Fix JSON parsing of large unsigned 64-bit integers

Foundation/include/Poco/Token.h

@@ -108,11 +108,17 @@ public:
 #if defined(POCO_HAVE_INT64)
 	virtual Int64 asInteger64() const;
         /// Returns a 64-bit integer representation of the token.
+
+	virtual UInt64 asUnsignedInteger64() const;
+        /// Returns an unsigned 64-bit integer representation of the token.
 #endif
 
 	virtual int asInteger() const;
 		/// Returns an integer representation of the token.
 
+	virtual unsigned asUnsignedInteger() const;
+		/// Returns an unsigned integer representation of the token.
+
 	virtual double asFloat() const;
 		/// Returns a floating-point representation of the token.
 

Foundation/src/Token.cpp

@@ -81,6 +81,12 @@ Int64 Token::asInteger64() const
 {
 	return NumberParser::parse64(_value);
 }
+
+
+UInt64 Token::asUnsignedInteger64() const
+{
+	return NumberParser::parseUnsigned64(_value);
+}
 #endif
 
 
@@ -90,6 +96,12 @@ int Token::asInteger() const
 }
 
 
+unsigned Token::asUnsignedInteger() const
+{
+	return NumberParser::parseUnsigned(_value);
+}
+
+
 double Token::asFloat() const
 {
 	return NumberParser::parseFloat(_value);

JSON/include/Poco/JSON/DefaultHandler.h

@@ -82,9 +82,17 @@ public:
 	virtual void value(int v);
 		/// An integer value is read
 
+	virtual void value(unsigned v);
+		/// An unsigned value is read. This will only be triggered if the
+        /// value cannot fit into a signed int.
+
 #if defined(POCO_HAVE_INT64)
 	virtual void value(Int64 v);
 		/// A 64-bit integer value is read
+
+	virtual void value(UInt64 v);
+		/// An unsigned 64-bit integer value is read. This will only be
+        /// triggered if the value cannot fit into a signed 64-bit integer.
 #endif
 
 	virtual void value(const std::string& s);
@@ -120,11 +128,23 @@ inline void DefaultHandler::value(int v)
 }
 
 
+inline void DefaultHandler::value(unsigned v)
+{
+	setValue(v);
+}
+
+
 #if defined(POCO_HAVE_INT64)
 inline void DefaultHandler::value(Int64 v)
 {
 	setValue(v);
 }
+
+
+inline void DefaultHandler::value(UInt64 v)
+{
+	setValue(v);
+}
 #endif
 
 

JSON/include/Poco/JSON/Handler.h

@@ -72,9 +72,17 @@ public:
 	virtual void value(int v) = 0;
 		/// An integer value is read
 
+	virtual void value(unsigned v) = 0;
+		/// An unsigned value is read. This will only be triggered if the
+        /// value cannot fit into a signed int.
+
 #if defined(POCO_HAVE_INT64)
 	virtual void value(Int64 v) = 0;
 		/// A 64-bit integer value is read
+
+	virtual void value(UInt64 v) = 0;
+		/// An unsigned 64-bit integer value is read. This will only be
+        /// triggered if the value cannot fit into a signed 64-bit integer.
 #endif
 
 	virtual void value(const std::string& value) = 0;

JSON/src/Parser.cpp

@@ -636,6 +636,8 @@ void Parser::readValue(const Token* token)
 		if (_handler != NULL)
 		{
 #if defined(POCO_HAVE_INT64)
+            try
+            {
                 Int64 value = token->asInteger64();
                 // if number is 32-bit, then handle as such
                 if (    value > std::numeric_limits<int>::max()
@@ -647,9 +649,33 @@ void Parser::readValue(const Token* token)
                 {
                     _handler->value(static_cast<int>(value));
                 }
+            }
+            // try to handle error as unsigned in case of overflow
+            catch ( const SyntaxException& )
+            {
+                UInt64 value = token->asUnsignedInteger64();
+                // if number is 32-bit, then handle as such
+                if ( value > std::numeric_limits<unsigned>::max() )
+                {
+                    _handler->value(value);
+                }
+                else
+                {
+                    _handler->value(static_cast<unsigned>(value));
+                }
+            }
 #else
+            try
+            {
                 int value = token->asInteger();
                 _handle->value(value);
+            }
+            // try to handle error as unsigned in case of overflow
+            catch ( const SyntaxException& )
+            {
+                unsigned value = token->asUnsignedInteger();
+                _handle->value(value);
+            }
 #endif
 		}
 		break;

