From c3e9780d223786acf838f2824b19104b4bd707cc Mon Sep 17 00:00:00 2001
From: Alistair Leslie-Hughes <leslie_alistair@hotmail.com>
Date: Sun, 20 Apr 2008 00:09:58 +1000
Subject: [PATCH] msxml3: Corrected IXMLDOMComment appendData with a broken
 xmlTextConcat function.

---
 dlls/msxml3/comment.c | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/dlls/msxml3/comment.c b/dlls/msxml3/comment.c
index c4d37f2ddcb..eb273b4b40f 100644
--- a/dlls/msxml3/comment.c
+++ b/dlls/msxml3/comment.c
@@ -597,10 +597,32 @@ static HRESULT WINAPI domcomment_appendData(
     pContent = xmlChar_from_wchar( (WCHAR*)p );
     if(pContent)
     {
+        /* Older versions of libxml < 2.6.27 didn't correctly support
+           xmlTextConcat on Comment nodes. Fallback to setting the
+           contents directly if xmlTextConcat fails.
+
+           NOTE: if xmlTextConcat fails, pContent is destroyed.
+         */
         if(xmlTextConcat(pDOMNode->node, pContent, SysStringLen(p) ) == 0)
             hr = S_OK;
         else
-            hr = E_FAIL;
+        {
+            xmlChar *pNew;
+            pContent = xmlChar_from_wchar( (WCHAR*)p );
+            if(pContent)
+            {
+                pNew = xmlStrcat(xmlNodeGetContent(pDOMNode->node), pContent);
+                if(pNew)
+                {
+                    xmlNodeSetContent(pDOMNode->node, pNew);
+                    hr = S_OK;
+                }
+                else
+                    hr = E_FAIL;
+            }
+            else
+                hr = E_FAIL;
+        }
     }
     else
         hr = E_FAIL;
-- 
2.11.4.GIT