read_write_dataset_string.cpp

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/*
 *  Copyright (c), 2017, Adrien Devresse
 *
 *  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)
 *
 */
#include <iostream>
#include <string>
#include <vector>
 
#include <highfive/H5File.hpp>
#include <highfive/H5DataSet.hpp>
#include <highfive/H5DataSpace.hpp>
 
using namespace HighFive;
 
const std::string FILE_NAME("create_dataset_string_example.h5");
const std::string DATASET_NAME("story");
 
// create a dataset from a vector of string
// read it back and print it
int main(void) {
 
    try {
        // Create a new file using the default property lists.
        File file(FILE_NAME, File::ReadWrite | File::Create | File::Truncate);
 
        std::vector<std::string> string_list;
        string_list.push_back("Hello World !");
        string_list.push_back("This string list is mapped to a dataset of "
                              "variable length string");
        string_list.push_back(
            "Encoding is done in UTF-8 - 你好 - Здравствуйте!");
        string_list.push_back("May the force be with you");
        string_list.push_back("Enjoy !");
 
        // create a dataset ready to contains strings of the size of the vector
        // string_list
        DataSet dataset = file.createDataSet<std::string>(
            DATASET_NAME, DataSpace::From(string_list));
 
        // let's write our vector of  string
        dataset.write(string_list);
 
        // now we read it back
        std::vector<std::string> result_string_list;
        dataset.read(result_string_list);
 
        for (size_t i = 0; i < result_string_list.size(); ++i) {
            std::cout << ":" << i << " " << result_string_list[i] << "\n";
        }
 
    } catch (Exception& err) {
        // catch and print any HDF5 error
        std::cerr << err.what() << std::endl;
    }
 
    return 0; // successfully terminated
}