JSON/testsuite/src/JSONTest.cpp

@@ -192,12 +192,42 @@ void JSONTest::testNumberProperty()
 	assert(value == 1969);
 }
 
+
+void JSONTest::testUnsignedNumberProperty()
+{
+    // 4294967295 == unsigned(-1)
+	std::string json = "{ \"test\" : 4294967295 }";
+	Parser parser;
+	Var result;
+
+	try
+	{
+		DefaultHandler handler;
+		parser.setHandler(&handler);
+		parser.parse(json);
+		result = handler.result();
+	}
+	catch(JSONException& jsone)
+	{
+		std::cout << jsone.message() << std::endl;
+		assert(false);
+	}
+
+	assert(result.type() == typeid(Object::Ptr));
+
+	Object::Ptr object = result.extract<Object::Ptr>();
+	Var test = object->get("test");
+	assert(test.isInteger());
+	unsigned value = test;
+	assert(value == -1);
+}
+
 #if defined(POCO_HAVE_INT64)
 
 
 void JSONTest::testNumber64Property()
 {
-	std::string json = "{ \"test\" : 5000000000000000 }";
+	std::string json = "{ \"test\" : -5000000000000000 }";
 	Parser parser;
 	Var result;
 
@@ -220,10 +250,39 @@ void JSONTest::testNumber64Property()
 	Var test = object->get("test");
 	assert(test.isInteger());
 	Poco::Int64 value = test;
-	assert(value == 5000000000000000);
+	assert(value == -5000000000000000);
 }
 
 
+void JSONTest::testUnsignedNumber64Property()
+{
+    // 18446744073709551615 == UInt64(-1)
+	std::string json = "{ \"test\" : 18446744073709551615 }";
+	Parser parser;
+	Var result;
+
+	try
+	{
+		DefaultHandler handler;
+		parser.setHandler(&handler);
+		parser.parse(json);
+		result = handler.result();
+	}
+	catch(JSONException& jsone)
+	{
+		std::cout << jsone.message() << std::endl;
+		assert(false);
+	}
+
+	assert(result.type() == typeid(Object::Ptr));
+
+	Object::Ptr object = result.extract<Object::Ptr>();
+	Var test = object->get("test");
+	assert(test.isInteger());
+	Poco::UInt64 value = test;
+	assert(value == -1);
+}
+
 #endif
 
 
@@ -962,8 +1021,10 @@ CppUnit::Test* JSONTest::suite()
 	CppUnit_addTest(pSuite, JSONTest, testTrueProperty);
 	CppUnit_addTest(pSuite, JSONTest, testFalseProperty);
 	CppUnit_addTest(pSuite, JSONTest, testNumberProperty);
+	CppUnit_addTest(pSuite, JSONTest, testUnsignedNumberProperty);
 #if defined(POCO_HAVE_INT64)
 	CppUnit_addTest(pSuite, JSONTest, testNumber64Property);
+	CppUnit_addTest(pSuite, JSONTest, testUnsignedNumber64Property);
 #endif
 	CppUnit_addTest(pSuite, JSONTest, testStringProperty);
 	CppUnit_addTest(pSuite, JSONTest, testEmptyObject);

JSON/testsuite/src/JSONTest.h

@@ -50,8 +50,10 @@ public:
 	void testTrueProperty();
 	void testFalseProperty();
 	void testNumberProperty();
+	void testUnsignedNumberProperty();
 #if defined(POCO_HAVE_INT64)
 	void testNumber64Property();
+	void testUnsignedNumber64Property();
 #endif
 	void testStringProperty();
 	void testEmptyObject();