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0b96ae1f6a
Run the `clang-format.bash` script to update all our C and C++ code to a new style defined by `.clang-format`, now with "east const" enforcement. Use `clang-format` version 18. * If you reached this commit for a line in `git blame`, re-run the blame operation starting at the parent of this commit to see older history for the content. * See the parent commit for instructions to rebase a change across this style transition commit. Issue: #26123
142 lines
3.3 KiB
C++
142 lines
3.3 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#pragma once
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#include "cmConfigure.h" // IWYU pragma: keep
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#include <string>
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/** \class cmFileTime
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* \brief Abstract file modification time with support for comparison with
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* other file modification times.
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*/
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class cmFileTime
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{
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public:
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using TimeType = long long;
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// unit time per second
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#if !defined(_WIN32) || defined(__CYGWIN__)
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// unit time is one nanosecond
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static constexpr TimeType UtPerS = 1000000000;
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#else
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// unit time is 100 nanosecond
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static constexpr TimeType UtPerS = 10000000;
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#endif
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cmFileTime() = default;
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~cmFileTime() = default;
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cmFileTime(cmFileTime const&) = default;
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cmFileTime& operator=(cmFileTime const&) = default;
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/**
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* @brief Loads the file time of fileName from the file system
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* @return true on success
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*/
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bool Load(std::string const& fileName);
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/**
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* @brief Return true if this is older than ftm
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*/
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bool Older(cmFileTime const& ftm) const
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{
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return (this->Time - ftm.Time) < 0;
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}
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/**
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* @brief Return true if this is newer than ftm
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*/
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bool Newer(cmFileTime const& ftm) const
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{
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return (ftm.Time - this->Time) < 0;
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}
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/**
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* @brief Return true if this is the same as ftm
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*/
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bool Equal(cmFileTime const& ftm) const { return this->Time == ftm.Time; }
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/**
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* @brief Return true if this is not the same as ftm
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*/
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bool Differ(cmFileTime const& ftm) const { return this->Time != ftm.Time; }
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/**
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* @brief Compare file modification times.
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* @return -1, 0, +1 for this older, same, or newer than ftm.
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*/
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int Compare(cmFileTime const& ftm) const
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{
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TimeType const diff = this->Time - ftm.Time;
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if (diff == 0) {
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return 0;
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}
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return (diff < 0) ? -1 : 1;
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}
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// -- Comparison in second resolution
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/**
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* @brief Return true if this is at least a second older than ftm
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*/
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bool OlderS(cmFileTime const& ftm) const
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{
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return (ftm.Time - this->Time) >= cmFileTime::UtPerS;
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}
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/**
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* @brief Return true if this is at least a second newer than ftm
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*/
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bool NewerS(cmFileTime const& ftm) const
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{
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return (this->Time - ftm.Time) >= cmFileTime::UtPerS;
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}
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/**
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* @brief Return true if this is within the same second as ftm
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*/
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bool EqualS(cmFileTime const& ftm) const
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{
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TimeType diff = this->Time - ftm.Time;
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if (diff < 0) {
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diff = -diff;
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}
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return (diff < cmFileTime::UtPerS);
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}
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/**
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* @brief Return true if this is older or newer than ftm by at least a second
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*/
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bool DifferS(cmFileTime const& ftm) const
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{
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TimeType diff = this->Time - ftm.Time;
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if (diff < 0) {
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diff = -diff;
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}
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return (diff >= cmFileTime::UtPerS);
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}
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/**
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* @brief Compare file modification times.
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* @return -1: this at least a second older, 0: this within the same second
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* as ftm, +1: this at least a second newer than ftm.
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*/
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int CompareS(cmFileTime const& ftm) const
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{
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TimeType const diff = this->Time - ftm.Time;
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if (diff <= -cmFileTime::UtPerS) {
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return -1;
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}
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if (diff >= cmFileTime::UtPerS) {
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return 1;
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}
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return 0;
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}
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/**
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* @brief The file modification time in unit time per second
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*/
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TimeType GetTime() const { return this->Time; }
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private:
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TimeType Time = 0;
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};
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