Alexandria 2.31.0
SDC-CH common library for the Euclid project
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Operations.cpp
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1/*
2 * Copyright (C) 2012-2021 Euclid Science Ground Segment
3 *
4 * This library is free software; you can redistribute it and/or modify it under
5 * the terms of the GNU Lesser General Public License as published by the Free
6 * Software Foundation; either version 3.0 of the License, or (at your option)
7 * any later version.
8 *
9 * This library is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12 * details.
13 *
14 * You should have received a copy of the GNU Lesser General Public License
15 * along with this library; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19#include "NdArray/Operations.h"
20
21namespace Euclid {
22namespace NdArray {
23
25 std::vector<std::size_t> coords(shape.size());
26 std::size_t i = coords.size();
27 do {
28 --i;
29 std::size_t stride = shape[i];
30 coords[i] = index % stride;
31 index /= stride;
32 } while (i > 0);
33 if (index > 0) {
34 throw std::out_of_range("Index out of bounds");
35 }
36 return coords;
37}
38
39} // namespace NdArray
40} // namespace Euclid
std::vector< std::size_t > unravel_index(std::size_t index, const std::vector< std::size_t > &shape)
T size(T... args)