Traits reduction, file + structs renaming

poulpy-core/src/layouts/lwe.rs

@@ -0,0 +1,199 @@
+use std::fmt;
+
+use poulpy_hal::{
+    layouts::{Data, DataMut, DataRef, FillUniform, ReaderFrom, WriterTo, Zn, ZnToMut, ZnToRef, ZnxInfos},
+    source::Source,
+};
+
+use crate::layouts::{Base2K, Degree, TorusPrecision};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+
+pub trait LWEInfos {
+    fn n(&self) -> Degree;
+    fn k(&self) -> TorusPrecision;
+    fn max_k(&self) -> TorusPrecision {
+        TorusPrecision(self.k().0 * self.size() as u32)
+    }
+    fn base2k(&self) -> Base2K;
+    fn size(&self) -> usize {
+        self.k().0.div_ceil(self.base2k().0) as usize
+    }
+    fn lwe_layout(&self) -> LWELayout {
+        LWELayout {
+            n: self.n(),
+            k: self.k(),
+            base2k: self.base2k(),
+        }
+    }
+}
+
+pub trait SetLWEInfos {
+    fn set_k(&mut self, k: TorusPrecision);
+    fn set_base2k(&mut self, base2k: Base2K);
+}
+
+#[derive(PartialEq, Eq, Copy, Clone, Debug)]
+pub struct LWELayout {
+    pub n: Degree,
+    pub k: TorusPrecision,
+    pub base2k: Base2K,
+}
+
+impl LWEInfos for LWELayout {
+    fn base2k(&self) -> Base2K {
+        self.base2k
+    }
+
+    fn k(&self) -> TorusPrecision {
+        self.k
+    }
+
+    fn n(&self) -> Degree {
+        self.n
+    }
+}
+#[derive(PartialEq, Eq, Clone)]
+pub struct LWE<D: Data> {
+    pub(crate) data: Zn<D>,
+    pub(crate) k: TorusPrecision,
+    pub(crate) base2k: Base2K,
+}
+
+impl<D: Data> LWEInfos for LWE<D> {
+    fn base2k(&self) -> Base2K {
+        self.base2k
+    }
+
+    fn k(&self) -> TorusPrecision {
+        self.k
+    }
+    fn n(&self) -> Degree {
+        Degree(self.data.n() as u32 - 1)
+    }
+
+    fn size(&self) -> usize {
+        self.data.size()
+    }
+}
+
+impl<D: Data> SetLWEInfos for LWE<D> {
+    fn set_base2k(&mut self, base2k: Base2K) {
+        self.base2k = base2k
+    }
+
+    fn set_k(&mut self, k: TorusPrecision) {
+        self.k = k
+    }
+}
+
+impl<D: DataRef> LWE<D> {
+    pub fn data(&self) -> &Zn<D> {
+        &self.data
+    }
+}
+
+impl<D: DataMut> LWE<D> {
+    pub fn data_mut(&mut self) -> &Zn<D> {
+        &mut self.data
+    }
+}
+
+impl<D: DataRef> fmt::Debug for LWE<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{self}")
+    }
+}
+
+impl<D: DataRef> fmt::Display for LWE<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "LWE: base2k={} k={}: {}",
+            self.base2k().0,
+            self.k().0,
+            self.data
+        )
+    }
+}
+
+impl<D: DataMut> FillUniform for LWE<D>
+where
+    Zn<D>: FillUniform,
+{
+    fn fill_uniform(&mut self, log_bound: usize, source: &mut Source) {
+        self.data.fill_uniform(log_bound, source);
+    }
+}
+
+impl LWE<Vec<u8>> {
+    pub fn alloc_from_infos<A>(infos: &A) -> Self
+    where
+        A: LWEInfos,
+    {
+        Self::alloc(infos.n(), infos.base2k(), infos.k())
+    }
+
+    pub fn alloc(n: Degree, base2k: Base2K, k: TorusPrecision) -> Self {
+        LWE {
+            data: Zn::alloc((n + 1).into(), 1, k.0.div_ceil(base2k.0) as usize),
+            k,
+            base2k,
+        }
+    }
+
+    pub fn bytes_of_from_infos<A>(infos: &A) -> usize
+    where
+        A: LWEInfos,
+    {
+        Self::bytes_of(infos.n(), infos.base2k(), infos.k())
+    }
+
+    pub fn bytes_of(n: Degree, base2k: Base2K, k: TorusPrecision) -> usize {
+        Zn::bytes_of((n + 1).into(), 1, k.0.div_ceil(base2k.0) as usize)
+    }
+}
+
+pub trait LWEToRef {
+    fn to_ref(&self) -> LWE<&[u8]>;
+}
+
+impl<D: DataRef> LWEToRef for LWE<D> {
+    fn to_ref(&self) -> LWE<&[u8]> {
+        LWE {
+            k: self.k,
+            base2k: self.base2k,
+            data: self.data.to_ref(),
+        }
+    }
+}
+
+pub trait LWEToMut {
+    #[allow(dead_code)]
+    fn to_mut(&mut self) -> LWE<&mut [u8]>;
+}
+
+impl<D: DataMut> LWEToMut for LWE<D> {
+    fn to_mut(&mut self) -> LWE<&mut [u8]> {
+        LWE {
+            k: self.k,
+            base2k: self.base2k,
+            data: self.data.to_mut(),
+        }
+    }
+}
+
+impl<D: DataMut> ReaderFrom for LWE<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.k = TorusPrecision(reader.read_u32::<LittleEndian>()?);
+        self.base2k = Base2K(reader.read_u32::<LittleEndian>()?);
+        self.data.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for LWE<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        writer.write_u32::<LittleEndian>(self.k.into())?;
+        writer.write_u32::<LittleEndian>(self.base2k.into())?;
+        self.data.write_to(writer)
+    }
+}