1use poulpy_hal::layouts::{Backend, Data, DataMut, DataRef, Module, Scratch};
  2
  3use crate::layouts::{
  4    Base2K, Degree, Dnum, Dsize, GGLWEInfos, GGLWEPrepare, GGLWEPrepared, GGLWEPreparedAlloc, GGLWEPreparedToMut,
  5    GGLWEPreparedToRef, GGLWEToRef, GLWEInfos, LWEInfos, Rank, TorusPrecision,
  6};
  7
  8#[derive(PartialEq, Eq)]
  9pub struct AutomorphismKeyPrepared<D: Data, B: Backend> {
 10    pub(crate) key: GGLWEPrepared<D, B>,
 11    pub(crate) p: i64,
 12}
 13
 14impl<D: Data, B: Backend> LWEInfos for AutomorphismKeyPrepared<D, B> {
 15    fn n(&self) -> Degree {
 16        self.key.n()
 17    }
 18
 19    fn base2k(&self) -> Base2K {
 20        self.key.base2k()
 21    }
 22
 23    fn k(&self) -> TorusPrecision {
 24        self.key.k()
 25    }
 26
 27    fn size(&self) -> usize {
 28        self.key.size()
 29    }
 30}
 31
 32pub trait GetAutomorphismGaloisElement {
 33    fn p(&self) -> i64;
 34}
 35
 36impl<D: Data, B: Backend> GetAutomorphismGaloisElement for AutomorphismKeyPrepared<D, B> {
 37    fn p(&self) -> i64 {
 38        self.p
 39    }
 40}
 41
 42pub trait SetAutomorphismGaloisElement {
 43    fn set_p(&mut self, p: i64);
 44}
 45
 46impl<D: Data, B: Backend> SetAutomorphismGaloisElement for AutomorphismKeyPrepared<D, B> {
 47    fn set_p(&mut self, p: i64) {
 48        self.p = p
 49    }
 50}
 51
 52impl<D: Data, B: Backend> GLWEInfos for AutomorphismKeyPrepared<D, B> {
 53    fn rank(&self) -> Rank {
 54        self.rank_out()
 55    }
 56}
 57
 58impl<D: Data, B: Backend> GGLWEInfos for AutomorphismKeyPrepared<D, B> {
 59    fn rank_in(&self) -> Rank {
 60        self.key.rank_in()
 61    }
 62
 63    fn rank_out(&self) -> Rank {
 64        self.key.rank_out()
 65    }
 66
 67    fn dsize(&self) -> Dsize {
 68        self.key.dsize()
 69    }
 70
 71    fn dnum(&self) -> Dnum {
 72        self.key.dnum()
 73    }
 74}
 75
 76pub trait AutomorphismKeyPreparedAlloc<B: Backend>
 77where
 78    Self: GGLWEPreparedAlloc<B>,
 79{
 80    fn alloc_automorphism_key_prepared(
 81        &self,
 82        base2k: Base2K,
 83        k: TorusPrecision,
 84        rank: Rank,
 85        dnum: Dnum,
 86        dsize: Dsize,
 87    ) -> AutomorphismKeyPrepared<Vec<u8>, B> {
 88        AutomorphismKeyPrepared::<Vec<u8>, B> {
 89            key: self.alloc_gglwe_prepared(base2k, k, rank, rank, dnum, dsize),
 90            p: 0,
 91        }
 92    }
 93
 94    fn alloc_automorphism_key_prepared_from_infos<A>(&self, infos: &A) -> AutomorphismKeyPrepared<Vec<u8>, B>
 95    where
 96        A: GGLWEInfos,
 97    {
 98        assert_eq!(
 99            infos.rank_in(),
100            infos.rank_out(),
101            "rank_in != rank_out is not supported for AutomorphismKeyPrepared"
102        );
103        self.alloc_automorphism_key_prepared(
104            infos.base2k(),
105            infos.k(),
106            infos.rank(),
107            infos.dnum(),
108            infos.dsize(),
109        )
110    }
111
112    fn bytes_of_automorphism_key_prepared(
113        &self,
114        base2k: Base2K,
115        k: TorusPrecision,
116        rank: Rank,
117        dnum: Dnum,
118        dsize: Dsize,
119    ) -> usize {
120        self.bytes_of_gglwe_prepared(base2k, k, rank, rank, dnum, dsize)
121    }
122
123    fn bytes_of_automorphism_key_prepared_from_infos<A>(&self, infos: &A) -> usize
124    where
