updated build system

support/src/utils/time.cpp

@@ -0,0 +1,107 @@
+/*
+  Copyright <2018-2024> <scott.e.graves@protonmail.com>
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+  SOFTWARE.
+*/
+#include "utils/time.hpp"
+
+namespace repertory::utils::time {
+#if defined(_WIN32)
+// https://www.frenk.com/2009/12/convert-filetime-to-unix-timestamp/
+auto filetime_to_unix_time(const FILETIME &file_time) -> std::uint64_t {
+  LARGE_INTEGER date{};
+  date.HighPart = static_cast<LONG>(file_time.dwHighDateTime);
+  date.LowPart = file_time.dwLowDateTime;
+  date.QuadPart -= 116444736000000000LL;
+
+  return static_cast<std::uint64_t>(date.QuadPart) * 100ULL;
+}
+#endif // defined(_WIN32)
+
+auto get_file_time_now() -> std::uint64_t {
+#if defined(_WIN32)
+  SYSTEMTIME sys_time{};
+  ::GetSystemTime(&sys_time);
+
+  FILETIME file_time{};
+  ::SystemTimeToFileTime(&sys_time, &file_time);
+  return static_cast<std::uint64_t>(
+      (reinterpret_cast<LARGE_INTEGER *>(&file_time))->QuadPart);
+#else  // !defined(_WIN32)
+  return get_time_now();
+#endif // defined(_WIN32)
+}
+
+void get_local_time_now(struct tm &local_time) {
+  std::memset(&local_time, 0, sizeof(local_time));
+
+  const auto now =
+      std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
+#if defined(_WIN32)
+  localtime_s(&local_time, &now);
+#else  // !defined(_WIN32)
+  localtime_r(&now, &local_time);
+#endif // defined(_WIN32)
+}
+
+auto get_time_now() -> std::uint64_t {
+#if defined(_WIN32)
+  return static_cast<std::uint64_t>(
+      std::chrono::system_clock::to_time_t(std::chrono::system_clock::now()));
+#endif // defined(_WIN32)
+
+#if defined(__APPLE__)
+  return std::chrono::nanoseconds(
+             std::chrono::system_clock::now().time_since_epoch())
+      .count();
+#else  // !defined(__APPLE__)
+  return static_cast<std::uint64_t>(
+      std::chrono::nanoseconds(
+          std::chrono::high_resolution_clock::now().time_since_epoch())
+          .count());
+#endif // defined(__APPLE__)
+}
+
+#if defined(_WIN32)
+// https://stackoverflow.com/questions/321849/strptime-equivalent-on-windows
+auto strptime(const char *s, const char *f, struct tm *tm) -> const char * {
+  std::istringstream input{s};
+  input.imbue(std::locale(setlocale(LC_ALL, nullptr)));
+  input >> std::get_time(tm, f);
+  if (input.fail()) {
+    return nullptr;
+  }
+
+  return reinterpret_cast<const char *>(s + input.tellg());
+}
+
+auto time64_to_unix_time(const __time64_t &time) -> std::uint64_t {
+  return static_cast<std::uint64_t>(time * NANOS_PER_SECOND);
+}
+
+// https://www.frenk.com/2009/12/convert-filetime-to-unix-timestamp/
+auto unix_time_to_filetime(std::uint64_t unix_time) -> FILETIME {
+  const auto win_time = (unix_time / 100ULL) + 116444736000000000ULL;
+  FILETIME file_time{};
+  file_time.dwHighDateTime = static_cast<DWORD>(win_time >> 32U);
+  file_time.dwLowDateTime = win_time & 0xFFFFFFFF;
+  return file_time;
+}
+#endif // defined(_WIN32)
+} // namespace repertory::utils::time