From 0ab9548200a0bc81143872d2cbca3565aeb95730 Mon Sep 17 00:00:00 2001
From: kichik <kichik@212acab6-be3b-0410-9dea-997c60f758d6>
Date: Fri, 15 Aug 2008 18:50:39 +0000
Subject: [PATCH] added service pack support for old versions of nt that didn't
 support OSVERSIONINFOEX

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@5703 212acab6-be3b-0410-9dea-997c60f758d6
---
 Include/WinVer.nsh | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Include/WinVer.nsh b/Include/WinVer.nsh
index 949eae84..7b91bae5 100644
--- a/Include/WinVer.nsh
+++ b/Include/WinVer.nsh
@@ -177,6 +177,21 @@
     ${If} $0 <> 0
       ; $2 = ($1)->wServicePackMajor
       System::Call /NOUNLOAD '*$1(&t148, &i2.r2)'
+    ${Else}
+      ; ($1)->dwOSVersionInfoSize = sizeof(OSVERSIONINFOA)
+      System::Call /NOUNLOAD '*$1(&i4 148)'
+      ; GetVersionEx($1)
+      System::Call /NOUNLOAD 'kernel32::GetVersionEx(i $1) i.r0'
+      ${If} $0 <> 0
+        ; $2 = ($1)->szCSDVersion
+        System::Call /NOUNLOAD '*$1(&t20, &t128.r2)'
+        StrCpy $0 $2 13
+        ${If} $0 == "Service Pack "
+          StrCpy $2 $2 "" 13
+        ${Else}
+          StrCpy $2 0
+        ${EndIf}
+      ${EndIf}
     ${EndIf}
     System::Free $1
   ${EndIf}