From 4f0824fd766d53005ca615d7f1a327572705667e Mon Sep 17 00:00:00 2001
From: Silent <zdanio95@gmail.com>
Date: Sun, 22 May 2022 16:14:56 +0200
Subject: [PATCH] Fix a Y2038 bug in timeToFILETIME

The old code truncated time_t to a 32-bit value
when using Int32x32To64. This example code has been fixed
on MSDN a while ago, so this change only updates it to
the current version.

More on this issue:
https://cookieplmonster.github.io/2022/02/17/year-2038-problem/
---
 include/ghc/filesystem.hpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/ghc/filesystem.hpp b/include/ghc/filesystem.hpp
index 9540b44..485bd44 100644
--- a/include/ghc/filesystem.hpp
+++ b/include/ghc/filesystem.hpp
@@ -2241,10 +2241,10 @@ GHC_INLINE time_t timeFromFILETIME(const FILETIME& ft)
 
 GHC_INLINE void timeToFILETIME(time_t t, FILETIME& ft)
 {
-    LONGLONG ll;
-    ll = Int32x32To64(t, 10000000) + 116444736000000000;
-    ft.dwLowDateTime = static_cast<DWORD>(ll);
-    ft.dwHighDateTime = static_cast<DWORD>(ll >> 32);
+    ULARGE_INTEGER ull;
+    ull.QuadPart = static_cast<ULONGLONG>((t * 10000000LL) + 116444736000000000LL);
+    ft.dwLowDateTime = ull.LowPart;
+    ft.dwHighDateTime = ull.HighPart;
 }
 
 template <typename INFO>