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Moved cmp_member() to abstract.c, as PySequence_Contains() [with

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swapped arguments].

Also make sure that no use of a function pointer gotten from a
tp_as_sequence or tp_as_mapping structure is made without checking it
for NULL first.
This commit is contained in:
Guido van Rossum 1998-05-22 00:52:29 +00:00
parent 09df08a105
commit 7e33c6e896
1 changed files with 2 additions and 53 deletions
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55
Python/ceval.c
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@ -84,7 +84,6 @@ static int slice_index Py_PROTO((PyObject *, int *));
static PyObject *apply_slice Py_PROTO((PyObject *, PyObject *, PyObject *)); static PyObject *apply_slice Py_PROTO((PyObject *, PyObject *, PyObject *));
static int assign_slice Py_PROTO((PyObject *, PyObject *, static int assign_slice Py_PROTO((PyObject *, PyObject *,
PyObject *, PyObject *)); PyObject *, PyObject *));
static int cmp_member Py_PROTO((PyObject *, PyObject *));
static PyObject *cmp_outcome Py_PROTO((int, PyObject *, PyObject *)); static PyObject *cmp_outcome Py_PROTO((int, PyObject *, PyObject *));
static int import_from Py_PROTO((PyObject *, PyObject *, PyObject *)); static int import_from Py_PROTO((PyObject *, PyObject *, PyObject *));
static PyObject *build_class Py_PROTO((PyObject *, PyObject *, PyObject *)); static PyObject *build_class Py_PROTO((PyObject *, PyObject *, PyObject *));
@ -2496,7 +2495,7 @@ loop_subscript(v, w)
{ {
PySequenceMethods *sq = v->ob_type->tp_as_sequence; PySequenceMethods *sq = v->ob_type->tp_as_sequence;
int i; int i;
if (sq == NULL) { if (sq == NULL || sq->sq_item == NULL) {
PyErr_SetString(PyExc_TypeError, "loop over non-sequence"); PyErr_SetString(PyExc_TypeError, "loop over non-sequence");
return NULL; return NULL;
} }
@ -2559,56 +2558,6 @@ assign_slice(u, v, w, x) /* u[v:w] = x */
return PySequence_SetSlice(u, ilow, ihigh, x); return PySequence_SetSlice(u, ilow, ihigh, x);
} }
static int
cmp_member(v, w)
PyObject *v, *w;
{
int i, cmp;
PyObject *x;
PySequenceMethods *sq;
/* Special case for char in string */
if (PyString_Check(w)) {
register char *s, *end;
register char c;
if (!PyString_Check(v) || PyString_Size(v) != 1) {
PyErr_SetString(PyExc_TypeError,
"string member test needs char left operand");
return -1;
}
c = PyString_AsString(v)[0];
s = PyString_AsString(w);
end = s + PyString_Size(w);
while (s < end) {
if (c == *s++)
return 1;
}
return 0;
}
sq = w->ob_type->tp_as_sequence;
if (sq == NULL) {
PyErr_SetString(PyExc_TypeError,
"'in' or 'not in' needs sequence right argument");
return -1;
}
for (i = 0; ; i++) {
x = (*sq->sq_item)(w, i);
if (x == NULL) {
if (PyErr_Occurred() == PyExc_IndexError) {
PyErr_Clear();
break;
}
return -1;
}
cmp = PyObject_Compare(v, x);
Py_XDECREF(x);
if (cmp == 0)
return 1;
if (PyErr_Occurred())
return -1;
}
return 0;
}
static PyObject * static PyObject *
cmp_outcome(op, v, w) cmp_outcome(op, v, w)
int op; int op;
@ -2626,7 +2575,7 @@ cmp_outcome(op, v, w)
break; break;
case IN: case IN:
case NOT_IN: case NOT_IN:
res = cmp_member(v, w); res = PySequence_Contains(w, v);
if (res < 0) if (res < 0)
return NULL; return NULL;
if (op == (int) NOT_IN) if (op == (int) NOT_IN)