mirror of https://github.com/python/cpython
A bunch of functions are now properly implemented in abstract.c, and
the code here becomes much simpler. In particular: abs(), divmod(), pow(), int(), long(), float(), len(), tuple(), list(). 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. A few other cosmetic things, such as properly reindenting slice().
This commit is contained in:
Guido van Rossum
parent
44e4d5a6fd
commit
09df08a105
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@ -48,9 +48,6 @@ PERFORMANCE OF THIS SOFTWARE.
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/* Forward */
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static PyObject *filterstring Py_PROTO((PyObject *, PyObject *));
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static PyObject *filtertuple Py_PROTO((PyObject *, PyObject *));
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static PyObject *int_from_string Py_PROTO((PyObject *));
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static PyObject *long_from_string Py_PROTO((PyObject *));
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static PyObject *float_from_string Py_PROTO((PyObject *));
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static PyObject *
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builtin___import__(self, args)
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@ -75,16 +72,10 @@ builtin_abs(self, args)
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PyObject *args;
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{
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PyObject *v;
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PyNumberMethods *nm;
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if (!PyArg_ParseTuple(args, "O:abs", &v))
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return NULL;
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if ((nm = v->ob_type->tp_as_number) == NULL) {
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PyErr_SetString(PyExc_TypeError,
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"abs() requires numeric argument");
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return NULL;
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}
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return (*nm->nb_absolute)(v);
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return PyNumber_Absolute(v);
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}
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static PyObject *
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@ -144,7 +135,8 @@ builtin_filter(self, args)
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return r;
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}
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if ((sqf = seq->ob_type->tp_as_sequence) == NULL) {
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sqf = seq->ob_type->tp_as_sequence;
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if (sqf == NULL || sqf->sq_length == NULL || sqf->sq_item == NULL) {
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PyErr_SetString(PyExc_TypeError,
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"argument 2 to filter() must be a sequence type");
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goto Fail_2;
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@ -245,14 +237,13 @@ builtin_cmp(self, args)
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PyObject *args;
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{
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PyObject *a, *b;
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long c;
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int c;
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if (!PyArg_ParseTuple(args, "OO:cmp", &a, &b))
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return NULL;
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c = PyObject_Compare(a, b);
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if (c && PyErr_Occurred())
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if (PyObject_Cmp(a, b, &c) < 0)
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return NULL;
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return PyInt_FromLong(c);
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return PyInt_FromLong((long)c);
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}
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static PyObject *
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@ -450,29 +441,6 @@ builtin_dir(self, args)
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return NULL;
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}
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static PyObject *
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do_divmod(v, w)
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PyObject *v, *w;
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{
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PyObject *res;
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if (PyInstance_Check(v) || PyInstance_Check(w))
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return PyInstance_DoBinOp(v, w, "__divmod__", "__rdivmod__",
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do_divmod);
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if (v->ob_type->tp_as_number == NULL ||
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w->ob_type->tp_as_number == NULL) {
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PyErr_SetString(PyExc_TypeError,
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"divmod() requires numeric or class instance arguments");
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return NULL;
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}
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if (PyNumber_Coerce(&v, &w) != 0)
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return NULL;
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res = (*v->ob_type->tp_as_number->nb_divmod)(v, w);
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Py_DECREF(v);
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Py_DECREF(w);
