Scm_DirName      2623 src/gauche.h   SCM_EXTERN ScmObj Scm_DirName(ScmString *filename);
Scm_DirName       670 src/load.c             ScmObj dir = Scm_DirName(lafile);
Scm_DirName       143 src/syslib.c   SCM_RESULT = Scm_DirName(pathname);