--- /dev/null
+\r
+/* Function object implementation */\r
+\r
+#include "Python.h"\r
+#include "code.h"\r
+#include "eval.h"\r
+#include "structmember.h"\r
+\r
+PyObject *\r
+PyFunction_New(PyObject *code, PyObject *globals)\r
+{\r
+ PyFunctionObject *op = PyObject_GC_New(PyFunctionObject,\r
+ &PyFunction_Type);\r
+ static PyObject *__name__ = 0;\r
+ if (op != NULL) {\r
+ PyObject *doc;\r
+ PyObject *consts;\r
+ PyObject *module;\r
+ op->func_weakreflist = NULL;\r
+ Py_INCREF(code);\r
+ op->func_code = code;\r
+ Py_INCREF(globals);\r
+ op->func_globals = globals;\r
+ op->func_name = ((PyCodeObject *)code)->co_name;\r
+ Py_INCREF(op->func_name);\r
+ op->func_defaults = NULL; /* No default arguments */\r
+ op->func_closure = NULL;\r
+ consts = ((PyCodeObject *)code)->co_consts;\r
+ if (PyTuple_Size(consts) >= 1) {\r
+ doc = PyTuple_GetItem(consts, 0);\r
+ if (!PyString_Check(doc) && !PyUnicode_Check(doc))\r
+ doc = Py_None;\r
+ }\r
+ else\r
+ doc = Py_None;\r
+ Py_INCREF(doc);\r
+ op->func_doc = doc;\r
+ op->func_dict = NULL;\r
+ op->func_module = NULL;\r
+\r
+ /* __module__: If module name is in globals, use it.\r
+ Otherwise, use None.\r
+ */\r
+ if (!__name__) {\r
+ __name__ = PyString_InternFromString("__name__");\r
+ if (!__name__) {\r
+ Py_DECREF(op);\r
+ return NULL;\r
+ }\r
+ }\r
+ module = PyDict_GetItem(globals, __name__);\r
+ if (module) {\r
+ Py_INCREF(module);\r
+ op->func_module = module;\r
+ }\r
+ }\r
+ else\r
+ return NULL;\r
+ _PyObject_GC_TRACK(op);\r
+ return (PyObject *)op;\r
+}\r
+\r
+PyObject *\r
+PyFunction_GetCode(PyObject *op)\r
+{\r
+ if (!PyFunction_Check(op)) {\r
+ PyErr_BadInternalCall();\r
+ return NULL;\r
+ }\r
+ return ((PyFunctionObject *) op) -> func_code;\r
+}\r
+\r
+PyObject *\r
+PyFunction_GetGlobals(PyObject *op)\r
+{\r
+ if (!PyFunction_Check(op)) {\r
+ PyErr_BadInternalCall();\r
+ return NULL;\r
+ }\r
+ return ((PyFunctionObject *) op) -> func_globals;\r
+}\r
+\r
+PyObject *\r
+PyFunction_GetModule(PyObject *op)\r
+{\r
+ if (!PyFunction_Check(op)) {\r
+ PyErr_BadInternalCall();\r
+ return NULL;\r
+ }\r
+ return ((PyFunctionObject *) op) -> func_module;\r
+}\r
+\r
+PyObject *\r
+PyFunction_GetDefaults(PyObject *op)\r
+{\r
+ if (!PyFunction_Check(op)) {\r
+ PyErr_BadInternalCall();\r
+ return NULL;\r
+ }\r
+ return ((PyFunctionObject *) op) -> func_defaults;\r
+}\r
+\r
+int\r
+PyFunction_SetDefaults(PyObject *op, PyObject *defaults)\r
+{\r
+ if (!PyFunction_Check(op)) {\r
+ PyErr_BadInternalCall();\r
+ return -1;\r
+ }\r
+ if (defaults == Py_None)\r
+ defaults = NULL;\r
+ else if (defaults && PyTuple_Check(defaults)) {\r
+ Py_INCREF(defaults);\r
+ }\r
+ else {\r
+ PyErr_SetString(PyExc_SystemError, "non-tuple default args");\r
+ return -1;\r
+ }\r
+ Py_XDECREF(((PyFunctionObject *) op) -> func_defaults);\r
+ ((PyFunctionObject *) op) -> func_defaults = defaults;\r
+ return 0;\r
+}\r
+\r
+PyObject *\r
