Add Hardware Abstraction Layer (#56)

core/src/glwe/layout.rs

@@ -0,0 +1,123 @@
+use backend::hal::{
+    api::{VecZnxAlloc, VecZnxAllocBytes},
+    layouts::{Backend, Data, DataMut, DataRef, Module, ReaderFrom, VecZnx, VecZnxToMut, VecZnxToRef, WriterTo},
+};
+
+use crate::{GLWEOps, Infos, SetMetaData};
+
+#[derive(PartialEq, Eq)]
+pub struct GLWECiphertext<D: Data> {
+    pub data: VecZnx<D>,
+    pub basek: usize,
+    pub k: usize,
+}
+
+impl GLWECiphertext<Vec<u8>> {
+    pub fn alloc<B: Backend>(module: &Module<B>, basek: usize, k: usize, rank: usize) -> Self
+    where
+        Module<B>: VecZnxAlloc,
+    {
+        Self {
+            data: module.vec_znx_alloc(rank + 1, k.div_ceil(basek)),
+            basek,
+            k,
+        }
+    }
+
+    pub fn bytes_of<B: Backend>(module: &Module<B>, basek: usize, k: usize, rank: usize) -> usize
+    where
+        Module<B>: VecZnxAllocBytes,
+    {
+        module.vec_znx_alloc_bytes(rank + 1, k.div_ceil(basek))
+    }
+}
+
+impl<D: Data> Infos for GLWECiphertext<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> GLWECiphertext<D> {
+    pub fn rank(&self) -> usize {
+        self.cols() - 1
+    }
+}
+
+impl<D: DataRef> GLWECiphertext<D> {
+    pub fn clone(&self) -> GLWECiphertext<Vec<u8>> {
+        GLWECiphertext {
+            data: self.data.clone(),
+            basek: self.basek(),
+            k: self.k(),
+        }
+    }
+}
+
+impl<D: DataMut> SetMetaData for GLWECiphertext<D> {
+    fn set_k(&mut self, k: usize) {
+        self.k = k
+    }
+
+    fn set_basek(&mut self, basek: usize) {
+        self.basek = basek
+    }
+}
+
+pub trait GLWECiphertextToRef: Infos {
+    fn to_ref(&self) -> GLWECiphertext<&[u8]>;
+}
+
+impl<D: DataRef> GLWECiphertextToRef for GLWECiphertext<D> {
+    fn to_ref(&self) -> GLWECiphertext<&[u8]> {
+        GLWECiphertext {
+            data: self.data.to_ref(),
+            basek: self.basek,
+            k: self.k,
+        }
+    }
+}
+
+pub trait GLWECiphertextToMut: Infos {
+    fn to_mut(&mut self) -> GLWECiphertext<&mut [u8]>;
+}
+
+impl<D: DataMut> GLWECiphertextToMut for GLWECiphertext<D> {
+    fn to_mut(&mut self) -> GLWECiphertext<&mut [u8]> {
+        GLWECiphertext {
+            data: self.data.to_mut(),
+            basek: self.basek,
+            k: self.k,
+        }
+    }
+}
+
+impl<D: DataMut> GLWEOps for GLWECiphertext<D> where GLWECiphertext<D>: GLWECiphertextToMut + Infos + SetMetaData {}
+
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+
+impl<D: DataMut> ReaderFrom for GLWECiphertext<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;
+        self.data.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for GLWECiphertext<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)?;
+        self.data.write_to(writer)
+    }
+}