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return res;
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}
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static PyObject *
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builtin_divmod(self, args)
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PyObject *self;
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@ -482,7 +450,7 @@ builtin_divmod(self, args)
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if (!PyArg_ParseTuple(args, "OO:divmod", &v, &w))
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return NULL;
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return do_divmod(v, w);
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return PyNumber_Divmod(v, w);
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}
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static PyObject *
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@ -576,19 +544,10 @@ builtin_float(self, args)
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PyObject *args;
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{
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PyObject *v;
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PyNumberMethods *nb;
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if (!PyArg_ParseTuple(args, "O:float", &v))
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return NULL;
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if (PyString_Check(v))
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return float_from_string(v);
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if ((nb = v->ob_type->tp_as_number) == NULL ||
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nb->nb_float == NULL) {
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PyErr_SetString(PyExc_TypeError,
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"float() argument can't be converted to float");
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return NULL;
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}
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return (*nb->nb_float)(v);
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return PyNumber_Float(v);
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}
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static PyObject *
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@ -631,10 +590,12 @@ builtin_hasattr(self, args)
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v = PyObject_GetAttr(v, name);
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if (v == NULL) {
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PyErr_Clear();
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return PyInt_FromLong(0L);
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Py_INCREF(Py_False);
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return Py_False;
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}
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Py_DECREF(v);
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return PyInt_FromLong(1L);
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Py_INCREF(Py_True);
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return Py_True;
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}
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static PyObject *
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@ -682,11 +643,16 @@ builtin_map(self, args)
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for (len = 0, i = 0, sqp = seqs; i < n; ++i, ++sqp) {
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int curlen;
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PySequenceMethods *sqf;
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if ((sqp->seq = PyTuple_GetItem(args, i + 1)) == NULL)
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goto Fail_2;
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if (! (sqp->sqf = sqp->seq->ob_type->tp_as_sequence)) {
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sqp->sqf = sqf = sqp->seq->ob_type->tp_as_sequence;
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if (sqf == NULL ||
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sqf->sq_length == NULL ||
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sqf->sq_item == NULL)
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{
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static char errmsg[] =
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"argument %d to map() must be a sequence object";
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char errbuf[sizeof(errmsg) + 25];
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@ -916,15 +882,7 @@ builtin_int(self, args)
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if (!PyArg_ParseTuple(args, "O:int", &v))
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return NULL;
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if (PyString_Check(v))
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return int_from_string(v);
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if ((nb = v->ob_type->tp_as_number) == NULL ||
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nb->nb_int == NULL) {
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PyErr_SetString(PyExc_TypeError,
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"int() argument can't be converted to int");
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return NULL;
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}
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return (*nb->nb_int)(v);
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return PyNumber_Int(v);
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}
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static PyObject *
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@ -933,26 +891,10 @@ builtin_len(self, args)
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PyObject *args;
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{
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PyObject *v;
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long len;
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PyTypeObject *tp;
