readString method

Implementation

@override
String readString([String? label]) {
  int length = readUint32();
  int end = _readIndex + length;
  StringBuffer stringBuffer = StringBuffer();

  while (_readIndex < end) {
    int c1 = readUint8();
    if (c1 < 128) {
      stringBuffer.writeCharCode(c1);
    } else if (c1 > 191 && c1 < 224) {
      int c2 = readUint8();
      stringBuffer.writeCharCode((c1 & 31) << 6 | c2 & 63);
    } else if (c1 > 239 && c1 < 365) {
      int c2 = readUint8();
      int c3 = readUint8();
      int c4 = readUint8();
      int u = ((c1 & 7) << 18 | (c2 & 63) << 12 | (c3 & 63) << 6 | c4 & 63) -
          0x10000;
      stringBuffer.writeCharCode(0xD800 + (u >> 10));
      stringBuffer.writeCharCode(0xDC00 + (u & 1023));
    } else {
      int c2 = readUint8();
      int c3 = readUint8();
      stringBuffer.writeCharCode((c1 & 15) << 12 | (c2 & 63) << 6 | c3 & 63);
    }
  }
  return stringBuffer.toString();
}