1 files changed, 119 insertions, 0 deletions
diff --git a/src/libs/3rdparty/botan/src/lib/utils/calendar.cpp b/src/libs/3rdparty/botan/src/lib/utils/calendar.cpp
new file mode 100644
index 0000000000..fe04f1d239
--- /dev/null
+++ b/src/libs/3rdparty/botan/src/lib/utils/calendar.cpp
@@ -0,0 +1,119 @@
+/*
+* Calendar Functions
+* (C) 1999-2010,2017 Jack Lloyd
+* (C) 2015 Simon Warta (Kullo GmbH)
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/calendar.h>
+#include <botan/exceptn.h>
+#include <ctime>
+#include <sstream>
+#include <iomanip>
+#include <stdlib.h>
+
+namespace Botan {
+
+namespace {
+
+std::tm do_gmtime(std::time_t time_val)
+   {
+   std::tm tm;
+
+#if defined(BOTAN_TARGET_OS_HAS_WIN32)
+   ::gmtime_s(&tm, &time_val); // Windows
+#elif defined(BOTAN_TARGET_OS_HAS_POSIX1)
+   ::gmtime_r(&time_val, &tm); // Unix/SUSv2
+#else
+   std::tm* tm_p = std::gmtime(&time_val);
+   if (tm_p == nullptr)
+      throw Encoding_Error("time_t_to_tm could not convert");
+   tm = *tm_p;
+#endif
+
+   return tm;
+   }
+
+/*
+Portable replacement for timegm, _mkgmtime, etc
+
+Algorithm due to Howard Hinnant
+
+See https://howardhinnant.github.io/date_algorithms.html#days_from_civil
+for details and explaination. The code is slightly simplified by our assumption
+that the date is at least 1970, which is sufficient for our purposes.
+*/
+size_t days_since_epoch(uint32_t year, uint32_t month, uint32_t day)
+   {
+   if(month <= 2)
+      year -= 1;
+   const uint32_t era = year / 400;
+   const uint32_t yoe = year - era * 400;      // [0, 399]
+   const uint32_t doy = (153*(month + (month > 2 ? -3 : 9)) + 2)/5 + day-1;  // [0, 365]
+   const uint32_t doe = yoe * 365 + yoe/4 - yoe/100 + doy;         // [0, 146096]
+   return era * 146097 + doe - 719468;
+   }
+
+}
+
+std::chrono::system_clock::time_point calendar_point::to_std_timepoint() const
+   {
+   if(get_year() < 1970)
+      throw Invalid_Argument("calendar_point::to_std_timepoint() does not support years before 1970");
+
+   // 32 bit time_t ends at January 19, 2038
+   // https://msdn.microsoft.com/en-us/library/2093ets1.aspx
+   // Throw after 2037 if 32 bit time_t is used
+   if(get_year() > 2037 && sizeof(std::time_t) == 4)
+      {
+      throw Invalid_Argument("calendar_point::to_std_timepoint() does not support years after 2037 on this system");
+      }
+   else if(get_year() >= 2400)
+      {
+      // This upper bound is somewhat arbitrary
+      throw Invalid_Argument("calendar_point::to_std_timepoint() does not support years after 2400");
+      }
+
+   const uint64_t seconds_64 = (days_since_epoch(get_year(), get_month(), get_day()) * 86400) +
+                                (get_hour() * 60 * 60) + (get_minutes() * 60) + get_seconds();
+
+   const time_t seconds_time_t = static_cast<time_t>(seconds_64);
+
+   if(seconds_64 - seconds_time_t != 0)
+      {
+      throw Invalid_Argument("calendar_point::to_std_timepoint time_t overflow");
+      }
+
+   return std::chrono::system_clock::from_time_t(seconds_time_t);
+   }
+
+std::string calendar_point::to_string() const
+   {
+   // desired format: <YYYY>-<MM>-<dd>T<HH>:<mm>:<ss>
+   std::stringstream output;
+   output << std::setfill('0')
+          << std::setw(4) << get_year() << "-"
+          << std::setw(2) << get_month() << "-"
+          << std::setw(2) << get_day() << "T"
+          << std::setw(2) << get_hour() << ":"
+          << std::setw(2) << get_minutes() << ":"
+          << std::setw(2) << get_seconds();
+   return output.str();
+   }
+
+
+calendar_point calendar_value(
+   const std::chrono::system_clock::time_point& time_point)
+   {
+   std::tm tm = do_gmtime(std::chrono::system_clock::to_time_t(time_point));
+
+   return calendar_point(tm.tm_year + 1900,
+                         tm.tm_mon + 1,
+                         tm.tm_mday,
+                         tm.tm_hour,
+                         tm.tm_min,
+                         tm.tm_sec);
+   }
+
+}