fill_input_buf
while (! fill_input_buf (0))
if (fill_input_buf (1))
if (!fill_input_buf(rstrm, do_align))
if (!fill_input_buf(rstrm, FALSE))
if (! fill_input_buf(rstrm, frag_len))
if (! fill_input_buf(rstrm, cnt))
static bool_t fill_input_buf();