MimeB64DecoderInit (int (*output_fn) (const char *, PRInt32, void *),
MimeB64DecoderInit (nsresult (*output_fn) (const char *, PRInt32, void *),
MimeB64DecoderInit (int (*output_fn) (const char *, PRInt32, void *),					void *closure){  return mime_decoder_init (mime_Base64, output_fn, closure);}