network_conf: Introduce virNetworkObjListPrune

The API will iterate over the list of network object and remove
desired ones from it.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>

src/conf/network_conf.c

@@ -4381,3 +4381,34 @@ virNetworkObjListNumOfNetworks(virNetworkObjListPtr nets,
 
     return count;
 }
+
+/**
+ * virNetworkObjListPrune:
+ * @nets: a list of network objects
+ * @flags: bitwise-OR of virConnectListAllNetworksFlags
+ *
+ * Iterate over list of network objects and remove the desired
+ * ones from it.
+ */
+void
+virNetworkObjListPrune(virNetworkObjListPtr nets,
+                       unsigned int flags)
+{
+    size_t i = 0;
+
+    while (i < nets->count) {
+        virNetworkObjPtr obj = nets->objs[i];
+
+        virNetworkObjLock(obj);
+
+        if (virNetworkMatch(obj, flags)) {
+            virNetworkObjUnlock(obj);
+            virNetworkObjFree(obj);
+
+            VIR_DELETE_ELEMENT(nets->objs, i, nets->count);
+        } else {
+            virNetworkObjUnlock(obj);
+            i++;
+        }
+    }
+}

src/conf/network_conf.h

@@ -464,6 +464,9 @@ int virNetworkObjListNumOfNetworks(virNetworkObjListPtr nets,
                                    virNetworkObjListFilter filter,
                                    virConnectPtr conn);
 
+void virNetworkObjListPrune(virNetworkObjListPtr nets,
+                            unsigned int flags);
+
 /* for testing */
 int
 virNetworkDefUpdateSection(virNetworkDefPtr def,

src/libvirt_private.syms

@@ -573,6 +573,7 @@ virNetworkObjListForEach;
 virNetworkObjListFree;
 virNetworkObjListGetNames;
 virNetworkObjListNumOfNetworks;
+virNetworkObjListPrune;
 virNetworkObjLock;
 virNetworkObjReplacePersistentDef;
 virNetworkObjSetDefTransient;