Added trace operation + test and renamed base2k to backend

backend/src/vec_znx_dft.rs

@@ -0,0 +1,242 @@
+use std::marker::PhantomData;
+
+use crate::ffi::vec_znx_dft;
+use crate::znx_base::ZnxInfos;
+use crate::{
+    Backend, DataView, DataViewMut, FFT64, Module, VecZnxBig, ZnxSliceSize, ZnxView, ZnxViewMut, ZnxZero, alloc_aligned,
+};
+use std::fmt;
+
+pub struct VecZnxDft<D, B: Backend> {
+    pub(crate) data: D,
+    pub(crate) n: usize,
+    pub(crate) cols: usize,
+    pub(crate) size: usize,
+    pub(crate) _phantom: PhantomData<B>,
+}
+
+impl<D, B: Backend> VecZnxDft<D, B> {
+    pub fn into_big(self) -> VecZnxBig<D, B> {
+        VecZnxBig::<D, B>::from_data(self.data, self.n, self.cols, self.size)
+    }
+}
+
+impl<D, B: Backend> ZnxInfos for VecZnxDft<D, B> {
+    fn cols(&self) -> usize {
+        self.cols
+    }
+
+    fn rows(&self) -> usize {
+        1
+    }
+
+    fn n(&self) -> usize {
+        self.n
+    }
+
+    fn size(&self) -> usize {
+        self.size
+    }
+}
+
+impl<D> ZnxSliceSize for VecZnxDft<D, FFT64> {
+    fn sl(&self) -> usize {
+        self.n() * self.cols()
+    }
+}
+
+impl<D, B: Backend> DataView for VecZnxDft<D, B> {
+    type D = D;
+    fn data(&self) -> &Self::D {
+        &self.data
+    }
+}
+
+impl<D, B: Backend> DataViewMut for VecZnxDft<D, B> {
+    fn data_mut(&mut self) -> &mut Self::D {
+        &mut self.data
+    }
+}
+
+impl<D: AsRef<[u8]>> ZnxView for VecZnxDft<D, FFT64> {
+    type Scalar = f64;
+}
+
+pub(crate) fn bytes_of_vec_znx_dft<B: Backend>(module: &Module<B>, cols: usize, size: usize) -> usize {
+    unsafe { vec_znx_dft::bytes_of_vec_znx_dft(module.ptr, size as u64) as usize * cols }
+}
+
+impl<D: From<Vec<u8>>, B: Backend> VecZnxDft<D, B> {
+    pub(crate) fn new(module: &Module<B>, cols: usize, size: usize) -> Self {
+        let data = alloc_aligned::<u8>(bytes_of_vec_znx_dft(module, cols, size));
+        Self {
+            data: data.into(),
+            n: module.n(),
+            cols,
+            size,
+            _phantom: PhantomData,
+        }
+    }
+
+    pub(crate) fn new_from_bytes(module: &Module<B>, cols: usize, size: usize, bytes: impl Into<Vec<u8>>) -> Self {
+        let data: Vec<u8> = bytes.into();
+        assert!(data.len() == bytes_of_vec_znx_dft(module, cols, size));
+        Self {
+            data: data.into(),
+            n: module.n(),
+            cols,
+            size,
+            _phantom: PhantomData,
+        }
+    }
+}
+
+impl<D> VecZnxDft<D, FFT64>
+where
+    VecZnxDft<D, FFT64>: VecZnxDftToMut<FFT64> + ZnxInfos,
+{
+    /// Extracts the a_col-th column of 'a' and stores it on the self_col-th column [Self].