+PyFunction_GetClosure(PyObject *op)\r
+{\r
+ if (!PyFunction_Check(op)) {\r
+ PyErr_BadInternalCall();\r
+ return NULL;\r
+ }\r
+ return ((PyFunctionObject *) op) -> func_closure;\r
+}\r
+\r
+int\r
+PyFunction_SetClosure(PyObject *op, PyObject *closure)\r
+{\r
+ if (!PyFunction_Check(op)) {\r
+ PyErr_BadInternalCall();\r
+ return -1;\r
+ }\r
+ if (closure == Py_None)\r
+ closure = NULL;\r
+ else if (PyTuple_Check(closure)) {\r
+ Py_INCREF(closure);\r
+ }\r
+ else {\r
+ PyErr_Format(PyExc_SystemError,\r
+ "expected tuple for closure, got '%.100s'",\r
+ closure->ob_type->tp_name);\r
+ return -1;\r
+ }\r
+ Py_XDECREF(((PyFunctionObject *) op) -> func_closure);\r
+ ((PyFunctionObject *) op) -> func_closure = closure;\r
+ return 0;\r
+}\r
+\r
+/* Methods */\r
+\r
+#define OFF(x) offsetof(PyFunctionObject, x)\r
+\r
+static PyMemberDef func_memberlist[] = {\r
+ {"func_closure", T_OBJECT, OFF(func_closure),\r
+ RESTRICTED|READONLY},\r
+ {"__closure__", T_OBJECT, OFF(func_closure),\r
+ RESTRICTED|READONLY},\r
+ {"func_doc", T_OBJECT, OFF(func_doc), PY_WRITE_RESTRICTED},\r
+ {"__doc__", T_OBJECT, OFF(func_doc), PY_WRITE_RESTRICTED},\r
+ {"func_globals", T_OBJECT, OFF(func_globals),\r
+ RESTRICTED|READONLY},\r
+ {"__globals__", T_OBJECT, OFF(func_globals),\r
+ RESTRICTED|READONLY},\r
+ {"__module__", T_OBJECT, OFF(func_module), PY_WRITE_RESTRICTED},\r
+ {NULL} /* Sentinel */\r
+};\r
+\r
+static int\r
+restricted(void)\r
+{\r
+ if (!PyEval_GetRestricted())\r
+ return 0;\r
+ PyErr_SetString(PyExc_RuntimeError,\r
+ "function attributes not accessible in restricted mode");\r
+ return 1;\r
+}\r
+\r
+static PyObject *\r
+func_get_dict(PyFunctionObject *op)\r
+{\r
+ if (restricted())\r
+ return NULL;\r
+ if (op->func_dict == NULL) {\r
+ op->func_dict = PyDict_New();\r
+ if (op->func_dict == NULL)\r
+ return NULL;\r
+ }\r
+ Py_INCREF(op->func_dict);\r
+ return op->func_dict;\r
+}\r
+\r
+static int\r
+func_set_dict(PyFunctionObject *op, PyObject *value)\r
+{\r
+ PyObject *tmp;\r
+\r
+ if (restricted())\r
+ return -1;\r
+ /* It is illegal to del f.func_dict */\r
+ if (value == NULL) {\r
+ PyErr_SetString(PyExc_TypeError,\r
+ "function's dictionary may not be deleted");\r
+ return -1;\r
+ }\r
+ /* Can only set func_dict to a dictionary */\r
+ if (!PyDict_Check(value)) {\r
+ PyErr_SetString(PyExc_TypeError,\r
+ "setting function's dictionary to a non-dict");\r
+ return -1;\r
+ }\r
+ tmp = op->func_dict;\r
+ Py_INCREF(value);\r
+ op->func_dict = value;\r
+ Py_XDECREF(tmp);\r
+ return 0;\r
+}\r
+\r
+static PyObject *\r
+func_get_code(PyFunctionObject *op)\r
+{\r
+ if (restricted())\r
+ return NULL;\r
+ Py_INCREF(op->func_code);\r
+ return op->func_code;\r
+}\r
+\r
+static int\r
+func_set_code(PyFunctionObject *op, PyObject *value)\r
+{\r
+ PyObject *tmp;\r
+ Py_ssize_t nfree, nclosure;\r
+\r
+ if (restricted())\r
+ return -1;\r
+ /* Not legal to del f.func_code or to set it to anything\r
