mirror of
https://github.com/python/cpython.git
synced 2024-11-28 20:33:54 +08:00
686b14d7ad
Reverted a Py2.3b1 change to iterator in subclasses of list and tuple. They had been changed to use __getitem__ whenever it had been overriden in the subclass. This caused some usabilty and performance problems. Also, it was inconsistent with the rest of python where many container methods access the underlying object directly without first checking for an overridden getter. Users needing a change in iterator behavior should override it directly.
837 lines
18 KiB
C
837 lines
18 KiB
C
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/* Tuple object implementation */
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#include "Python.h"
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/* Speed optimization to avoid frequent malloc/free of small tuples */
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#ifndef MAXSAVESIZE
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#define MAXSAVESIZE 20 /* Largest tuple to save on free list */
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#endif
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#ifndef MAXSAVEDTUPLES
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#define MAXSAVEDTUPLES 2000 /* Maximum number of tuples of each size to save */
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#endif
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#if MAXSAVESIZE > 0
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/* Entries 1 up to MAXSAVESIZE are free lists, entry 0 is the empty
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tuple () of which at most one instance will be allocated.
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*/
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static PyTupleObject *free_tuples[MAXSAVESIZE];
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static int num_free_tuples[MAXSAVESIZE];
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#endif
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#ifdef COUNT_ALLOCS
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int fast_tuple_allocs;
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int tuple_zero_allocs;
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#endif
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PyObject *
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PyTuple_New(register int size)
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{
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register PyTupleObject *op;
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if (size < 0) {
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PyErr_BadInternalCall();
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return NULL;
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}
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#if MAXSAVESIZE > 0
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if (size == 0 && free_tuples[0]) {
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op = free_tuples[0];
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Py_INCREF(op);
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#ifdef COUNT_ALLOCS
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tuple_zero_allocs++;
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#endif
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return (PyObject *) op;
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}
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if (0 < size && size < MAXSAVESIZE &&
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(op = free_tuples[size]) != NULL)
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{
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free_tuples[size] = (PyTupleObject *) op->ob_item[0];
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num_free_tuples[size]--;
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#ifdef COUNT_ALLOCS
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fast_tuple_allocs++;
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#endif
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/* Inline PyObject_InitVar */
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#ifdef Py_TRACE_REFS
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op->ob_size = size;
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op->ob_type = &PyTuple_Type;
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#endif
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_Py_NewReference((PyObject *)op);
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}
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else
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#endif
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{
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int nbytes = size * sizeof(PyObject *);
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/* Check for overflow */
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if (nbytes / sizeof(PyObject *) != (size_t)size ||
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(nbytes += sizeof(PyTupleObject) - sizeof(PyObject *))
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<= 0)
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{
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return PyErr_NoMemory();
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}
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op = PyObject_GC_NewVar(PyTupleObject, &PyTuple_Type, size);
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if (op == NULL)
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return NULL;
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}
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memset(op->ob_item, 0, sizeof(*op->ob_item) * size);
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#if MAXSAVESIZE > 0
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if (size == 0) {
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free_tuples[0] = op;
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++num_free_tuples[0];
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Py_INCREF(op); /* extra INCREF so that this is never freed */
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}
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#endif
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_PyObject_GC_TRACK(op);
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return (PyObject *) op;
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}
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int
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PyTuple_Size(register PyObject *op)
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{
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if (!PyTuple_Check(op)) {
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PyErr_BadInternalCall();
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return -1;
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}
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else
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return ((PyTupleObject *)op)->ob_size;
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}
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PyObject *
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PyTuple_GetItem(register PyObject *op, register int i)
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{
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if (!PyTuple_Check(op)) {
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PyErr_BadInternalCall();
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return NULL;
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}
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if (i < 0 || i >= ((PyTupleObject *)op) -> ob_size) {
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PyErr_SetString(PyExc_IndexError, "tuple index out of range");
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return NULL;
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}
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return ((PyTupleObject *)op) -> ob_item[i];
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}
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int
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PyTuple_SetItem(register PyObject *op, register int i, PyObject *newitem)
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{
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register PyObject *olditem;
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register PyObject **p;
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if (!PyTuple_Check(op) || op->ob_refcnt != 1) {
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Py_XDECREF(newitem);
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PyErr_BadInternalCall();
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return -1;
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}
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if (i < 0 || i >= ((PyTupleObject *)op) -> ob_size) {
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Py_XDECREF(newitem);
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PyErr_SetString(PyExc_IndexError,
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"tuple assignment index out of range");
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return -1;
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}
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p = ((PyTupleObject *)op) -> ob_item + i;
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olditem = *p;
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*p = newitem;
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Py_XDECREF(olditem);
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return 0;
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}
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/* Methods */
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static void
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tupledealloc(register PyTupleObject *op)
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{
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register int i;
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register int len = op->ob_size;
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PyObject_GC_UnTrack(op);
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Py_TRASHCAN_SAFE_BEGIN(op)
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if (len > 0) {
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i = len;
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while (--i >= 0)
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Py_XDECREF(op->ob_item[i]);
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#if MAXSAVESIZE > 0
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if (len < MAXSAVESIZE &&
