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<?php |
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namespace PhpOffice\PhpSpreadsheet\Calculation; |
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use PhpOffice\PhpSpreadsheet\Shared\StringHelper; |
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class BinaryComparison |
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{ |
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/** |
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* Epsilon Precision used for comparisons in calculations. |
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*/ |
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private const DELTA = 0.1e-12; |
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/** |
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* Compare two strings in the same way as strcmp() except that lowercase come before uppercase letters. |
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* |
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* @param null|string $str1 First string value for the comparison |
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* @param null|string $str2 Second string value for the comparison |
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*/ |
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private static function strcmpLowercaseFirst($str1, $str2): int |
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{ |
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$inversedStr1 = StringHelper::strCaseReverse($str1 ?? ''); |
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$inversedStr2 = StringHelper::strCaseReverse($str2 ?? ''); |
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return strcmp($inversedStr1, $inversedStr2); |
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} |
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/** |
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* PHP8.1 deprecates passing null to strcmp. |
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* |
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* @param null|string $str1 First string value for the comparison |
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* @param null|string $str2 Second string value for the comparison |
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*/ |
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private static function strcmpAllowNull($str1, $str2): int |
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{ |
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return strcmp($str1 ?? '', $str2 ?? ''); |
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} |
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public static function compare(mixed $operand1, mixed $operand2, string $operator): bool |
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{ |
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// Simple validate the two operands if they are string values |
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if (is_string($operand1) && $operand1 > '' && $operand1[0] == Calculation::FORMULA_STRING_QUOTE) { |
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$operand1 = Calculation::unwrapResult($operand1); |
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} |
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if (is_string($operand2) && $operand2 > '' && $operand2[0] == Calculation::FORMULA_STRING_QUOTE) { |
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$operand2 = Calculation::unwrapResult($operand2); |
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} |
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// Use case insensitive comparaison if not OpenOffice mode |
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if (Functions::getCompatibilityMode() != Functions::COMPATIBILITY_OPENOFFICE) { |
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if (is_string($operand1)) { |
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$operand1 = StringHelper::strToUpper($operand1); |
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} |
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if (is_string($operand2)) { |
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$operand2 = StringHelper::strToUpper($operand2); |
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} |
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} |
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$useLowercaseFirstComparison = is_string($operand1) && |
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is_string($operand2) && |
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Functions::getCompatibilityMode() === Functions::COMPATIBILITY_OPENOFFICE; |
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return self::evaluateComparison($operand1, $operand2, $operator, $useLowercaseFirstComparison); |
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} |
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private static function evaluateComparison(mixed $operand1, mixed $operand2, string $operator, bool $useLowercaseFirstComparison): bool |
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{ |
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return match ($operator) { |
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'=' => self::equal($operand1, $operand2), |
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'>' => self::greaterThan($operand1, $operand2, $useLowercaseFirstComparison), |
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'<' => self::lessThan($operand1, $operand2, $useLowercaseFirstComparison), |
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'>=' => self::greaterThanOrEqual($operand1, $operand2, $useLowercaseFirstComparison), |
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'<=' => self::lessThanOrEqual($operand1, $operand2, $useLowercaseFirstComparison), |
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'<>' => self::notEqual($operand1, $operand2), |
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default => throw new Exception('Unsupported binary comparison operator'), |
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}; |
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} |
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private static function equal(mixed $operand1, mixed $operand2): bool |
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{ |
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if (is_numeric($operand1) && is_numeric($operand2)) { |
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$result = (abs($operand1 - $operand2) < self::DELTA); |
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} elseif (($operand1 === null && is_numeric($operand2)) || ($operand2 === null && is_numeric($operand1))) { |
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$result = $operand1 == $operand2; |
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} else { |
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$result = self::strcmpAllowNull($operand1, $operand2) == 0; |
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} |
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return $result; |
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} |
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private static function greaterThanOrEqual(mixed $operand1, mixed $operand2, bool $useLowercaseFirstComparison): bool |
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{ |
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if (is_numeric($operand1) && is_numeric($operand2)) { |
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$result = ((abs($operand1 - $operand2) < self::DELTA) || ($operand1 > $operand2)); |
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} elseif (($operand1 === null && is_numeric($operand2)) || ($operand2 === null && is_numeric($operand1))) { |
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$result = $operand1 >= $operand2; |
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} elseif ($useLowercaseFirstComparison) { |
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$result = self::strcmpLowercaseFirst($operand1, $operand2) >= 0; |
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} else { |
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$result = self::strcmpAllowNull($operand1, $operand2) >= 0; |
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} |
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return $result; |
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} |
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private static function lessThanOrEqual(mixed $operand1, mixed $operand2, bool $useLowercaseFirstComparison): bool |
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{ |
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if (is_numeric($operand1) && is_numeric($operand2)) { |
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$result = ((abs($operand1 - $operand2) < self::DELTA) || ($operand1 < $operand2)); |
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} elseif (($operand1 === null && is_numeric($operand2)) || ($operand2 === null && is_numeric($operand1))) { |
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$result = $operand1 <= $operand2; |
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} elseif ($useLowercaseFirstComparison) { |
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$result = self::strcmpLowercaseFirst($operand1, $operand2) <= 0; |
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} else { |
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$result = self::strcmpAllowNull($operand1, $operand2) <= 0; |
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} |
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return $result; |
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} |
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private static function greaterThan(mixed $operand1, mixed $operand2, bool $useLowercaseFirstComparison): bool |
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{ |
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return self::lessThanOrEqual($operand1, $operand2, $useLowercaseFirstComparison) !== true; |
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} |
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private static function lessThan(mixed $operand1, mixed $operand2, bool $useLowercaseFirstComparison): bool |
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{ |
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return self::greaterThanOrEqual($operand1, $operand2, $useLowercaseFirstComparison) !== true; |
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} |
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private static function notEqual(mixed $operand1, mixed $operand2): bool |
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{ |
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return self::equal($operand1, $operand2) !== true; |
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} |
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} |
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PHPOffice /
PhpSpreadsheet
