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, Dnum, Dsize, GGLWE, GGLWEInfos, GGLWEToMut, GGLWEToRef, GLWEInfos, GLWESwitchingKey, GLWESwitchingKeyDegrees,
 10    GLWESwitchingKeyDegreesMut, LWEInfos, Rank, TorusPrecision,
 11};
 12
 13#[derive(PartialEq, Eq, Copy, Clone, Debug)]
 14pub struct LWESwitchingKeyLayout {
 15    pub n: Degree,
 16    pub base2k: Base2K,
 17    pub k: TorusPrecision,
 18    pub dnum: Dnum,
 19}
 20
 21impl LWEInfos for LWESwitchingKeyLayout {
 22    fn n(&self) -> Degree {
 23        self.n
 24    }
 25
 26    fn base2k(&self) -> Base2K {
 27        self.base2k
 28    }
 29
 30    fn k(&self) -> TorusPrecision {
 31        self.k
 32    }
 33}
 34
 35impl GLWEInfos for LWESwitchingKeyLayout {
 36    fn rank(&self) -> Rank {
 37        self.rank_out()
 38    }
 39}
 40
 41impl GGLWEInfos for LWESwitchingKeyLayout {
 42    fn rank_in(&self) -> Rank {
 43        Rank(1)
 44    }
 45
 46    fn dsize(&self) -> Dsize {
 47        Dsize(1)
 48    }
 49
 50    fn rank_out(&self) -> Rank {
 51        Rank(1)
 52    }
 53
 54    fn dnum(&self) -> Dnum {
 55        self.dnum
 56    }
 57}
 58
 59#[derive(PartialEq, Eq, Clone)]
 60pub struct LWESwitchingKey<D: Data>(pub(crate) GLWESwitchingKey<D>);
 61
 62impl<D: Data> LWEInfos for LWESwitchingKey<D> {
 63    fn base2k(&self) -> Base2K {
 64        self.0.base2k()
 65    }
 66
 67    fn k(&self) -> TorusPrecision {
 68        self.0.k()
 69    }
 70
 71    fn n(&self) -> Degree {
 72        self.0.n()
 73    }
 74
 75    fn size(&self) -> usize {
 76        self.0.size()
 77    }
 78}
 79
 80impl<D: Data> GLWEInfos for LWESwitchingKey<D> {
 81    fn rank(&self) -> Rank {
 82        self.rank_out()
 83    }
 84}
 85
 86impl<D: Data> GGLWEInfos for LWESwitchingKey<D> {
 87    fn dsize(&self) -> Dsize {
 88        self.0.dsize()
 89    }
 90
 91    fn rank_in(&self) -> Rank {
 92        self.0.rank_in()
 93    }
 94
 95    fn rank_out(&self) -> Rank {
 96        self.0.rank_out()
 97    }
 98
 99    fn dnum(&self) -> Dnum {
100        self.0.dnum()
101    }
102}
103
104impl LWESwitchingKey<Vec<u8>> {
105    pub fn alloc_from_infos<A>(infos: &A) -> Self
106    where
107        A: GGLWEInfos,
108    {
109        assert_eq!(infos.dsize().0, 1, "dsize > 1 is not supported for LWESwitchingKey");
110        assert_eq!(infos.rank_in().0, 1, "rank_in > 1 is not supported for LWESwitchingKey");
111        assert_eq!(infos.rank_out().0, 1, "rank_out > 1 is not supported for LWESwitchingKey");
112        Self::alloc(infos.n(), infos.base2k(), infos.k(), infos.dnum())
113    }
114
115    pub fn alloc(n: Degree, base2k: Base2K, k: TorusPrecision, dnum: Dnum) -> Self {
116        LWESwitchingKey(GLWESwitchingKey::alloc(n, base2k, k, Rank(1), Rank(1), dnum, Dsize(1)))
117    }
118
119    pub fn bytes_of_from_infos<A>(infos: &A) -> usize
120    where
121        A: GGLWEInfos,
122    {
123        assert_eq!(infos.dsize().0, 1, "dsize > 1 is not supported for LWESwitchingKey");
124        assert_eq!(infos.rank_in().0, 1, "rank_in > 1 is not supported for LWESwitchingKey");
125        assert_eq!(infos.rank_out().0, 1, "rank_out > 1 is not supported for LWESwitchingKey");
126        Self::bytes_of(infos.n(), infos.base2k(), infos.k(), infos.dnum())
127    }
128
129    pub fn bytes_of(n: Degree, base2k: Base2K, k: TorusPrecision, dnum: Dnum) -> usize {
130        GLWESwitchingKey::bytes_of(n, base2k, k, Rank(1), Rank(1), dnum, Dsize(1))
131    }
132}
133
134impl<D: DataRef> fmt::Debug for LWESwitchingKey<D> {
135    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
136        write!(f, "{self}")
137    }
138}
139
140impl<D: DataMut> FillUniform for LWESwitchingKey<D> {
141    fn fill_uniform(&mut self, log_bound: usize, source: &mut Source) {
142        self.0.fill_uniform(log_bound, source);
143    }
144}
145
146impl<D: DataRef> fmt::Display for LWESwitchingKey<D> {
147    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
148        write!(f, "(LWESwitchingKey) {}", self.0)
149    }
150}
151
152impl<D: DataMut> ReaderFrom for LWESwitchingKey<D> {
153    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
154        self.0.read_from(reader)
155    }
156}
157
158impl<D: DataRef> WriterTo for LWESwitchingKey<D> {
159    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
160        self.0.write_to(writer)
161    }
162}
163
164impl<D: DataRef> GGLWEToRef for LWESwitchingKey<D> {
165    fn to_ref(&self) -> GGLWE<&[u8]> {
166        self.0.to_ref()
167    }
168}
169
170impl<D: DataMut> GGLWEToMut for LWESwitchingKey<D> {
171    fn to_mut(&mut self) -> GGLWE<&mut [u8]> {
172        self.0.to_mut()
173    }
174}
175
176impl<D: DataMut> GLWESwitchingKeyDegreesMut for LWESwitchingKey<D> {
177    fn input_degree(&mut self) -> &mut Degree {
178        &mut self.0.input_degree
179    }
180
181    fn output_degree(&mut self) -> &mut Degree {
182        &mut self.0.output_degree
183    }
184}
185
186impl<D: DataRef> GLWESwitchingKeyDegrees for LWESwitchingKey<D> {
187    fn input_degree(&self) -> &Degree {
188        &self.0.input_degree
189    }
190
191    fn output_degree(&self) -> &Degree {
192        &self.0.output_degree
193    }
194}