1  // Copyright (c) 2019-2025 Alpha-Delta Network Inc.
 2  // This file is part of the deltavm library.
 3  
 4  // Licensed under the Apache License, Version 2.0 (the "License");
 5  // you may not use this file except in compliance with the License.
 6  // You may obtain a copy of the License at:
 7  
 8  // http://www.apache.org/licenses/LICENSE-2.0
 9  
10  // Unless required by applicable law or agreed to in writing, software
11  // distributed under the License is distributed on an "AS IS" BASIS,
12  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  // See the License for the specific language governing permissions and
14  // limitations under the License.
15  
16  use std::fmt::Debug;
17  
18  #[derive(Debug, PartialEq, Eq)]
19  pub enum LegendreSymbol {
20      Zero = 0,
21      QuadraticResidue = 1,
22      QuadraticNonResidue = -1,
23  }
24  
25  impl LegendreSymbol {
26      pub fn is_zero(&self) -> bool {
27          *self == LegendreSymbol::Zero
28      }
29  
30      pub fn is_qnr(&self) -> bool {
31          *self == LegendreSymbol::QuadraticNonResidue
32      }
33  
34      pub fn is_qr(&self) -> bool {
35          *self == LegendreSymbol::QuadraticResidue
36      }
37  }