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