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|---|---|---|---|
| 1 | // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- | ||
| 2 | // vi: set et ts=4 sw=4 sts=4: | ||
| 3 | // | ||
| 4 | // SPDX-FileCopyrightText: Copyright © DuMux Project contributors, see AUTHORS.md in root folder | ||
| 5 | // SPDX-License-Identifier: GPL-3.0-or-later | ||
| 6 | // | ||
| 7 | /*! | ||
| 8 | * \file | ||
| 9 | * \ingroup InputOutput | ||
| 10 | * \brief Free functions to write and read a sequence container to and from a file | ||
| 11 | * \note Reading should work for all sequence containers providing begin, end, and push_back | ||
| 12 | * (e.g. std::vector, std::deque, std::list), so not for e.g. std::array. | ||
| 13 | * Writing only needs begin and end member functions returning iterators. | ||
| 14 | */ | ||
| 15 | #ifndef DUMUX_IO_CONTAINER_HH | ||
| 16 | #define DUMUX_IO_CONTAINER_HH | ||
| 17 | |||
| 18 | #include <iostream> | ||
| 19 | #include <ios> | ||
| 20 | #include <iomanip> | ||
| 21 | #include <fstream> | ||
| 22 | #include <iterator> | ||
| 23 | |||
| 24 | #include <dune/common/exceptions.hh> | ||
| 25 | |||
| 26 | namespace Dumux { | ||
| 27 | |||
| 28 | /*! | ||
| 29 | * \ingroup InputOutput | ||
| 30 | * \brief Writes a container to file | ||
| 31 | * \param v The container, requires begin() and end() method | ||
| 32 | * \param filename The filename to write to | ||
| 33 | * \param floatPrecision The total number of digits stored, including decimal | ||
| 34 | * | ||
| 35 | * usage: std::vector<double> v(5, 0.0); writeContainerToFile(v, "myvector.txt"); | ||
| 36 | */ | ||
| 37 | template<typename Container> | ||
| 38 | 152 | void writeContainerToFile(const Container& v, | |
| 39 | const std::string& filename, | ||
| 40 | int floatPrecision = 6) | ||
| 41 | { | ||
| 42 | 152 | std::ofstream outfile(filename, std::ios::out); | |
| 43 |
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152 | outfile << std::scientific << std::setprecision(floatPrecision); |
| 44 |
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152 | std::ostream_iterator<typename Container::value_type> it(outfile, "\n"); |
| 45 |
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152 | std::copy(v.begin(),v.end(), it); |
| 46 | 152 | } | |
| 47 | |||
| 48 | /*! | ||
| 49 | * \brief Read an input stream into a container | ||
| 50 | * \param stream A standard input stream | ||
| 51 | * \tparam Container The container type requires begin(), end(), push_back() functions | ||
| 52 | * and Container::value_type requires operator>>. | ||
| 53 | */ | ||
| 54 | template<typename Container> | ||
| 55 |
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378 | Container readStreamToContainer(std::istream& stream) |
| 56 | { | ||
| 57 |
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378 | Container v; |
| 58 |
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378 | std::istream_iterator<typename Container::value_type> it(stream); |
| 59 |
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386 | std::copy(it, std::istream_iterator<typename Container::value_type>(), std::back_inserter(v)); |
| 60 | 378 | return v; | |
| 61 | 366 | } | |
| 62 | |||
| 63 | /*! | ||
| 64 | * \brief Read a simple text file into a container | ||
| 65 | * \param filename The filename to write to | ||
| 66 | * \tparam Container The container type requires begin(), end(), push_back() functions | ||
| 67 | * and Container::value_type requires operator>>. | ||
| 68 | * | ||
| 69 | * usage: auto v = readFileToContainer<std::vector<double>>("myvector.txt"); | ||
| 70 | */ | ||
| 71 | template<typename Container> | ||
| 72 | 66 | Container readFileToContainer(const std::string& filename) | |
| 73 | { | ||
| 74 | 66 | std::ifstream infile(filename, std::ios::in); | |
| 75 |
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66 | if (!infile) |
| 76 | ✗ | DUNE_THROW(Dune::IOError, "Could not open file: " << filename); | |
| 77 |
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132 | return readStreamToContainer<Container>(infile); |
| 78 | 66 | } | |
| 79 | |||
| 80 | } // end namespace Dumux | ||
| 81 | |||
| 82 | #endif | ||
| 83 |