1use poulpy_hal::layouts::{Backend, Data, DataMut, DataRef, Module, Scratch};
  2
  3use crate::layouts::{
  4    Base2K, Degree, Dnum, Dsize, GGLWEInfos, GGLWEPrepared, GGLWEPreparedFactory, GGLWEPreparedToMut, GGLWEPreparedToRef,
  5    GGLWEToRef, GLWEInfos, LWEInfos, Rank, TorusPrecision,
  6};
  7
  8#[derive(PartialEq, Eq)]
  9pub struct GLWETensorKeyPrepared<D: Data, B: Backend>(pub(crate) GGLWEPrepared<D, B>);
 10
 11impl<D: Data, B: Backend> LWEInfos for GLWETensorKeyPrepared<D, B> {
 12    fn n(&self) -> Degree {
 13        self.0.n()
 14    }
 15
 16    fn base2k(&self) -> Base2K {
 17        self.0.base2k()
 18    }
 19
 20    fn k(&self) -> TorusPrecision {
 21        self.0.k()
 22    }
 23
 24    fn size(&self) -> usize {
 25        self.0.size()
 26    }
 27}
 28
 29impl<D: Data, B: Backend> GLWEInfos for GLWETensorKeyPrepared<D, B> {
 30    fn rank(&self) -> Rank {
 31        self.rank_out()
 32    }
 33}
 34
 35impl<D: Data, B: Backend> GGLWEInfos for GLWETensorKeyPrepared<D, B> {
 36    fn rank_in(&self) -> Rank {
 37        self.rank_out()
 38    }
 39
 40    fn rank_out(&self) -> Rank {
 41        self.0.rank_out()
 42    }
 43
 44    fn dsize(&self) -> Dsize {
 45        self.0.dsize()
 46    }
 47
 48    fn dnum(&self) -> Dnum {
 49        self.0.dnum()
 50    }
 51}
 52
 53pub trait GLWETensorKeyPreparedFactory<B: Backend>
 54where
 55    Self: GGLWEPreparedFactory<B>,
 56{
 57    fn alloc_tensor_key_prepared(
 58        &self,
 59        base2k: Base2K,
 60        k: TorusPrecision,
 61        dnum: Dnum,
 62        dsize: Dsize,
 63        rank: Rank,
 64    ) -> GLWETensorKeyPrepared<Vec<u8>, B> {
 65        let pairs: u32 = (((rank.as_u32() + 1) * rank.as_u32()) >> 1).max(1);
 66        GLWETensorKeyPrepared(self.alloc_gglwe_prepared(base2k, k, Rank(pairs), rank, dnum, dsize))
 67    }
 68
 69    fn alloc_tensor_key_prepared_from_infos<A>(&self, infos: &A) -> GLWETensorKeyPrepared<Vec<u8>, B>
 70    where
 71        A: GGLWEInfos,
 72    {
 73        assert_eq!(
 74            infos.rank_in(),
 75            infos.rank_out(),
 76            "rank_in != rank_out is not supported for TensorKeyPrepared"
 77        );
 78        self.alloc_tensor_key_prepared(
 79            infos.base2k(),
 80            infos.k(),
 81            infos.dnum(),
 82            infos.dsize(),
 83            infos.rank_out(),
 84        )
 85    }
 86
 87    fn bytes_of_tensor_key_prepared(&self, base2k: Base2K, k: TorusPrecision, rank: Rank, dnum: Dnum, dsize: Dsize) -> usize {
 88        let pairs: u32 = (((rank.as_u32() + 1) * rank.as_u32()) >> 1).max(1);
 89        self.bytes_of_gglwe_prepared(base2k, k, Rank(pairs), rank, dnum, dsize)
 90    }
 91
 92    fn bytes_of_tensor_key_prepared_from_infos<A>(&self, infos: &A) -> usize
 93    where
 94        A: GGLWEInfos,
 95    {
 96        self.bytes_of_tensor_key_prepared(
 97            infos.base2k(),
