1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/*
* N-dimensional strided array
* Copyright 2018-2020 Anton Khirnov <anton@khirnov.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef NDARRAY_NDARRAY_H
#define NDARRAY_NDARRAY_H
#include <stddef.h>
#include <stdint.h>
/**
* TODO:
* custom allocators
* destructors
* other data types than double
*/
typedef struct NDASlice {
ptrdiff_t start;
ptrdiff_t end;
ptrdiff_t step;
} NDASlice;
#define NDASLICE(start, end, step) ((NDASlice){ start, end, step })
#define NDASLICE_NULL ((NDASlice){ PTRDIFF_MAX })
typedef struct NDArrayInternal NDArrayInternal;
typedef struct NDArray {
NDArrayInternal *priv;
unsigned int dims;
double *data;
const size_t *shape;
const ptrdiff_t *stride;
} NDArray;
#define NDA_IDX1D(arr, x) ((arr)->stride[0] * (x))
#define NDA_IDX2D(arr, x, y) ((arr)->stride[0] * (y) + (arr)->stride[1] * (x))
#define NDA_IDX3D(arr, x, y, z) ((arr)->stride[0] * (z) + (arr)->stride[1] * (y) + (arr)->stride[0] * (x))
#define NDA_PTR1D(arr, x) ((arr)->data + NDA_IDX1D(arr, x))
#define NDA_PTR2D(arr, x, y) ((arr)->data + NDA_IDX2D(arr, x, y))
#define NDA_PTR3D(arr, x, y, z) ((arr)->data + NDA_IDX2D(arr, x, y, z))
#define NDARRAY_ALLOC_ZERO (1 << 0)
int ndarray_alloc(NDArray **arr, unsigned int dims,
const size_t * const size, unsigned int flags);
void ndarray_free(NDArray **arr);
int ndarray_wrap(NDArray **arr, unsigned int dims,
const size_t * const size, double *data,
const ptrdiff_t * const strides);
int ndarray_slice(NDArray **dst, NDArray *src,
const NDASlice * const slice);
int ndarray_copy(NDArray *dst, const NDArray *src);
#endif // NDARRAY_NDARRAY_H
|
