If @automatic_eos is %TRUE, @src will automatically go EOS if a buffer
after the total size is returned. By default this is %TRUE but sources
that can't return an authoritative size and only know that they're EOS
when trying to read more should set this to %FALSE.
If @automatic_eos is %TRUE, @src will automatically go EOS if a buffer after the total size is returned. By default this is %TRUE but sources that can't return an authoritative size and only know that they're EOS when trying to read more should set this to %FALSE.