Base85Decoder constructor
Implementation
Base85Decoder(this.alphabet, this.algo) {
_baseMap = Uint8List(256);
_baseMap.fillRange(0, _baseMap.length, 255);
for (var i = 0; i < alphabet.length; i++) {
var xc = alphabet.codeUnitAt(i);
if (_baseMap[xc] != 255) {
throw FormatException('${alphabet[i]} is ambiguous');
}
_baseMap[xc] = i;
}
}