updated repo for publishing (#74)

poulpy-core/src/layouts/compressed/glwe_ct.rs

@@ -0,0 +1,177 @@
+use poulpy_backend::hal::{
+    api::{FillUniform, Reset, VecZnxCopy, VecZnxFillUniform},
+    layouts::{Backend, Data, DataMut, DataRef, Module, ReaderFrom, VecZnx, WriterTo},
+    source::Source,
+};
+
+use crate::layouts::{GLWECiphertext, Infos, compressed::Decompress};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+use std::fmt;
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct GLWECiphertextCompressed<D: Data> {
+    pub(crate) data: VecZnx<D>,
+    pub(crate) basek: usize,
+    pub(crate) k: usize,
+    pub(crate) rank: usize,
+    pub(crate) seed: [u8; 32],
+}
+
+impl<D: DataRef> fmt::Debug for GLWECiphertextCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl<D: DataRef> fmt::Display for GLWECiphertextCompressed<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "GLWECiphertextCompressed: basek={} k={} rank={} seed={:?}: {}",
+            self.basek(),
+            self.k(),
+            self.rank,
+            self.seed,
+            self.data
+        )
+    }
+}
+
+impl<D: DataMut> Reset for GLWECiphertextCompressed<D> {
+    fn reset(&mut self) {
+        self.data.reset();
+        self.basek = 0;
+        self.k = 0;
+        self.rank = 0;
+        self.seed = [0u8; 32];
+    }
+}
+
+impl<D: DataMut> FillUniform for GLWECiphertextCompressed<D> {
+    fn fill_uniform(&mut self, source: &mut Source) {
+        self.data.fill_uniform(source);
+    }
+}
+
+impl<D: Data> Infos for GLWECiphertextCompressed<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> GLWECiphertextCompressed<D> {
+    pub fn rank(&self) -> usize {
+        self.rank
+    }
+}
+
+impl GLWECiphertextCompressed<Vec<u8>> {
+    pub fn alloc(n: usize, basek: usize, k: usize, rank: usize) -> Self {
+        Self {
+            data: VecZnx::alloc(n, 1, k.div_ceil(basek)),
+            basek,
+            k,
+            rank,
+            seed: [0u8; 32],
+        }
+    }
+
+    pub fn bytes_of(n: usize, basek: usize, k: usize) -> usize {
+        GLWECiphertext::bytes_of(n, basek, k, 1)
+    }
+}
+
+impl<D: DataMut> ReaderFrom for GLWECiphertextCompressed<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.rank = reader.read_u64::<LittleEndian>()? as usize;
+        reader.read_exact(&mut self.seed)?;
+        self.data.read_from(reader)
+    }
+}
+
+impl<D: DataRef> WriterTo for GLWECiphertextCompressed<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)?;
+        writer.write_u64::<LittleEndian>(self.rank as u64)?;
+        writer.write_all(&self.seed)?;
+        self.data.write_to(writer)
+    }
+}
+
+impl<D: DataMut, B: Backend, DR: DataRef> Decompress<B, GLWECiphertextCompressed<DR>> for GLWECiphertext<D> {
+    fn decompress(&mut self, module: &Module<B>, other: &GLWECiphertextCompressed<DR>)
+    where
+        Module<B>: VecZnxCopy + VecZnxFillUniform,
+    {
+        #[cfg(debug_assertions)]
+        {
+            use poulpy_backend::hal::api::ZnxInfos;
+
+            assert_eq!(
+                self.n(),
+                other.data.n(),
+                "invalid receiver: self.n()={} != other.n()={}",
+                self.n(),
+                other.data.n()
+            );
+            assert_eq!(
+                self.size(),
+                other.size(),
+                "invalid receiver: self.size()={} != other.size()={}",
+                self.size(),
+                other.size()
+            );
+            assert_eq!(
+                self.rank(),
+                other.rank(),
+                "invalid receiver: self.rank()={} != other.rank()={}",
+                self.rank(),
+                other.rank()
+            );
+        }
+
+        let mut source: Source = Source::new(other.seed);
+        self.decompress_internal(module, other, &mut source);
+    }
+}
+
+impl<D: DataMut> GLWECiphertext<D> {
+    pub(crate) fn decompress_internal<DataOther, B: Backend>(
+        &mut self,
+        module: &Module<B>,
+        other: &GLWECiphertextCompressed<DataOther>,
+        source: &mut Source,
+    ) where
+        DataOther: DataRef,
+        Module<B>: VecZnxCopy + VecZnxFillUniform,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert_eq!(self.rank(), other.rank())
+        }
+
+        let k: usize = other.k;
+        let basek: usize = other.basek;
+        let cols: usize = other.rank() + 1;
+        module.vec_znx_copy(&mut self.data, 0, &other.data, 0);
+        (1..cols).for_each(|i| {
+            module.vec_znx_fill_uniform(basek, &mut self.data, i, k, source);
+        });
+
+        self.basek = basek;
+        self.k = k;
+    }
+}