import "stdUtils.scrypt";




library _opcat_labs_scrypt_ts_opcat_4_0_0__rs__ByteStringReader {
  bytes buf;
  int pos;
  constructor(bytes buf) {
    this.buf = buf;
    this.pos = 0;
  }
  function eof() : bool {
    return this.pos >= len(this.buf);
  }
  function readBytes() : bytes {
    int l = 0;
    bytes buf = this.buf;
    bytes ret = b'';
    int header = unpack(this.buf[this.pos : this.pos + 1]);
    this.pos++;
    if(header < 76) {
        l = header;
        ret = buf[this.pos : this.pos + l];
      } else if(header == 76) {
        l = _opcat_labs_scrypt_ts_opcat_4_0_0__rs__StdUtils.fromLEUnsigned(buf[this.pos : this.pos + 1]);
        this.pos += 1;
        ret = this.buf[this.pos : this.pos + l];
      } else if(header == 77) {
        l = _opcat_labs_scrypt_ts_opcat_4_0_0__rs__StdUtils.fromLEUnsigned(this.buf[this.pos : this.pos + 2]);
        this.pos += 2;
        ret = this.buf[this.pos : this.pos + l];
      } else if(header == 78) {
        l = _opcat_labs_scrypt_ts_opcat_4_0_0__rs__StdUtils.fromLEUnsigned(this.buf[this.pos : this.pos + 4]);
        this.pos += 4;
        ret = this.buf[this.pos : this.pos + l];
      } else {
        require(false);
      }
    this.pos += l;
    return ret;
  }
  function readBool() : bool {
    bytes buf = this.buf[this.pos : this.pos + 1];
    this.pos++;
    return b'00' != buf;
  }
  function readVarint() : int {
    bytes ret = b'';
    bytes header = this.buf[this.pos : this.pos + 1];
    this.pos++;
    if(header == _opcat_labs_scrypt_ts_opcat_4_0_0__rs__StdUtils.VARINT_2BYTE) {
        ret = this.buf[this.pos : this.pos + 2];
        this.pos += 2;
      } else if(header == _opcat_labs_scrypt_ts_opcat_4_0_0__rs__StdUtils.VARINT_4BYTE) {
        ret = this.buf[this.pos : this.pos + 4];
        this.pos += 4;
      } else if(header == _opcat_labs_scrypt_ts_opcat_4_0_0__rs__StdUtils.VARINT_8BYTE) {
        ret = this.buf[this.pos : this.pos + 8];
        this.pos += 8;
      } else {
        ret = header;
      }
    return _opcat_labs_scrypt_ts_opcat_4_0_0__rs__StdUtils.fromLEUnsigned(ret);
  }
}