[PATCH 5/5] ntdll: Lookup extension from the end in hash_short_file_name.

[Rémi Bernon]

From: Rémi Bernon

---
 dlls/ntdll/unix/file.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/ntdll/unix/file.c b/dlls/ntdll/unix/file.c
index 67a4d4b6c89..f1d7742e238 100644
--- a/dlls/ntdll/unix/file.c
+++ b/dlls/ntdll/unix/file.c
@@ -1369,7 +1369,8 @@ static ULONG hash_short_file_name( const WCHAR *name, int length, LPWSTR buffer
     }

/* Find last dot for start of the extension */
-    for (p = name + 1, ext = NULL; p < end - 1; p++) if (*p == '.') ext = p;
+    for (ext = end - 2; ext > name; ext--) if (*ext == '.') break;
+    if (ext == name) ext = NULL;

/* Copy first 4 chars, replacing invalid chars with '_' */
     for (i = 4, p = name, dst = buffer; i > 0; i--, p++)