parse method

@override void parse(Uint8List content)

Implementation

@override
void parse(final Uint8List content) {
  final tlv = TLV.fromBytes(content);
  if (tlv.tag != TAG) {
    throw EfParseError(
        "Invalid EF.COM tag=${tlv.tag.hex()}, expected tag=${TAG.hex()}");
  }

  // Parse version number
  final data = tlv.value;
  final vtv = TLV.decode(data);
  if (vtv.tag.value != 0x5F01) {
    throw EfParseError(
        "Invalid version object tag=${vtv.tag.value.hex()}, expected version object with tag=5F01");
  }
  _ver = String.fromCharCodes(vtv.value);

  // Parse string version
  final uvtv = TLV.decode(data.sublist(vtv.encodedLen));
  if (uvtv.tag.value != 0x5F36) {
    throw EfParseError(
        "Invalid unicode version object tag=${uvtv.tag.value.hex()}, expected unicode version object with tag=5F36");
  }
  _uver = String.fromCharCodes(uvtv.value);

  // Parse tag list
  final tvTagList =
      TLV.decode(data.sublist(vtv.encodedLen + uvtv.encodedLen));
  if (tvTagList.tag.value != 0x5C) {
    throw EfParseError(
        "Invalid tag list object tag=${tvTagList.tag.value.hex()}, expected tag list object with tag=5C");
  }

  // fill _tags set.
  // Each tag should be represented as 1 byte
  for (final t in tvTagList.value) {
    _tags.add(DgTag(t));
  }
}