bool CFileStream::checkEOF

(

)

Will be true if EOF has been already reached.

Definition at line 207 of file CFileStream.cpp.

References m_f.

clearError()

void CFileStream::clearError

(

)

Resets stream error status bits (e.g. after an EOF)

Definition at line 214 of file CFileStream.cpp.

References m_f.

close()

void CFileStream::close

(

)

Closes the file.

Definition at line 77 of file CFileStream.cpp.

References m_f.

fileOpenCorrectly()

bool CFileStream::fileOpenCorrectly

(

)

Returns true if the file was open without errors.

Definition at line 186 of file CFileStream.cpp.

References m_f.

Referenced by getTotalBytesCount().

getline()

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

inherited

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

Returns

false on EOF or any other read error.

Definition at line 680 of file CStream.cpp.

getPosition()

uint64_t 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.

Definition at line 156 of file CFileStream.cpp.

References m_f.

Referenced by getTotalBytesCount(), and Seek().

getPositionI()

uint64_t CFileStream::getPositionI

(

)

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

Definition at line 166 of file CFileStream.cpp.

References m_f.

getPositionO()

uint64_t CFileStream::getPositionO

(

)

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

Definition at line 176 of file CFileStream.cpp.

References m_f.

getTotalBytesCount()

uint64_t CFileStream::getTotalBytesCount ( )

virtual

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

Implements mrpt::utils::CStream.

Definition at line 143 of file CFileStream.cpp.

References fileOpenCorrectly(), getPosition(), Seek(), and mrpt::utils::CStream::sFromEnd.

internal_ReadObject()

template<bool EXISTING_OBJ>

void CStream::internal_ReadObject ( CSerializablePtr &  newObj, CSerializable *  existingObj = NULL  )

protectedinherited

A common template code for both versions of CStream::ReadObject()

• EXISTING_OBJ=true -> read in the object passed as argument
• EXISTING_OBJ=false -> build a new object and return it

Definition at line 357 of file CStream.cpp.

References ASSERT_, mrpt::utils::TRuntimeClassId::className, mrpt::utils::TRuntimeClassId::createObject(), mrpt::utils::findRegisteredClass(), mrpt::format(), mrpt::utils::CSerializable::GetRuntimeClass(), mrpt::utils::registerAllPendingClasses(), SERIALIZATION_END_FLAG, THROW_EXCEPTION, THROW_EXCEPTION_FMT, THROW_STACKED_EXCEPTION_CUSTOM_MSG2, THROW_TYPED_EXCEPTION, and version.

is_open()

bool mrpt::utils::CFileStream::is_open ( )

inline

Returns true if the file was open without errors.

Definition at line 66 of file CFileStream.h.

open()

bool 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.

Definition at line 54 of file CFileStream.cpp.

References mrpt::utils::fomAppend, mrpt::utils::fomRead, mrpt::utils::fomWrite, m_f, MRPT_END, and MRPT_START.

operator<<() [1/2]

CStream & CStream::operator<< ( const CSerializablePtr &  pObj )

inherited

Write an object to a stream in the binary MRPT format.

Definition at line 211 of file CStream.cpp.

operator<<() [2/2]

CStream & CStream::operator<< ( const CSerializable &  obj )

inherited

Write an object to a stream in the binary MRPT format.

Definition at line 218 of file CStream.cpp.

operator>>() [1/2]

CStream & CStream::operator>> ( CSerializablePtr &  pObj )

inherited

Definition at line 224 of file CStream.cpp.

operator>>() [2/2]

CStream & CStream::operator>> ( CSerializable &  obj )

inherited

Definition at line 230 of file CStream.cpp.

printf()

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

virtualinherited

Writes a string to the stream in a textual form.

See also

CStdOutStream

Definition at line 507 of file CStream.cpp.

References MRPT_END, MRPT_START, and vsnprintf.

