[xml] xmlSplitQName2 problem and patch

[Aleksey Sanin <aleksey aleksey com>]

Daniel,

I think I found a small problem with xmlSplitQName2() function and I would
lake to confirm with you that this is actually a bug. The 
xmlSplitQName2() function
returns NULL when QName does not have a prefix and this sounds wrong to me.
Prefix in QName is optional and a QName with Local Part only (for 
example, "foo") is
a valid QName. The xmlSplitQName2() function in this case should just 
return
the Local Part and set prefix to NULL.

Thanks,
Aleksey

Index: tree.c
===================================================================
RCS file: /cvs/gnome/gnome-xml/tree.c,v
retrieving revision 1.305
diff -u -r1.305 tree.c
--- tree.c      11 Feb 2004 13:25:00 -0000      1.305
+++ tree.c      18 Feb 2004 00:25:28 -0000
@@ -263,9 +263,16 @@
    while ((name[len] != 0) && (name[len] != ':'))
       len++;
    
-    if (name[len] == 0)
-       return(NULL);
-
+    if (name[len] == 0) {
+       /* we don't have prefix */
+       ret = xmlStrdup(name);
+       if (ret == NULL) {
+           xmlTreeErrMemory("QName split");
+           return(NULL);
+       }
+       return(ret);
+    }
+
    *prefix = xmlStrndup(name, len);
    if (*prefix == NULL) {
       xmlTreeErrMemory("QName split");