From 909ff807e78b0b92afffaf0d5ed7149982d8ac33 Mon Sep 17 00:00:00 2001
From: Ladislav Zezula <zezula@volny.cz>
Date: Sat, 30 Dec 2023 08:59:09 +0100
Subject: Regression tests passed

---
 src/SFileOpenArchive.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/SFileOpenArchive.cpp')

diff --git a/src/SFileOpenArchive.cpp b/src/SFileOpenArchive.cpp
index baad848..4b2d3b4 100644
--- a/src/SFileOpenArchive.cpp
+++ b/src/SFileOpenArchive.cpp
@@ -463,6 +463,11 @@ bool WINAPI SFileOpenArchive(
         if(IsStarcraftBetaArchive(ha->pHeader))
             ha->dwFlags |= MPQ_FLAG_STARCRAFT_BETA;
 
+        // Set the mask for the file offset. In MPQs version 1,
+        // all offsets are 32-bit and overflow is allowed.
+        // For MPQs v2+, file offset if 64-bit.
+        ha->FileOffsetMask = GetFileOffsetMask(ha);
+
         // Maps from StarCraft and Warcraft III need special treatment
         switch(MapType)
         {
-- 
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