/usr/include/dune/grid/utility/multiindex.hh is in libdune-grid-dev 2.5.1-1.
This file is owned by root:root, with mode 0o644.
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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 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | #ifndef DUNE_GRID_UTILITY_MULTIINDEX_HH
#define DUNE_GRID_UTILITY_MULTIINDEX_HH
/** \file
* \brief Implements a multiindex with arbitrary dimension and fixed index ranges
* This is used by various factory classes.
*/
#include<array>
namespace Dune
{
namespace FactoryUtilities
{
template<std::size_t dim>
class MultiIndex : public std::array<unsigned int,dim>
{
// The range of each component
std::array<unsigned int,dim> limits_;
public:
/** \brief Constructor with a given range for each digit */
MultiIndex(const std::array<unsigned int,dim>& limits) : limits_(limits)
{
std::fill(this->begin(), this->end(), 0);
}
/** \brief Increment the MultiIndex */
MultiIndex<dim>& operator++()
{
for (std::size_t i=0; i<dim; i++)
{
// Augment digit
(*this)[i]++;
// If there is no carry-over we can stop here
if ((*this)[i]<limits_[i])
break;
(*this)[i] = 0;
}
return *this;
}
/** \brief Compute how many times you can call operator++ before getting to (0,...,0) again */
size_t cycle() const
{
size_t result = 1;
for (std::size_t i=0; i<dim; i++)
result *= limits_[i];
return result;
}
};
}
}
#endif
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