coding_attr_for_unibyte 11063 src/coding.c     ASET (attrs, coding_attr_for_unibyte, NILP (val) ? Qnil : Qt);
coding_attr_for_unibyte  161 src/coding.h   #define CODING_ATTR_FOR_UNIBYTE(attrs)	AREF (attrs, coding_attr_for_unibyte)