[reactos] 01/01: [SHELL32] Fix regression #2703 CORE-17041 (trial) (#3046)

[Katayama Hirofumi MZ]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=1d1bb5332135c192166783...

commit 1d1bb5332135c192166783735cd35447ae699f0d
Author:     Katayama Hirofumi MZ [e-mail]
AuthorDate: Sun Aug 16 11:16:44 2020 +0900
Commit:     GitHub [e-mail]
CommitDate: Sun Aug 16 11:16:44 2020 +0900

[SHELL32] Fix regression #2703 CORE-17041 (trial) (#3046)

CORE-17041
---
 dll/win32/shell32/folders/CDrivesFolder.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/dll/win32/shell32/folders/CDrivesFolder.cpp b/dll/win32/shell32/folders/CDrivesFolder.cpp
index d7246a459bb..a2f90d35f57 100644
--- a/dll/win32/shell32/folders/CDrivesFolder.cpp
+++ b/dll/win32/shell32/folders/CDrivesFolder.cpp
@@ -582,7 +582,7 @@ HRESULT WINAPI CDrivesFolder::ParseDisplayName(HWND hwndOwner, LPBC pbc, LPOLEST
     HRESULT hr = E_INVALIDARG;
     LPCWSTR szNext = NULL;
     LPITEMIDLIST pidlTemp = NULL;
-    WCHAR volumePathName[MAX_PATH];
+    INT nDriveNumber;

TRACE("(%p)->(HWND=%p,%p,%p=%s,%p,pidl=%p,%p)\n", this,
           hwndOwner, pbc, lpszDisplayName, debugstr_w (lpszDisplayName),
@@ -596,12 +596,12 @@ HRESULT WINAPI CDrivesFolder::ParseDisplayName(HWND hwndOwner, LPBC pbc, LPOLEST
     if (lpszDisplayName[0] == ':' && lpszDisplayName[1] == ':')
         return m_regFolder->ParseDisplayName(hwndOwner, pbc, lpszDisplayName, pchEaten, ppidl, pdwAttributes);

-    if (PathGetDriveNumberW(lpszDisplayName) < 0)
+    nDriveNumber = PathGetDriveNumberW(lpszDisplayName);
+    if (nDriveNumber < 0)
         return E_INVALIDARG;

/* check if this drive actually exists */
-    if (!GetVolumePathNameW(lpszDisplayName, volumePathName, _countof(volumePathName)) ||
-        GetDriveTypeW(volumePathName) < DRIVE_REMOVABLE)
+    if ((::GetLogicalDrives() & (1 << nDriveNumber)) == 0)
     {
         return HRESULT_FROM_WIN32(ERROR_INVALID_DRIVE);
     }