+ * other than a code object. */\r
+ if (value == NULL || !PyCode_Check(value)) {\r
+ PyErr_SetString(PyExc_TypeError,\r
+ "__code__ must be set to a code object");\r
+ return -1;\r
+ }\r
+ nfree = PyCode_GetNumFree((PyCodeObject *)value);\r
+ nclosure = (op->func_closure == NULL ? 0 :\r
+ PyTuple_GET_SIZE(op->func_closure));\r
+ if (nclosure != nfree) {\r
+ PyErr_Format(PyExc_ValueError,\r
+ "%s() requires a code object with %zd free vars,"\r
+ " not %zd",\r
+ PyString_AsString(op->func_name),\r
+ nclosure, nfree);\r
+ return -1;\r
+ }\r
+ tmp = op->func_code;\r
+ Py_INCREF(value);\r
+ op->func_code = value;\r
+ Py_DECREF(tmp);\r
+ return 0;\r
+}\r
+\r
+static PyObject *\r
+func_get_name(PyFunctionObject *op)\r
+{\r
+ Py_INCREF(op->func_name);\r
+ return op->func_name;\r
+}\r
+\r
+static int\r
+func_set_name(PyFunctionObject *op, PyObject *value)\r
+{\r
+ PyObject *tmp;\r
+\r
+ if (restricted())\r
+ return -1;\r
+ /* Not legal to del f.func_name or to set it to anything\r
+ * other than a string object. */\r
+ if (value == NULL || !PyString_Check(value)) {\r
+ PyErr_SetString(PyExc_TypeError,\r
+ "__name__ must be set to a string object");\r
+ return -1;\r
+ }\r
+ tmp = op->func_name;\r
+ Py_INCREF(value);\r
+ op->func_name = value;\r
+ Py_DECREF(tmp);\r
+ return 0;\r
+}\r
+\r
+static PyObject *\r
+func_get_defaults(PyFunctionObject *op)\r
+{\r
+ if (restricted())\r
+ return NULL;\r
+ if (op->func_defaults == NULL) {\r
+ Py_INCREF(Py_None);\r
+ return Py_None;\r
+ }\r
+ Py_INCREF(op->func_defaults);\r
+ return op->func_defaults;\r
+}\r
+\r
+static int\r
+func_set_defaults(PyFunctionObject *op, PyObject *value)\r
+{\r
+ PyObject *tmp;\r
+\r
+ if (restricted())\r
+ return -1;\r
+ /* Legal to del f.func_defaults.\r
+ * Can only set func_defaults to NULL or a tuple. */\r
+ if (value == Py_None)\r
+ value = NULL;\r
+ if (value != NULL && !PyTuple_Check(value)) {\r
+ PyErr_SetString(PyExc_TypeError,\r
+ "__defaults__ must be set to a tuple object");\r
+ return -1;\r
+ }\r
+ tmp = op->func_defaults;\r
+ Py_XINCREF(value);\r
+ op->func_defaults = value;\r
+ Py_XDECREF(tmp);\r
+ return 0;\r
+}\r
+\r
+static PyGetSetDef func_getsetlist[] = {\r
+ {"func_code", (getter)func_get_code, (setter)func_set_code},\r
+ {"__code__", (getter)func_get_code, (setter)func_set_code},\r
+ {"func_defaults", (getter)func_get_defaults,\r
+ (setter)func_set_defaults},\r
+ {"__defaults__", (getter)func_get_defaults,\r
+ (setter)func_set_defaults},\r
+ {"func_dict", (getter)func_get_dict, (setter)func_set_dict},\r
+ {"__dict__", (getter)func_get_dict, (setter)func_set_dict},\r
+ {"func_name", (getter)func_get_name, (setter)func_set_name},\r
+ {"__name__", (getter)func_get_name, (setter)func_set_name},\r
+ {NULL} /* Sentinel */\r
+};\r
+\r
+PyDoc_STRVAR(func_doc,\r
+"function(code, globals[, name[, argdefs[, closure]]])\n\\r
+\n\\r
