1use poulpy_hal::layouts::{Backend, Data, DataMut, DataRef, Module, Scratch};
  2
  3use crate::layouts::{
  4    Base2K, Degree, Dnum, Dsize, GGLWEInfos, GLWEInfos, GLWESwitchingKeySetMetaData, GLWESwitchingKeyToRef,
  5    GLWESwtichingKeyGetMetaData, LWEInfos, Rank, TorusPrecision,
  6    prepared::{GGLWEPrepare, GGLWEPrepared, GGLWEPreparedAlloc, GGLWEPreparedToMut, GGLWEPreparedToRef},
  7};
  8
  9#[derive(PartialEq, Eq)]
 10pub struct GLWESwitchingKeyPrepared<D: Data, B: Backend> {
 11    pub(crate) key: GGLWEPrepared<D, B>,
 12    pub(crate) sk_in_n: usize,  // Degree of sk_in
 13    pub(crate) sk_out_n: usize, // Degree of sk_out
 14}
 15
 16impl<D: DataMut, B: Backend> GLWESwitchingKeySetMetaData for GLWESwitchingKeyPrepared<D, B> {
 17    fn set_sk_in_n(&mut self, sk_in_n: usize) {
 18        self.sk_in_n = sk_in_n
 19    }
 20
 21    fn set_sk_out_n(&mut self, sk_out_n: usize) {
 22        self.sk_out_n = sk_out_n
 23    }
 24}
 25
 26impl<D: DataRef, B: Backend> GLWESwtichingKeyGetMetaData for GLWESwitchingKeyPrepared<D, B> {
 27    fn sk_in_n(&self) -> usize {
 28        self.sk_in_n
 29    }
 30
 31    fn sk_out_n(&self) -> usize {
 32        self.sk_out_n
 33    }
 34}
 35
 36impl<D: Data, B: Backend> LWEInfos for GLWESwitchingKeyPrepared<D, B> {
 37    fn n(&self) -> Degree {
 38        self.key.n()
 39    }
 40
 41    fn base2k(&self) -> Base2K {
 42        self.key.base2k()
 43    }
 44
 45    fn k(&self) -> TorusPrecision {
 46        self.key.k()
 47    }
 48
 49    fn size(&self) -> usize {
 50        self.key.size()
 51    }
 52}
 53
 54impl<D: Data, B: Backend> GLWEInfos for GLWESwitchingKeyPrepared<D, B> {
 55    fn rank(&self) -> Rank {
 56        self.rank_out()
 57    }
 58}
 59
 60impl<D: Data, B: Backend> GGLWEInfos for GLWESwitchingKeyPrepared<D, B> {
 61    fn rank_in(&self) -> Rank {
 62        self.key.rank_in()
 63    }
 64
 65    fn rank_out(&self) -> Rank {
 66        self.key.rank_out()
 67    }
 68
 69    fn dsize(&self) -> Dsize {
 70        self.key.dsize()
 71    }
 72
 73    fn dnum(&self) -> Dnum {
 74        self.key.dnum()
 75    }
 76}
 77
 78pub trait GLWESwitchingKeyPreparedAlloc<B: Backend>
 79where
 80    Self: GGLWEPreparedAlloc<B>,
 81{
 82    fn alloc_glwe_switching_key_prepared(
 83        &self,
 84        base2k: Base2K,
 85        k: TorusPrecision,
 86        rank_in: Rank,
 87        rank_out: Rank,
 88        dnum: Dnum,
 89        dsize: Dsize,
 90    ) -> GLWESwitchingKeyPrepared<Vec<u8>, B> {
 91        GLWESwitchingKeyPrepared::<Vec<u8>, B> {
 92            key: self.alloc_gglwe_prepared(base2k, k, rank_in, rank_out, dnum, dsize),
 93            sk_in_n: 0,
 94            sk_out_n: 0,
 95        }
 96    }
 97
 98    fn glwe_switching_key_prepared_alloc_from_infos<A>(&self, infos: &A) -> GLWESwitchingKeyPrepared<Vec<u8>, B>
 99    where
100        A: GGLWEInfos,
101    {
102        self.alloc_glwe_switching_key_prepared(
103            infos.base2k(),
104            infos.k(),
105            infos.rank_in(),
106            infos.rank_out(),
107            infos.dnum(),
108            infos.dsize(),
109        )
110    }
111
112    fn bytes_of_glwe_switching_key_prepared(
113        &self,
114        base2k: Base2K,
115        k: TorusPrecision,
116        rank_in: Rank,
117        rank_out: Rank,
118        dnum: Dnum,
119        dsize: Dsize,
120    ) -> usize {
121        self.bytes_of_gglwe_prepared(base2k, k, rank_in, rank_out, dnum, dsize)
122    }
123
124    fn glwe_switching_key_prepared_bytes_of_from_infos<A>(&self, infos: &A) -> usize
125    where
126        A: GGLWEInfos,
127    {
128        self.bytes_of_glwe_switching_key_prepared(
129            infos.base2k(),
130            infos.k(),
131            infos.rank_in(),
132            infos.rank_out(),
133            infos.dnum(),
