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
|
// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
// $Id: reverse.hh 942 2008-09-10 18:21:57Z christi $
#ifndef REVERSE_HH
#define REVERSE_HH
#include "buildindexset.hh"
/**
* @brief Reverse the local indices of an index set.
*
* Let the index set have N entries than the index 0 will become N-1,
* 1 become N-2, ..., and N-1 will become 0.
* @param indexSet The index set to reverse.
*/
template<typename TG, typename TL, int N>
void reverseLocalIndex(Dune::ParallelIndexSet<TG,TL,N>& indexSet)
{
// reverse the local indices
typedef typename Dune::ParallelIndexSet<TG,TL,N>::iterator iterator;
iterator end = indexSet.end();
size_t maxLocal = 0;
// find the maximal local index
for(iterator index = indexSet.begin(); index != end; ++index) {
// Get the local index
LocalIndex& local = index->local();
maxLocal = std::max(maxLocal, local.local());
}
for(iterator index = indexSet.begin(); index != end; ++index) {
// Get the local index
LocalIndex& local = index->local();
local = maxLocal--;
}
}
#endif
|