core refactoring (#69)

core/src/layouts/glwe_pk.rs

@@ -0,0 +1,73 @@
+use backend::hal::layouts::{Data, DataMut, DataRef, ReaderFrom, VecZnx, WriterTo};
+
+use crate::{dist::Distribution, layouts::Infos};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+
+#[derive(PartialEq, Eq)]
+pub struct GLWEPublicKey<D: Data> {
+    pub(crate) data: VecZnx<D>,
+    pub(crate) basek: usize,
+    pub(crate) k: usize,
+    pub(crate) dist: Distribution,
+}
+
+impl GLWEPublicKey<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rank: usize) -> Self {
+        Self {
+            data: VecZnx::alloc(n, rank + 1, k.div_ceil(basek)),
+            basek: basek,
+            k: k,
+            dist: Distribution::NONE,
+        }
+    }
+
+    pub fn bytes_of(n: usize, basek: usize, k: usize, rank: usize) -> usize {
+        VecZnx::alloc_bytes(n, rank + 1, k.div_ceil(basek))
+    }
+}
+
+impl<D: Data> Infos for GLWEPublicKey<D> {
+    type Inner = VecZnx<D>;
+
+    fn inner(&self) -> &Self::Inner {
+        &self.data
+    }
+
+    fn basek(&self) -> usize {
+        self.basek
+    }
+
+    fn k(&self) -> usize {
+        self.k
+    }
+}
+
+impl<D: Data> GLWEPublicKey<D> {
+    pub fn rank(&self) -> usize {
+        self.cols() - 1
+    }
+}
+
+impl<D: DataMut> ReaderFrom for GLWEPublicKey<D> {
+    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
+        self.k = reader.read_u64::<LittleEndian>()? as usize;
+        self.basek = reader.read_u64::<LittleEndian>()? as usize;
+        match Distribution::read_from(reader) {
+            Ok(dist) => self.dist = dist,
+            Err(e) => return Err(e),
+        }
+        self.data.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for GLWEPublicKey<D> {
+    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
+        writer.write_u64::<LittleEndian>(self.k as u64)?;
+        writer.write_u64::<LittleEndian>(self.basek as u64)?;
+        match self.dist.write_to(writer) {
+            Ok(()) => {}
+            Err(e) => return Err(e),
+        }
+        self.data.write_to(writer)
+    }
+}