poet/include/highfive/bits/H5Utils.hpp

78 lines
2.2 KiB
C++

/*
* Copyright (c), 2017, Adrien Devresse <adrien.devresse@epfl.ch>
*
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
*
*/
#pragma once
// internal utilities functions
#include <algorithm>
#include <array>
#include <cstddef> // __GLIBCXX__
#include <exception>
#include <string>
#include <type_traits>
#include <vector>
#include <sstream>
#include <H5public.h>
#include "../H5Exception.hpp"
#include "H5Friends.hpp"
namespace HighFive {
namespace details {
// converter function for hsize_t -> size_t when hsize_t != size_t
template <typename Size>
inline std::vector<std::size_t> to_vector_size_t(const std::vector<Size>& vec) {
static_assert(!std::is_same<Size, std::size_t>::value, " hsize_t != size_t mandatory here");
std::vector<size_t> res(vec.size());
std::transform(vec.cbegin(), vec.cend(), res.begin(), [](Size e) {
return static_cast<size_t>(e);
});
return res;
}
// converter function for hsize_t -> size_t when size_t == hsize_t
inline std::vector<std::size_t> to_vector_size_t(const std::vector<std::size_t>& vec) {
return vec;
}
// read name from a H5 object using the specified function
template <typename T>
inline std::string get_name(T fct) {
constexpr size_t maxLength = 255;
std::array<char, maxLength + 1> buffer;
ssize_t retcode = fct(buffer.data(), static_cast<hsize_t>(buffer.size()));
if (retcode < 0) {
HDF5ErrMapper::ToException<GroupException>("Error accessing object name");
}
const size_t length = static_cast<std::size_t>(retcode);
if (length <= maxLength) {
return std::string(buffer.data(), length);
}
std::vector<char> bigBuffer(length + 1, 0);
fct(bigBuffer.data(), length + 1);
return std::string(bigBuffer.data(), length);
}
template <class Container>
inline std::string format_vector(const Container& container) {
auto sout = std::stringstream{};
sout << "[ ";
for (size_t i = 0; i < container.size(); ++i) {
sout << container[i] << (i == container.size() - 1 ? "" : ", ");
}
sout << "]";
return sout.str();
}
} // namespace details
} // namespace HighFive