From bcef20b32d93e14f162caa83cf25497b67dcb08e Mon Sep 17 00:00:00 2001
From: anders_k <anders_k@212acab6-be3b-0410-9dea-997c60f758d6>
Date: Mon, 5 Jun 2017 21:43:07 +0000
Subject: [PATCH] Bring back optimized mystrcpy(tmpbuf, _T("NUL")) from NSIS2

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@6869 212acab6-be3b-0410-9dea-997c60f758d6
---
 Source/exehead/util.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Source/exehead/util.c b/Source/exehead/util.c
index c4db02d4..138b9f68 100644
--- a/Source/exehead/util.c
+++ b/Source/exehead/util.c
@@ -546,7 +546,11 @@ void RenameViaWininit(const TCHAR* prevName, const TCHAR* newName)
 
   int spn;   // length of the short path name in TCHARs.
 
-  mystrcpy(tmpbuf, _T("NUL"));
+  // Optimized mystrcpy(tmpbuf, _T("NUL")):
+  if (sizeof(TCHAR) == 1)
+    *(UINT32*)tmpbuf = ((UINT32)'N' <<  0) | ((UINT32)'U' <<  8) | ((UINT32)'L' << 16) | ((UINT32)'\0' << 24);
+  else
+    *(UINT64*)tmpbuf = ((UINT64)'N' <<  0) | ((UINT64)'U' << 16) | ((UINT64)'L' << 32) | ((UINT64)'\0' << 48);
 
   if (newName) {
     // create the file if it's not already there to prevent GetShortPathName from failing