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if (!PyArg_ParseTuple(args, "O:len", &v))
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return NULL;
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tp = v->ob_type;
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if (tp->tp_as_sequence != NULL) {
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len = (*tp->tp_as_sequence->sq_length)(v);
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}
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else if (tp->tp_as_mapping != NULL) {
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len = (*tp->tp_as_mapping->mp_length)(v);
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}
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else {
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PyErr_SetString(PyExc_TypeError, "len() of unsized object");
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return NULL;
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}
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if (len < 0)
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return NULL;
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else
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return PyInt_FromLong(len);
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return PyInt_FromLong((long)PyObject_Length(v));
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}
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static PyObject *
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@ -961,33 +903,10 @@ builtin_list(self, args)
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PyObject *args;
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{
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PyObject *v;
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PySequenceMethods *sqf;
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if (!PyArg_ParseTuple(args, "O:list", &v))
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return NULL;
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if ((sqf = v->ob_type->tp_as_sequence) != NULL) {
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int n = (*sqf->sq_length)(v);
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int i;
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PyObject *l;
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if (n < 0)
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return NULL;
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l = PyList_New(n);
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if (l == NULL)
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return NULL;
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for (i = 0; i < n; i++) {
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PyObject *item = (*sqf->sq_item)(v, i);
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if (item == NULL) {
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Py_DECREF(l);
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l = NULL;
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break;
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}
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PyList_SetItem(l, i, item);
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}
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/* XXX Should support indefinite-length sequences */
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return l;
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}
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PyErr_SetString(PyExc_TypeError, "list() argument must be a sequence");
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return NULL;
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return PySequence_List(v);
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}
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@ -1003,8 +922,8 @@ builtin_slice(self, args)
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if (!PyArg_ParseTuple(args, "O|OO:slice", &start, &stop, &step))
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return NULL;
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/*This swapping of stop and start is to maintain compatibility with
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the range builtin.*/
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/* This swapping of stop and start is to maintain similarity with
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range(). */
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if (stop == NULL) {
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stop = start;
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start = NULL;
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@ -1032,19 +951,10 @@ builtin_long(self, args)
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PyObject *args;
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{
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PyObject *v;
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PyNumberMethods *nb;
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if (!PyArg_ParseTuple(args, "O:long", &v))
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return NULL;
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if (PyString_Check(v))
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return long_from_string(v);
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if ((nb = v->ob_type->tp_as_number) == NULL ||
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nb->nb_long == NULL) {
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PyErr_SetString(PyExc_TypeError,
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"long() argument can't be converted to long");
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return NULL;
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}
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return (*nb->nb_long)(v);
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return PyNumber_Long(v);
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}
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static PyObject *
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@ -1061,7 +971,7 @@ min_max(args, sign)
