mirror of
https://github.com/python/cpython.git
synced 2024-12-06 08:15:13 +08:00
262 lines
7.4 KiB
C
262 lines
7.4 KiB
C
// namespace object implementation
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#include "Python.h"
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#include "structmember.h" // PyMemberDef
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typedef struct {
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PyObject_HEAD
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PyObject *ns_dict;
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} _PyNamespaceObject;
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static PyMemberDef namespace_members[] = {
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{"__dict__", T_OBJECT, offsetof(_PyNamespaceObject, ns_dict), READONLY},
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{NULL}
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};
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// Methods
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static PyObject *
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namespace_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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{
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PyObject *self;
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assert(type != NULL && type->tp_alloc != NULL);
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self = type->tp_alloc(type, 0);
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if (self != NULL) {
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_PyNamespaceObject *ns = (_PyNamespaceObject *)self;
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ns->ns_dict = PyDict_New();
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if (ns->ns_dict == NULL) {
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Py_DECREF(ns);
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return NULL;
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}
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}
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return self;
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}
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static int
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namespace_init(_PyNamespaceObject *ns, PyObject *args, PyObject *kwds)
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{
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if (PyTuple_GET_SIZE(args) != 0) {
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PyErr_Format(PyExc_TypeError, "no positional arguments expected");
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return -1;
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}
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if (kwds == NULL) {
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return 0;
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}
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if (!PyArg_ValidateKeywordArguments(kwds)) {
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return -1;
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}
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return PyDict_Update(ns->ns_dict, kwds);
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}
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static void
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namespace_dealloc(_PyNamespaceObject *ns)
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{
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PyObject_GC_UnTrack(ns);
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Py_CLEAR(ns->ns_dict);
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Py_TYPE(ns)->tp_free((PyObject *)ns);
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}
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static PyObject *
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namespace_repr(PyObject *ns)
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{
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int i, loop_error = 0;
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PyObject *pairs = NULL, *d = NULL, *keys = NULL, *keys_iter = NULL;
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PyObject *key;
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PyObject *separator, *pairsrepr, *repr = NULL;
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const char * name;
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name = Py_IS_TYPE(ns, &_PyNamespace_Type) ? "namespace"
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: Py_TYPE(ns)->tp_name;
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i = Py_ReprEnter(ns);
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if (i != 0) {
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return i > 0 ? PyUnicode_FromFormat("%s(...)", name) : NULL;
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}
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pairs = PyList_New(0);
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if (pairs == NULL)
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goto error;
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d = ((_PyNamespaceObject *)ns)->ns_dict;
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assert(d != NULL);
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Py_INCREF(d);
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keys = PyDict_Keys(d);
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if (keys == NULL)
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goto error;
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keys_iter = PyObject_GetIter(keys);
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if (keys_iter == NULL)
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goto error;
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while ((key = PyIter_Next(keys_iter)) != NULL) {
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if (PyUnicode_Check(key) && PyUnicode_GET_LENGTH(key) > 0) {
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PyObject *value, *item;
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value = PyDict_GetItemWithError(d, key);
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if (value != NULL) {
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item = PyUnicode_FromFormat("%U=%R", key, value);
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if (item == NULL) {
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loop_error = 1;
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}
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else {
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loop_error = PyList_Append(pairs, item);
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Py_DECREF(item);
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}
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}
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else if (PyErr_Occurred()) {
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loop_error = 1;
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}
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}
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Py_DECREF(key);
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if (loop_error)
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goto error;
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}
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separator = PyUnicode_FromString(", ");
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if (separator == NULL)
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goto error;
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pairsrepr = PyUnicode_Join(separator, pairs);
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Py_DECREF(separator);
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if (pairsrepr == NULL)
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goto error;
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repr = PyUnicode_FromFormat("%s(%S)", name, pairsrepr);
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Py_DECREF(pairsrepr);
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error:
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Py_XDECREF(pairs);
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Py_XDECREF(d);
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Py_XDECREF(keys);
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Py_XDECREF(keys_iter);
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Py_ReprLeave(ns);
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return repr;
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}
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static int
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namespace_traverse(_PyNamespaceObject *ns, visitproc visit, void *arg)
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{
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Py_VISIT(ns->ns_dict);
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return 0;
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}
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static int
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namespace_clear(_PyNamespaceObject *ns)
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{
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Py_CLEAR(ns->ns_dict);
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return 0;
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}
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static PyObject *
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namespace_richcompare(PyObject *self, PyObject *other, int op)
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{
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if (PyObject_TypeCheck(self, &_PyNamespace_Type) &&
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PyObject_TypeCheck(other, &_PyNamespace_Type))
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return PyObject_RichCompare(((_PyNamespaceObject *)self)->ns_dict,
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((_PyNamespaceObject *)other)->ns_dict, op);
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Py_RETURN_NOTIMPLEMENTED;
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}
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PyDoc_STRVAR(namespace_reduce__doc__, "Return state information for pickling");
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static PyObject *
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namespace_reduce(_PyNamespaceObject *ns, PyObject *Py_UNUSED(ignored))
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{
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PyObject *result, *args = PyTuple_New(0);
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if (!args)
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return NULL;
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result = PyTuple_Pack(3, (PyObject *)Py_TYPE(ns), args, ns->ns_dict);
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Py_DECREF(args);
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return result;
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}
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static PyMethodDef namespace_methods[] = {
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{"__reduce__", (PyCFunction)namespace_reduce, METH_NOARGS,
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namespace_reduce__doc__},
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{NULL, NULL} // sentinel
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};
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PyDoc_STRVAR(namespace_doc,
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"A simple attribute-based namespace.\n\
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\n\
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SimpleNamespace(**kwargs)");
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PyTypeObject _PyNamespace_Type = {
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PyVarObject_HEAD_INIT(&PyType_Type, 0)
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"types.SimpleNamespace", /* tp_name */
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sizeof(_PyNamespaceObject), /* tp_basicsize */
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0, /* tp_itemsize */
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(destructor)namespace_dealloc, /* tp_dealloc */
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0, /* tp_vectorcall_offset */
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0, /* tp_getattr */
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0, /* tp_setattr */
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0, /* tp_as_async */
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(reprfunc)namespace_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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PyObject_GenericSetAttr, /* tp_setattro */
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0, /* tp_as_buffer */
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Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
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Py_TPFLAGS_BASETYPE, /* tp_flags */
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namespace_doc, /* tp_doc */
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(traverseproc)namespace_traverse, /* tp_traverse */
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(inquiry)namespace_clear, /* tp_clear */
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namespace_richcompare, /* 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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namespace_methods, /* tp_methods */
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namespace_members, /* tp_members */
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0, /* tp_getset */
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0, /* tp_base */
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0, /* tp_dict */
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0, /* tp_descr_get */
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0, /* tp_descr_set */
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offsetof(_PyNamespaceObject, ns_dict), /* tp_dictoffset */
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(initproc)namespace_init, /* tp_init */
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PyType_GenericAlloc, /* tp_alloc */
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(newfunc)namespace_new, /* tp_new */
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PyObject_GC_Del, /* tp_free */
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};
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PyObject *
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_PyNamespace_New(PyObject *kwds)
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{
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PyObject *ns = namespace_new(&_PyNamespace_Type, NULL, NULL);
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if (ns == NULL)
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return NULL;
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if (kwds == NULL)
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return ns;
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if (PyDict_Update(((_PyNamespaceObject *)ns)->ns_dict, kwds) != 0) {
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Py_DECREF(ns);
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return NULL;
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}
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return (PyObject *)ns;
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}
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