toc              1439 src/extlib.c     long fromc = -1, toc = -1;
toc              1444 src/extlib.c     if (SCM_EXACTP(to)) toc = Scm_GetInteger(to);
toc              1445 src/extlib.c     else if (SCM_CHARP(to)) toc = SCM_CHAR_VALUE(to);
toc              1446 src/extlib.c     if (toc < 0) Scm_Error("character or positive integer required, but got %S", to);
toc              1447 src/extlib.c     if (toc > SCM_CHAR_MAX) Scm_Error("argument out of range: %S", to);
toc              1448 src/extlib.c     SCM_RETURN(Scm_CharSetAddRange(cs, (ScmChar)fromc, (ScmChar)toc));