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