1use std::marker::PhantomData;
  2
  3use crate::ffi::vec_znx_dft;
  4use crate::znx_base::ZnxInfos;
  5use crate::{
  6    Backend, DataView, DataViewMut, FFT64, Module, VecZnxBig, ZnxSliceSize, ZnxView, alloc_aligned,
  7};
  8use std::fmt;
  9
 10pub struct VecZnxDft<D, B: Backend> {
 11    pub(crate) data: D,
 12    pub(crate) n: usize,
 13    pub(crate) cols: usize,
 14    pub(crate) size: usize,
 15    pub(crate) _phantom: PhantomData<B>,
 16}
 17
 18impl<D, B: Backend> VecZnxDft<D, B> {
 19    pub fn into_big(self) -> VecZnxBig<D, B> {
 20        VecZnxBig::<D, B>::from_data(self.data, self.n, self.cols, self.size)
 21    }
 22}
 23
 24impl<D, B: Backend> ZnxInfos for VecZnxDft<D, B> {
 25    fn cols(&self) -> usize {
 26        self.cols
 27    }
 28
 29    fn rows(&self) -> usize {
 30        1
 31    }
 32
 33    fn n(&self) -> usize {
 34        self.n
 35    }
 36
 37    fn size(&self) -> usize {
 38        self.size
 39    }
 40}
 41
 42impl<D> ZnxSliceSize for VecZnxDft<D, FFT64> {
 43    fn sl(&self) -> usize {
 44        self.n() * self.cols()
 45    }
 46}
 47
 48impl<D, B: Backend> DataView for VecZnxDft<D, B> {
 49    type D = D;
 50    fn data(&self) -> &Self::D {
 51        &self.data
 52    }
 53}
 54
 55impl<D, B: Backend> DataViewMut for VecZnxDft<D, B> {
 56    fn data_mut(&mut self) -> &mut Self::D {
 57        &mut self.data
 58    }
 59}
 60
 61impl<D: AsRef<[u8]>> ZnxView for VecZnxDft<D, FFT64> {
 62    type Scalar = f64;
 63}
 64
 65pub(crate) fn bytes_of_vec_znx_dft<B: Backend>(module: &Module<B>, cols: usize, size: usize) -> usize {
 66    unsafe { vec_znx_dft::bytes_of_vec_znx_dft(module.ptr, size as u64) as usize * cols }
 67}
 68
 69impl<D: From<Vec<u8>>, B: Backend> VecZnxDft<D, B> {
 70    pub(crate) fn new(module: &Module<B>, cols: usize, size: usize) -> Self {
 71        let data = alloc_aligned::<u8>(bytes_of_vec_znx_dft(module, cols, size));
 72        Self {
 73            data: data.into(),
 74            n: module.n(),
 75            cols,
 76            size,
 77            _phantom: PhantomData,
 78        }
 79    }
 80
 81    pub(crate) fn new_from_bytes(module: &Module<B>, cols: usize, size: usize, bytes: impl Into<Vec<u8>>) -> Self {
 82        let data: Vec<u8> = bytes.into();
 83        assert!(data.len() == bytes_of_vec_znx_dft(module, cols, size));
 84        Self {
 85            data: data.into(),
 86            n: module.n(),
 87            cols,
 88            size,
 89            _phantom: PhantomData,
 90        }
 91    }
 92}
 93
 94pub type VecZnxDftOwned<B> = VecZnxDft<Vec<u8>, B>;
 95
 96impl<D, B: Backend> VecZnxDft<D, B> {
 97    pub(crate) fn from_data(data: D, n: usize, cols: usize, size: usize) -> Self {
 98        Self {
 99            data,
100            n,
101            cols,
102            size,
103            _phantom: PhantomData,
104        }
105    }
106}
107
108pub trait VecZnxDftToRef<B: Backend> {
109    fn to_ref(&self) -> VecZnxDft<&[u8], B>;
110}
111
112impl<D, B: Backend> VecZnxDftToRef<B> for VecZnxDft<D, B>
113where
114    D: AsRef<[u8]>,
115    B: Backend,
116{
117    fn to_ref(&self) -> VecZnxDft<&[u8], B> {
118        VecZnxDft {
119            data: self.data.as_ref(),
120            n: self.n,
121            cols: self.cols,
122            size: self.size,
123            _phantom: std::marker::PhantomData,
124        }
125    }
126}
127
128pub trait VecZnxDftToMut<B: Backend> {
129    fn to_mut(&mut self) -> VecZnxDft<&mut [u8], B>;
130}
131
132impl<D, B: Backend> VecZnxDftToMut<B> for VecZnxDft<D, B>
133where
134    D: AsRef<[u8]> + AsMut<[u8]>,
135    B: Backend,
136{
137    fn to_mut(&mut self) -> VecZnxDft<&mut [u8], B> {
138        VecZnxDft {
139            data: self.data.as_mut(),
140            n: self.n,
141            cols: self.cols,
142            size: self.size,
143            _phantom: std::marker::PhantomData,
144        }
145    }
146}
147
148impl<D: AsRef<[u8]>> fmt::Display for VecZnxDft<D, FFT64> {
149    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
150        writeln!(
151            f,
152            "VecZnxDft(n={}, cols={}, size={})",
153            self.n, self.cols, self.size
154        )?;
155
156        for col in 0..self.cols {
157            writeln!(f, "Column {}:", col)?;
158            for size in 0..self.size {
159                let coeffs = self.at(col, size);
160                write!(f, "  Size {}: [", size)?;
161
162                let max_show = 100;
163                let show_count = coeffs.len().min(max_show);
164
165                for (i, &coeff) in coeffs.iter().take(show_count).enumerate() {
166                    if i > 0 {
167                        write!(f, ", ")?;
168                    }
169                    write!(f, "{}", coeff)?;
170                }
171
172                if coeffs.len() > max_show {
173                    write!(f, ", ... ({} more)", coeffs.len() - max_show)?;
174                }
175
176                writeln!(f, "]")?;
177            }
178        }
179        Ok(())
180    }
181}