Recorded merge of revisions 81029 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r81029 | antoine.pitrou | 2010-05-09 16:46:46 +0200 (dim., 09 mai 2010) | 3 lines

  Untabify C files. Will watch buildbots.
........

1 files changed, 1905 insertions, 1905 deletions

diff --git a/Objects/abstract.c b/Objects/abstract.c
index cd5a9fd..5a904b4 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -12,17 +12,17 @@
 static PyObject *
 type_error(const char *msg, PyObject *obj)
 {
-	PyErr_Format(PyExc_TypeError, msg, obj->ob_type->tp_name);
-	return NULL;
+    PyErr_Format(PyExc_TypeError, msg, obj->ob_type->tp_name);
+    return NULL;
 }
 
 static PyObject *
 null_error(void)
 {
-	if (!PyErr_Occurred())
-		PyErr_SetString(PyExc_SystemError,
-				"null argument to internal routine");
-	return NULL;
+    if (!PyErr_Occurred())
+        PyErr_SetString(PyExc_SystemError,
+                        "null argument to internal routine");
+    return NULL;
 }
 
 /* Operations on any object */
@@ -30,37 +30,37 @@ null_error(void)
 PyObject *
 PyObject_Type(PyObject *o)
 {
-	PyObject *v;
+    PyObject *v;
 
-	if (o == NULL)
-		return null_error();
-	v = (PyObject *)o->ob_type;
-	Py_INCREF(v);
-	return v;
+    if (o == NULL)
+        return null_error();
+    v = (PyObject *)o->ob_type;
+    Py_INCREF(v);
+    return v;
 }
 
 Py_ssize_t
 PyObject_Size(PyObject *o)
 {
-	PySequenceMethods *m;
+    PySequenceMethods *m;
 
-	if (o == NULL) {
-		null_error();
-		return -1;
-	}
+    if (o == NULL) {
+        null_error();
+        return -1;
+    }
 
-	m = o->ob_type->tp_as_sequence;
-	if (m && m->sq_length)
-		return m->sq_length(o);
+    m = o->ob_type->tp_as_sequence;
+    if (m && m->sq_length)
+        return m->sq_length(o);
 
-	return PyMapping_Size(o);
+    return PyMapping_Size(o);
 }
 
 #undef PyObject_Length
 Py_ssize_t
 PyObject_Length(PyObject *o)
 {
-	return PyObject_Size(o);
+    return PyObject_Size(o);
 }
 #define PyObject_Length PyObject_Size
 
@@ -74,149 +74,149 @@ PyObject_Length(PyObject *o)
 Py_ssize_t
 _PyObject_LengthHint(PyObject *o, Py_ssize_t defaultvalue)
 {
-	static PyObject *hintstrobj = NULL;
-	PyObject *ro, *hintmeth;
-	Py_ssize_t rv;
-
-	/* try o.__len__() */
-	rv = PyObject_Size(o);
-	if (rv >= 0)
-		return rv;
-	if (PyErr_Occurred()) {
-		if (!PyErr_ExceptionMatches(PyExc_TypeError))
-			return -1;
-		PyErr_Clear();
-	}
-
-	/* try o.__length_hint__() */
-        hintmeth = _PyObject_LookupSpecial(o, "__length_hint__", &hintstrobj);
-	if (hintmeth == NULL) {
-		if (PyErr_Occurred())
-			return -1;
-		else
-			return defaultvalue;
-	}
-	ro = PyObject_CallFunctionObjArgs(hintmeth, NULL);
-	Py_DECREF(hintmeth);
-	if (ro == NULL) {
-		if (!PyErr_ExceptionMatches(PyExc_TypeError))
-			return -1;
-		PyErr_Clear();
-		return defaultvalue;
-	}
-	rv = PyLong_Check(ro) ? PyLong_AsSsize_t(ro) : defaultvalue;
-	Py_DECREF(ro);
-	return rv;
+    static PyObject *hintstrobj = NULL;
+    PyObject *ro, *hintmeth;
+    Py_ssize_t rv;
+
+    /* try o.__len__() */
+    rv = PyObject_Size(o);
+    if (rv >= 0)
+        return rv;
+    if (PyErr_Occurred()) {
+        if (!PyErr_ExceptionMatches(PyExc_TypeError))
+            return -1;
+        PyErr_Clear();
+    }
+
+    /* try o.__length_hint__() */
+    hintmeth = _PyObject_LookupSpecial(o, "__length_hint__", &hintstrobj);
+    if (hintmeth == NULL) {
+        if (PyErr_Occurred())
+            return -1;
+        else
+            return defaultvalue;
+    }
+    ro = PyObject_CallFunctionObjArgs(hintmeth, NULL);
+    Py_DECREF(hintmeth);
+    if (ro == NULL) {
+        if (!PyErr_ExceptionMatches(PyExc_TypeError))
+            return -1;
+        PyErr_Clear();
+        return defaultvalue;
+    }
+    rv = PyLong_Check(ro) ? PyLong_AsSsize_t(ro) : defaultvalue;
+    Py_DECREF(ro);
+    return rv;
 }
 
 PyObject *
 PyObject_GetItem(PyObject *o, PyObject *key)
 {
-	PyMappingMethods *m;
-
-	if (o == NULL || key == NULL)
-		return null_error();
-
-	m = o->ob_type->tp_as_mapping;
-	if (m && m->mp_subscript)
-		return m->mp_subscript(o, key);
-
-	if (o->ob_type->tp_as_sequence) {
-		if (PyIndex_Check(key)) {
-			Py_ssize_t key_value;
-			key_value = PyNumber_AsSsize_t(key, PyExc_IndexError);
-			if (key_value == -1 && PyErr_Occurred())
-				return NULL;
-			return PySequence_GetItem(o, key_value);
-		}
-		else if (o->ob_type->tp_as_sequence->sq_item)
-			return type_error("sequence index must "
-					  "be integer, not '%.200s'", key);
-	}
+    PyMappingMethods *m;
+
+    if (o == NULL || key == NULL)
+        return null_error();
+
+    m = o->ob_type->tp_as_mapping;
+    if (m && m->mp_subscript)
+        return m->mp_subscript(o, key);
+
+    if (o->ob_type->tp_as_sequence) {
+        if (PyIndex_Check(key)) {
+            Py_ssize_t key_value;
+            key_value = PyNumber_AsSsize_t(key, PyExc_IndexError);
+            if (key_value == -1 && PyErr_Occurred())
+                return NULL;
+            return PySequence_GetItem(o, key_value);
+        }
+        else if (o->ob_type->tp_as_sequence->sq_item)
+            return type_error("sequence index must "
+                              "be integer, not '%.200s'", key);
+    }
 
-	return type_error("'%.200s' object is not subscriptable", o);
+    return type_error("'%.200s' object is not subscriptable", o);
 }
 
 int
 PyObject_SetItem(PyObject *o, PyObject *key, PyObject *value)
 {
-	PyMappingMethods *m;
-
-	if (o == NULL || key == NULL || value == NULL) {
-		null_error();
-		return -1;
-	}
-	m = o->ob_type->tp_as_mapping;
-	if (m && m->mp_ass_subscript)
-		return m->mp_ass_subscript(o, key, value);
-
-	if (o->ob_type->tp_as_sequence) {
-		if (PyIndex_Check(key)) {
-			Py_ssize_t key_value;
-			key_value = PyNumber_AsSsize_t(key, PyExc_IndexError);
-			if (key_value == -1 && PyErr_Occurred())
-				return -1;
-			return PySequence_SetItem(o, key_value, value);
-		}
-		else if (o->ob_type->tp_as_sequence->sq_ass_item) {
-			type_error("sequence index must be "
-				   "integer, not '%.200s'", key);
-			return -1;
-		}
-	}
-
-	type_error("'%.200s' object does not support item assignment", o);
-	return -1;
+    PyMappingMethods *m;
+
+    if (o == NULL || key == NULL || value == NULL) {
+        null_error();
+        return -1;
+    }
+    m = o->ob_type->tp_as_mapping;
+    if (m && m->mp_ass_subscript)
+        return m->mp_ass_subscript(o, key, value);
+
+    if (o->ob_type->tp_as_sequence) {
+        if (PyIndex_Check(key)) {
+            Py_ssize_t key_value;
+            key_value = PyNumber_AsSsize_t(key, PyExc_IndexError);
+            if (key_value == -1 && PyErr_Occurred())
+                return -1;
+            return PySequence_SetItem(o, key_value, value);
+        }
+        else if (o->ob_type->tp_as_sequence->sq_ass_item) {
+            type_error("sequence index must be "
+                       "integer, not '%.200s'", key);
+            return -1;
+        }
+    }
+
+    type_error("'%.200s' object does not support item assignment", o);
+    return -1;
 }
 
 int
 PyObject_DelItem(PyObject *o, PyObject *key)
 {
-	PyMappingMethods *m;
-
-	if (o == NULL || key == NULL) {
-		null_error();
-		return -1;
-	}
-	m = o->ob_type->tp_as_mapping;
-	if (m && m->mp_ass_subscript)
-		return m->mp_ass_subscript(o, key, (PyObject*)NULL);
-
-	if (o->ob_type->tp_as_sequence) {
-		if (PyIndex_Check(key)) {
-			Py_ssize_t key_value;
-			key_value = PyNumber_AsSsize_t(key, PyExc_IndexError);
-			if (key_value == -1 && PyErr_Occurred())
-				return -1;
-			return PySequence_DelItem(o, key_value);
-		}
-		else if (o->ob_type->tp_as_sequence->sq_ass_item) {
-			type_error("sequence index must be "
-				   "integer, not '%.200s'", key);
-			return -1;
-		}
-	}
-
-	type_error("'%.200s' object does not support item deletion", o);
-	return -1;
+    PyMappingMethods *m;
+
+    if (o == NULL || key == NULL) {
+        null_error();
+        return -1;
+    }
+    m = o->ob_type->tp_as_mapping;
+    if (m && m->mp_ass_subscript)
+        return m->mp_ass_subscript(o, key, (PyObject*)NULL);
+
+    if (o->ob_type->tp_as_sequence) {
+        if (PyIndex_Check(key)) {
+            Py_ssize_t key_value;
+            key_value = PyNumber_AsSsize_t(key, PyExc_IndexError);
+            if (key_value == -1 && PyErr_Occurred())
+                return -1;
+            return PySequence_DelItem(o, key_value);
+        }
+        else if (o->ob_type->tp_as_sequence->sq_ass_item) {
+            type_error("sequence index must be "
+                       "integer, not '%.200s'", key);
+            return -1;
+        }
+    }
+
+    type_error("'%.200s' object does not support item deletion", o);
+    return -1;
 }
 
 int
 PyObject_DelItemString(PyObject *o, char *key)
 {
-	PyObject *okey;
-	int ret;
+    PyObject *okey;
+    int ret;
 
-	if (o == NULL || key == NULL) {
-		null_error();
-		return -1;
-	}
-	okey = PyUnicode_FromString(key);
-	if (okey == NULL)
-		return -1;
-	ret = PyObject_DelItem(o, okey);
-	Py_DECREF(okey);
-	return ret;
+    if (o == NULL || key == NULL) {
+        null_error();
+        return -1;
+    }
+    okey = PyUnicode_FromString(key);
+    if (okey == NULL)
+        return -1;
+    ret = PyObject_DelItem(o, okey);
+    Py_DECREF(okey);
+    return ret;
 }
 
 /* We release the buffer right after use of this function which could
@@ -224,104 +224,104 @@ PyObject_DelItemString(PyObject *o, char *key)
  */
 int
 PyObject_AsCharBuffer(PyObject *obj,
-		      const char **buffer,
-		      Py_ssize_t *buffer_len)
-{
-	PyBufferProcs *pb;
-	Py_buffer view;
-
-	if (obj == NULL || buffer == NULL || buffer_len == NULL) {
-		null_error();
-		return -1;
-	}
-	pb = obj->ob_type->tp_as_buffer;
-	if (pb == NULL || pb->bf_getbuffer == NULL) {
-		PyErr_SetString(PyExc_TypeError,
-				"expected an object with the buffer interface");
-		return -1;
-	}
-	if ((*pb->bf_getbuffer)(obj, &view, PyBUF_SIMPLE)) return -1;
-
-	*buffer = view.buf;
-	*buffer_len = view.len;
-	if (pb->bf_releasebuffer != NULL)
-		(*pb->bf_releasebuffer)(obj, &view);
-	Py_XDECREF(view.obj);
-	return 0;
+                      const char **buffer,
+                      Py_ssize_t *buffer_len)
+{
+    PyBufferProcs *pb;
+    Py_buffer view;
+
+    if (obj == NULL || buffer == NULL || buffer_len == NULL) {
+        null_error();
+        return -1;
+    }
+    pb = obj->ob_type->tp_as_buffer;
+    if (pb == NULL || pb->bf_getbuffer == NULL) {
+        PyErr_SetString(PyExc_TypeError,
+                        "expected an object with the buffer interface");
+        return -1;
+    }
+    if ((*pb->bf_getbuffer)(obj, &view, PyBUF_SIMPLE)) return -1;
+
+    *buffer = view.buf;
+    *buffer_len = view.len;
+    if (pb->bf_releasebuffer != NULL)
+        (*pb->bf_releasebuffer)(obj, &view);
+    Py_XDECREF(view.obj);
+    return 0;
 }
 
 int
 PyObject_CheckReadBuffer(PyObject *obj)
 {
-	PyBufferProcs *pb = obj->ob_type->tp_as_buffer;
-	Py_buffer view;
+    PyBufferProcs *pb = obj->ob_type->tp_as_buffer;
+    Py_buffer view;
 
-	if (pb == NULL ||
-	    pb->bf_getbuffer == NULL)
-		return 0;
-	if ((*pb->bf_getbuffer)(obj, &view, PyBUF_SIMPLE) == -1) {
-		PyErr_Clear();
-		return 0;
-	}
-	PyBuffer_Release(&view);
-	return 1;
+    if (pb == NULL ||
+        pb->bf_getbuffer == NULL)
+        return 0;
+    if ((*pb->bf_getbuffer)(obj, &view, PyBUF_SIMPLE) == -1) {
+        PyErr_Clear();
+        return 0;
+    }
+    PyBuffer_Release(&view);
+    return 1;
 }
 
 int PyObject_AsReadBuffer(PyObject *obj,
-			  const void **buffer,
-			  Py_ssize_t *buffer_len)
-{
-	PyBufferProcs *pb;
-	Py_buffer view;
-
-	if (obj == NULL || buffer == NULL || buffer_len == NULL) {
-		null_error();
-		return -1;
-	}
-	pb = obj->ob_type->tp_as_buffer;
-	if (pb == NULL ||
-	    pb->bf_getbuffer == NULL) {
-		PyErr_SetString(PyExc_TypeError,
-				"expected an object with a buffer interface");
-		return -1;
-	}
-
-	if ((*pb->bf_getbuffer)(obj, &view, PyBUF_SIMPLE)) return -1;
-
-	*buffer = view.buf;
-	*buffer_len = view.len;
-	if (pb->bf_releasebuffer != NULL)
-		(*pb->bf_releasebuffer)(obj, &view);
-	Py_XDECREF(view.obj);
-	return 0;
+                          const void **buffer,
+                          Py_ssize_t *buffer_len)
+{
+    PyBufferProcs *pb;
+    Py_buffer view;
+
+    if (obj == NULL || buffer == NULL || buffer_len == NULL) {
+        null_error();
+        return -1;
+    }
+    pb = obj->ob_type->tp_as_buffer;
+    if (pb == NULL ||
+        pb->bf_getbuffer == NULL) {
+        PyErr_SetString(PyExc_TypeError,
+                        "expected an object with a buffer interface");
+        return -1;
+    }
+
+    if ((*pb->bf_getbuffer)(obj, &view, PyBUF_SIMPLE)) return -1;
+
+    *buffer = view.buf;
+    *buffer_len = view.len;
+    if (pb->bf_releasebuffer != NULL)
+        (*pb->bf_releasebuffer)(obj, &view);
+    Py_XDECREF(view.obj);
+    return 0;
 }
 
 int PyObject_AsWriteBuffer(PyObject *obj,
-			   void **buffer,
-			   Py_ssize_t *buffer_len)
-{
-	PyBufferProcs *pb;
-	Py_buffer view;
-
-	if (obj == NULL || buffer == NULL || buffer_len == NULL) {
-		null_error();
-		return -1;
-	}
-	pb = obj->ob_type->tp_as_buffer;
-	if (pb == NULL ||
-	    pb->bf_getbuffer == NULL ||
-	    ((*pb->bf_getbuffer)(obj, &view, PyBUF_WRITABLE) != 0)) {
-		PyErr_SetString(PyExc_TypeError,
-				"expected an object with a writable buffer interface");
-		return -1;
-	}
-
-	*buffer = view.buf;
-	*buffer_len = view.len;
-	if (pb->bf_releasebuffer != NULL)
-		(*pb->bf_releasebuffer)(obj, &view);
-	Py_XDECREF(view.obj);
-	return 0;
+                           void **buffer,
+                           Py_ssize_t *buffer_len)
+{
+    PyBufferProcs *pb;
+    Py_buffer view;
+
+    if (obj == NULL || buffer == NULL || buffer_len == NULL) {
+        null_error();
+        return -1;
+    }
+    pb = obj->ob_type->tp_as_buffer;
+    if (pb == NULL ||
+        pb->bf_getbuffer == NULL ||
+        ((*pb->bf_getbuffer)(obj, &view, PyBUF_WRITABLE) != 0)) {
+        PyErr_SetString(PyExc_TypeError,
+                        "expected an object with a writable buffer interface");
+        return -1;
+    }
+
+    *buffer = view.buf;
+    *buffer_len = view.len;
+    if (pb->bf_releasebuffer != NULL)
+        (*pb->bf_releasebuffer)(obj, &view);
+    Py_XDECREF(view.obj);
+    return 0;
 }
 
 /* Buffer C-API for Python 3.0 */
@@ -329,119 +329,119 @@ int PyObject_AsWriteBuffer(PyObject *obj,
 int
 PyObject_GetBuffer(PyObject *obj, Py_buffer *view, int flags)
 {
-	if (!PyObject_CheckBuffer(obj)) {
-		PyErr_Format(PyExc_TypeError,
-                             "'%100s' does not support the buffer interface",
-                             Py_TYPE(obj)->tp_name);
-		return -1;
-	}
-	return (*(obj->ob_type->tp_as_buffer->bf_getbuffer))(obj, view, flags);
+    if (!PyObject_CheckBuffer(obj)) {
+        PyErr_Format(PyExc_TypeError,
+                     "'%100s' does not support the buffer interface",
+                     Py_TYPE(obj)->tp_name);
+        return -1;
+    }
+    return (*(obj->ob_type->tp_as_buffer->bf_getbuffer))(obj, view, flags);
 }
 
 static int
 _IsFortranContiguous(Py_buffer *view)
 {
-	Py_ssize_t sd, dim;
-	int i;
+    Py_ssize_t sd, dim;
+    int i;
 