 98            infos.k(),
 99            infos.rank(),
100            infos.dnum(),
101            infos.dsize(),
102        )
103    }
104
105    fn prepare_tensor_key_tmp_bytes<A>(&self, infos: &A) -> usize
106    where
107        A: GGLWEInfos,
108    {
109        self.prepare_gglwe_tmp_bytes(infos)
110    }
111
112    fn prepare_tensor_key<R, O>(&self, res: &mut R, other: &O, scratch: &mut Scratch<B>)
113    where
114        R: GGLWEPreparedToMut<B>,
115        O: GGLWEToRef,
116    {
117        self.prepare_gglwe(res, other, scratch);
118    }
119}
120
121impl<B: Backend> GLWETensorKeyPreparedFactory<B> for Module<B> where Module<B>: GGLWEPreparedFactory<B> {}
122
123impl<B: Backend> GLWETensorKeyPrepared<Vec<u8>, B> {
124    pub fn alloc_from_infos<A, M>(module: &M, infos: &A) -> Self
125    where
126        A: GGLWEInfos,
127        M: GLWETensorKeyPreparedFactory<B>,
128    {
129        module.alloc_tensor_key_prepared_from_infos(infos)
130    }
131
132    pub fn alloc_with<M>(module: &M, base2k: Base2K, k: TorusPrecision, dnum: Dnum, dsize: Dsize, rank: Rank) -> Self
133    where
134        M: GLWETensorKeyPreparedFactory<B>,
135    {
136        module.alloc_tensor_key_prepared(base2k, k, dnum, dsize, rank)
137    }
138
139    pub fn bytes_of_from_infos<A, M>(module: &M, infos: &A) -> usize
140    where
141        A: GGLWEInfos,
142        M: GLWETensorKeyPreparedFactory<B>,
143    {
144        module.bytes_of_tensor_key_prepared_from_infos(infos)
145    }
146
147    pub fn bytes_of<M>(module: &M, base2k: Base2K, k: TorusPrecision, rank: Rank, dnum: Dnum, dsize: Dsize) -> usize
148    where
149        M: GLWETensorKeyPreparedFactory<B>,
150    {
151        module.bytes_of_tensor_key_prepared(base2k, k, rank, dnum, dsize)
152    }
153}
154
155impl<B: Backend> GLWETensorKeyPrepared<Vec<u8>, B> {
156    pub fn prepare_tmp_bytes<A, M>(&self, module: &M, infos: &A) -> usize
157    where
158        A: GGLWEInfos,
159        M: GLWETensorKeyPreparedFactory<B>,
160    {
161        module.prepare_tensor_key_tmp_bytes(infos)
162    }
163}
164
165impl<D: DataMut, B: Backend> GLWETensorKeyPrepared<D, B> {
166    pub fn prepare<O, M>(&mut self, module: &M, other: &O, scratch: &mut Scratch<B>)
167    where
168        O: GGLWEToRef,
169        M: GLWETensorKeyPreparedFactory<B>,
170    {
171        module.prepare_tensor_key(self, other, scratch);
172    }
173}
174
175impl<D: DataMut, B: Backend> GGLWEPreparedToMut<B> for GLWETensorKeyPrepared<D, B>
176where
177    GGLWEPrepared<D, B>: GGLWEPreparedToMut<B>,
178{
179    fn to_mut(&mut self) -> GGLWEPrepared<&mut [u8], B> {
180        self.0.to_mut()
181    }
182}
183
184impl<D: DataRef, B: Backend> GGLWEPreparedToRef<B> for GLWETensorKeyPrepared<D, B>
185where
186    GGLWEPrepared<D, B>: GGLWEPreparedToRef<B>,
187{
188    fn to_ref(&self) -> GGLWEPrepared<&[u8], B> {
189        self.0.to_ref()
190    }
191}