mrpt::io::CTextFileLinesParser Class Reference

Detailed Description

A class for parsing text files, returning each non-empty and non-comment line, along its line number.

Lines are strip out of leading and trailing whitespaces. By default, lines starting with either "#", "//" or "%" are skipped as comment lines, unless this behavior is explicitly disabled with enableCommentFilters.

Definition at line 26 of file CTextFileLinesParser.h.

#include <mrpt/io/CTextFileLinesParser.h>

Public Member Functions
	CTextFileLinesParser ()
	Default constructor; should call open() at some moment later. More...
	CTextFileLinesParser (const std::string &fil)
	Constructor for opening a file. More...
void	open (const std::string &fil)
	Open a file (an alternative to the constructor with a file name) More...
void	close ()
	Close the file (no need to call it normally, the file is closed upon destruction) More...
void	rewind ()
	Reset the read pointer to the beginning of the file. More...
bool	getNextLine (std::string &out_str)
	Reads from the file and return the next (non-comment) line, as a std::string. More...
bool	getNextLine (std::istringstream &buf)
	Reads from the file and stores the next (non-comment) line into the given stream buffer. More...
size_t	getCurrentLineNumber () const
	Return the line number of the last line returned with getNextLine. More...
void	enableCommentFilters (bool filter_MATLAB_comments, bool filter_C_comments, bool filter_SH_comments)
	Enable/disable filtering of lines starting with "%", "//" or "#", respectively. More...

Private Attributes
std::string	m_fileName
std::ifstream	m_in
size_t	m_curLineNum {0}
bool	m_filter_MATLAB_comments {true}
bool	m_filter_C_comments {true}
bool	m_filter_SH_comments {true}

Constructor & Destructor Documentation

CTextFileLinesParser() [1/2]

mrpt::io::CTextFileLinesParser::CTextFileLinesParser ( )

inline

Default constructor; should call open() at some moment later.

Definition at line 30 of file CTextFileLinesParser.h.

CTextFileLinesParser() [2/2]

CTextFileLinesParser::CTextFileLinesParser

(

const std::string &

fil

)

Constructor for opening a file.

Exceptions

std::exception

On error opening file

Definition at line 20 of file CTextFileLinesParser.cpp.

Member Function Documentation

close()

void CTextFileLinesParser::close

(

)

Close the file (no need to call it normally, the file is closed upon destruction)

Definition at line 36 of file CTextFileLinesParser.cpp.

enableCommentFilters()

void CTextFileLinesParser::enableCommentFilters	(	bool	filter_MATLAB_comments,
		bool	filter_C_comments,
		bool	filter_SH_comments
	)

Enable/disable filtering of lines starting with "%", "//" or "#", respectively.

Definition at line 84 of file CTextFileLinesParser.cpp.

getCurrentLineNumber()

size_t CTextFileLinesParser::getCurrentLineNumber

(

)

const

Return the line number of the last line returned with getNextLine.

Definition at line 79 of file CTextFileLinesParser.cpp.

Referenced by mrpt::graphs::detail::graph_ops< graph_t >::load_graph_of_poses_from_text_file().

getNextLine() [1/2]

bool CTextFileLinesParser::getNextLine

(

std::istringstream &

buf

)

Reads from the file and stores the next (non-comment) line into the given stream buffer.

Returns

false on EOF.

Definition at line 57 of file CTextFileLinesParser.cpp.

References mrpt::system::strStarts(), and mrpt::system::trim().

getNextLine() [2/2]

bool CTextFileLinesParser::getNextLine

(

std::string &

out_str

)

Reads from the file and return the next (non-comment) line, as a std::string.

Returns

false on EOF.

Definition at line 44 of file CTextFileLinesParser.cpp.

Referenced by mrpt::graphs::detail::graph_ops< graph_t >::load_graph_of_poses_from_text_file().

open()

void CTextFileLinesParser::open

(

const std::string &

fil

)

Open a file (an alternative to the constructor with a file name)

Definition at line 25 of file CTextFileLinesParser.cpp.

References THROW_EXCEPTION_FMT.

rewind()

void CTextFileLinesParser::rewind

(

)

Reset the read pointer to the beginning of the file.

Definition at line 37 of file CTextFileLinesParser.cpp.

Referenced by mrpt::graphs::detail::graph_ops< graph_t >::load_graph_of_poses_from_text_file().

Member Data Documentation

m_curLineNum

size_t mrpt::io::CTextFileLinesParser::m_curLineNum {0}

private

Definition at line 68 of file CTextFileLinesParser.h.

m_fileName

std::string mrpt::io::CTextFileLinesParser::m_fileName

private

Definition at line 66 of file CTextFileLinesParser.h.

m_filter_C_comments

bool mrpt::io::CTextFileLinesParser::m_filter_C_comments {true}

private

Definition at line 70 of file CTextFileLinesParser.h.

m_filter_MATLAB_comments

bool mrpt::io::CTextFileLinesParser::m_filter_MATLAB_comments {true}

private

Definition at line 69 of file CTextFileLinesParser.h.

m_filter_SH_comments

bool mrpt::io::CTextFileLinesParser::m_filter_SH_comments {true}

private

Definition at line 71 of file CTextFileLinesParser.h.

m_in

std::ifstream mrpt::io::CTextFileLinesParser::m_in

private

Definition at line 67 of file CTextFileLinesParser.h.