A class to read JSON messages from C++ istreams. More...

Inheritance diagram for argo::stream_reader:

Public Member Functions
	stream_reader (std::istream *s, int max_message_length, bool block_read)

Public Member Functions inherited from argo::reader
	reader (size_t max_message_length, bool block_read)

virtual int	next ()
	Get the next character from the reader. More...

virtual void	put_back (int c)
	Put back a character so that it is returned by the next call to next().

size_t	get_byte_index () const
	Get the current byte index in the input.

void	reset_byte_index ()
	Reset the byte index at the start of parsing a messege.

Protected Member Functions
virtual int	read_next_char ()

virtual bool	read_next_block ()

Protected Member Functions inherited from argo::reader
int	read_next_char_from_block ()
	When in block read mode, get the next available character.

Protected Attributes
std::istream *	m_stream
	The C++ stream to read from.

Protected Attributes inherited from argo::reader
int	m_put_back
	Character last put back. If equal to no_put_back then none was.

size_t	m_byte_index
	Total number of characters read.

size_t	m_max_message_length
	Maximum length of a message.

bool	m_block_read
	Whether to read in blocks or one byte at a time.

unsigned char	m_block [block_size]
	If we're reading blocks, the block data.

int	m_block_num_bytes
	If we're reading blocks, the number of bytes in the current block.

int	m_block_index
	If we're reading blocks, the index into the current block.

Additional Inherited Members
Static Public Attributes inherited from argo::reader
static const int	block_size = 8192
	Amount of data to read at once when in block read mode.

Static Protected Attributes inherited from argo::reader
static const int	no_put_back = 1000
	Special character value indicating that no character has been put back.

Detailed Description

A class to read JSON messages from C++ istreams.

Definition at line 35 of file stream_reader.hpp.

Constructor & Destructor Documentation

Constructor.

Parameters

s	IOSTREAMS input stream. The instance does not take ownership of the stream and it is up to the calling code to close it when done.
max_message_length	Longest message that can be read.
block_read	Whether to read in blocks or one byte at a time.

Definition at line 33 of file stream_reader.cpp.

bool stream_reader::read_next_block ( )

protectedvirtual

Read the next block of data up to block_size bytes.

Exceptions

json_io_error if the read failed for some reason other than EOF.

Definition at line 44 of file stream_reader.cpp.

int stream_reader::read_next_char ( )

protectedvirtual

Read a character from the file using fread()

Exceptions

json_io_exception Thrown if fread fails in some way.

Definition at line 39 of file stream_reader.cpp.

The documentation for this class was generated from the following files: