933 	unsigned char sch, dch;  in map()  local
972 		for (; (sch = (unsigned char)*from) != '\0'; from++) {  in map()
973 			if (!mimic_gnu || !found[sch]) {  in map()
974 				found[sch] = 1;  in map()
975 				mapvec[sch] = *to;  in map()
982 			for (; (sch = (unsigned char)*src) != '\0'; src++) {  in map()
983 				if (!found[sch])  in map()
984 					*dest++ = sch;  in map()
985 				else if ((dch = mapvec[sch]) != '\0')  in map()
990 				sch = (unsigned char)(*src++);  in map()
991 				dch = mapvec[sch];  in map()
992 				while (dch != sch) {  in map()
993 					sch = dch;  in map()
994 					dch = mapvec[sch];  in map()