Referenced by mrpt::hmtslam::CTopLCDetector_GridMatching::computeTopologicalObservationModel(), mrpt::utils::TMatchingPairList::dumpToFile(), mrpt::obs::gnss::Message_NMEA_GGA::dumpToStream(), mrpt::obs::gnss::Message_TOPCON_PZS::dumpToStream(), mrpt::obs::gnss::Message_TOPCON_SATS::dumpToStream(), mrpt::obs::gnss::Message_NMEA_GLL::dumpToStream(), mrpt::obs::gnss::Message_NMEA_RMC::dumpToStream(), mrpt::obs::CObservationGPS::dumpToStream(), mrpt::obs::gnss::Message_NMEA_VTG::dumpToStream(), mrpt::obs::gnss::Message_NV_OEM6_GENERIC_FRAME::dumpToStream(), mrpt::obs::gnss::Message_NMEA_ZDA::dumpToStream(), mrpt::obs::gnss::Message_NV_OEM6_GENERIC_SHORT_FRAME::dumpToStream(), mrpt::obs::gnss::Message_NV_OEM6_RANGECMP::dumpToStream(), mrpt::obs::gnss::Message_NV_OEM6_VERSION::dumpToStream(), mrpt::slam::TKLDParams::dumpToTextStream(), mrpt::maps::TMetricMapInitializer::dumpToTextStream(), mrpt::slam::CMetricMapBuilderICP::TConfigParams::dumpToTextStream(), mrpt::maps::CWirelessPowerGridMap2D::TInsertionOptions::dumpToTextStream(), mrpt::maps::CHeightGridMap2D_MRF::TInsertionOptions::dumpToTextStream(), mrpt::slam::CIncrementalMapPartitioner::TOptions::dumpToTextStream(), mrpt::slam::CICP::TConfigParams::dumpToTextStream(), mrpt::maps::CGasConcentrationGridMap2D::TInsertionOptions::dumpToTextStream(), mrpt::hmtslam::CTopLCDetector_FabMap::TOptions::dumpToTextStream(), mrpt::hmtslam::CTopLCDetector_GridMatching::TOptions::dumpToTextStream(), mrpt::slam::CMetricMapBuilderRBPF::TConstructionOptions::dumpToTextStream(), mrpt::graphslam::TUncertaintyPath< GRAPH_T >::dumpToTextStream(), mrpt::vision::CFeatureExtraction::TOptions::dumpToTextStream(), mrpt::maps::CReflectivityGridMap2D::TInsertionOptions::dumpToTextStream(), mrpt::utils::CLoadableOptions::dumpToTextStream(), mrpt::maps::COctoMapBase< octree_t, octree_node_t >::TInsertionOptions::dumpToTextStream(), mrpt::bayes::CParticleFilter::TParticleFilterOptions::dumpToTextStream(), mrpt::slam::CGridMapAligner::TConfigParams::dumpToTextStream(), mrpt::graphslam::TSlidingWindow::dumpToTextStream(), mrpt::maps::CHeightGridMap2D::TInsertionOptions::dumpToTextStream(), mrpt::slam::CRangeBearingKFSLAM2D::TOptions::dumpToTextStream(), mrpt::maps::CBeaconMap::TLikelihoodOptions::dumpToTextStream(), mrpt::maps::CMultiMetricMapPDF::TPredictionParams::dumpToTextStream(), mrpt::maps::CRandomFieldGridMap3D::TInsertionOptions::dumpToTextStream(), mrpt::maps::CBeaconMap::TInsertionOptions::dumpToTextStream(), mrpt::graphslam::deciders::CFixedIntervalsNRD< GRAPH_T >::TParams::dumpToTextStream(), mrpt::graphslam::deciders::CRangeScanOps< GRAPH_T >::TParams::dumpToTextStream(), mrpt::maps::COctoMapBase< octree_t, octree_node_t >::TLikelihoodOptions::dumpToTextStream(), mrpt::slam::CRangeBearingKFSLAM::TOptions::dumpToTextStream(), mrpt::graphslam::deciders::CICPCriteriaERD< GRAPH_T >::TParams::dumpToTextStream(), mrpt::graphslam::optimizers::CLevMarqGSO< GRAPH_T >::OptimizationParams::dumpToTextStream(), mrpt::maps::CPointsMap::TInsertionOptions::dumpToTextStream(), mrpt::vision::TStereoSystemParams::dumpToTextStream(), mrpt::graphslam::deciders::CICPCriteriaNRD< GRAPH_T >::TParams::dumpToTextStream(), mrpt::vision::CFeature::dumpToTextStream(), mrpt::maps::CLandmarksMap::TInsertionOptions::dumpToTextStream(), mrpt::maps::CPointsMap::TLikelihoodOptions::dumpToTextStream(), mrpt::graphslam::optimizers::CLevMarqGSO< GRAPH_T >::GraphVisualizationParams::dumpToTextStream(), mrpt::maps::CColouredPointsMap::TColourOptions::dumpToTextStream(), mrpt::maps::CLandmarksMap::TLikelihoodOptions::dumpToTextStream(), mrpt::maps::TSetOfMetricMapInitializers::dumpToTextStream(), mrpt::vision::TMatchingOptions::dumpToTextStream(), mrpt::maps::COccupancyGridMap2D::TInsertionOptions::dumpToTextStream(), mrpt::hmtslam::CHMTSLAM::TOptions::dumpToTextStream(), mrpt::maps::COccupancyGridMap2D::TLikelihoodOptions::dumpToTextStream(), mrpt::graphslam::deciders::CLoopCloserERD< GRAPH_T >::TLaserParams::dumpToTextStream(), mrpt::vision::TMultiResDescMatchOptions::dumpToTextStream(), mrpt::graphslam::deciders::CLoopCloserERD< GRAPH_T >::TLoopClosureParams::dumpToTextStream(), mrpt::vision::TMultiResDescOptions::dumpToTextStream(), mrpt::maps::CWirelessPowerGridMap2D::TMapDefinition::dumpToTextStream_map_specific(), mrpt::maps::CHeightGridMap2D_MRF::TMapDefinition::dumpToTextStream_map_specific(), mrpt::maps::CHeightGridMap2D::TMapDefinition::dumpToTextStream_map_specific(), mrpt::maps::CGasConcentrationGridMap2D::TMapDefinition::dumpToTextStream_map_specific(), mrpt::maps::CLandmarksMap::TMapDefinition::dumpToTextStream_map_specific(), mrpt::utils::CLoadableOptions::dumpVar_bool(), mrpt::utils::CLoadableOptions::dumpVar_double(), mrpt::utils::CLoadableOptions::dumpVar_float(), mrpt::utils::CLoadableOptions::dumpVar_int(), mrpt::utils::CLoadableOptions::dumpVar_string(), mrpt::synch::CCriticalSection::enter(), generic_dump_BESTPOS(), generic_dump_MARKTIME(), mrpt::maps::CRandomFieldGridMap2D::TInsertionOptionsCommon::internal_dumpToTextStream_common(), mrpt::synch::CCriticalSection::leave(), mrpt::slam::CRangeBearingKFSLAM2D::OnGetObservationsAndDataAssociation(), mrpt::maps::CRandomFieldGridMap3D::saveAsCSV(), mrpt::poses::CPoseInterpolatorBase< 3 >::saveInterpolatedToTextFile(), mrpt::utils::CTimeLogger::saveToCSVFile(), and mrpt::poses::CPoseInterpolatorBase< 3 >::saveToTextFile().

