1use poulpy_hal::{
  2    api::{VecZnxCopy, VecZnxFillUniform},
  3    layouts::{Backend, Data, DataMut, DataRef, FillUniform, Module, ReaderFrom, WriterTo},
  4    source::Source,
  5};
  6
  7use crate::layouts::{
  8    Base2K, Degree, Dnum, Dsize, GGLWEAutomorphismKey, GGLWEInfos, GLWEInfos, LWEInfos, Rank, TorusPrecision,
  9    compressed::{Decompress, GGLWEKeyCompressed, GGLWEKeyCompressedToMut, GGLWEKeyCompressedToRef},
 10};
 11use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
 12use std::fmt;
 13
 14#[derive(PartialEq, Eq, Clone)]
 15pub struct GGLWEAutomorphismKeyCompressed<D: Data> {
 16    pub(crate) key: GGLWEKeyCompressed<D>,
 17    pub(crate) p: i64,
 18}
 19
 20impl<D: Data> LWEInfos for GGLWEAutomorphismKeyCompressed<D> {
 21    fn n(&self) -> Degree {
 22        self.key.n()
 23    }
 24
 25    fn base2k(&self) -> Base2K {
 26        self.key.base2k()
 27    }
 28
 29    fn k(&self) -> TorusPrecision {
 30        self.key.k()
 31    }
 32
 33    fn size(&self) -> usize {
 34        self.key.size()
 35    }
 36}
 37impl<D: Data> GLWEInfos for GGLWEAutomorphismKeyCompressed<D> {
 38    fn rank(&self) -> Rank {
 39        self.rank_out()
 40    }
 41}
 42
 43impl<D: Data> GGLWEInfos for GGLWEAutomorphismKeyCompressed<D> {
 44    fn rank_in(&self) -> Rank {
 45        self.key.rank_in()
 46    }
 47
 48    fn rank_out(&self) -> Rank {
 49        self.key.rank_out()
 50    }
 51
 52    fn dsize(&self) -> Dsize {
 53        self.key.dsize()
 54    }
 55
 56    fn dnum(&self) -> Dnum {
 57        self.key.dnum()
 58    }
 59}
 60
 61impl<D: DataRef> fmt::Debug for GGLWEAutomorphismKeyCompressed<D> {
 62    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 63        write!(f, "{self}")
 64    }
 65}
 66
 67impl<D: DataMut> FillUniform for GGLWEAutomorphismKeyCompressed<D> {
 68    fn fill_uniform(&mut self, log_bound: usize, source: &mut Source) {
 69        self.key.fill_uniform(log_bound, source);
 70    }
 71}
 72
 73impl<D: DataRef> fmt::Display for GGLWEAutomorphismKeyCompressed<D> {
 74    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 75        write!(f, "(AutomorphismKeyCompressed: p={}) {}", self.p, self.key)
 76    }
 77}
 78
 79impl GGLWEAutomorphismKeyCompressed<Vec<u8>> {
 80    pub fn alloc<A>(infos: &A) -> Self
 81    where
 82        A: GGLWEInfos,
 83    {
 84        debug_assert_eq!(infos.rank_in(), infos.rank_out());
 85        Self {
 86            key: GGLWEKeyCompressed::alloc(infos),
 87            p: 0,
 88        }
 89    }
 90
 91    pub fn alloc_with(n: Degree, base2k: Base2K, k: TorusPrecision, rank: Rank, dnum: Dnum, dsize: Dsize) -> Self {
 92        Self {
 93            key: GGLWEKeyCompressed::alloc_with(n, base2k, k, rank, rank, dnum, dsize),
 94            p: 0,
 95        }
 96    }
 97
 98    pub fn alloc_bytes<A>(infos: &A) -> usize
 99    where
100        A: GGLWEInfos,
101    {
102        debug_assert_eq!(infos.rank_in(), infos.rank_out());
103        GGLWEKeyCompressed::alloc_bytes(infos)
104    }
105
106    pub fn alloc_bytes_with(n: Degree, base2k: Base2K, k: TorusPrecision, rank: Rank, dnum: Dnum, dsize: Dsize) -> usize {
107        GGLWEKeyCompressed::alloc_bytes_with(n, base2k, k, rank, dnum, dsize)
108    }
109}
110
111impl<D: DataMut> ReaderFrom for GGLWEAutomorphismKeyCompressed<D> {
112    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
113        self.p = reader.read_u64::<LittleEndian>()? as i64;
114        self.key.read_from(reader)
115    }
116}
117
118impl<D: DataRef> WriterTo for GGLWEAutomorphismKeyCompressed<D> {
119    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
120        writer.write_u64::<LittleEndian>(self.p as u64)?;
121        self.key.write_to(writer)
122    }
123}
124
125impl<D: DataMut, DR: DataRef, B: Backend> Decompress<B, GGLWEAutomorphismKeyCompressed<DR>> for GGLWEAutomorphismKey<D>
126where
127    Module<B>: VecZnxFillUniform + VecZnxCopy,
128{
129    fn decompress(&mut self, module: &Module<B>, other: &GGLWEAutomorphismKeyCompressed<DR>) {
130        self.key.decompress(module, &other.key);
131        self.p = other.p;
132    }
133}
134
135pub trait GGLWEAutomorphismKeyCompressedToRef {
136    fn to_ref(&self) -> GGLWEAutomorphismKeyCompressed<&[u8]>;
137}
138
139impl<D: DataRef> GGLWEAutomorphismKeyCompressedToRef for GGLWEAutomorphismKeyCompressed<D>
140where
141    GGLWEKeyCompressed<D>: GGLWEKeyCompressedToRef,
142{
143    fn to_ref(&self) -> GGLWEAutomorphismKeyCompressed<&[u8]> {
144        GGLWEAutomorphismKeyCompressed {
145            key: self.key.to_ref(),
146            p: self.p,
147        }
148    }
149}
150
151pub trait GGLWEAutomorphismKeyCompressedToMut {
152    fn to_mut(&mut self) -> GGLWEAutomorphismKeyCompressed<&mut [u8]>;
153}
154
155impl<D: DataRef> GGLWEAutomorphismKeyCompressedToMut for GGLWEAutomorphismKeyCompressed<D>
156where
157    GGLWEKeyCompressed<D>: GGLWEKeyCompressedToMut,
158{
159    fn to_mut(&mut self) -> GGLWEAutomorphismKeyCompressed<&mut [u8]> {
160        GGLWEAutomorphismKeyCompressed {
161            p: self.p,
162            key: self.key.to_mut(),
163        }
164    }
165}