Alexandria
2.31.0
SDC-CH common library for the Euclid project
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NdArray
src
Operations.cpp
Go to the documentation of this file.
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/*
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* Copyright (C) 2012-2021 Euclid Science Ground Segment
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*
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* This library is free software; you can redistribute it and/or modify it under
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* the terms of the GNU Lesser General Public License as published by the Free
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* Software Foundation; either version 3.0 of the License, or (at your option)
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* any later version.
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*
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* This library is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "
NdArray/Operations.h
"
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namespace
Euclid
{
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namespace
NdArray {
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std::vector<std::size_t>
unravel_index
(
std::size_t
index,
const
std::vector<std::size_t>
& shape) {
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std::vector<std::size_t>
coords(shape.
size
());
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std::size_t
i = coords.
size
();
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do
{
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--i;
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std::size_t
stride = shape[i];
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coords[i] = index % stride;
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index /= stride;
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}
while
(i > 0);
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if
(index > 0) {
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throw
std::out_of_range
(
"Index out of bounds"
);
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}
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return
coords;
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}
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}
// namespace NdArray
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}
// namespace Euclid
Operations.h
Euclid::NdArray::unravel_index
std::vector< std::size_t > unravel_index(std::size_t index, const std::vector< std::size_t > &shape)
Definition
Operations.cpp:24
Euclid
Definition
index_sequence.h:27
std::out_of_range
std::vector::size
T size(T... args)
std::size_t
std::vector
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