-module(couch_btree).

-export([open/2, open/3, query_modify/4, add/2, add_remove/3, foldl/3, foldl/4]).
-export([foldr/3, foldr/4, fold/4, fold/5, full_reduce/1, final_reduce/2]).
-export([fold_reduce/6, fold_reduce/7, lookup/2, get_state/1, set_options/2]).

-record(btree,
    {fd,
    root,
    extract_kv = fun({Key, Value}) -> {Key, Value} end,
    assemble_kv =  fun(Key, Value) -> {Key, Value} end,
    less = fun(A, B) -> A < B end,
    reduce = nil
    }).