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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\Engineering;
use PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
class BitWise
{
use ArrayEnabled;
const SPLIT_DIVISOR = 2 ** 24;
/**
* Split a number into upper and lower portions for full 32-bit support.
*
* @param float|int $number
*/
private static function splitNumber($number): array
{
return [floor($number / self::SPLIT_DIVISOR), fmod($number, self::SPLIT_DIVISOR)];
}
/**
* BITAND.
*
* Returns the bitwise AND of two integer values.
*
* Excel Function:
* BITAND(number1, number2)
*
* @param array|int $number1
* Or can be an array of values
* @param array|int $number2
* Or can be an array of values
*
* @return array|int|string
* If an array of numbers is passed as an argument, then the returned result will also be an array
* with the same dimensions
*/
public static function BITAND($number1, $number2)
{
if (is_array($number1) || is_array($number2)) {
return self::evaluateArrayArguments([self::class, __FUNCTION__], $number1, $number2);
}
try {
$number1 = self::validateBitwiseArgument($number1);
$number2 = self::validateBitwiseArgument($number2);
} catch (Exception $e) {
return $e->getMessage();
}
$split1 = self::splitNumber($number1);
$split2 = self::splitNumber($number2);
return self::SPLIT_DIVISOR * ($split1[0] & $split2[0]) + ($split1[1] & $split2[1]);
}
/**
* BITOR.
*
* Returns the bitwise OR of two integer values.
*
* Excel Function:
* BITOR(number1, number2)
*
* @param array|int $number1
* Or can be an array of values
* @param array|int $number2
* Or can be an array of values
*
* @return array|int|string
* If an array of numbers is passed as an argument, then the returned result will also be an array
* with the same dimensions
*/
public static function BITOR($number1, $number2)
{
if (is_array($number1) || is_array($number2)) {
return self::evaluateArrayArguments([self::class, __FUNCTION__], $number1, $number2);
}
try {
$number1 = self::validateBitwiseArgument($number1);
$number2 = self::validateBitwiseArgument($number2);
} catch (Exception $e) {
return $e->getMessage();
}
$split1 = self::splitNumber($number1);
$split2 = self::splitNumber($number2);
return self::SPLIT_DIVISOR * ($split1[0] | $split2[0]) + ($split1[1] | $split2[1]);
}
/**
* BITXOR.
*
* Returns the bitwise XOR of two integer values.
*
* Excel Function:
* BITXOR(number1, number2)
*
* @param array|int $number1
* Or can be an array of values
* @param array|int $number2
* Or can be an array of values
*
* @return array|int|string
* If an array of numbers is passed as an argument, then the returned result will also be an array
* with the same dimensions
*/
public static function BITXOR($number1, $number2)
{
if (is_array($number1) || is_array($number2)) {
return self::evaluateArrayArguments([self::class, __FUNCTION__], $number1, $number2);
}
try {
$number1 = self::validateBitwiseArgument($number1);
$number2 = self::validateBitwiseArgument($number2);
} catch (Exception $e) {
return $e->getMessage();
}
$split1 = self::splitNumber($number1);
$split2 = self::splitNumber($number2);
return self::SPLIT_DIVISOR * ($split1[0] ^ $split2[0]) + ($split1[1] ^ $split2[1]);
}
/**
* BITLSHIFT.
*
* Returns the number value shifted left by shift_amount bits.
*
* Excel Function:
* BITLSHIFT(number, shift_amount)
*
* @param array|int $number
* Or can be an array of values
* @param array|int $shiftAmount
* Or can be an array of values
*
* @return array|float|int|string
* If an array of numbers is passed as an argument, then the returned result will also be an array
* with the same dimensions
*/
public static function BITLSHIFT($number, $shiftAmount)
{
if (is_array($number) || is_array($shiftAmount)) {
return self::evaluateArrayArguments([self::class, __FUNCTION__], $number, $shiftAmount);
}
try {
$number = self::validateBitwiseArgument($number);
$shiftAmount = self::validateShiftAmount($shiftAmount);
} catch (Exception $e) {
return $e->getMessage();
}
$result = floor($number * (2 ** $shiftAmount));
if ($result > 2 ** 48 - 1) {
return ExcelError::NAN();
}
return $result;
}
/**
* BITRSHIFT.
*
* Returns the number value shifted right by shift_amount bits.
*
* Excel Function:
* BITRSHIFT(number, shift_amount)
*
* @param array|int $number
* Or can be an array of values
* @param array|int $shiftAmount
* Or can be an array of values
*
* @return array|float|int|string
* If an array of numbers is passed as an argument, then the returned result will also be an array
* with the same dimensions
*/
public static function BITRSHIFT($number, $shiftAmount)
{
if (is_array($number) || is_array($shiftAmount)) {
return self::evaluateArrayArguments([self::class, __FUNCTION__], $number, $shiftAmount);
}
try {
$number = self::validateBitwiseArgument($number);
$shiftAmount = self::validateShiftAmount($shiftAmount);
} catch (Exception $e) {
return $e->getMessage();
}
$result = floor($number / (2 ** $shiftAmount));
if ($result > 2 ** 48 - 1) { // possible because shiftAmount can be negative
return ExcelError::NAN();
}
return $result;
}
/**
* Validate arguments passed to the bitwise functions.
*
* @param mixed $value
*
* @return float
*/
private static function validateBitwiseArgument($value)
{
$value = self::nullFalseTrueToNumber($value);
if (is_numeric($value)) {
$value = (float) $value;
if ($value == floor($value)) {
if (($value > 2 ** 48 - 1) || ($value < 0)) {
throw new Exception(ExcelError::NAN());
}
return floor($value);
}
throw new Exception(ExcelError::NAN());
}
throw new Exception(ExcelError::VALUE());
}
/**
* Validate arguments passed to the bitwise functions.
*
* @param mixed $value
*
* @return int
*/
private static function validateShiftAmount($value)
{
$value = self::nullFalseTrueToNumber($value);
if (is_numeric($value)) {
if (abs($value) > 53) {
throw new Exception(ExcelError::NAN());
}
return (int) $value;
}
throw new Exception(ExcelError::VALUE());
}
/**
* Many functions accept null/false/true argument treated as 0/0/1.
*
* @param mixed $number
*
* @return mixed
*/
private static function nullFalseTrueToNumber(&$number)
{
if ($number === null) {
$number = 0;
} elseif (is_bool($number)) {
$number = (int) $number;
}
return $number;
}
}
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