:Merge remote-tracking branch 'upstream/master'

6 files changed, 126 insertions, 38 deletions

diff --git a/Makefile b/Makefile
index d351e0f..457dd23 100644
--- a/Makefile
+++ b/Makefile
@@ -30,7 +30,7 @@ all: $(EXECUTABLE)
 
 ifeq ($(config),coverage)
 test: $(EXECUTABLE)
-	@find $(BUILD) -name '*.gcda' | xargs rm
+	@find $(BUILD) -name '*.gcda' | xargs -r rm
 	./$(EXECUTABLE)
 	@gcov -b -c $(BUILD)/src/pugixml.cpp.gcda | sed -e '/./{H;$!d;}' -e 'x;/pugixml.cpp/!d;'
 	@ls *.gcov | grep -v pugixml.cpp.gcov | xargs rm
@@ -51,4 +51,4 @@ $(BUILD)/%.o: %
 
 -include $(OBJECTS:.o=.d)
 
-.PHONY: all test clean	
\ No newline at end of file
+.PHONY: all test clean	
diff --git a/src/pugixml.cpp b/src/pugixml.cpp
index 47aba28..1d390eb 100644
--- a/src/pugixml.cpp
+++ b/src/pugixml.cpp
@@ -1352,7 +1352,11 @@ PUGI__NS_BEGIN
 			char_t* buffer = static_cast<char_t*>(xml_memory::allocate((length + 1) * sizeof(char_t)));
 			if (!buffer) return false;
 
-			memcpy(buffer, contents, length * sizeof(char_t));
+			if (contents)
+				memcpy(buffer, contents, length * sizeof(char_t));
+			else
+				assert(length == 0);
+
 			buffer[length] = 0;
 
 			out_buffer = buffer;
@@ -7769,6 +7773,8 @@ PUGI__NS_BEGIN
 
 		void append(const xpath_node* begin_, const xpath_node* end_, xpath_allocator* alloc)
 		{
+			if (begin_ == end_) return;
+
 			size_t size_ = static_cast<size_t>(_end - _begin);
 			size_t capacity = static_cast<size_t>(_eos - _begin);
 			size_t count = static_cast<size_t>(end_ - begin_);
@@ -8502,44 +8508,59 @@ PUGI__NS_BEGIN
 			}
 		}
 
-		static void apply_predicate(xpath_node_set_raw& ns, size_t first, xpath_ast_node* expr, const xpath_stack& stack, bool once)
+		static void apply_predicate_boolean(xpath_node_set_raw& ns, size_t first, xpath_ast_node* expr, const xpath_stack& stack, bool once)
 		{
 			assert(ns.size() >= first);
+			assert(expr->rettype() != xpath_type_number);
 
 			size_t i = 1;
 			size_t size = ns.size() - first;
-				
+
 			xpath_node* last = ns.begin() + first;
 
 			// remove_if... or well, sort of
 			for (xpath_node* it = last; it != ns.end(); ++it, ++i)
 			{
 				xpath_context c(*it, i, size);
-			
-				if (expr->rettype() == xpath_type_number)
+
+				if (expr->eval_boolean(c, stack))
 				{
-					if (expr->eval_number(c, stack) == i)
-					{
-						*last++ = *it;
+					*last++ = *it;
 
-						if (once) break;
-					}
+					if (once) break;
 				}
-				else
+			}
+
+			ns.truncate(last);
+		}
+
+		static void apply_predicate_number(xpath_node_set_raw& ns, size_t first, xpath_ast_node* expr, const xpath_stack& stack, bool once)
+		{
+			assert(ns.size() >= first);
+			assert(expr->rettype() == xpath_type_number);
+
+			size_t i = 1;
+			size_t size = ns.size() - first;
+
+			xpath_node* last = ns.begin() + first;
+
+			// remove_if... or well, sort of
+			for (xpath_node* it = last; it != ns.end(); ++it, ++i)
+			{
+				xpath_context c(*it, i, size);
+
+				if (expr->eval_number(c, stack) == i)
 				{
-					if (expr->eval_boolean(c, stack))
-					{
-						*last++ = *it;
+					*last++ = *it;
 
-						if (once) break;
-					}
+					if (once) break;
 				}
 			}
-			
+
 			ns.truncate(last);
 		}
 
-		static void apply_predicate_const(xpath_node_set_raw& ns, size_t first, xpath_ast_node* expr, const xpath_stack& stack)
+		static void apply_predicate_number_const(xpath_node_set_raw& ns, size_t first, xpath_ast_node* expr, const xpath_stack& stack)
 		{
 			assert(ns.size() >= first);
 			assert(expr->rettype() == xpath_type_number);
@@ -8567,21 +8588,28 @@ PUGI__NS_BEGIN
 			ns.truncate(last);
 		}
 