+    pub fn extract_column<C>(&mut self, self_col: usize, a: &VecZnxDft<C, FFT64>, a_col: usize)
+    where
+        VecZnxDft<C, FFT64>: VecZnxDftToRef<FFT64> + ZnxInfos,
+    {
+        #[cfg(debug_assertions)]
+        {
+            assert!(self_col < self.cols());
+            assert!(a_col < a.cols());
+        }
+
+        let min_size: usize = self.size.min(a.size());
+        let max_size: usize = self.size;
+
+        let mut self_mut: VecZnxDft<&mut [u8], FFT64> = self.to_mut();
+        let a_ref: VecZnxDft<&[u8], FFT64> = a.to_ref();
+
+        (0..min_size).for_each(|i: usize| {
+            self_mut
+                .at_mut(self_col, i)
+                .copy_from_slice(a_ref.at(a_col, i));
+        });
+
+        (min_size..max_size).for_each(|i| {
+            self_mut.zero_at(self_col, i);
+        });
+    }
+}
+
+pub type VecZnxDftOwned<B> = VecZnxDft<Vec<u8>, B>;
+
+impl<D, B: Backend> VecZnxDft<D, B> {
+    pub(crate) fn from_data(data: D, n: usize, cols: usize, size: usize) -> Self {
+        Self {
+            data,
+            n,
+            cols,
+            size,
+            _phantom: PhantomData,
+        }
+    }
+}
+
+pub trait VecZnxDftToRef<B: Backend> {
+    fn to_ref(&self) -> VecZnxDft<&[u8], B>;
+}
+
+pub trait VecZnxDftToMut<B: Backend> {
+    fn to_mut(&mut self) -> VecZnxDft<&mut [u8], B>;
+}
+
+impl<B: Backend> VecZnxDftToMut<B> for VecZnxDft<Vec<u8>, B> {
+    fn to_mut(&mut self) -> VecZnxDft<&mut [u8], B> {
+        VecZnxDft {
+            data: self.data.as_mut_slice(),
+            n: self.n,
+            cols: self.cols,
+            size: self.size,
+            _phantom: PhantomData,
+        }
+    }
+}
+
+impl<B: Backend> VecZnxDftToRef<B> for VecZnxDft<Vec<u8>, B> {
+    fn to_ref(&self) -> VecZnxDft<&[u8], B> {
+        VecZnxDft {
+            data: self.data.as_slice(),
+            n: self.n,
+            cols: self.cols,
+            size: self.size,
+            _phantom: PhantomData,
+        }
+    }
+}
+
+impl<B: Backend> VecZnxDftToMut<B> for VecZnxDft<&mut [u8], B> {
+    fn to_mut(&mut self) -> VecZnxDft<&mut [u8], B> {
+        VecZnxDft {
+            data: self.data,
+            n: self.n,
+            cols: self.cols,
+            size: self.size,
+            _phantom: PhantomData,
+        }
+    }
+}
+
+impl<B: Backend> VecZnxDftToRef<B> for VecZnxDft<&mut [u8], B> {
+    fn to_ref(&self) -> VecZnxDft<&[u8], B> {
+        VecZnxDft {
+            data: self.data,
+            n: self.n,
+            cols: self.cols,
+            size: self.size,
+            _phantom: PhantomData,
+        }
+    }
+}
+
+impl<B: Backend> VecZnxDftToRef<B> for VecZnxDft<&[u8], B> {
+    fn to_ref(&self) -> VecZnxDft<&[u8], B> {
+        VecZnxDft {
+            data: self.data,
+            n: self.n,
+            cols: self.cols,
+            size: self.size,
+            _phantom: PhantomData,
+        }
+    }
+}
+
+impl<D: AsRef<[u8]>> fmt::Display for VecZnxDft<D, FFT64> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        writeln!(
+            f,
+            "VecZnxDft(n={}, cols={}, size={})",
+            self.n, self.cols, self.size
+        )?;
+
+        for col in 0..self.cols {
+            writeln!(f, "Column {}:", col)?;
+            for size in 0..self.size {
+                let coeffs = self.at(col, size);
+                write!(f, "  Size {}: [", size)?;
+
+                let max_show = 100;
+                let show_count = coeffs.len().min(max_show);
+
+                for (i, &coeff) in coeffs.iter().take(show_count).enumerate() {
+                    if i > 0 {
+                        write!(f, ", ")?;
+                    }
+                    write!(f, "{}", coeff)?;
+                }
+
+                if coeffs.len() > max_show {
+                    write!(f, ", ... ({} more)", coeffs.len() - max_show)?;
+                }
+
+                writeln!(f, "]")?;
+            }
+        }
+        Ok(())
+    }
+}