public function Fraction::fromDecimal in Fraction 7

Calculates the numerator and denominator from a decimal value.

Parameters

$value: The decimal value to start with.

Return value

Fraction Returns this Fraction object.

File

./fraction.class.inc, line 188

Fraction class

Class

Fraction

@file Fraction class

Code

public function fromDecimal($value) {

  // Calculate the precision by counting the number of decimal places.
  $precision = drupal_strlen(drupal_substr(strrchr($value, '.'), 1));

  // Create the denominator by raising 10 to the power of the precision.
  if (function_exists('bcpow')) {
    $denominator = bcpow(10, $precision);
  }
  else {
    $denominator = pow(10, $precision);
  }

  // Calculate the numerator by multiplying the value by the denominator.
  if (function_exists('bcmul')) {
    $numerator = bcmul($value, $denominator, 0);
  }
  else {
    $numerator = $value * $denominator;
  }

  // Set the numerator and denominator.
  $this
    ->setNumerator($numerator);
  $this
    ->setDenominator($denominator);
  return $this;
}