+		void apply_predicate(xpath_node_set_raw& ns, size_t first, const xpath_stack& stack, bool once)
+		{
+			if (ns.size() == first) return;
+
+			assert(_type == ast_filter || _type == ast_predicate);
+
+			if (_test == predicate_constant || _test == predicate_constant_one)
+				apply_predicate_number_const(ns, first, _right, stack);
+			else if (_right->rettype() == xpath_type_number)
+				apply_predicate_number(ns, first, _right, stack, once);
+			else
+				apply_predicate_boolean(ns, first, _right, stack, once);
+		}
+
 		void apply_predicates(xpath_node_set_raw& ns, size_t first, const xpath_stack& stack, nodeset_eval_t eval)
 		{
 			if (ns.size() == first) return;
-			
+
 			bool last_once = eval_once(ns.type() == xpath_node_set::type_sorted, eval);
 
 			for (xpath_ast_node* pred = _right; pred; pred = pred->_next)
-			{
-				assert(pred->_type == ast_predicate);
-
-				if (pred->_test == predicate_constant || pred->_test == predicate_constant_one)
-					apply_predicate_const(ns, first, pred->_right, stack);
-				else
-					apply_predicate(ns, first, pred->_right, stack, !pred->_next && last_once);
-			}
+				pred->apply_predicate(ns, first, stack, !pred->_next && last_once);
 		}
 
 		bool step_push(xpath_node_set_raw& ns, xml_attribute_struct* a, xml_node_struct* parent, xpath_allocator* alloc)
@@ -9659,16 +9687,9 @@ PUGI__NS_BEGIN
 				// either expression is a number or it contains position() call; sort by document order
 				if (_test != predicate_posinv) set.sort_do();
 
-				if (_test == predicate_constant || _test == predicate_constant_one)
-				{
-					apply_predicate_const(set, 0, _right, stack);
-				}
-				else
-				{
-					bool once = eval_once(set.type() == xpath_node_set::type_sorted, eval);
+				bool once = eval_once(set.type() == xpath_node_set::type_sorted, eval);
 
-					apply_predicate(set, 0, _right, stack, once);
-				}
+				apply_predicate(set, 0, stack, once);
 			
 				return set;
 			}
diff --git a/tests/test_document.cpp b/tests/test_document.cpp
index 2cc39a6..2774a07 100644
--- a/tests/test_document.cpp
+++ b/tests/test_document.cpp
@@ -301,6 +301,10 @@ TEST(document_load_file_error)
 
 	CHECK(doc.load_file("filedoesnotexist").status == status_file_not_found);
 
+#ifndef _WIN32
+	CHECK(doc.load_file("/dev/tty").status == status_io_error);
+#endif
+
 	test_runner::_memory_fail_threshold = 1;
 	CHECK(doc.load_file("tests/data/small.xml").status == status_out_of_memory);
 }
diff --git a/tests/test_dom_modify.cpp b/tests/test_dom_modify.cpp
index 07fe6dc..45cf3ea 100644
--- a/tests/test_dom_modify.cpp
+++ b/tests/test_dom_modify.cpp
@@ -1091,6 +1091,19 @@ TEST_XML(dom_node_append_buffer_fragment, "<node />")
 	CHECK_NODE(doc, STR("<node>1234</node>"));
 }
 
+TEST_XML(dom_node_append_buffer_empty, "<node />")
+{
+	xml_node node = doc.child(STR("node"));
+
+	CHECK(node.append_buffer("", 0).status == status_no_document_element);
+	CHECK(node.append_buffer("", 0, parse_fragment).status == status_ok);
+
+	CHECK(node.append_buffer(0, 0).status == status_no_document_element);
+	CHECK(node.append_buffer(0, 0, parse_fragment).status == status_ok);
+
+	CHECK_NODE(doc, STR("<node />"));
+}
+
 TEST_XML(dom_node_prepend_move, "<node>foo<child/></node>")
 {
 	xml_node child = doc.child(STR("node")).child(STR("child"));
diff --git a/tests/test_xpath_operators.cpp b/tests/test_xpath_operators.cpp
index c028224..57e3755 100644
--- a/tests/test_xpath_operators.cpp
+++ b/tests/test_xpath_operators.cpp
@@ -481,4 +481,52 @@ TEST(xpath_operators_associativity_arithmetic)
 	CHECK_XPATH_NUMBER(c, STR("1-1+1"), 1);
 }
 