+Create a function object from a code object and a dictionary.\n\\r
+The optional name string overrides the name from the code object.\n\\r
+The optional argdefs tuple specifies the default argument values.\n\\r
+The optional closure tuple supplies the bindings for free variables.");\r
+\r
+/* func_new() maintains the following invariants for closures. The\r
+ closure must correspond to the free variables of the code object.\r
+\r
+ if len(code.co_freevars) == 0:\r
+ closure = NULL\r
+ else:\r
+ len(closure) == len(code.co_freevars)\r
+ for every elt in closure, type(elt) == cell\r
+*/\r
+\r
+static PyObject *\r
+func_new(PyTypeObject* type, PyObject* args, PyObject* kw)\r
+{\r
+ PyCodeObject *code;\r
+ PyObject *globals;\r
+ PyObject *name = Py_None;\r
+ PyObject *defaults = Py_None;\r
+ PyObject *closure = Py_None;\r
+ PyFunctionObject *newfunc;\r
+ Py_ssize_t nfree, nclosure;\r
+ static char *kwlist[] = {"code", "globals", "name",\r
+ "argdefs", "closure", 0};\r
+\r
+ if (!PyArg_ParseTupleAndKeywords(args, kw, "O!O!|OOO:function",\r
+ kwlist,\r
+ &PyCode_Type, &code,\r
+ &PyDict_Type, &globals,\r
+ &name, &defaults, &closure))\r
+ return NULL;\r
+ if (name != Py_None && !PyString_Check(name)) {\r
+ PyErr_SetString(PyExc_TypeError,\r
+ "arg 3 (name) must be None or string");\r
+ return NULL;\r
+ }\r
+ if (defaults != Py_None && !PyTuple_Check(defaults)) {\r
+ PyErr_SetString(PyExc_TypeError,\r
+ "arg 4 (defaults) must be None or tuple");\r
+ return NULL;\r
+ }\r
+ nfree = PyTuple_GET_SIZE(code->co_freevars);\r
+ if (!PyTuple_Check(closure)) {\r
+ if (nfree && closure == Py_None) {\r
+ PyErr_SetString(PyExc_TypeError,\r
+ "arg 5 (closure) must be tuple");\r
+ return NULL;\r
+ }\r
+ else if (closure != Py_None) {\r
+ PyErr_SetString(PyExc_TypeError,\r
+ "arg 5 (closure) must be None or tuple");\r
+ return NULL;\r
+ }\r
+ }\r
+\r
+ /* check that the closure is well-formed */\r
+ nclosure = closure == Py_None ? 0 : PyTuple_GET_SIZE(closure);\r
+ if (nfree != nclosure)\r
+ return PyErr_Format(PyExc_ValueError,\r
+ "%s requires closure of length %zd, not %zd",\r
+ PyString_AS_STRING(code->co_name),\r
+ nfree, nclosure);\r
+ if (nclosure) {\r
+ Py_ssize_t i;\r
+ for (i = 0; i < nclosure; i++) {\r
+ PyObject *o = PyTuple_GET_ITEM(closure, i);\r
+ if (!PyCell_Check(o)) {\r
+ return PyErr_Format(PyExc_TypeError,\r
+ "arg 5 (closure) expected cell, found %s",\r
+ o->ob_type->tp_name);\r
+ }\r
+ }\r
+ }\r
+\r
+ newfunc = (PyFunctionObject *)PyFunction_New((PyObject *)code,\r
+ globals);\r
+ if (newfunc == NULL)\r
+ return NULL;\r
+\r
+ if (name != Py_None) {\r
+ Py_INCREF(name);\r
+ Py_DECREF(newfunc->func_name);\r
+ newfunc->func_name = name;\r
+ }\r
+ if (defaults != Py_None) {\r
+ Py_INCREF(defaults);\r
+ newfunc->func_defaults = defaults;\r
+ }\r
+ if (closure != Py_None) {\r
+ Py_INCREF(closure);\r
+ newfunc->func_closure = closure;\r
+ }\r
+\r
+ return (PyObject *)newfunc;\r
