public static function Complex::_parseComplex in Loft Data Grids 6.2

Same name and namespace in other branches

1. 7.2 vendor/phpoffice/phpexcel/unitTests/custom/Complex.php \Complex::_parseComplex()

1 call to Complex::_parseComplex()

Complex::__construct in vendor/phpoffice/phpexcel/unitTests/custom/Complex.php

File

vendor/phpoffice/phpexcel/unitTests/custom/Complex.php, line 9

Class

Complex

Code

public static function _parseComplex($complexNumber) {

  //	Test for real number, with no imaginary part
  if (is_numeric($complexNumber)) {
    return array(
      $complexNumber,
      0,
      NULL,
    );
  }

  //	Fix silly human errors
  if (strpos($complexNumber, '+-') !== FALSE) {
    $complexNumber = str_replace('+-', '-', $complexNumber);
  }
  if (strpos($complexNumber, '++') !== FALSE) {
    $complexNumber = str_replace('++', '+', $complexNumber);
  }
  if (strpos($complexNumber, '--') !== FALSE) {
    $complexNumber = str_replace('--', '-', $complexNumber);
  }

  //	Basic validation of string, to parse out real and imaginary parts, and any suffix
  $validComplex = preg_match('/^([\\-\\+]?(\\d+\\.?\\d*|\\d*\\.?\\d+)([Ee][\\-\\+]?[0-2]?\\d{1,3})?)([\\-\\+]?(\\d+\\.?\\d*|\\d*\\.?\\d+)([Ee][\\-\\+]?[0-2]?\\d{1,3})?)?(([\\-\\+]?)([ij]?))$/ui', $complexNumber, $complexParts);
  if (!$validComplex) {

    //	Neither real nor imaginary part, so test to see if we actually have a suffix
    $validComplex = preg_match('/^([\\-\\+]?)([ij])$/ui', $complexNumber, $complexParts);
    if (!$validComplex) {
      throw new Exception('COMPLEX: Invalid complex number');
    }

    //	We have a suffix, so set the real to 0, the imaginary to either 1 or -1 (as defined by the sign)
    $imaginary = 1;
    if ($complexParts[1] === '-') {
      $imaginary = 0 - $imaginary;
    }
    return array(
      0,
      $imaginary,
      $complexParts[2],
    );
  }

  //	If we don't have an imaginary part, identify whether it should be +1 or -1...
  if ($complexParts[4] === '' && $complexParts[9] !== '') {
    if ($complexParts[7] !== $complexParts[9]) {
      $complexParts[4] = 1;
      if ($complexParts[8] === '-') {
        $complexParts[4] = -1;
      }

      //	... or if we have only the real and no imaginary part (in which case our real should be the imaginary)
    }
    else {
      $complexParts[4] = $complexParts[1];
      $complexParts[1] = 0;
    }
  }

  //	Return real and imaginary parts and suffix as an array, and set a default suffix if user input lazily
  return array(
    $complexParts[1],
    $complexParts[4],
    !empty($complexParts[9]) ? $complexParts[9] : 'i',
  );
}