printf_vector()

template<typename CONTAINER_TYPE >

virtual int void mrpt::utils::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 208 of file CStream.h.

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

Read()

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

protectedvirtual

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

Implements mrpt::utils::CStream.

Definition at line 95 of file CFileStream.cpp.

References m_f.

ReadAsAndCastTo()

template<typename STORED_TYPE , typename CAST_TO_TYPE >

void mrpt::utils::CStream::ReadAsAndCastTo ( CAST_TO_TYPE &  read_here )

inlineinherited

Read a value from a stream stored in a type different of the target variable, making the conversion via static_cast.

Useful for coding backwards compatible de-serialization blocks

Definition at line 194 of file CStream.h.

ReadBuffer()

size_t CStream::ReadBuffer ( void *  Buffer, size_t  Count  )

inherited

Reads a block of bytes from the stream into Buffer.

Exceptions

std::exception

On any error, or if ZERO bytes are read.

Returns

The amound of bytes actually read.

Note

This method is endianness-dependent.

See also

ReadBufferImmediate ; Important, see: ReadBufferFixEndianness,

Definition at line 45 of file CStream.cpp.

References ASSERT_, and THROW_EXCEPTION.

Referenced by mrpt::hwdrivers::CHokuyoURG::assureBufferHasBytes(), mrpt::compress::zip::compress_gz_data_block(), mrpt::compress::zip::decompress(), mrpt::compress::zip::decompress_gz_file(), mrpt::hwdrivers::CGPSInterface::doProcess(), fill_input_buffer(), mrpt::system::loadBinaryFile(), mrpt::utils::CMemoryStream::loadBufferFromFile(), and mrpt::hwdrivers::CHokuyoURG::purgeBuffers().

ReadBufferFixEndianness()

template<typename T >

size_t mrpt::utils::CStream::ReadBufferFixEndianness ( T *  ptr, size_t  ElementCount  )

inlineinherited

Reads a sequence of elemental datatypes, taking care of reordering their bytes from the MRPT stream standard (little endianness) to the format of the running architecture.

Parameters

ElementCount	The number of elements (not bytes) to read.
ptr	A pointer to the first output element in an array (or std::vector<>, etc...).

Returns

The amound of bytes (not elements) actually read (under error situations, the last element may be invalid if the data stream abruptly ends). Example of usage:

uint32_t  N;
s >> N;
vector<float>  vec(N);
if (N)
  s.ReadBufferFixEndianness<float>(&vec[0],N);

Exceptions

std::exception

On any error, or if ZERO bytes are read.

See also

ReadBufferFixEndianness, ReadBuffer

Definition at line 95 of file CStream.h.

References mrpt::mrpt::utils::reverseBytesInPlace().

Referenced by mrpt::math::operator>>(), and triangle_readFromStream().

ReadBufferImmediate()

virtual size_t mrpt::utils::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::hwdrivers::CInterfaceFTDI.

Definition at line 113 of file CStream.h.

readLine()

bool 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

Definition at line 194 of file CFileStream.cpp.

References m_f.

ReadObject() [1/2]

CSerializablePtr CStream::ReadObject ( )

inherited

Reads an object from stream, its class determined at runtime, and returns a smart pointer to the object.

Exceptions

std::exception	On I/O error or undefined class.
mrpt::utils::CExceptionEOF	On an End-Of-File condition found at a correct place: an EOF that abruptly finishes in the middle of one object raises a plain std::exception instead.

Definition at line 486 of file CStream.cpp.

Referenced by mrpt::utils::mrpt_recv_from_zmq(), mrpt::utils::mrpt_recv_from_zmq_into(), mrpt::utils::OctetVectorToObject(), mrpt::nav::CAbstractPTGBasedReactive::performNavigationStep(), mrpt::utils::RawStringToObject(), mrpt::utils::StringToObject(), and TEST().

ReadObject() [2/2]

void CStream::ReadObject ( CSerializable *  existingObj )

inherited

Reads an object from stream, where its class must be the same as the supplied object, where the loaded object will be stored in.

Exceptions

std::exception	On I/O error or different class found.
mrpt::utils::CExceptionEOF	On an End-Of-File condition found at a correct place: an EOF that abruptly finishes in the middle of one object raises a plain std::exception instead.

Definition at line 498 of file CStream.cpp.

receiveMessage()

bool CStream::receiveMessage ( utils::CMessage &  msg )

inherited

Tries to receive a message from the device.

Exceptions

std::exception

On communication errors

Returns

True if successful, false if there is no new data from the device (but communications seem to work fine)

See also

The frame format is described in sendMessage()

Definition at line 590 of file CStream.cpp.

References mrpt::utils::CMessage::content, MAKEWORD16B, mrpt::system::os::memcpy(), MRPT_END, MRPT_START, and mrpt::utils::CMessage::type.

