1use std::fmt;
  2
  3use crate::{
  4    alloc_aligned,
  5    hal::{
  6        api::{DataView, DataViewMut, FillUniform, Reset, ZnxInfos, ZnxSliceSize, ZnxView, ZnxViewMut, ZnxZero},
  7        layouts::{Data, DataMut, DataRef, ReaderFrom, WriterTo},
  8    },
  9};
 10
 11#[derive(PartialEq, Eq, Clone)]
 12pub struct VecZnx<D: Data> {
 13    pub(crate) data: D,
 14    pub(crate) n: usize,
 15    pub(crate) cols: usize,
 16    pub(crate) size: usize,
 17    pub(crate) max_size: usize,
 18}
 19
 20impl<D: DataRef> fmt::Debug for VecZnx<D> {
 21    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 22        write!(f, "{}", self)
 23    }
 24}
 25
 26impl<D: Data> ZnxInfos for VecZnx<D> {
 27    fn cols(&self) -> usize {
 28        self.cols
 29    }
 30
 31    fn rows(&self) -> usize {
 32        1
 33    }
 34
 35    fn n(&self) -> usize {
 36        self.n
 37    }
 38
 39    fn size(&self) -> usize {
 40        self.size
 41    }
 42}
 43
 44impl<D: Data> ZnxSliceSize for VecZnx<D> {
 45    fn sl(&self) -> usize {
 46        self.n() * self.cols()
 47    }
 48}
 49
 50impl<D: Data> DataView for VecZnx<D> {
 51    type D = D;
 52    fn data(&self) -> &Self::D {
 53        &self.data
 54    }
 55}
 56
 57impl<D: Data> DataViewMut for VecZnx<D> {
 58    fn data_mut(&mut self) -> &mut Self::D {
 59        &mut self.data
 60    }
 61}
 62
 63impl<D: DataRef> ZnxView for VecZnx<D> {
 64    type Scalar = i64;
 65}
 66
 67impl VecZnx<Vec<u8>> {
 68    pub fn rsh_scratch_space(n: usize) -> usize {
 69        n * std::mem::size_of::<i64>()
 70    }
 71}
 72
 73impl<D: DataMut> ZnxZero for VecZnx<D> {
 74    fn zero(&mut self) {
 75        self.raw_mut().fill(0)
 76    }
 77    fn zero_at(&mut self, i: usize, j: usize) {
 78        self.at_mut(i, j).fill(0);
 79    }
 80}
 81
 82impl VecZnx<Vec<u8>> {
 83    pub fn alloc_bytes(n: usize, cols: usize, size: usize) -> usize {
 84        n * cols * size * size_of::<i64>()
 85    }
 86
 87    pub fn alloc(n: usize, cols: usize, size: usize) -> Self {
 88        let data: Vec<u8> = alloc_aligned::<u8>(Self::alloc_bytes(n, cols, size));
 89        Self {
 90            data: data.into(),
 91            n,
 92            cols,
 93            size,
 94            max_size: size,
 95        }
 96    }
 97
 98    pub fn from_bytes<Scalar: Sized>(n: usize, cols: usize, size: usize, bytes: impl Into<Vec<u8>>) -> Self {
 99        let data: Vec<u8> = bytes.into();
100        assert!(data.len() == Self::alloc_bytes(n, cols, size));
101        Self {
102            data: data.into(),
103            n,
104            cols,
105            size,
106            max_size: size,
107        }
108    }
109}
110
111impl<D: Data> VecZnx<D> {
112    pub fn from_data(data: D, n: usize, cols: usize, size: usize) -> Self {
113        Self {
114            data,
115            n,
116            cols,
117            size,
118            max_size: size,
119        }
120    }
121}
122
123impl<D: DataRef> fmt::Display for VecZnx<D> {
124    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
125        writeln!(
126            f,
127            "VecZnx(n={}, cols={}, size={})",
128            self.n, self.cols, self.size
129        )?;
130
131        for col in 0..self.cols {
132            writeln!(f, "Column {}:", col)?;
133            for size in 0..self.size {
134                let coeffs = self.at(col, size);
135                write!(f, "  Size {}: [", size)?;
136
137                let max_show = 100;
138                let show_count = coeffs.len().min(max_show);
139
140                for (i, &coeff) in coeffs.iter().take(show_count).enumerate() {
