[llvm] r315597 - Work around lack of Wine support for SetFileInformationByHandle harder

[Hans Wennborg via llvm-commits]

Author: hans
Date: Thu Oct 12 10:38:22 2017
New Revision: 315597

URL: http://llvm.org/viewvc/llvm-project?rev=315597&view=rev
Log:
Work around lack of Wine support for SetFileInformationByHandle harder

In r315079 I added a check for the ERROR_CALL_NOT_IMPLEMENTED error
code, but it turns out earlier versions of Wine just returned false
without setting any error code.

This patch handles the unset error code case.

Modified:
    llvm/trunk/lib/Support/Windows/Path.inc

Modified: llvm/trunk/lib/Support/Windows/Path.inc
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/Windows/Path.inc?rev=315597&r1=315596&r2=315597&view=diff
==============================================================================
--- llvm/trunk/lib/Support/Windows/Path.inc (original)
+++ llvm/trunk/lib/Support/Windows/Path.inc Thu Oct 12 10:38:22 2017
@@ -377,9 +377,14 @@ static std::error_code rename_internal(H
   RenameInfo.FileNameLength = ToWide.size();
   std::copy(ToWide.begin(), ToWide.end(), &RenameInfo.FileName[0]);
 
+  SetLastError(ERROR_SUCCESS);
   if (!SetFileInformationByHandle(FromHandle, FileRenameInfo, &RenameInfo,
-                                  RenameInfoBuf.size()))
-    return mapWindowsError(GetLastError());
+                                  RenameInfoBuf.size())) {
+    unsigned Error = GetLastError();
+    if (Error == ERROR_SUCCESS)
+      Error = ERROR_CALL_NOT_IMPLEMENTED; // Wine doesn't always set error code.
+    return mapWindowsError(Error);
+  }
 
   return std::error_code();
 }