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authorStefan Hajnoczi <stefanha@redhat.com>2014-03-03 11:30:02 +0100
committerStefan Hajnoczi <stefanha@redhat.com>2014-03-13 14:23:27 +0100
commit11f590b1a242492a0108da42f40f0e2b20f0a778 (patch)
tree549ec3d3d25ecb39c2141fb914f1433c928bbb13
parentb5042a36229b4fa5eeb66bbcde78f704975aec00 (diff)
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object: add object_get_canonical_path_component()
It is often useful to find an object's child property name. Also use this new function to simplify the implementation of object_get_canonical_path(). Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
-rw-r--r--include/qom/object.h8
-rw-r--r--qom/object.c54
2 files changed, 40 insertions, 22 deletions
diff --git a/include/qom/object.h b/include/qom/object.h
index 9c7c361..4cd7704 100644
--- a/include/qom/object.h
+++ b/include/qom/object.h
@@ -974,6 +974,14 @@ const char *object_property_get_type(Object *obj, const char *name,
Object *object_get_root(void);
/**
+ * object_get_canonical_path_component:
+ *
+ * Returns: The final component in the object's canonical path. The canonical
+ * path is the path within the composition tree starting from the root.
+ */
+gchar *object_get_canonical_path_component(Object *obj);
+
+/**
* object_get_canonical_path:
*
* Returns: The canonical path for a object. This is the path within the
diff --git a/qom/object.c b/qom/object.c
index 660859c..3290375 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -1102,39 +1102,49 @@ void object_property_add_link(Object *obj, const char *name,
g_free(full_type);
}
+gchar *object_get_canonical_path_component(Object *obj)
+{
+ ObjectProperty *prop = NULL;
+
+ g_assert(obj);
+ g_assert(obj->parent != NULL);
+
+ QTAILQ_FOREACH(prop, &obj->parent->properties, node) {
+ if (!object_property_is_child(prop)) {
+ continue;
+ }
+
+ if (prop->opaque == obj) {
+ return g_strdup(prop->name);
+ }
+ }
+
+ /* obj had a parent but was not a child, should never happen */
+ g_assert_not_reached();
+ return NULL;
+}
+
gchar *object_get_canonical_path(Object *obj)
{
Object *root = object_get_root();
- char *newpath = NULL, *path = NULL;
+ char *newpath, *path = NULL;
while (obj != root) {
- ObjectProperty *prop = NULL;
-
- g_assert(obj->parent != NULL);
-
- QTAILQ_FOREACH(prop, &obj->parent->properties, node) {
- if (!object_property_is_child(prop)) {
- continue;
- }
+ char *component = object_get_canonical_path_component(obj);
- if (prop->opaque == obj) {
- if (path) {
- newpath = g_strdup_printf("%s/%s", prop->name, path);
- g_free(path);
- path = newpath;
- } else {
- path = g_strdup(prop->name);
- }
- break;
- }
+ if (path) {
+ newpath = g_strdup_printf("%s/%s", component, path);
+ g_free(component);
+ g_free(path);
+ path = newpath;
+ } else {
+ path = component;
}
- g_assert(prop != NULL);
-
obj = obj->parent;
}
- newpath = g_strdup_printf("/%s", path);
+ newpath = g_strdup_printf("/%s", path ? path : "");
g_free(path);
return newpath;