A position list in a chert database. More...

#include <chert_positionlist.h>

Inheritance diagram for ChertPositionList:

Collaboration diagram for ChertPositionList:

Public Member Functions
	ChertPositionList ()
	Default constructor. More...

	ChertPositionList (const ChertTable *table, Xapian::docid did, const string &tname)
	Construct and initialise with data. More...

bool	read_data (const ChertTable *table, Xapian::docid did, const string &tname)
	Fill list with data, and move the position to the start. More...

Xapian::termcount	get_approx_size () const
	Returns size of position list. More...

Xapian::termpos	get_position () const
	Returns current position. More...

bool	next ()
	Advance to the next term position in the list. More...

bool	skip_to (Xapian::termpos termpos)
	Advance to the first term position which is at least termpos. More...

Public Member Functions inherited from Xapian::PositionIterator::Internal
virtual	~Internal ()
	We have virtual methods and want to be able to delete derived classes using a pointer to the base class, so we need a virtual destructor. More...

Public Member Functions inherited from Xapian::Internal::intrusive_base
	intrusive_base ()
	Construct with no references. More...

Private Member Functions
	ChertPositionList (const ChertPositionList &)
	Copying is not allowed. More...

void	operator= (const ChertPositionList &)
	Assignment is not allowed. More...

Private Attributes
BitReader	rd
	Interpolative decoder. More...

Xapian::termpos	current_pos
	Current entry. More...

Xapian::termpos	last
	Last entry. More...

Xapian::termcount	size
	Number of entries. More...

bool	have_started
	Have we started iterating yet? More...

Additional Inherited Members
Public Attributes inherited from Xapian::Internal::intrusive_base
unsigned	_refs
	Reference count. More...

Protected Member Functions inherited from Xapian::PositionIterator::Internal
	Internal ()
	Only constructable as a base class for derived classes. More...

Detailed Description

A position list in a chert database.

Definition at line 78 of file chert_positionlist.h.

Constructor & Destructor Documentation

◆ ChertPositionList() [1/3]

ChertPositionList::ChertPositionList ( const ChertPositionList & )

private

Copying is not allowed.

◆ ChertPositionList() [2/3]

ChertPositionList::ChertPositionList ( )

inline

Default constructor.

Definition at line 102 of file chert_positionlist.h.

◆ ChertPositionList() [3/3]

ChertPositionList::ChertPositionList	(	const ChertTable *	table,
		Xapian::docid	did,
		const string &	tname
	)

inline

Construct and initialise with data.

Definition at line 105 of file chert_positionlist.h.

Member Function Documentation

◆ get_approx_size()

Xapian::termcount ChertPositionList::get_approx_size ( ) const

virtual

Returns size of position list.

Implements Xapian::PositionIterator::Internal.

Definition at line 142 of file chert_positionlist.cc.

References LOGCALL, and RETURN.

◆ get_position()

Xapian::termpos ChertPositionList::get_position ( ) const

virtual

Returns current position.

Either next() or skip_to() must have been called before this method can be called.

Implements Xapian::PositionIterator::Internal.

Definition at line 149 of file chert_positionlist.cc.

References Assert, LOGCALL, and RETURN.

◆ next()

bool ChertPositionList::next ( )

virtual

Advance to the next term position in the list.

Implements Xapian::PositionIterator::Internal.

Definition at line 157 of file chert_positionlist.cc.

References LOGCALL, and rare.

◆ operator=()

void ChertPositionList::operator= ( const ChertPositionList & )

private

Assignment is not allowed.

◆ read_data()

bool ChertPositionList::read_data	(	const ChertTable *	table,
		Xapian::docid	did,
		const string &	tname
	)

Fill list with data, and move the position to the start.

Returns: true if position data was read.

Definition at line 102 of file chert_positionlist.cc.

References ChertTable::get_exact_entry(), LOGCALL, ChertPositionListTable::make_key(), RETURN, and unpack_uint().

Referenced by ChertPostList::read_position_list().

◆ skip_to()

bool ChertPositionList::skip_to ( Xapian::termpos termpos )

virtual

Advance to the first term position which is at least termpos.

Implements Xapian::PositionIterator::Internal.

Definition at line 172 of file chert_positionlist.cc.

References LOGCALL.

Member Data Documentation

◆ current_pos

Xapian::termpos ChertPositionList::current_pos

private

Current entry.

Definition at line 83 of file chert_positionlist.h.

◆ have_started

bool ChertPositionList::have_started

private

Have we started iterating yet?

Definition at line 92 of file chert_positionlist.h.

◆ last

Xapian::termpos ChertPositionList::last

private

Last entry.

Definition at line 86 of file chert_positionlist.h.

◆ rd

BitReader ChertPositionList::rd

private

Interpolative decoder.

Definition at line 80 of file chert_positionlist.h.

◆ size

Xapian::termcount ChertPositionList::size

private

Number of entries.

Definition at line 89 of file chert_positionlist.h.

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

backends/chert/chert_positionlist.h
backends/chert/chert_positionlist.cc

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ChertPositionList() [1/3]

◆ ChertPositionList() [2/3]

◆ ChertPositionList() [3/3]

Member Function Documentation

◆ get_approx_size()

◆ get_position()

◆ next()

◆ operator=()

◆ read_data()

◆ skip_to()

Member Data Documentation

◆ current_pos

◆ have_started

◆ last

◆ rd

◆ size