use poulpy_hal::{
layouts::{Backend, Data, FillUniform, HostDataMut, HostDataRef, ReaderFrom, WriterTo},
source::Source,
};
use crate::{
DeclaredK,
layouts::{
Base2K, Degree, Dnum, Dsize, GGLWE, GGLWEBackendMut, GGLWEInfos, GGLWEToBackendMut, GGLWEToBackendRef, GLWEInfos,
LWEInfos, Rank, TorusPrecision,
},
};
use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
use std::{
fmt,
ops::{Deref, DerefMut},
};
#[derive(PartialEq, Eq, Copy, Clone, Debug)]
pub struct GGLWEToGGSWKeyLayout {
pub n: Degree,
pub base2k: Base2K,
pub k: TorusPrecision,
pub rank: Rank,
pub dnum: Dnum,
pub dsize: Dsize,
}
impl DeclaredK for GGLWEToGGSWKeyLayout {
fn k(&self) -> TorusPrecision {
self.k
}
}
#[derive(PartialEq, Eq, Clone)]
pub struct GGLWEToGGSWKey<D: Data> {
pub(crate) keys: Vec<GGLWE<D>>,
}
pub struct GGLWEToGGSWKeyBackendRef<'a, BE: Backend + 'a> {
inner: GGLWEToGGSWKey<BE::BufRef<'a>>,
}
impl<'a, BE: Backend + 'a> GGLWEToGGSWKeyBackendRef<'a, BE> {
pub fn from_inner(inner: GGLWEToGGSWKey<BE::BufRef<'a>>) -> Self {
Self { inner }
}
pub fn into_inner(self) -> GGLWEToGGSWKey<BE::BufRef<'a>> {
self.inner
}
pub fn at_view(&self, i: usize) -> crate::layouts::GGLWEBackendRef<'_, BE> {
assert!((i as u32) < self.rank());
let key_i = &self.inner.keys[i];
crate::layouts::GGLWEBackendRef::from_inner(GGLWE {
base2k: key_i.base2k,
dsize: key_i.dsize,
data: poulpy_hal::layouts::mat_znx_backend_ref_from_ref::<BE>(&key_i.data),
})
}
}
impl<'a, BE: Backend + 'a> Deref for GGLWEToGGSWKeyBackendRef<'a, BE> {
type Target = GGLWEToGGSWKey<BE::BufRef<'a>>;
fn deref(&self) -> &Self::Target {
&self.inner
}
}
pub struct GGLWEToGGSWKeyBackendMut<'a, BE: Backend + 'a> {
inner: GGLWEToGGSWKey<BE::BufMut<'a>>,
}
impl<'a, BE: Backend + 'a> GGLWEToGGSWKeyBackendMut<'a, BE> {
pub fn from_inner(inner: GGLWEToGGSWKey<BE::BufMut<'a>>) -> Self {
Self { inner }
}
pub fn into_inner(self) -> GGLWEToGGSWKey<BE::BufMut<'a>> {
self.inner
}
pub fn at_view(&self, i: usize) -> crate::layouts::GGLWEBackendRef<'_, BE> {
assert!((i as u32) < self.rank());
let key_i = &self.inner.keys[i];
crate::layouts::GGLWEBackendRef::from_inner(GGLWE {
base2k: key_i.base2k,
dsize: key_i.dsize,
data: poulpy_hal::layouts::mat_znx_backend_ref_from_mut::<BE>(&key_i.data),
})
}
pub fn at_view_mut(&mut self, i: usize) -> GGLWEBackendMut<'_, BE> {
assert!((i as u32) < self.rank());
let key_i = &mut self.inner.keys[i];
GGLWEBackendMut::from_inner(GGLWE {
base2k: key_i.base2k,
dsize: key_i.dsize,
data: poulpy_hal::layouts::mat_znx_backend_mut_from_mut::<BE>(&mut key_i.data),
})
}
}
impl<'a, BE: Backend + 'a> Deref for GGLWEToGGSWKeyBackendMut<'a, BE> {
type Target = GGLWEToGGSWKey<BE::BufMut<'a>>;
fn deref(&self) -> &Self::Target {
&self.inner
}
}
