diff options
Diffstat (limited to 'AppPkg/Applications/Python/Python-2.7.10/Objects/enumobject.c')
| -rw-r--r-- | AppPkg/Applications/Python/Python-2.7.10/Objects/enumobject.c | 381 |
1 files changed, 381 insertions, 0 deletions
diff --git a/AppPkg/Applications/Python/Python-2.7.10/Objects/enumobject.c b/AppPkg/Applications/Python/Python-2.7.10/Objects/enumobject.c new file mode 100644 index 0000000000..9b6de23ab1 --- /dev/null +++ b/AppPkg/Applications/Python/Python-2.7.10/Objects/enumobject.c @@ -0,0 +1,381 @@ +/* enumerate object */
+
+#include "Python.h"
+
+typedef struct {
+ PyObject_HEAD
+ Py_ssize_t en_index; /* current index of enumeration */
+ PyObject* en_sit; /* secondary iterator of enumeration */
+ PyObject* en_result; /* result tuple */
+ PyObject* en_longindex; /* index for sequences >= PY_SSIZE_T_MAX */
+} enumobject;
+
+static PyObject *
+enum_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+ enumobject *en;
+ PyObject *seq = NULL;
+ PyObject *start = NULL;
+ static char *kwlist[] = {"sequence", "start", 0};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|O:enumerate", kwlist,
+ &seq, &start))
+ return NULL;
+
+ en = (enumobject *)type->tp_alloc(type, 0);
+ if (en == NULL)
+ return NULL;
+ if (start != NULL) {
+ start = PyNumber_Index(start);
+ if (start == NULL) {
+ Py_DECREF(en);
+ return NULL;
+ }
+ assert(PyInt_Check(start) || PyLong_Check(start));
+ en->en_index = PyInt_AsSsize_t(start);
+ if (en->en_index == -1 && PyErr_Occurred()) {
+ PyErr_Clear();
+ en->en_index = PY_SSIZE_T_MAX;
+ en->en_longindex = start;
+ } else {
+ en->en_longindex = NULL;
+ Py_DECREF(start);
+ }
+ } else {
+ en->en_index = 0;
+ en->en_longindex = NULL;
+ }
+ en->en_sit = PyObject_GetIter(seq);
+ if (en->en_sit == NULL) {
+ Py_DECREF(en);
+ return NULL;
+ }
+ en->en_result = PyTuple_Pack(2, Py_None, Py_None);
+ if (en->en_result == NULL) {
+ Py_DECREF(en);
+ return NULL;
+ }
+ return (PyObject *)en;
+}
+
+static void
+enum_dealloc(enumobject *en)
+{
+ PyObject_GC_UnTrack(en);
+ Py_XDECREF(en->en_sit);
+ Py_XDECREF(en->en_result);
+ Py_XDECREF(en->en_longindex);
+ Py_TYPE(en)->tp_free(en);
+}
+
+static int
+enum_traverse(enumobject *en, visitproc visit, void *arg)
+{
+ Py_VISIT(en->en_sit);
+ Py_VISIT(en->en_result);
+ Py_VISIT(en->en_longindex);
+ return 0;
+}
+
+static PyObject *
+enum_next_long(enumobject *en, PyObject* next_item)
+{
+ static PyObject *one = NULL;
+ PyObject *result = en->en_result;
+ PyObject *next_index;
+ PyObject *stepped_up;
+
+ if (en->en_longindex == NULL) {
+ en->en_longindex = PyInt_FromSsize_t(PY_SSIZE_T_MAX);
+ if (en->en_longindex == NULL)
+ return NULL;
+ }
+ if (one == NULL) {
+ one = PyInt_FromLong(1);
+ if (one == NULL)
+ return NULL;
+ }
+ next_index = en->en_longindex;
+ assert(next_index != NULL);
+ stepped_up = PyNumber_Add(next_index, one);
+ if (stepped_up == NULL)
+ return NULL;
+ en->en_longindex = stepped_up;
+
+ if (result->ob_refcnt == 1) {
+ Py_INCREF(result);
