C# Class Majestic12.FastHash

FastHash: class provides fast look ups at the expense of memory (at least 128k per object). Its designed primarily for those hashes where majority of lookups are unsuccessful (ie object is not present) Status of this work is EXPERIMENTAL, do not make any untested assumptions. History: 15/12/06 Added range check in GetXY sometime in 2005: initial imlpementation

Inheritance: IDisposable

Mostra file Open project: arktronic/sevenauth Class Usage Examples

Public Methods

Method	Description
Add ( string sKey ) : void	Adds key to the fast hash
Add ( string sKey, object iValue ) : void	Adds key and its value to the fast hash
Contains ( string sKey ) : bool	Checks if given key is present in the hash
Dispose ( ) : void
FastHash ( ) : System
GetLikelyPresentValue ( byte iX, byte iY ) : object	Returns value for likely present keys using first chars (byte)
GetLikelyPresentValue ( string sKey ) : object	Returns value of a key that is VERY likely to be present - this avoids doing some checks that are most likely to be pointless thus making overall faster function
GetValue ( string sKey ) : object	Returns value associated with the key or null if key not present
GetXY ( string sKey, int &iX, int &iY ) : void
PossiblyContains ( char cChar1, char cChar2, int iLength ) : bool	Quickly checks if given chars POSSIBLY refer to a stored key.
this ( string sKey ) : object	Access to values via indexer

Private Methods

Method	Description
Dispose ( bool bDisposing ) : void

Method Details

Add() public method

Adds key to the fast hash

public Add ( string sKey ) : void
sKey	string	Key
return	void

Add() public method

Adds key and its value to the fast hash

public Add ( string sKey, object iValue ) : void
sKey	string	Key
iValue	object	Value
return	void

Contains() public method

Checks if given key is present in the hash

public Contains ( string sKey ) : bool
sKey	string	Key
return	bool

Dispose() public method

public Dispose ( ) : void
return	void

FastHash() public method

public FastHash ( ) : System
return	System

GetLikelyPresentValue() public method

Returns value for likely present keys using first chars (byte)

public GetLikelyPresentValue ( byte iX, byte iY ) : object
iX	byte	Byte 1 denoting char 1
iY	byte	Byte 2 denoting char 2 (0 if not present)
return	object

GetLikelyPresentValue() public method

Returns value of a key that is VERY likely to be present - this avoids doing some checks that are most likely to be pointless thus making overall faster function

public GetLikelyPresentValue ( string sKey ) : object
sKey	string	Key
return	object

GetValue() public method

Returns value associated with the key or null if key not present

public GetValue ( string sKey ) : object
sKey	string	Key
return	object

GetXY() public static method

public static GetXY ( string sKey, int &iX, int &iY ) : void
sKey	string
iX	int
iY	int
return	void

PossiblyContains() public method

Quickly checks if given chars POSSIBLY refer to a stored key.

public PossiblyContains ( char cChar1, char cChar2, int iLength ) : bool
cChar1	char	Char 1
cChar2	char	Char 2
iLength	int	Length of string
return	bool

this() public method

Access to values via indexer

public this ( string sKey ) : object
sKey	string
return	object