-# define IS_COMMENT(c,a) (KEYTYPES(c)[os_toascii[a]&0xff]&CONF_COMMENT)
-# define IS_FCOMMENT(c,a) (KEYTYPES(c)[os_toascii[a]&0xff]&CONF_FCOMMENT)
-# define IS_EOF(c,a) (KEYTYPES(c)[os_toascii[a]&0xff]&CONF_EOF)
-# define IS_ESC(c,a) (KEYTYPES(c)[os_toascii[a]&0xff]&CONF_ESC)
-# define IS_NUMBER(c,a) (KEYTYPES(c)[os_toascii[a]&0xff]&CONF_NUMBER)
-# define IS_WS(c,a) (KEYTYPES(c)[os_toascii[a]&0xff]&CONF_WS)
-# define IS_ALPHA_NUMERIC(c,a) (KEYTYPES(c)[os_toascii[a]&0xff]&CONF_ALPHA_NUMERIC)
+# define IS_COMMENT(c,a) (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_COMMENT)
+# define IS_FCOMMENT(c,a) (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_FCOMMENT)
+# define IS_EOF(c,a) (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_EOF)
+# define IS_ESC(c,a) (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_ESC)
+# define IS_NUMBER(c,a) (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_NUMBER)
+# define IS_WS(c,a) (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_WS)
+# define IS_ALPHA_NUMERIC(c,a) (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_ALPHA_NUMERIC)