UTF8_SET_WIDTH
*uc = UTF8_SET_SIZE(ud->size)|UTF8_SET_WIDTH(ud->width)|index;
*uc = UTF8_SET_SIZE(0)|UTF8_SET_WIDTH(0);
*uc = UTF8_SET_SIZE(1)|UTF8_SET_WIDTH(1)|0x20;
*uc = UTF8_SET_SIZE(1)|UTF8_SET_WIDTH(1)|0x2020;
return (UTF8_SET_SIZE(1)|UTF8_SET_WIDTH(1)|ch);