Referenced by mrpt::hwdrivers::CServoeNeck::disableServo(), mrpt::hwdrivers::CServoeNeck::enableServo(), mrpt::hwdrivers::CRoboticHeadInterface::Get3SoundBuffer(), mrpt::hwdrivers::CRoboticHeadInterface::GetGain(), mrpt::hwdrivers::CEnoseModular::getObservation(), mrpt::hwdrivers::CBoardENoses::getObservation(), mrpt::hwdrivers::CServoeNeck::getRegisterValue(), mrpt::hwdrivers::CRoboticHeadInterface::GetSoundLocation(), mrpt::hwdrivers::CServoeNeck::queryFirmwareVersion(), mrpt::hwdrivers::CBoardENoses::queryFirmwareVersion(), mrpt::hwdrivers::CRoboticHeadInterface::SetGain(), mrpt::hwdrivers::CServoeNeck::setRegisterValue(), and mrpt::hwdrivers::CServoeNeck::setRegisterValueAndSpeed().

Seek()

uint64_t CFileStream::Seek ( int64_t  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.

Definition at line 119 of file CFileStream.cpp.

References getPosition(), m_f, mrpt::utils::CStream::sFromBeginning, mrpt::utils::CStream::sFromCurrent, mrpt::utils::CStream::sFromEnd, and THROW_EXCEPTION.

Referenced by getTotalBytesCount().

sendMessage()

void CStream::sendMessage ( const utils::CMessage &  msg )

inherited

Send a message to the device.

Note that only the low byte from the "type" field will be used.

For frames of size < 255 the frame format is an array of bytes in this order:

<START_FLAG> <HEADER> <LENGTH> <BODY> <END_FLAG>
       <START_FLAG>    = 0x69
       <HEADER>                = A header byte
       <LENGHT>                = Number of bytes of BODY
       <BODY>                  = N x bytes
       <END_FLAG>              = 0X96
Total length   =       <LENGTH> + 4

For frames of size > 255 the frame format is an array of bytes in this order:

<START_FLAG> <HEADER> <HIBYTE(LENGTH)> <LOBYTE(LENGTH)> <BODY> <END_FLAG>
       <START_FLAG>    = 0x79
       <HEADER>                = A header byte
       <LENGHT>                = Number of bytes of BODY
       <BODY>                  = N x bytes
       <END_FLAG>              = 0X96
Total length   =       <LENGTH> + 5

Exceptions

std::exception

On communication errors

Definition at line 556 of file CStream.cpp.

References mrpt::utils::CMessage::content, mrpt::system::os::memcpy(), MRPT_END, MRPT_START, and mrpt::utils::CMessage::type.

Referenced by mrpt::hwdrivers::CServoeNeck::disableServo(), mrpt::hwdrivers::CServoeNeck::enableServo(), mrpt::hwdrivers::CRoboticHeadInterface::Get3SoundBuffer(), mrpt::hwdrivers::CRoboticHeadInterface::GetGain(), mrpt::hwdrivers::CServoeNeck::getRegisterValue(), mrpt::hwdrivers::CRoboticHeadInterface::GetSoundLocation(), mrpt::hwdrivers::CServoeNeck::queryFirmwareVersion(), mrpt::hwdrivers::CBoardENoses::queryFirmwareVersion(), mrpt::hwdrivers::CRoboticHeadInterface::SetGain(), mrpt::hwdrivers::CServoeNeck::setRegisterValue(), and mrpt::hwdrivers::CServoeNeck::setRegisterValueAndSpeed().

Write()

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

protectedvirtual

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::utils::CStream.

Definition at line 106 of file CFileStream.cpp.

References m_f.

WriteBuffer()

void CStream::WriteBuffer ( const void *  Buffer, size_t  Count  )

inherited

Writes a block of bytes to the stream from Buffer.

Exceptions

std::exception

On any error

See also

Important, see: WriteBufferFixEndianness

Note

This method is endianness-dependent.

Definition at line 67 of file CStream.cpp.

References ASSERT_, and THROW_EXCEPTION.

