[libvirt PATCH v5 2/8] virxml: Add virXMLPropTristateSwitch
Convenience function to return the value of an on / off XML attribute.
Signed-off-by: Tim Wiederhake <twiederh(a)redhat.com>
---
src/libvirt_private.syms | 1 +
src/util/virxml.c | 49 ++++++++++++++++++++++++++++++++++++++++
src/util/virxml.h | 4 ++++
3 files changed, 54 insertions(+)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 1aac0de1ae..776387e6b3 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -3547,6 +3547,7 @@ virXMLPickShellSafeComment;
virXMLPropString;
virXMLPropStringLimit;
virXMLPropTristateBool;
+virXMLPropTristateSwitch;
virXMLSaveFile;
virXMLValidateAgainstSchema;
virXMLValidatorFree;
diff --git a/src/util/virxml.c b/src/util/virxml.c
index 0b822d7c4d..f62c5c39c4 100644
--- a/src/util/virxml.c
+++ b/src/util/virxml.c
@@ -607,6 +607,55 @@ virXMLPropTristateBool(xmlNodePtr node, const char* name,
}
+/**
+ * virXMLPropTristateSwitch:
+ * @node: XML dom node pointer
+ * @name: Name of the property (attribute) to get
+ * @flags: Bitwise or of virXMLPropFlags
+ * @result: The returned value
+ *
+ * Convenience function to return value of an on / off attribute.
+ *
+ * Returns 1 in case of success in which case @result is set,
+ * or 0 if the attribute is not present,
+ * or -1 and reports an error on failure.
+ */
+int
+virXMLPropTristateSwitch(xmlNodePtr node, const char* name,
+ virXMLPropFlags flags, virTristateSwitch *result)
+{
+ g_autofree char *tmp = NULL;
+ int val;
+
+ if (!node || !name || !result) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Invalid argument to %s"),
+ __FUNCTION__);
+ return -1;
+ }
+
+ if (!(tmp = virXMLPropString(node, name))) {
+ if ((flags & VIR_XML_PROP_REQUIRED) != VIR_XML_PROP_REQUIRED)
+ return 0;
+
+ virReportError(VIR_ERR_XML_ERROR,
+ _("Missing required attribute '%s' in element
'%s'"),
+ name, node->name);
+ return -1;
+ }
+
+ if ((val = virTristateSwitchTypeFromString(tmp)) <= 0) {
+ virReportError(VIR_ERR_XML_ERROR,
+ _("Invalid value for attribute '%s' in element
'%s': '%s'. Expected 'on' or 'off'"),
+ name, node->name, tmp);
+ return -1;
+ }
+
+ *result = val;
+ return 1;
+}
+
+
/**
* virXPathBoolean:
* @xpath: the XPath string to evaluate
diff --git a/src/util/virxml.h b/src/util/virxml.h
index 53de416a7f..a5ecfbb01a 100644
--- a/src/util/virxml.h
+++ b/src/util/virxml.h
@@ -87,6 +87,10 @@ int virXMLPropTristateBool(xmlNodePtr node,
const char *name,
virXMLPropFlags flags,
virTristateBool *result);
+int virXMLPropTristateSwitch(xmlNodePtr node,
+ const char *name,
+ virXMLPropFlags flags,
+ virTristateSwitch *result);
/* Internal function; prefer the macros below. */
xmlDocPtr virXMLParseHelper(int domcode,
--
2.26.2