+TEST(xpath_operators_mod)
+{
+	// Check that mod operator conforms to Java spec (since this is the only concrete source of information about XPath mod)
+	xml_node c;
+
+	// Basic tests from spec
+	CHECK_XPATH_NUMBER(c, STR("5 mod 3"), 2);
+	CHECK_XPATH_NUMBER(c, STR("5 mod -3"), 2);
+	CHECK_XPATH_NUMBER(c, STR("-5 mod 3"), -2);
+	CHECK_XPATH_NUMBER(c, STR("-5 mod -3"), -2);
+
+	// If either operand is NaN, the result is NaN
+	CHECK_XPATH_NUMBER_NAN(c, STR("(0 div 0) mod 3"));
+	CHECK_XPATH_NUMBER_NAN(c, STR("3 mod (0 div 0)"));
+	CHECK_XPATH_NUMBER_NAN(c, STR("(0 div 0) mod (0 div 0)"));
+
+	// If the dividend is an infinity, or the divisor is a zero, or both, the result is NaN
+	CHECK_XPATH_NUMBER_NAN(c, STR("(1 div 0) mod 3"));
+	CHECK_XPATH_NUMBER_NAN(c, STR("(1 div 0) mod -3"));
+	CHECK_XPATH_NUMBER_NAN(c, STR("(-1 div 0) mod 3"));
+	CHECK_XPATH_NUMBER_NAN(c, STR("1 mod 0"));
+	CHECK_XPATH_NUMBER_NAN(c, STR("-1 mod 0"));
+	CHECK_XPATH_NUMBER_NAN(c, STR("(1 div 0) mod 0"));
+	CHECK_XPATH_NUMBER_NAN(c, STR("(-1 div 0) mod 0"));
+
+	// If the dividend is finite and the divisor is an infinity, the result equals the dividend
+	CHECK_XPATH_NUMBER(c, STR("1 mod (1 div 0)"), 1);
+	CHECK_XPATH_NUMBER(c, STR("1 mod (-1 div 0)"), 1);
+	CHECK_XPATH_NUMBER(c, STR("-1 mod (1 div 0)"), -1);
+	CHECK_XPATH_NUMBER(c, STR("0 mod (1 div 0)"), 0);
+	CHECK_XPATH_NUMBER(c, STR("0 mod (-1 div 0)"), 0);
+	CHECK_XPATH_NUMBER(c, STR("100000 mod (1 div 0)"), 100000);
+
+	// If the dividend is a zero and the divisor is finite, the result equals the dividend.
+	CHECK_XPATH_NUMBER(c, STR("0 mod 1000000"), 0);
+	CHECK_XPATH_NUMBER(c, STR("0 mod -1000000"), 0);
+
+	// In the remaining cases ...  the floating-point remainder r from the division of a dividend n by a divisor d
+	// is defined by the mathematical relation r = n - (d * q) where q is an integer that is negative only if n/d is
+	// negative and positive only if n/d is positive, and whose magnitude is as large as possible without exceeding the magnitude of the true
+	// mathematical quotient of n and d.
+	CHECK_XPATH_NUMBER(c, STR("9007199254740991 mod 2"), 1);
+	CHECK_XPATH_NUMBER(c, STR("9007199254740991 mod 3"), 1);
+	CHECK_XPATH_NUMBER(c, STR("18446744073709551615 mod 2"), 0);
+	CHECK_XPATH_NUMBER(c, STR("18446744073709551615 mod 3"), 1);
+	CHECK_XPATH_NUMBER(c, STR("115792089237316195423570985008687907853269984665640564039457584007913129639935 mod 2"), 0);
+	CHECK_XPATH_NUMBER(c, STR("115792089237316195423570985008687907853269984665640564039457584007913129639935 mod 3"), 1);
+}
 #endif
diff --git a/tests/test_xpath_paths.cpp b/tests/test_xpath_paths.cpp
index df0dfa4..e51a395 100644
--- a/tests/test_xpath_paths.cpp
+++ b/tests/test_xpath_paths.cpp
@@ -664,6 +664,8 @@ TEST_XML(xpath_paths_optimize_step_once, "<node><para1><para2/><para3/><para4><p
 
     CHECK_XPATH_BOOLEAN(doc, STR("//para5/ancestor-or-self::*"), true);
     CHECK_XPATH_BOOLEAN(doc, STR("//para5/ancestor::*"), true);
+
+    CHECK_XPATH_BOOLEAN(doc, STR("//@attr5/ancestor-or-self::node()"), true);
 }
 
 TEST_XML(xpath_paths_null_nodeset_entries, "<node attr='value'/>")