poulpy_core/layouts/
lwe_plaintext.rs

1use std::fmt;
2
3use poulpy_hal::layouts::{Data, DataMut, DataRef, Zn, ZnToMut, ZnToRef, ZnxInfos};
4
5use crate::layouts::{Base2K, Degree, LWEInfos, TorusPrecision};
6
7#[derive(PartialEq, Eq, Copy, Clone, Debug)]
8pub struct LWEPlaintextLayout {
9    k: TorusPrecision,
10    base2k: Base2K,
11}
12
13impl LWEInfos for LWEPlaintextLayout {
14    fn base2k(&self) -> Base2K {
15        self.base2k
16    }
17
18    fn k(&self) -> TorusPrecision {
19        self.k
20    }
21
22    fn n(&self) -> Degree {
23        Degree(0)
24    }
25
26    fn size(&self) -> usize {
27        self.k.0.div_ceil(self.base2k.0) as usize
28    }
29}
30
31pub struct LWEPlaintext<D: Data> {
32    pub(crate) data: Zn<D>,
33    pub(crate) k: TorusPrecision,
34    pub(crate) base2k: Base2K,
35}
36
37impl<D: Data> LWEInfos for LWEPlaintext<D> {
38    fn base2k(&self) -> Base2K {
39        self.base2k
40    }
41
42    fn k(&self) -> TorusPrecision {
43        self.k
44    }
45
46    fn n(&self) -> Degree {
47        Degree(self.data.n() as u32 - 1)
48    }
49
50    fn size(&self) -> usize {
51        self.data.size()
52    }
53}
54
55impl LWEPlaintext<Vec<u8>> {
56    pub fn alloc_from_infos<A>(infos: &A) -> Self
57    where
58        A: LWEInfos,
59    {
60        Self::alloc(infos.base2k(), infos.k())
61    }
62
63    pub fn alloc(base2k: Base2K, k: TorusPrecision) -> Self {
64        LWEPlaintext {
65            data: Zn::alloc(1, 1, k.0.div_ceil(base2k.0) as usize),
66            k,
67            base2k,
68        }
69    }
70}
71
72impl<D: DataRef> fmt::Display for LWEPlaintext<D> {
73    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
74        write!(
75            f,
76            "LWEPlaintext: base2k={} k={}: {}",
77            self.base2k().0,
78            self.k().0,
79            self.data
80        )
81    }
82}
83
84pub trait LWEPlaintextToRef {
85    #[allow(dead_code)]
86    fn to_ref(&self) -> LWEPlaintext<&[u8]>;
87}
88
89impl<D: DataRef> LWEPlaintextToRef for LWEPlaintext<D> {
90    fn to_ref(&self) -> LWEPlaintext<&[u8]> {
91        LWEPlaintext {
92            data: self.data.to_ref(),
93            base2k: self.base2k,
94            k: self.k,
95        }
96    }
97}
98
99pub trait LWEPlaintextToMut {
100    #[allow(dead_code)]
101    fn to_mut(&mut self) -> LWEPlaintext<&mut [u8]>;
102}
103
104impl<D: DataMut> LWEPlaintextToMut for LWEPlaintext<D> {
105    fn to_mut(&mut self) -> LWEPlaintext<&mut [u8]> {
106        LWEPlaintext {
107            data: self.data.to_mut(),
108            base2k: self.base2k,
109            k: self.k,
110        }
111    }
112}
113
114impl<D: DataMut> LWEPlaintext<D> {
115    pub fn data_mut(&mut self) -> &mut Zn<D> {
116        &mut self.data
117    }
118}
poulpy_core/layouts/lwe_plaintext.rs

poulpy_core/layouts/
lwe_plaintext.rs