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else if (!PyArg_ParseTuple(args, "O:min/max", &v))
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return NULL;
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sq = v->ob_type->tp_as_sequence;
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if (sq == NULL) {
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if (sq == NULL || sq->sq_item == NULL) {
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PyErr_SetString(PyExc_TypeError,
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"min() or max() of non-sequence");
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return NULL;
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@ -1165,80 +1075,16 @@ builtin_ord(self, args)
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return PyInt_FromLong((long)(c & 0xff));
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}
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static PyObject *
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do_pow(v, w)
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PyObject *v, *w;
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{
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PyObject *res;
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if (PyInstance_Check(v) || PyInstance_Check(w))
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return PyInstance_DoBinOp(v, w, "__pow__", "__rpow__", do_pow);
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if (v->ob_type->tp_as_number == NULL ||
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w->ob_type->tp_as_number == NULL) {
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PyErr_SetString(PyExc_TypeError,
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"pow() requires numeric arguments");
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return NULL;
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}
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if (
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#ifndef WITHOUT_COMPLEX
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!PyComplex_Check(v) &&
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#endif
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PyFloat_Check(w) && PyFloat_AsDouble(v) < 0.0) {
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if (!PyErr_Occurred())
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PyErr_SetString(PyExc_ValueError,
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"negative number to float power");
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return NULL;
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}
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if (PyNumber_Coerce(&v, &w) != 0)
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return NULL;
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res = (*v->ob_type->tp_as_number->nb_power)(v, w, Py_None);
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Py_DECREF(v);
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Py_DECREF(w);
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return res;
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}
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static PyObject *
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builtin_pow(self, args)
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PyObject *self;
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PyObject *args;
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{
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PyObject *v, *w, *z = Py_None, *res;
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PyObject *v1, *z1, *w2, *z2;
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PyObject *v, *w, *z = Py_None;
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if (!PyArg_ParseTuple(args, "OO|O:pow", &v, &w, &z))
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return NULL;
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if (z == Py_None)
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return do_pow(v, w);
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/* XXX The ternary version doesn't do class instance coercions */
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if (PyInstance_Check(v))
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return v->ob_type->tp_as_number->nb_power(v, w, z);
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if (v->ob_type->tp_as_number == NULL ||
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z->ob_type->tp_as_number == NULL ||
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w->ob_type->tp_as_number == NULL) {
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PyErr_SetString(PyExc_TypeError,
|
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"pow() requires numeric arguments");
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return NULL;
|
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}
|
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if (PyNumber_Coerce(&v, &w) != 0)
|
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return NULL;
|
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res = NULL;
|
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v1 = v;
|
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z1 = z;
|
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if (PyNumber_Coerce(&v1, &z1) != 0)
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goto error2;
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w2 = w;
|
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z2 = z1;
|
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if (PyNumber_Coerce(&w2, &z2) != 0)
|
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goto error1;
|
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res = (*v1->ob_type->tp_as_number->nb_power)(v1, w2, z2);
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Py_DECREF(w2);
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Py_DECREF(z2);
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error1:
|
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Py_DECREF(v1);
|
||||
Py_DECREF(z1);
|
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error2:
|
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Py_DECREF(v);
