Port native Python-API to 3.x

With this change, liblldb is 95% of the way towards being able
to work under both Python 2.x and Python 3.x.  This should
introduce no functional change for Python 2.x, but for Python
3.x there are some important changes.  Primarily, these are:

1) PyString doesn't exist in Python 3.  Everything is a PyUnicode.
   To account for this, PythonString now stores a PyBytes instead
   of a PyString.  In Python 2, this is equivalent to a PyUnicode,
   and in Python 3, we do a conversion from PyUnicode to PyBytes
   and store the PyBytes.
2) PyInt doesn't exist in Python 3.  Everything is a PyLong.  To
   account for this, PythonInteger stores a PyLong instead of a
   PyInt.  In Python 2.x, this requires doing a conversion to
   PyLong when creating a PythonInteger from a PyInt.  In 3.x,
   there is no PyInt anyway, so we can assume everything is a
   PyLong.
3) PyFile_FromFile doesn't exist in Python 3.  Instead there is a
   PyFile_FromFd.  This is not addressed in this patch because it
   will require quite a large change to plumb fd's all the way
   through the system into the ScriptInterpreter.  This is the only
   remaining piece of the puzzle to get LLDB supporting Python 3.x.

Being able to run the test suite is not addressed in this patch.
After the extension module can compile and you can enter an embedded
3.x interpreter, the test suite will be addressed in a followup.

llvm-svn: 249886

lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.h

@@ -156,7 +156,7 @@ enum class PyObjectType
     protected:
         PyObject* m_py_obj;
     };
-    
+
     class PythonString: public PythonObject
     {
     public:
@@ -167,6 +167,8 @@ enum class PyObjectType
         PythonString (const char *string);
         virtual ~PythonString ();
 
+        static bool Check(PyObject *py_obj);
+
         virtual bool
         Reset (PyObject* py_obj = NULL);
 
@@ -180,7 +182,7 @@ enum class PyObjectType
 
         StructuredData::StringSP CreateStructuredString() const;
     };
-    
+
     class PythonInteger: public PythonObject
     {
     public:
@@ -190,7 +192,9 @@ enum class PyObjectType
         PythonInteger (const PythonObject &object);
         PythonInteger (int64_t value);
         virtual ~PythonInteger ();
-        
+
+        static bool Check(PyObject *py_obj);
+
         virtual bool
         Reset (PyObject* py_obj = NULL);
 
@@ -205,13 +209,13 @@ enum class PyObjectType
     class PythonList: public PythonObject
     {
     public:
-        
-        PythonList (bool create_empty);
+      PythonList();
         PythonList (PyObject* py_obj);
         PythonList (const PythonObject &object);
-        PythonList (uint32_t count);
         virtual ~PythonList ();
-        
+
+        static bool Check(PyObject *py_obj);
+
         virtual bool
         Reset (PyObject* py_obj = NULL);
 
@@ -231,12 +235,13 @@ enum class PyObjectType
     class PythonDictionary: public PythonObject
     {
     public:
-        
-        explicit PythonDictionary (bool create_empty);
+      PythonDictionary();
         PythonDictionary (PyObject* object);
         PythonDictionary (const PythonObject &object);
         virtual ~PythonDictionary ();
-        
+
+        static bool Check(PyObject *py_obj);
+
         virtual bool
         Reset (PyObject* object = NULL);