+}\r
+\r
+static void\r
+func_dealloc(PyFunctionObject *op)\r
+{\r
+ _PyObject_GC_UNTRACK(op);\r
+ if (op->func_weakreflist != NULL)\r
+ PyObject_ClearWeakRefs((PyObject *) op);\r
+ Py_DECREF(op->func_code);\r
+ Py_DECREF(op->func_globals);\r
+ Py_XDECREF(op->func_module);\r
+ Py_DECREF(op->func_name);\r
+ Py_XDECREF(op->func_defaults);\r
+ Py_XDECREF(op->func_doc);\r
+ Py_XDECREF(op->func_dict);\r
+ Py_XDECREF(op->func_closure);\r
+ PyObject_GC_Del(op);\r
+}\r
+\r
+static PyObject*\r
+func_repr(PyFunctionObject *op)\r
+{\r
+ return PyString_FromFormat("<function %s at %p>",\r
+ PyString_AsString(op->func_name),\r
+ op);\r
+}\r
+\r
+static int\r
+func_traverse(PyFunctionObject *f, visitproc visit, void *arg)\r
+{\r
+ Py_VISIT(f->func_code);\r
+ Py_VISIT(f->func_globals);\r
+ Py_VISIT(f->func_module);\r
+ Py_VISIT(f->func_defaults);\r
+ Py_VISIT(f->func_doc);\r
+ Py_VISIT(f->func_name);\r
+ Py_VISIT(f->func_dict);\r
+ Py_VISIT(f->func_closure);\r
+ return 0;\r
+}\r
+\r
+static PyObject *\r
+function_call(PyObject *func, PyObject *arg, PyObject *kw)\r
+{\r
+ PyObject *result;\r
+ PyObject *argdefs;\r
+ PyObject *kwtuple = NULL;\r
+ PyObject **d, **k;\r
+ Py_ssize_t nk, nd;\r
+\r
+ argdefs = PyFunction_GET_DEFAULTS(func);\r
+ if (argdefs != NULL && PyTuple_Check(argdefs)) {\r
+ d = &PyTuple_GET_ITEM((PyTupleObject *)argdefs, 0);\r
+ nd = PyTuple_GET_SIZE(argdefs);\r
+ }\r
+ else {\r
+ d = NULL;\r
+ nd = 0;\r
+ }\r
+\r
+ if (kw != NULL && PyDict_Check(kw)) {\r
+ Py_ssize_t pos, i;\r
+ nk = PyDict_Size(kw);\r
+ kwtuple = PyTuple_New(2*nk);\r
+ if (kwtuple == NULL)\r
+ return NULL;\r
+ k = &PyTuple_GET_ITEM(kwtuple, 0);\r
+ pos = i = 0;\r
+ while (PyDict_Next(kw, &pos, &k[i], &k[i+1])) {\r
+ Py_INCREF(k[i]);\r
+ Py_INCREF(k[i+1]);\r
+ i += 2;\r
+ }\r
+ nk = i/2;\r
+ }\r
+ else {\r
+ k = NULL;\r
+ nk = 0;\r
+ }\r
+\r
+ result = PyEval_EvalCodeEx(\r
+ (PyCodeObject *)PyFunction_GET_CODE(func),\r
+ PyFunction_GET_GLOBALS(func), (PyObject *)NULL,\r
+ &PyTuple_GET_ITEM(arg, 0), PyTuple_GET_SIZE(arg),\r
+ k, nk, d, nd,\r
+ PyFunction_GET_CLOSURE(func));\r
+\r
+ Py_XDECREF(kwtuple);\r
+\r
+ return result;\r
+}\r
+\r
+/* Bind a function to an object */\r
+static PyObject *\r
+func_descr_get(PyObject *func, PyObject *obj, PyObject *type)\r
+{\r
+ if (obj == Py_None)\r
+ obj = NULL;\r
+ return PyMethod_New(func, obj, type);\r
+}\r
+\r
+PyTypeObject PyFunction_Type = {\r
+ PyVarObject_HEAD_INIT(&PyType_Type, 0)\r
+ "function",\r
+ sizeof(PyFunctionObject),\r
+ 0,\r
+ (destructor)func_dealloc, /* tp_dealloc */\r
+ 0, /* tp_print */\r
+ 0, /* tp_getattr */\r
+ 0, /* tp_setattr */\r
+ 0, /* tp_compare */\r
+ (reprfunc)func_repr, /* tp_repr */\r
+ 0, /* tp_as_number */\r
+ 0, /* tp_as_sequence */\r
+ 0, /* tp_as_mapping */\r
+ 0, /* tp_hash */\r
+ function_call, /* tp_call */\r
+ 0, /* tp_str */\r
+ PyObject_GenericGetAttr, /* tp_getattro */\r