+ Py_DECREF(PyTuple_GET_ITEM(result, 0));
+ Py_DECREF(PyTuple_GET_ITEM(result, 1));
+ } else {
+ result = PyTuple_New(2);
+ if (result == NULL) {
+ Py_DECREF(next_index);
+ Py_DECREF(next_item);
+ return NULL;
+ }
+ }
+ PyTuple_SET_ITEM(result, 0, next_index);
+ PyTuple_SET_ITEM(result, 1, next_item);
+ return result;
+}
+
+static PyObject *
+enum_next(enumobject *en)
+{
+ PyObject *next_index;
+ PyObject *next_item;
+ PyObject *result = en->en_result;
+ PyObject *it = en->en_sit;
+
+ next_item = (*Py_TYPE(it)->tp_iternext)(it);
+ if (next_item == NULL)
+ return NULL;
+
+ if (en->en_index == PY_SSIZE_T_MAX)
+ return enum_next_long(en, next_item);
+
+ next_index = PyInt_FromSsize_t(en->en_index);
+ if (next_index == NULL) {
+ Py_DECREF(next_item);
+ return NULL;
+ }
+ en->en_index++;
+
+ if (result->ob_refcnt == 1) {
+ Py_INCREF(result);
+ Py_DECREF(PyTuple_GET_ITEM(result, 0));
+ Py_DECREF(PyTuple_GET_ITEM(result, 1));
+ } else {
+ result = PyTuple_New(2);
+ if (result == NULL) {
+ Py_DECREF(next_index);
+ Py_DECREF(next_item);
+ return NULL;
+ }
+ }
+ PyTuple_SET_ITEM(result, 0, next_index);
+ PyTuple_SET_ITEM(result, 1, next_item);
+ return result;
+}
+
+PyDoc_STRVAR(enum_doc,
+"enumerate(iterable[, start]) -> iterator for index, value of iterable\n"
+"\n"
+"Return an enumerate object. iterable must be another object that supports\n"
+"iteration. The enumerate object yields pairs containing a count (from\n"
+"start, which defaults to zero) and a value yielded by the iterable argument.\n"
+"enumerate is useful for obtaining an indexed list:\n"
+" (0, seq[0]), (1, seq[1]), (2, seq[2]), ...");
+
+PyTypeObject PyEnum_Type = {
+ PyVarObject_HEAD_INIT(&PyType_Type, 0)
+ "enumerate", /* tp_name */
+ sizeof(enumobject), /* tp_basicsize */
+ 0, /* tp_itemsize */
+ /* methods */
+ (destructor)enum_dealloc, /* 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 | Py_TPFLAGS_HAVE_GC |
+ Py_TPFLAGS_BASETYPE, /* tp_flags */
+ enum_doc, /* tp_doc */
+ (traverseproc)enum_traverse, /* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ PyObject_SelfIter, /* tp_iter */
+ (iternextfunc)enum_next, /* tp_iternext */
+ 0, /* tp_methods */
+ 0, /* tp_members */
+ 0, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+ 0, /* tp_init */
+ PyType_GenericAlloc, /* tp_alloc */
+ enum_new, /* tp_new */
+ PyObject_GC_Del, /* tp_free */
+};
+
+/* Reversed Object ***************************************************************/
+
+typedef struct {
+ PyObject_HEAD
+ Py_ssize_t index;
+ PyObject* seq;
+} reversedobject;
+
+static PyObject *
+reversed_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+ Py_ssize_t n;
+ PyObject *seq, *reversed_meth;
+ static PyObject *reversed_cache = NULL;
+ reversedobject *ro;
+
+ if (type == &PyReversed_Type && !_PyArg_NoKeywords("reversed()", kwds))
+ return NULL;
+
+ if (!PyArg_UnpackTuple(args, "reversed", 1, 1, &seq) )
+ return NULL;
+
+ if (PyInstance_Check(seq)) {
+ reversed_meth = PyObject_GetAttrString(seq, "__reversed__");
