load_buffer_impl always checks if buffer is valid pointer and size > 0

added some tests to force invalid buffer and size = 0

2 files changed, 8 insertions, 1 deletions

diff --git a/src/pugixml.cpp b/src/pugixml.cpp
index b39aad0..47aba28 100644
--- a/src/pugixml.cpp
+++ b/src/pugixml.cpp
@@ -4292,7 +4292,12 @@ PUGI__NS_BEGIN
 	PUGI__FN xml_parse_result load_buffer_impl(xml_document_struct* doc, xml_node_struct* root, void* contents, size_t size, unsigned int options, xml_encoding encoding, bool is_mutable, bool own, char_t** out_buffer)
 	{
 		// check input buffer
-		assert(contents || size == 0);
+                if ((contents==NULL) && (size!=0)) {
+                  xml_parse_result result;
+                  result.status = status_no_document_element;
+                  return result;
+                }
+
 
 		// get actual encoding
 		xml_encoding buffer_encoding = impl::get_buffer_encoding(encoding, contents, size);
diff --git a/tests/test_parse.cpp b/tests/test_parse.cpp
index c45b783..56ea049 100644
--- a/tests/test_parse.cpp
+++ b/tests/test_parse.cpp
@@ -865,6 +865,8 @@ TEST(parse_empty)
 	xml_document doc;
 	CHECK(doc.load(STR("")).status == status_no_document_element && !doc.first_child());
 	CHECK(doc.load(STR(""), parse_fragment) && !doc.first_child());
+        CHECK(doc.load_buffer(NULL, 12).status == status_no_document_element);
+        CHECK(doc.load_buffer("foo", 0).status == status_no_document_element);
 }
 
 TEST(parse_out_of_memory)