+ PyObject_GenericSetAttr, /* tp_setattro */\r
+ 0, /* tp_as_buffer */\r
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */\r
+ func_doc, /* tp_doc */\r
+ (traverseproc)func_traverse, /* tp_traverse */\r
+ 0, /* tp_clear */\r
+ 0, /* tp_richcompare */\r
+ offsetof(PyFunctionObject, func_weakreflist), /* tp_weaklistoffset */\r
+ 0, /* tp_iter */\r
+ 0, /* tp_iternext */\r
+ 0, /* tp_methods */\r
+ func_memberlist, /* tp_members */\r
+ func_getsetlist, /* tp_getset */\r
+ 0, /* tp_base */\r
+ 0, /* tp_dict */\r
+ func_descr_get, /* tp_descr_get */\r
+ 0, /* tp_descr_set */\r
+ offsetof(PyFunctionObject, func_dict), /* tp_dictoffset */\r
+ 0, /* tp_init */\r
+ 0, /* tp_alloc */\r
+ func_new, /* tp_new */\r
+};\r
+\r
+\r
+/* Class method object */\r
+\r
+/* A class method receives the class as implicit first argument,\r
+ just like an instance method receives the instance.\r
+ To declare a class method, use this idiom:\r
+\r
+ class C:\r
+ def f(cls, arg1, arg2, ...): ...\r
+ f = classmethod(f)\r
+\r
+ It can be called either on the class (e.g. C.f()) or on an instance\r
+ (e.g. C().f()); the instance is ignored except for its class.\r
+ If a class method is called for a derived class, the derived class\r
+ object is passed as the implied first argument.\r
+\r
+ Class methods are different than C++ or Java static methods.\r
+ If you want those, see static methods below.\r
+*/\r
+\r
+typedef struct {\r
+ PyObject_HEAD\r
+ PyObject *cm_callable;\r
+} classmethod;\r
+\r
+static void\r
+cm_dealloc(classmethod *cm)\r
+{\r
+ _PyObject_GC_UNTRACK((PyObject *)cm);\r
+ Py_XDECREF(cm->cm_callable);\r
+ Py_TYPE(cm)->tp_free((PyObject *)cm);\r
+}\r
+\r
+static int\r
+cm_traverse(classmethod *cm, visitproc visit, void *arg)\r
+{\r
+ Py_VISIT(cm->cm_callable);\r
+ return 0;\r
+}\r
+\r
+static int\r
+cm_clear(classmethod *cm)\r
+{\r
+ Py_CLEAR(cm->cm_callable);\r
+ return 0;\r
+}\r
+\r
+\r
+static PyObject *\r
+cm_descr_get(PyObject *self, PyObject *obj, PyObject *type)\r
+{\r
+ classmethod *cm = (classmethod *)self;\r
+\r
+ if (cm->cm_callable == NULL) {\r
+ PyErr_SetString(PyExc_RuntimeError,\r
+ "uninitialized classmethod object");\r
+ return NULL;\r
+ }\r
+ if (type == NULL)\r
+ type = (PyObject *)(Py_TYPE(obj));\r
+ return PyMethod_New(cm->cm_callable,\r
+ type, (PyObject *)(Py_TYPE(type)));\r
+}\r
+\r
+static int\r
+cm_init(PyObject *self, PyObject *args, PyObject *kwds)\r
+{\r
+ classmethod *cm = (classmethod *)self;\r
+ PyObject *callable;\r
+\r
+ if (!PyArg_UnpackTuple(args, "classmethod", 1, 1, &callable))\r
+ return -1;\r
+ if (!_PyArg_NoKeywords("classmethod", kwds))\r
+ return -1;\r
+ Py_INCREF(callable);\r
+ cm->cm_callable = callable;\r
+ return 0;\r
+}\r
+\r
+static PyMemberDef cm_memberlist[] = {\r
+ {"__func__", T_OBJECT, offsetof(classmethod, cm_callable), READONLY},\r
+ {NULL} /* Sentinel */\r
+};\r
+\r
+PyDoc_STRVAR(classmethod_doc,\r
