diff options
Diffstat (limited to 'Objects/rangeobject.c')
| -rw-r--r-- | Objects/rangeobject.c | 137 |
1 files changed, 91 insertions, 46 deletions
diff --git a/Objects/rangeobject.c b/Objects/rangeobject.c index 26050c1..002f94a 100644 --- a/Objects/rangeobject.c +++ b/Objects/rangeobject.c @@ -8,8 +8,6 @@ typedef struct { long start; long step; long len; - long index; - int used; /* Set to 1 if called by range_getiter */ } rangeobject; PyObject * @@ -45,8 +43,6 @@ PyRange_New(long start, long len, long step, int reps) obj->start = start; obj->len = len; obj->step = step; - obj->index = 0; - obj->used = 0; return (PyObject *) obj; } @@ -90,44 +86,6 @@ range_repr(rangeobject *r) return rtn; } -static PyObject * -range_getiter(rangeobject *r) -{ - rangeobject *obj; - if (r->used == 0 || r->index >= r->len) { - Py_INCREF(r); - r->used = 1; - r->index = 0; - return (PyObject *)r; - } - - obj = PyObject_NEW(rangeobject, &PyRange_Type); - if (obj == NULL) - return NULL; - - obj->start = r->start; - obj->len = r->len; - obj->step = r->step; - obj->index = 0; - obj->used = 1; - return (PyObject *) obj; -} - -static PyObject * -range_next(rangeobject *r) -{ - if (r->index < r->len) - return PyInt_FromLong(r->start + (r->index++) * r->step); - PyErr_SetObject(PyExc_StopIteration, Py_None); - return NULL; -} - -static PyMethodDef range_methods[] = { - {"next", (PyCFunction)range_next, METH_NOARGS, - "it.next() -- get the next value, or raise StopIteration"}, - {NULL, NULL} /* sentinel */ -}; - static PySequenceMethods range_as_sequence = { (inquiry)range_length, /* sq_length */ 0, /* sq_concat */ @@ -136,6 +94,8 @@ static PySequenceMethods range_as_sequence = { 0, /* sq_slice */ }; +staticforward PyObject * range_iter(PyObject *seq); + PyTypeObject PyRange_Type = { PyObject_HEAD_INIT(&PyType_Type) 0, /* Number of items for varobject */ @@ -154,7 +114,7 @@ PyTypeObject PyRange_Type = { 0, /* tp_hash */ 0, /* tp_call */ 0, /* tp_str */ - PyObject_GenericGetAttr, /* tp_getattro */ + 0, /* tp_getattro */ 0, /* tp_setattro */ 0, /* tp_as_buffer */ Py_TPFLAGS_DEFAULT, /* tp_flags */ @@ -163,7 +123,92 @@ PyTypeObject PyRange_Type = { 0, /* tp_clear */ 0, /* tp_richcompare */ 0, /* tp_weaklistoffset */ - (getiterfunc)range_getiter, /* tp_iter */ - (iternextfunc)range_next, /* tp_iternext */ - range_methods, /* tp_methods */ + (getiterfunc)range_iter, /* tp_iter */ +}; + +/*********************** Xrange Iterator **************************/ + +typedef struct { + PyObject_HEAD + long index; + long start; + long step; + long len; +} rangeiterobject; + +PyTypeObject Pyrangeiter_Type; + +PyObject * +range_iter(PyObject *seq) +{ + rangeiterobject *it; + + if (!PyRange_Check(seq)) { + PyErr_BadInternalCall(); + return NULL; + } + it = PyObject_New(rangeiterobject, &Pyrangeiter_Type); + if (it == NULL) + return NULL; + it->index = 0; + it->start = ((rangeobject *)seq)->start; + it->step = ((rangeobject *)seq)->step; + it->len = ((rangeobject *)seq)->len; + return (PyObject *)it; +} + +static PyObject * +rangeiter_getiter(PyObject *it) +{ + Py_INCREF(it); + return it; +} + +static PyObject * +rangeiter_next(rangeiterobject *r) +{ + if (r->index < r->len) + return PyInt_FromLong(r->start + (r->index++) * r->step); + PyErr_SetObject(PyExc_StopIteration, Py_None); + return NULL; +} + +static PyMethodDef rangeiter_methods[] = { + {"next", (PyCFunction)rangeiter_next, METH_NOARGS, + "it.next() -- get the next value, or raise StopIteration"}, + {NULL, NULL} /* sentinel */ }; + +PyTypeObject Pyrangeiter_Type = { + PyObject_HEAD_INIT(&PyType_Type) + 0, /* ob_size */ + "rangeiterator", /* tp_name */ + sizeof(rangeiterobject), /* tp_basicsize */ + 0, /* tp_itemsize */ + /* methods */ + (destructor)PyObject_Del, /* 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, /* tp_flags */ + 0, /* tp_doc */ + 0, /* tp_traverse */ + 0, /* tp_clear */ + 0, /* tp_richcompare */ + 0, /* tp_weaklistoffset */ + (getiterfunc)rangeiter_getiter, /* tp_iter */ + (iternextfunc)rangeiter_next, /* tp_iternext */ + rangeiter_methods, /* tp_methods */ +}; + |