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-
- /* Function object implementation */
-
- #include "Python.h"
- #include "compile.h"
- #include "structmember.h"
-
- PyObject *
- PyFunction_New(PyObject *code, PyObject *globals)
- {
- PyFunctionObject *op = PyObject_NEW(PyFunctionObject,
- &PyFunction_Type);
- if (op != NULL) {
- PyObject *doc;
- PyObject *consts;
- Py_INCREF(code);
- op->func_code = code;
- Py_INCREF(globals);
- op->func_globals = globals;
- op->func_name = ((PyCodeObject *)code)->co_name;
- Py_INCREF(op->func_name);
- op->func_defaults = NULL; /* No default arguments */
- consts = ((PyCodeObject *)code)->co_consts;
- if (PyTuple_Size(consts) >= 1) {
- doc = PyTuple_GetItem(consts, 0);
- if (!PyString_Check(doc) && !PyUnicode_Check(doc))
- doc = Py_None;
- }
- else
- doc = Py_None;
- Py_INCREF(doc);
- op->func_doc = doc;
- }
- PyObject_GC_Init(op);
- return (PyObject *)op;
- }
-
- PyObject *
- PyFunction_GetCode(PyObject *op)
- {
- if (!PyFunction_Check(op)) {
- PyErr_BadInternalCall();
- return NULL;
- }
- return ((PyFunctionObject *) op) -> func_code;
- }
-
- PyObject *
- PyFunction_GetGlobals(PyObject *op)
- {
- if (!PyFunction_Check(op)) {
- PyErr_BadInternalCall();
- return NULL;
- }
- return ((PyFunctionObject *) op) -> func_globals;
- }
-
- PyObject *
- PyFunction_GetDefaults(PyObject *op)
- {
- if (!PyFunction_Check(op)) {
- PyErr_BadInternalCall();
- return NULL;
- }
- return ((PyFunctionObject *) op) -> func_defaults;
- }
-
- int
- PyFunction_SetDefaults(PyObject *op, PyObject *defaults)
- {
- if (!PyFunction_Check(op)) {
- PyErr_BadInternalCall();
- return -1;
- }
- if (defaults == Py_None)
- defaults = NULL;
- else if (PyTuple_Check(defaults)) {
- Py_XINCREF(defaults);
- }
- else {
- PyErr_SetString(PyExc_SystemError, "non-tuple default args");
- return -1;
- }
- Py_XDECREF(((PyFunctionObject *) op) -> func_defaults);
- ((PyFunctionObject *) op) -> func_defaults = defaults;
- return 0;
- }
-
- /* Methods */
-
- #define OFF(x) offsetof(PyFunctionObject, x)
-
- static struct memberlist func_memberlist[] = {
- {"func_code", T_OBJECT, OFF(func_code)},
- {"func_globals",T_OBJECT, OFF(func_globals), READONLY},
- {"func_name", T_OBJECT, OFF(func_name), READONLY},
- {"__name__", T_OBJECT, OFF(func_name), READONLY},
- {"func_defaults",T_OBJECT, OFF(func_defaults)},
- {"func_doc", T_OBJECT, OFF(func_doc)},
- {"__doc__", T_OBJECT, OFF(func_doc)},
- {NULL} /* Sentinel */
- };
-
- static PyObject *
- func_getattr(PyFunctionObject *op, char *name)
- {
- if (name[0] != '_' && PyEval_GetRestricted()) {
- PyErr_SetString(PyExc_RuntimeError,
- "function attributes not accessible in restricted mode");
- return NULL;
- }
- return PyMember_Get((char *)op, func_memberlist, name);
- }
-
- static int
- func_setattr(PyFunctionObject *op, char *name, PyObject *value)
- {
- if (PyEval_GetRestricted()) {
- PyErr_SetString(PyExc_RuntimeError,
- "function attributes not settable in restricted mode");
- return -1;
- }
- if (strcmp(name, "func_code") == 0) {
