mirror of
https://github.com/matrix-construct/construct
synced 2024-08-25 02:52:09 +02:00
251 lines
5.9 KiB
C++
251 lines
5.9 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_DATE_H
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namespace ircd
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{
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using microtime_t = std::pair<time_t, int32_t>;
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using steady_point = time_point<steady_clock>;
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using system_point = time_point<system_clock>;
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template<class rep, class period> using duration = std::chrono::duration<rep, period>;
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// Standard time_point samples
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template<class unit = seconds> unit now();
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template<> steady_point now();
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template<> system_point now();
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// Standard time_point (system_clock only) directly into long integer.
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template<class unit = seconds> time_t &time(time_t &ref);
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template<class unit = seconds> time_t time();
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template<class unit = seconds> time_t time(time_t *const &ptr);
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// System vdso microtime suite
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microtime_t microtime();
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string_view microtime(const mutable_buffer &);
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// System vdso formatted time suite
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const char *const rfc7231_fmt
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{
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"%a, %d %b %Y %T %z"
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};
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IRCD_OVERLOAD(localtime)
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string_view timef(const mutable_buffer &out, const struct tm &tm, const char *const &fmt = rfc7231_fmt);
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string_view timef(const mutable_buffer &out, const time_t &epoch, const char *const &fmt = rfc7231_fmt);
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string_view timef(const mutable_buffer &out, const time_t &epoch, localtime_t, const char *const &fmt = rfc7231_fmt);
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string_view timef(const mutable_buffer &out, const system_point &epoch, const char *const &fmt = rfc7231_fmt);
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string_view timef(const mutable_buffer &out, const system_point &epoch, localtime_t, const char *const &fmt = rfc7231_fmt);
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string_view timef(const mutable_buffer &out, localtime_t, const char *const &fmt = rfc7231_fmt);
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string_view timef(const mutable_buffer &out, const char *const &fmt = rfc7231_fmt);
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template<size_t max = 128, class... args> std::string timestr(args&&...);
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std::ostream &operator<<(std::ostream &, const microtime_t &);
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std::ostream &operator<<(std::ostream &, const system_point &);
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template<class rep, class period> std::ostream &operator<<(std::ostream &, const duration<rep, period> &);
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}
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template<class rep,
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class period>
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std::ostream &
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ircd::operator<<(std::ostream &s,
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const duration<rep, period> &duration)
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{
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s << duration.count();
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return s;
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}
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inline std::ostream &
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ircd::operator<<(std::ostream &s, const system_point &tp)
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{
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char buf[96];
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return (s << timef(buf, tp));
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}
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inline std::ostream &
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ircd::operator<<(std::ostream &s, const microtime_t &t)
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{
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char buf[64];
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s << microtime(buf);
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return s;
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}
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/// timestr() is a passthru to timef() where you don't give the first argument
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/// (the mutable_buffer). Instead of supplying a buffer an allocated
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/// std::string is returned with the result. By default this string's buffer
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/// is sufficiently large, but may be further tuned in the template parameter.
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template<size_t max,
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class... args>
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std::string
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ircd::timestr(args&&... a)
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{
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return string(max, [&](const mutable_buffer &buf)
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{
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return timef(buf, std::forward<args>(a)...);
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});
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}
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inline ircd::string_view
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ircd::timef(const mutable_buffer &out,
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const char *const &fmt)
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{
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const auto epoch{time()};
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return timef(out, epoch, fmt);
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}
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inline ircd::string_view
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ircd::timef(const mutable_buffer &out,
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localtime_t,
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const char *const &fmt)
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{
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const auto epoch{time()};
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return timef(out, epoch, localtime, fmt);
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}
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inline ircd::string_view
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ircd::timef(const mutable_buffer &out,
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const system_point &epoch,
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localtime_t,
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const char *const &fmt)
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{
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const time_t t
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{
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duration_cast<seconds>(epoch.time_since_epoch()).count()
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};
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return timef(out, t, localtime, fmt);
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}
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inline ircd::string_view
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ircd::timef(const mutable_buffer &out,
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const system_point &epoch,
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const char *const &fmt)
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{
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const time_t t
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{
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duration_cast<seconds>(epoch.time_since_epoch()).count()
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};
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return timef(out, t, fmt);
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}
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inline ircd::string_view
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ircd::timef(const mutable_buffer &out,
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const time_t &epoch,
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localtime_t,
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const char *const &fmt)
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{
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struct tm tm;
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localtime_r(&epoch, &tm);
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return timef(out, tm, fmt);
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}
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inline ircd::string_view
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ircd::timef(const mutable_buffer &out,
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const time_t &epoch,
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const char *const &fmt)
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{
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struct tm tm;
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gmtime_r(&epoch, &tm);
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return timef(out, tm, fmt);
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}
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inline ircd::string_view
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ircd::timef(const mutable_buffer &out,
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const struct tm &tm,
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const char *const &fmt)
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{
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const auto len
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{
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strftime(data(out), size(out), fmt, &tm)
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};
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return { data(out), len };
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}
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inline ircd::string_view
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ircd::microtime(const mutable_buffer &buf)
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{
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const auto mt{microtime()};
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const auto length
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{
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snprintf(data(buf), size(buf), "%zd.%06d", mt.first, mt.second)
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};
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return string_view
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{
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data(buf), size_t(length)
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};
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}
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inline ircd::microtime_t
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ircd::microtime()
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{
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struct timeval tv;
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syscall(&::gettimeofday, &tv, nullptr);
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return { tv.tv_sec, tv.tv_usec };
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}
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template<class unit>
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time_t
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ircd::time(time_t *const &ptr)
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{
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time_t buf, &ret{ptr? *ptr : buf};
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return time<unit>(ret);
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}
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template<class unit>
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time_t
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ircd::time()
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{
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time_t ret;
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return time<unit>(ret);
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}
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template<class unit>
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time_t &
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ircd::time(time_t &ref)
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{
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ref = duration_cast<unit>(system_clock::now().time_since_epoch()).count();
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return ref;
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}
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template<> inline
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ircd::steady_point
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ircd::now()
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{
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return steady_clock::now();
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}
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template<> inline
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ircd::system_point
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ircd::now()
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{
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return system_clock::now();
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}
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template<class unit>
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unit
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ircd::now()
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{
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const auto now
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{
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steady_clock::now()
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};
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const auto tse
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{
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now.time_since_epoch()
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};
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return std::chrono::duration_cast<unit>(tse);
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}
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