From 537cecf0e057ee9e27027c2dde1e199a1edfb275 Mon Sep 17 00:00:00 2001
From: rad9800 <105589633+rad9800@users.noreply.github.com>
Date: Sun, 17 Jul 2022 19:57:06 +0100
Subject: [PATCH] Fix GetFileSize for over 2GB

---
 .../RfGetFileSizeFromPathDisposeHandle.cpp    | 34 +++++++++++--------
 1 file changed, 19 insertions(+), 15 deletions(-)

diff --git a/Windows API/RfGetFileSizeFromPathDisposeHandle.cpp b/Windows API/RfGetFileSizeFromPathDisposeHandle.cpp
index 556ef6c..ea8ee0e 100644
--- a/Windows API/RfGetFileSizeFromPathDisposeHandle.cpp	
+++ b/Windows API/RfGetFileSizeFromPathDisposeHandle.cpp	
@@ -1,33 +1,37 @@
-DWORD RfGetFileSizeFromPathDisposeHandleW(PWCHAR Path, DWORD dwFlagsAndAttributes)
+LONGLONG RfGetFileSizeFromPathDisposeHandleW(PWCHAR Path, DWORD dwFlagsAndAttributes)
 {
-	DWORD Size = ERROR_SUCCESS;
+	LARGE_INTEGER LargeInteger;
 	HANDLE hHandle = INVALID_HANDLE_VALUE;
 		
 	hHandle = CreateFileW(Path, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, dwFlagsAndAttributes, NULL);
 	if (hHandle == INVALID_HANDLE_VALUE)
 		return INVALID_FILE_SIZE;
 
-	Size = GetFileSize(hHandle, NULL);
+	if (GetFileSizeEx(hHandle, &LargeInteger))
+	{
+		if (hHandle)
+			CloseHandle(hHandle);
+		return LargeInteger.QuadPart;
+	}
 	
-	if (hHandle)
-		CloseHandle(hHandle);
-
-	return Size;
+	return INVALID_FILE_SIZE;
 }
 
-DWORD RfGetFileSizeFromPathDisposeHandleA(PCHAR Path, DWORD dwFlagsAndAttributes)
+LONGLONG RfGetFileSizeFromPathDisposeHandleA(PCHAR Path, DWORD dwFlagsAndAttributes)
 {
-	DWORD Size = ERROR_SUCCESS;
+	LARGE_INTEGER LargeInteger;
 	HANDLE hHandle = INVALID_HANDLE_VALUE;
 
 	hHandle = CreateFileA(Path, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, dwFlagsAndAttributes, NULL);
 	if (hHandle == INVALID_HANDLE_VALUE)
 		return INVALID_FILE_SIZE;
 
-	Size = GetFileSize(hHandle, NULL);
-
-	if (hHandle)
-		CloseHandle(hHandle);
-
-	return Size;
+	if (GetFileSizeEx(hHandle, &LargeInteger))
+	{
+		if (hHandle)
+			CloseHandle(hHandle);
+		return LargeInteger.QuadPart;
+	}
+	
+	return INVALID_FILE_SIZE;
 }