+#define MIN_LEADING_BYTE -0x60
+#define CHARSET_ID_OFFSET 0x00
+
+/* ISO/IEC 10646 */
+#define LEADING_BYTE_UCS (CHARSET_ID_OFFSET - 1)
+
+/* represent normal 80-9F */
+#define LEADING_BYTE_CONTROL_1 (CHARSET_ID_OFFSET - 2)
+
+/* ISO/IEC 10646 BMP */
+#define LEADING_BYTE_UCS_BMP (CHARSET_ID_OFFSET - 3)
+
+/* VISCII 1.1 */
+#define LEADING_BYTE_LATIN_VISCII (CHARSET_ID_OFFSET - 4)
+
+/* MULE VISCII-LOWER (CHARSET_ID_OFFSET_96 + '1') */
+#define LEADING_BYTE_LATIN_VISCII_LOWER (CHARSET_ID_OFFSET - 5)
+
+/* MULE VISCII-UPPER (CHARSET_ID_OFFSET_96 + '2') */
+#define LEADING_BYTE_LATIN_VISCII_UPPER (CHARSET_ID_OFFSET - 6)
+
+/* Big5 Level 1 2/4 2/{(8),9,10,11} 4/0 '0' */
+#define LEADING_BYTE_CHINESE_BIG5_1 (CHARSET_ID_OFFSET - 7)
+
+/* Big5 Level 2 2/4 2/{(8),9,10,11} 4/0 '1' */
+#define LEADING_BYTE_CHINESE_BIG5_2 (CHARSET_ID_OFFSET - 8)
+
+#define LEADING_BYTE_ETHIOPIC_UCS (CHARSET_ID_OFFSET - 9)
+
+#define LEADING_BYTE_DAIKANWA (CHARSET_ID_OFFSET - 10)
+#define LEADING_BYTE_DAIKANWA_EKANJI (CHARSET_ID_OFFSET - 11)
+#define LEADING_BYTE_MOJIKYO (CHARSET_ID_OFFSET - 12)
+
+/* Japanese JIS X0208-1990 2/4 2/{(8),9,10,11} 4/2 (B) */
+#define LEADING_BYTE_JAPANESE_JISX0208_1990 (CHARSET_ID_OFFSET - 13)
+
+/* Konjaku-Mojikyo font (for pseudo-JIS X 0208 encoding) */
+#define LEADING_BYTE_MOJIKYO_PJ_1 (CHARSET_ID_OFFSET - 14)
+#define LEADING_BYTE_MOJIKYO_PJ_2 (CHARSET_ID_OFFSET - 15)
+#define LEADING_BYTE_MOJIKYO_PJ_3 (CHARSET_ID_OFFSET - 16)
+#define LEADING_BYTE_MOJIKYO_PJ_4 (CHARSET_ID_OFFSET - 17)
+#define LEADING_BYTE_MOJIKYO_PJ_5 (CHARSET_ID_OFFSET - 18)
+#define LEADING_BYTE_MOJIKYO_PJ_6 (CHARSET_ID_OFFSET - 19)
+#define LEADING_BYTE_MOJIKYO_PJ_7 (CHARSET_ID_OFFSET - 20)
+#define LEADING_BYTE_MOJIKYO_PJ_8 (CHARSET_ID_OFFSET - 21)
+#define LEADING_BYTE_MOJIKYO_PJ_9 (CHARSET_ID_OFFSET - 22)
+#define LEADING_BYTE_MOJIKYO_PJ_10 (CHARSET_ID_OFFSET - 23)
+#define LEADING_BYTE_MOJIKYO_PJ_11 (CHARSET_ID_OFFSET - 24)
+#define LEADING_BYTE_MOJIKYO_PJ_12 (CHARSET_ID_OFFSET - 25)
+#define LEADING_BYTE_MOJIKYO_PJ_13 (CHARSET_ID_OFFSET - 26)
+#define LEADING_BYTE_MOJIKYO_PJ_14 (CHARSET_ID_OFFSET - 27)
+#define LEADING_BYTE_MOJIKYO_PJ_15 (CHARSET_ID_OFFSET - 28)
+#define LEADING_BYTE_MOJIKYO_PJ_16 (CHARSET_ID_OFFSET - 29)
+#define LEADING_BYTE_MOJIKYO_PJ_17 (CHARSET_ID_OFFSET - 30)
+#define LEADING_BYTE_MOJIKYO_PJ_18 (CHARSET_ID_OFFSET - 31)
+#define LEADING_BYTE_MOJIKYO_PJ_19 (CHARSET_ID_OFFSET - 32)
+#define LEADING_BYTE_MOJIKYO_PJ_20 (CHARSET_ID_OFFSET - 33)
+#define LEADING_BYTE_MOJIKYO_PJ_21 (CHARSET_ID_OFFSET - 34)