Viewing file:  xxlimited_35.c (6.71 KB) -rw-r--r--
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/* This module is compiled using limited API from Python 3.5,
* making sure that it works as expected.
*
* See the xxlimited module for an extension module template.
*/
#define Py_LIMITED_API 0x03050000
#include "Python.h"
/* Xxo objects */
static PyObject *ErrorObject;
typedef struct {
PyObject_HEAD
PyObject *x_attr; /* Attributes dictionary */
} XxoObject;
static PyObject *Xxo_Type;
#define XxoObject_Check(v) Py_IS_TYPE(v, Xxo_Type)
static XxoObject *
newXxoObject(PyObject *arg)
{
XxoObject *self;
self = PyObject_GC_New(XxoObject, (PyTypeObject*)Xxo_Type);
if (self == NULL)
return NULL;
self->x_attr = NULL;
return self;
}
/* Xxo methods */
static int
Xxo_traverse(XxoObject *self, visitproc visit, void *arg)
{
Py_VISIT(Py_TYPE(self));
Py_VISIT(self->x_attr);
return 0;
}
static int
Xxo_clear(XxoObject *self)
{
Py_CLEAR(self->x_attr);
return 0;
}
static void
Xxo_finalize(XxoObject *self)
{
Py_CLEAR(self->x_attr);
}
static PyObject *
Xxo_demo(XxoObject *self, PyObject *args)
{
PyObject *o = NULL;
if (!PyArg_ParseTuple(args, "|O:demo", &o))
return NULL;
/* Test availability of fast type checks */
if (o != NULL && PyUnicode_Check(o)) {
Py_INCREF(o);
return o;
}
Py_INCREF(Py_None);
return Py_None;
}
static PyMethodDef Xxo_methods[] = {
{"demo", (PyCFunction)Xxo_demo, METH_VARARGS,
PyDoc_STR("demo() -> None")},
{NULL, NULL} /* sentinel */
};
static PyObject *
Xxo_getattro(XxoObject *self, PyObject *name)
{
if (self->x_attr != NULL) {
PyObject *v = PyDict_GetItemWithError(self->x_attr, name);
if (v != NULL) {
Py_INCREF(v);
return v;
}
else if (PyErr_Occurred()) {
return NULL;
}
}
return PyObject_GenericGetAttr((PyObject *)self, name);
}
static int
Xxo_setattr(XxoObject *self, const char *name, PyObject *v)
{
if (self->x_attr == NULL) {
self->x_attr = PyDict_New();
if (self->x_attr == NULL)
return -1;
}
if (v == NULL) {
int rv = PyDict_DelItemString(self->x_attr, name);
if (rv < 0 && PyErr_ExceptionMatches(PyExc_KeyError))
PyErr_SetString(PyExc_AttributeError,
"delete non-existing Xxo attribute");
return rv;
}
else
return PyDict_SetItemString(self->x_attr, name, v);
}
static PyType_Slot Xxo_Type_slots[] = {
{Py_tp_doc, "The Xxo type"},
{Py_tp_traverse, Xxo_traverse},
{Py_tp_clear, Xxo_clear},
{Py_tp_finalize, Xxo_finalize},
{Py_tp_getattro, Xxo_getattro},
{Py_tp_setattr, Xxo_setattr},
{Py_tp_methods, Xxo_methods},
{0, 0},
};
static PyType_Spec Xxo_Type_spec = {
"xxlimited.Xxo",
sizeof(XxoObject),
0,
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
Xxo_Type_slots
};
/* --------------------------------------------------------------------- */
/* Function of two integers returning integer */
PyDoc_STRVAR(xx_foo_doc,
"foo(i,j)\n\
\n\
Return the sum of i and j.");
static PyObject *
xx_foo(PyObject *self, PyObject *args)
{
long i, j;
long res;
if (!PyArg_ParseTuple(args, "ll:foo", &i, &j))
return NULL;
res = i+j; /* XXX Do something here */
return PyLong_FromLong(res);
