发送E-mail时用的BASE64编码- Transmits when E-mail uses BASE64 codes

与base 64有关的网络编程，internet编程，http编程-http_base64.h Header file for base64 function(s). * Created: Christopher Blizzard <blizzard@appliedtheory.com>, 20-Nov-1998 * * Copyright (C) 1998 Free Software Foundation * * This library is free so