1use backend::{Backend, FFT64, Module, VecZnx, VecZnxAlloc, VecZnxDftOps, VecZnxToMut, VecZnxToRef};
  2
  3use crate::{FourierGLWECiphertext, GLWEOps, Infos, SetMetaData};
  4
  5pub struct GLWECiphertext<C> {
  6    pub data: VecZnx<C>,
  7    pub basek: usize,
  8    pub k: usize,
  9}
 10
 11impl GLWECiphertext<Vec<u8>> {
 12    pub fn alloc<B: Backend>(module: &Module<B>, basek: usize, k: usize, rank: usize) -> Self {
 13        Self {
 14            data: module.new_vec_znx(rank + 1, k.div_ceil(basek)),
 15            basek,
 16            k,
 17        }
 18    }
 19
 20    pub fn bytes_of(module: &Module<FFT64>, basek: usize, k: usize, rank: usize) -> usize {
 21        module.bytes_of_vec_znx(rank + 1, k.div_ceil(basek))
 22    }
 23}
 24
 25impl<T> Infos for GLWECiphertext<T> {
 26    type Inner = VecZnx<T>;
 27
 28    fn inner(&self) -> &Self::Inner {
 29        &self.data
 30    }
 31
 32    fn basek(&self) -> usize {
 33        self.basek
 34    }
 35
 36    fn k(&self) -> usize {
 37        self.k
 38    }
 39}
 40
 41impl<T> GLWECiphertext<T> {
 42    pub fn rank(&self) -> usize {
 43        self.cols() - 1
 44    }
 45}
 46
 47impl<C: AsRef<[u8]>> GLWECiphertext<C> {
 48    #[allow(dead_code)]
 49    pub(crate) fn dft<R: AsMut<[u8]> + AsRef<[u8]>>(&self, module: &Module<FFT64>, res: &mut FourierGLWECiphertext<R, FFT64>) {
 50        #[cfg(debug_assertions)]
 51        {
 52            assert_eq!(self.rank(), res.rank());
 53            assert_eq!(self.basek(), res.basek())
 54        }
 55
 56        (0..self.rank() + 1).for_each(|i| {
 57            module.vec_znx_dft(1, 0, &mut res.data, i, &self.data, i);
 58        })
 59    }
 60}
 61
 62impl<DataSelf: AsRef<[u8]>> GLWECiphertext<DataSelf> {
 63    pub fn clone(&self) -> GLWECiphertext<Vec<u8>> {
 64        GLWECiphertext {
 65            data: self.data.clone(),
 66            basek: self.basek(),
 67            k: self.k(),
 68        }
 69    }
 70}
 71
 72impl<DataSelf: AsMut<[u8]> + AsRef<[u8]>> SetMetaData for GLWECiphertext<DataSelf> {
 73    fn set_k(&mut self, k: usize) {
 74        self.k = k
 75    }
 76
 77    fn set_basek(&mut self, basek: usize) {
 78        self.basek = basek
 79    }
 80}
 81
 82pub trait GLWECiphertextToRef: Infos {
 83    fn to_ref(&self) -> GLWECiphertext<&[u8]>;
 84}
 85
 86impl<D: AsRef<[u8]>> GLWECiphertextToRef for GLWECiphertext<D> {
 87    fn to_ref(&self) -> GLWECiphertext<&[u8]> {
 88        GLWECiphertext {
 89            data: self.data.to_ref(),
 90            basek: self.basek,
 91            k: self.k,
 92        }
 93    }
 94}
 95
 96pub trait GLWECiphertextToMut: Infos {
 97    fn to_mut(&mut self) -> GLWECiphertext<&mut [u8]>;
 98}
 99
100impl<D: AsMut<[u8]> + AsRef<[u8]>> GLWECiphertextToMut for GLWECiphertext<D> {
101    fn to_mut(&mut self) -> GLWECiphertext<&mut [u8]> {
102        GLWECiphertext {
103            data: self.data.to_mut(),
104            basek: self.basek,
105            k: self.k,
106        }
107    }
108}
109
110impl<D> GLWEOps for GLWECiphertext<D>
111where
112    D: AsRef<[u8]> + AsMut<[u8]>,
113    GLWECiphertext<D>: GLWECiphertextToMut + Infos + SetMetaData,
114{
115}