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#ifndef SCIQLOP_DATASERIESMERGEHELPER_H
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#define SCIQLOP_DATASERIESMERGEHELPER_H
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template <int Dim>
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class DataSeries;
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namespace detail {
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/**
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* Scope that can be used for a merge operation
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* @tparam FEnd the type of function that will be executed at the end of the scope
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*/
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template <typename FEnd>
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struct MergeScope {
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explicit MergeScope(FEnd end) : m_End{end} {}
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virtual ~MergeScope() noexcept { m_End(); }
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FEnd m_End;
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};
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/**
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* Creates a scope for merge operation
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* @tparam end the function executed at the end of the scope
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*/
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template <typename FEnd>
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MergeScope<FEnd> scope(FEnd end)
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{
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return MergeScope<FEnd>{end};
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}
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} // namespace detail
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/// Helper used to merge two DataSeries
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/// @sa DataSeries
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struct DataSeriesMergeHelper {
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/// Merges the source data series into the dest data series. Data of the source data series are
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/// consumed
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template <int Dim>
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static void merge(DataSeries<Dim> &source, DataSeries<Dim> &dest)
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{
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// Creates a scope to clear source data series at the end of the merge
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auto _ = detail::scope([&source]() { source.clear(); });
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// Case : source data series is empty -> no merge is made
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if (source.isEmpty()) {
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return;
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}
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// Case : dest data series is empty -> we simply swap the data
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if (dest.isEmpty()) {
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std::swap(dest.m_XAxisData, source.m_XAxisData);
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std::swap(dest.m_ValuesData, source.m_ValuesData);
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return;
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}
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auto destMin = dest.cbegin()->x();
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auto destMax = (--dest.cend())->x();
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auto sourceBegin = source.cbegin();
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auto sourceEnd = source.cend();
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auto sourceMin = sourceBegin->x();
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auto sourceMax = (--source.cend())->x();
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// Case : source bounds are inside dest bounds -> no merge is made
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if (sourceMin >= destMin && sourceMax <= destMax) {
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return;
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}
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// Default case :
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// - prepend to dest the values of source that are lower than min value of dest
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// - append to dest the values of source that are greater than max value of dest
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auto lowerIt
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= std::lower_bound(sourceBegin, sourceEnd, destMin,
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[](const auto &it, const auto &val) { return it.x() < val; });
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auto upperIt
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= std::upper_bound(lowerIt, sourceEnd, destMax,
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[](const auto &val, const auto &it) { return val < it.x(); });
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dest.insert(sourceBegin, lowerIt, true);
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dest.insert(upperIt, sourceEnd);
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}
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};
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#endif // SCIQLOP_DATASERIESMERGEHELPER_H
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