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