item_struct.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#pragma once
 
#include <map>
#include <string>
 
template <typename T>
// cppcheck-suppress noConstructor
class item_struct {
public:
  struct item_t {
    const T *value;   
    bool det_average; 
    const int *dim0;  
    const int *dim1;  
    item_t(const T *v, bool da, const int *d0, const int *d1) : value(v), det_average(da), dim0(d0), dim1(d1) {}
  };
 
  item_struct() : m_items(), m_spec_array(nullptr), m_ndet(0){};
 
private:
  using items_map_t = std::map<std::string,
                               item_t>; 
  items_map_t m_items;                  
  unsigned long *m_spec_array;          
  long m_ndet; 
public:
  int addItem(const std::string &name, const T *value, bool det_average = false, const int *dim0 = nullptr,
              const int *dim1 = nullptr) {
    std::pair<typename items_map_t::iterator, bool> insert_ret;
    insert_ret = m_items.insert(typename items_map_t::value_type(name, item_t(value, det_average, dim0, dim1)));
    if (!insert_ret.second) {
      return -1; // duplicate
    } else {
      return 0;
    }
  }
 
  const item_t *findItem(const std::string &item_name, bool det_average) {
    typename items_map_t::const_iterator iter;
    iter = m_items.find(item_name);
    if ((iter != m_items.end()) && (iter->second.det_average == det_average)) {
      return &(iter->second);
    } else {
      return NULL;
    }
  }
 
  int getItem(const std::string &item_name, T &value);
  int getItem(const std::string &item_name, const long *spec_array, int nspec, T *lVal);
  int getArrayItemSize(const std::string &item_name, int *dims_array, int &ndims);
  int getArrayItem(const std::string &item_name, int nspec, T *larray);
  int getArrayItem(const std::string &item_name, T *larray);
};