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