impl<'a, BE: Backend + 'a> DerefMut for GGLWEToGGSWKeyBackendMut<'a, BE> {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.inner
}
}
impl_gglwe_infos_for_inner!(GGLWEToGGSWKeyBackendRef<'a, BE>, ['a, BE: Backend + 'a]; inner);
impl_gglwe_infos_for_inner!(GGLWEToGGSWKeyBackendMut<'a, BE>, ['a, BE: Backend + 'a]; inner);
impl<D: Data> LWEInfos for GGLWEToGGSWKey<D> {
fn n(&self) -> Degree {
self.keys[0].n()
}
fn base2k(&self) -> Base2K {
self.keys[0].base2k()
}
fn size(&self) -> usize {
self.keys[0].size()
}
}
impl<D: Data> GLWEInfos for GGLWEToGGSWKey<D> {
fn rank(&self) -> Rank {
self.keys[0].rank_out()
}
}
impl<D: Data> GGLWEInfos for GGLWEToGGSWKey<D> {
fn rank_in(&self) -> Rank {
self.rank_out()
}
fn rank_out(&self) -> Rank {
self.keys[0].rank_out()
}
fn dsize(&self) -> Dsize {
self.keys[0].dsize()
}
fn dnum(&self) -> Dnum {
self.keys[0].dnum()
}
}
impl LWEInfos for GGLWEToGGSWKeyLayout {
fn n(&self) -> Degree {
self.n
}
fn base2k(&self) -> Base2K {
self.base2k
}
fn size(&self) -> usize {
self.k.as_usize().div_ceil(self.base2k.as_usize())
}
}
impl GLWEInfos for GGLWEToGGSWKeyLayout {
fn rank(&self) -> Rank {
self.rank_out()
}
}
impl GGLWEInfos for GGLWEToGGSWKeyLayout {
fn rank_in(&self) -> Rank {
self.rank
}
fn dsize(&self) -> Dsize {
self.dsize
}
fn rank_out(&self) -> Rank {
self.rank
}
fn dnum(&self) -> Dnum {
self.dnum
}
}
impl<D: HostDataRef> fmt::Debug for GGLWEToGGSWKey<D> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{self}")
}
}
impl<D: HostDataMut> FillUniform for GGLWEToGGSWKey<D> {
fn fill_uniform(&mut self, log_bound: usize, source: &mut Source) {
self.keys
.iter_mut()
.for_each(|key: &mut GGLWE<D>| key.fill_uniform(log_bound, source))
}
}
impl<D: HostDataRef> fmt::Display for GGLWEToGGSWKey<D> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
writeln!(f, "(GGLWEToGGSWKey)",)?;
for (i, key) in self.keys.iter().enumerate() {
write!(f, "{i}: {key}")?;
}
Ok(())
}
}
#[expect(
dead_code,
reason = "host-owned constructors are kept for serialization and host-only staging"
)]
impl GGLWEToGGSWKey<Vec<u8>> {
pub(crate) fn alloc_from_infos<A>(infos: &A) -> Self
where
A: GGLWEInfos,
{
assert_eq!(
infos.rank_in(),
infos.rank_out(),
"rank_in != rank_out is not supported for GGLWEToGGSWKey"
);
Self::alloc(
infos.n(),
infos.base2k(),
infos.max_k(),
infos.rank(),
infos.dnum(),
infos.dsize(),
)
}
pub(crate) fn alloc(n: Degree, base2k: Base2K, k: TorusPrecision, rank: Rank, dnum: Dnum, dsize: Dsize) -> Self {
GGLWEToGGSWKey {
keys: (0..rank.as_usize())
.map(|_| GGLWE::alloc(n, base2k, k, rank, rank, dnum, dsize))
.collect(),
}
}
pub fn bytes_of_from_infos<A>(infos: &A) -> usize
where
A: GGLWEInfos,
{
assert_eq!(
infos.rank_in(),
infos.rank_out(),
"rank_in != rank_out is not supported for GGLWEToGGSWKey"
