MdeModulePkg: Refine type cast for pointer subtraction

[mirror_edk2.git] / MdeModulePkg / Library / FileExplorerLib / FileExplorer.c

diff --git a/MdeModulePkg/Library/FileExplorerLib/FileExplorer.c b/MdeModulePkg/Library/FileExplorerLib/FileExplorer.c
index 5eedad72039d0392f75914b35c511ddbe610c549..9182751ad75bdaaee0f01a10bd132fc0bf4bc43b 100644 (file)
--- a/MdeModulePkg/Library/FileExplorerLib/FileExplorer.c
+++ b/MdeModulePkg/Library/FileExplorerLib/FileExplorer.c
@@ -728,7 +728,7 @@ LibAppendFileName (
       // that overlap.\r
       //\r
       StrCpyS (TmpStr, MaxLen, Ptr + 3);\r
-      StrCpyS (LastSlash, MaxLen - (UINTN) (LastSlash - Str), TmpStr);\r
+      StrCpyS (LastSlash, MaxLen - ((UINTN) LastSlash - (UINTN) Str) / sizeof (CHAR16), TmpStr);\r
       Ptr = LastSlash;\r
     } else if (*Ptr == '\\' && *(Ptr + 1) == '.' && *(Ptr + 2) == '\\') {\r
       //\r
@@ -740,7 +740,7 @@ LibAppendFileName (
       // that overlap.\r
       //\r
       StrCpyS (TmpStr, MaxLen, Ptr + 2);\r
-      StrCpyS (Ptr, MaxLen - (UINTN) (Ptr - Str), TmpStr);\r
+      StrCpyS (Ptr, MaxLen - ((UINTN) Ptr - (UINTN) Str) / sizeof (CHAR16), TmpStr);\r
       Ptr = LastSlash;\r
     } else if (*Ptr == '\\') {\r
       LastSlash = Ptr;\r