-	if (view->ndim == 0) return 1;
-	if (view->strides == NULL) return (view->ndim == 1);
+    if (view->ndim == 0) return 1;
+    if (view->strides == NULL) return (view->ndim == 1);
 
-	sd = view->itemsize;
-	if (view->ndim == 1) return (view->shape[0] == 1 ||
-				   sd == view->strides[0]);
-	for (i=0; i<view->ndim; i++) {
-		dim = view->shape[i];
-		if (dim == 0) return 1;
-		if (view->strides[i] != sd) return 0;
-		sd *= dim;
-	}
-	return 1;
+    sd = view->itemsize;
+    if (view->ndim == 1) return (view->shape[0] == 1 ||
+                               sd == view->strides[0]);
+    for (i=0; i<view->ndim; i++) {
+        dim = view->shape[i];
+        if (dim == 0) return 1;
+        if (view->strides[i] != sd) return 0;
+        sd *= dim;
+    }
+    return 1;
 }
 
 static int
 _IsCContiguous(Py_buffer *view)
 {
-	Py_ssize_t sd, dim;
-	int i;
+    Py_ssize_t sd, dim;
+    int i;
 
-	if (view->ndim == 0) return 1;
-	if (view->strides == NULL) return 1;
+    if (view->ndim == 0) return 1;
+    if (view->strides == NULL) return 1;
 
-	sd = view->itemsize;
-	if (view->ndim == 1) return (view->shape[0] == 1 ||
-				   sd == view->strides[0]);
-	for (i=view->ndim-1; i>=0; i--) {
-		dim = view->shape[i];
-		if (dim == 0) return 1;
-		if (view->strides[i] != sd) return 0;
-		sd *= dim;
-	}
-	return 1;
+    sd = view->itemsize;
+    if (view->ndim == 1) return (view->shape[0] == 1 ||
+                               sd == view->strides[0]);
+    for (i=view->ndim-1; i>=0; i--) {
+        dim = view->shape[i];
+        if (dim == 0) return 1;
+        if (view->strides[i] != sd) return 0;
+        sd *= dim;
+    }
+    return 1;
 }
 
 int
 PyBuffer_IsContiguous(Py_buffer *view, char fort)
 {
 
-	if (view->suboffsets != NULL) return 0;
+    if (view->suboffsets != NULL) return 0;
 
-	if (fort == 'C')
-		return _IsCContiguous(view);
-	else if (fort == 'F')
-		return _IsFortranContiguous(view);
-	else if (fort == 'A')
-		return (_IsCContiguous(view) || _IsFortranContiguous(view));
-	return 0;
+    if (fort == 'C')
+        return _IsCContiguous(view);
+    else if (fort == 'F')
+        return _IsFortranContiguous(view);
+    else if (fort == 'A')
+        return (_IsCContiguous(view) || _IsFortranContiguous(view));
+    return 0;
 }
 
 
 void*
 PyBuffer_GetPointer(Py_buffer *view, Py_ssize_t *indices)
 {
-	char* pointer;
-	int i;
-	pointer = (char *)view->buf;
-	for (i = 0; i < view->ndim; i++) {
-		pointer += view->strides[i]*indices[i];
-		if ((view->suboffsets != NULL) && (view->suboffsets[i] >= 0)) {
-			pointer = *((char**)pointer) + view->suboffsets[i];
-		}
-	}
-	return (void*)pointer;
+    char* pointer;
+    int i;
+    pointer = (char *)view->buf;
+    for (i = 0; i < view->ndim; i++) {
+        pointer += view->strides[i]*indices[i];
+        if ((view->suboffsets != NULL) && (view->suboffsets[i] >= 0)) {
+            pointer = *((char**)pointer) + view->suboffsets[i];
+        }
+    }
+    return (void*)pointer;
 }
 
 
 void
 _add_one_to_index_F(int nd, Py_ssize_t *index, Py_ssize_t *shape)
 {
-	int k;
+    int k;
 
-	for (k=0; k<nd; k++) {
-		if (index[k] < shape[k]-1) {
-			index[k]++;
-			break;
-		}
-		else {
-			index[k] = 0;
-		}
-	}
+    for (k=0; k<nd; k++) {
+        if (index[k] < shape[k]-1) {
+            index[k]++;
+            break;
+        }
+        else {
+            index[k] = 0;
+        }
+    }
 }
 
 void
 _add_one_to_index_C(int nd, Py_ssize_t *index, Py_ssize_t *shape)
 {
-	int k;
+    int k;
 
-	for (k=nd-1; k>=0; k--) {
-		if (index[k] < shape[k]-1) {
-			index[k]++;
-			break;
-		}
-		else {
-			index[k] = 0;
-		}
-	}
+    for (k=nd-1; k>=0; k--) {
+        if (index[k] < shape[k]-1) {
+            index[k]++;
+            break;
+        }
+        else {
+            index[k] = 0;
+        }
+    }
 }
 
   /* view is not checked for consistency in either of these.  It is
@@ -452,242 +452,242 @@ _add_one_to_index_C(int nd, Py_ssize_t *index, Py_ssize_t *shape)
 int
 PyBuffer_ToContiguous(void *buf, Py_buffer *view, Py_ssize_t len, char fort)
 {
-	int k;
-	void (*addone)(int, Py_ssize_t *, Py_ssize_t *);
-	Py_ssize_t *indices, elements;
-	char *dest, *ptr;
-
-	if (len > view->len) {
-		len = view->len;
-	}
-
-	if (PyBuffer_IsContiguous(view, fort)) {
-		/* simplest copy is all that is needed */
-		memcpy(buf, view->buf, len);
-		return 0;
-	}
-
-	/* Otherwise a more elaborate scheme is needed */
-
-	/* XXX(nnorwitz): need to check for overflow! */
-	indices = (Py_ssize_t *)PyMem_Malloc(sizeof(Py_ssize_t)*(view->ndim));
-	if (indices == NULL) {
-		PyErr_NoMemory();
-		return -1;
-	}
-	for (k=0; k<view->ndim;k++) {
-		indices[k] = 0;
-	}
-
-	if (fort == 'F') {
-		addone = _add_one_to_index_F;
-	}
-	else {
-		addone = _add_one_to_index_C;
-	}
-	dest = buf;
-	/* XXX : This is not going to be the fastest code in the world
-		 several optimizations are possible.
-	 */
-	elements = len / view->itemsize;
-	while (elements--) {
-		addone(view->ndim, indices, view->shape);
-		ptr = PyBuffer_GetPointer(view, indices);
-		memcpy(dest, ptr, view->itemsize);
-		dest += view->itemsize;
-	}
-	PyMem_Free(indices);
-	return 0;
+    int k;
+    void (*addone)(int, Py_ssize_t *, Py_ssize_t *);
+    Py_ssize_t *indices, elements;
+    char *dest, *ptr;
+
+    if (len > view->len) {
+        len = view->len;
+    }
+
+    if (PyBuffer_IsContiguous(view, fort)) {
+        /* simplest copy is all that is needed */
+        memcpy(buf, view->buf, len);
+        return 0;
+    }
+
+    /* Otherwise a more elaborate scheme is needed */
+
+    /* XXX(nnorwitz): need to check for overflow! */
+    indices = (Py_ssize_t *)PyMem_Malloc(sizeof(Py_ssize_t)*(view->ndim));
+    if (indices == NULL) {
+        PyErr_NoMemory();
+        return -1;
+    }
+    for (k=0; k<view->ndim;k++) {
+        indices[k] = 0;
+    }
+
+    if (fort == 'F') {
+        addone = _add_one_to_index_F;
+    }
+    else {
+        addone = _add_one_to_index_C;
+    }
+    dest = buf;
+    /* XXX : This is not going to be the fastest code in the world
+             several optimizations are possible.
+     */
+    elements = len / view->itemsize;
+    while (elements--) {
+        addone(view->ndim, indices, view->shape);
+        ptr = PyBuffer_GetPointer(view, indices);
+        memcpy(dest, ptr, view->itemsize);
+        dest += view->itemsize;
+    }
+    PyMem_Free(indices);
+    return 0;
 }
 
 int
 PyBuffer_FromContiguous(Py_buffer *view, void *buf, Py_ssize_t len, char fort)
 {
-	int k;
-	void (*addone)(int, Py_ssize_t *, Py_ssize_t *);
-	Py_ssize_t *indices, elements;
-	char *src, *ptr;
-
-	if (len > view->len) {
-		len = view->len;
-	}
-
-	if (PyBuffer_IsContiguous(view, fort)) {
-		/* simplest copy is all that is needed */
-		memcpy(view->buf, buf, len);
-		return 0;
-	}
-
-	/* Otherwise a more elaborate scheme is needed */
-
-	/* XXX(nnorwitz): need to check for overflow! */
-	indices = (Py_ssize_t *)PyMem_Malloc(sizeof(Py_ssize_t)*(view->ndim));
-	if (indices == NULL) {
-		PyErr_NoMemory();
-		return -1;
-	}
-	for (k=0; k<view->ndim;k++) {
-		indices[k] = 0;
-	}
-
-	if (fort == 'F') {
-		addone = _add_one_to_index_F;
-	}
-	else {
-		addone = _add_one_to_index_C;
-	}
-	src = buf;
-	/* XXX : This is not going to be the fastest code in the world
-		 several optimizations are possible.
-	 */
-	elements = len / view->itemsize;
-	while (elements--) {
-		addone(view->ndim, indices, view->shape);
-		ptr = PyBuffer_GetPointer(view, indices);
-		memcpy(ptr, src, view->itemsize);
-		src += view->itemsize;
-	}
-
-	PyMem_Free(indices);
-	return 0;
+    int k;
+    void (*addone)(int, Py_ssize_t *, Py_ssize_t *);
+    Py_ssize_t *indices, elements;
+    char *src, *ptr;
+
+    if (len > view->len) {
+        len = view->len;
+    }
+
+    if (PyBuffer_IsContiguous(view, fort)) {
+        /* simplest copy is all that is needed */
+        memcpy(view->buf, buf, len);
+        return 0;
+    }
+
+    /* Otherwise a more elaborate scheme is needed */
+
+    /* XXX(nnorwitz): need to check for overflow! */
+    indices = (Py_ssize_t *)PyMem_Malloc(sizeof(Py_ssize_t)*(view->ndim));
+    if (indices == NULL) {
+        PyErr_NoMemory();
+        return -1;
+    }
+    for (k=0; k<view->ndim;k++) {
+        indices[k] = 0;
+    }
+
+    if (fort == 'F') {
+        addone = _add_one_to_index_F;
+    }
+    else {
+        addone = _add_one_to_index_C;
+    }
+    src = buf;
+    /* XXX : This is not going to be the fastest code in the world
+             several optimizations are possible.
+     */
+    elements = len / view->itemsize;
+    while (elements--) {
+        addone(view->ndim, indices, view->shape);
+        ptr = PyBuffer_GetPointer(view, indices);
+        memcpy(ptr, src, view->itemsize);
+        src += view->itemsize;
+    }
+
+    PyMem_Free(indices);
+    return 0;
 }
 
 int PyObject_CopyData(PyObject *dest, PyObject *src)
 {
-	Py_buffer view_dest, view_src;
-	int k;
-	Py_ssize_t *indices, elements;
-	char *dptr, *sptr;
-
-	if (!PyObject_CheckBuffer(dest) ||
-	    !PyObject_CheckBuffer(src)) {
-		PyErr_SetString(PyExc_TypeError,
-				"both destination and source must have the "\
-				"buffer interface");
-		return -1;
-	}
-
-	if (PyObject_GetBuffer(dest, &view_dest, PyBUF_FULL) != 0) return -1;
-	if (PyObject_GetBuffer(src, &view_src, PyBUF_FULL_RO) != 0) {
-		PyBuffer_Release(&view_dest);
-		return -1;
-	}
-
-	if (view_dest.len < view_src.len) {
-		PyErr_SetString(PyExc_BufferError,
-				"destination is too small to receive data from source");
-		PyBuffer_Release(&view_dest);
-		PyBuffer_Release(&view_src);
-		return -1;
-	}
-
-	if ((PyBuffer_IsContiguous(&view_dest, 'C') &&
-	     PyBuffer_IsContiguous(&view_src, 'C')) ||
-	    (PyBuffer_IsContiguous(&view_dest, 'F') &&
-	     PyBuffer_IsContiguous(&view_src, 'F'))) {
-		/* simplest copy is all that is needed */
-		memcpy(view_dest.buf, view_src.buf, view_src.len);
-		PyBuffer_Release(&view_dest);
-		PyBuffer_Release(&view_src);
-		return 0;
-	}
-
-	/* Otherwise a more elaborate copy scheme is needed */
-
-	/* XXX(nnorwitz): need to check for overflow! */
-	indices = (Py_ssize_t *)PyMem_Malloc(sizeof(Py_ssize_t)*view_src.ndim);
-	if (indices == NULL) {
-		PyErr_NoMemory();
-		PyBuffer_Release(&view_dest);
-		PyBuffer_Release(&view_src);
-		return -1;
-	}
-	for (k=0; k<view_src.ndim;k++) {
-		indices[k] = 0;
-	}
-	elements = 1;
-	for (k=0; k<view_src.ndim; k++) {
-		/* XXX(nnorwitz): can this overflow? */
-		elements *= view_src.shape[k];
-	}
-	while (elements--) {
-		_add_one_to_index_C(view_src.ndim, indices, view_src.shape);
-		dptr = PyBuffer_GetPointer(&view_dest, indices);
-		sptr = PyBuffer_GetPointer(&view_src, indices);
-		memcpy(dptr, sptr, view_src.itemsize);
-	}
-	PyMem_Free(indices);
-	PyBuffer_Release(&view_dest);
-	PyBuffer_Release(&view_src);
-	return 0;
+    Py_buffer view_dest, view_src;
+    int k;
+    Py_ssize_t *indices, elements;
+    char *dptr, *sptr;
+
+    if (!PyObject_CheckBuffer(dest) ||
+        !PyObject_CheckBuffer(src)) {
+        PyErr_SetString(PyExc_TypeError,
+                        "both destination and source must have the "\
+                        "buffer interface");
+        return -1;
+    }
+
+    if (PyObject_GetBuffer(dest, &view_dest, PyBUF_FULL) != 0) return -1;
+    if (PyObject_GetBuffer(src, &view_src, PyBUF_FULL_RO) != 0) {
+        PyBuffer_Release(&view_dest);
+        return -1;
+    }
+
+    if (view_dest.len < view_src.len) {
+        PyErr_SetString(PyExc_BufferError,
+                        "destination is too small to receive data from source");
+        PyBuffer_Release(&view_dest);
+        PyBuffer_Release(&view_src);
+        return -1;
+    }
+
+    if ((PyBuffer_IsContiguous(&view_dest, 'C') &&
+         PyBuffer_IsContiguous(&view_src, 'C')) ||
+        (PyBuffer_IsContiguous(&view_dest, 'F') &&
+         PyBuffer_IsContiguous(&view_src, 'F'))) {
+        /* simplest copy is all that is needed */
+        memcpy(view_dest.buf, view_src.buf, view_src.len);
+        PyBuffer_Release(&view_dest);
+        PyBuffer_Release(&view_src);
+        return 0;
+    }
+
+    /* Otherwise a more elaborate copy scheme is needed */
+
+    /* XXX(nnorwitz): need to check for overflow! */
+    indices = (Py_ssize_t *)PyMem_Malloc(sizeof(Py_ssize_t)*view_src.ndim);
+    if (indices == NULL) {
+        PyErr_NoMemory();
+        PyBuffer_Release(&view_dest);
+        PyBuffer_Release(&view_src);
+        return -1;
+    }
+    for (k=0; k<view_src.ndim;k++) {
+        indices[k] = 0;
+    }
+    elements = 1;
+    for (k=0; k<view_src.ndim; k++) {
+        /* XXX(nnorwitz): can this overflow? */
+        elements *= view_src.shape[k];
+    }
+    while (elements--) {
+        _add_one_to_index_C(view_src.ndim, indices, view_src.shape);
+        dptr = PyBuffer_GetPointer(&view_dest, indices);
+        sptr = PyBuffer_GetPointer(&view_src, indices);
+        memcpy(dptr, sptr, view_src.itemsize);
+    }
+    PyMem_Free(indices);
+    PyBuffer_Release(&view_dest);
+    PyBuffer_Release(&view_src);
+    return 0;
 }
 
 void
 PyBuffer_FillContiguousStrides(int nd, Py_ssize_t *shape,
-			       Py_ssize_t *strides, int itemsize,
-			       char fort)
-{
-	int k;
-	Py_ssize_t sd;
-
-	sd = itemsize;
-	if (fort == 'F') {
-		for (k=0; k<nd; k++) {
-			strides[k] = sd;
-			sd *= shape[k];
-		}
-	}
-	else {
-		for (k=nd-1; k>=0; k--) {
-			strides[k] = sd;
-			sd *= shape[k];
-		}
-	}
-	return;
+                               Py_ssize_t *strides, int itemsize,
+                               char fort)
+{
+    int k;
+    Py_ssize_t sd;
+
+    sd = itemsize;
+    if (fort == 'F') {
+        for (k=0; k<nd; k++) {
+            strides[k] = sd;
+            sd *= shape[k];
+        }
+    }
+    else {
+        for (k=nd-1; k>=0; k--) {
+            strides[k] = sd;
+            sd *= shape[k];
+        }
+    }
+    return;
 }
 
 int
 PyBuffer_FillInfo(Py_buffer *view, PyObject *obj, void *buf, Py_ssize_t len,
-	      int readonly, int flags)
-{
-	if (view == NULL) return 0;
-	if (((flags & PyBUF_WRITABLE) == PyBUF_WRITABLE) &&
-	    (readonly == 1)) {
-		PyErr_SetString(PyExc_BufferError,
-				"Object is not writable.");
-		return -1;
-	}
-
-	view->obj = obj;
-	if (obj)
-		Py_INCREF(obj);
-	view->buf = buf;
-	view->len = len;
-	view->readonly = readonly;
-	view->itemsize = 1;
-	view->format = NULL;
-	if ((flags & PyBUF_FORMAT) == PyBUF_FORMAT)
-		view->format = "B";
-	view->ndim = 1;
-	view->shape = NULL;
-	if ((flags & PyBUF_ND) == PyBUF_ND)
-		view->shape = &(view->len);
-	view->strides = NULL;
-	if ((flags & PyBUF_STRIDES) == PyBUF_STRIDES)
-		view->strides = &(view->itemsize);
-	view->suboffsets = NULL;
-	view->internal = NULL;
-	return 0;
+              int readonly, int flags)
+{
+    if (view == NULL) return 0;
+    if (((flags & PyBUF_WRITABLE) == PyBUF_WRITABLE) &&
+        (readonly == 1)) {
+        PyErr_SetString(PyExc_BufferError,
+                        "Object is not writable.");
+        return -1;
+    }
+
+    view->obj = obj;
+    if (obj)
+        Py_INCREF(obj);
+    view->buf = buf;
+    view->len = len;
+    view->readonly = readonly;
+    view->itemsize = 1;
+    view->format = NULL;
+    if ((flags & PyBUF_FORMAT) == PyBUF_FORMAT)
+        view->format = "B";
+    view->ndim = 1;
+    view->shape = NULL;
+    if ((flags & PyBUF_ND) == PyBUF_ND)
+        view->shape = &(view->len);
+    view->strides = NULL;
+    if ((flags & PyBUF_STRIDES) == PyBUF_STRIDES)
+        view->strides = &(view->itemsize);
+    view->suboffsets = NULL;
+    view->internal = NULL;
+    return 0;
 }
 
 void
 PyBuffer_Release(Py_buffer *view)
 {
-	PyObject *obj = view->obj;
-	if (obj && Py_TYPE(obj)->tp_as_buffer && Py_TYPE(obj)->tp_as_buffer->bf_releasebuffer)
-		Py_TYPE(obj)->tp_as_buffer->bf_releasebuffer(obj, view);
-	Py_XDECREF(obj);
-	view->obj = NULL;
+    PyObject *obj = view->obj;
+    if (obj && Py_TYPE(obj)->tp_as_buffer && Py_TYPE(obj)->tp_as_buffer->bf_releasebuffer)
+        Py_TYPE(obj)->tp_as_buffer->bf_releasebuffer(obj, view);
+    Py_XDECREF(obj);
+    view->obj = NULL;
 }
 
