Add unsafe slice construction.
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@ -23,6 +23,15 @@ use core::matrix_slice::{SliceStorage, SliceStorageMut};
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*
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*/
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impl<'a, N: Scalar, R: Dim, C: Dim, RStride: Dim, CStride: Dim> MatrixSliceMN<'a, N, R, C, RStride, CStride> {
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#[inline]
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pub unsafe fn new_slice_with_strides_generic_unchecked(
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data: &'a [N], start: usize, nrows: R, ncols: C, rstride: RStride, cstride: CStride) -> Self {
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let data = unsafe {
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SliceStorage::from_raw_parts(data.as_ptr().offset(start as isize), (nrows, ncols), (rstride, cstride))
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};
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Self::from_data(data)
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}
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#[inline]
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pub fn new_slice_with_strides_generic(data: &'a [N], nrows: R, ncols: C, rstride: RStride, cstride: CStride) -> Self {
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// NOTE: The assertion implements the following formula, but without subtractions to avoid
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@ -32,14 +41,22 @@ impl<'a, N: Scalar, R: Dim, C: Dim, RStride: Dim, CStride: Dim> MatrixSliceMN<'a
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ncols.value() * cstride.value() + nrows.value() * rstride.value() + 1,
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"Matrix slice: input data buffer to small.");
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let data = unsafe {
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SliceStorage::from_raw_parts(data.as_ptr(), (nrows, ncols), (rstride, cstride))
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};
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Self::from_data(data)
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unsafe {
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Self::new_slice_with_strides_generic_unchecked(data, 0, nrows, ncols, rstride, cstride)
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}
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}
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}
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impl<'a, N: Scalar, R: Dim, C: Dim, RStride: Dim, CStride: Dim> MatrixSliceMutMN<'a, N, R, C, RStride, CStride> {
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#[inline]
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pub unsafe fn new_slice_with_strides_mut_generic_unchecked(
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data: &'a mut [N], start: usize, nrows: R, ncols: C, rstride: RStride, cstride: CStride) -> Self {
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let data = unsafe {
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SliceStorageMut::from_raw_parts(data.as_mut_ptr().offset(start as isize), (nrows, ncols), (rstride, cstride))
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};
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Self::from_data(data)
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}
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#[inline]
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pub fn new_slice_with_strides_mut_generic(data: &'a mut [N], nrows: R, ncols: C, rstride: RStride, cstride: CStride) -> Self {
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// NOTE: The assertion implements the following formula, but without subtractions to avoid
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@ -49,14 +66,18 @@ impl<'a, N: Scalar, R: Dim, C: Dim, RStride: Dim, CStride: Dim> MatrixSliceMutMN
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ncols.value() * cstride.value() + nrows.value() * rstride.value() + 1,
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"Matrix slice: input data buffer to small.");
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let data = unsafe {
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SliceStorageMut::from_raw_parts(data.as_mut_ptr(), (nrows, ncols), (rstride, cstride))
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};
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Self::from_data(data)
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unsafe {
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Self::new_slice_with_strides_mut_generic_unchecked(data, 0, nrows, ncols, rstride, cstride)
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}
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}
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}
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impl<'a, N: Scalar, R: Dim, C: Dim> MatrixSliceMN<'a, N, R, C> {
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#[inline]
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pub unsafe fn new_slice_generic_unchecked(data: &'a [N], start: usize, nrows: R, ncols: C) -> Self {
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Self::new_slice_with_strides_generic_unchecked(data, start, nrows, ncols, U1, nrows)
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}
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#[inline]
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pub fn new_slice_generic(data: &'a [N], nrows: R, ncols: C) -> Self {
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Self::new_slice_with_strides_generic(data, nrows, ncols, U1, nrows)
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@ -64,6 +85,11 @@ impl<'a, N: Scalar, R: Dim, C: Dim> MatrixSliceMN<'a, N, R, C> {
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}
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impl<'a, N: Scalar, R: Dim, C: Dim> MatrixSliceMutMN<'a, N, R, C> {
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#[inline]
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pub unsafe fn new_slice_mut_generic_unchecked(data: &'a mut [N], start: usize, nrows: R, ncols: C) -> Self {
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Self::new_slice_with_strides_mut_generic_unchecked(data, start, nrows, ncols, U1, nrows)
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}
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#[inline]
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pub fn new_slice_mut_generic(data: &'a mut [N], nrows: R, ncols: C) -> Self {
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Self::new_slice_with_strides_mut_generic(data, nrows, ncols, U1, nrows)
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@ -77,6 +103,11 @@ macro_rules! impl_constructors(
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pub fn new(data: &'a [N], $($args: usize),*) -> Self {
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Self::new_slice_generic(data, $($gargs),*)
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}
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#[inline]
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pub unsafe fn new_unchecked(data: &'a [N], start: usize, $($args: usize),*) -> Self {
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Self::new_slice_generic_unchecked(data, start, $($gargs),*)
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}
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}
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impl<'a, N: Scalar, $($DimIdent: $DimBound, )*> MatrixSliceMN<'a, N, $($Dims,)* Dynamic, Dynamic> {
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@ -84,6 +115,11 @@ macro_rules! impl_constructors(
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pub fn new_with_strides(data: &'a [N], $($args: usize,)* rstride: usize, cstride: usize) -> Self {
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Self::new_slice_with_strides_generic(data, $($gargs,)* Dynamic::new(rstride), Dynamic::new(cstride))
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}
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#[inline]
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pub unsafe fn new_with_strides_unchecked(data: &'a [N], start: usize, $($args: usize,)* rstride: usize, cstride: usize) -> Self {
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Self::new_slice_with_strides_generic_unchecked(data, start, $($gargs,)* Dynamic::new(rstride), Dynamic::new(cstride))
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}
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}
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}
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);
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@ -118,6 +154,11 @@ macro_rules! impl_constructors_mut(
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pub fn new(data: &'a mut [N], $($args: usize),*) -> Self {
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Self::new_slice_mut_generic(data, $($gargs),*)
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}
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#[inline]
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pub unsafe fn new_unchecked(data: &'a mut [N], start: usize, $($args: usize),*) -> Self {
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Self::new_slice_mut_generic_unchecked(data, start, $($gargs),*)
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}
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}
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impl<'a, N: Scalar, $($DimIdent: $DimBound, )*> MatrixSliceMutMN<'a, N, $($Dims,)* Dynamic, Dynamic> {
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@ -126,6 +167,12 @@ macro_rules! impl_constructors_mut(
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Self::new_slice_with_strides_mut_generic(
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data, $($gargs,)* Dynamic::new(rstride), Dynamic::new(cstride))
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}
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#[inline]
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pub unsafe fn new_with_strides_unchecked(data: &'a mut [N], start: usize, $($args: usize,)* rstride: usize, cstride: usize) -> Self {
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Self::new_slice_with_strides_mut_generic_unchecked(
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data, start, $($gargs,)* Dynamic::new(rstride), Dynamic::new(cstride))
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}
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}
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}
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);
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