generic.hpp

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// Copyright (c) 2019-2024 Simons Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0.txt
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Authors: Thomas Hahn, Olivier Parcollet, Nils Wentzell

 
#ifndef LIBH5_GENERIC_HPP
#define LIBH5_GENERIC_HPP
 
#include "./group.hpp"
 
#include <string>
#include <type_traits>
 
namespace h5 {


  template <typename T>
  T h5_read(group g, std::string const &key) {
    // default constructible
    if constexpr (std::is_default_constructible_v<T>) {
      T x{};
      h5_read(g, key, x);
      return x;
    } else { // not default constructible
      return T::h5_read_construct(g, key);
    }
  }

  template <typename T>
  T read(group g, std::string const &key) {
    return h5_read<T>(g, key);
  }

  template <typename T>
  void read(group g, std::string const &key, T &x, auto const &...args) {
    h5_read(g, key, x, args...);
  }

  template <typename T>
  void write(group g, std::string const &key, T const &x, auto const &...args) {
    h5_write(g, key, x, args...);
  }

  template <typename T>
  T h5_read_attribute(object obj, std::string const &name) {
    T x;
    h5_read_attribute(obj, name, x);
    return x;
  }

  template <typename T>
  T read_attribute(object obj, std::string const &key) {
    return h5_read_attribute<T>(obj, key);
  }

  template <typename T>
  void read_attribute(object obj, std::string const &key, T &x) {
    h5_read_attribute(obj, key, x);
  }

  template <typename T>
  void write_attribute(object obj, std::string const &key, T const &x) {
    h5_write_attribute(obj, key, x);
  }

  template <typename T>
  T h5_read_attribute_from_key(group g, std::string const &key, std::string const &name) {
    T x;
    h5_read_attribute_from_key(g, key, name, x);
    return x;
  }

  template <typename T>
  inline bool try_read(group g, std::string const &key, T &x) {
    if (g.has_key(key)) {
      h5_read(g, key, x);
      return true;
    }
    return false;
  }

 
} // namespace h5
 
#endif // LIBH5_GENERIC_HPP