Cursor Class Reference

#include <bcursor.h>

List of all members.

Public Member Functions
	Cursor ()
	Constructor, to initialise important elements.
Public Attributes
byte *	p
	pointer to a block
int	c
	offset in the block's directory
uint4	n
	block number
bool	rewrite
	true if the block is not the same as on disk, and so needs rewriting
Private Member Functions
	Cursor (const Cursor &)
Cursor &	operator= (const Cursor &)

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Detailed Description

Definition at line 34 of file bcursor.h.

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Constructor & Destructor Documentation

Cursor::Cursor

(

const Cursor &

)

[private]

Cursor::Cursor

(

)

[inline]

Constructor, to initialise important elements.

Definition at line 42 of file bcursor.h.

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Member Function Documentation

Cursor& Cursor::operator=

(

const Cursor &

)

[private]

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Member Data Documentation

byte* Cursor::p

pointer to a block

Definition at line 46 of file bcursor.h.

Referenced by Btree::add(), Btree::add_item(), Btree::add_kt(), Btree::alter(), Bcursor::Bcursor(), BtreeCheck::block_check(), Btree::block_to_cursor(), Btree::close(), Btree::delete_item(), Btree::do_open_to_read(), Btree::do_open_to_write(), Btree::enter_key(), Btree::next_default(), Btree::next_for_sequential(), Btree::prev_default(), Btree::prev_for_sequential(), Btree::read_root(), and Btree::split_root().

int Cursor::c

offset in the block's directory

Definition at line 48 of file bcursor.h.

Referenced by Btree::add_item(), Btree::add_kt(), Btree::commit(), Btree::delete_item(), Btree::enter_key(), Bcursor::find_entry(), Btree::next_default(), Btree::next_for_sequential(), Btree::prev_default(), Btree::prev_for_sequential(), and Btree::split_root().

uint4 Cursor::n

block number

n is kept in tandem with p. The unassigned state is when p == 0 and n == BLK_UNUSED.

Setting n to BLK_UNUSED is necessary in at least some cases.

Definition at line 57 of file bcursor.h.

Referenced by Btree::add_item(), Btree::alter(), Bcursor::Bcursor(), BtreeCheck::block_check(), Btree::block_to_cursor(), Btree::commit(), Btree::delete_item(), Btree::enter_key(), Btree::next_for_sequential(), Btree::prev_for_sequential(), Btree::read_root(), and Btree::split_root().

bool Cursor::rewrite

true if the block is not the same as on disk, and so needs rewriting

Definition at line 59 of file bcursor.h.

Referenced by Btree::alter(), Btree::block_to_cursor(), Btree::cancel(), Btree::commit(), Btree::delete_item(), Btree::enter_key(), and Btree::split_root().

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

• backends/quartz/bcursor.h

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