 PyObject *
@@ -700,41 +700,41 @@ PyObject_Format(PyObject *obj, PyObject *format_spec)
 
     /* Initialize cached value */
     if (str__format__ == NULL) {
-        /* Initialize static variable needed by _PyType_Lookup */
-        str__format__ = PyUnicode_FromString("__format__");
-        if (str__format__ == NULL)
-            goto done;
+    /* Initialize static variable needed by _PyType_Lookup */
+    str__format__ = PyUnicode_FromString("__format__");
+    if (str__format__ == NULL)
+        goto done;
     }
 
     /* If no format_spec is provided, use an empty string */
     if (format_spec == NULL) {
-        empty = PyUnicode_FromUnicode(NULL, 0);
-        format_spec = empty;
+    empty = PyUnicode_FromUnicode(NULL, 0);
+    format_spec = empty;
     }
 
     /* Make sure the type is initialized.  float gets initialized late */
     if (Py_TYPE(obj)->tp_dict == NULL)
-        if (PyType_Ready(Py_TYPE(obj)) < 0)
-            goto done;
+    if (PyType_Ready(Py_TYPE(obj)) < 0)
+        goto done;
 
     /* Find the (unbound!) __format__ method (a borrowed reference) */
     meth = _PyType_Lookup(Py_TYPE(obj), str__format__);
     if (meth == NULL) {
-        PyErr_Format(PyExc_TypeError,
-                "Type %.100s doesn't define __format__",
-                Py_TYPE(obj)->tp_name);
-            goto done;
+    PyErr_Format(PyExc_TypeError,
+        "Type %.100s doesn't define __format__",
+        Py_TYPE(obj)->tp_name);
+        goto done;
     }
 
     /* And call it, binding it to the value */
     result = PyObject_CallFunctionObjArgs(meth, obj, format_spec, NULL);
 
     if (result && !PyUnicode_Check(result)) {
-        PyErr_SetString(PyExc_TypeError,
-            "__format__ method did not return string");
-        Py_DECREF(result);
-        result = NULL;
-        goto done;
+    PyErr_SetString(PyExc_TypeError,
+        "__format__ method did not return string");
+    Py_DECREF(result);
+    result = NULL;
+    goto done;
     }
 
 done:
@@ -746,24 +746,24 @@ done:
 int
 PyNumber_Check(PyObject *o)
 {
-	return o && o->ob_type->tp_as_number &&
-	       (o->ob_type->tp_as_number->nb_int ||
-		o->ob_type->tp_as_number->nb_float);
+    return o && o->ob_type->tp_as_number &&
+           (o->ob_type->tp_as_number->nb_int ||
+        o->ob_type->tp_as_number->nb_float);
 }
 
 /* Binary operators */
 
 #define NB_SLOT(x) offsetof(PyNumberMethods, x)
 #define NB_BINOP(nb_methods, slot) \
-		(*(binaryfunc*)(& ((char*)nb_methods)[slot]))
+        (*(binaryfunc*)(& ((char*)nb_methods)[slot]))
 #define NB_TERNOP(nb_methods, slot) \
-		(*(ternaryfunc*)(& ((char*)nb_methods)[slot]))
+        (*(ternaryfunc*)(& ((char*)nb_methods)[slot]))
 
 /*
   Calling scheme used for binary operations:
 
   Order operations are tried until either a valid result or error:
-	w.op(v,w)[*], v.op(v,w), w.op(v,w)
+    w.op(v,w)[*], v.op(v,w), w.op(v,w)
 
   [*] only when v->ob_type != w->ob_type && w->ob_type is a subclass of
       v->ob_type
@@ -772,62 +772,62 @@ PyNumber_Check(PyObject *o)
 static PyObject *
 binary_op1(PyObject *v, PyObject *w, const int op_slot)
 {
-	PyObject *x;
-	binaryfunc slotv = NULL;
-	binaryfunc slotw = NULL;
-
-	if (v->ob_type->tp_as_number != NULL)
-		slotv = NB_BINOP(v->ob_type->tp_as_number, op_slot);
-	if (w->ob_type != v->ob_type &&
-	    w->ob_type->tp_as_number != NULL) {
-		slotw = NB_BINOP(w->ob_type->tp_as_number, op_slot);
-		if (slotw == slotv)
-			slotw = NULL;
-	}
-	if (slotv) {
-		if (slotw && PyType_IsSubtype(w->ob_type, v->ob_type)) {
-			x = slotw(v, w);
-			if (x != Py_NotImplemented)
-				return x;
-			Py_DECREF(x); /* can't do it */
-			slotw = NULL;
-		}
-		x = slotv(v, w);
-		if (x != Py_NotImplemented)
-			return x;
-		Py_DECREF(x); /* can't do it */
-	}
-	if (slotw) {
-		x = slotw(v, w);
-		if (x != Py_NotImplemented)
-			return x;
-		Py_DECREF(x); /* can't do it */
-	}
-	Py_INCREF(Py_NotImplemented);
-	return Py_NotImplemented;
+    PyObject *x;
+    binaryfunc slotv = NULL;
+    binaryfunc slotw = NULL;
+
+    if (v->ob_type->tp_as_number != NULL)
+        slotv = NB_BINOP(v->ob_type->tp_as_number, op_slot);
+    if (w->ob_type != v->ob_type &&
+        w->ob_type->tp_as_number != NULL) {
+        slotw = NB_BINOP(w->ob_type->tp_as_number, op_slot);
+        if (slotw == slotv)
+            slotw = NULL;
+    }
+    if (slotv) {
+        if (slotw && PyType_IsSubtype(w->ob_type, v->ob_type)) {
+            x = slotw(v, w);
+            if (x != Py_NotImplemented)
+                return x;
+            Py_DECREF(x); /* can't do it */
+            slotw = NULL;
+        }
+        x = slotv(v, w);
+        if (x != Py_NotImplemented)
+            return x;
+        Py_DECREF(x); /* can't do it */
+    }
+    if (slotw) {
+        x = slotw(v, w);
+        if (x != Py_NotImplemented)
+            return x;
+        Py_DECREF(x); /* can't do it */
+    }
+    Py_INCREF(Py_NotImplemented);
+    return Py_NotImplemented;
 }
 
 static PyObject *
 binop_type_error(PyObject *v, PyObject *w, const char *op_name)
 {
-	PyErr_Format(PyExc_TypeError,
-		     "unsupported operand type(s) for %.100s: "
-		     "'%.100s' and '%.100s'",
-		     op_name,
-		     v->ob_type->tp_name,
-		     w->ob_type->tp_name);
-	return NULL;
+    PyErr_Format(PyExc_TypeError,
+                 "unsupported operand type(s) for %.100s: "
+                 "'%.100s' and '%.100s'",
+                 op_name,
+                 v->ob_type->tp_name,
+                 w->ob_type->tp_name);
+    return NULL;
 }
 
 static PyObject *
 binary_op(PyObject *v, PyObject *w, const int op_slot, const char *op_name)
 {
-	PyObject *result = binary_op1(v, w, op_slot);
-	if (result == Py_NotImplemented) {
-		Py_DECREF(result);
-		return binop_type_error(v, w, op_name);
-	}
-	return result;
+    PyObject *result = binary_op1(v, w, op_slot);
+    if (result == Py_NotImplemented) {
+        Py_DECREF(result);
+        return binop_type_error(v, w, op_name);
+    }
+    return result;
 }
 
 
@@ -835,86 +835,86 @@ binary_op(PyObject *v, PyObject *w, const int op_slot, const char *op_name)
   Calling scheme used for ternary operations:
 
   Order operations are tried until either a valid result or error:
-	v.op(v,w,z), w.op(v,w,z), z.op(v,w,z)
+    v.op(v,w,z), w.op(v,w,z), z.op(v,w,z)
  */
 
 static PyObject *
 ternary_op(PyObject *v,
-	   PyObject *w,
-	   PyObject *z,
-	   const int op_slot,
-	   const char *op_name)
-{
-	PyNumberMethods *mv, *mw, *mz;
-	PyObject *x = NULL;
-	ternaryfunc slotv = NULL;
-	ternaryfunc slotw = NULL;
-	ternaryfunc slotz = NULL;
-
-	mv = v->ob_type->tp_as_number;
-	mw = w->ob_type->tp_as_number;
-	if (mv != NULL)
-		slotv = NB_TERNOP(mv, op_slot);
-	if (w->ob_type != v->ob_type &&
-	    mw != NULL) {
-		slotw = NB_TERNOP(mw, op_slot);
-		if (slotw == slotv)
-			slotw = NULL;
-	}
-	if (slotv) {
-		if (slotw && PyType_IsSubtype(w->ob_type, v->ob_type)) {
-			x = slotw(v, w, z);
-			if (x != Py_NotImplemented)
-				return x;
-			Py_DECREF(x); /* can't do it */
-			slotw = NULL;
-		}
-		x = slotv(v, w, z);
-		if (x != Py_NotImplemented)
-			return x;
-		Py_DECREF(x); /* can't do it */
-	}
-	if (slotw) {
-		x = slotw(v, w, z);
-		if (x != Py_NotImplemented)
-			return x;
-		Py_DECREF(x); /* can't do it */
-	}
-	mz = z->ob_type->tp_as_number;
-	if (mz != NULL) {
-		slotz = NB_TERNOP(mz, op_slot);
-		if (slotz == slotv || slotz == slotw)
-			slotz = NULL;
-		if (slotz) {
-			x = slotz(v, w, z);
-			if (x != Py_NotImplemented)
-				return x;
-			Py_DECREF(x); /* can't do it */
-		}
-	}
-
-	if (z == Py_None)
-		PyErr_Format(
-			PyExc_TypeError,
-			"unsupported operand type(s) for ** or pow(): "
-			"'%.100s' and '%.100s'",
-			v->ob_type->tp_name,
-			w->ob_type->tp_name);
-	else
-		PyErr_Format(
-			PyExc_TypeError,
-			"unsupported operand type(s) for pow(): "
-			"'%.100s', '%.100s', '%.100s'",
-			v->ob_type->tp_name,
-			w->ob_type->tp_name,
-			z->ob_type->tp_name);
-	return NULL;
+           PyObject *w,
+           PyObject *z,
+           const int op_slot,
+           const char *op_name)
+{
+    PyNumberMethods *mv, *mw, *mz;
+    PyObject *x = NULL;
+    ternaryfunc slotv = NULL;
+    ternaryfunc slotw = NULL;
+    ternaryfunc slotz = NULL;
+
+    mv = v->ob_type->tp_as_number;
+    mw = w->ob_type->tp_as_number;
+    if (mv != NULL)
+        slotv = NB_TERNOP(mv, op_slot);
+    if (w->ob_type != v->ob_type &&
+        mw != NULL) {
+        slotw = NB_TERNOP(mw, op_slot);
+        if (slotw == slotv)
+            slotw = NULL;
+    }
+    if (slotv) {
+        if (slotw && PyType_IsSubtype(w->ob_type, v->ob_type)) {
+            x = slotw(v, w, z);
+            if (x != Py_NotImplemented)
+                return x;
+            Py_DECREF(x); /* can't do it */
+            slotw = NULL;
+        }
+        x = slotv(v, w, z);
+        if (x != Py_NotImplemented)
+            return x;
+        Py_DECREF(x); /* can't do it */
+    }
+    if (slotw) {
+        x = slotw(v, w, z);
+        if (x != Py_NotImplemented)
+            return x;
+        Py_DECREF(x); /* can't do it */
+    }
+    mz = z->ob_type->tp_as_number;
+    if (mz != NULL) {
+        slotz = NB_TERNOP(mz, op_slot);
+        if (slotz == slotv || slotz == slotw)
+            slotz = NULL;
+        if (slotz) {
+            x = slotz(v, w, z);
+            if (x != Py_NotImplemented)
+                return x;
+            Py_DECREF(x); /* can't do it */
+        }
+    }
+
+    if (z == Py_None)
+        PyErr_Format(
+            PyExc_TypeError,
+            "unsupported operand type(s) for ** or pow(): "
+            "'%.100s' and '%.100s'",
+            v->ob_type->tp_name,
+            w->ob_type->tp_name);
+    else
+        PyErr_Format(
+            PyExc_TypeError,
+            "unsupported operand type(s) for pow(): "
+            "'%.100s', '%.100s', '%.100s'",
+            v->ob_type->tp_name,
+            w->ob_type->tp_name,
+            z->ob_type->tp_name);
+    return NULL;
 }
 
 #define BINARY_FUNC(func, op, op_name) \
     PyObject * \
     func(PyObject *v, PyObject *w) { \
-	    return binary_op(v, w, NB_SLOT(op), op_name); \
+        return binary_op(v, w, NB_SLOT(op), op_name); \
     }
 
 BINARY_FUNC(PyNumber_Or, nb_or, "|")
@@ -928,75 +928,75 @@ BINARY_FUNC(PyNumber_Divmod, nb_divmod, "divmod()")
 PyObject *
 PyNumber_Add(PyObject *v, PyObject *w)
 {
-	PyObject *result = binary_op1(v, w, NB_SLOT(nb_add));
-	if (result == Py_NotImplemented) {
-		PySequenceMethods *m = v->ob_type->tp_as_sequence;
-		Py_DECREF(result);
-		if (m && m->sq_concat) {
-			return (*m->sq_concat)(v, w);
-		}
-		result = binop_type_error(v, w, "+");
-	}
-	return result;
+    PyObject *result = binary_op1(v, w, NB_SLOT(nb_add));
+    if (result == Py_NotImplemented) {
+        PySequenceMethods *m = v->ob_type->tp_as_sequence;
+        Py_DECREF(result);
+        if (m && m->sq_concat) {
+            return (*m->sq_concat)(v, w);
+        }
+        result = binop_type_error(v, w, "+");
+    }
+    return result;
 }
 
 static PyObject *
 sequence_repeat(ssizeargfunc repeatfunc, PyObject *seq, PyObject *n)
 {
-	Py_ssize_t count;
-	if (PyIndex_Check(n)) {
-		count = PyNumber_AsSsize_t(n, PyExc_OverflowError);
-		if (count == -1 && PyErr_Occurred())
-			return NULL;
-	}
-	else {
-		return type_error("can't multiply sequence by "
-				  "non-int of type '%.200s'", n);
-	}
-	return (*repeatfunc)(seq, count);
+    Py_ssize_t count;
+    if (PyIndex_Check(n)) {
+        count = PyNumber_AsSsize_t(n, PyExc_OverflowError);
+        if (count == -1 && PyErr_Occurred())
+            return NULL;
+    }
+    else {
+        return type_error("can't multiply sequence by "
+                          "non-int of type '%.200s'", n);
+    }
+    return (*repeatfunc)(seq, count);
 }
 
 PyObject *
 PyNumber_Multiply(PyObject *v, PyObject *w)
 {
-	PyObject *result = binary_op1(v, w, NB_SLOT(nb_multiply));
-	if (result == Py_NotImplemented) {
-		PySequenceMethods *mv = v->ob_type->tp_as_sequence;
-		PySequenceMethods *mw = w->ob_type->tp_as_sequence;
-		Py_DECREF(result);
-		if  (mv && mv->sq_repeat) {
-			return sequence_repeat(mv->sq_repeat, v, w);
-		}
-		else if (mw && mw->sq_repeat) {
-			return sequence_repeat(mw->sq_repeat, w, v);
-		}
-		result = binop_type_error(v, w, "*");
-	}
-	return result;
+    PyObject *result = binary_op1(v, w, NB_SLOT(nb_multiply));
+    if (result == Py_NotImplemented) {
+        PySequenceMethods *mv = v->ob_type->tp_as_sequence;
+        PySequenceMethods *mw = w->ob_type->tp_as_sequence;
+        Py_DECREF(result);
+        if  (mv && mv->sq_repeat) {
+            return sequence_repeat(mv->sq_repeat, v, w);
+        }
+        else if (mw && mw->sq_repeat) {
+            return sequence_repeat(mw->sq_repeat, w, v);
+        }
+        result = binop_type_error(v, w, "*");
+    }
+    return result;
 }
 
 PyObject *
 PyNumber_FloorDivide(PyObject *v, PyObject *w)
 {
-	return binary_op(v, w, NB_SLOT(nb_floor_divide), "//");
+    return binary_op(v, w, NB_SLOT(nb_floor_divide), "//");
 }
 
