+ return decode_builtin_char (charset, code_point);
+ else if (EQ (charset, Vcharset_chinese_big5_1))
+ {
+ unsigned int I
+ = ((code_point >> 8) - 33) * (0xFF - 0xA1)
+ + ((code_point & 0xFF) - 33);
+ unsigned char b1 = I / (0xFF - 0xA1 + 0x7F - 0x40) + 0xA1;
+ unsigned char b2 = I % (0xFF - 0xA1 + 0x7F - 0x40);
+
+ b2 += b2 < 0x3F ? 0x40 : 0x62;
+ return DECODE_CHAR (Vcharset_chinese_big5, (b1 << 8) | b2);
+ }
+ else if (EQ (charset, Vcharset_chinese_big5_2))
+ {
+ unsigned int I
+ = ((code_point >> 8) - 33) * (0xFF - 0xA1)
+ + ((code_point & 0xFF) - 33);
+ unsigned char b1, b2;
+
+ I += (0xFF - 0xA1 + 0x7F - 0x40) * (0xC9 - 0xA1);
+ b1 = I / (0xFF - 0xA1 + 0x7F - 0x40) + 0xA1;
+ b2 = I % (0xFF - 0xA1 + 0x7F - 0x40);
+ b2 += b2 < 0x3F ? 0x40 : 0x62;
+ return DECODE_CHAR (Vcharset_chinese_big5, (b1 << 8) | b2);
+ }
+ else if (EQ (charset, Vcharset_mojikyo_2022_1))
+ {
+ int m =
+ DECODE_MOJIKYO_2022
+ ((unsigned char)(code_point >> 16),
+ (unsigned char)(code_point >> 8),
+ (unsigned char) code_point);
+
+ if (m > 0)
+ return DECODE_CHAR (Vcharset_mojikyo, m);
+ else
+ return ' ';
+ }