}
/* Function of no arguments returning new Xxo object */
static PyObject *
xx_new(PyObject *self, PyObject *args)
{
XxoObject *rv;
if (!PyArg_ParseTuple(args, ":new"))
return NULL;
rv = newXxoObject(args);
if (rv == NULL)
return NULL;
return (PyObject *)rv;
}
/* Test bad format character */
static PyObject *
xx_roj(PyObject *self, PyObject *args)
{
PyObject *a;
long b;
if (!PyArg_ParseTuple(args, "O#:roj", &a, &b))
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
/* ---------- */
static PyType_Slot Str_Type_slots[] = {
{Py_tp_base, NULL}, /* filled out in module init function */
{0, 0},
};
static PyType_Spec Str_Type_spec = {
"xxlimited.Str",
0,
0,
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
Str_Type_slots
};
/* ---------- */
static PyObject *
null_richcompare(PyObject *self, PyObject *other, int op)
{
Py_RETURN_NOTIMPLEMENTED;
}
static PyType_Slot Null_Type_slots[] = {
{Py_tp_base, NULL}, /* filled out in module init */
{Py_tp_new, NULL},
{Py_tp_richcompare, null_richcompare},
{0, 0}
};
static PyType_Spec Null_Type_spec = {
"xxlimited.Null",
0, /* basicsize */
0, /* itemsize */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
Null_Type_slots
};
/* ---------- */
/* List of functions defined in the module */
static PyMethodDef xx_methods[] = {
{"roj", xx_roj, METH_VARARGS,
PyDoc_STR("roj(a,b) -> None")},
{"foo", xx_foo, METH_VARARGS,
xx_foo_doc},
{"new", xx_new, METH_VARARGS,
PyDoc_STR("new() -> new Xx object")},
{NULL, NULL} /* sentinel */
};
PyDoc_STRVAR(module_doc,
"This is a module for testing limited API from Python 3.5.");
static int
xx_modexec(PyObject *m)
{
PyObject *o;
/* Due to cross platform compiler issues the slots must be filled
* here. It's required for portability to Windows without requiring
* C++. */
Null_Type_slots[0].pfunc = &PyBaseObject_Type;
Null_Type_slots[1].pfunc = PyType_GenericNew;
Str_Type_slots[0].pfunc = &PyUnicode_Type;
Xxo_Type = PyType_FromSpec(&Xxo_Type_spec);
if (Xxo_Type == NULL)
goto fail;
/* Add some symbolic constants to the module */
if (ErrorObject == NULL) {
ErrorObject = PyErr_NewException("xxlimited.error", NULL, NULL);
if (ErrorObject == NULL)
goto fail;
}
Py_INCREF(ErrorObject);
PyModule_AddObject(m, "error", ErrorObject);
/* Add Xxo */
o = PyType_FromSpec(&Xxo_Type_spec);
if (o == NULL)
goto fail;
PyModule_AddObject(m, "Xxo", o);
/* Add Str */
o = PyType_FromSpec(&Str_Type_spec);
if (o == NULL)
goto fail;
PyModule_AddObject(m, "Str", o);
/* Add Null */
o = PyType_FromSpec(&Null_Type_spec);
if (o == NULL)
goto fail;
PyModule_AddObject(m, "Null", o);
return 0;
fail:
Py_XDECREF(m);
return -1;
}
static PyModuleDef_Slot xx_slots[] = {
{Py_mod_exec, xx_modexec},
{0, NULL}
};
static struct PyModuleDef xxmodule = {
PyModuleDef_HEAD_INIT,
"xxlimited_35",
module_doc,
0,
xx_methods,
xx_slots,
NULL,
NULL,
NULL
};
/* Export function for the module (*must* be called PyInit_xx) */
PyMODINIT_FUNC
PyInit_xxlimited_35(void)
{
return PyModuleDef_Init(&xxmodule);
}
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