 PyObject *
 PyNumber_TrueDivide(PyObject *v, PyObject *w)
 {
-	return binary_op(v, w, NB_SLOT(nb_true_divide), "/");
+    return binary_op(v, w, NB_SLOT(nb_true_divide), "/");
 }
 
 PyObject *
 PyNumber_Remainder(PyObject *v, PyObject *w)
 {
-	return binary_op(v, w, NB_SLOT(nb_remainder), "%");
+    return binary_op(v, w, NB_SLOT(nb_remainder), "%");
 }
 
 PyObject *
 PyNumber_Power(PyObject *v, PyObject *w, PyObject *z)
 {
-	return ternary_op(v, w, z, NB_SLOT(nb_power), "** or pow()");
+    return ternary_op(v, w, z, NB_SLOT(nb_power), "** or pow()");
 }
 
 /* Binary in-place operators */
@@ -1018,37 +1018,37 @@ PyNumber_Power(PyObject *v, PyObject *w, PyObject *z)
 static PyObject *
 binary_iop1(PyObject *v, PyObject *w, const int iop_slot, const int op_slot)
 {
-	PyNumberMethods *mv = v->ob_type->tp_as_number;
-	if (mv != NULL) {
-		binaryfunc slot = NB_BINOP(mv, iop_slot);
-		if (slot) {
-			PyObject *x = (slot)(v, w);
-			if (x != Py_NotImplemented) {
-				return x;
-			}
-			Py_DECREF(x);
-		}
-	}
-	return binary_op1(v, w, op_slot);
+    PyNumberMethods *mv = v->ob_type->tp_as_number;
+    if (mv != NULL) {
+        binaryfunc slot = NB_BINOP(mv, iop_slot);
+        if (slot) {
+            PyObject *x = (slot)(v, w);
+            if (x != Py_NotImplemented) {
+                return x;
+            }
+            Py_DECREF(x);
+        }
+    }
+    return binary_op1(v, w, op_slot);
 }
 
 static PyObject *
 binary_iop(PyObject *v, PyObject *w, const int iop_slot, const int op_slot,
-		const char *op_name)
+                const char *op_name)
 {
-	PyObject *result = binary_iop1(v, w, iop_slot, op_slot);
-	if (result == Py_NotImplemented) {
-		Py_DECREF(result);
-		return binop_type_error(v, w, op_name);
-	}
-	return result;
+    PyObject *result = binary_iop1(v, w, iop_slot, op_slot);
+    if (result == Py_NotImplemented) {
+        Py_DECREF(result);
+        return binop_type_error(v, w, op_name);
+    }
+    return result;
 }
 
 #define INPLACE_BINOP(func, iop, op, op_name) \
-	PyObject * \
-	func(PyObject *v, PyObject *w) { \
-		return binary_iop(v, w, NB_SLOT(iop), NB_SLOT(op), op_name); \
-	}
+    PyObject * \
+    func(PyObject *v, PyObject *w) { \
+        return binary_iop(v, w, NB_SLOT(iop), NB_SLOT(op), op_name); \
+    }
 
 INPLACE_BINOP(PyNumber_InPlaceOr, nb_inplace_or, nb_or, "|=")
 INPLACE_BINOP(PyNumber_InPlaceXor, nb_inplace_xor, nb_xor, "^=")
@@ -1060,84 +1060,84 @@ INPLACE_BINOP(PyNumber_InPlaceSubtract, nb_inplace_subtract, nb_subtract, "-=")
 PyObject *
 PyNumber_InPlaceFloorDivide(PyObject *v, PyObject *w)
 {
-	return binary_iop(v, w, NB_SLOT(nb_inplace_floor_divide),
-			  NB_SLOT(nb_floor_divide), "//=");
+    return binary_iop(v, w, NB_SLOT(nb_inplace_floor_divide),
+                      NB_SLOT(nb_floor_divide), "//=");
 }
 
 PyObject *
 PyNumber_InPlaceTrueDivide(PyObject *v, PyObject *w)
 {
-	return binary_iop(v, w, NB_SLOT(nb_inplace_true_divide),
-			  NB_SLOT(nb_true_divide), "/=");
+    return binary_iop(v, w, NB_SLOT(nb_inplace_true_divide),
+                      NB_SLOT(nb_true_divide), "/=");
 }
 
 PyObject *
 PyNumber_InPlaceAdd(PyObject *v, PyObject *w)
 {
-	PyObject *result = binary_iop1(v, w, NB_SLOT(nb_inplace_add),
-				       NB_SLOT(nb_add));
-	if (result == Py_NotImplemented) {
-		PySequenceMethods *m = v->ob_type->tp_as_sequence;
-		Py_DECREF(result);
-		if (m != NULL) {
-			binaryfunc f = NULL;
-			f = m->sq_inplace_concat;
-			if (f == NULL)
-				f = m->sq_concat;
-			if (f != NULL)
-				return (*f)(v, w);
-		}
-		result = binop_type_error(v, w, "+=");
-	}
-	return result;
+    PyObject *result = binary_iop1(v, w, NB_SLOT(nb_inplace_add),
+                                   NB_SLOT(nb_add));
+    if (result == Py_NotImplemented) {
+        PySequenceMethods *m = v->ob_type->tp_as_sequence;
+        Py_DECREF(result);
+        if (m != NULL) {
+            binaryfunc f = NULL;
+            f = m->sq_inplace_concat;
+            if (f == NULL)
+                f = m->sq_concat;
+            if (f != NULL)
+                return (*f)(v, w);
+        }
+        result = binop_type_error(v, w, "+=");
+    }
+    return result;
 }
 
 PyObject *
 PyNumber_InPlaceMultiply(PyObject *v, PyObject *w)
 {
-	PyObject *result = binary_iop1(v, w, NB_SLOT(nb_inplace_multiply),
-				       NB_SLOT(nb_multiply));
-	if (result == Py_NotImplemented) {
-		ssizeargfunc f = NULL;
-		PySequenceMethods *mv = v->ob_type->tp_as_sequence;
-		PySequenceMethods *mw = w->ob_type->tp_as_sequence;
-		Py_DECREF(result);
-		if (mv != NULL) {
-			f = mv->sq_inplace_repeat;
-			if (f == NULL)
-				f = mv->sq_repeat;
-			if (f != NULL)
-				return sequence_repeat(f, v, w);
-		}
-		else if (mw != NULL) {
-			/* Note that the right hand operand should not be
-			 * mutated in this case so sq_inplace_repeat is not
-			 * used. */
-			if (mw->sq_repeat)
-				return sequence_repeat(mw->sq_repeat, w, v);
-		}
-		result = binop_type_error(v, w, "*=");
-	}
-	return result;
+    PyObject *result = binary_iop1(v, w, NB_SLOT(nb_inplace_multiply),
+                                   NB_SLOT(nb_multiply));
+    if (result == Py_NotImplemented) {
+        ssizeargfunc f = NULL;
+        PySequenceMethods *mv = v->ob_type->tp_as_sequence;
+        PySequenceMethods *mw = w->ob_type->tp_as_sequence;
+        Py_DECREF(result);
+        if (mv != NULL) {
+            f = mv->sq_inplace_repeat;
+            if (f == NULL)
+                f = mv->sq_repeat;
+            if (f != NULL)
+                return sequence_repeat(f, v, w);
+        }
+        else if (mw != NULL) {
+            /* Note that the right hand operand should not be
+             * mutated in this case so sq_inplace_repeat is not
+             * used. */
+            if (mw->sq_repeat)
+                return sequence_repeat(mw->sq_repeat, w, v);
+        }
+        result = binop_type_error(v, w, "*=");
+    }
+    return result;
 }
 
 PyObject *
 PyNumber_InPlaceRemainder(PyObject *v, PyObject *w)
 {
-	return binary_iop(v, w, NB_SLOT(nb_inplace_remainder),
-				NB_SLOT(nb_remainder), "%=");
+    return binary_iop(v, w, NB_SLOT(nb_inplace_remainder),
+                            NB_SLOT(nb_remainder), "%=");
 }
 
 PyObject *
 PyNumber_InPlacePower(PyObject *v, PyObject *w, PyObject *z)
 {
-	if (v->ob_type->tp_as_number &&
-	    v->ob_type->tp_as_number->nb_inplace_power != NULL) {
-		return ternary_op(v, w, z, NB_SLOT(nb_inplace_power), "**=");
-	}
-	else {
-		return ternary_op(v, w, z, NB_SLOT(nb_power), "**=");
-	}
+    if (v->ob_type->tp_as_number &&
+        v->ob_type->tp_as_number->nb_inplace_power != NULL) {
+        return ternary_op(v, w, z, NB_SLOT(nb_inplace_power), "**=");
+    }
+    else {
+        return ternary_op(v, w, z, NB_SLOT(nb_power), "**=");
+    }
 }
 
 
@@ -1146,57 +1146,57 @@ PyNumber_InPlacePower(PyObject *v, PyObject *w, PyObject *z)
 PyObject *
 PyNumber_Negative(PyObject *o)
 {
-	PyNumberMethods *m;
+    PyNumberMethods *m;
 
-	if (o == NULL)
-		return null_error();
-	m = o->ob_type->tp_as_number;
-	if (m && m->nb_negative)
-		return (*m->nb_negative)(o);
+    if (o == NULL)
+        return null_error();
+    m = o->ob_type->tp_as_number;
+    if (m && m->nb_negative)
+        return (*m->nb_negative)(o);
 
-	return type_error("bad operand type for unary -: '%.200s'", o);
+    return type_error("bad operand type for unary -: '%.200s'", o);
 }
 
 PyObject *
 PyNumber_Positive(PyObject *o)
 {
-	PyNumberMethods *m;
+    PyNumberMethods *m;
 
-	if (o == NULL)
-		return null_error();
-	m = o->ob_type->tp_as_number;
-	if (m && m->nb_positive)
-		return (*m->nb_positive)(o);
+    if (o == NULL)
+        return null_error();
+    m = o->ob_type->tp_as_number;
+    if (m && m->nb_positive)
+        return (*m->nb_positive)(o);
 
-	return type_error("bad operand type for unary +: '%.200s'", o);
+    return type_error("bad operand type for unary +: '%.200s'", o);
 }
 
 PyObject *
 PyNumber_Invert(PyObject *o)
 {
-	PyNumberMethods *m;
+    PyNumberMethods *m;
 
-	if (o == NULL)
-		return null_error();
-	m = o->ob_type->tp_as_number;
-	if (m && m->nb_invert)
-		return (*m->nb_invert)(o);
+    if (o == NULL)
+        return null_error();
+    m = o->ob_type->tp_as_number;
+    if (m && m->nb_invert)
+        return (*m->nb_invert)(o);
 
-	return type_error("bad operand type for unary ~: '%.200s'", o);
+    return type_error("bad operand type for unary ~: '%.200s'", o);
 }
 
 PyObject *
 PyNumber_Absolute(PyObject *o)
 {
-	PyNumberMethods *m;
+    PyNumberMethods *m;
 
-	if (o == NULL)
-		return null_error();
-	m = o->ob_type->tp_as_number;
-	if (m && m->nb_absolute)
-		return m->nb_absolute(o);
+    if (o == NULL)
+        return null_error();
+    m = o->ob_type->tp_as_number;
+    if (m && m->nb_absolute)
+        return m->nb_absolute(o);
 
-	return type_error("bad operand type for abs(): '%.200s'", o);
+    return type_error("bad operand type for abs(): '%.200s'", o);
 }
 
 /* Return a Python Int or Long from the object item
@@ -1206,30 +1206,30 @@ PyNumber_Absolute(PyObject *o)
 PyObject *
 PyNumber_Index(PyObject *item)
 {
-	PyObject *result = NULL;
-	if (item == NULL)
-		return null_error();
-	if (PyLong_Check(item)) {
-		Py_INCREF(item);
-		return item;
-	}
-	if (PyIndex_Check(item)) {
-		result = item->ob_type->tp_as_number->nb_index(item);
-		if (result && !PyLong_Check(result)) {
-			PyErr_Format(PyExc_TypeError,
-				     "__index__ returned non-int "
-				     "(type %.200s)",
-				     result->ob_type->tp_name);
-			Py_DECREF(result);
-			return NULL;
-		}
-	}
-	else {
-		PyErr_Format(PyExc_TypeError,
-			     "'%.200s' object cannot be interpreted "
-			     "as an integer", item->ob_type->tp_name);
-	}
-	return result;
+    PyObject *result = NULL;
+    if (item == NULL)
+        return null_error();
+    if (PyLong_Check(item)) {
+        Py_INCREF(item);
+        return item;
+    }
+    if (PyIndex_Check(item)) {
+        result = item->ob_type->tp_as_number->nb_index(item);
+        if (result && !PyLong_Check(result)) {
+            PyErr_Format(PyExc_TypeError,
+                         "__index__ returned non-int "
+                         "(type %.200s)",
+                         result->ob_type->tp_name);
+            Py_DECREF(result);
+            return NULL;
+        }
+    }
+    else {
+        PyErr_Format(PyExc_TypeError,
+                     "'%.200s' object cannot be interpreted "
+                     "as an integer", item->ob_type->tp_name);
+    }
+    return result;
 }
 
 /* Return an error on Overflow only if err is not NULL*/
@@ -1237,79 +1237,79 @@ PyNumber_Index(PyObject *item)
 Py_ssize_t
 PyNumber_AsSsize_t(PyObject *item, PyObject *err)
 {
-	Py_ssize_t result;
-	PyObject *runerr;
-	PyObject *value = PyNumber_Index(item);
-	if (value == NULL)
-		return -1;
-
-	/* We're done if PyLong_AsSsize_t() returns without error. */
-	result = PyLong_AsSsize_t(value);
-	if (result != -1 || !(runerr = PyErr_Occurred()))
-		goto finish;
-
-	/* Error handling code -- only manage OverflowError differently */
-	if (!PyErr_GivenExceptionMatches(runerr, PyExc_OverflowError))
-		goto finish;
-
-	PyErr_Clear();
-	/* If no error-handling desired then the default clipping
-	   is sufficient.
-	 */
-	if (!err) {
-		assert(PyLong_Check(value));
-		/* Whether or not it is less than or equal to
-		   zero is determined by the sign of ob_size
-		*/
-		if (_PyLong_Sign(value) < 0)
-			result = PY_SSIZE_T_MIN;
-		else
-			result = PY_SSIZE_T_MAX;
-	}
-	else {
-		/* Otherwise replace the error with caller's error object. */
-		PyErr_Format(err,
-			     "cannot fit '%.200s' into an index-sized integer",
-			     item->ob_type->tp_name);
-	}
+    Py_ssize_t result;
+    PyObject *runerr;
+    PyObject *value = PyNumber_Index(item);
+    if (value == NULL)
+        return -1;
+
+    /* We're done if PyLong_AsSsize_t() returns without error. */
+    result = PyLong_AsSsize_t(value);
+    if (result != -1 || !(runerr = PyErr_Occurred()))
+        goto finish;
+
+    /* Error handling code -- only manage OverflowError differently */
+    if (!PyErr_GivenExceptionMatches(runerr, PyExc_OverflowError))
+        goto finish;
+
+    PyErr_Clear();
+    /* If no error-handling desired then the default clipping
+       is sufficient.
+     */
+    if (!err) {
+        assert(PyLong_Check(value));
+        /* Whether or not it is less than or equal to
+           zero is determined by the sign of ob_size
+        */
+        if (_PyLong_Sign(value) < 0)
+            result = PY_SSIZE_T_MIN;
+        else
+            result = PY_SSIZE_T_MAX;
+    }
+    else {
+        /* Otherwise replace the error with caller's error object. */
+        PyErr_Format(err,
+                     "cannot fit '%.200s' into an index-sized integer",
+                     item->ob_type->tp_name);
+    }
 
  finish:
-	Py_DECREF(value);
-	return result;
+    Py_DECREF(value);
+    return result;
 }
 
 
 PyObject *
 _PyNumber_ConvertIntegralToInt(PyObject *integral, const char* error_format)
 {
-	static PyObject *int_name = NULL;
-	if (int_name == NULL) {
-		int_name = PyUnicode_InternFromString("__int__");
-		if (int_name == NULL)
-			return NULL;
-	}
-
-	if (integral && !PyLong_Check(integral)) { 
-		/* Don't go through tp_as_number->nb_int to avoid
-		   hitting the classic class fallback to __trunc__. */
-		PyObject *int_func = PyObject_GetAttr(integral, int_name);
-		if (int_func == NULL) {
-			PyErr_Clear(); /* Raise a different error. */
-			goto non_integral_error;
-		}
-		Py_DECREF(integral);
-		integral = PyEval_CallObject(int_func, NULL);
-		Py_DECREF(int_func);
-		if (integral && !PyLong_Check(integral)) { 
-			goto non_integral_error;
-		}
-	}
-	return integral;
+    static PyObject *int_name = NULL;
+    if (int_name == NULL) {
+        int_name = PyUnicode_InternFromString("__int__");
+        if (int_name == NULL)
+            return NULL;
+    }
+
+    if (integral && !PyLong_Check(integral)) {
+        /* Don't go through tp_as_number->nb_int to avoid
+           hitting the classic class fallback to __trunc__. */
+        PyObject *int_func = PyObject_GetAttr(integral, int_name);
+        if (int_func == NULL) {
+            PyErr_Clear(); /* Raise a different error. */
+            goto non_integral_error;
+        }
+        Py_DECREF(integral);
+        integral = PyEval_CallObject(int_func, NULL);
+        Py_DECREF(int_func);
+        if (integral && !PyLong_Check(integral)) {
+            goto non_integral_error;
+        }
+    }
+    return integral;
 
 non_integral_error:
-	PyErr_Format(PyExc_TypeError, error_format, Py_TYPE(integral)->tp_name);
-	Py_DECREF(integral);
-	return NULL;
+    PyErr_Format(PyExc_TypeError, error_format, Py_TYPE(integral)->tp_name);
+    Py_DECREF(integral);
+    return NULL;
 }
 
 
@@ -1317,134 +1317,134 @@ non_integral_error:
 static PyObject *
 long_from_string(const char *s, Py_ssize_t len)
 {
-	char *end;
-	PyObject *x;
-
-	x = PyLong_FromString((char*)s, &end, 10);
-	if (x == NULL)
-		return NULL;
-	if (end != s + len) {
-		PyErr_SetString(PyExc_ValueError,
-				"null byte in argument for int()");
-		Py_DECREF(x);
-		return NULL;
-	}
-	return x;
+    char *end;
+    PyObject *x;
+
+    x = PyLong_FromString((char*)s, &end, 10);
+    if (x == NULL)
+        return NULL;
+    if (end != s + len) {
+        PyErr_SetString(PyExc_ValueError,
+                        "null byte in argument for int()");
+        Py_DECREF(x);
+        return NULL;
+    }
+    return x;
 }
 
