From 1c4007bcd197f97f7ed67ba12af3019214256a24 Mon Sep 17 00:00:00 2001
From: Mast <mast9@llnl.gov>
Date: Mon, 7 Oct 2024 16:16:07 -0700
Subject: [PATCH] fix OverflowError when System.DateTime has DateTimeKind bits
 set

---
 src/dnfile/resource.py | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/dnfile/resource.py b/src/dnfile/resource.py
index 267d32c..375fea5 100644
--- a/src/dnfile/resource.py
+++ b/src/dnfile/resource.py
@@ -225,11 +225,18 @@ def type_str_to_type(self, type_name: str, data: bytes, offset: int) -> Tuple[Op
             tsize = 8
             final_bytes = data[offset:offset + tsize]
             x = struct.unpack("<q", final_bytes)[0]
+            # Value is stored in lower 62-bits
+            # https://github.com/dotnet/runtime/blob/17c55f1/src/libraries/System.Private.CoreLib/src/System/DateTime.cs#L130-L138
+            x = x & ((1 << 62) - 1)
             # https://stackoverflow.com/questions/3169517/python-c-sharp-binary-datetime-encoding
             secs = x / 10.0 ** 7
             delta = datetime.timedelta(seconds=secs)
-            dt = datetime.datetime(1, 1, 1) + delta
-            final_value = dt
+            try:
+                dt = datetime.datetime(1, 1, 1) + delta
+                final_value = dt
+            except OverflowError:
+                # TODO warn/error
+                pass
         elif type_name == "System.TimeSpan":
             # TODO return resourceDataFactory.Create(new TimeSpan(reader.ReadInt64()));
             tsize = 8