Referenced by mrpt::compress::zip::compress(), mrpt::utils::CMessage::deserializeIntoExistingObject(), mrpt::utils::CMessage::deserializeIntoNewObject(), mrpt::hwdrivers::CNTRIPEmitter::doProcess(), mrpt::hwdrivers::CGPSInterface::doProcess(), empty_output_buffer(), mrpt::hwdrivers::CGPSInterface::implement_parser_NOVATEL_OEM6(), mrpt::obs::gnss::Message_NV_OEM6_GENERIC_FRAME::internal_writeToStream(), mrpt::obs::gnss::Message_NV_OEM6_GENERIC_SHORT_FRAME::internal_writeToStream(), mrpt::obs::gnss::Message_NV_OEM6_RANGECMP::internal_writeToStream(), mrpt::obs::gnss::Message_NV_OEM6_VERSION::internal_writeToStream(), mrpt::utils::mrpt_recv_from_zmq_buf(), mrpt::utils::ObjectToString(), mrpt::hwdrivers::CGPSInterface::OnConnectionEstablished(), mrpt::hwdrivers::CGPSInterface::OnConnectionShutdown(), mrpt::utils::operator<<(), mrpt::utils::CMemoryStream::saveBufferToFile(), mrpt::hwdrivers::CHokuyoURG::sendCmd(), mrpt::hwdrivers::CGPSInterface::sendCustomCommand(), mrpt::hwdrivers::CBoardENoses::setActiveChamber(), mrpt::utils::StringToObject(), term_destination(), mrpt::system::vectorToBinaryFile(), mrpt::nav::CLogFileRecord::writeToStream(), mrpt::maps::CHeightGridMap2D_MRF::writeToStream(), mrpt::maps::CGasConcentrationGridMap2D::writeToStream(), mrpt::maps::CWirelessPowerGridMap2D::writeToStream(), mrpt::obs::CObservation2DRangeScan::writeToStream(), mrpt::maps::CReflectivityGridMap2D::writeToStream(), mrpt::obs::CObservationVelodyneScan::writeToStream(), mrpt::maps::COccupancyGridMap2D::writeToStream(), mrpt::maps::CRandomFieldGridMap3D::writeToStream(), mrpt::utils::CImage::writeToStream(), and mrpt::opengl::CRenderizable::writeToStreamRender().

WriteBufferFixEndianness()

template<typename T >

void mrpt::utils::CStream::WriteBufferFixEndianness ( const T *  ptr, size_t  ElementCount  )

inlineinherited

Writes a sequence of elemental datatypes, taking care of reordering their bytes from the running architecture to MRPT stream standard (little endianness).

Parameters

ElementCount	The number of elements (not bytes) to write.
ptr	A pointer to the first input element in an array (or std::vector<>, etc...). Example of usage: vector<float> vec = ... uint32_t N = vec.size(); s << N if (N) s.WriteBufferFixEndianness<float>(&vec[0],N);

Exceptions

std::exception

On any error

See also

WriteBuffer

Definition at line 139 of file CStream.h.

Referenced by triangle_writeToStream(), mrpt::math::CMatrix::writeToStream(), mrpt::math::CMatrixD::writeToStream(), mrpt::maps::CColouredPointsMap::writeToStream(), mrpt::maps::CWeightedPointsMap::writeToStream(), mrpt::maps::CSimplePointsMap::writeToStream(), mrpt::obs::CObservation2DRangeScan::writeToStream(), mrpt::maps::COccupancyGridMap2D::writeToStream(), and mrpt::obs::CObservation3DRangeScan::writeToStream().

WriteObject()

void CStream::WriteObject ( const CSerializable *  o )

inherited

Writes an object to the stream.

Definition at line 166 of file CStream.cpp.

References ASSERT_, mrpt::utils::TRuntimeClassId::className, mrpt::utils::CSerializable::GetRuntimeClass(), MRPT_END, MRPT_START, SERIALIZATION_END_FLAG, version, and mrpt::utils::CSerializable::writeToStream().

Referenced by mrpt::utils::mrpt_send_to_zmq(), mrpt::utils::ObjectToOctetVector(), mrpt::utils::ObjectToRawString(), mrpt::utils::ObjectToString(), and mrpt::utils::CMessage::serializeObject().

Member Data Documentation

m_f

std::fstream mrpt::utils::CFileStream::m_f

private

The actual input file stream.

Definition at line 45 of file CFileStream.h.

Referenced by CFileStream(), checkEOF(), clearError(), close(), fileOpenCorrectly(), getPosition(), getPositionI(), getPositionO(), open(), Read(), readLine(), Seek(), Write(), and ~CFileStream().