[libvirt] [libvirt-glib 10/37] Add gvir_config_genum_get_nick helper

[Christophe Fergeau]

We will often need to convert from an enum to its string
representation, add an helper for that to avoid duplicating that
code.
---
 libvirt-gconfig/libvirt-gconfig-clock.c           |   15 ++++++---------
 libvirt-gconfig/libvirt-gconfig-helpers-private.h |    1 +
 libvirt-gconfig/libvirt-gconfig-helpers.c         |   17 +++++++++++++++++
 3 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/libvirt-gconfig/libvirt-gconfig-clock.c b/libvirt-gconfig/libvirt-gconfig-clock.c
index dc7932d..3deb725 100644
--- a/libvirt-gconfig/libvirt-gconfig-clock.c
+++ b/libvirt-gconfig/libvirt-gconfig-clock.c
@@ -27,6 +27,7 @@
 #include <libxml/tree.h>
 
 #include "libvirt-gconfig/libvirt-gconfig.h"
+#include "libvirt-gconfig/libvirt-gconfig-helpers-private.h"
 
 extern gboolean debugFlag;
 
@@ -84,20 +85,16 @@ GVirConfigClock *gvir_config_clock_new_from_xml(const gchar *xml,
 void gvir_config_clock_set_offset(GVirConfigClock *klock,
                                   GVirConfigClockOffset offset)
 {
-    GEnumClass *enum_class;
-    GEnumValue *enum_value;
     xmlNodePtr node;
+    const char *offset_str;
 
     node = gvir_config_object_get_xml_node(GVIR_CONFIG_OBJECT(klock));
     if (node == NULL)
         return;
-    enum_class = g_type_class_ref(GVIR_TYPE_CONFIG_CLOCK_OFFSET);
-    enum_value = g_enum_get_value(enum_class, offset);
-    if (enum_value != NULL)
-        xmlNewProp(node, (xmlChar*)"offset", (xmlChar*)enum_value->value_nick);
-
-    g_type_class_unref(enum_class);
-
+    offset_str = gvir_config_genum_get_nick(GVIR_TYPE_CONFIG_CLOCK_OFFSET,
+                                             offset);
+    if (offset_str != NULL)
+        xmlNewProp(node, (xmlChar*)"offset", (xmlChar*)offset_str);
 }
 
 void gvir_config_clock_set_timezone(GVirConfigClock *klock,
diff --git a/libvirt-gconfig/libvirt-gconfig-helpers-private.h b/libvirt-gconfig/libvirt-gconfig-helpers-private.h
index c7a5d6a..59efd24 100644
--- a/libvirt-gconfig/libvirt-gconfig-helpers-private.h
+++ b/libvirt-gconfig/libvirt-gconfig-helpers-private.h
@@ -40,6 +40,7 @@ xmlChar * gvir_config_xml_get_child_element_content (xmlNode    *node,
                                                      const char *child_name);
 char *gvir_config_xml_get_child_element_content_glib (xmlNode    *node,
                                                       const char *child_name);
+const char *gvir_config_genum_get_nick (GType enum_type, gint value);
 G_END_DECLS
 
 #endif /* __LIBVIRT_GCONFIG_HELPERS_PRIVATE_H__ */
diff --git a/libvirt-gconfig/libvirt-gconfig-helpers.c b/libvirt-gconfig/libvirt-gconfig-helpers.c
index 2e28429..d069714 100644
--- a/libvirt-gconfig/libvirt-gconfig-helpers.c
+++ b/libvirt-gconfig/libvirt-gconfig-helpers.c
@@ -178,3 +178,20 @@ gvir_config_xml_get_child_element_content_glib (xmlNode    *node,
 
         return copy;
 }
+
+const char *gvir_config_genum_get_nick (GType enum_type, gint value)
+{
+    GEnumClass *enum_class;
+    GEnumValue *enum_value;
+
+    g_return_val_if_fail (G_TYPE_IS_ENUM (enum_type), NULL);
+
+    enum_class = g_type_class_ref(enum_type);
+    enum_value = g_enum_get_value(enum_class, value);
+    g_type_class_unref(enum_class);
+
+    if (enum_value != NULL)
+        return enum_value->value_nick;
+
+    return NULL;
+}
-- 
1.7.7