 PyObject *
 PyNumber_Long(PyObject *o)
 {
-	PyNumberMethods *m;
-	static PyObject *trunc_name = NULL;
-	PyObject *trunc_func;
-	const char *buffer;
-	Py_ssize_t buffer_len;
-
-	if (trunc_name == NULL) {
-		trunc_name = PyUnicode_InternFromString("__trunc__");
-		if (trunc_name == NULL)
-			return NULL;
-	}
-
-	if (o == NULL)
-		return null_error();
-	if (PyLong_CheckExact(o)) {
-		Py_INCREF(o);
-		return o;
-	}
-	m = o->ob_type->tp_as_number;
-	if (m && m->nb_int) { /* This should include subclasses of int */
-		PyObject *res = m->nb_int(o);
-		if (res && !PyLong_Check(res)) {
-			PyErr_Format(PyExc_TypeError,
-				     "__int__ returned non-int (type %.200s)",
-				     res->ob_type->tp_name);
-			Py_DECREF(res);
-			return NULL;
-		}
-		return res;
-	}
-	if (PyLong_Check(o)) /* An int subclass without nb_int */
-		return _PyLong_Copy((PyLongObject *)o);
-	trunc_func = PyObject_GetAttr(o, trunc_name);
-	if (trunc_func) {
-		PyObject *truncated = PyEval_CallObject(trunc_func, NULL);
-		PyObject *int_instance;
-		Py_DECREF(trunc_func);
-		/* __trunc__ is specified to return an Integral type,
-		   but long() needs to return a long. */
-		int_instance = _PyNumber_ConvertIntegralToInt(
-			truncated,
-			"__trunc__ returned non-Integral (type %.200s)");
-		return int_instance;
-	}
-	PyErr_Clear();  /* It's not an error if  o.__trunc__ doesn't exist. */
-
-	if (PyBytes_Check(o))
-		/* need to do extra error checking that PyLong_FromString()
-		 * doesn't do.  In particular long('9.5') must raise an
-		 * exception, not truncate the float.
-		 */
-		return long_from_string(PyBytes_AS_STRING(o),
-					PyBytes_GET_SIZE(o));
-	if (PyUnicode_Check(o))
-		/* The above check is done in PyLong_FromUnicode(). */
-		return PyLong_FromUnicode(PyUnicode_AS_UNICODE(o),
-					  PyUnicode_GET_SIZE(o),
-					  10);
-	if (!PyObject_AsCharBuffer(o, &buffer, &buffer_len))
-		return long_from_string(buffer, buffer_len);
-
-	return type_error("int() argument must be a string or a "
-			  "number, not '%.200s'", o);
+    PyNumberMethods *m;
+    static PyObject *trunc_name = NULL;
+    PyObject *trunc_func;
+    const char *buffer;
+    Py_ssize_t buffer_len;
+
+    if (trunc_name == NULL) {
+        trunc_name = PyUnicode_InternFromString("__trunc__");
+        if (trunc_name == NULL)
+            return NULL;
+    }
+
+    if (o == NULL)
+        return null_error();
+    if (PyLong_CheckExact(o)) {
+        Py_INCREF(o);
+        return o;
+    }
+    m = o->ob_type->tp_as_number;
+    if (m && m->nb_int) { /* This should include subclasses of int */
+        PyObject *res = m->nb_int(o);
+        if (res && !PyLong_Check(res)) {
+            PyErr_Format(PyExc_TypeError,
+                         "__int__ returned non-int (type %.200s)",
+                         res->ob_type->tp_name);
+            Py_DECREF(res);
+            return NULL;
+        }
+        return res;
+    }
+    if (PyLong_Check(o)) /* An int subclass without nb_int */
+        return _PyLong_Copy((PyLongObject *)o);
+    trunc_func = PyObject_GetAttr(o, trunc_name);
+    if (trunc_func) {
+        PyObject *truncated = PyEval_CallObject(trunc_func, NULL);
+        PyObject *int_instance;
+        Py_DECREF(trunc_func);
+        /* __trunc__ is specified to return an Integral type,
+           but long() needs to return a long. */
+        int_instance = _PyNumber_ConvertIntegralToInt(
+            truncated,
+            "__trunc__ returned non-Integral (type %.200s)");
+        return int_instance;
+    }
+    PyErr_Clear();  /* It's not an error if  o.__trunc__ doesn't exist. */
+
+    if (PyBytes_Check(o))
+        /* need to do extra error checking that PyLong_FromString()
+         * doesn't do.  In particular long('9.5') must raise an
+         * exception, not truncate the float.
+         */
+        return long_from_string(PyBytes_AS_STRING(o),
+                                PyBytes_GET_SIZE(o));
+    if (PyUnicode_Check(o))
+        /* The above check is done in PyLong_FromUnicode(). */
+        return PyLong_FromUnicode(PyUnicode_AS_UNICODE(o),
+                                  PyUnicode_GET_SIZE(o),
+                                  10);
+    if (!PyObject_AsCharBuffer(o, &buffer, &buffer_len))
+        return long_from_string(buffer, buffer_len);
+
+    return type_error("int() argument must be a string or a "
+                      "number, not '%.200s'", o);
 }
 
 PyObject *
 PyNumber_Float(PyObject *o)
 {
-	PyNumberMethods *m;
-
-	if (o == NULL)
-		return null_error();
-	m = o->ob_type->tp_as_number;
-	if (m && m->nb_float) { /* This should include subclasses of float */
-		PyObject *res = m->nb_float(o);
-		if (res && !PyFloat_Check(res)) {
-			PyErr_Format(PyExc_TypeError,
-			  "__float__ returned non-float (type %.200s)",
-			  res->ob_type->tp_name);
-			Py_DECREF(res);
-			return NULL;
-		}
-		return res;
-	}
-	if (PyFloat_Check(o)) { /* A float subclass with nb_float == NULL */
-		PyFloatObject *po = (PyFloatObject *)o;
-		return PyFloat_FromDouble(po->ob_fval);
-	}
-	return PyFloat_FromString(o);
+    PyNumberMethods *m;
+
+    if (o == NULL)
+        return null_error();
+    m = o->ob_type->tp_as_number;
+    if (m && m->nb_float) { /* This should include subclasses of float */
+        PyObject *res = m->nb_float(o);
+        if (res && !PyFloat_Check(res)) {
+            PyErr_Format(PyExc_TypeError,
+              "__float__ returned non-float (type %.200s)",
+              res->ob_type->tp_name);
+            Py_DECREF(res);
+            return NULL;
+        }
+        return res;
+    }
+    if (PyFloat_Check(o)) { /* A float subclass with nb_float == NULL */
+        PyFloatObject *po = (PyFloatObject *)o;
+        return PyFloat_FromDouble(po->ob_fval);
+    }
+    return PyFloat_FromString(o);
 }
 
 
 PyObject *
 PyNumber_ToBase(PyObject *n, int base)
 {
-	PyObject *res = NULL;
-	PyObject *index = PyNumber_Index(n);
+    PyObject *res = NULL;
+    PyObject *index = PyNumber_Index(n);
 
-	if (!index)
-		return NULL;
-	if (PyLong_Check(index))
-		res = _PyLong_Format(index, base);
-	else
-		/* It should not be possible to get here, as
-		   PyNumber_Index already has a check for the same
-		   condition */
-		PyErr_SetString(PyExc_ValueError, "PyNumber_ToBase: index not "
-				"int or long");
-	Py_DECREF(index);
-	return res;
+    if (!index)
+        return NULL;
+    if (PyLong_Check(index))
+        res = _PyLong_Format(index, base);
+    else
+        /* It should not be possible to get here, as
+           PyNumber_Index already has a check for the same
+           condition */
+        PyErr_SetString(PyExc_ValueError, "PyNumber_ToBase: index not "
+                        "int or long");
+    Py_DECREF(index);
+    return res;
 }
 
 
@@ -1453,507 +1453,507 @@ PyNumber_ToBase(PyObject *n, int base)
 int
 PySequence_Check(PyObject *s)
 {
-	if (PyDict_Check(s))
-		return 0;
-	return s != NULL && s->ob_type->tp_as_sequence &&
-		s->ob_type->tp_as_sequence->sq_item != NULL;
+    if (PyDict_Check(s))
+        return 0;
+    return s != NULL && s->ob_type->tp_as_sequence &&
+        s->ob_type->tp_as_sequence->sq_item != NULL;
 }
 
 Py_ssize_t
 PySequence_Size(PyObject *s)
 {
-	PySequenceMethods *m;
+    PySequenceMethods *m;
 
-	if (s == NULL) {
-		null_error();
-		return -1;
-	}
+    if (s == NULL) {
+        null_error();
+        return -1;
+    }
 
-	m = s->ob_type->tp_as_sequence;
-	if (m && m->sq_length)
-		return m->sq_length(s);
+    m = s->ob_type->tp_as_sequence;
+    if (m && m->sq_length)
+        return m->sq_length(s);
 
-	type_error("object of type '%.200s' has no len()", s);
-	return -1;
+    type_error("object of type '%.200s' has no len()", s);
+    return -1;
 }
 
 #undef PySequence_Length
 Py_ssize_t
 PySequence_Length(PyObject *s)
 {
-	return PySequence_Size(s);
+    return PySequence_Size(s);
 }
 #define PySequence_Length PySequence_Size
 
 PyObject *
 PySequence_Concat(PyObject *s, PyObject *o)
 {
-	PySequenceMethods *m;
+    PySequenceMethods *m;
 
-	if (s == NULL || o == NULL)
-		return null_error();
+    if (s == NULL || o == NULL)
+        return null_error();
 
-	m = s->ob_type->tp_as_sequence;
-	if (m && m->sq_concat)
-		return m->sq_concat(s, o);
+    m = s->ob_type->tp_as_sequence;
+    if (m && m->sq_concat)
+        return m->sq_concat(s, o);
 
-	/* Instances of user classes defining an __add__() method only
-	   have an nb_add slot, not an sq_concat slot.	So we fall back
-	   to nb_add if both arguments appear to be sequences. */
-	if (PySequence_Check(s) && PySequence_Check(o)) {
-		PyObject *result = binary_op1(s, o, NB_SLOT(nb_add));
-		if (result != Py_NotImplemented)
-			return result;
-		Py_DECREF(result);
-	}
-	return type_error("'%.200s' object can't be concatenated", s);
+    /* Instances of user classes defining an __add__() method only
+       have an nb_add slot, not an sq_concat slot.      So we fall back
+       to nb_add if both arguments appear to be sequences. */
+    if (PySequence_Check(s) && PySequence_Check(o)) {
+        PyObject *result = binary_op1(s, o, NB_SLOT(nb_add));
+        if (result != Py_NotImplemented)
+            return result;
+        Py_DECREF(result);
+    }
+    return type_error("'%.200s' object can't be concatenated", s);
 }
 
 PyObject *
 PySequence_Repeat(PyObject *o, Py_ssize_t count)
 {
-	PySequenceMethods *m;
-
-	if (o == NULL)
-		return null_error();
-
-	m = o->ob_type->tp_as_sequence;
-	if (m && m->sq_repeat)
-		return m->sq_repeat(o, count);
-
-	/* Instances of user classes defining a __mul__() method only
-	   have an nb_multiply slot, not an sq_repeat slot. so we fall back
-	   to nb_multiply if o appears to be a sequence. */
-	if (PySequence_Check(o)) {
-		PyObject *n, *result;
-		n = PyLong_FromSsize_t(count);
-		if (n == NULL)
-			return NULL;
-		result = binary_op1(o, n, NB_SLOT(nb_multiply));
-		Py_DECREF(n);
-		if (result != Py_NotImplemented)
-			return result;
-		Py_DECREF(result);
-	}
-	return type_error("'%.200s' object can't be repeated", o);
+    PySequenceMethods *m;
+
+    if (o == NULL)
+        return null_error();
+
+    m = o->ob_type->tp_as_sequence;
+    if (m && m->sq_repeat)
+        return m->sq_repeat(o, count);
+
+    /* Instances of user classes defining a __mul__() method only
+       have an nb_multiply slot, not an sq_repeat slot. so we fall back
+       to nb_multiply if o appears to be a sequence. */
+    if (PySequence_Check(o)) {
+        PyObject *n, *result;
+        n = PyLong_FromSsize_t(count);
+        if (n == NULL)
+            return NULL;
+        result = binary_op1(o, n, NB_SLOT(nb_multiply));
+        Py_DECREF(n);
+        if (result != Py_NotImplemented)
+            return result;
+        Py_DECREF(result);
+    }
+    return type_error("'%.200s' object can't be repeated", o);
 }
 
 PyObject *
 PySequence_InPlaceConcat(PyObject *s, PyObject *o)
 {
-	PySequenceMethods *m;
+    PySequenceMethods *m;
 
-	if (s == NULL || o == NULL)
-		return null_error();
+    if (s == NULL || o == NULL)
+        return null_error();
 
-	m = s->ob_type->tp_as_sequence;
-	if (m && m->sq_inplace_concat)
-		return m->sq_inplace_concat(s, o);
-	if (m && m->sq_concat)
-		return m->sq_concat(s, o);
+    m = s->ob_type->tp_as_sequence;
+    if (m && m->sq_inplace_concat)
+        return m->sq_inplace_concat(s, o);
+    if (m && m->sq_concat)
+        return m->sq_concat(s, o);
 
-	if (PySequence_Check(s) && PySequence_Check(o)) {
-		PyObject *result = binary_iop1(s, o, NB_SLOT(nb_inplace_add),
-					       NB_SLOT(nb_add));
-		if (result != Py_NotImplemented)
-			return result;
-		Py_DECREF(result);
-	}
-	return type_error("'%.200s' object can't be concatenated", s);
+    if (PySequence_Check(s) && PySequence_Check(o)) {
+        PyObject *result = binary_iop1(s, o, NB_SLOT(nb_inplace_add),
+                                       NB_SLOT(nb_add));
+        if (result != Py_NotImplemented)
+            return result;
+        Py_DECREF(result);
+    }
+    return type_error("'%.200s' object can't be concatenated", s);
 }
 
 PyObject *
 PySequence_InPlaceRepeat(PyObject *o, Py_ssize_t count)
 {
-	PySequenceMethods *m;
-
-	if (o == NULL)
-		return null_error();
-
-	m = o->ob_type->tp_as_sequence;
-	if (m && m->sq_inplace_repeat)
-		return m->sq_inplace_repeat(o, count);
-	if (m && m->sq_repeat)
-		return m->sq_repeat(o, count);
-
-	if (PySequence_Check(o)) {
-		PyObject *n, *result;
-		n = PyLong_FromSsize_t(count);
-		if (n == NULL)
-			return NULL;
-		result = binary_iop1(o, n, NB_SLOT(nb_inplace_multiply),
-				     NB_SLOT(nb_multiply));
-		Py_DECREF(n);
-		if (result != Py_NotImplemented)
-			return result;
-		Py_DECREF(result);
-	}
-	return type_error("'%.200s' object can't be repeated", o);
+    PySequenceMethods *m;
+
+    if (o == NULL)
+        return null_error();
+
+    m = o->ob_type->tp_as_sequence;
+    if (m && m->sq_inplace_repeat)
+        return m->sq_inplace_repeat(o, count);
+    if (m && m->sq_repeat)
+        return m->sq_repeat(o, count);
+
+    if (PySequence_Check(o)) {
+        PyObject *n, *result;
+        n = PyLong_FromSsize_t(count);
+        if (n == NULL)
+            return NULL;
+        result = binary_iop1(o, n, NB_SLOT(nb_inplace_multiply),
+                             NB_SLOT(nb_multiply));
+        Py_DECREF(n);
+        if (result != Py_NotImplemented)
+            return result;
+        Py_DECREF(result);
+    }
+    return type_error("'%.200s' object can't be repeated", o);
 }
 
 PyObject *
 PySequence_GetItem(PyObject *s, Py_ssize_t i)
 {
-	PySequenceMethods *m;
-
-	if (s == NULL)
-		return null_error();
-
-	m = s->ob_type->tp_as_sequence;
-	if (m && m->sq_item) {
-		if (i < 0) {
-			if (m->sq_length) {
-				Py_ssize_t l = (*m->sq_length)(s);
-				if (l < 0)
-					return NULL;
-				i += l;
-			}
-		}
-		return m->sq_item(s, i);
-	}
+    PySequenceMethods *m;
+
+    if (s == NULL)
+        return null_error();
+
+    m = s->ob_type->tp_as_sequence;
+    if (m && m->sq_item) {
+        if (i < 0) {
+            if (m->sq_length) {
+                Py_ssize_t l = (*m->sq_length)(s);
+                if (l < 0)
+                    return NULL;
+                i += l;
+            }
+        }
+        return m->sq_item(s, i);
+    }
 
-	return type_error("'%.200s' object does not support indexing", s);
+    return type_error("'%.200s' object does not support indexing", s);
 }
 
 PyObject *
 PySequence_GetSlice(PyObject *s, Py_ssize_t i1, Py_ssize_t i2)
 {
-	PyMappingMethods *mp;
+    PyMappingMethods *mp;
 
-	if (!s) return null_error();
+    if (!s) return null_error();
 
-	mp = s->ob_type->tp_as_mapping;
-	if (mp->mp_subscript) {
-		PyObject *res;
-		PyObject *slice = _PySlice_FromIndices(i1, i2);
-		if (!slice)
-			return NULL;
-		res = mp->mp_subscript(s, slice);
-		Py_DECREF(slice);
-		return res;
-	}
+    mp = s->ob_type->tp_as_mapping;
+    if (mp->mp_subscript) {
+        PyObject *res;
+        PyObject *slice = _PySlice_FromIndices(i1, i2);
+        if (!slice)
+            return NULL;
+        res = mp->mp_subscript(s, slice);
+        Py_DECREF(slice);
+        return res;
+    }
 
-	return type_error("'%.200s' object is unsliceable", s);
+    return type_error("'%.200s' object is unsliceable", s);
 }
 
 int
 PySequence_SetItem(PyObject *s, Py_ssize_t i, PyObject *o)
 {
-	PySequenceMethods *m;
+    PySequenceMethods *m;
 
-	if (s == NULL) {
-		null_error();
-		return -1;
-	}
+    if (s == NULL) {
+        null_error();
+        return -1;
+    }
 
