func compareState(txn *pb.TxnRequest, r *bufio.Reader) stateFunc {
fmt.Println("entry comparison[key target expected_result compare_value] (end with empty line):")
line, err := r.ReadString('\n')
if err != nil {
ExitWithError(ExitInvalidInput, err)
}
if len(line) == 1 {
return successState
}
// remove trialling \n
line = line[:len(line)-1]
c, err := parseCompare(line)
if err != nil {
ExitWithError(ExitInvalidInput, err)
}
txn.Compare = append(txn.Compare, c)
return compareState
}