1use std::fmt;
  2
  3use poulpy_hal::{
  4    layouts::{Data, DataMut, DataRef, FillUniform, ReaderFrom, WriterTo},
  5    source::Source,
  6};
  7
  8use crate::layouts::{
  9    Base2K, Degree, Digits, GGLWELayoutInfos, GGLWESwitchingKey, GLWEInfos, LWEInfos, Rank, Rows, TorusPrecision,
 10};
 11
 12#[derive(PartialEq, Eq, Copy, Clone, Debug)]
 13pub struct LWESwitchingKeyLayout {
 14    pub n: Degree,
 15    pub base2k: Base2K,
 16    pub k: TorusPrecision,
 17    pub rows: Rows,
 18}
 19
 20impl LWEInfos for LWESwitchingKeyLayout {
 21    fn n(&self) -> Degree {
 22        self.n
 23    }
 24
 25    fn base2k(&self) -> Base2K {
 26        self.base2k
 27    }
 28
 29    fn k(&self) -> TorusPrecision {
 30        self.k
 31    }
 32}
 33
 34impl GLWEInfos for LWESwitchingKeyLayout {
 35    fn rank(&self) -> Rank {
 36        self.rank_out()
 37    }
 38}
 39
 40impl GGLWELayoutInfos for LWESwitchingKeyLayout {
 41    fn rank_in(&self) -> Rank {
 42        Rank(1)
 43    }
 44
 45    fn digits(&self) -> Digits {
 46        Digits(1)
 47    }
 48
 49    fn rank_out(&self) -> Rank {
 50        Rank(1)
 51    }
 52
 53    fn rows(&self) -> Rows {
 54        self.rows
 55    }
 56}
 57
 58#[derive(PartialEq, Eq, Clone)]
 59pub struct LWESwitchingKey<D: Data>(pub(crate) GGLWESwitchingKey<D>);
 60
 61impl<D: Data> LWEInfos for LWESwitchingKey<D> {
 62    fn base2k(&self) -> Base2K {
 63        self.0.base2k()
 64    }
 65
 66    fn k(&self) -> TorusPrecision {
 67        self.0.k()
 68    }
 69
 70    fn n(&self) -> Degree {
 71        self.0.n()
 72    }
 73
 74    fn size(&self) -> usize {
 75        self.0.size()
 76    }
 77}
 78
 79impl<D: Data> GLWEInfos for LWESwitchingKey<D> {
 80    fn rank(&self) -> Rank {
 81        self.rank_out()
 82    }
 83}
 84
 85impl<D: Data> GGLWELayoutInfos for LWESwitchingKey<D> {
 86    fn digits(&self) -> Digits {
 87        self.0.digits()
 88    }
 89
 90    fn rank_in(&self) -> Rank {
 91        self.0.rank_in()
 92    }
 93
 94    fn rank_out(&self) -> Rank {
 95        self.0.rank_out()
 96    }
 97
 98    fn rows(&self) -> Rows {
 99        self.0.rows()
100    }
101}
102
103impl LWESwitchingKey<Vec<u8>> {
104    pub fn alloc<A>(infos: &A) -> Self
105    where
106        A: GGLWELayoutInfos,
107    {
108        debug_assert_eq!(
109            infos.digits().0,
110            1,
111            "digits > 1 is not supported for LWESwitchingKey"
112        );
113        debug_assert_eq!(
114            infos.rank_in().0,
115            1,
116            "rank_in > 1 is not supported for LWESwitchingKey"
117        );
118        debug_assert_eq!(
119            infos.rank_out().0,
120            1,
121            "rank_out > 1 is not supported for LWESwitchingKey"
122        );
123        Self(GGLWESwitchingKey::alloc(infos))
124    }
125
126    pub fn alloc_with(n: Degree, base2k: Base2K, k: TorusPrecision, rows: Rows) -> Self {
127        Self(GGLWESwitchingKey::alloc_with(
128            n,
129            base2k,
130            k,
131            rows,
132            Digits(1),
133            Rank(1),
134            Rank(1),
135        ))
136    }
137
138    pub fn alloc_bytes<A>(infos: &A) -> usize
139    where
140        A: GGLWELayoutInfos,
141    {
142        debug_assert_eq!(
143            infos.digits().0,
144            1,
145            "digits > 1 is not supported for LWESwitchingKey"
146        );
147        debug_assert_eq!(
148            infos.rank_in().0,
149            1,
150            "rank_in > 1 is not supported for LWESwitchingKey"
151        );
152        debug_assert_eq!(
153            infos.rank_out().0,
154            1,
155            "rank_out > 1 is not supported for LWESwitchingKey"
156        );
157        GGLWESwitchingKey::alloc_bytes(infos)
158    }
159
160    pub fn alloc_bytes_with(n: Degree, base2k: Base2K, k: TorusPrecision, rows: Rows) -> usize {
161        GGLWESwitchingKey::alloc_bytes_with(n, base2k, k, rows, Digits(1), Rank(1), Rank(1))
162    }
163}
164
165impl<D: DataRef> fmt::Debug for LWESwitchingKey<D> {
166    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
167        write!(f, "{self}")
168    }
169}
170
171impl<D: DataMut> FillUniform for LWESwitchingKey<D> {
172    fn fill_uniform(&mut self, log_bound: usize, source: &mut Source) {
173        self.0.fill_uniform(log_bound, source);
174    }
175}
176
177impl<D: DataRef> fmt::Display for LWESwitchingKey<D> {
178    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
179        write!(f, "(LWESwitchingKey) {}", self.0)
180    }
181}
182
183impl<D: DataMut> ReaderFrom for LWESwitchingKey<D> {
184    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
185        self.0.read_from(reader)
186    }
187}
188
189impl<D: DataRef> WriterTo for LWESwitchingKey<D> {
190    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
191        self.0.write_to(writer)
192    }
193}