--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xml/xmldomandxpath/src/xmlenginedom/xmlengxpathevaluationcontext_impl.cpp	Thu Dec 17 09:29:21 2009 +0200
@@ -0,0 +1,144 @@
+// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// XPath evaluation context implementation
+//
+
+#include "xmlengdomdefs.h"
+#include "xmlengxpathevaluationcontext_impl.h"
+#include <stdapis/libxml2/libxml2_globals.h>
+#include <xml/dom/xmlengnode.h>
+#include <xml/dom/xmlengnamespace.h>
+#include <xml/dom/xmlengelement.h>
+
+TUint TXmlEngXPathEvaluationContextImpl::ArgCount()
+    {
+    return iArgCount;
+    }
+
+const RXmlEngXPathResult TXmlEngXPathEvaluationContextImpl::Argument(
+    TUint aIndex )
+    {
+    XE_ASSERT_DEBUG(aIndex < iArgCount);
+    // "Peeking" a value from a XPath-expression evaluation stack
+    return RXmlEngXPathResult(iContext->valueTab[iContext->valueNr - (iArgCount - aIndex)]);
+    }
+
+const RXmlEngXPathResult TXmlEngXPathEvaluationContextImpl::Result()
+    {
+    XE_ASSERT_DEBUG(iCurrentResult);
+    if (iCurrentResult->type != XPATH_NODESET &&
+        iCurrentResult->nodesetval)
+        {
+        xmlXPathFreeNodeSet(iCurrentResult->nodesetval);
+        iCurrentResult->nodesetval = NULL;
+        }
+    if (iCurrentResult->type != XPATH_STRING && iCurrentResult->stringval)
+        {
+        xmlFree(iCurrentResult->stringval);
+        iCurrentResult->stringval = NULL;
+        }
+    return RXmlEngXPathResult(iCurrentResult);
+    }
+
+void TXmlEngXPathEvaluationContextImpl::InitializeNodeSetResult()
+    {
+    XE_ASSERT_DEBUG(iCurrentResult);
+    iCurrentResult->nodesetval = xmlXPathNodeSetCreate(NULL);
+    if(iCurrentResult->nodesetval)
+        {
+        iCurrentResult->type = XPATH_NODESET;
+        }
+    // else OOM happened and will be handled later
+    }
+
+void TXmlEngXPathEvaluationContextImpl::AppendToResult(
+    const TXmlEngNode aNode )
+    {
+    if(OOM_FLAG)
+        return; // Do nothing in OOM
+    if (aNode.NodeType() != TXmlEngNode::ENamespaceDeclaration)
+        {
+        xmlXPathNodeSetAdd(iCurrentResult->nodesetval, INTERNAL_NODEPTR(*const_cast<TXmlEngNode*>(&aNode)));
+        }
+    }
+void TXmlEngXPathEvaluationContextImpl::AppendToResult(
+    const TXmlEngNamespace aAppendedNsNode,
+    const TXmlEngElement aNsParentNode)
+    {
+    XE_ASSERT_DEBUG(iCurrentResult);
+
+    if(OOM_FLAG)
+        return; // Do nothing in OOM
+    // Add a copy of namespace node with special function
+    xmlXPathNodeSetAddNs(iCurrentResult->nodesetval,
+                         INTERNAL_NODEPTR(*const_cast<TXmlEngElement*>(&aNsParentNode)),
+                         INTERNAL_NSPTR(*const_cast<TXmlEngNamespace*>(&aAppendedNsNode)));
+    }
+
+void TXmlEngXPathEvaluationContextImpl::AppendToResult(
+    const RXmlEngNodeSet aNodeSet )
+    {
+    if(OOM_FLAG)
+        return; // Do nothing in OOM
+    xmlXPathNodeSetMerge(iCurrentResult->nodesetval, INTERNAL_NODESETPTR(aNodeSet));
+    iCurrentResult->type = XPATH_NODESET;
+    }
+
+void TXmlEngXPathEvaluationContextImpl::SetResult(
+    TReal aNumber )
+    {
+    XE_ASSERT_DEBUG(iCurrentResult);
+    iCurrentResult->type = XPATH_NUMBER;
+    iCurrentResult->floatval = aNumber;
+    }
+
+void TXmlEngXPathEvaluationContextImpl::SetResult(
+    TBool aBoolean )
+    {
+    XE_ASSERT_DEBUG(iCurrentResult);
+    iCurrentResult->type = XPATH_BOOLEAN;
+    iCurrentResult->boolval = (aBoolean != 0);
+    }
+
+void TXmlEngXPathEvaluationContextImpl::SetResultL(
+    const TDesC8& aString )
+    {
+    // Note: OOM flag is checked later (otherwise, there are two checks in the function)
+    xmlChar* copy = xmlCharFromDesC8L(aString);
+   
+    iCurrentResult->type = XPATH_STRING;
+    if(iCurrentResult->stringval)
+        xmlFree(iCurrentResult->stringval);
+    iCurrentResult->stringval = copy;
+    }
+
+// ---------------------------------------------           Impementation-specific methods
+/**
+Allocates memory for function result
+
+@return TRUE is succeeded, FALSE if OOM has happened
+*/
+TBool TXmlEngXPathEvaluationContextImpl::Initialize()
+    {
+    iCurrentResult = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
+    if(iCurrentResult)
+        memset(iCurrentResult, 0, (size_t)sizeof(xmlXPathObject));
+    iCurrentResult->type = XPATH_STRING;
+    return (TBool)iCurrentResult;
+    }
+
+void* TXmlEngXPathEvaluationContextImpl::ExtendedContext()
+    {
+    return iContext->comp->extendedContext;
+    }