41 lines
1.3 KiB
C++
41 lines
1.3 KiB
C++
#include <ranczo-io/utils/date_utils.hpp>
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#include <boost/date_time/posix_time/posix_time.hpp>
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namespace ranczo::date {
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std::optional< std::chrono::system_clock::time_point > parse_timestamp_utc(std::string_view sv) noexcept {
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try {
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// Strip trailing 'Z' if present; Boost expects no timezone marker
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std::string s(sv);
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if(!s.empty() && (s.back() == 'Z' || s.back() == 'z'))
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s.pop_back();
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// Parse as extended ISO string
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using namespace boost::posix_time;
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ptime t = from_iso_extended_string(s); // may throw on invalid
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static const ptime epoch{boost::gregorian::date{1970, 1, 1}};
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time_duration d = t - epoch;
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// Keep sub-second precision if present (microseconds is enough for the given example)
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auto us = d.total_microseconds();
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return std::chrono::system_clock::time_point{std::chrono::microseconds{us}};
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} catch(...) {
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return std::nullopt;
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}
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}
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std::pmr::string to_iso_timestamp(std::chrono::system_clock::time_point tp, std::pmr::memory_resource *mr)
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{
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BOOST_ASSERT(mr);
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char buf[32]={};
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std::time_t t = std::chrono::system_clock::to_time_t(tp);
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std::tm tm = *std::gmtime(&t);
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std::strftime(buf, sizeof(buf), "%FT%TZ", &tm);
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return {buf, mr};
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}
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} // namespace ranczo::date
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