141                    if i > 0 {
142                        write!(f, ", ")?;
143                    }
144                    write!(f, "{}", coeff)?;
145                }
146
147                if coeffs.len() > max_show {
148                    write!(f, ", ... ({} more)", coeffs.len() - max_show)?;
149                }
150
151                writeln!(f, "]")?;
152            }
153        }
154        Ok(())
155    }
156}
157
158impl<D: DataMut> FillUniform for VecZnx<D> {
159    fn fill_uniform(&mut self, source: &mut Source) {
160        source.fill_bytes(self.data.as_mut());
161    }
162}
163
164impl<D: DataMut> Reset for VecZnx<D> {
165    fn reset(&mut self) {
166        self.zero();
167        self.n = 0;
168        self.cols = 0;
169        self.size = 0;
170        self.max_size = 0;
171    }
172}
173
174pub type VecZnxOwned = VecZnx<Vec<u8>>;
175pub type VecZnxMut<'a> = VecZnx<&'a mut [u8]>;
176pub type VecZnxRef<'a> = VecZnx<&'a [u8]>;
177
178pub trait VecZnxToRef {
179    fn to_ref(&self) -> VecZnx<&[u8]>;
180}
181
182impl<D: DataRef> VecZnxToRef for VecZnx<D> {
183    fn to_ref(&self) -> VecZnx<&[u8]> {
184        VecZnx {
185            data: self.data.as_ref(),
186            n: self.n,
187            cols: self.cols,
188            size: self.size,
189            max_size: self.max_size,
190        }
191    }
192}
193
194pub trait VecZnxToMut {
195    fn to_mut(&mut self) -> VecZnx<&mut [u8]>;
196}
197
198impl<D: DataMut> VecZnxToMut for VecZnx<D> {
199    fn to_mut(&mut self) -> VecZnx<&mut [u8]> {
200        VecZnx {
201            data: self.data.as_mut(),
202            n: self.n,
203            cols: self.cols,
204            size: self.size,
205            max_size: self.max_size,
206        }
207    }
208}
209
210impl<D: DataRef> VecZnx<D> {
211    pub fn clone(&self) -> VecZnx<Vec<u8>> {
212        let self_ref: VecZnx<&[u8]> = self.to_ref();
213        VecZnx {
214            data: self_ref.data.to_vec(),
215            n: self_ref.n,
216            cols: self_ref.cols,
217            size: self_ref.size,
218            max_size: self_ref.max_size,
219        }
220    }
221}
222
223use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
224use rand::RngCore;
225use sampling::source::Source;
226
227impl<D: DataMut> ReaderFrom for VecZnx<D> {
228    fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
229        self.n = reader.read_u64::<LittleEndian>()? as usize;
230        self.cols = reader.read_u64::<LittleEndian>()? as usize;
231        self.size = reader.read_u64::<LittleEndian>()? as usize;
232        self.max_size = reader.read_u64::<LittleEndian>()? as usize;
233        let len: usize = reader.read_u64::<LittleEndian>()? as usize;
234        let buf: &mut [u8] = self.data.as_mut();
235        if buf.len() != len {
236            return Err(std::io::Error::new(
237                std::io::ErrorKind::UnexpectedEof,
238                format!("self.data.len()={} != read len={}", buf.len(), len),
239            ));
240        }
241        reader.read_exact(&mut buf[..len])?;
242        Ok(())
243    }
244}
245
246impl<D: DataRef> WriterTo for VecZnx<D> {
247    fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
248        writer.write_u64::<LittleEndian>(self.n as u64)?;
249        writer.write_u64::<LittleEndian>(self.cols as u64)?;
250        writer.write_u64::<LittleEndian>(self.size as u64)?;
251        writer.write_u64::<LittleEndian>(self.max_size as u64)?;
252        let buf: &[u8] = self.data.as_ref();
253        writer.write_u64::<LittleEndian>(buf.len() as u64)?;
254        writer.write_all(buf)?;
255        Ok(())
256    }
257}