decodeProtocolCell function

Object? decodeProtocolCell(Uint8List data, int odbcType)

Converts binary cell data to a Dart value based on the protocol discriminant.

Implementation

Object? decodeProtocolCell(Uint8List data, int odbcType) {
  final type = OdbcType.fromDiscriminant(odbcType);
  if (type == OdbcType.binary) {
    return data;
  }
  if (type == OdbcType.integer) {
    if (data.length >= 4) {
      return readInt32Le(data);
    }
    return decodeProtocolText(data);
  }
  if (type == OdbcType.bigInt) {
    if (data.length >= 8) {
      return readInt64Le(data);
    }
    return decodeProtocolText(data);
  }
  if (type == OdbcType.float || type == OdbcType.doublePrecision) {
    // Dual-support: prefer ASCII float text (incl. "Infinity"/"NaN"), then
    // 8-byte LE IEEE-754 from native cell_reader / block_fetch.
    final parsed = tryParseAsciiFloat64(data);
    if (parsed != null) {
      return parsed;
    }
    if (data.length == 8) {
      return ByteData.sublistView(data).getFloat64(0, Endian.little);
    }
    return decodeProtocolText(data);
  }
  if (type == OdbcType.boolean) {
    // Dual-support: single 0/1 byte or ASCII bool text.
    if (data.length == 1 && (data[0] == 0 || data[0] == 1)) {
      return data[0] == 1;
    }
    final parsed = tryParseAsciiBool(data);
    if (parsed != null) {
      return parsed;
    }
    return decodeProtocolText(data);
  }
  if (type == OdbcType.smallInt) {
    final parsed = tryParseAsciiInt(data);
    if (parsed != null) {
      return parsed;
    }
    return decodeProtocolText(data);
  }
  if (type == OdbcType.date ||
      type == OdbcType.timestamp ||
      type == OdbcType.timestampWithTz ||
      type == OdbcType.datetimeOffset ||
      type == OdbcType.time) {
    final parsed = tryParseAsciiDateTime(data);
    if (parsed != null) {
      return parsed;
    }
    return decodeProtocolText(data);
  }
  return decodeProtocolText(data);
}