isMaddToken static method

bool isMaddToken(String tok)

Determines if a token is a prolonged vocalic Madd sound (ا, آ, و, ي, ى, ۥ, ۦ, ٰ, ٱ, ٲ).

Implementation

static bool isMaddToken(String tok) {
  if (tok.isEmpty) return false;
  // Any token carrying an active vowel or consonant mark (Fathah, Dammah, Kasrah, Tanween, Sukoon, Shaddah)
  // is an articulated consonant syllable, NOT a pure unvoweled Madd vowel.
  for (int i = 0; i < tok.length; i++) {
    final int c = tok.codeUnitAt(i);
    if (c >= 0x064B && c <= 0x0652) { // ً ٌ ٍ َ ُ ِ ّ ْ
      return false;
    }
  }
  // Shaddah doubled consonants (e.g. ييَ, ووَ) without Madd markings are not Madd.
  if (isShaddahToken(tok) || isGhunnahToken(tok)) {
    return false;
  }
  for (int i = 0; i < tok.length; i++) {
    final int c = tok.codeUnitAt(i);
    if (c == 0x0627 || // ا
        c == 0x0622 || // آ
        c == 0x0648 || // و
        c == 0x064A || // ي
        c == 0x0649 || // ى
        c == 0x0670 || // ٰ
        c == 0x0671 || // ٱ
        c == 0x06E5 || // ۥ
        c == 0x06E6 || // ۦ
        c == 0x0672) { // ٲ
      return true;
    }
  }
  return false;
}