/*****************************************************************************

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This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.

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as designated in a particular file or component or in included license
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*****************************************************************************/

/******************************************************************//**
@file include/fut0lst.h
File-based list utilities

Created 11/28/1995 Heikki Tuuri
***********************************************************************/

#ifndef fut0lst_h
#define fut0lst_h

#ifndef UNIV_INNOCHECKSUM

#include "univ.i"

#include "fil0fil.h"
#include "mtr0mtr.h"


/* The C 'types' of base node and list node: these should be used to
write self-documenting code. Of course, the sizeof macro cannot be
applied to these types! */

typedef	byte	flst_base_node_t;
typedef	byte	flst_node_t;

/* The physical size of a list base node in bytes */
#define	FLST_BASE_NODE_SIZE	(4 + 2 * FIL_ADDR_SIZE)
#endif /* !UNIV_INNOCHECKSUM */

/* The physical size of a list node in bytes */
#define	FLST_NODE_SIZE		(2 * FIL_ADDR_SIZE)

#if !defined UNIV_HOTBACKUP && !defined UNIV_INNOCHECKSUM
/********************************************************************//**
Initializes a list base node. */
UNIV_INLINE
void
flst_init(
/*======*/
	flst_base_node_t*	base,	/*!< in: pointer to base node */
	mtr_t*			mtr);	/*!< in: mini-transaction handle */
/********************************************************************//**
Adds a node as the last node in a list. */
void
flst_add_last(
/*==========*/
	flst_base_node_t*	base,	/*!< in: pointer to base node of list */
	flst_node_t*		node,	/*!< in: node to add */
	mtr_t*			mtr);	/*!< in: mini-transaction handle */
/********************************************************************//**
Adds a node as the first node in a list. */
void
flst_add_first(
/*===========*/
	flst_base_node_t*	base,	/*!< in: pointer to base node of list */
	flst_node_t*		node,	/*!< in: node to add */
	mtr_t*			mtr);	/*!< in: mini-transaction handle */
/********************************************************************//**
Inserts a node after another in a list. */
void
flst_insert_after(
/*==============*/
	flst_base_node_t*	base,	/*!< in: pointer to base node of list */
	flst_node_t*		node1,	/*!< in: node to insert after */
	flst_node_t*		node2,	/*!< in: node to add */
	mtr_t*			mtr);	/*!< in: mini-transaction handle */
/********************************************************************//**
Inserts a node before another in a list. */
void
flst_insert_before(
/*===============*/
	flst_base_node_t*	base,	/*!< in: pointer to base node of list */
	flst_node_t*		node2,	/*!< in: node to insert */
	flst_node_t*		node3,	/*!< in: node to insert before */
	mtr_t*			mtr);	/*!< in: mini-transaction handle */
/********************************************************************//**
Removes a node. */
void
flst_remove(
/*========*/
	flst_base_node_t*	base,	/*!< in: pointer to base node of list */
	flst_node_t*		node2,	/*!< in: node to remove */
	mtr_t*			mtr);	/*!< in: mini-transaction handle */

/** Get the length of a list.
@param[in]	base	base node
@return length */
UNIV_INLINE
ulint
flst_get_len(
	const flst_base_node_t*	base);
/********************************************************************//**
Gets list first node address.
@return file address */
UNIV_INLINE
fil_addr_t
flst_get_first(
/*===========*/
	const flst_base_node_t*	base,	/*!< in: pointer to base node */
	mtr_t*			mtr);	/*!< in: mini-transaction handle */
/********************************************************************//**
Gets list last node address.
@return file address */
UNIV_INLINE
fil_addr_t
flst_get_last(
/*==========*/
	const flst_base_node_t*	base,	/*!< in: pointer to base node */
	mtr_t*			mtr);	/*!< in: mini-transaction handle */
/********************************************************************//**
Gets list next node address.
@return file address */
UNIV_INLINE
fil_addr_t
flst_get_next_addr(
/*===============*/
	const flst_node_t*	node,	/*!< in: pointer to node */
	mtr_t*			mtr);	/*!< in: mini-transaction handle */
/********************************************************************//**
Gets list prev node address.
@return file address */
UNIV_INLINE
fil_addr_t
flst_get_prev_addr(
/*===============*/
	const flst_node_t*	node,	/*!< in: pointer to node */
	mtr_t*			mtr);	/*!< in: mini-transaction handle */
/********************************************************************//**
Writes a file address. */
UNIV_INLINE
void
flst_write_addr(
/*============*/
	fil_faddr_t*	faddr,	/*!< in: pointer to file faddress */
	fil_addr_t	addr,	/*!< in: file address */
	mtr_t*		mtr);	/*!< in: mini-transaction handle */
/********************************************************************//**
Reads a file address.
@return file address */
UNIV_INLINE
fil_addr_t
flst_read_addr(
/*===========*/
	const fil_faddr_t*	faddr,	/*!< in: pointer to file faddress */
	mtr_t*			mtr);	/*!< in: mini-transaction handle */
/********************************************************************//**
Validates a file-based list.
@return TRUE if ok */
ibool
flst_validate(
/*==========*/
	const flst_base_node_t*	base,	/*!< in: pointer to base node of list */
	mtr_t*			mtr1);	/*!< in: mtr */
/********************************************************************//**
Prints info of a file-based list. */
void
flst_print(
/*=======*/
	const flst_base_node_t*	base,	/*!< in: pointer to base node of list */
	mtr_t*			mtr);	/*!< in: mtr */


#ifndef UNIV_NONINL
#include "fut0lst.ic"
#endif

#endif /* !UNIV_HOTBACKUP && !UNIV_INNOCHECKSUM*/

#endif
