| 1 | // Copyright (C) 2023 Ahmad Samir <a.samirh78@gmail.com> |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #ifndef Q20CHRONO_H |
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| 5 | #define Q20CHRONO_H |
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| 6 | |
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| 7 | #include <QtCore/qtconfigmacros.h> |
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| 8 | |
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| 9 | #include <chrono> |
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| 10 | |
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| 11 | // |
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| 12 | // W A R N I N G |
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| 13 | // ------------- |
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| 14 | // |
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| 15 | // This file is not part of the Qt API. Types and functions defined in this |
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| 16 | // file can reliably be replaced by their std counterparts, once available. |
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| 17 | // You may use these definitions in your own code, but be aware that we |
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| 18 | // will remove them once Qt depends on the C++ version that supports |
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| 19 | // them in namespace std. There will be NO deprecation warning, the |
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| 20 | // definitions will JUST go away. |
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| 21 | // |
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| 22 | // If you can't agree to these terms, don't use these definitions! |
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| 23 | // |
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| 24 | // We mean it. |
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| 25 | // |
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| 26 | |
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| 27 | QT_BEGIN_NAMESPACE |
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| 28 | |
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| 29 | namespace q20 { |
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| 30 | namespace chrono { |
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| 31 | |
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| 32 | #if defined(__GLIBCXX__) |
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| 33 | // https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=libstdc%2B%2B-v3/include/bits/chrono.h |
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| 34 | using IntRep = int64_t; |
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| 35 | #else |
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| 36 | // https://github.com/llvm/llvm-project/blob/main/libcxx/include/__chrono/duration.h |
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| 37 | // https://github.com/microsoft/STL/blob/main/stl/inc/__msvc_chrono.hpp |
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| 38 | using IntRep = int; |
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| 39 | #endif |
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| 40 | |
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| 41 | #if __cpp_lib_chrono >= 201907L |
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| 42 | using std::chrono::days; |
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| 43 | using std::chrono::weeks; |
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| 44 | using std::chrono::years; |
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| 45 | using std::chrono::months; |
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| 46 | |
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| 47 | static_assert(std::is_same_v<days::rep, IntRep>); |
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| 48 | static_assert(std::is_same_v<weeks::rep, IntRep>); |
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| 49 | static_assert(std::is_same_v<years::rep, IntRep>); |
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| 50 | static_assert(std::is_same_v<months::rep, IntRep>); |
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| 51 | #else |
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| 52 | using days = std::chrono::duration<IntRep, std::ratio<86400>>; |
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| 53 | using weeks = std::chrono::duration<IntRep, std::ratio_multiply<std::ratio<7>, days::period>>; |
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| 54 | using years = std::chrono::duration<IntRep, std::ratio_multiply<std::ratio<146097, 400>, days::period>>; |
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| 55 | using months = std::chrono::duration<IntRep, std::ratio_divide<years::period, std::ratio<12>>>; |
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| 56 | #endif // __cpp_lib_chrono >= 201907L |
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| 57 | } // namespace chrono |
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| 58 | } // namespace q20 |
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| 59 | |
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| 60 | QT_END_NAMESPACE |
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| 61 | |
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| 62 | #endif /* Q20CHRONO_H */ |
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| 63 | |
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