+"classmethod(function) -> method\n\\r
+\n\\r
+Convert a function to be a class method.\n\\r
+\n\\r
+A class method receives the class as implicit first argument,\n\\r
+just like an instance method receives the instance.\n\\r
+To declare a class method, use this idiom:\n\\r
+\n\\r
+ class C:\n\\r
+ def f(cls, arg1, arg2, ...): ...\n\\r
+ f = classmethod(f)\n\\r
+\n\\r
+It can be called either on the class (e.g. C.f()) or on an instance\n\\r
+(e.g. C().f()). The instance is ignored except for its class.\n\\r
+If a class method is called for a derived class, the derived class\n\\r
+object is passed as the implied first argument.\n\\r
+\n\\r
+Class methods are different than C++ or Java static methods.\n\\r
+If you want those, see the staticmethod builtin.");\r
+\r
+PyTypeObject PyClassMethod_Type = {\r
+ PyVarObject_HEAD_INIT(&PyType_Type, 0)\r
+ "classmethod",\r
+ sizeof(classmethod),\r
+ 0,\r
+ (destructor)cm_dealloc, /* tp_dealloc */\r
+ 0, /* tp_print */\r
+ 0, /* tp_getattr */\r
+ 0, /* tp_setattr */\r
+ 0, /* tp_compare */\r
+ 0, /* 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_BASETYPE | Py_TPFLAGS_HAVE_GC,\r
+ classmethod_doc, /* tp_doc */\r
+ (traverseproc)cm_traverse, /* tp_traverse */\r
+ (inquiry)cm_clear, /* tp_clear */\r
+ 0, /* tp_richcompare */\r
+ 0, /* tp_weaklistoffset */\r
+ 0, /* tp_iter */\r
+ 0, /* tp_iternext */\r
+ 0, /* tp_methods */\r
+ cm_memberlist, /* tp_members */\r
+ 0, /* tp_getset */\r
+ 0, /* tp_base */\r
+ 0, /* tp_dict */\r
+ cm_descr_get, /* tp_descr_get */\r
+ 0, /* tp_descr_set */\r
+ 0, /* tp_dictoffset */\r
+ cm_init, /* tp_init */\r
+ PyType_GenericAlloc, /* tp_alloc */\r
+ PyType_GenericNew, /* tp_new */\r
+ PyObject_GC_Del, /* tp_free */\r
+};\r
+\r
+PyObject *\r
+PyClassMethod_New(PyObject *callable)\r
+{\r
+ classmethod *cm = (classmethod *)\r
+ PyType_GenericAlloc(&PyClassMethod_Type, 0);\r
+ if (cm != NULL) {\r
+ Py_INCREF(callable);\r
+ cm->cm_callable = callable;\r
+ }\r
+ return (PyObject *)cm;\r
+}\r
+\r
+\r
+/* Static method object */\r
+\r
+/* A static method does not receive an implicit first argument.\r
+ To declare a static method, use this idiom:\r
+\r
+ class C:\r
+ def f(arg1, arg2, ...): ...\r
+ f = staticmethod(f)\r
+\r
+ It can be called either on the class (e.g. C.f()) or on an instance\r
+ (e.g. C().f()); the instance is ignored except for its class.\r
+\r
+ Static methods in Python are similar to those found in Java or C++.\r
+ For a more advanced concept, see class methods above.\r
+*/\r
+\r
+typedef struct {\r
+ PyObject_HEAD\r
+ PyObject *sm_callable;\r
+} staticmethod;\r
+\r
+static void\r
+sm_dealloc(staticmethod *sm)\r
+{\r
+ _PyObject_GC_UNTRACK((PyObject *)sm);\r
+ Py_XDECREF(sm->sm_callable);\r
+ Py_TYPE(sm)->tp_free((PyObject *)sm);\r
+}\r
+\r
+static int\r
+sm_traverse(staticmethod *sm, visitproc visit, void *arg)\r
+{\r
+ Py_VISIT(sm->sm_callable);\r
+ return 0;\r
