do_write

# File ext/openssl/lib/openssl/buffering.rb, line 307
  def do_write(s)
    @wbuffer = "" unless defined? @wbuffer
    @wbuffer << s
    @wbuffer.force_encoding(Encoding::BINARY)
    @sync ||= false
    if @sync or @wbuffer.size > BLOCK_SIZE or idx = @wbuffer.rindex($/)
      remain = idx ? idx + $/.size : @wbuffer.length
      nwritten = 0
      while remain > 0
        str = @wbuffer[nwritten,remain]
        begin
          nwrote = syswrite(str)
        rescue Errno::EAGAIN
          retry
        end
        remain -= nwrote
        nwritten += nwrote
      end
      @wbuffer[0,nwritten] = ""
    end
  end