BIO_f_buffer
btmp = BIO_new(BIO_f_buffer());
bufbio = BIO_new(BIO_f_buffer());
BIO *fbio = BIO_new(BIO_f_buffer());
BIO *fbio = BIO_new(BIO_f_buffer());
BIO *fbio = BIO_new(BIO_f_buffer());
io = BIO_new(BIO_f_buffer());
bf = BIO_new(BIO_f_buffer());
if (!(tmpbuf = BIO_new(BIO_f_buffer()))) {
const BIO_METHOD *BIO_f_buffer(void);
if ((buf = BIO_new(BIO_f_buffer())) == NULL)
bbio = BIO_new(BIO_f_buffer());