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Add extra check on whether 'tp_as_number' is still non-NULL after coercion,

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in the PyNumber_* functions. Also, remove unnecessary tests from
PyNumber_Multiply: after BINOP(), neither argument can be an instance.
This commit is contained in:
Thomas Wouters 2000-08-23 23:16:10 +00:00
parent 635f6fb0e9
commit bf6cfa5f8e
1 changed files with 28 additions and 24 deletions
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52
Objects/abstract.c
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@ -294,7 +294,8 @@ PyNumber_Or(PyObject *v, PyObject *w)
PyObject * (*f)(PyObject *, PyObject *);
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_or) != NULL)
if (v->ob_type->tp_as_number != NULL &&
(f = v->ob_type->tp_as_number->nb_or) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
@ -313,7 +314,8 @@ PyNumber_Xor(PyObject *v, PyObject *w)
PyObject * (*f)(PyObject *, PyObject *);
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_xor) != NULL)
if (v->ob_type->tp_as_number != NULL &&
(f = v->ob_type->tp_as_number->nb_xor) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
@ -332,7 +334,8 @@ PyNumber_And(PyObject *v, PyObject *w)
PyObject * (*f)(PyObject *, PyObject *);
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_and) != NULL)
if (v->ob_type->tp_as_number != NULL &&
(f = v->ob_type->tp_as_number->nb_and) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
@ -351,7 +354,8 @@ PyNumber_Lshift(PyObject *v, PyObject *w)
PyObject * (*f)(PyObject *, PyObject *);
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_lshift) != NULL)
if (v->ob_type->tp_as_number != NULL &&
(f = v->ob_type->tp_as_number->nb_lshift) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
@ -370,7 +374,8 @@ PyNumber_Rshift(PyObject *v, PyObject *w)
PyObject * (*f)(PyObject *, PyObject *);
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_rshift) != NULL)
if (v->ob_type->tp_as_number != NULL &&
(f = v->ob_type->tp_as_number->nb_rshift) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
@ -394,7 +399,8 @@ PyNumber_Add(PyObject *v, PyObject *w)
PyObject * (*f)(PyObject *, PyObject *);
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_add) != NULL)
if (v->ob_type->tp_as_number != NULL &&
(f = v->ob_type->tp_as_number->nb_add) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
@ -413,7 +419,8 @@ PyNumber_Subtract(PyObject *v, PyObject *w)
PyObject * (*f)(PyObject *, PyObject *);
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_subtract) != NULL)
if (v->ob_type->tp_as_number != NULL &&
(f = v->ob_type->tp_as_number->nb_subtract) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
@ -431,8 +438,7 @@ PyNumber_Multiply(PyObject *v, PyObject *w)
BINOP(v, w, "__mul__", "__rmul__", PyNumber_Multiply);
if (tp->tp_as_number != NULL &&
w->ob_type->tp_as_sequence != NULL &&
!PyInstance_Check(v)) {
w->ob_type->tp_as_sequence != NULL) {
/* number*sequence -- swap v and w */
PyObject *tmp = v;
v = w;
@ -442,17 +448,10 @@ PyNumber_Multiply(PyObject *v, PyObject *w)
if (tp->tp_as_number != NULL) {
PyObject *x = NULL;
PyObject * (*f)(PyObject *, PyObject *);
if (PyInstance_Check(v)) {
/* Instances of user-defined classes get their
other argument uncoerced, so they may
implement sequence*number as well as
number*number. */
Py_INCREF(v);
Py_INCREF(w);
}
else if (PyNumber_Coerce(&v, &w) != 0)
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_multiply) != NULL)
if (v->ob_type->tp_as_number != NULL &&
(f = v->ob_type->tp_as_number->nb_multiply) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
@ -489,7 +488,8 @@ PyNumber_Divide(PyObject *v, PyObject *w)
PyObject * (*f)(PyObject *, PyObject *);
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_divide) != NULL)
if (v->ob_type->tp_as_number != NULL &&
(f = v->ob_type->tp_as_number->nb_divide) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
@ -512,7 +512,8 @@ PyNumber_Remainder(PyObject *v, PyObject *w)
PyObject * (*f)(PyObject *, PyObject *);
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_remainder) != NULL)
if (v->ob_type->tp_as_number != NULL &&
(f = v->ob_type->tp_as_number->nb_remainder) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
@ -531,7 +532,8 @@ PyNumber_Divmod(PyObject *v, PyObject *w)
PyObject * (*f)(PyObject *, PyObject *);
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_divmod) != NULL)
if (v->ob_type->tp_as_number != NULL &&
(f = v->ob_type->tp_as_number->nb_divmod) != NULL)
x = (*f)(v, w);
Py_DECREF(v);
Py_DECREF(w);
@ -557,7 +559,8 @@ do_pow(PyObject *v, PyObject *w)
}
if (PyNumber_Coerce(&v, &w) != 0)
return NULL;
if ((f = v->ob_type->tp_as_number->nb_power) != NULL)
if (v->ob_type->tp_as_number != NULL &&
(f = v->ob_type->tp_as_number->nb_power) != NULL)
res = (*f)(v, w, Py_None);
else
res = type_error("pow(x, y) not defined for these operands");
@ -594,7 +597,8 @@ PyNumber_Power(PyObject *v, PyObject *w, PyObject *z)
z2 = z1;
if (PyNumber_Coerce(&w2, &z2) != 0)
goto error1;
if ((f = v1->ob_type->tp_as_number->nb_power) != NULL)
if (v->ob_type->tp_as_number != NULL &&
(f = v1->ob_type->tp_as_number->nb_power) != NULL)
res = (*f)(v1, w2, z2);
else
res = type_error(