code: def _parse_decimal(buf):
      
      exponent = _parse_var_int(buf, signed=True)
      sign_bit, coefficient = _parse_signed_int_components(buf)
  
      if coefficient == 0:
          # Handle the zero cases--especially negative zero
          value = Decimal((sign_bit, (0,), exponent))
      else:
          coefficient *= sign_bit and -1 or 1
          value = Decimal(coefficient).scaleb(exponent)
  
      return value
docs: Parses the remainder of a file-like object as a decimal.