);
Self::bytes_of(
infos.n(),
infos.base2k(),
infos.max_k(),
infos.rank(),
infos.dnum(),
infos.dsize(),
)
}
pub fn bytes_of(n: Degree, base2k: Base2K, k: TorusPrecision, rank: Rank, dnum: Dnum, dsize: Dsize) -> usize {
rank.as_usize() * GGLWE::bytes_of(n, base2k, k, rank, rank, dnum, dsize)
}
}
impl<D: HostDataMut> GGLWEToGGSWKey<D> {
pub fn at_mut(&mut self, i: usize) -> &mut GGLWE<D> {
assert!((i as u32) < self.rank());
&mut self.keys[i]
}
}
impl<D: HostDataRef> GGLWEToGGSWKey<D> {
pub fn at(&self, i: usize) -> &GGLWE<D> {
assert!((i as u32) < self.rank());
&self.keys[i]
}
}
impl<D: HostDataMut> ReaderFrom for GGLWEToGGSWKey<D> {
fn read_from<R: std::io::Read>(&mut self, reader: &mut R) -> std::io::Result<()> {
let len: usize = reader.read_u64::<LittleEndian>()? as usize;
if self.keys.len() != len {
return Err(std::io::Error::new(
std::io::ErrorKind::InvalidData,
format!("self.keys.len()={} != read len={}", self.keys.len(), len),
));
}
for key in &mut self.keys {
key.read_from(reader)?;
}
Ok(())
}
}
impl<D: HostDataRef> WriterTo for GGLWEToGGSWKey<D> {
fn write_to<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
writer.write_u64::<LittleEndian>(self.keys.len() as u64)?;
for key in &self.keys {
key.write_to(writer)?;
}
Ok(())
}
}
pub trait GGLWEToGGSWKeyToBackendRef<BE: Backend> {
fn to_backend_ref(&self) -> GGLWEToGGSWKeyBackendRef<'_, BE>;
}
impl<BE: Backend, D: Data> GGLWEToGGSWKeyToBackendRef<BE> for GGLWEToGGSWKey<D>
where
GGLWE<D>: GGLWEToBackendRef<BE>,
{
fn to_backend_ref(&self) -> GGLWEToGGSWKeyBackendRef<'_, BE> {
GGLWEToGGSWKeyBackendRef::from_inner(GGLWEToGGSWKey {
keys: self
.keys
.iter()
.map(|key| GGLWEToBackendRef::<BE>::to_backend_ref(key).into_inner())
.collect(),
})
}
}
pub trait GGLWEToGGSWKeyToBackendMut<BE: Backend>: GGLWEToGGSWKeyToBackendRef<BE> {
fn to_backend_mut(&mut self) -> GGLWEToGGSWKeyBackendMut<'_, BE>;
}
impl<BE: Backend, D: Data> GGLWEToGGSWKeyToBackendMut<BE> for GGLWEToGGSWKey<D>
where
GGLWE<D>: GGLWEToBackendMut<BE>,
{
fn to_backend_mut(&mut self) -> GGLWEToGGSWKeyBackendMut<'_, BE> {
GGLWEToGGSWKeyBackendMut::from_inner(GGLWEToGGSWKey {
keys: self
.keys
.iter_mut()
.map(|key| GGLWEToBackendMut::<BE>::to_backend_mut(key).into_inner())
.collect(),
})
}
}
impl<BE: Backend> GGLWEToGGSWKeyToBackendRef<BE> for &mut GGLWEToGGSWKey<BE::OwnedBuf> {
fn to_backend_ref(&self) -> GGLWEToGGSWKeyBackendRef<'_, BE> {
<GGLWEToGGSWKey<BE::OwnedBuf> as GGLWEToGGSWKeyToBackendRef<BE>>::to_backend_ref(self)
}
}
impl<BE: Backend> GGLWEToGGSWKeyToBackendMut<BE> for &mut GGLWEToGGSWKey<BE::OwnedBuf> {
fn to_backend_mut(&mut self) -> GGLWEToGGSWKeyBackendMut<'_, BE> {
<GGLWEToGGSWKey<BE::OwnedBuf> as GGLWEToGGSWKeyToBackendMut<BE>>::to_backend_mut(self)
}
}