+}\r
+\r
+static int\r
+sm_clear(staticmethod *sm)\r
+{\r
+ Py_CLEAR(sm->sm_callable);\r
+ return 0;\r
+}\r
+\r
+static PyObject *\r
+sm_descr_get(PyObject *self, PyObject *obj, PyObject *type)\r
+{\r
+ staticmethod *sm = (staticmethod *)self;\r
+\r
+ if (sm->sm_callable == NULL) {\r
+ PyErr_SetString(PyExc_RuntimeError,\r
+ "uninitialized staticmethod object");\r
+ return NULL;\r
+ }\r
+ Py_INCREF(sm->sm_callable);\r
+ return sm->sm_callable;\r
+}\r
+\r
+static int\r
+sm_init(PyObject *self, PyObject *args, PyObject *kwds)\r
+{\r
+ staticmethod *sm = (staticmethod *)self;\r
+ PyObject *callable;\r
+\r
+ if (!PyArg_UnpackTuple(args, "staticmethod", 1, 1, &callable))\r
+ return -1;\r
+ if (!_PyArg_NoKeywords("staticmethod", kwds))\r
+ return -1;\r
+ Py_INCREF(callable);\r
+ sm->sm_callable = callable;\r
+ return 0;\r
+}\r
+\r
+static PyMemberDef sm_memberlist[] = {\r
+ {"__func__", T_OBJECT, offsetof(staticmethod, sm_callable), READONLY},\r
+ {NULL} /* Sentinel */\r
+};\r
+\r
+PyDoc_STRVAR(staticmethod_doc,\r
+"staticmethod(function) -> method\n\\r
+\n\\r
+Convert a function to be a static method.\n\\r
+\n\\r
+A static method does not receive an implicit first argument.\n\\r
+To declare a static method, use this idiom:\n\\r
+\n\\r
+ class C:\n\\r
+ def f(arg1, arg2, ...): ...\n\\r
+ f = staticmethod(f)\n\\r
+\n\\r
+It can be called either on the class (e.g. C.f()) or on an instance\n\\r
+(e.g. C().f()). The instance is ignored except for its class.\n\\r
+\n\\r
+Static methods in Python are similar to those found in Java or C++.\n\\r
+For a more advanced concept, see the classmethod builtin.");\r
+\r
+PyTypeObject PyStaticMethod_Type = {\r
+ PyVarObject_HEAD_INIT(&PyType_Type, 0)\r
+ "staticmethod",\r
+ sizeof(staticmethod),\r
+ 0,\r
+ (destructor)sm_dealloc, /* tp_dealloc */\r
+ 0, /* tp_print */\r
+ 0, /* tp_getattr */\r
+ 0, /* tp_setattr */\r
+ 0, /* tp_compare */\r
+ 0, /* 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_BASETYPE | Py_TPFLAGS_HAVE_GC,\r
+ staticmethod_doc, /* tp_doc */\r
+ (traverseproc)sm_traverse, /* tp_traverse */\r
+ (inquiry)sm_clear, /* tp_clear */\r
+ 0, /* tp_richcompare */\r
+ 0, /* tp_weaklistoffset */\r
+ 0, /* tp_iter */\r
+ 0, /* tp_iternext */\r
+ 0, /* tp_methods */\r
+ sm_memberlist, /* tp_members */\r
+ 0, /* tp_getset */\r
+ 0, /* tp_base */\r
+ 0, /* tp_dict */\r
+ sm_descr_get, /* tp_descr_get */\r
+ 0, /* tp_descr_set */\r
+ 0, /* tp_dictoffset */\r
+ sm_init, /* tp_init */\r
+ PyType_GenericAlloc, /* tp_alloc */\r
+ PyType_GenericNew, /* tp_new */\r
+ PyObject_GC_Del, /* tp_free */\r
+};\r
+\r
+PyObject *\r
+PyStaticMethod_New(PyObject *callable)\r
+{\r
+ staticmethod *sm = (staticmethod *)\r
+ PyType_GenericAlloc(&PyStaticMethod_Type, 0);\r
+ if (sm != NULL) {\r
+ Py_INCREF(callable);\r
+ sm->sm_callable = callable;\r
+ }\r
+ return (PyObject *)sm;\r
+}\r
projects / mirror_edk2.git / blobdiff