[reactos] 02/05: [KERNEL32]: Reimplement GetDiskFreeSpaceA() to make it w2k3 compliant

[Pierre Schweitzer]

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commit 87448f3d8b26a6696f143872874200ef5799565d
Author: Pierre Schweitzer <pierre(a)reactos.org>
AuthorDate: Wed Oct 4 22:30:18 2017 +0200

    [KERNEL32]: Reimplement GetDiskFreeSpaceA() to make it w2k3 compliant
---
 dll/win32/kernel32/client/file/disk.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/dll/win32/kernel32/client/file/disk.c
b/dll/win32/kernel32/client/file/disk.c
index 7ff6e88f1a..5854b2320e 100644
--- a/dll/win32/kernel32/client/file/disk.c
+++ b/dll/win32/kernel32/client/file/disk.c
@@ -189,19 +189,24 @@ GetDiskFreeSpaceA(IN LPCSTR lpRootPathName,
                   OUT LPDWORD lpNumberOfFreeClusters,
                   OUT LPDWORD lpTotalNumberOfClusters)
 {
-    PWCHAR RootPathNameW=NULL;
+    PCSTR RootPath;
+    PUNICODE_STRING RootPathU;
 
-    if (lpRootPathName)
+    RootPath = lpRootPathName;
+    if (RootPath == NULL)
     {
-        if (!(RootPathNameW = FilenameA2W(lpRootPathName, FALSE)))
-            return FALSE;
+        RootPath = "\\";
+    }
+
+    RootPathU = Basep8BitStringToStaticUnicodeString(RootPath);
+    if (RootPathU == NULL)
+    {
+        return FALSE;
     }
 
-    return GetDiskFreeSpaceW (RootPathNameW,
-                              lpSectorsPerCluster,
-                              lpBytesPerSector,
-                              lpNumberOfFreeClusters,
-                              lpTotalNumberOfClusters);
+    return GetDiskFreeSpaceW(RootPathU->Buffer, lpSectorsPerCluster,
+                             lpBytesPerSector, lpNumberOfFreeClusters,
+                             lpTotalNumberOfClusters);
 }
 
 /*

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