1use poulpy_hal::{
  2    layouts::{Data, DataMut, DataRef, FillUniform, MatZnx, MatZnxToMut, MatZnxToRef, ReaderFrom, WriterTo, ZnxInfos},
  3    source::Source,
  4};
  5
  6use crate::layouts::{Base2K, Degree, Dnum, Dsize, GLWE, GLWEInfos, LWEInfos, Rank, TorusPrecision};
  7use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
  8
  9use std::fmt;
 10
 11pub trait GGLWEInfos
 12where
 13    Self: GLWEInfos,
 14{
 15    fn dnum(&self) -> Dnum;
 16    fn dsize(&self) -> Dsize;
 17    fn rank_in(&self) -> Rank;
 18    fn rank_out(&self) -> Rank;
 19    fn gglwe_layout(&self) -> GGLWELayout {
 20        GGLWELayout {
 21            n: self.n(),
 22            base2k: self.base2k(),
 23            k: self.k(),
 24            rank_in: self.rank_in(),
 25            rank_out: self.rank_out(),
 26            dsize: self.dsize(),
 27            dnum: self.dnum(),
 28        }
 29    }
 30}
 31
 32pub trait SetGGLWEInfos {
 33    fn set_dsize(&mut self, dsize: usize);
 34}
 35
 36#[derive(PartialEq, Eq, Copy, Clone, Debug)]
 37pub struct GGLWELayout {
 38    pub n: Degree,
 39    pub base2k: Base2K,
 40    pub k: TorusPrecision,
 41    pub rank_in: Rank,
 42    pub rank_out: Rank,
 43    pub dnum: Dnum,
 44    pub dsize: Dsize,
 45}
 46
 47impl LWEInfos for GGLWELayout {
 48    fn base2k(&self) -> Base2K {
 49        self.base2k
 50    }
 51
 52    fn k(&self) -> TorusPrecision {
 53        self.k
 54    }
 55
 56    fn n(&self) -> Degree {
 57        self.n
 58    }
 59}
 60
 61impl GLWEInfos for GGLWELayout {
 62    fn rank(&self) -> Rank {
 63        self.rank_out
 64    }
 65}
 66
 67impl GGLWEInfos for GGLWELayout {
 68    fn rank_in(&self) -> Rank {
 69        self.rank_in
 70    }
 71
 72    fn dsize(&self) -> Dsize {
 73        self.dsize
 74    }
 75
 76    fn rank_out(&self) -> Rank {
 77        self.rank_out
 78    }
 79
 80    fn dnum(&self) -> Dnum {
 81        self.dnum
 82    }
 83}
 84
 85#[derive(PartialEq, Eq, Clone)]
 86pub struct GGLWE<D: Data> {
 87    pub(crate) data: MatZnx<D>,
 88    pub(crate) k: TorusPrecision,
 89    pub(crate) base2k: Base2K,
 90    pub(crate) dsize: Dsize,
 91}
 92
 93impl<D: Data> LWEInfos for GGLWE<D> {
 94    fn base2k(&self) -> Base2K {
 95        self.base2k
 96    }
 97
 98    fn k(&self) -> TorusPrecision {
 99        self.k
100    }
101
102    fn n(&self) -> Degree {
103        Degree(self.data.n() as u32)
104    }
105
106    fn size(&self) -> usize {
107        self.data.size()
108    }
109}
110
111impl<D: Data> GLWEInfos for GGLWE<D> {
112    fn rank(&self) -> Rank {
113        self.rank_out()
114    }
115}
116
117impl<D: Data> GGLWEInfos for GGLWE<D> {
118    fn rank_in(&self) -> Rank {
119        Rank(self.data.cols_in() as u32)
120    }
121
122    fn rank_out(&self) -> Rank {
123        Rank(self.data.cols_out() as u32 - 1)
124    }
125
126    fn dsize(&self) -> Dsize {
127        self.dsize
128    }
129
130    fn dnum(&self) -> Dnum {
131        Dnum(self.data.rows() as u32)
132    }
133}
134
135impl<D: DataRef> GGLWE<D> {
136    pub fn data(&self) -> &MatZnx<D> {
137        &self.data
138    }
139}
140
141impl<D: DataMut> GGLWE<D> {
142    pub fn data_mut(&mut self) -> &mut MatZnx<D> {
143        &mut self.data
144    }
145}
146
147impl<D: DataRef> fmt::Debug for GGLWE<D> {
148    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
149        write!(f, "{self}")
150    }
151}
152
153impl<D: DataMut> FillUniform for GGLWE<D> {
154    fn fill_uniform(&mut self, log_bound: usize, source: &mut Source) {
155        self.data.fill_uniform(log_bound, source);
156    }
157}
158
159impl<D: DataRef> fmt::Display for GGLWE<D> {
160    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
161        write!(
162            f,
163            "(GGLWE: k={} base2k={} dsize={}) {}",
164            self.k().0,
165            self.base2k().0,
166            self.dsize().0,
167            self.data
168        )
169    }
170}
171
172impl<D: DataRef> GGLWE<D> {
173    pub fn at(&self, row: usize, col: usize) -> GLWE<&[u8]> {
174        GLWE {
175            k: self.k,
176            base2k: self.base2k,
177            data: self.data.at(row, col),
178        }
179    }
180}
181
182impl<D: DataMut> GGLWE<D> {
