[PATCH 4/8] conf: Extract UUID parsing into its own function

[Martin Kletzander <mkletzan@xxxxxxxxxx>]

Create virDomainDefParseUUID that parses only the UUID from XML
definition.  This will be used in future patch(es).

Signed-off-by: Martin Kletzander <mkletzan@xxxxxxxxxx>
---
 src/conf/domain_conf.c | 64 +++++++++++++++++++++++++++++++++++---------------
 1 file changed, 45 insertions(+), 19 deletions(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 0aea59f37a13..9bce34b73905 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -14760,6 +14760,49 @@ virDomainVcpuParse(virDomainDefPtr def,
     return ret;
 }

+/*
+ * Parse domain's UUID, optionally generating it if missing.
+ */
+static int
+virDomainDefParseUUID(virDomainDefPtr def,
+                      xmlXPathContextPtr ctxt,
+                      bool required,
+                      bool *generated)
+{
+    char *tmp = virXPathString("string(./uuid[1])", ctxt);
+
+    if (generated)
+        *generated = false;
+
+    if (tmp) {
+        if (virUUIDParse(tmp, def->uuid) < 0) {
+            virReportError(VIR_ERR_INTERNAL_ERROR,
+                           "%s", _("malformed uuid element"));
+            VIR_FREE(tmp);
+            return -1;
+        }
+        VIR_FREE(tmp);
+        return 0;
+    }
+
+    if (required) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("Missing required UUID"));
+        return -1;
+    }
+
+    if (virUUIDGenerate(def->uuid)) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       "%s", _("Failed to generate UUID"));
+        return -1;
+    }
+
+    if (generated)
+        *generated = true;
+
+    return 0;
+}
+
 static int
 virDomainDefParseName(virDomainDefPtr def,
                       xmlXPathContextPtr ctxt)
@@ -14901,25 +14944,8 @@ virDomainDefParseXML(xmlDocPtr xml,
     if (virDomainDefParseName(def, ctxt) < 0)
         goto error;

-    /* Extract domain uuid. If both uuid and sysinfo/system/entry/uuid
-     * exist, they must match; and if only the latter exists, it can
-     * also serve as the uuid. */
-    tmp = virXPathString("string(./uuid[1])", ctxt);
-    if (!tmp) {
-        if (virUUIDGenerate(def->uuid)) {
-            virReportError(VIR_ERR_INTERNAL_ERROR,
-                           "%s", _("Failed to generate UUID"));
-            goto error;
-        }
-        uuid_generated = true;
-    } else {
-        if (virUUIDParse(tmp, def->uuid) < 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR,
-                           "%s", _("malformed uuid element"));
-            goto error;
-        }
-        VIR_FREE(tmp);
-    }
+    if (virDomainDefParseUUID(def, ctxt, false, &uuid_generated) < 0)
+        goto error;

     /* Extract short description of domain (title) */
     def->title = virXPathString("string(./title[1])", ctxt);
-- 
2.6.3

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