/**
* Converts any positive integer between any two bases ranging from `2` to `16`
*
* @param fNumber|string $number The positive integer to convert
* @param integer $from_base The base to convert from - must be between `2` and `16`
* @param integer $to_base The base to convert to - must be between `2` and `16`
* @return string The number converted to the new base
*/
public static function baseConvert($number, $from_base, $to_base)
{
if ($number instanceof fNumber && $from_base != 10) {
throw new fProgrammerException('The from base specified, %s, is not valid for an fNumber object', $from_base);
}
if (strlen($number) && $number[0] == '+') {
$number = substr($number, 1);
}
if (!ctype_xdigit($number)) {
throw new fProgrammerException('The number specified, %s, does not appear to be a positive integer. Negative numbers and fractions are not supported due the different encoding schemes that can be used.', $number);
}
if (!is_numeric($from_base) || $from_base < 2 || $from_base > 16) {
throw new fProgrammerException('The from base specified, %1$s, is not valid base between %2$s and %3$s', $from_base, '2', '16');
}
if (!is_numeric($to_base) || $to_base < 2 || $to_base > 16) {
throw new fProgrammerException('The to base specified, %1$s, is not valid base between %2$s and %3$s', $from_base, '2', '16');
}
$base_string = '0123456789ABCDEF';
$base_map = array('A' => 10, 'B' => 11, 'C' => 12, 'D' => 13, 'E' => 14, 'F' => 15);
/* Convert input number to base 10 */
if ($from_base != 10) {
$length = strlen($number);
$decimal = new fNumber('0');
$base_num = new fNumber($from_base);
for ($i = 0; $i < $length; $i++) {
$char = strtoupper($number[$i]);
$value = new fNumber(isset($base_map[$char]) ? $base_map[$char] : $char);
$decimal = $decimal->add($value->mul($base_num->pow($length - ($i + 1)))->round(0));
}
} elseif (!$number instanceof fNumber) {
$decimal = new fNumber($number);
} else {
$decimal = $number;
}
$output = '';
if ($to_base != 10) {
do {
$frac = $decimal->div($to_base, 3)->__toString();
$frac = '0' . substr($frac, strpos($frac, '.'));
$x = (int) ($frac * $to_base + 1.5);
$output = $base_string[$x - 1] . $output;
$decimal = $decimal->div($to_base, 0);
} while ($decimal->gt('0.0'));
} else {
$output = $decimal->__toString();
}
return $output;
}
/**
* Mupltiplies this monetary value times the number passed
*
* @throws fValidationException When `$multiplicand` is not a valid number
*
* @param fNumber|string|integer $multiplicand The number of times to multiply this ammount - don't use a float since they are imprecise
* @return fMoney The product of the monetary value and the multiplicand passed
*/
public function mul($multiplicand)
{
$precision = self::getCurrencyInfo($this->currency, 'precision');
$new_amount = $this->amount->mul($multiplicand, $precision + 1)->round($precision);
return new fMoney($new_amount, $this->currency);
}
/**
* @dataProvider invalidNumProvider
* @expectedException fValidationException
*/
public function testMulFail($number)
{
$num = new fNumber('1');
$num->mul($number);
}
