postprocessor.h

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//
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// Copyright (C) 2026 by the ryujin authors
//
 
#pragma once
 
#include <ryujin/base/compile_time_options.h>
#include <ryujin/linear_algebra/state_vector.h>
 
#include <cstdint>
#include <string>
#include <utility>
#include <vector>
 
namespace ryujin
{
  namespace Interface
  {
    template <int dim, typename Number = double>
    class Postprocessor
    {
    public:
      virtual ~Postprocessor() = default;
 
      struct Selection {
        unsigned int size() const
        {
          return static_cast<unsigned int>(quantities.size());
        }
 
        std::vector<std::pair<std::uint8_t, unsigned int>> components;
 
        std::vector<std::pair<std::uint8_t, unsigned int>> quantities;
      };
 
      virtual Selection
      prepare(const std::vector<std::string> &selected) const = 0;
 
      virtual std::vector<ScalarHostVector<Number>>
      extract(const Selection &selection,
              const StateVector<Number> &state_vector) const = 0;
 
      virtual void extract(const Selection &selection,
                           const StateVector<Number> &state_vector,
                           const unsigned int *indices,
                           const unsigned int n_points,
                           Number *values) const = 0;
    };
  } // namespace Interface
} // namespace ryujin