From c30b2843733258fb2024d204238bd7ec1b960ea9 Mon Sep 17 00:00:00 2001
From: Vitaly Orekhov <vkvo2000@vivaldi.net>
Date: Tue, 5 Mar 2024 11:42:27 +0300
Subject: [PATCH] [ATL] Implement CSimpleStringT::Preallocate (#6574)

Used in `ATL::CStringW` and `ATL::CStringA`, for example:

```
ATL::CStringW cswItemText = "";
cswItemText.Preallocate(64);

SendDlgItemMessageW(pdis->CtlID, LB_GETTEXT, pdis->itemID, reinterpret_cast<LPARAM>(cswItemText.GetBuffer()));
cswItemText.ReleaseBuffer();
```

This public function is used to allocate memory for the string via private PrepareWrite, but it's missing somehow. Now it shouldn't be.
---
 sdk/lib/atl/atlsimpstr.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sdk/lib/atl/atlsimpstr.h b/sdk/lib/atl/atlsimpstr.h
index 2b571a299e0..ce0286602b4 100644
--- a/sdk/lib/atl/atlsimpstr.h
+++ b/sdk/lib/atl/atlsimpstr.h
@@ -373,6 +373,11 @@ public:
         return m_pszData;
     }
 
+    void Preallocate(_In_ int nLength)
+    {
+        PrepareWrite(nLength);
+    }
+
     void ReleaseBufferSetLength(_In_ int nNewLength)
     {
         ATLASSERT(nNewLength >= 0);