| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 Helper functions for working with std::chrono. | ||
| 11 | */ | ||
| 12 | #ifndef DUMUX_IO_CHRONO_HH | ||
| 13 | #define DUMUX_IO_CHRONO_HH | ||
| 14 | |||
| 15 | #include <array> | ||
| 16 | #include <cctype> | ||
| 17 | #include <chrono> | ||
| 18 | #include <string> | ||
| 19 | #include <string_view> | ||
| 20 | #include <algorithm> | ||
| 21 | |||
| 22 | #include <dune/common/exceptions.hh> | ||
| 23 | |||
| 24 | namespace Dumux::Chrono { | ||
| 25 | |||
| 26 | //! Try to construct a std::chrono::duration from a string | ||
| 27 | template<typename Rep, typename Period> | ||
| 28 | 27 | void toDuration(std::chrono::duration<Rep, Period>& duration, const std::string& s) | |
| 29 | { | ||
| 30 | using std::chrono::duration_cast; | ||
| 31 | using namespace std::chrono_literals; | ||
| 32 | using S = std::chrono::duration<Rep>; | ||
| 33 | 27 | constexpr std::array<std::pair<std::string_view, S>, 9> unitMap{{ | |
| 34 | {"", S(1)}, // assume seconds if no unit is given | ||
| 35 | {"s", S(1)}, | ||
| 36 | {"ns", duration_cast<S>(std::chrono::nanoseconds(1))}, | ||
| 37 | {"us", duration_cast<S>(std::chrono::microseconds(1))}, | ||
| 38 | {"ms", duration_cast<S>(std::chrono::milliseconds(1))}, | ||
| 39 | {"min", duration_cast<S>(std::chrono::minutes(1))}, | ||
| 40 | {"h", duration_cast<S>(std::chrono::hours(1))}, | ||
| 41 | // After requiring cpp20, we can use the aliases in std::chrono | ||
| 42 | {"d", duration_cast<S>(std::chrono::hours(24))}, | ||
| 43 | {"y", duration_cast<S>(std::chrono::seconds(31556952))} // to match cpp20, see https://en.cppreference.com/w/cpp/chrono/duration | ||
| 44 | }}; | ||
| 45 | |||
| 46 |
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64 | const auto unitIt = std::find_if(s.rbegin(), s.rend(), [] (const auto& c) { return !std::isalpha(c); }); |
| 47 | 27 | const auto unitPos = s.size() - std::distance(s.rbegin(), unitIt); | |
| 48 | 54 | const auto number = std::stod(s.substr(0, unitPos)); | |
| 49 | 27 | const auto unit = s.substr(unitPos); | |
| 50 | 27 | const auto conversion = [&] () { | |
| 51 |
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123 | const auto it = std::find_if(unitMap.begin(), unitMap.end(), [u=std::string_view{unit}] (const auto& p) { |
| 52 | 96 | return p.first == u; | |
| 53 | }); | ||
| 54 |
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27 | if (it == unitMap.end()) |
| 55 | ✗ | DUNE_THROW(Dune::InvalidStateException, "Unsupported unit " << unit << "."); | |
| 56 | 27 | return it->second; | |
| 57 |
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27 | } (); |
| 58 | 27 | duration = duration_cast<std::chrono::duration<Rep, Period>>(number*conversion); | |
| 59 | 27 | } | |
| 60 | |||
| 61 | //! Try to construct an instance of std::chrono::seconds from a string including a unit suffix | ||
| 62 | template<typename Rep = double> | ||
| 63 | 27 | std::chrono::duration<Rep> toSeconds(const std::string& s) | |
| 64 | { | ||
| 65 | std::chrono::duration<Rep> result; | ||
| 66 |
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27 | toDuration(result, s); |
| 67 |
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27 | return result; |
| 68 | } | ||
| 69 | |||
| 70 | } // end namespace Dumux::Chrono | ||
| 71 | |||
| 72 | #endif | ||
| 73 |