This concrete template class provide a basic implementation of the Frame::Decoder interface that uses Cpl::Io::Input stream as the input source. More...

Detailed Description

template<int BUFSIZE>
class Cpl::Text::Frame::LineDecoder< BUFSIZE >

This concrete template class provide a basic implementation of the Frame::Decoder interface that uses Cpl::Io::Input stream as the input source.

In addition this class only accepts PRINTABLE ASCII characters within the frame; AND the start-of-frame character is ANY printable ASCII; AND the end-of-frame character is a newline character (\r or \n); AND there is NO escape sequence since the escape sequence is need to embedded EOF characters - but in this case EOF (newline) is NOT a printable ASCII character -->so an escape sequence is not meaningful.

NOTE: If a non-printable ASCII character is encounter within a frame, the current frame is aborted AND a newline character is required before accepting/detecting a new SOF character(s).

Template args: BUFSIZE Size of the internal buffer to use when reading raw characters from the Input stream.

#include <LineDecoder.h>

Inheritance diagram for Cpl::Text::Frame::LineDecoder< BUFSIZE >:

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Collaboration diagram for Cpl::Text::Frame::LineDecoder< BUFSIZE >:

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Public Member Functions
	LineDecoder (Cpl::Io::Input *inputSource=0, char convertTabs='\t', bool blocking=true)
	Constructor.

Public Member Functions inherited from Cpl::Text::Frame::StreamDecoder
void	setInput (Cpl::Io::Input &newInFd) noexcept
	This method allows the Application/consumer to change/Set the Input Stream handle.

Public Member Functions inherited from Cpl::Text::Frame::Decoder_
	Decoder_ (char rawInputBuffer[], size_t sizeOfRawInputBuffer)
	Constructor.

bool	scan (size_t maxSizeOfFrame, char *frame, size_t &frameSize) noexcept
	See Cpl::Text::Frame::Decoder.

bool	scan (size_t maxSizeOfFrame, char *frame, size_t &frameSize, bool &isEof) noexcept
	See Cpl::Text::Frame::Decoder.

bool	oobRead (void *buffer, int numBytes, int &bytesRead) noexcept
	See Cpl::Text::Frame::Decoder.

Public Member Functions inherited from Cpl::Text::Frame::Decoder
virtual	~Decoder ()
	Virtual Destructor.

Protected Member Functions
bool	isStartOfFrame () noexcept
	See Cpl::Text::Frame::Decoder_.

bool	isEofOfFrame () noexcept
	See Cpl::Text::Frame::Decoder_.

bool	isEscapeChar () noexcept
	See Cpl::Text::Frame::Decoder_.

bool	isLegalCharacter () noexcept
	See Cpl::Text::Frame::Decoder_.

Protected Member Functions inherited from Cpl::Text::Frame::StreamDecoder
	StreamDecoder (char rawInputBuffer[], size_t sizeOfRawInputBuffer, Cpl::Io::Input *inputSource=0, bool blocking=true)
	Constructor.

bool	read (void *buffer, int numBytes, int &bytesRead)
	See Cpl::Text::Frame::Decoder_.

Protected Member Functions inherited from Cpl::Text::Frame::Decoder_
virtual char	decodeEscapedChar (char escapedChar)
	Returns the un-encoded value for the specified escaped character.

virtual void	initializeFrame () noexcept
	Helper method to initialize frame processing.

Protected Attributes
bool	m_illegal
	Track if I have encountered an invalid character in the 'middle' of a frame.

char	m_convertTabs
	Remember my tabs option.

char	m_buffer [BUFSIZE]
	Raw input buffer for reading characters in 'chunks' from my Input stream (i.e. minimize the calls to read())

Protected Attributes inherited from Cpl::Text::Frame::StreamDecoder
Cpl::Io::Input *volatile	m_srcPtr
	Input stream.

bool	m_blocking
	Block semantics.

Protected Attributes inherited from Cpl::Text::Frame::Decoder_
int	m_dataLen
	Current number of characters remaining in my raw input buffer.

char *	m_dataPtr
	Pointer to the next unprocessed character in my raw input buffer.

char *	m_buffer
	Raw input buffer for reading characters in 'chunks' from my Input stream (i.e. minimize the calls to read())

size_t	m_bufSize
	Size of my raw input buffer.

bool	m_inFrame
	Flag: I am currently in a Frame.

bool	m_escaping
	Flag: the next character is an escape character.

char *	m_framePtr
	Pointer to the next decoded frame character.

size_t	m_frameSize
	Number of bytes current decoded for the frame.

Constructor & Destructor Documentation

◆ LineDecoder()

template<int BUFSIZE>

Cpl::Text::Frame::LineDecoder< BUFSIZE >::LineDecoder	(	Cpl::Io::Input *	inputSource = 0,
		char	convertTabs = '\t',
		bool	blocking = true )

inline

Constructor.

If the 'convertTabs' argument is set to a value OTHER than a tab character, then any tab characters encounter will be converted to the value of 'convertTabs'.