[PATCH 10/21] Refactoring virDomainControllerDefParseXML() to use XPath

[Kristina Hanicova <khanicov@xxxxxxxxxx>]

Signed-off-by: Kristina Hanicova <khanicov@xxxxxxxxxx>
---
 src/conf/domain_conf.c | 69 ++++++++++++++++++------------------------
 1 file changed, 29 insertions(+), 40 deletions(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 2af3ec6ec3..69f25c30a8 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -9844,9 +9844,7 @@ virDomainControllerDefParseXML(virDomainXMLOption *xmlopt,
 {
     g_autoptr(virDomainControllerDef) def = NULL;
     int type = 0;
-    xmlNodePtr cur = NULL;
-    bool processedModel = false;
-    bool processedTarget = false;
+    xmlNodePtr driver = NULL;
     int numaNode = -1;
     int ports = -1;
     VIR_XPATH_NODE_AUTORESTORE(ctxt)
@@ -9903,45 +9901,36 @@ virDomainControllerDefParseXML(virDomainXMLOption *xmlopt,
         def->idx = idxVal;
     }
 
-    cur = node->children;
-    while (cur != NULL) {
-        if (cur->type == XML_ELEMENT_NODE) {
-            if (virXMLNodeNameEqual(cur, "driver")) {
-                queues = virXMLPropString(cur, "queues");
-                cmd_per_lun = virXMLPropString(cur, "cmd_per_lun");
-                max_sectors = virXMLPropString(cur, "max_sectors");
-                ioeventfd = virXMLPropString(cur, "ioeventfd");
-                iothread = virXMLPropString(cur, "iothread");
+    if ((driver = virXPathNode("./driver", ctxt)) &&
+        (virDomainVirtioOptionsParseXML(driver, &def->virtio) < 0))
+        return NULL;
 
-                if (virDomainVirtioOptionsParseXML(cur, &def->virtio) < 0)
-                    return NULL;
-            } else if (virXMLNodeNameEqual(cur, "model")) {
-                if (processedModel) {
-                    virReportError(VIR_ERR_XML_ERROR, "%s",
-                                   _("Multiple <model> elements in "
-                                     "controller definition not allowed"));
-                    return NULL;
-                }
-                modelName = virXMLPropString(cur, "name");
-                processedModel = true;
-            } else if (virXMLNodeNameEqual(cur, "target")) {
-                if (processedTarget) {
-                    virReportError(VIR_ERR_XML_ERROR, "%s",
-                                   _("Multiple <target> elements in "
-                                     "controller definition not allowed"));
-                    return NULL;
-                }
-                chassisNr = virXMLPropString(cur, "chassisNr");
-                chassis = virXMLPropString(cur, "chassis");
-                port = virXMLPropString(cur, "port");
-                busNr = virXMLPropString(cur, "busNr");
-                hotplug = virXMLPropString(cur, "hotplug");
-                targetIndex = virXMLPropString(cur, "index");
-                processedTarget = true;
-            }
-        }
-        cur = cur->next;
+    queues = virXPathString("string(./driver/@queues)", ctxt);
+    cmd_per_lun = virXPathString("string(./driver/@cmd_per_lun)", ctxt);
+    max_sectors = virXPathString("string(./driver/@max_sectors)", ctxt);
+    ioeventfd = virXPathString("string(./driver/@ioeventfd)", ctxt);
+    iothread = virXPathString("string(./driver/@iothread)", ctxt);
+
+    if (virXPathBoolean("boolean(count(./model) > 1)", ctxt)) {
+        virReportError(VIR_ERR_XML_ERROR, "%s",
+                       _("Multiple <model> elements in "
+                         "controller definition not allowed"));
+        return NULL;
+    }
+    modelName = virXPathString("string(./model/@name)", ctxt);
+
+    if (virXPathBoolean("boolean(count(./target) > 1)", ctxt)) {
+        virReportError(VIR_ERR_XML_ERROR, "%s",
+                       _("Multiple <target> elements in "
+                         "controller definition not allowed"));
+        return NULL;
     }
+    chassisNr = virXPathString("string(./target/@chassisNr)", ctxt);
+    chassis = virXPathString("string(./target/@chassis)", ctxt);
+    port = virXPathString("string(./target/@port)", ctxt);
+    busNr = virXPathString("string(./target/@busNr)", ctxt);
+    hotplug = virXPathString("string(./target/@hotplug)", ctxt);
+    targetIndex = virXPathString("string(./target/@targetIndex)", ctxt);
 
     /* node is parsed differently from target attributes because
      * someone thought it should be a subelement instead...
-- 
2.30.2