From 014ed77130f1812d76f8086e5507e11a880799e4 Mon Sep 17 00:00:00 2001
From: Mounir IDRASSI <mounir.idrassi@idrix.fr>
Date: Tue, 11 Jul 2023 21:21:18 +0200
Subject: Windows: when overwriting an existing file container, add its current
 size to the available free space

---
 src/Format/Tcformat.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/Format')

diff --git a/src/Format/Tcformat.c b/src/Format/Tcformat.c
index e98a25da..368c7d9e 100644
--- a/src/Format/Tcformat.c
+++ b/src/Format/Tcformat.c
@@ -3462,6 +3462,13 @@ BOOL QueryFreeSpace (HWND hwndDlg, HWND hwndTextBox, BOOL display, LONGLONG *pFr
 		else
 		{
 			LARGE_INTEGER lDiskFree;
+			// if the file pointed by szFileName already exists, we must add its size to the free space since it will be overwritten durig the volume creation
+			__int64 lFileSize = GetFileSize64(szFileName);
+			if (lFileSize != -1)
+			{
+				free.QuadPart += lFileSize;
+			}
+
 			lDiskFree.QuadPart = free.QuadPart;
 
 			if (pFreeSpaceValue)
-- 
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