On Thu, Apr 08, 2021 at 10:57:05AM +0200, Tim Wiederhake wrote:
Convenience function to return the value of an integer XML attribute.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com> --- src/libvirt_private.syms | 1 + src/util/virxml.c | 51 ++++++++++++++++++++++++++++++++++++++++ src/util/virxml.h | 6 +++++ 3 files changed, 58 insertions(+)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 776387e6b3..bdb63349ee 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -3544,6 +3544,7 @@ virXMLNodeSanitizeNamespaces; virXMLNodeToString; virXMLParseHelper; virXMLPickShellSafeComment; +virXMLPropInt; virXMLPropString; virXMLPropStringLimit; virXMLPropTristateBool; diff --git a/src/util/virxml.c b/src/util/virxml.c index f62c5c39c4..807cb7dae9 100644 --- a/src/util/virxml.c +++ b/src/util/virxml.c @@ -656,6 +656,57 @@ virXMLPropTristateSwitch(xmlNodePtr node, const char* name, }
+/** + * virXMLPropInt: + * @node: XML dom node pointer + * @name: Name of the property (attribute) to get + * @base: Number base, see strtol + * @flags: Bitwise or of virXMLPropFlags + * @result: The returned value + * + * Convenience function to return value of an integer 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 +virXMLPropInt(xmlNodePtr node, const char *name, int base, + virXMLPropFlags flags, int *result) +{ + g_autofree char *tmp = NULL; + int ret; + + 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; + } + + ret = virStrToLong_i(tmp, NULL, base, result); + + if ((ret < 0) || ((flags & VIR_XML_PROP_NONZERO) && (*result == 0))) { + virReportError(VIR_ERR_XML_ERROR, + _("Invalid value for attribute '%s' in element '%s': '%s'. Expected integer value"), + name, node->name, tmp); + return -1; + }
0 is an integer value, so this message is not especially helpful in the case VIR_XML_PROP_NONZERO is set. Separate the two tests and give them separate error messages which are more directly relevant. "Unable to parse '%s' for property '%s' as an integer value" "Zero is not a permitted value for property '%s'" Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|