X base: Convert numbers between different numeric bases

coded by uwe stein
 
Copyright (C) 2010  Uwe Stein


hints, suggestions and bug reports are welcome. 



Here is a small overview how to use the x_base object


---------------------------------------------------------------Class mebers:---------------------------------------------------
alnum_digit = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"   	default use upper case letters 
num     						the umber encoded with base
base							the used base  ( bin, dec,..., oct, ... hex, ... ) 
max_base 						the maximum base = strlen( $this->alnum_digit );   
dec_num 						this always keeps the decimal Value of num  
      

----------------------------------------------------------- public functions --------------------------------------------------
public function __construct($num,$base=10)		param  : $num = the number ( endoded with base ), [$base] the used base


public function getNum()   			 	param  : none
							return : the the encoded value 


public function getDec()   				param  : none
							return : the decimal value of num


public function getBase()  				param  : none 
							return : the used base


public function getMaxBase() 				param  : none 
							return : the highest valid value for base


public function toUpper() 				param  : none 
							return : none 
							purpose: changes the digit-set to upper Letters

public function toLower() 				param  : none 
							return : none 
							purpose: changes the digit-set to upper Letters


public function mixedDigits() 				param  : none 
							return : none 
							purpose: changes the digit-set to upper and lower Letters
							note   : "01234567890123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
                       						 with mixed set the "A" and "a" represent different values

		
public function getConvNum($base)			param  : the base to encode the number
							return : string with the encoded number
							purpose: retrieve a number encoded with bas
							note   : the func doesnt change(restores) the values of class members
  


public function setNum($value,$base=10)			param  : $num = the number ( endoded with base ), [$base] the used base 
							return : none
							purpose: change the values of an existing object
							


public function setBase($base)				param  : the new base
							return : none 
							purpose: change the used base ( and rebuild the encoded number )