forked from M-Labs/nac3
core/ndstrides: add NDArray with strides definition
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#pragma once
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namespace {
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/**
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* @brief The NDArray object
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*
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* The official numpy implementations: https://github.com/numpy/numpy/blob/735a477f0bc2b5b84d0e72d92f224bde78d4e069/doc/source/reference/c-api/types-and-structures.rst
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*/
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template <typename SizeT>
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struct NDArray {
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/**
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* @brief The underlying data this `ndarray` is pointing to.
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*
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* Must be set to `nullptr` to indicate that this NDArray's `data` is uninitialized.
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*/
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uint8_t* data;
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/**
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* @brief The number of bytes of a single element in `data`.
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*/
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SizeT itemsize;
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/**
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* @brief The number of dimensions of this shape.
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*/
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SizeT ndims;
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/**
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* @brief The NDArray shape, with length equal to `ndims`.
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*
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* Note that it may contain 0.
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*/
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SizeT* shape;
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/**
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* @brief Array strides, with length equal to `ndims`
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*
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* The stride values are in units of bytes, not number of elements.
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*
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* Note that `strides` can have negative values.
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*/
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SizeT* strides;
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};
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} // namespace
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@ -3,4 +3,5 @@
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#include <irrt/core.hpp>
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#include <irrt/exception.hpp>
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#include <irrt/int_defs.hpp>
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#include <irrt/ndarray/def.hpp>
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#include <irrt/util.hpp>
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@ -1,2 +1,3 @@
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pub mod cslice;
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pub mod exception;
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pub mod ndarray;
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@ -0,0 +1,34 @@
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use crate::codegen::*;
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pub struct NpArrayFields<'ctx, F: FieldTraversal<'ctx>> {
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pub data: F::Out<PtrModel<IntModel<Byte>>>,
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pub itemsize: F::Out<IntModel<SizeT>>,
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pub ndims: F::Out<IntModel<SizeT>>,
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pub shape: F::Out<PtrModel<IntModel<SizeT>>>,
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pub strides: F::Out<PtrModel<IntModel<SizeT>>>,
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}
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// TODO: Rename to `NDArray` when the old NDArray is removed.
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#[derive(Debug, Clone, Copy, Default)]
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pub struct NpArray;
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impl<'ctx> StructKind<'ctx> for NpArray {
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type Fields<F: FieldTraversal<'ctx>> = NpArrayFields<'ctx, F>;
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fn traverse_fields<F: FieldTraversal<'ctx>>(&self, traversal: &mut F) -> Self::Fields<F> {
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Self::Fields {
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data: traversal.add_auto("data"),
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itemsize: traversal.add_auto("itemsize"),
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ndims: traversal.add_auto("ndims"),
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shape: traversal.add_auto("shape"),
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strides: traversal.add_auto("strides"),
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}
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}
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}
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#[derive(Debug, Clone, Copy)]
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pub struct NDArrayObject<'ctx> {
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pub dtype: Type,
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pub ndims: Type,
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pub value: Ptr<'ctx, StructModel<NpArray>>,
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}
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