Function leveldb_sys::leveldb_get

pub unsafe extern "C" fn leveldb_get(
    db: *mut leveldb_t, 
    options: *const leveldb_readoptions_t, 
    key: *const c_char, 
    keylen: size_t, 
    vallen: *mut size_t, 
    errptr: *mut *mut c_char
) -> *mut c_char