/**
* Subtract currencies using integers instead of floats, to preserve precision
*
+ * @param string|float $leftOp
+ * @param string|float $rightOp
+ * @param string $currency
+ *
* @return float
* Result of subtracting $rightOp from $leftOp to the precision of $currency
*/
/**
* Tests if two currency values are equal, taking into account the currency's
- * precision, so that if the difference between the two values is less than
- * one more order of magnitude for the precision, then the values are
- * considered as equal. So, if the currency has precision of 2 decimal
- * points, a difference of more than 0.001 will cause the values to be
- * considered as different. Anything less than 0.001 will be considered as
- * equal.
+ * precision, so that the two values are compared as integers after rounding.
*
* Eg.
*
- * 1.2312 == 1.2319 with a currency precision of 2 decimal points
- * 1.2310 != 1.2320 with a currency precision of 2 decimal points
- * 1.3000 != 1.2000 with a currency precision of 2 decimal points
+ * 1.231 == 1.232 with a currency precision of 2 decimal points
+ * 1.234 != 1.236 with a currency precision of 2 decimal points
+ * 1.300 != 1.200 with a currency precision of 2 decimal points
*
* @param $value1
* @param $value2
* @return bool
*/
public static function equals($value1, $value2, $currency) {
- $precision = 1 / pow(10, self::getCurrencyPrecision($currency) + 1);
- $difference = self::subtractCurrencies($value1, $value2, $currency);
-
- if (abs($difference) > $precision) {
- return FALSE;
- }
+ $precision = pow(10, self::getCurrencyPrecision($currency));
- return TRUE;
+ return (int) round($value1 * $precision) == (int) round($value2 * $precision);
}
/**