1 files changed, 68 insertions, 0 deletions
diff --git a/source/core/StarTime_windows.cpp b/source/core/StarTime_windows.cpp
new file mode 100644
index 0000000..2b3e797
--- /dev/null
+++ b/source/core/StarTime_windows.cpp
@@ -0,0 +1,68 @@
+#include "StarTime.hpp"
+#include "StarLexicalCast.hpp"
+#include "StarMathCommon.hpp"
+
+#include <ctime>
+#include <windows.h>
+
+namespace Star {
+
+String Time::printDateAndTime(int64_t epochTicks, String format) {
+  // playing fast and loose with the standard here...
+  time_t requestedTime = epochTicks / epochTickFrequency();
+  struct tm* ptm;
+  ptm = localtime(&requestedTime);
+
+  return format.replaceTags(StringMap<String>{
+      {"year", strf("%04d", ptm->tm_year + 1900)},
+      {"month", strf("%02d", ptm->tm_mon + 1)},
+      {"day", strf("%02d", ptm->tm_mday)},
+      {"hours", strf("%02d", ptm->tm_hour)},
+      {"minutes", strf("%02d", ptm->tm_min)},
+      {"seconds", strf("%02d", ptm->tm_sec)},
+      {"millis", strf("%03d", (epochTicks % epochTickFrequency()) / (epochTickFrequency() / 1000))},
+    });
+}
+
+int64_t Time::epochTicks() {
+  FILETIME ft_now;
+  GetSystemTimeAsFileTime(&ft_now);
+  LONGLONG now = (LONGLONG)ft_now.dwLowDateTime + ((LONGLONG)(ft_now.dwHighDateTime) << 32LL);
+  now -= 116444736000000000LL;
+  return now;
+}
+
+int64_t Time::epochTickFrequency() {
+  return 10000000LL;
+}
+
+struct MonotonicClock {
+  MonotonicClock() {
+    QueryPerformanceFrequency(&freq);
+  };
+
+  int64_t ticks() const {
+    LARGE_INTEGER ticks;
+    QueryPerformanceCounter(&ticks);
+    return ticks.QuadPart;
+  }
+
+  int64_t frequency() const {
+    return freq.QuadPart;
+  }
+
+  LARGE_INTEGER freq;
+};
+
+static MonotonicClock g_monotonicClock;
+
+int64_t Time::monotonicTicks() {
+  return g_monotonicClock.ticks();
+}
+
+int64_t Time::monotonicTickFrequency() {
+  return g_monotonicClock.frequency();
+}
+
+
+}