134            infos.dsize(),
135        )
136    }
137}
138
139impl<B: Backend> GLWESwitchingKeyPreparedAlloc<B> for Module<B> where Module<B>: GGLWEPreparedAlloc<B> {}
140
141impl<B: Backend> GLWESwitchingKeyPrepared<Vec<u8>, B>
142where
143    Module<B>: GLWESwitchingKeyPreparedAlloc<B>,
144{
145    pub fn alloc_from_infos<A>(module: &Module<B>, infos: &A) -> Self
146    where
147        A: GGLWEInfos,
148    {
149        module.glwe_switching_key_prepared_alloc_from_infos(infos)
150    }
151
152    pub fn alloc(
153        module: &Module<B>,
154        base2k: Base2K,
155        k: TorusPrecision,
156        rank_in: Rank,
157        rank_out: Rank,
158        dnum: Dnum,
159        dsize: Dsize,
160    ) -> Self {
161        module.alloc_glwe_switching_key_prepared(base2k, k, rank_in, rank_out, dnum, dsize)
162    }
163
164    pub fn bytes_of_from_infos<A>(module: &Module<B>, infos: &A) -> usize
165    where
166        A: GGLWEInfos,
167    {
168        module.glwe_switching_key_prepared_bytes_of_from_infos(infos)
169    }
170
171    pub fn bytes_of(
172        module: &Module<B>,
173        base2k: Base2K,
174        k: TorusPrecision,
175        rank_in: Rank,
176        rank_out: Rank,
177        dnum: Dnum,
178        dsize: Dsize,
179    ) -> usize {
180        module.bytes_of_glwe_switching_key_prepared(base2k, k, rank_in, rank_out, dnum, dsize)
181    }
182}
183
184pub trait GLWESwitchingKeyPrepare<B: Backend>
185where
186    Self: GGLWEPrepare<B>,
187{
188    fn prepare_glwe_switching_key_tmp_bytes<A>(&self, infos: &A) -> usize
189    where
190        A: GGLWEInfos,
191    {
192        self.prepare_gglwe_tmp_bytes(infos)
193    }
194
195    fn prepare_glwe_switching<R, O>(&self, res: &mut R, other: &O, scratch: &mut Scratch<B>)
196    where
197        R: GLWESwitchingKeyPreparedToMut<B> + GLWESwitchingKeySetMetaData,
198        O: GLWESwitchingKeyToRef + GLWESwtichingKeyGetMetaData,
199    {
200        self.prepare_gglwe(&mut res.to_mut().key, &other.to_ref().key, scratch);
201        res.set_sk_in_n(other.sk_in_n());
202        res.set_sk_out_n(other.sk_out_n());
203    }
204}
205
206impl<B: Backend> GLWESwitchingKeyPrepare<B> for Module<B> where Self: GGLWEPrepare<B> {}
207
208impl<D: DataMut, B: Backend> GLWESwitchingKeyPrepared<D, B> {
209    pub fn prepare<O>(&mut self, module: &Module<B>, other: &O, scratch: &mut Scratch<B>)
210    where
211        O: GLWESwitchingKeyToRef + GLWESwtichingKeyGetMetaData,
212        Module<B>: GLWESwitchingKeyPrepare<B>,
213    {
214        module.prepare_glwe_switching(self, other, scratch);
215    }
216}
217
218impl<B: Backend> GLWESwitchingKeyPrepared<Vec<u8>, B>
219where
220    Module<B>: GLWESwitchingKeyPrepare<B>,
221{
222    pub fn prepare_tmp_bytes(&self, module: &Module<B>) -> usize {
223        module.prepare_gglwe_tmp_bytes(self)
224    }
225}
226
227pub trait GLWESwitchingKeyPreparedToMut<B: Backend> {
228    fn to_mut(&mut self) -> GLWESwitchingKeyPrepared<&mut [u8], B>;
229}
230
231impl<D: DataMut, B: Backend> GLWESwitchingKeyPreparedToMut<B> for GLWESwitchingKeyPrepared<D, B> {
232    fn to_mut(&mut self) -> GLWESwitchingKeyPrepared<&mut [u8], B> {
233        GLWESwitchingKeyPrepared {
234            sk_in_n: self.sk_in_n,
235            sk_out_n: self.sk_out_n,
236            key: self.key.to_mut(),
237        }
238    }
239}
240
241pub trait GLWESwitchingKeyPreparedToRef<B: Backend> {
242    fn to_ref(&self) -> GLWESwitchingKeyPrepared<&[u8], B>;
243}
244
245impl<D: DataRef, B: Backend> GLWESwitchingKeyPreparedToRef<B> for GLWESwitchingKeyPrepared<D, B> {
246    fn to_ref(&self) -> GLWESwitchingKeyPrepared<&[u8], B> {
247        GLWESwitchingKeyPrepared {
248            sk_in_n: self.sk_in_n,
249            sk_out_n: self.sk_out_n,
250            key: self.key.to_ref(),
251        }
252    }
253}