-	m = s->ob_type->tp_as_sequence;
-	if (m && m->sq_ass_item) {
-		if (i < 0) {
-			if (m->sq_length) {
-				Py_ssize_t l = (*m->sq_length)(s);
-				if (l < 0)
-					return -1;
-				i += l;
-			}
-		}
-		return m->sq_ass_item(s, i, o);
-	}
+    m = s->ob_type->tp_as_sequence;
+    if (m && m->sq_ass_item) {
+        if (i < 0) {
+            if (m->sq_length) {
+                Py_ssize_t l = (*m->sq_length)(s);
+                if (l < 0)
+                    return -1;
+                i += l;
+            }
+        }
+        return m->sq_ass_item(s, i, o);
+    }
 
-	type_error("'%.200s' object does not support item assignment", s);
-	return -1;
+    type_error("'%.200s' object does not support item assignment", s);
+    return -1;
 }
 
 int
 PySequence_DelItem(PyObject *s, Py_ssize_t i)
 {
-	PySequenceMethods *m;
+    PySequenceMethods *m;
 
-	if (s == NULL) {
-		null_error();
-		return -1;
-	}
+    if (s == NULL) {
+        null_error();
+        return -1;
+    }
 
-	m = s->ob_type->tp_as_sequence;
-	if (m && m->sq_ass_item) {
-		if (i < 0) {
-			if (m->sq_length) {
-				Py_ssize_t l = (*m->sq_length)(s);
-				if (l < 0)
-					return -1;
-				i += l;
-			}
-		}
-		return m->sq_ass_item(s, i, (PyObject *)NULL);
-	}
+    m = s->ob_type->tp_as_sequence;
+    if (m && m->sq_ass_item) {
+        if (i < 0) {
+            if (m->sq_length) {
+                Py_ssize_t l = (*m->sq_length)(s);
+                if (l < 0)
+                    return -1;
+                i += l;
+            }
+        }
+        return m->sq_ass_item(s, i, (PyObject *)NULL);
+    }
 
-	type_error("'%.200s' object doesn't support item deletion", s);
-	return -1;
+    type_error("'%.200s' object doesn't support item deletion", s);
+    return -1;
 }
 
 int
 PySequence_SetSlice(PyObject *s, Py_ssize_t i1, Py_ssize_t i2, PyObject *o)
 {
-	PyMappingMethods *mp;
+    PyMappingMethods *mp;
 
-	if (s == NULL) {
-		null_error();
-		return -1;
-	}
+    if (s == NULL) {
+        null_error();
+        return -1;
+    }
 
-	mp = s->ob_type->tp_as_mapping;
-	if (mp->mp_ass_subscript) {
-		int res;
-		PyObject *slice = _PySlice_FromIndices(i1, i2);
-		if (!slice)
-			return -1;
-		res = mp->mp_ass_subscript(s, slice, o);
-		Py_DECREF(slice);
-		return res;
-	}
+    mp = s->ob_type->tp_as_mapping;
+    if (mp->mp_ass_subscript) {
+        int res;
+        PyObject *slice = _PySlice_FromIndices(i1, i2);
+        if (!slice)
+            return -1;
+        res = mp->mp_ass_subscript(s, slice, o);
+        Py_DECREF(slice);
+        return res;
+    }
 
-	type_error("'%.200s' object doesn't support slice assignment", s);
-	return -1;
+    type_error("'%.200s' object doesn't support slice assignment", s);
+    return -1;
 }
 
 int
 PySequence_DelSlice(PyObject *s, Py_ssize_t i1, Py_ssize_t i2)
 {
-	PyMappingMethods *mp;
+    PyMappingMethods *mp;
 
-	if (s == NULL) {
-		null_error();
-		return -1;
-	}
+    if (s == NULL) {
+        null_error();
+        return -1;
+    }
 
-	mp = s->ob_type->tp_as_mapping;
-	if (mp->mp_ass_subscript) {
-		int res;
-		PyObject *slice = _PySlice_FromIndices(i1, i2);
-		if (!slice)
-			return -1;
-		res = mp->mp_ass_subscript(s, slice, NULL);
-		Py_DECREF(slice);
-		return res;
-	}
-	type_error("'%.200s' object doesn't support slice deletion", s);
-	return -1;
+    mp = s->ob_type->tp_as_mapping;
+    if (mp->mp_ass_subscript) {
+        int res;
+        PyObject *slice = _PySlice_FromIndices(i1, i2);
+        if (!slice)
+            return -1;
+        res = mp->mp_ass_subscript(s, slice, NULL);
+        Py_DECREF(slice);
+        return res;
+    }
+    type_error("'%.200s' object doesn't support slice deletion", s);
+    return -1;
 }
 
 PyObject *
 PySequence_Tuple(PyObject *v)
 {
-	PyObject *it;  /* iter(v) */
-	Py_ssize_t n;	      /* guess for result tuple size */
-	PyObject *result = NULL;
-	Py_ssize_t j;
-
-	if (v == NULL)
-		return null_error();
-
-	/* Special-case the common tuple and list cases, for efficiency. */
-	if (PyTuple_CheckExact(v)) {
-		/* Note that we can't know whether it's safe to return
-		   a tuple *subclass* instance as-is, hence the restriction
-		   to exact tuples here.  In contrast, lists always make
-		   a copy, so there's no need for exactness below. */
-		Py_INCREF(v);
-		return v;
-	}
-	if (PyList_Check(v))
-		return PyList_AsTuple(v);
-
-	/* Get iterator. */
-	it = PyObject_GetIter(v);
-	if (it == NULL)
-		return NULL;
-
-	/* Guess result size and allocate space. */
-	n = _PyObject_LengthHint(v, 10);
-	if (n == -1)
-		goto Fail;
-	result = PyTuple_New(n);
-	if (result == NULL)
-		goto Fail;
-
-	/* Fill the tuple. */
-	for (j = 0; ; ++j) {
-		PyObject *item = PyIter_Next(it);
-		if (item == NULL) {
-			if (PyErr_Occurred())
-				goto Fail;
-			break;
-		}
-		if (j >= n) {
-			Py_ssize_t oldn = n;
-			/* The over-allocation strategy can grow a bit faster
-			   than for lists because unlike lists the
-			   over-allocation isn't permanent -- we reclaim
-			   the excess before the end of this routine.
-			   So, grow by ten and then add 25%.
-			*/
-			n += 10;
-			n += n >> 2;
-			if (n < oldn) {
-				/* Check for overflow */
-				PyErr_NoMemory();
-				Py_DECREF(item);
-				goto Fail;
-			}
-			if (_PyTuple_Resize(&result, n) != 0) {
-				Py_DECREF(item);
-				goto Fail;
-			}
-		}
-		PyTuple_SET_ITEM(result, j, item);
-	}
-
-	/* Cut tuple back if guess was too large. */
-	if (j < n &&
-	    _PyTuple_Resize(&result, j) != 0)
-		goto Fail;
-
-	Py_DECREF(it);
-	return result;
+    PyObject *it;  /* iter(v) */
+    Py_ssize_t n;             /* guess for result tuple size */
+    PyObject *result = NULL;
+    Py_ssize_t j;
+
+    if (v == NULL)
+        return null_error();
+
+    /* Special-case the common tuple and list cases, for efficiency. */
+    if (PyTuple_CheckExact(v)) {
+        /* Note that we can't know whether it's safe to return
+           a tuple *subclass* instance as-is, hence the restriction
+           to exact tuples here.  In contrast, lists always make
+           a copy, so there's no need for exactness below. */
+        Py_INCREF(v);
+        return v;
+    }
+    if (PyList_Check(v))
+        return PyList_AsTuple(v);
+
+    /* Get iterator. */
+    it = PyObject_GetIter(v);
+    if (it == NULL)
+        return NULL;
+
+    /* Guess result size and allocate space. */
+    n = _PyObject_LengthHint(v, 10);
+    if (n == -1)
+        goto Fail;
+    result = PyTuple_New(n);
+    if (result == NULL)
+        goto Fail;
+
+    /* Fill the tuple. */
+    for (j = 0; ; ++j) {
+        PyObject *item = PyIter_Next(it);
+        if (item == NULL) {
+            if (PyErr_Occurred())
+                goto Fail;
+            break;
+        }
+        if (j >= n) {
+            Py_ssize_t oldn = n;
+            /* The over-allocation strategy can grow a bit faster
+               than for lists because unlike lists the
+               over-allocation isn't permanent -- we reclaim
+               the excess before the end of this routine.
+               So, grow by ten and then add 25%.
+            */
+            n += 10;
+            n += n >> 2;
+            if (n < oldn) {
+                /* Check for overflow */
+                PyErr_NoMemory();
+                Py_DECREF(item);
+                goto Fail;
+            }
+            if (_PyTuple_Resize(&result, n) != 0) {
+                Py_DECREF(item);
+                goto Fail;
+            }
+        }
+        PyTuple_SET_ITEM(result, j, item);
+    }
+
+    /* Cut tuple back if guess was too large. */
+    if (j < n &&
+        _PyTuple_Resize(&result, j) != 0)
+        goto Fail;
+
+    Py_DECREF(it);
+    return result;
 
 Fail:
-	Py_XDECREF(result);
-	Py_DECREF(it);
-	return NULL;
+    Py_XDECREF(result);
+    Py_DECREF(it);
+    return NULL;
 }
 
 PyObject *
 PySequence_List(PyObject *v)
 {
-	PyObject *result;  /* result list */
-	PyObject *rv;	   /* return value from PyList_Extend */
+    PyObject *result;  /* result list */
+    PyObject *rv;          /* return value from PyList_Extend */
 
-	if (v == NULL)
-		return null_error();
+    if (v == NULL)
+        return null_error();
 
-	result = PyList_New(0);
-	if (result == NULL)
-		return NULL;
+    result = PyList_New(0);
+    if (result == NULL)
+        return NULL;
 
-	rv = _PyList_Extend((PyListObject *)result, v);
-	if (rv == NULL) {
-		Py_DECREF(result);
-		return NULL;
-	}
-	Py_DECREF(rv);
-	return result;
+    rv = _PyList_Extend((PyListObject *)result, v);
+    if (rv == NULL) {
+        Py_DECREF(result);
+        return NULL;
+    }
+    Py_DECREF(rv);
+    return result;
 }
 
 PyObject *
 PySequence_Fast(PyObject *v, const char *m)
 {
-	PyObject *it;
+    PyObject *it;
 
-	if (v == NULL)
-		return null_error();
+    if (v == NULL)
+        return null_error();
 
-	if (PyList_CheckExact(v) || PyTuple_CheckExact(v)) {
-		Py_INCREF(v);
-		return v;
-	}
+    if (PyList_CheckExact(v) || PyTuple_CheckExact(v)) {
+        Py_INCREF(v);
+        return v;
+    }
 
-	it = PyObject_GetIter(v);
-	if (it == NULL) {
-		if (PyErr_ExceptionMatches(PyExc_TypeError))
-			PyErr_SetString(PyExc_TypeError, m);
-		return NULL;
-	}
+    it = PyObject_GetIter(v);
+    if (it == NULL) {
+        if (PyErr_ExceptionMatches(PyExc_TypeError))
+            PyErr_SetString(PyExc_TypeError, m);
+        return NULL;
+    }
 
-	v = PySequence_List(it);
-	Py_DECREF(it);
+    v = PySequence_List(it);
+    Py_DECREF(it);
 
-	return v;
+    return v;
 }
 
 /* Iterate over seq.  Result depends on the operation:
-   PY_ITERSEARCH_COUNT:	 -1 if error, else # of times obj appears in seq.
-   PY_ITERSEARCH_INDEX:	 0-based index of first occurrence of obj in seq;
-	set ValueError and return -1 if none found; also return -1 on error.
+   PY_ITERSEARCH_COUNT:  -1 if error, else # of times obj appears in seq.
+   PY_ITERSEARCH_INDEX:  0-based index of first occurrence of obj in seq;
+    set ValueError and return -1 if none found; also return -1 on error.
    Py_ITERSEARCH_CONTAINS:  return 1 if obj in seq, else 0; -1 on error.
 */
 Py_ssize_t
 _PySequence_IterSearch(PyObject *seq, PyObject *obj, int operation)
 {
-	Py_ssize_t n;
-	int wrapped;  /* for PY_ITERSEARCH_INDEX, true iff n wrapped around */
-	PyObject *it;  /* iter(seq) */
-
-	if (seq == NULL || obj == NULL) {
-		null_error();
-		return -1;
-	}
-
-	it = PyObject_GetIter(seq);
-	if (it == NULL) {
-		type_error("argument of type '%.200s' is not iterable", seq);
-		return -1;
-	}
-
-	n = wrapped = 0;
-	for (;;) {
-		int cmp;
-		PyObject *item = PyIter_Next(it);
-		if (item == NULL) {
-			if (PyErr_Occurred())
-				goto Fail;
-			break;
-		}
-
-		cmp = PyObject_RichCompareBool(obj, item, Py_EQ);
-		Py_DECREF(item);
-		if (cmp < 0)
-			goto Fail;
-		if (cmp > 0) {
-			switch (operation) {
-			case PY_ITERSEARCH_COUNT:
-				if (n == PY_SSIZE_T_MAX) {
-					PyErr_SetString(PyExc_OverflowError,
-					       "count exceeds C integer size");
-					goto Fail;
-				}
-				++n;
-				break;
-
-			case PY_ITERSEARCH_INDEX:
-				if (wrapped) {
-					PyErr_SetString(PyExc_OverflowError,
-					       "index exceeds C integer size");
-					goto Fail;
-				}
-				goto Done;
-
-			case PY_ITERSEARCH_CONTAINS:
-				n = 1;
-				goto Done;
-
-			default:
-				assert(!"unknown operation");
-			}
-		}
-
-		if (operation == PY_ITERSEARCH_INDEX) {
-			if (n == PY_SSIZE_T_MAX)
-				wrapped = 1;
-			++n;
-		}
-	}
-
-	if (operation != PY_ITERSEARCH_INDEX)
-		goto Done;
-
-	PyErr_SetString(PyExc_ValueError,
-			"sequence.index(x): x not in sequence");
-	/* fall into failure code */
+    Py_ssize_t n;
+    int wrapped;  /* for PY_ITERSEARCH_INDEX, true iff n wrapped around */
+    PyObject *it;  /* iter(seq) */
+
+    if (seq == NULL || obj == NULL) {
+        null_error();
+        return -1;
+    }
+
+    it = PyObject_GetIter(seq);
+    if (it == NULL) {
+        type_error("argument of type '%.200s' is not iterable", seq);
+        return -1;
+    }
+
+    n = wrapped = 0;
+    for (;;) {
+        int cmp;
+        PyObject *item = PyIter_Next(it);
+        if (item == NULL) {
+            if (PyErr_Occurred())
+                goto Fail;
+            break;
+        }
+
+        cmp = PyObject_RichCompareBool(obj, item, Py_EQ);
+        Py_DECREF(item);
+        if (cmp < 0)
+            goto Fail;
+        if (cmp > 0) {
+            switch (operation) {
+            case PY_ITERSEARCH_COUNT:
+                if (n == PY_SSIZE_T_MAX) {
+                    PyErr_SetString(PyExc_OverflowError,
+                           "count exceeds C integer size");
+                    goto Fail;
+                }
+                ++n;
+                break;
+
+            case PY_ITERSEARCH_INDEX:
+                if (wrapped) {
+                    PyErr_SetString(PyExc_OverflowError,
+                           "index exceeds C integer size");
+                    goto Fail;
+                }
+                goto Done;
+
+            case PY_ITERSEARCH_CONTAINS:
+                n = 1;
+                goto Done;
+
+            default:
+                assert(!"unknown operation");
+            }
+        }
+
+        if (operation == PY_ITERSEARCH_INDEX) {
+            if (n == PY_SSIZE_T_MAX)
+                wrapped = 1;
+            ++n;
+        }
+    }
+
+    if (operation != PY_ITERSEARCH_INDEX)
+        goto Done;
+
+    PyErr_SetString(PyExc_ValueError,
+                    "sequence.index(x): x not in sequence");
+    /* fall into failure code */
 Fail:
-	n = -1;
-	/* fall through */
+    n = -1;
+    /* fall through */
 Done:
-	Py_DECREF(it);
-	return n;
+    Py_DECREF(it);
+    return n;
 
 }
 
@@ -1961,7 +1961,7 @@ Done:
 Py_ssize_t
 PySequence_Count(PyObject *s, PyObject *o)
 {
-	return _PySequence_IterSearch(s, o, PY_ITERSEARCH_COUNT);
+    return _PySequence_IterSearch(s, o, PY_ITERSEARCH_COUNT);
 }
 
 /* Return -1 if error; 1 if ob in seq; 0 if ob not in seq.
@@ -1970,12 +1970,12 @@ PySequence_Count(PyObject *s, PyObject *o)
 int
 PySequence_Contains(PyObject *seq, PyObject *ob)
 {
-	Py_ssize_t result;
-	PySequenceMethods *sqm = seq->ob_type->tp_as_sequence;
-	if (sqm != NULL && sqm->sq_contains != NULL)
-		return (*sqm->sq_contains)(seq, ob);
-	result = _PySequence_IterSearch(seq, ob, PY_ITERSEARCH_CONTAINS);
-	return Py_SAFE_DOWNCAST(result, Py_ssize_t, int);
+    Py_ssize_t result;
+    PySequenceMethods *sqm = seq->ob_type->tp_as_sequence;
+    if (sqm != NULL && sqm->sq_contains != NULL)
+        return (*sqm->sq_contains)(seq, ob);
+    result = _PySequence_IterSearch(seq, ob, PY_ITERSEARCH_CONTAINS);
+    return Py_SAFE_DOWNCAST(result, Py_ssize_t, int);
 }
 
 /* Backwards compatibility */
@@ -1983,13 +1983,13 @@ PySequence_Contains(PyObject *seq, PyObject *ob)
 int
 PySequence_In(PyObject *w, PyObject *v)
 {
-	return PySequence_Contains(w, v);
+    return PySequence_Contains(w, v);
 }
 
 Py_ssize_t
 PySequence_Index(PyObject *s, PyObject *o)
 {
-	return _PySequence_IterSearch(s, o, PY_ITERSEARCH_INDEX);
+    return _PySequence_IterSearch(s, o, PY_ITERSEARCH_INDEX);
 }
 
 /* Operations on mappings */
@@ -1997,145 +1997,145 @@ PySequence_Index(PyObject *s, PyObject *o)
 int
 PyMapping_Check(PyObject *o)
 {
-	return	o && o->ob_type->tp_as_mapping &&
-		o->ob_type->tp_as_mapping->mp_subscript;
+    return      o && o->ob_type->tp_as_mapping &&
+        o->ob_type->tp_as_mapping->mp_subscript;
 }
 