125        A: GGLWEInfos,
126    {
127        assert_eq!(
128            infos.rank_in(),
129            infos.rank_out(),
130            "rank_in != rank_out is not supported for AutomorphismKeyPrepared"
131        );
132        self.bytes_of_automorphism_key_prepared(
133            infos.base2k(),
134            infos.k(),
135            infos.rank(),
136            infos.dnum(),
137            infos.dsize(),
138        )
139    }
140}
141
142impl<B: Backend> AutomorphismKeyPreparedAlloc<B> for Module<B> where Module<B>: GGLWEPreparedAlloc<B> {}
143
144impl<B: Backend> AutomorphismKeyPrepared<Vec<u8>, B> {
145    pub fn alloc_from_infos<A, M>(module: &M, infos: &A) -> Self
146    where
147        A: GGLWEInfos,
148        M: AutomorphismKeyPreparedAlloc<B>,
149    {
150        module.alloc_automorphism_key_prepared_from_infos(infos)
151    }
152
153    pub fn alloc<M>(module: &M, base2k: Base2K, k: TorusPrecision, rank: Rank, dnum: Dnum, dsize: Dsize) -> Self
154    where
155        M: AutomorphismKeyPreparedAlloc<B>,
156    {
157        module.alloc_automorphism_key_prepared(base2k, k, rank, dnum, dsize)
158    }
159
160    pub fn bytes_of_from_infos<A, M>(module: &M, infos: &A) -> usize
161    where
162        A: GGLWEInfos,
163        M: AutomorphismKeyPreparedAlloc<B>,
164    {
165        module.bytes_of_automorphism_key_prepared_from_infos(infos)
166    }
167
168    pub fn bytes_of<M>(module: &M, base2k: Base2K, k: TorusPrecision, rank: Rank, dnum: Dnum, dsize: Dsize) -> usize
169    where
170        M: AutomorphismKeyPreparedAlloc<B>,
171    {
172        module.bytes_of_automorphism_key_prepared(base2k, k, rank, dnum, dsize)
173    }
174}
175
176pub trait PrepareAutomorphismKey<B: Backend>
177where
178    Self: GGLWEPrepare<B>,
179{
180    fn prepare_automorphism_key_tmp_bytes<A>(&self, infos: &A) -> usize
181    where
182        A: GGLWEInfos,
183    {
184        self.prepare_gglwe_tmp_bytes(infos)
185    }
186
187    fn prepare_automorphism_key<R, O>(&self, res: &mut R, other: &O, scratch: &mut Scratch<B>)
188    where
189        R: GGLWEPreparedToMut<B> + SetAutomorphismGaloisElement,
190        O: GGLWEToRef + GetAutomorphismGaloisElement,
191    {
192        self.prepare_gglwe(res, other, scratch);
193        res.set_p(other.p());
194    }
195}
196
197impl<B: Backend> PrepareAutomorphismKey<B> for Module<B> where Module<B>: GGLWEPrepare<B> {}
198
199impl<B: Backend> AutomorphismKeyPrepared<Vec<u8>, B> {
200    pub fn prepare_tmp_bytes<M>(&self, module: &M) -> usize
201    where
202        M: PrepareAutomorphismKey<B>,
203    {
204        module.prepare_automorphism_key_tmp_bytes(self)
205    }
206}
207
208impl<D: DataMut, B: Backend> AutomorphismKeyPrepared<D, B> {
209    pub fn prepare<O, M>(&mut self, module: &M, other: &O, scratch: &mut Scratch<B>)
210    where
211        O: GGLWEToRef + GetAutomorphismGaloisElement,
212        M: PrepareAutomorphismKey<B>,
213    {
214        module.prepare_automorphism_key(self, other, scratch);
215    }
216}
217
218impl<D: DataMut, B: Backend> GGLWEPreparedToMut<B> for AutomorphismKeyPrepared<D, B> {
219    fn to_mut(&mut self) -> GGLWEPrepared<&mut [u8], B> {
220        self.key.to_mut()
221    }
222}
223
224impl<D: DataRef, BE: Backend> GGLWEPreparedToRef<BE> for AutomorphismKeyPrepared<D, BE> {
225    fn to_ref(&self) -> GGLWEPrepared<&[u8], BE> {
226        self.key.to_ref()
227    }
228}