+/* Python 2.4 has this macro, older versions do not. */
+#ifndef Py_RETURN_NONE
+# define Py_RETURN_NONE return Py_INCREF(Py_None), Py_None
+#endif
+
+/* This macro is a shortcut for calls like
+ * x = PyObject_Repr(x);
+ * This can't be done like this example because this would leak
+ * a reference the the original x and crash in case of x == NULL.
+ * This calling syntax is less than elegant but it works, saves
+ * a lot of lines and avoids potential refcount errors. */
+
+#define CPY_SUBSTITUTE(func, a, ...) do {\
+ if ((a) != NULL) {\
+ PyObject *__tmp = (a);\
+ (a) = func(__VA_ARGS__);\
+ Py_DECREF(__tmp);\
+ }\
+} while(0)
+
+/* Python3 compatibility layer. To keep the actual code as clean as possible
+ * do a lot of defines here. */
+
+#if PY_MAJOR_VERSION >= 3
+#define IS_PY3K
+#endif
+
+#ifdef IS_PY3K
+
+#define PyInt_FromLong PyLong_FromLong
+#define CPY_INIT_TYPE PyVarObject_HEAD_INIT(NULL, 0)
+#define IS_BYTES_OR_UNICODE(o) (PyUnicode_Check(o) || PyBytes_Check(o))
+#define CPY_STRCAT_AND_DEL(a, b) do {\
+ CPY_STRCAT((a), (b));\
+ Py_XDECREF((b));\
+} while (0)
+static inline void CPY_STRCAT(PyObject **a, PyObject *b) {
+ PyObject *ret;
+
+ if (!a || !*a)
+ return;
+
+ ret = PyUnicode_Concat(*a, b);
+ Py_DECREF(*a);
+ *a = ret;
+}
+
+#else
+
+#define CPY_INIT_TYPE PyObject_HEAD_INIT(NULL) 0,
+#define IS_BYTES_OR_UNICODE(o) (PyUnicode_Check(o) || PyString_Check(o))
+#define CPY_STRCAT_AND_DEL PyString_ConcatAndDel
+#define CPY_STRCAT PyString_Concat
+
+#endif
+
+static inline const char *cpy_unicode_or_bytes_to_string(PyObject **o) {
+ if (PyUnicode_Check(*o)) {
+ PyObject *tmp;
+ tmp = PyUnicode_AsEncodedString(*o, NULL, NULL); /* New reference. */
+ if (tmp == NULL)
+ return NULL;
+ Py_DECREF(*o);
+ *o = tmp;
+ }
+#ifdef IS_PY3K
+ return PyBytes_AsString(*o);
+#else
+ return PyString_AsString(*o);
+#endif
+}
+
+static inline PyObject *cpy_string_to_unicode_or_bytes(const char *buf) {
+#ifdef IS_PY3K
+/* Python3 preferrs unicode */
+ PyObject *ret;
+ ret = PyUnicode_Decode(buf, strlen(buf), NULL, NULL);
+ if (ret != NULL)
+ return ret;
+ PyErr_Clear();
+ return PyBytes_FromString(buf);
+#else
+ return PyString_FromString(buf);
+#endif
+}
+
+void cpy_log_exception(const char *context);
+
+/* Python object declarations. */
+