 Py_ssize_t
 PyMapping_Size(PyObject *o)
 {
-	PyMappingMethods *m;
+    PyMappingMethods *m;
 
-	if (o == NULL) {
-		null_error();
-		return -1;
-	}
+    if (o == NULL) {
+        null_error();
+        return -1;
+    }
 
-	m = o->ob_type->tp_as_mapping;
-	if (m && m->mp_length)
-		return m->mp_length(o);
+    m = o->ob_type->tp_as_mapping;
+    if (m && m->mp_length)
+        return m->mp_length(o);
 
-	type_error("object of type '%.200s' has no len()", o);
-	return -1;
+    type_error("object of type '%.200s' has no len()", o);
+    return -1;
 }
 
 #undef PyMapping_Length
 Py_ssize_t
 PyMapping_Length(PyObject *o)
 {
-	return PyMapping_Size(o);
+    return PyMapping_Size(o);
 }
 #define PyMapping_Length PyMapping_Size
 
 PyObject *
 PyMapping_GetItemString(PyObject *o, char *key)
 {
-	PyObject *okey, *r;
+    PyObject *okey, *r;
 
-	if (key == NULL)
-		return null_error();
+    if (key == NULL)
+        return null_error();
 
-	okey = PyUnicode_FromString(key);
-	if (okey == NULL)
-		return NULL;
-	r = PyObject_GetItem(o, okey);
-	Py_DECREF(okey);
-	return r;
+    okey = PyUnicode_FromString(key);
+    if (okey == NULL)
+        return NULL;
+    r = PyObject_GetItem(o, okey);
+    Py_DECREF(okey);
+    return r;
 }
 
 int
 PyMapping_SetItemString(PyObject *o, char *key, PyObject *value)
 {
-	PyObject *okey;
-	int r;
+    PyObject *okey;
+    int r;
 
-	if (key == NULL) {
-		null_error();
-		return -1;
-	}
+    if (key == NULL) {
+        null_error();
+        return -1;
+    }
 
-	okey = PyUnicode_FromString(key);
-	if (okey == NULL)
-		return -1;
-	r = PyObject_SetItem(o, okey, value);
-	Py_DECREF(okey);
-	return r;
+    okey = PyUnicode_FromString(key);
+    if (okey == NULL)
+        return -1;
+    r = PyObject_SetItem(o, okey, value);
+    Py_DECREF(okey);
+    return r;
 }
 
 int
 PyMapping_HasKeyString(PyObject *o, char *key)
 {
-	PyObject *v;
+    PyObject *v;
 
-	v = PyMapping_GetItemString(o, key);
-	if (v) {
-		Py_DECREF(v);
-		return 1;
-	}
-	PyErr_Clear();
-	return 0;
+    v = PyMapping_GetItemString(o, key);
+    if (v) {
+        Py_DECREF(v);
+        return 1;
+    }
+    PyErr_Clear();
+    return 0;
 }
 
 int
 PyMapping_HasKey(PyObject *o, PyObject *key)
 {
-	PyObject *v;
+    PyObject *v;
 
-	v = PyObject_GetItem(o, key);
-	if (v) {
-		Py_DECREF(v);
-		return 1;
-	}
-	PyErr_Clear();
-	return 0;
+    v = PyObject_GetItem(o, key);
+    if (v) {
+        Py_DECREF(v);
+        return 1;
+    }
+    PyErr_Clear();
+    return 0;
 }
 
 PyObject *
 PyMapping_Keys(PyObject *o)
 {
-	PyObject *keys;
-	PyObject *fast;
+    PyObject *keys;
+    PyObject *fast;
 
-	if (PyDict_CheckExact(o))
-		return PyDict_Keys(o);
-	keys = PyObject_CallMethod(o, "keys", NULL);
-	if (keys == NULL)
-		return NULL;
-	fast = PySequence_Fast(keys, "o.keys() are not iterable");
-	Py_DECREF(keys);
-	return fast;
+    if (PyDict_CheckExact(o))
+        return PyDict_Keys(o);
+    keys = PyObject_CallMethod(o, "keys", NULL);
+    if (keys == NULL)
+        return NULL;
+    fast = PySequence_Fast(keys, "o.keys() are not iterable");
+    Py_DECREF(keys);
+    return fast;
 }
 
 PyObject *
 PyMapping_Items(PyObject *o)
 {
-	PyObject *items;
-	PyObject *fast;
+    PyObject *items;
+    PyObject *fast;
 
-	if (PyDict_CheckExact(o))
-		return PyDict_Items(o);
-	items = PyObject_CallMethod(o, "items", NULL);
-	if (items == NULL)
-		return NULL;
-	fast = PySequence_Fast(items, "o.items() are not iterable");
-	Py_DECREF(items);
-	return fast;
+    if (PyDict_CheckExact(o))
+        return PyDict_Items(o);
+    items = PyObject_CallMethod(o, "items", NULL);
+    if (items == NULL)
+        return NULL;
+    fast = PySequence_Fast(items, "o.items() are not iterable");
+    Py_DECREF(items);
+    return fast;
 }
 
 PyObject *
 PyMapping_Values(PyObject *o)
 {
-	PyObject *values;
-	PyObject *fast;
+    PyObject *values;
+    PyObject *fast;
 
-	if (PyDict_CheckExact(o))
-		return PyDict_Values(o);
-	values = PyObject_CallMethod(o, "values", NULL);
-	if (values == NULL)
-		return NULL;
-	fast = PySequence_Fast(values, "o.values() are not iterable");
-	Py_DECREF(values);
-	return fast;
+    if (PyDict_CheckExact(o))
+        return PyDict_Values(o);
+    values = PyObject_CallMethod(o, "values", NULL);
+    if (values == NULL)
+        return NULL;
+    fast = PySequence_Fast(values, "o.values() are not iterable");
+    Py_DECREF(values);
+    return fast;
 }
 
 /* Operations on callable objects */
@@ -2145,253 +2145,253 @@ PyMapping_Values(PyObject *o)
 PyObject *
 PyObject_CallObject(PyObject *o, PyObject *a)
 {
-	return PyEval_CallObjectWithKeywords(o, a, NULL);
+    return PyEval_CallObjectWithKeywords(o, a, NULL);
 }
 
 PyObject *
 PyObject_Call(PyObject *func, PyObject *arg, PyObject *kw)
 {
-	ternaryfunc call;
-
-	if ((call = func->ob_type->tp_call) != NULL) {
-		PyObject *result;
-		if (Py_EnterRecursiveCall(" while calling a Python object"))
-		    return NULL;
-		result = (*call)(func, arg, kw);
-		Py_LeaveRecursiveCall();
-		if (result == NULL && !PyErr_Occurred())
-			PyErr_SetString(
-				PyExc_SystemError,
-				"NULL result without error in PyObject_Call");
-		return result;
-	}
-	PyErr_Format(PyExc_TypeError, "'%.200s' object is not callable",
-		     func->ob_type->tp_name);
-	return NULL;
+    ternaryfunc call;
+
+    if ((call = func->ob_type->tp_call) != NULL) {
+        PyObject *result;
+        if (Py_EnterRecursiveCall(" while calling a Python object"))
+            return NULL;
+        result = (*call)(func, arg, kw);
+        Py_LeaveRecursiveCall();
+        if (result == NULL && !PyErr_Occurred())
+            PyErr_SetString(
+                PyExc_SystemError,
+                "NULL result without error in PyObject_Call");
+        return result;
+    }
+    PyErr_Format(PyExc_TypeError, "'%.200s' object is not callable",
+                 func->ob_type->tp_name);
+    return NULL;
 }
 
 static PyObject*
 call_function_tail(PyObject *callable, PyObject *args)
 {
-	PyObject *retval;
+    PyObject *retval;
 
-	if (args == NULL)
-		return NULL;
+    if (args == NULL)
+        return NULL;
 
-	if (!PyTuple_Check(args)) {
-		PyObject *a;
+    if (!PyTuple_Check(args)) {
+        PyObject *a;
 
-		a = PyTuple_New(1);
-		if (a == NULL) {
-			Py_DECREF(args);
-			return NULL;
-		}
-		PyTuple_SET_ITEM(a, 0, args);
-		args = a;
-	}
-	retval = PyObject_Call(callable, args, NULL);
+        a = PyTuple_New(1);
+        if (a == NULL) {
+            Py_DECREF(args);
+            return NULL;
+        }
+        PyTuple_SET_ITEM(a, 0, args);
+        args = a;
+    }
+    retval = PyObject_Call(callable, args, NULL);
 
-	Py_DECREF(args);
+    Py_DECREF(args);
 
-	return retval;
+    return retval;
 }
 
 PyObject *
 PyObject_CallFunction(PyObject *callable, char *format, ...)
 {
-	va_list va;
-	PyObject *args;
+    va_list va;
+    PyObject *args;
 
-	if (callable == NULL)
-		return null_error();
+    if (callable == NULL)
+        return null_error();
 
-	if (format && *format) {
-		va_start(va, format);
-		args = Py_VaBuildValue(format, va);
-		va_end(va);
-	}
-	else
-		args = PyTuple_New(0);
+    if (format && *format) {
+        va_start(va, format);
+        args = Py_VaBuildValue(format, va);
+        va_end(va);
+    }
+    else
+        args = PyTuple_New(0);
 
-	return call_function_tail(callable, args);
+    return call_function_tail(callable, args);
 }
 
 PyObject *
 _PyObject_CallFunction_SizeT(PyObject *callable, char *format, ...)
 {
-	va_list va;
-	PyObject *args;
+    va_list va;
+    PyObject *args;
 
-	if (callable == NULL)
-		return null_error();
+    if (callable == NULL)
+        return null_error();
 
-	if (format && *format) {
-		va_start(va, format);
-		args = _Py_VaBuildValue_SizeT(format, va);
-		va_end(va);
-	}
-	else
-		args = PyTuple_New(0);
+    if (format && *format) {
+        va_start(va, format);
+        args = _Py_VaBuildValue_SizeT(format, va);
+        va_end(va);
+    }
+    else
+        args = PyTuple_New(0);
 
-	return call_function_tail(callable, args);
+    return call_function_tail(callable, args);
 }
 
 PyObject *
 PyObject_CallMethod(PyObject *o, char *name, char *format, ...)
 {
-	va_list va;
-	PyObject *args;
-	PyObject *func = NULL;
-	PyObject *retval = NULL;
+    va_list va;
+    PyObject *args;
+    PyObject *func = NULL;
+    PyObject *retval = NULL;
 
-	if (o == NULL || name == NULL)
-		return null_error();
+    if (o == NULL || name == NULL)
+        return null_error();
 
-	func = PyObject_GetAttrString(o, name);
-	if (func == NULL) {
-		PyErr_SetString(PyExc_AttributeError, name);
-		return 0;
-	}
+    func = PyObject_GetAttrString(o, name);
+    if (func == NULL) {
+        PyErr_SetString(PyExc_AttributeError, name);
+        return 0;
+    }
 
-	if (!PyCallable_Check(func)) {
-		type_error("attribute of type '%.200s' is not callable", func);
-		goto exit;
-	}
+    if (!PyCallable_Check(func)) {
+        type_error("attribute of type '%.200s' is not callable", func);
+        goto exit;
+    }
 
-	if (format && *format) {
-		va_start(va, format);
-		args = Py_VaBuildValue(format, va);
-		va_end(va);
-	}
-	else
-		args = PyTuple_New(0);
+    if (format && *format) {
+        va_start(va, format);
+        args = Py_VaBuildValue(format, va);
+        va_end(va);
+    }
+    else
+        args = PyTuple_New(0);
 
-	retval = call_function_tail(func, args);
+    retval = call_function_tail(func, args);
 
   exit:
-	/* args gets consumed in call_function_tail */
-	Py_XDECREF(func);
+    /* args gets consumed in call_function_tail */
+    Py_XDECREF(func);
 
-	return retval;
+    return retval;
 }
 
 PyObject *
 _PyObject_CallMethod_SizeT(PyObject *o, char *name, char *format, ...)
 {
-	va_list va;
-	PyObject *args;
-	PyObject *func = NULL;
-	PyObject *retval = NULL;
+    va_list va;
+    PyObject *args;
+    PyObject *func = NULL;
+    PyObject *retval = NULL;
 
-	if (o == NULL || name == NULL)
-		return null_error();
+    if (o == NULL || name == NULL)
+        return null_error();
 
-	func = PyObject_GetAttrString(o, name);
-	if (func == NULL) {
-		PyErr_SetString(PyExc_AttributeError, name);
-		return 0;
-	}
+    func = PyObject_GetAttrString(o, name);
+    if (func == NULL) {
+        PyErr_SetString(PyExc_AttributeError, name);
+        return 0;
+    }
 
-	if (!PyCallable_Check(func)) {
-		type_error("attribute of type '%.200s' is not callable", func);
-		goto exit;
-	}
+    if (!PyCallable_Check(func)) {
+        type_error("attribute of type '%.200s' is not callable", func);
+        goto exit;
+    }
 
-	if (format && *format) {
-		va_start(va, format);
-		args = _Py_VaBuildValue_SizeT(format, va);
-		va_end(va);
-	}
-	else
-		args = PyTuple_New(0);
+    if (format && *format) {
+        va_start(va, format);
+        args = _Py_VaBuildValue_SizeT(format, va);
+        va_end(va);
+    }
+    else
+        args = PyTuple_New(0);
 
-	retval = call_function_tail(func, args);
+    retval = call_function_tail(func, args);
 
   exit:
-	/* args gets consumed in call_function_tail */
-	Py_XDECREF(func);
+    /* args gets consumed in call_function_tail */
+    Py_XDECREF(func);
 
-	return retval;
+    return retval;
 }
 
 
 static PyObject *
 objargs_mktuple(va_list va)
 {
-	int i, n = 0;
-	va_list countva;
-	PyObject *result, *tmp;
+    int i, n = 0;
+    va_list countva;
+    PyObject *result, *tmp;
 
 #ifdef VA_LIST_IS_ARRAY
-	memcpy(countva, va, sizeof(va_list));
+    memcpy(countva, va, sizeof(va_list));
 #else
 #ifdef __va_copy
-	__va_copy(countva, va);
+    __va_copy(countva, va);
 #else
-	countva = va;
+    countva = va;
 #endif
 #endif
 
-	while (((PyObject *)va_arg(countva, PyObject *)) != NULL)
-		++n;
-	result = PyTuple_New(n);
-	if (result != NULL && n > 0) {
-		for (i = 0; i < n; ++i) {
-			tmp = (PyObject *)va_arg(va, PyObject *);
-			PyTuple_SET_ITEM(result, i, tmp);
-			Py_INCREF(tmp);
-		}
-	}
-	return result;
+    while (((PyObject *)va_arg(countva, PyObject *)) != NULL)
+        ++n;
+    result = PyTuple_New(n);
+    if (result != NULL && n > 0) {
+        for (i = 0; i < n; ++i) {
+            tmp = (PyObject *)va_arg(va, PyObject *);
+            PyTuple_SET_ITEM(result, i, tmp);
+            Py_INCREF(tmp);
+        }
+    }
+    return result;
 }
 
 PyObject *
 PyObject_CallMethodObjArgs(PyObject *callable, PyObject *name, ...)
 {
-	PyObject *args, *tmp;
-	va_list vargs;
+    PyObject *args, *tmp;
+    va_list vargs;
 
-	if (callable == NULL || name == NULL)
-		return null_error();
+    if (callable == NULL || name == NULL)
+        return null_error();
 
-	callable = PyObject_GetAttr(callable, name);
-	if (callable == NULL)
-		return NULL;
+    callable = PyObject_GetAttr(callable, name);
+    if (callable == NULL)
+        return NULL;
 
-	/* count the args */
-	va_start(vargs, name);
-	args = objargs_mktuple(vargs);
-	va_end(vargs);
-	if (args == NULL) {
-		Py_DECREF(callable);
-		return NULL;
-	}
-	tmp = PyObject_Call(callable, args, NULL);
-	Py_DECREF(args);
-	Py_DECREF(callable);
+    /* count the args */
+    va_start(vargs, name);
+    args = objargs_mktuple(vargs);
+    va_end(vargs);
+    if (args == NULL) {
+        Py_DECREF(callable);
+        return NULL;
+    }
+    tmp = PyObject_Call(callable, args, NULL);
+    Py_DECREF(args);
+    Py_DECREF(callable);
 
-	return tmp;
+    return tmp;
 }
 
 PyObject *
 PyObject_CallFunctionObjArgs(PyObject *callable, ...)
 {
-	PyObject *args, *tmp;
-	va_list vargs;
+    PyObject *args, *tmp;
+    va_list vargs;
 
-	if (callable == NULL)
-		return null_error();
+    if (callable == NULL)
+        return null_error();
 
-	/* count the args */
-	va_start(vargs, callable);
-	args = objargs_mktuple(vargs);
-	va_end(vargs);
-	if (args == NULL)
-		return NULL;
-	tmp = PyObject_Call(callable, args, NULL);
-	Py_DECREF(args);
+    /* count the args */
+    va_start(vargs, callable);
+    args = objargs_mktuple(vargs);
+    va_end(vargs);
+    if (args == NULL)
+        return NULL;
+    tmp = PyObject_Call(callable, args, NULL);
+    Py_DECREF(args);
 
-	return tmp;
+    return tmp;
 }
 
 
@@ -2415,7 +2415,7 @@ PyObject_CallFunctionObjArgs(PyObject *callable, ...)
  * produce exactly the same results: NULL is returned and no error is set.
  *
  * If some exception other than AttributeError is raised, then NULL is also
- * returned, but the exception is not cleared.	That's because we want the
+ * returned, but the exception is not cleared.  That's because we want the
  * exception to be propagated along.
  *
  * Callers are expected to test for PyErr_Occurred() when the return value
@@ -2426,282 +2426,282 @@ PyObject_CallFunctionObjArgs(PyObject *callable, ...)
 static PyObject *
 abstract_get_bases(PyObject *cls)
 {
-	static PyObject *__bases__ = NULL;
-	PyObject *bases;
-
-	if (__bases__ == NULL) {
-		__bases__ = PyUnicode_InternFromString("__bases__");
-		if (__bases__ == NULL)
-			return NULL;
-	}
-	Py_ALLOW_RECURSION
-	bases = PyObject_GetAttr(cls, __bases__);
-	Py_END_ALLOW_RECURSION
-	if (bases == NULL) {
-		if (PyErr_ExceptionMatches(PyExc_AttributeError))
-			PyErr_Clear();
-		return NULL;
-	}
-	if (!PyTuple_Check(bases)) {
-		Py_DECREF(bases);
-		return NULL;
-	}
-	return bases;
+    static PyObject *__bases__ = NULL;
+    PyObject *bases;
+
+    if (__bases__ == NULL) {
+        __bases__ = PyUnicode_InternFromString("__bases__");
+        if (__bases__ == NULL)
+            return NULL;
+    }
+    Py_ALLOW_RECURSION
+    bases = PyObject_GetAttr(cls, __bases__);
+    Py_END_ALLOW_RECURSION
+    if (bases == NULL) {
+        if (PyErr_ExceptionMatches(PyExc_AttributeError))
+            PyErr_Clear();
+        return NULL;
+    }
+    if (!PyTuple_Check(bases)) {
+        Py_DECREF(bases);
+        return NULL;
+    }
+    return bases;
 }
 
 
 static int
 abstract_issubclass(PyObject *derived, PyObject *cls)
 {
-	PyObject *bases = NULL;
-	Py_ssize_t i, n;
-	int r = 0;
-
-	while (1) {
-		if (derived == cls)
-			return 1;
-		bases = abstract_get_bases(derived);
-		if (bases == NULL) {
-			if (PyErr_Occurred())
-				return -1;
-			return 0;
-		}
-		n = PyTuple_GET_SIZE(bases);
-		if (n == 0) {
-			Py_DECREF(bases);
-			return 0;
-		}
-		/* Avoid recursivity in the single inheritance case */
-		if (n == 1) {
-			derived = PyTuple_GET_ITEM(bases, 0);
-			Py_DECREF(bases);
-			continue;
-		}
-		for (i = 0; i < n; i++) {
-			r = abstract_issubclass(PyTuple_GET_ITEM(bases, i), cls);
-			if (r != 0)
-				break;
-		}
-		Py_DECREF(bases);
-		return r;
-	}
+    PyObject *bases = NULL;
+    Py_ssize_t i, n;
+    int r = 0;
+
+    while (1) {
+        if (derived == cls)
+            return 1;
+        bases = abstract_get_bases(derived);
+        if (bases == NULL) {
+            if (PyErr_Occurred())
+                return -1;
+            return 0;
+        }
+        n = PyTuple_GET_SIZE(bases);
+        if (n == 0) {
+            Py_DECREF(bases);
+            return 0;
+        }
+        /* Avoid recursivity in the single inheritance case */
+        if (n == 1) {
+            derived = PyTuple_GET_ITEM(bases, 0);
+            Py_DECREF(bases);
+            continue;
+        }
+        for (i = 0; i < n; i++) {
+            r = abstract_issubclass(PyTuple_GET_ITEM(bases, i), cls);
+            if (r != 0)
+                break;
+        }
+        Py_DECREF(bases);
+        return r;
+    }
 }
 
 static int
 check_class(PyObject *cls, const char *error)
 {
-	PyObject *bases = abstract_get_bases(cls);
-	if (bases == NULL) {
-		/* Do not mask errors. */
-		if (!PyErr_Occurred())
-			PyErr_SetString(PyExc_TypeError, error);
-		return 0;
-	}
-	Py_DECREF(bases);
-	return -1;
+    PyObject *bases = abstract_get_bases(cls);
+    if (bases == NULL) {
+        /* Do not mask errors. */
+        if (!PyErr_Occurred())
+            PyErr_SetString(PyExc_TypeError, error);
+        return 0;
+    }
+    Py_DECREF(bases);
+    return -1;
 }
 
 static int
 recursive_isinstance(PyObject *inst, PyObject *cls)
 {
-	PyObject *icls;
-	static PyObject *__class__ = NULL;
-	int retval = 0;
-
-	if (__class__ == NULL) {
-		__class__ = PyUnicode_InternFromString("__class__");
-		if (__class__ == NULL)
-			return -1;
-	}
-
-	if (PyType_Check(cls)) {
-		retval = PyObject_TypeCheck(inst, (PyTypeObject *)cls);
-		if (retval == 0) {
-			PyObject *c = PyObject_GetAttr(inst, __class__);
-			if (c == NULL) {
-				PyErr_Clear();
-			}
-			else {
-				if (c != (PyObject *)(inst->ob_type) &&
-				    PyType_Check(c))
-					retval = PyType_IsSubtype(
-						(PyTypeObject *)c,
-						(PyTypeObject *)cls);
-				Py_DECREF(c);
-			}
-		}
-	}
-	else {
-		if (!check_class(cls,
-			"isinstance() arg 2 must be a class, type,"
-			" or tuple of classes and types"))
-			return -1;
-		icls = PyObject_GetAttr(inst, __class__);
-		if (icls == NULL) {
-			PyErr_Clear();
-			retval = 0;
-		}
-		else {
-			retval = abstract_issubclass(icls, cls);
-			Py_DECREF(icls);
-		}
-	}
-
-	return retval;
+    PyObject *icls;
+    static PyObject *__class__ = NULL;
+    int retval = 0;
+
+    if (__class__ == NULL) {
+        __class__ = PyUnicode_InternFromString("__class__");
+        if (__class__ == NULL)
+            return -1;
+    }
+
+    if (PyType_Check(cls)) {
+        retval = PyObject_TypeCheck(inst, (PyTypeObject *)cls);
+        if (retval == 0) {
+            PyObject *c = PyObject_GetAttr(inst, __class__);
+            if (c == NULL) {
+                PyErr_Clear();
+            }
+            else {
+                if (c != (PyObject *)(inst->ob_type) &&
+                    PyType_Check(c))
+                    retval = PyType_IsSubtype(
+                        (PyTypeObject *)c,
+                        (PyTypeObject *)cls);
+                Py_DECREF(c);
+            }
+        }
+    }
+    else {
+        if (!check_class(cls,
+            "isinstance() arg 2 must be a class, type,"
+            " or tuple of classes and types"))
+            return -1;
+        icls = PyObject_GetAttr(inst, __class__);
+        if (icls == NULL) {
+            PyErr_Clear();
+            retval = 0;
+        }
+        else {
+            retval = abstract_issubclass(icls, cls);
+            Py_DECREF(icls);
+        }
+    }
+
+    return retval;
 }
 
 int
 PyObject_IsInstance(PyObject *inst, PyObject *cls)
 {
-	static PyObject *name = NULL;
-	PyObject *checker;
-
-	/* Quick test for an exact match */
-	if (Py_TYPE(inst) == (PyTypeObject *)cls)
-		return 1;
-
-	if (PyTuple_Check(cls)) {
-		Py_ssize_t i;
-		Py_ssize_t n;
-		int r = 0;
-
-		if (Py_EnterRecursiveCall(" in __instancecheck__"))
-			return -1;
-		n = PyTuple_GET_SIZE(cls);
-		for (i = 0; i < n; ++i) {
-			PyObject *item = PyTuple_GET_ITEM(cls, i);
-			r = PyObject_IsInstance(inst, item);
-			if (r != 0)
-				/* either found it, or got an error */
-				break;
-		}
-		Py_LeaveRecursiveCall();
-		return r;
-	}
-
-	checker = _PyObject_LookupSpecial(cls, "__instancecheck__", &name);
-	if (checker != NULL) {
-		PyObject *res;
-		int ok = -1;
-		if (Py_EnterRecursiveCall(" in __instancecheck__")) {
-			Py_DECREF(checker);
-			return ok;
-		}
-		res = PyObject_CallFunctionObjArgs(checker, inst, NULL);
-		Py_LeaveRecursiveCall();
-		Py_DECREF(checker);
-		if (res != NULL) {
-			ok = PyObject_IsTrue(res);
-			Py_DECREF(res);
-		}
-		return ok;
-	}
-	else if (PyErr_Occurred())
-		return -1;
-	return recursive_isinstance(inst, cls);
-}
-
-static	int
+    static PyObject *name = NULL;
+    PyObject *checker;
+
+    /* Quick test for an exact match */
+    if (Py_TYPE(inst) == (PyTypeObject *)cls)
+        return 1;
+
+    if (PyTuple_Check(cls)) {
+        Py_ssize_t i;
+        Py_ssize_t n;
+        int r = 0;
+
+        if (Py_EnterRecursiveCall(" in __instancecheck__"))
+            return -1;
+        n = PyTuple_GET_SIZE(cls);
+        for (i = 0; i < n; ++i) {
+            PyObject *item = PyTuple_GET_ITEM(cls, i);
+            r = PyObject_IsInstance(inst, item);
+            if (r != 0)
+                /* either found it, or got an error */
+                break;
+        }
+        Py_LeaveRecursiveCall();
+        return r;
+    }
+
+    checker = _PyObject_LookupSpecial(cls, "__instancecheck__", &name);
+    if (checker != NULL) {
+        PyObject *res;
+        int ok = -1;
+        if (Py_EnterRecursiveCall(" in __instancecheck__")) {
+            Py_DECREF(checker);
+            return ok;
+        }
+        res = PyObject_CallFunctionObjArgs(checker, inst, NULL);
+        Py_LeaveRecursiveCall();
+        Py_DECREF(checker);
+        if (res != NULL) {
+            ok = PyObject_IsTrue(res);
+            Py_DECREF(res);
+        }
+        return ok;
+    }
+    else if (PyErr_Occurred())
+        return -1;
+    return recursive_isinstance(inst, cls);
+}
+
+static  int
 recursive_issubclass(PyObject *derived, PyObject *cls)
 {
-	if (PyType_Check(cls) && PyType_Check(derived)) {
-		/* Fast path (non-recursive) */
-		return PyType_IsSubtype((PyTypeObject *)derived, (PyTypeObject *)cls);
-	}
-	if (!check_class(derived,
-			 "issubclass() arg 1 must be a class"))
-		return -1;
-	if (!check_class(cls,
-			"issubclass() arg 2 must be a class"
-			" or tuple of classes"))
-		return -1;
+    if (PyType_Check(cls) && PyType_Check(derived)) {
+        /* Fast path (non-recursive) */
+        return PyType_IsSubtype((PyTypeObject *)derived, (PyTypeObject *)cls);
+    }
+    if (!check_class(derived,
+                     "issubclass() arg 1 must be a class"))
+        return -1;
+    if (!check_class(cls,
+                    "issubclass() arg 2 must be a class"
+                    " or tuple of classes"))
+        return -1;
 
-	return abstract_issubclass(derived, cls);
+    return abstract_issubclass(derived, cls);
 }
 
 int
 PyObject_IsSubclass(PyObject *derived, PyObject *cls)
 {
-	static PyObject *name = NULL;
-	PyObject *checker;
-
-	if (PyTuple_Check(cls)) {
-		Py_ssize_t i;
-		Py_ssize_t n;
-		int r = 0;
-
-		if (Py_EnterRecursiveCall(" in __subclasscheck__"))
-			return -1;
-		n = PyTuple_GET_SIZE(cls);
-		for (i = 0; i < n; ++i) {
-			PyObject *item = PyTuple_GET_ITEM(cls, i);
-			r = PyObject_IsSubclass(derived, item);
-			if (r != 0)
-				/* either found it, or got an error */
-				break;
-		}
-		Py_LeaveRecursiveCall();
-		return r;
-	}
-
-	checker = _PyObject_LookupSpecial(cls, "__subclasscheck__", &name);
-	if (checker != NULL) {
-		PyObject *res;
-		int ok = -1;
-		if (Py_EnterRecursiveCall(" in __subclasscheck__")) {
-			Py_DECREF(checker);
-			return ok;
-		}
-		res = PyObject_CallFunctionObjArgs(checker, derived, NULL);
-		Py_LeaveRecursiveCall();
-		Py_DECREF(checker);
-		if (res != NULL) {
-			ok = PyObject_IsTrue(res);
-			Py_DECREF(res);
-		}
-		return ok;
-	}
-	else if (PyErr_Occurred())
-		return -1;
-	return recursive_issubclass(derived, cls);
+    static PyObject *name = NULL;
+    PyObject *checker;
+
+    if (PyTuple_Check(cls)) {
+        Py_ssize_t i;
+        Py_ssize_t n;
+        int r = 0;
+
+        if (Py_EnterRecursiveCall(" in __subclasscheck__"))
+            return -1;
+        n = PyTuple_GET_SIZE(cls);
+        for (i = 0; i < n; ++i) {
+            PyObject *item = PyTuple_GET_ITEM(cls, i);
+            r = PyObject_IsSubclass(derived, item);
+            if (r != 0)
+                /* either found it, or got an error */
+                break;
+        }
+        Py_LeaveRecursiveCall();
+        return r;
+    }
+
+    checker = _PyObject_LookupSpecial(cls, "__subclasscheck__", &name);
+    if (checker != NULL) {
+        PyObject *res;
+        int ok = -1;
+        if (Py_EnterRecursiveCall(" in __subclasscheck__")) {
+            Py_DECREF(checker);
+            return ok;
+        }
+        res = PyObject_CallFunctionObjArgs(checker, derived, NULL);
+        Py_LeaveRecursiveCall();
+        Py_DECREF(checker);
+        if (res != NULL) {
+            ok = PyObject_IsTrue(res);
+            Py_DECREF(res);
+        }
+        return ok;
+    }
+    else if (PyErr_Occurred())
+        return -1;
+    return recursive_issubclass(derived, cls);
 }
 
 int
 _PyObject_RealIsInstance(PyObject *inst, PyObject *cls)
 {
-	return recursive_isinstance(inst, cls);
+    return recursive_isinstance(inst, cls);
 }
 
 int
 _PyObject_RealIsSubclass(PyObject *derived, PyObject *cls)
 {
-	return recursive_issubclass(derived, cls);
+    return recursive_issubclass(derived, cls);
 }
 
 
 PyObject *
 PyObject_GetIter(PyObject *o)
 {
-	PyTypeObject *t = o->ob_type;
-	getiterfunc f = NULL;
-	f = t->tp_iter;
-	if (f == NULL) {
-		if (PySequence_Check(o))
-			return PySeqIter_New(o);
-		return type_error("'%.200s' object is not iterable", o);
-	}
-	else {
-		PyObject *res = (*f)(o);
-		if (res != NULL && !PyIter_Check(res)) {
-			PyErr_Format(PyExc_TypeError,
-				     "iter() returned non-iterator "
-				     "of type '%.100s'",
-				     res->ob_type->tp_name);
-			Py_DECREF(res);
-			res = NULL;
-		}
-		return res;
-	}
+    PyTypeObject *t = o->ob_type;
+    getiterfunc f = NULL;
+    f = t->tp_iter;
+    if (f == NULL) {
+        if (PySequence_Check(o))
+            return PySeqIter_New(o);
+        return type_error("'%.200s' object is not iterable", o);
+    }
+    else {
+        PyObject *res = (*f)(o);
+        if (res != NULL && !PyIter_Check(res)) {
+            PyErr_Format(PyExc_TypeError,
+                         "iter() returned non-iterator "
+                         "of type '%.100s'",
+                         res->ob_type->tp_name);
+            Py_DECREF(res);
+            res = NULL;
+        }
+        return res;
+    }
 }
 
 /* Return next item.
@@ -2709,18 +2709,18 @@ PyObject_GetIter(PyObject *o)
  * If the iteration terminates normally, return NULL and clear the
  * PyExc_StopIteration exception (if it was set).  PyErr_Occurred()
  * will be false.
- * Else return the next object.	 PyErr_Occurred() will be false.
+ * Else return the next object.  PyErr_Occurred() will be false.
  */
 PyObject *
 PyIter_Next(PyObject *iter)
 {
-	PyObject *result;
-	result = (*iter->ob_type->tp_iternext)(iter);
-	if (result == NULL &&
-	    PyErr_Occurred() &&
-	    PyErr_ExceptionMatches(PyExc_StopIteration))
-		PyErr_Clear();
-	return result;
+    PyObject *result;
+    result = (*iter->ob_type->tp_iternext)(iter);
+    if (result == NULL &&
+        PyErr_Occurred() &&
+        PyErr_ExceptionMatches(PyExc_StopIteration))
+        PyErr_Clear();
+    return result;
 }
 
 
@@ -2735,43 +2735,43 @@ PyIter_Next(PyObject *iter)
 char *const *
 _PySequence_BytesToCharpArray(PyObject* self)
 {
-	char **array;
-	Py_ssize_t i, argc;
-	PyObject *item = NULL;
-
-	argc = PySequence_Size(self);
-	if (argc == -1)
-		return NULL;
-
-	array = malloc((argc + 1) * sizeof(char *));
-	if (array == NULL) {
-		PyErr_NoMemory();
-		return NULL;
-	}
-	for (i = 0; i < argc; ++i) {
-		char *data;
-		item = PySequence_GetItem(self, i);
-		data = PyBytes_AsString(item);
-		if (data == NULL) {
-			/* NULL terminate before freeing. */
-			array[i] = NULL;
-			goto fail;
-		}
-		array[i] = strdup(data);
-		if (!array[i]) {
-			PyErr_NoMemory();
-			goto fail;
-		}
-		Py_DECREF(item);
-	}
-	array[argc] = NULL;
-
-	return array;
+    char **array;
+    Py_ssize_t i, argc;
+    PyObject *item = NULL;
+
+    argc = PySequence_Size(self);
+    if (argc == -1)
+        return NULL;
+
+    array = malloc((argc + 1) * sizeof(char *));
+    if (array == NULL) {
+        PyErr_NoMemory();
+        return NULL;
+    }
+    for (i = 0; i < argc; ++i) {
+        char *data;
+        item = PySequence_GetItem(self, i);
+        data = PyBytes_AsString(item);
+        if (data == NULL) {
+            /* NULL terminate before freeing. */
+            array[i] = NULL;
+            goto fail;
+        }
+        array[i] = strdup(data);
+        if (!array[i]) {
+            PyErr_NoMemory();
+            goto fail;
+        }
+        Py_DECREF(item);
+    }
+    array[argc] = NULL;
+
+    return array;
 
 fail:
-	Py_XDECREF(item);
-	_Py_FreeCharPArray(array);
-	return NULL;
+    Py_XDECREF(item);
+    _Py_FreeCharPArray(array);
+    return NULL;
 }
 
 
@@ -2779,9 +2779,9 @@ fail:
 void
 _Py_FreeCharPArray(char *const array[])
 {
-	Py_ssize_t i;
-	for (i = 0; array[i] != NULL; ++i) {
-		free(array[i]);
-	}
-	free((void*)array);
+    Py_ssize_t i;
+    for (i = 0; array[i] != NULL; ++i) {
+        free(array[i]);
+    }
+    free((void*)array);
 }