poulpy_core/layouts/
gglwe_tsk.rs

1use poulpy_hal::{
2    api::{FillUniform, Reset},
3    layouts::{Data, DataMut, DataRef, MatZnx, ReaderFrom, WriterTo},
4    source::Source,
5};
6
7use crate::layouts::{GGLWESwitchingKey, Infos};
8use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
9
10use std::fmt;
11
12#[derive(PartialEq, Eq, Clone)]
13pub struct GGLWETensorKey<D: Data> {
14    pub(crate) keys: Vec<GGLWESwitchingKey<D>>,
15}
16
17impl<D: DataRef> fmt::Debug for GGLWETensorKey<D> {
18    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
19        write!(f, "{}", self)
20    }
21}
22
23impl<D: DataMut> FillUniform for GGLWETensorKey<D> {
24    fn fill_uniform(&mut self, source: &mut Source) {
25        self.keys
26            .iter_mut()
27            .for_each(|key: &mut GGLWESwitchingKey<D>| key.fill_uniform(source))
28    }
29}
30
31impl<D: DataMut> Reset for GGLWETensorKey<D>
32where
33    MatZnx<D>: Reset,
34{
35    fn reset(&mut self) {
36        self.keys
37            .iter_mut()
38            .for_each(|key: &mut GGLWESwitchingKey<D>| key.reset())
39    }
40}
41
42impl<D: DataRef> fmt::Display for GGLWETensorKey<D> {
43    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
44        writeln!(f, "(GLWETensorKey)",)?;
45        for (i, key) in self.keys.iter().enumerate() {
46            write!(f, "{}: {}", i, key)?;
47        }
48        Ok(())
49    }
50}
51
52impl GGLWETensorKey<Vec<u8>> {
53    pub fn alloc(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> Self {
54        let mut keys: Vec<GGLWESwitchingKey<Vec<u8>>> = Vec::new();
55        let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
56        (0..pairs).for_each(|_| {
57            keys.push(GGLWESwitchingKey::alloc(n, basek, k, rows, digits, 1, rank));
58        });
59        Self { keys }
60    }
61
62    pub fn bytes_of(n: usize, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> usize {
63        let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
64        pairs * GGLWESwitchingKey::<Vec<u8>>::bytes_of(n, basek, k, rows, digits, 1, rank)
65    }
66}
67
68impl<D: Data> Infos for GGLWETensorKey<D> {
69    type Inner = MatZnx<D>;
70
71    fn inner(&self) -> &Self::Inner {
72        self.keys[0].inner()
73    }
74
75    fn basek(&self) -> usize {
76        self.keys[0].basek()
77    }
78
79    fn k(&self) -> usize {
80        self.keys[0].k()
81    }
82}
83
84impl<D: Data> GGLWETensorKey<D> {
85    pub fn rank(&self) -> usize {
86        self.keys[0].rank()
87    }
88
89    pub fn rank_in(&self) -> usize {
90        self.keys[0].rank_in()
91    }
92
93    pub fn rank_out(&self) -> usize {
94        self.keys[0].rank_out()
95    }
96
97    pub fn digits(&self) -> usize {
98        self.keys[0].digits()
99    }
100}
101
102impl<D: DataMut> GGLWETensorKey<D> {
103    // Returns a mutable reference to GLWESwitchingKey_{s}(s[i] * s[j])
104    pub fn at_mut(&mut self, mut i: usize, mut j: usize) -> &mut GGLWESwitchingKey<D> {
105        if i > j {
106            std::mem::swap(&mut i, &mut j);
107        };
108        let rank: usize = self.rank();
109        &mut self.keys[i * rank + j - (i * (i + 1) / 2)]
110    }
111}
112
113impl<D: DataRef> GGLWETensorKey<D> {
114    // Returns a reference to GLWESwitchingKey_{s}(s[i] * s[j])
115    pub fn at(&self, mut i: usize, mut j: usize) -> &GGLWESwitchingKey<D> {
116        if i > j {
117            std::mem::swap(&mut i, &mut j);
118        };
119        let rank: usize = self.rank();
120        &self.keys[i * rank + j - (i * (i + 1) / 2)]
121    }
122}
123
124impl<D: DataMut> ReaderFrom for GGLWETensorKey<D> {
125    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
126        let len: usize = reader.read_u64::<LittleEndian>()? as usize;
127        if self.keys.len() != len {
128            return Err(std::io::Error::new(
129                std::io::ErrorKind::InvalidData,
130                format!("self.keys.len()={} != read len={}", self.keys.len(), len),
131            ));
132        }
133        for key in &mut self.keys {
134            key.read_from(reader)?;
135        }
136        Ok(())
137    }
138}
139
140impl<D: DataRef> WriterTo for GGLWETensorKey<D> {
141    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
142        writer.write_u64::<LittleEndian>(self.keys.len() as u64)?;
143        for key in &self.keys {
144            key.write_to(writer)?;
145        }
146        Ok(())
147    }
148}
poulpy_core/layouts/gglwe_tsk.rs

poulpy_core/layouts/
gglwe_tsk.rs
