bpo-16865: Support arrays >=2GB in ctypes. (GH-3006)

1 files changed, 8 insertions, 8 deletions

diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c
index 5bf49ac..3ae6348 100644
--- a/Modules/_ctypes/_ctypes.c
+++ b/Modules/_ctypes/_ctypes.c
@@ -1390,8 +1390,7 @@ PyCArrayType_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
     StgDictObject *stgdict;
     StgDictObject *itemdict;
     PyObject *length_attr, *type_attr;
-    long length;
-    int overflow;
+    Py_ssize_t length;
     Py_ssize_t itemsize, itemalign;
 
     /* create the new instance (which is a class,
@@ -1413,14 +1412,15 @@ PyCArrayType_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
         Py_XDECREF(length_attr);
         goto error;
     }
-    length = PyLong_AsLongAndOverflow(length_attr, &overflow);
-    if (overflow) {
-        PyErr_SetString(PyExc_OverflowError,
-                        "The '_length_' attribute is too large");
-        Py_DECREF(length_attr);
+    length = PyLong_AsSsize_t(length_attr);
+    Py_DECREF(length_attr);
+    if (length == -1 && PyErr_Occurred()) {
+        if (PyErr_ExceptionMatches(PyExc_OverflowError)) {
+            PyErr_SetString(PyExc_OverflowError,
+                            "The '_length_' attribute is too large");
+        }
         goto error;
     }
-    Py_DECREF(length_attr);
 
     type_attr = PyObject_GetAttrString((PyObject *)result, "_type_");
     if (!type_attr) {