AppPkg/Applications/Python/Python-2.7.10: Initial Checkin part 3/5.

[mirror_edk2.git] / AppPkg / Applications / Python / Python-2.7.10 / Objects / cellobject.c

/* Cell object implementation */\r
\r
#include "Python.h"\r
\r
PyObject *\r
PyCell_New(PyObject *obj)\r
{\r
    PyCellObject *op;\r
\r
    op = (PyCellObject *)PyObject_GC_New(PyCellObject, &PyCell_Type);\r
    if (op == NULL)\r
        return NULL;\r
    op->ob_ref = obj;\r
    Py_XINCREF(obj);\r
\r
    _PyObject_GC_TRACK(op);\r
    return (PyObject *)op;\r
}\r
\r
PyObject *\r
PyCell_Get(PyObject *op)\r
{\r
    if (!PyCell_Check(op)) {\r
        PyErr_BadInternalCall();\r
        return NULL;\r
    }\r
    Py_XINCREF(((PyCellObject*)op)->ob_ref);\r
    return PyCell_GET(op);\r
}\r
\r
int\r
PyCell_Set(PyObject *op, PyObject *obj)\r
{\r
    PyObject* oldobj;\r
    if (!PyCell_Check(op)) {\r
        PyErr_BadInternalCall();\r
        return -1;\r
    }\r
    oldobj = PyCell_GET(op);\r
    Py_XINCREF(obj);\r
    PyCell_SET(op, obj);\r
    Py_XDECREF(oldobj);\r
    return 0;\r
}\r
\r
static void\r
cell_dealloc(PyCellObject *op)\r
{\r
    _PyObject_GC_UNTRACK(op);\r
    Py_XDECREF(op->ob_ref);\r
    PyObject_GC_Del(op);\r
}\r
\r
static int\r
cell_compare(PyCellObject *a, PyCellObject *b)\r
{\r
    /* Py3K warning for comparisons  */\r
    if (PyErr_WarnPy3k("cell comparisons not supported in 3.x",\r
                       1) < 0) {\r
        return -2;\r
    }\r
\r
    if (a->ob_ref == NULL) {\r
        if (b->ob_ref == NULL)\r
            return 0;\r
        return -1;\r
    } else if (b->ob_ref == NULL)\r
        return 1;\r
    return PyObject_Compare(a->ob_ref, b->ob_ref);\r
}\r
\r
static PyObject *\r
cell_repr(PyCellObject *op)\r
{\r
    if (op->ob_ref == NULL)\r
        return PyString_FromFormat("<cell at %p: empty>", op);\r
\r
    return PyString_FromFormat("<cell at %p: %.80s object at %p>",\r
                               op, op->ob_ref->ob_type->tp_name,\r
                               op->ob_ref);\r
}\r
\r
static int\r
cell_traverse(PyCellObject *op, visitproc visit, void *arg)\r
{\r
    Py_VISIT(op->ob_ref);\r
    return 0;\r
}\r
\r
static int\r
cell_clear(PyCellObject *op)\r
{\r
    Py_CLEAR(op->ob_ref);\r
    return 0;\r
}\r
\r
static PyObject *\r
cell_get_contents(PyCellObject *op, void *closure)\r
{\r
    if (op->ob_ref == NULL)\r
    {\r
        PyErr_SetString(PyExc_ValueError, "Cell is empty");\r
        return NULL;\r
    }\r
    Py_INCREF(op->ob_ref);\r
    return op->ob_ref;\r
}\r
\r
static PyGetSetDef cell_getsetlist[] = {\r
    {"cell_contents", (getter)cell_get_contents, NULL},\r
    {NULL} /* sentinel */\r
};\r
\r
PyTypeObject PyCell_Type = {\r
    PyVarObject_HEAD_INIT(&PyType_Type, 0)\r
    "cell",\r
    sizeof(PyCellObject),\r
    0,\r
    (destructor)cell_dealloc,               /* tp_dealloc */\r
    0,                                      /* tp_print */\r
    0,                                          /* tp_getattr */\r
    0,                                          /* tp_setattr */\r
    (cmpfunc)cell_compare,                      /* tp_compare */\r
    (reprfunc)cell_repr,                        /* tp_repr */\r
    0,                                          /* tp_as_number */\r
    0,                                          /* tp_as_sequence */\r
    0,                                          /* tp_as_mapping */\r
    0,                                          /* tp_hash */\r
    0,                                          /* tp_call */\r
    0,                                          /* tp_str */\r
    PyObject_GenericGetAttr,                    /* tp_getattro */\r
    0,                                          /* tp_setattro */\r
    0,                                          /* tp_as_buffer */\r
    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */\r
    0,                                          /* tp_doc */\r
    (traverseproc)cell_traverse,                /* tp_traverse */\r
    (inquiry)cell_clear,                        /* tp_clear */\r
    0,                                          /* tp_richcompare */\r
    0,                                          /* tp_weaklistoffset */\r
    0,                                          /* tp_iter */\r
    0,                                          /* tp_iternext */\r
    0,                                          /* tp_methods */\r
    0,                                          /* tp_members */\r
    cell_getsetlist,                            /* tp_getset */\r
};\r