|
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Py_DECREF(w);
|
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return res;
|
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return PyNumber_Power(v, w, z);
|
||||
}
|
||||
|
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static PyObject *
|
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|
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@ -1401,7 +1247,8 @@ builtin_reduce(self, args)
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if (result != NULL)
|
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Py_INCREF(result);
|
||||
|
||||
if ((sqf = seq->ob_type->tp_as_sequence) == NULL) {
|
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sqf = seq->ob_type->tp_as_sequence;
|
||||
if (sqf == NULL || sqf->sq_item == NULL) {
|
||||
PyErr_SetString(PyExc_TypeError,
|
||||
"2nd argument to reduce() must be a sequence object");
|
||||
return NULL;
|
||||
|
|
@ -1528,57 +1375,7 @@ builtin_tuple(self, args)
|
|||
|
||||
if (!PyArg_ParseTuple(args, "O:tuple", &v))
|
||||
return NULL;
|
||||
if (PyTuple_Check(v)) {
|
||||
Py_INCREF(v);
|
||||
return v;
|
||||
}
|
||||
if (PyList_Check(v))
|
||||
return PyList_AsTuple(v);
|
||||
if (PyString_Check(v)) {
|
||||
int n = PyString_Size(v);
|
||||
PyObject *t = PyTuple_New(n);
|
||||
if (t != NULL) {
|
||||
int i;
|
||||
char *p = PyString_AsString(v);
|
||||
for (i = 0; i < n; i++) {
|
||||
PyObject *item =
|
||||
PyString_FromStringAndSize(p+i, 1);
|
||||
if (item == NULL) {
|
||||
Py_DECREF(t);
|
||||
t = NULL;
|
||||
break;
|
||||
}
|
||||
PyTuple_SetItem(t, i, item);
|
||||
}
|
||||
}
|
||||
return t;
|
||||
}
|
||||
/* Generic sequence object */
|
||||
if ((sqf = v->ob_type->tp_as_sequence) != NULL) {
|
||||
int n = (*sqf->sq_length)(v);
|
||||
int i;
|
||||
PyObject *t;
|
||||
if (n < 0)
|
||||
return NULL;
|
||||
t = PyTuple_New(n);
|
||||
if (t == NULL)
|
||||
return NULL;
|
||||
for (i = 0; i < n; i++) {
|
||||
PyObject *item = (*sqf->sq_item)(v, i);
|
||||
if (item == NULL) {
|
||||
Py_DECREF(t);
|
||||
t = NULL;
|
||||
break;
|
||||
}
|
||||
PyTuple_SetItem(t, i, item);
|
||||
}
|
||||
/* XXX Should support indefinite-length sequences */
|
||||
return t;
|
||||
}
|
||||
/* None of the above */
|
||||
PyErr_SetString(PyExc_TypeError,
|
||||
"tuple() argument must be a sequence");
|
||||
return NULL;
|
||||
return PySequence_Tuple(v);
|
||||
}
|
||||
|
||||
static PyObject *
|
||||
|
|
@ -1815,6 +1612,7 @@ init_class_exc(dict)
|
|||
if (m == NULL ||
|
||||
(d = PyModule_GetDict(m)) == NULL)
|
||||
{
|
||||
/* XXX Should use PySys_WriteStderr here */
|
||||
PyObject *f = PySys_GetObject("stderr");
|
||||
if (Py_VerboseFlag) {
|
||||
PyFile_WriteString(
|
||||
|
|
@ -2093,117 +1891,3 @@ Fail_1:
|
|||
Py_DECREF(result);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Copied with modifications from stropmodule.c: atoi,atof.atol */
|
||||
|
||||
static PyObject *
|
||||
int_from_string(v)
|
||||
PyObject *v;
|
||||
{
|
||||
extern long PyOS_strtol Py_PROTO((const char *, char **, int));
|
||||
char *s, *end;
|
||||
long x;
|
||||
char buffer[256]; /* For errors */
|
||||
|
||||
s = PyString_AS_STRING(v);
|
||||
while (*s && isspace(Py_CHARMASK(*s)))
|
||||
s++;
|
||||
if (s[0] == '\0') {
|
||||
PyErr_SetString(PyExc_ValueError, "empty string for int()");
|
||||
return NULL;
|
||||
}
|
||||
errno = 0;
|
||||
x = PyOS_strtol(s, &end, 10);
|
||||
while (*end && isspace(Py_CHARMASK(*end)))
|
||||
end++;
|
||||
if (*end != '\0') {
|
||||
sprintf(buffer, "invalid literal for int(): %.200s", s);
|
||||
PyErr_SetString(PyExc_ValueError, buffer);
|
||||
return NULL;
|
||||
}
|
||||
else if (end-s != PyString_GET_SIZE(v)) {
|
||||
PyErr_SetString(PyExc_ValueError,
|
||||
"null byte in argument for int()");
|
||||
return NULL;
|
||||
}
|
||||
else if (errno != 0) {
|
||||
sprintf(buffer, "int() literal too large: %.200s", s);
|
||||
PyErr_SetString(PyExc_ValueError, buffer);
|
||||
return NULL;
|
||||
}
|
||||
return PyInt_FromLong(x);
|
||||
}
|
||||
|
||||
static PyObject *
|
||||
long_from_string(v)
|
||||
PyObject *v;
|
||||
{
|
||||
char *s, *end;
|
||||
PyObject *x;
|
||||
char buffer[256]; /* For errors */
|
||||
|
||||
s = PyString_AS_STRING(v);
|
||||
while (*s && isspace(Py_CHARMASK(*s)))
|
||||
s++;
|
||||
if (s[0] == '\0') {
|
||||
PyErr_SetString(PyExc_ValueError, "empty string for long()");
|
||||
return NULL;
|
||||
}
|
||||
x = PyLong_FromString(s, &end, 10);
|
||||
if (x == NULL)
|
||||
return NULL;
|
||||
while (*end && isspace(Py_CHARMASK(*end)))
|
||||
end++;
|
||||
if (*end != '\0') {
|
||||
sprintf(buffer, "invalid literal for long(): %.200s", s);
|
||||
PyErr_SetString(PyExc_ValueError, buffer);
|
||||
Py_DECREF(x);
|
||||
return NULL;
|
||||
}
|
||||
else if (end-s != PyString_GET_SIZE(v)) {
|
||||
PyErr_SetString(PyExc_ValueError,
|
||||
"null byte in argument for float()");
|
||||
return NULL;
|
||||
}
|
||||
return x;
|
||||
}
|
||||
|
||||
static PyObject *
|
||||
float_from_string(v)
|
||||
PyObject *v;
|
||||
{
|
||||
extern double strtod Py_PROTO((const char *, char **));
|
||||
char *s, *end;
|
||||
double x;
|
||||
char buffer[256]; /* For errors */
|
||||
|
||||
s = PyString_AS_STRING(v);
|
||||
while (*s && isspace(Py_CHARMASK(*s)))
|
||||
s++;
|
||||
if (s[0] == '\0') {
|
||||
PyErr_SetString(PyExc_ValueError, "empty string for float()");
|
||||
return NULL;
|
||||
}
|
||||
errno = 0;
|
||||
PyFPE_START_PROTECT("float_from_string", return 0)
|
||||
x = strtod(s, &end);
|
||||
PyFPE_END_PROTECT(x)
|
||||
while (*end && isspace(Py_CHARMASK(*end)))
|
||||
end++;
|
||||
if (*end != '\0') {
|
||||
sprintf(buffer, "invalid literal for float(): %.200s", s);
|
||||
PyErr_SetString(PyExc_ValueError, buffer);
|
||||
return NULL;
|
||||
}
|
||||
else if (end-s != PyString_GET_SIZE(v)) {
|
||||
PyErr_SetString(PyExc_ValueError,
|
||||
"null byte in argument for float()");
|
||||
return NULL;
|
||||
}
|
||||
else if (errno != 0) {
|
||||
sprintf(buffer, "float() literal too large: %.200s", s);
|
||||
PyErr_SetString(PyExc_ValueError, buffer);
|
||||
return NULL;
|
||||
}
|
||||
return PyFloat_FromDouble(x);
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue