code::LBReader Class Reference

Inheritance diagram for code::LBReader:

List of all members.

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Detailed Description

Reads a message from a Linear Buffer.

By default read() reads from LB_NEXT. Other message id's can be specified by adding an `id' tag to the open() URL's query section: lb://tensor/realtime/data/some.lb&id=4

Author:

: Lakshman

Version:

:

Id

code_LBReader.h,v 1.12 2009/06/02 20:17:38 lakshman Exp

Public Member Functions
virtual int	open (const URL &url)
virtual int	read (Buffer &buf, long offset=0, size_t max_size=0)
virtual	~LBReader ()
Static Public Member Functions
static int	read (const URL &url, Buffer &buffer, long offset=0, size_t max_len=0)
	Convenience function to read `url' into `buf'.
static int	read (const URL &url, std::string &s, long offset=0, size_t max_len=0)
	Identical to read(const URL&,Buffer&,long,size_t) except it takes a string instead of a buffer.
static int	readRaw (const URL &url, Buffer &b, long offset=0, size_t max_len=0)
	Identical to read() except except it doesn't uncompress files.
static SmartPtr< XML::Document >	readXMLDocument (const URL &url)
	Returns an XML::Document created by passing the contents of `url' to XML::Parser::parse().
static SmartPtr< Reader >	getReader (const URL &url)
	Returns a handle to a reader for the given URL.
static void	introduceWDSSIIReaders ()

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Constructor & Destructor Documentation

virtual code::LBReader::~LBReader

(

)

[virtual]

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Member Function Documentation

static SmartPtr<Reader> code::Reader::getReader

(

const URL &

url

)

[static, inherited]

Returns a handle to a reader for the given URL.

This is useful when you want to make iterative calls to read() or LineReader::readLine().

static void code::Reader::introduceWDSSIIReaders

(

)

[static, inherited]

virtual int code::LBReader::open

(

const URL &

url

)

[virtual]

Implements code::SchemeReader.

static int code::Reader::read	(	const URL &	url,
		std::string &	s,
		long	offset = 0,
		size_t	max_len = 0
	)			[static, inherited]

Identical to read(const URL&,Buffer&,long,size_t) except it takes a string instead of a buffer.

static int code::Reader::read	(	const URL &	url,
		Buffer &	buffer,
		long	offset = 0,
		size_t	max_len = 0
	)			[static, inherited]

Convenience function to read `url' into `buf'.

Handles remote, local, compressed, and uncompressed files transparently.

Parameters:

	url	the data source.
	buffer	where source's contents will be stored.
	offset	number of bytes to skip before read() begins storing.
	max_len	if nonzero, maximum number of bytes to store in buf.

Returns:

the number of bytes read, or a negative number on error.

virtual int code::LBReader::read	(	Buffer &	buf,
		long	offset = 0,
		size_t	max_size = 0
	)			[virtual]

See also:

static int read (URL, Buffer, offset, long, size_t);

Implements code::Reader.

static int code::Reader::readRaw	(	const URL &	url,
		Buffer &	b,
		long	offset = 0,
		size_t	max_len = 0
	)			[static, inherited]

Identical to read() except except it doesn't uncompress files.

This is useful when mirroring compressed files to avoid decompress / recompress steps.

static SmartPtr<XML::Document> code::Reader::readXMLDocument

(

const URL &

url

)

[static, inherited]

Returns an XML::Document created by passing the contents of `url' to XML::Parser::parse().

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