Danny Robson
1ad3e0bde0
sort::soa applies a permutation to multiple value arrays such that the first value array is sorted
50 lines
1.9 KiB
C++
50 lines
1.9 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright:
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* 2017, Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef CRUFT_UTIL_ALGO_SORT_HPP
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#define CRUFT_UTIL_ALGO_SORT_HPP
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namespace cruft::util::sort {
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///////////////////////////////////////////////////////////////////////////
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// rearrange the values in the arrays specified by the iterators value and
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// ...tail by moving values to the positions described by the mapping of
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// offset-to-dest_index in idx_first:idx_last.
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//
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// ie, the indices { 2, 1, 0 } will reverse a series of arrays of three
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// elements
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//
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// all operations occur in-place, and the indices may be rearranged during
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// the operation.
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template <typename IndexIt, typename ValueIt, typename ...OtherIt>
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void
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reorder (IndexIt idx_first, IndexIt idx_last, ValueIt value, OtherIt ...tail);
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///////////////////////////////////////////////////////////////////////////
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// sort an array specified by the iterators key_first:key_last using a
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// comparator, and optionally a series of additional value iterators
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// specified by ...values.
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//
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// sorting is performed in-place and will invariably allocate memory.
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template <typename RandomIt, class Comparator, class ...Args>
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void
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soa (RandomIt key_first, RandomIt key_last, Comparator comp, Args ...values);
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}
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#include "./sort.ipp"
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#endif
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