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num_free_tuples[len] < MAXSAVEDTUPLES &&
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op->ob_type == &PyTuple_Type)
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{
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op->ob_item[0] = (PyObject *) free_tuples[len];
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num_free_tuples[len]++;
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free_tuples[len] = op;
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goto done; /* return */
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}
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#endif
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}
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op->ob_type->tp_free((PyObject *)op);
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done:
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Py_TRASHCAN_SAFE_END(op)
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}
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static int
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tupleprint(PyTupleObject *op, FILE *fp, int flags)
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{
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int i;
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fprintf(fp, "(");
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for (i = 0; i < op->ob_size; i++) {
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if (i > 0)
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fprintf(fp, ", ");
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if (PyObject_Print(op->ob_item[i], fp, 0) != 0)
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return -1;
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}
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if (op->ob_size == 1)
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fprintf(fp, ",");
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fprintf(fp, ")");
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return 0;
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}
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static PyObject *
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tuplerepr(PyTupleObject *v)
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{
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int i, n;
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PyObject *s, *temp;
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PyObject *pieces, *result = NULL;
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n = v->ob_size;
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if (n == 0)
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return PyString_FromString("()");
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pieces = PyTuple_New(n);
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if (pieces == NULL)
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return NULL;
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/* Do repr() on each element. */
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for (i = 0; i < n; ++i) {
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s = PyObject_Repr(v->ob_item[i]);
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if (s == NULL)
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goto Done;
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PyTuple_SET_ITEM(pieces, i, s);
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}
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/* Add "()" decorations to the first and last items. */
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assert(n > 0);
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s = PyString_FromString("(");
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if (s == NULL)
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goto Done;
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temp = PyTuple_GET_ITEM(pieces, 0);
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PyString_ConcatAndDel(&s, temp);
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PyTuple_SET_ITEM(pieces, 0, s);
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if (s == NULL)
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goto Done;
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s = PyString_FromString(n == 1 ? ",)" : ")");
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if (s == NULL)
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goto Done;
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temp = PyTuple_GET_ITEM(pieces, n-1);
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PyString_ConcatAndDel(&temp, s);
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PyTuple_SET_ITEM(pieces, n-1, temp);
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if (temp == NULL)
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goto Done;
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/* Paste them all together with ", " between. */
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s = PyString_FromString(", ");
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if (s == NULL)
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goto Done;
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result = _PyString_Join(s, pieces);
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Py_DECREF(s);
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Done:
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Py_DECREF(pieces);
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return result;
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}
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static long
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tuplehash(PyTupleObject *v)
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{
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register long x, y;
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register int len = v->ob_size;
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register PyObject **p;
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x = 0x345678L;
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p = v->ob_item;
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while (--len >= 0) {
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y = PyObject_Hash(*p++);
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if (y == -1)
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return -1;
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x = (1000003*x) ^ y;
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}
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x ^= v->ob_size;
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if (x == -1)
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x = -2;
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return x;
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}
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static int
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tuplelength(PyTupleObject *a)
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{
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return a->ob_size;
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}
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static int
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tuplecontains(PyTupleObject *a, PyObject *el)
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{
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int i, cmp;
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for (i = 0, cmp = 0 ; cmp == 0 && i < a->ob_size; ++i)
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cmp = PyObject_RichCompareBool(el, PyTuple_GET_ITEM(a, i),
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Py_EQ);
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return cmp;
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}
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static PyObject *
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tupleitem(register PyTupleObject *a, register int i)
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{
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if (i < 0 || i >= a->ob_size) {
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PyErr_SetString(PyExc_IndexError, "tuple index out of range");
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return NULL;
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}
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Py_INCREF(a->ob_item[i]);
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return a->ob_item[i];
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}
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static PyObject *
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tupleslice(register PyTupleObject *a, register int ilow, register int ihigh)
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{
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register PyTupleObject *np;
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register int i;
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if (ilow < 0)
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ilow = 0;
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if (ihigh > a->ob_size)
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ihigh = a->ob_size;
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if (ihigh < ilow)
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ihigh = ilow;
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if (ilow == 0 && ihigh == a->ob_size && PyTuple_CheckExact(a)) {
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Py_INCREF(a);
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return (PyObject *)a;
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}
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np = (PyTupleObject *)PyTuple_New(ihigh - ilow);
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if (np == NULL)
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return NULL;
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for (i = ilow; i < ihigh; i++) {
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PyObject *v = a->ob_item[i];
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Py_INCREF(v);
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np->ob_item[i - ilow] = v;
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}
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return (PyObject *)np;
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}
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PyObject *
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PyTuple_GetSlice(PyObject *op, int i, int j)
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{
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if (op == NULL || !PyTuple_Check(op)) {
