This is what the author changed: < #define __ac_isempty(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&2) < #define __ac_isdel(flag, i) ((flag[i>>4]>>((i&0xfU)<<1

This is what the author changed: < #define __ac_isempty(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&2) < #define __ac_isdel(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&1) < #define __ac_iseither(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&3) < #define __ac_set_isdel_false(flag, i) (flag[i>>4]&=~(1ul<<((i&0xfU)<<1))) < #define __ac_set_isempty_false(flag, i) (flag[i>>4]&=~(2ul<<((i&0xfU)<<1))) < #define __ac_set_isboth_false(flag, i) (flag[i>>4]&=~(3ul<<((i&0xfU)<<1))) < #define __ac_set_isdel_true(flag, i) (flag[i>>4]|=1ul<<((i&0xfU)<<1)) --- > #define __ac_isempty(flag, i) (flag[i]&2) > #define __ac_isdel(flag, i) (flag[i]&1) > #define __ac_iseither(flag, i) (flag[i]&3) > #define __ac_set_isdel_false(flag, i) (flag[i]&=~1) > #define __ac_set_isempty_false(flag, i) (flag[i]&=~2) > #define __ac_set_isboth_false(flag, i) (flag[i]=0) > #define __ac_set_isdel_true(flag, i) (flag[i]|=1)