mirror of https://github.com/python/cpython
Adding iterobject.[ch], which were accidentally not added. Sorry\!
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Guido van Rossum
parent
59d1d2b434
commit
05311481d4
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/* Iterators (the basic kind, over a sequence) */
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extern DL_IMPORT(PyTypeObject) PyIter_Type;
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#define PyIter_Check(op) ((op)->ob_type == &PyIter_Type)
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extern DL_IMPORT(PyObject *) PyIter_New(PyObject *);
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extern DL_IMPORT(PyTypeObject) PyCallIter_Type;
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#define PyCallIter_Check(op) ((op)->ob_type == &PyCallIter_Type)
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extern DL_IMPORT(PyObject *) PyCallIter_New(PyObject *, PyObject *);
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/* Iterator objects */
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#include "Python.h"
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typedef struct {
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PyObject_HEAD
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long it_index;
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PyObject *it_seq;
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} iterobject;
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PyObject *
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PyIter_New(PyObject *seq)
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{
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iterobject *it;
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it = PyObject_NEW(iterobject, &PyIter_Type);
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if (it == NULL)
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return NULL;
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it->it_index = 0;
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Py_INCREF(seq);
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it->it_seq = seq;
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return (PyObject *)it;
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}
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static void
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iter_dealloc(iterobject *it)
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{
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Py_DECREF(it->it_seq);
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PyObject_DEL(it);
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}
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static PyObject *
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iter_next(iterobject *it, PyObject *args)
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{
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PyObject *seq = it->it_seq;
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if (PyList_Check(seq)) {
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PyObject *item;
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if (it->it_index >= PyList_GET_SIZE(seq)) {
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PyErr_SetObject(PyExc_StopIteration, Py_None);
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return NULL;
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}
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item = PyList_GET_ITEM(seq, it->it_index);
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it->it_index++;
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Py_INCREF(item);
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return item;
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}
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else {
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PyObject *result = PySequence_GetItem(seq, it->it_index++);
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if (result == NULL &&
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PyErr_ExceptionMatches(PyExc_IndexError))
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PyErr_SetObject(PyExc_StopIteration, Py_None);
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return result;
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}
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}
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static PyObject *
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iter_getiter(PyObject *it)
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{
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Py_INCREF(it);
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return it;
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}
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static PyMethodDef iter_methods[] = {
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{"next", (PyCFunction)iter_next, METH_VARARGS,
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"it.next() -- get the next value, or raise StopIteration"},
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{NULL, NULL} /* sentinel */
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};
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static PyObject *
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iter_getattr(iterobject *it, char *name)
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{
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return Py_FindMethod(iter_methods, (PyObject *)it, name);
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}
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PyTypeObject PyIter_Type = {
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PyObject_HEAD_INIT(&PyType_Type)
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0, /* ob_size */
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"iterator", /* tp_name */
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sizeof(iterobject), /* tp_basicsize */
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0, /* tp_itemsize */
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/* methods */
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(destructor)iter_dealloc, /* tp_dealloc */
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0, /* tp_print */
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(getattrfunc)iter_getattr, /* tp_getattr */
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0, /* tp_setattr */
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0, /* tp_compare */
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0, /* 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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0, /* tp_call */
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0, /* tp_str */
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0, /* tp_getattro */
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0, /* tp_setattro */
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0, /* tp_as_buffer */
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Py_TPFLAGS_DEFAULT, /* tp_flags */
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0, /* tp_doc */
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0, /* tp_traverse */
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0, /* tp_clear */
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0, /* tp_richcompare */
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0, /* tp_weaklistoffset */
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(getiterfunc)iter_getiter, /* tp_iter */
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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 *it_callable;
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PyObject *it_sentinel;
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} calliterobject;
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PyObject *
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PyCallIter_New(PyObject *callable, PyObject *sentinel)
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{
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calliterobject *it;
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it = PyObject_NEW(calliterobject, &PyCallIter_Type);
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if (it == NULL)
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return NULL;
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Py_INCREF(callable);
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it->it_callable = callable;
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Py_INCREF(sentinel);
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it->it_sentinel = sentinel;
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return (PyObject *)it;
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}
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static void
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calliter_dealloc(calliterobject *it)
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{
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Py_DECREF(it->it_callable);
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Py_DECREF(it->it_sentinel);
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PyObject_DEL(it);
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}
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static PyObject *
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calliter_next(calliterobject *it, PyObject *args)
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{
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PyObject *result = PyObject_CallObject(it->it_callable, NULL);
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if (result != NULL) {
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if (PyObject_RichCompareBool(result, it->it_sentinel, Py_EQ)) {
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PyErr_SetObject(PyExc_StopIteration, Py_None);
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Py_DECREF(result);
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result = NULL;
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}
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}
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return result;
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}
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static PyMethodDef calliter_methods[] = {
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{"next", (PyCFunction)calliter_next, METH_VARARGS,
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"it.next() -- get the next value, or raise StopIteration"},
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{NULL, NULL} /* sentinel */
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};
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static PyObject *
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calliter_getattr(calliterobject *it, char *name)
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{
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return Py_FindMethod(calliter_methods, (PyObject *)it, name);
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}
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PyTypeObject PyCallIter_Type = {
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PyObject_HEAD_INIT(&PyType_Type)
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0, /* ob_size */
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"callable-iterator", /* tp_name */
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sizeof(calliterobject), /* tp_basicsize */
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0, /* tp_itemsize */
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/* methods */
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(destructor)calliter_dealloc, /* tp_dealloc */
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0, /* tp_print */
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(getattrfunc)calliter_getattr, /* tp_getattr */
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0, /* tp_setattr */
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0, /* tp_compare */
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0, /* 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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0, /* tp_call */
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0, /* tp_str */
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0, /* tp_getattro */
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0, /* tp_setattro */
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0, /* tp_as_buffer */
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Py_TPFLAGS_DEFAULT, /* tp_flags */
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0, /* tp_doc */
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0, /* tp_traverse */
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0, /* tp_clear */
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0, /* tp_richcompare */
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0, /* tp_weaklistoffset */
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(getiterfunc)iter_getiter, /* tp_iter */
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};
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