From: Andrea Zagli <azagli@libero.it>
Date: Thu, 23 Jul 2020 09:17:31 +0000 (+0200)
Subject: Added function Xml::filter.
X-Git-Url: https://saetta.ns0.it/gitweb?a=commitdiff_plain;h=bb8cd223f38e9e01d6a2c5fc04f25ee6fc6e9698;p=libzakutilsjsonxml

Added function Xml::filter.
---

diff --git a/src/xml.c b/src/xml.c
index 9af3cc7..0420cac 100644
--- a/src/xml.c
+++ b/src/xml.c
@@ -21,3 +21,32 @@
 #endif
 
 #include "xml.h"
+
+xmlNodeSet
+*zak_utils_xml_filter (xmlDoc *xdoc, xmlNode *xnode, const xmlChar *filter)
+{
+	xmlXPathContextPtr xpcontext;
+	xmlXPathObjectPtr xpresult;
+	xmlNodeSet *xnodeset;
+
+	xpcontext = xmlXPathNewContext (xdoc);
+	if (xnode != NULL)
+		{
+			xpcontext->node = xnode;
+		}
+	else
+		{
+			xpcontext->node = xmlDocGetRootElement (xdoc);
+		}
+	xpresult = xmlXPathEvalExpression (filter, xpcontext);
+	if (!xmlXPathNodeSetIsEmpty (xpresult->nodesetval))
+		{
+			xnodeset = xpresult->nodesetval;
+		}
+	else
+		{
+			xnodeset = NULL;
+		}
+
+	return xnodeset;
+}
diff --git a/src/xml.h b/src/xml.h
index 2b51e07..bbf9499 100644
--- a/src/xml.h
+++ b/src/xml.h
@@ -24,11 +24,13 @@
 #include <glib-object.h>
 #include <gio/gio.h>
 #include <libxml/tree.h>
+#include <libxml/xpath.h>
 
 
 G_BEGIN_DECLS
 
 
+xmlNodeSet *zak_utils_xml_filter (xmlDoc *xdoc, xmlNode *xnode, const xmlChar *filter);
 
 
 G_END_DECLS