<?php
/**********************************************************************************************************
*
* byte converter class
* @filename: byte_converter.class.php
* Php version PHP5.
* version: 0.2
* @author: Ersin Guvenc <eguvenc@gmail.com> (C) 2008 - 2009.
* Web: http://develturk.com
* @license http://opensource.org/licenses/lgpl-license.php GNU Lesser General Public License Version 2.1
*
*/
//some details .. http://en.wikipedia.org/wiki/Byte
//catch all error.. you can customize exception class.look at php5 manual.
//Thanks Leo Venturini for some bugs in version 0.1.
Class byte_Exception extends Exception
{
function __toString(){
return __CLASS__ . ": [Error]: {$this->getMessage()} [Line]: {$this->getLine()}\n";
}
}
/* Simple Calculator */
Class calc
{
private static $meter = "1024";
//static function compute
public static function compute($input,$operator,$iterate){
switch ($operator) {
case '*':
$total = $input * self::$meter;
for($i=1; $i<=$iterate-1; $i++)
$total = $total * self::$meter;
break;
case '/':
$total = $input / self::$meter;
for($i=1; $i<=$iterate-1; $i++)
$total = $total / self::$meter;
break;
}
return $total;
}
}
Class byte_converter
{
public $format = ""; //incoming format string.
public $toFormat = ""; //output format string.
public $integer = ""; //input number integer.
/* data types array */
public $type = array('b', //0 byte
'kb', //1 kilo
'mb', //2 mega
'gb', //3 giga
'tb', //4 tera
'pb', //5 peta
'eb', //6 exa
'zb', //7 zetta
'yb'); //8 yotta
public $limit = ""; //calculate limit for data types..
private $result = array(); //auto convert result associative array.
function _set_params($integer,$format,$toFormat)
{
$this->integer = $integer;
$this->format = strtolower($format);
$this->toFormat = $toFormat;
//$this->cut_array($this->limit);
}
//set limit for control the data types..
function set_limit($type)
{
$this->limit = $type;
}
/* get right operator */
function get_operator()
{
if($this->get_key($this->format) > $this->get_key($this->toFormat))
{
$operator = "*";
}elseif($this->get_key($this->format) < $this->get_key($this->toFormat))
{
$operator = "/";
}
return $operator;
}
/* get key type */
function get_key($type)
{
$key = array_keys($this->type,$type);
return $key[0];
}
/* start manual convert process*/
function convert($integer,$format,$toFormat)
{
$this->_set_params($integer,$format,$toFormat);
$iterate = $this->get_key($this->format) - $this->get_key($this->toFormat);
if($iterate < 0)
$iterate = $iterate * -1; //turn to positive
$operator = $this->get_operator();
return calc::compute($this->integer,$operator,$iterate);
} //end convert method
/* cut array function for limit to data types.. */
function cut_array($input='')
{
if($input == "")
return FALSE;
$key = $this->get_key($input);
$this->type = array_slice($this->type, 0, $key);
}
/* basic array delete. */
function array_delete($array,$val)
{
if(!in_array($val,$this->type,true))
throw new byte_Exception('This is not an array ! '.__FUNCTION__.' error!');
$new = array();
foreach($array as $k=>$v)
{
if(is_array($v))
throw new byte_Exception('This is not a flat array ! '.__FUNCTION__.' error!');
if($val !== $v)
{
$new[$k] = $v;
}
}
return $new;
}
/* auto convert to another formats it returns associative array */
function auto($integer,$format)
{
//get new types except $format
$this->cut_array($this->limit);
$new_types = $this->array_delete($this->type,$format);
//run auto convert
$result = array();
foreach($new_types as $toFormat)
{
//$byte = new byte_converter;
$this->result[$toFormat] = $this->convert($integer,$format,$toFormat);
}
return $this->result;
}
} //end of the byte converter class...
/* EXAMPLE MANUAL CONVERT
try{
$byte = new byte_converter;
$total = $byte->convert("128849018880","b","kb");
echo $total;
}catch(Exception $e) {echo $e;}
//OUTPUT 125829120
/* EXAMPLE AUTO COVERT
try{
$byte = new byte_converter;
$byte->set_limit("tb"); //show types which before the tera byte
$result = $byte->auto("1048576000","kb");
print_r($result);
}catch (Exception $e) {echo $e;}
//OUTPUT
Array (
[b] => 1073741824000
[mb] => 1024000
[gb]=> 1000
//limit
[tb] => 0.9765625
[pb] => 0.000953674316406
[eb] => 9.31322574615E-7
[zb] => 9.09494701773E-10
[yb] => 8.881784197E-13 )
*/
?>
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