- if (value == NULL || !PyCode_Check(value)) {
- PyErr_SetString(
- PyExc_TypeError,
- "func_code must be set to a code object");
- return -1;
- }
- }
- else if (strcmp(name, "func_defaults") == 0) {
- if (value != Py_None && !PyTuple_Check(value)) {
- PyErr_SetString(
- PyExc_TypeError,
- "func_defaults must be set to a tuple object");
- return -1;
- }
- if (value == Py_None)
- value = NULL;
- }
- return PyMember_Set((char *)op, func_memberlist, name, value);
- }
-
- static void
- func_dealloc(PyFunctionObject *op)
- {
- PyObject_GC_Fini(op);
- Py_DECREF(op->func_code);
- Py_DECREF(op->func_globals);
- Py_DECREF(op->func_name);
- Py_XDECREF(op->func_defaults);
- Py_XDECREF(op->func_doc);
- op = (PyFunctionObject *) PyObject_AS_GC(op);
- PyObject_DEL(op);
- }
-
- static PyObject*
- func_repr(PyFunctionObject *op)
- {
- char buf[140];
- if (op->func_name == Py_None)
- sprintf(buf, "<anonymous function at %p>", op);
- else
- sprintf(buf, "<function %.100s at %p>",
- PyString_AsString(op->func_name),
- op);
- return PyString_FromString(buf);
- }
-
- static int
- func_compare(PyFunctionObject *f, PyFunctionObject *g)
- {
- int c;
- if (f->func_globals != g->func_globals)
- return (f->func_globals < g->func_globals) ? -1 : 1;
- if (f->func_defaults != g->func_defaults) {
- if (f->func_defaults == NULL)
- return -1;
- if (g->func_defaults == NULL)
- return 1;
- c = PyObject_Compare(f->func_defaults, g->func_defaults);
- if (c != 0)
- return c;
- }
- return PyObject_Compare(f->func_code, g->func_code);
- }
-
- static long
- func_hash(PyFunctionObject *f)
- {
- long h,x;
- h = PyObject_Hash(f->func_code);
- if (h == -1) return h;
- x = _Py_HashPointer(f->func_globals);
- if (x == -1) return x;
- h ^= x;
- if (h == -1) h = -2;
- return h;
- }
-
- static int
- func_traverse(PyFunctionObject *f, visitproc visit, void *arg)
- {
- int err;
- if (f->func_code) {
- err = visit(f->func_code, arg);
- if (err)
- return err;
- }
- if (f->func_globals) {
- err = visit(f->func_globals, arg);
- if (err)
- return err;
- }
- if (f->func_defaults) {
- err = visit(f->func_defaults, arg);
- if (err)
- return err;
- }
- if (f->func_doc) {
- err = visit(f->func_doc, arg);
- if (err)
- return err;
- }
- if (f->func_name) {
- err = visit(f->func_name, arg);
- if (err)
- return err;
- }
- return 0;
- }
-
- PyTypeObject PyFunction_Type = {
- PyObject_HEAD_INIT(&PyType_Type)
- 0,
- "function",
- sizeof(PyFunctionObject) + PyGC_HEAD_SIZE,
- 0,
- (destructor)func_dealloc, /*tp_dealloc*/
- 0, /*tp_print*/
- (getattrfunc)func_getattr, /*tp_getattr*/
- (setattrfunc)func_setattr, /*tp_setattr*/
- (cmpfunc)func_compare, /*tp_compare*/
- (reprfunc)func_repr, /*tp_repr*/
- 0, /*tp_as_number*/
- 0, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- (hashfunc)func_hash, /*tp_hash*/
- 0, /*tp_call*/
- 0, /*tp_str*/
- 0, /*tp_getattro*/
- 0, /*tp_setattro*/
- 0, /* tp_as_buffer */
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_GC, /*tp_flags*/
- 0, /* tp_doc */
- (traverseproc)func_traverse, /* tp_traverse */
- };
-