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Viewing changes to Objects/cellobject.c

  • Committer: Bazaar Package Importer
  • Author(s): Matthias Klose
  • Date: 2009-02-13 12:51:00 UTC
  • Revision ID: james.westby@ubuntu.com-20090213125100-uufgcb9yeqzujpqw
Tags: upstream-2.6.1
Import upstream version 2.6.1

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