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use crate::{error::*, layout::MatrixLayout, *};
use cauchy::*;
use num_traits::{ToPrimitive, Zero};
pub struct BkWork<T: Scalar> {
pub layout: MatrixLayout,
pub work: Vec<MaybeUninit<T>>,
pub ipiv: Vec<MaybeUninit<i32>>,
}
pub trait BkWorkImpl: Sized {
type Elem: Scalar;
fn new(l: MatrixLayout) -> Result<Self>;
fn calc(&mut self, uplo: UPLO, a: &mut [Self::Elem]) -> Result<&[i32]>;
fn eval(self, uplo: UPLO, a: &mut [Self::Elem]) -> Result<Pivot>;
}
macro_rules! impl_bk_work {
($s:ty, $trf:path) => {
impl BkWorkImpl for BkWork<$s> {
type Elem = $s;
fn new(layout: MatrixLayout) -> Result<Self> {
let (n, _) = layout.size();
let ipiv = vec_uninit(n as usize);
let mut info = 0;
let mut work_size = [Self::Elem::zero()];
unsafe {
$trf(
UPLO::Upper.as_ptr(),
&n,
std::ptr::null_mut(),
&layout.lda(),
std::ptr::null_mut(),
AsPtr::as_mut_ptr(&mut work_size),
&(-1),
&mut info,
)
};
info.as_lapack_result()?;
let lwork = work_size[0].to_usize().unwrap();
let work = vec_uninit(lwork);
Ok(BkWork { layout, work, ipiv })
}
fn calc(&mut self, uplo: UPLO, a: &mut [Self::Elem]) -> Result<&[i32]> {
let (n, _) = self.layout.size();
let lwork = self.work.len().to_i32().unwrap();
if lwork == 0 {
return Ok(&[]);
}
let mut info = 0;
unsafe {
$trf(
uplo.as_ptr(),
&n,
AsPtr::as_mut_ptr(a),
&self.layout.lda(),
AsPtr::as_mut_ptr(&mut self.ipiv),
AsPtr::as_mut_ptr(&mut self.work),
&lwork,
&mut info,
)
};
info.as_lapack_result()?;
Ok(unsafe { self.ipiv.slice_assume_init_ref() })
}
fn eval(mut self, uplo: UPLO, a: &mut [Self::Elem]) -> Result<Pivot> {
let _ref = self.calc(uplo, a)?;
Ok(unsafe { self.ipiv.assume_init() })
}
}
};
}
impl_bk_work!(c64, lapack_sys::zhetrf_);
impl_bk_work!(c32, lapack_sys::chetrf_);
impl_bk_work!(f64, lapack_sys::dsytrf_);
impl_bk_work!(f32, lapack_sys::ssytrf_);
pub struct InvhWork<T: Scalar> {
pub layout: MatrixLayout,
pub work: Vec<MaybeUninit<T>>,
}
pub trait InvhWorkImpl: Sized {
type Elem;
fn new(layout: MatrixLayout) -> Result<Self>;
fn calc(&mut self, uplo: UPLO, a: &mut [Self::Elem], ipiv: &Pivot) -> Result<()>;
}
macro_rules! impl_invh_work {
($s:ty, $tri:path) => {
impl InvhWorkImpl for InvhWork<$s> {
type Elem = $s;
fn new(layout: MatrixLayout) -> Result<Self> {
let (n, _) = layout.size();
let work = vec_uninit(n as usize);
Ok(InvhWork { layout, work })
}
fn calc(&mut self, uplo: UPLO, a: &mut [Self::Elem], ipiv: &Pivot) -> Result<()> {
let (n, _) = self.layout.size();
let mut info = 0;
unsafe {
$tri(
uplo.as_ptr(),
&n,
AsPtr::as_mut_ptr(a),
&self.layout.lda(),
ipiv.as_ptr(),
AsPtr::as_mut_ptr(&mut self.work),
&mut info,
)
};
info.as_lapack_result()?;
Ok(())
}
}
};
}
impl_invh_work!(c64, lapack_sys::zhetri_);
impl_invh_work!(c32, lapack_sys::chetri_);
impl_invh_work!(f64, lapack_sys::dsytri_);
impl_invh_work!(f32, lapack_sys::ssytri_);
pub trait SolvehImpl: Scalar {
fn solveh(l: MatrixLayout, uplo: UPLO, a: &[Self], ipiv: &Pivot, b: &mut [Self]) -> Result<()>;
}
macro_rules! impl_solveh_ {
($s:ty, $trs:path) => {
impl SolvehImpl for $s {
fn solveh(
l: MatrixLayout,
uplo: UPLO,
a: &[Self],
ipiv: &Pivot,
b: &mut [Self],
) -> Result<()> {
let (n, _) = l.size();
let mut info = 0;
unsafe {
$trs(
uplo.as_ptr(),
&n,
&1,
AsPtr::as_ptr(a),
&l.lda(),
ipiv.as_ptr(),
AsPtr::as_mut_ptr(b),
&n,
&mut info,
)
};
info.as_lapack_result()?;
Ok(())
}
}
};
}
impl_solveh_!(c64, lapack_sys::zhetrs_);
impl_solveh_!(c32, lapack_sys::chetrs_);
impl_solveh_!(f64, lapack_sys::dsytrs_);
impl_solveh_!(f32, lapack_sys::ssytrs_);