+ if (reversed_meth == NULL) {
+ if (PyErr_ExceptionMatches(PyExc_AttributeError))
+ PyErr_Clear();
+ else
+ return NULL;
+ }
+ }
+ else {
+ reversed_meth = _PyObject_LookupSpecial(seq, "__reversed__",
+ &reversed_cache);
+ if (reversed_meth == NULL && PyErr_Occurred())
+ return NULL;
+ }
+ if (reversed_meth != NULL) {
+ PyObject *res = PyObject_CallFunctionObjArgs(reversed_meth, NULL);
+ Py_DECREF(reversed_meth);
+ return res;
+ }
+
+ if (!PySequence_Check(seq)) {
+ PyErr_SetString(PyExc_TypeError,
+ "argument to reversed() must be a sequence");
+ return NULL;
+ }
+
+ n = PySequence_Size(seq);
+ if (n == -1)
+ return NULL;
+
+ ro = (reversedobject *)type->tp_alloc(type, 0);
+ if (ro == NULL)
+ return NULL;
+
+ ro->index = n-1;
+ Py_INCREF(seq);
+ ro->seq = seq;
+ return (PyObject *)ro;
+}
+
+static void
+reversed_dealloc(reversedobject *ro)
+{
+ PyObject_GC_UnTrack(ro);
+ Py_XDECREF(ro->seq);
+ Py_TYPE(ro)->tp_free(ro);
+}
+
+static int
+reversed_traverse(reversedobject *ro, visitproc visit, void *arg)
+{
+ Py_VISIT(ro->seq);
+ return 0;
+}
+
+static PyObject *
+reversed_next(reversedobject *ro)
+{
+ PyObject *item;
+ Py_ssize_t index = ro->index;
+
+ if (index >= 0) {
+ item = PySequence_GetItem(ro->seq, index);
+ if (item != NULL) {
+ ro->index--;
+ return item;
+ }
+ if (PyErr_ExceptionMatches(PyExc_IndexError) ||
+ PyErr_ExceptionMatches(PyExc_StopIteration))
+ PyErr_Clear();
+ }
+ ro->index = -1;
+ Py_CLEAR(ro->seq);
+ return NULL;
+}
+
+PyDoc_STRVAR(reversed_doc,
+"reversed(sequence) -> reverse iterator over values of the sequence\n"
+"\n"
+"Return a reverse iterator");
+
+static PyObject *
+reversed_len(reversedobject *ro)
+{
+ Py_ssize_t position, seqsize;
+
+ if (ro->seq == NULL)
+ return PyInt_FromLong(0);
+ seqsize = PySequence_Size(ro->seq);
+ if (seqsize == -1)
+ return NULL;
+ position = ro->index + 1;
+ return PyInt_FromSsize_t((seqsize < position) ? 0 : position);
+}
+
+PyDoc_STRVAR(length_hint_doc, "Private method returning an estimate of len(list(it)).");
+
+static PyMethodDef reversediter_methods[] = {
+ {"__length_hint__", (PyCFunction)reversed_len, METH_NOARGS, length_hint_doc},
+ {NULL, NULL} /* sentinel */
+};
+
+PyTypeObject PyReversed_Type = {
+ PyVarObject_HEAD_INIT(&PyType_Type, 0)
+ "reversed", /* tp_name */
+ sizeof(reversedobject), /* tp_basicsize */
+ 0, /* tp_itemsize */
+ /* methods */
+ (destructor)reversed_dealloc, /* 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 | Py_TPFLAGS_HAVE_GC |
+ Py_TPFLAGS_BASETYPE, /* tp_flags */
+ reversed_doc, /* tp_doc */
+ (traverseproc)reversed_traverse,/* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ PyObject_SelfIter, /* tp_iter */
+ (iternextfunc)reversed_next, /* tp_iternext */
+ reversediter_methods, /* tp_methods */
+ 0, /* tp_members */
+ 0, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+ 0, /* tp_init */
+ PyType_GenericAlloc, /* tp_alloc */
+ reversed_new, /* tp_new */
+ PyObject_GC_Del, /* tp_free */
+};
|