Added xml_document::reset() function with document parameter

git-svn-id: http://pugixml.googlecode.com/svn/trunk@786 99668b35-9821-0410-8761-19e4c4f06640

3 files changed, 30 insertions, 0 deletions

diff --git a/src/pugixml.cpp b/src/pugixml.cpp
index 6850589..ff5aaa9 100644
--- a/src/pugixml.cpp
+++ b/src/pugixml.cpp
@@ -4505,6 +4505,14 @@ namespace pugi
 		create();
 	}
 
+    void xml_document::reset(const xml_document& proto)
+    {
+        reset();
+
+        for (xml_node cur = proto.first_child(); cur; cur = cur.next_sibling())
+            append_copy(cur);
+    }
+
 	void xml_document::create()
 	{
 		// initialize sentinel page
diff --git a/src/pugixml.hpp b/src/pugixml.hpp
index ce4abe2..bb08064 100644
--- a/src/pugixml.hpp
+++ b/src/pugixml.hpp
@@ -740,6 +740,9 @@ namespace pugi
         // Removes all nodes, leaving the empty document
 		void reset();
 
+        // Removes all nodes, then copies the entire contents of the specified document
+		void reset(const xml_document& proto);
+
 	#ifndef PUGIXML_NO_STL
 		// Load document from stream.
 		xml_parse_result load(std::basic_istream<char, std::char_traits<char> >& stream, unsigned int options = parse_default, xml_encoding encoding = encoding_auto);
diff --git a/tests/test_document.cpp b/tests/test_document.cpp
index 342d07c..8796560 100644
--- a/tests/test_document.cpp
+++ b/tests/test_document.cpp
@@ -906,3 +906,22 @@ TEST(document_reset_empty)
     CHECK(!doc.first_child());
     CHECK_NODE(doc, STR(""));
 }
+
+TEST_XML(document_reset_copy, "<node><child/></node>")
+{
+    xml_document doc2;
+
+    CHECK_NODE(doc2, STR(""));
+
+    doc2.reset(doc);
+
+    CHECK_NODE(doc2, STR("<node><child /></node>"));
+    CHECK(doc.first_child() != doc2.first_child());
+
+    doc.reset(doc2);
+
+    CHECK_NODE(doc, STR("<node><child /></node>"));
+    CHECK(doc.first_child() != doc2.first_child());
+
+    CHECK(doc.first_child().offset_debug() == -1);
+}