compareAsciiUpperCase function

*<Null safety>*

int compareAsciiUpperCase (String a, String b)

Implementation

int compareAsciiUpperCase(String a, String b) {
  var defaultResult = 0; // Returned if no difference found.
  for (var i = 0; i < a.length; i++) {
    if (i >= b.length) return 1;
    var aChar = a.codeUnitAt(i);
    var bChar = b.codeUnitAt(i);
    if (aChar == bChar) continue;
    // Upper-case if letters.
    var aUpperCase = aChar;
    var bUpperCase = bChar;
    if (_lowerCaseA <= aChar && aChar <= _lowerCaseZ) {
      aUpperCase -= _asciiCaseBit;
    }
    if (_lowerCaseA <= bChar && bChar <= _lowerCaseZ) {
      bUpperCase -= _asciiCaseBit;
    }
    if (aUpperCase != bUpperCase) return (aUpperCase - bUpperCase).sign;
    if (defaultResult == 0) defaultResult = (aChar - bChar);
  }
  if (b.length > a.length) return -1;
  return defaultResult.sign;
}