sink_scm 92 ext/charconv/convlib.c ScmObj sink_scm; sink_scm 104 ext/charconv/convlib.c sink_scm = SCM_ARGREF(0); sink_scm 105 ext/charconv/convlib.c if (!SCM_OPORTP(sink_scm)) Scm_Error("output port required, but got %S", sink_scm); sink_scm 106 ext/charconv/convlib.c sink = SCM_PORT(sink_scm);