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
|
/*
* N-dimensional strided array
* Copyright 2018 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 MG2D_NDARRAY_H
#define MG2D_NDARRAY_H
#include <stddef.h>
#include <stdint.h>
typedef struct Slice {
ptrdiff_t start;
ptrdiff_t end;
size_t step;
} Slice;
#define SLICE(start, end, step) ((Slice){ start, end, step })
#define SLICE_NULL ((Slice){ 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 NDARRAY_ALLOC_ZERO (1 << 0)
#define NDIDX1D(arr, x) (arr->stride[0] * x)
#define NDIDX2D(arr, x, y) (arr->stride[0] * y + arr->stride[1] * x)
#define NDIDX3D(arr, x, y, z) (arr->stride[0] * z + arr->stride[1] * y + arr->stride[0] * x)
#define NDPTR1D(arr, x) (arr->data + NDIDX1D(arr, x))
#define NDPTR2D(arr, x, y) (arr->data + NDIDX2D(arr, x, y))
#define NDPTR3D(arr, x, y, z) (arr->data + NDIDX2D(arr, x, y, z))
int mg2di_ndarray_alloc(NDArray **result, unsigned int dims,
const size_t * const size, unsigned int flags);
void mg2di_ndarray_free(NDArray **a);
int mg2di_ndarray_slice(NDArray **result, NDArray *src,
const Slice * const slice);
int mg2di_ndarray_copy(NDArray *dst, const NDArray *src);
#endif // MG2D_ARRAY_H
|