1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140

// Copyright (C) 2019-2023 Aleo Systems Inc.
// This file is part of the snarkVM library.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use super::*;

impl<N: Network> Eq for Plaintext<N> {}

impl<N: Network> PartialEq for Plaintext<N> {
    /// Returns `true` if `self` and `other` are equal.
    fn eq(&self, other: &Self) -> bool {
        *self.is_equal(other)
    }
}

impl<N: Network> Equal<Self> for Plaintext<N> {
    type Output = Boolean<N>;

    /// Returns `true` if `self` and `other` are equal.
    fn is_equal(&self, other: &Self) -> Self::Output {
        match (self, other) {
            (Self::Literal(a, _), Self::Literal(b, _)) => a.is_equal(b),
            (Self::Struct(a, _), Self::Struct(b, _)) => match a.len() == b.len() {
                true => {
                    // Recursively check each member for equality.
                    let mut equal = Boolean::new(true);
                    for ((name_a, plaintext_a), (name_b, plaintext_b)) in a.iter().zip_eq(b.iter()) {
                        equal = equal & name_a.is_equal(name_b) & plaintext_a.is_equal(plaintext_b);
                    }
                    equal
                }
                false => Boolean::new(false),
            },
            (Self::Literal(..), _) | (Self::Struct(..), _) => Boolean::new(false),
        }
    }

    /// Returns `true` if `self` and `other` are *not* equal.
    fn is_not_equal(&self, other: &Self) -> Self::Output {
        match (self, other) {
            (Self::Literal(a, _), Self::Literal(b, _)) => a.is_not_equal(b),
            (Self::Struct(a, _), Self::Struct(b, _)) => match a.len() == b.len() {
                true => {
                    // Recursively check each member for equality.
                    let mut not_equal = Boolean::new(false);
                    for ((name_a, plaintext_a), (name_b, plaintext_b)) in a.iter().zip_eq(b.iter()) {
                        not_equal = not_equal | name_a.is_not_equal(name_b) | plaintext_a.is_not_equal(plaintext_b);
                    }
                    not_equal
                }
                false => Boolean::new(true),
            },
            (Self::Literal(..), _) | (Self::Struct(..), _) => Boolean::new(true),
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use snarkvm_console_network::Testnet3;

    type CurrentNetwork = Testnet3;

    fn sample_plaintext() -> Plaintext<CurrentNetwork> {
        Plaintext::<CurrentNetwork>::from_str(
            r"{
    a: true,
    b: 123456789field,
    c: 0group,
    d: {
        e: true,
        f: 123456789field,
        g: 0group
    }
}",
        )
        .unwrap()
    }

    fn sample_mismatched_plaintext() -> Plaintext<CurrentNetwork> {
        Plaintext::<CurrentNetwork>::from_str(
            r"{
    a: false,
    b: 123456789field,
    c: 0group,
    d: {
        e: true,
        f: 123456789field,
        g: 0group
    }
}",
        )
        .unwrap()
    }

    fn check_is_equal() {
        // Sample the plaintext.
        let plaintext = sample_plaintext();
        let mismatched_plaintext = sample_mismatched_plaintext();

        let candidate = plaintext.is_equal(&plaintext);
        assert!(*candidate);

        let candidate = plaintext.is_equal(&mismatched_plaintext);
        assert!(!*candidate);
    }

    fn check_is_not_equal() {
        // Sample the plaintext.
        let plaintext = sample_plaintext();
        let mismatched_plaintext = sample_mismatched_plaintext();

        let candidate = plaintext.is_not_equal(&mismatched_plaintext);
        assert!(*candidate);

        let candidate = plaintext.is_not_equal(&plaintext);
        assert!(!*candidate);
    }

    #[test]
    fn test_is_equal() {
        check_is_equal()
    }

    #[test]
    fn test_is_not_equal() {
        check_is_not_equal()
    }
}