source_scm 44 ext/charconv/convlib.c ScmObj source_scm; source_scm 58 ext/charconv/convlib.c source_scm = SCM_ARGREF(0); source_scm 59 ext/charconv/convlib.c if (!SCM_IPORTP(source_scm)) Scm_Error("input port required, but got %S", source_scm); source_scm 60 ext/charconv/convlib.c source = SCM_PORT(source_scm);