183    pub fn at_mut(&mut self, row: usize, col: usize) -> GLWE<&mut [u8]> {
184        GLWE {
185            k: self.k,
186            base2k: self.base2k,
187            data: self.data.at_mut(row, col),
188        }
189    }
190}
191
192impl GGLWE<Vec<u8>> {
193    pub fn alloc_from_infos<A>(infos: &A) -> Self
194    where
195        A: GGLWEInfos,
196    {
197        Self::alloc(
198            infos.n(),
199            infos.base2k(),
200            infos.k(),
201            infos.rank_in(),
202            infos.rank_out(),
203            infos.dnum(),
204            infos.dsize(),
205        )
206    }
207
208    pub fn alloc(n: Degree, base2k: Base2K, k: TorusPrecision, rank_in: Rank, rank_out: Rank, dnum: Dnum, dsize: Dsize) -> Self {
209        let size: usize = k.0.div_ceil(base2k.0) as usize;
210        debug_assert!(
211            size as u32 > dsize.0,
212            "invalid gglwe: ceil(k/base2k): {size} <= dsize: {}",
213            dsize.0
214        );
215
216        assert!(
217            dnum.0 * dsize.0 <= size as u32,
218            "invalid gglwe: dnum: {} * dsize:{} > ceil(k/base2k): {size}",
219            dnum.0,
220            dsize.0,
221        );
222
223        GGLWE {
224            data: MatZnx::alloc(
225                n.into(),
226                dnum.into(),
227                rank_in.into(),
228                (rank_out + 1).into(),
229                k.0.div_ceil(base2k.0) as usize,
230            ),
231            k,
232            base2k,
233            dsize,
234        }
235    }
236
237    pub fn bytes_of_from_infos<A>(infos: &A) -> usize
238    where
239        A: GGLWEInfos,
240    {
241        Self::bytes_of(
242            infos.n(),
243            infos.base2k(),
244            infos.k(),
245            infos.rank_in(),
246            infos.rank_out(),
247            infos.dnum(),
248            infos.dsize(),
249        )
250    }
251
252    pub fn bytes_of(
253        n: Degree,
254        base2k: Base2K,
255        k: TorusPrecision,
256        rank_in: Rank,
257        rank_out: Rank,
258        dnum: Dnum,
259        dsize: Dsize,
260    ) -> usize {
261        let size: usize = k.0.div_ceil(base2k.0) as usize;
262        debug_assert!(
263            size as u32 > dsize.0,
264            "invalid gglwe: ceil(k/base2k): {size} <= dsize: {}",
265            dsize.0
266        );
267
268        assert!(
269            dnum.0 * dsize.0 <= size as u32,
270            "invalid gglwe: dnum: {} * dsize:{} > ceil(k/base2k): {size}",
271            dnum.0,
272            dsize.0,
273        );
274
275        MatZnx::bytes_of(
276            n.into(),
277            dnum.into(),
278            rank_in.into(),
279            (rank_out + 1).into(),
280            k.0.div_ceil(base2k.0) as usize,
281        )
282    }
283}
284
285pub trait GGLWEToMut {
286    fn to_mut(&mut self) -> GGLWE<&mut [u8]>;
287}
288
289impl<D: DataMut> GGLWEToMut for GGLWE<D> {
290    fn to_mut(&mut self) -> GGLWE<&mut [u8]> {
291        GGLWE {
292            k: self.k(),
293            base2k: self.base2k(),
294            dsize: self.dsize(),
295            data: self.data.to_mut(),
296        }
297    }
298}
299
300pub trait GGLWEToRef {
301    fn to_ref(&self) -> GGLWE<&[u8]>;
302}
303
304impl<D: DataRef> GGLWEToRef for GGLWE<D> {
305    fn to_ref(&self) -> GGLWE<&[u8]> {
306        GGLWE {
307            k: self.k(),
308            base2k: self.base2k(),
309            dsize: self.dsize(),
310            data: self.data.to_ref(),
311        }
312    }
313}
314
315impl<D: DataMut> ReaderFrom for GGLWE<D> {
316    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
317        self.k = TorusPrecision(reader.read_u32::<LittleEndian>()?);
318        self.base2k = Base2K(reader.read_u32::<LittleEndian>()?);
319        self.dsize = Dsize(reader.read_u32::<LittleEndian>()?);
320        self.data.read_from(reader)
321    }
322}
323
324impl<D: DataRef> WriterTo for GGLWE<D> {
325    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
326        writer.write_u32::<LittleEndian>(self.k.0)?;
327        writer.write_u32::<LittleEndian>(self.base2k.0)?;
328        writer.write_u32::<LittleEndian>(self.dsize.0)?;
329        self.data.write_to(writer)
330    }
331}