Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Loaders/BasicFetchingItemsSorter.cpp @ 1852:5ead1852095a StoneWebViewer-2.1
StoneWebViewer-2.1
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 29 Jun 2021 16:26:47 +0200 |
parents | 9ac2a65d4172 |
children | 3889ae96d2e9 |
rev | line source |
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708 | 1 /** |
2 * Stone of Orthanc | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium |
708 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
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8 * modify it under the terms of the GNU Lesser General Public License |
708 | 9 * as published by the Free Software Foundation, either version 3 of |
10 * the License, or (at your option) any later version. | |
11 * | |
12 * This program is distributed in the hope that it will be useful, but | |
13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * Lesser General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
708 | 20 **/ |
21 | |
22 | |
23 #include "BasicFetchingItemsSorter.h" | |
24 | |
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25 #include <OrthancException.h> |
708 | 26 |
1628 | 27 #include <algorithm> |
1624 | 28 #include <cassert> |
29 | |
708 | 30 namespace OrthancStone |
31 { | |
32 BasicFetchingItemsSorter::BasicFetchingItemsSorter(unsigned int itemsCount) : | |
33 itemsCount_(itemsCount) | |
34 { | |
35 if (itemsCount == 0) | |
36 { | |
37 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
38 } | |
39 } | |
40 | |
41 | |
42 void BasicFetchingItemsSorter::Sort(std::vector<unsigned int>& target, | |
43 unsigned int current) | |
44 { | |
45 if (current >= itemsCount_) | |
46 { | |
47 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
48 } | |
49 | |
50 target.clear(); | |
51 target.reserve(itemsCount_); | |
52 target.push_back(current); | |
53 | |
54 const unsigned int countBelow = current; | |
55 const unsigned int countAbove = (itemsCount_ - 1) - current; | |
56 const unsigned int n = std::min(countBelow, countAbove); | |
57 | |
58 for (unsigned int i = 1; i <= n; i++) | |
59 { | |
60 assert(current + i < itemsCount_ && | |
61 current >= i); | |
62 target.push_back(current + i); | |
63 target.push_back(current - i); | |
64 } | |
65 | |
66 for (unsigned int i = current - n; i > 0; i--) | |
67 { | |
68 target.push_back(i - 1); | |
69 } | |
70 | |
71 for (unsigned int i = current + n + 1; i < itemsCount_; i++) | |
72 { | |
73 target.push_back(i); | |
74 } | |
75 | |
76 assert(target.size() == itemsCount_); | |
77 } | |
78 } |