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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\MathTrig;
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
class Helpers
{
/**
* Many functions accept null/false/true argument treated as 0/0/1.
*
* @return float|string quotient or DIV0 if denominator is too small
*/
public static function verySmallDenominator(float $numerator, float $denominator)
{
return (abs($denominator) < 1.0E-12) ? ExcelError::DIV0() : ($numerator / $denominator);
}
/**
* Many functions accept null/false/true argument treated as 0/0/1.
*
* @param mixed $number
*
* @return float|int
*/
public static function validateNumericNullBool($number)
{
$number = Functions::flattenSingleValue($number);
if ($number === null) {
return 0;
}
if (is_bool($number)) {
return (int) $number;
}
if (is_numeric($number)) {
return 0 + $number;
}
throw new Exception(ExcelError::throwError($number));
}
/**
* Validate numeric, but allow substitute for null.
*
* @param mixed $number
* @param null|float|int $substitute
*
* @return float|int
*/
public static function validateNumericNullSubstitution($number, $substitute)
{
$number = Functions::flattenSingleValue($number);
if ($number === null && $substitute !== null) {
return $substitute;
}
if (is_numeric($number)) {
return 0 + $number;
}
throw new Exception(ExcelError::throwError($number));
}
/**
* Confirm number >= 0.
*
* @param float|int $number
*/
public static function validateNotNegative($number, ?string $except = null): void
{
if ($number >= 0) {
return;
}
throw new Exception($except ?? ExcelError::NAN());
}
/**
* Confirm number > 0.
*
* @param float|int $number
*/
public static function validatePositive($number, ?string $except = null): void
{
if ($number > 0) {
return;
}
throw new Exception($except ?? ExcelError::NAN());
}
/**
* Confirm number != 0.
*
* @param float|int $number
*/
public static function validateNotZero($number): void
{
if ($number) {
return;
}
throw new Exception(ExcelError::DIV0());
}
public static function returnSign(float $number): int
{
return $number ? (($number > 0) ? 1 : -1) : 0;
}
public static function getEven(float $number): float
{
$significance = 2 * self::returnSign($number);
return $significance ? (ceil($number / $significance) * $significance) : 0;
}
/**
* Return NAN or value depending on argument.
*
* @param float $result Number
*
* @return float|string
*/
public static function numberOrNan($result)
{
return is_nan($result) ? ExcelError::NAN() : $result;
}
}
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