ibis::ridHandler Class Reference

A class for handling file IO for ibis::rid_t. More...

#include <rids.h>

Public Member Functions
int	append (const RIDSet &rids, const char *destination) const
	Append the rid set to the name file. More...
int	read (RIDSet &rids, const char *source)
	This function is capable of reading a file written with one write command and multiple append commands. More...
	ridHandler (const char *dbName, const char *pref="ibis")
int	write (const RIDSet &rids, const char *destination, const char *dbName=0)
	Write the rid set. More...

Protected Member Functions
int	matchDBName (std::istream &_from) const
int	readDBName (std::istream &_from)
int	readRidCount (std::istream &_from, int &ic) const
int	readVersion (std::istream &_from) const

Protected Attributes
char *	_dbName
char *	_prefix
pthread_mutex_t	mutex

Static Protected Attributes
static const char *const	version = "0.3"
	Implements the functions defined in ibis::ridHandler.

Detailed Description

A class for handling file IO for ibis::rid_t.

Member Function Documentation

int ibis::ridHandler::append	(	const RIDSet &	rids,
		const char *	fname
	)		const

Append the rid set to the name file.

Return the number of rids written. This function can be called after ibis::ridHandler::write has been called to write a file. It can be called many times. The function ibis::ridHandler::read will concatenate all rid sets into one.

References ibis::array_t< T >::size().

int ibis::ridHandler::read	(	ibis::RIDSet &	rids,
		const char *	fname
	)

This function is capable of reading a file written with one write command and multiple append commands.

All rids are placed in rids in the order they appear in the file. The member varialbe _dbName will be set to the name stored in the file.

References ibis::array_t< T >::push_back(), ibis::array_t< T >::reserve(), and ibis::array_t< T >::size().

int ibis::ridHandler::write	(	const RIDSet &	rids,
		const char *	fname,
		const char *	dbName = 0
	)

Write the rid set.

Return the number of rids written. If the first argument is specified, the internally stored dbName would be modified.

References ibis::array_t< T >::size(), and ibis::util::strnewdup().

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

• rids.h
• rids.cpp