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PyErr_BadInternalCall();
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return NULL;
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}
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return tupleslice((PyTupleObject *)op, i, j);
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}
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static PyObject *
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tupleconcat(register PyTupleObject *a, register PyObject *bb)
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{
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register int size;
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register int i;
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PyTupleObject *np;
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if (!PyTuple_Check(bb)) {
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PyErr_Format(PyExc_TypeError,
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"can only concatenate tuple (not \"%.200s\") to tuple",
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bb->ob_type->tp_name);
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return NULL;
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}
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#define b ((PyTupleObject *)bb)
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size = a->ob_size + b->ob_size;
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if (size < 0)
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return PyErr_NoMemory();
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np = (PyTupleObject *) PyTuple_New(size);
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if (np == NULL) {
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return NULL;
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}
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for (i = 0; i < a->ob_size; i++) {
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PyObject *v = a->ob_item[i];
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Py_INCREF(v);
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np->ob_item[i] = v;
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}
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for (i = 0; i < b->ob_size; i++) {
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PyObject *v = b->ob_item[i];
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Py_INCREF(v);
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np->ob_item[i + a->ob_size] = v;
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}
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return (PyObject *)np;
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#undef b
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}
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static PyObject *
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tuplerepeat(PyTupleObject *a, int n)
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{
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int i, j;
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int size;
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PyTupleObject *np;
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PyObject **p;
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if (n < 0)
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n = 0;
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if (a->ob_size == 0 || n == 1) {
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if (PyTuple_CheckExact(a)) {
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/* Since tuples are immutable, we can return a shared
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copy in this case */
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Py_INCREF(a);
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return (PyObject *)a;
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}
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if (a->ob_size == 0)
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return PyTuple_New(0);
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}
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size = a->ob_size * n;
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if (size/a->ob_size != n)
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return PyErr_NoMemory();
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np = (PyTupleObject *) PyTuple_New(size);
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if (np == NULL)
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return NULL;
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p = np->ob_item;
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for (i = 0; i < n; i++) {
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for (j = 0; j < a->ob_size; j++) {
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*p = a->ob_item[j];
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Py_INCREF(*p);
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p++;
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}
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}
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return (PyObject *) np;
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}
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static int
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tupletraverse(PyTupleObject *o, visitproc visit, void *arg)
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{
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int i, err;
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PyObject *x;
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for (i = o->ob_size; --i >= 0; ) {
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x = o->ob_item[i];
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if (x != NULL) {
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err = visit(x, arg);
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if (err)
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return err;
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}
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}
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return 0;
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}
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|
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static PyObject *
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tuplerichcompare(PyObject *v, PyObject *w, int op)
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{
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PyTupleObject *vt, *wt;
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int i;
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int vlen, wlen;
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if (!PyTuple_Check(v) || !PyTuple_Check(w)) {
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Py_INCREF(Py_NotImplemented);
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return Py_NotImplemented;
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}
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vt = (PyTupleObject *)v;
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wt = (PyTupleObject *)w;
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vlen = vt->ob_size;
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wlen = wt->ob_size;
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|
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/* Note: the corresponding code for lists has an "early out" test
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* here when op is EQ or NE and the lengths differ. That pays there,
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* but Tim was unable to find any real code where EQ/NE tuple
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* compares don't have the same length, so testing for it here would
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* have cost without benefit.
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*/
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/* Search for the first index where items are different.
|
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* Note that because tuples are immutable, it's safe to reuse
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* vlen and wlen across the comparison calls.
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*/
|
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for (i = 0; i < vlen && i < wlen; i++) {
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int k = PyObject_RichCompareBool(vt->ob_item[i],
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wt->ob_item[i], Py_EQ);
|
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if (k < 0)
|
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return NULL;
|
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if (!k)
|
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break;
|
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}
|
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|
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if (i >= vlen || i >= wlen) {
|
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/* No more items to compare -- compare sizes */
|
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int cmp;
|
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PyObject *res;
|
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switch (op) {
|
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case Py_LT: cmp = vlen < wlen; break;
|
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case Py_LE: cmp = vlen <= wlen; break;
|
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case Py_EQ: cmp = vlen == wlen; break;
|
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case Py_NE: cmp = vlen != wlen; break;
|
|
case Py_GT: cmp = vlen > wlen; break;
|
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case Py_GE: cmp = vlen >= wlen; break;
|
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default: return NULL; /* cannot happen */
|
|
}
|
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if (cmp)
|
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res = Py_True;
|
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else
|
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res = Py_False;
|
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Py_INCREF(res);
|
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return res;
|
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}
|
|
|
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/* We have an item that differs -- shortcuts for EQ/NE */
|
|
if (op == Py_EQ) {
|
|
Py_INCREF(Py_False);
|
|
return Py_False;
|
|
}
|
|
if (op == Py_NE) {
|
|
Py_INCREF(Py_True);
|
|
return Py_True;
|
|
}
|
|
|
|
/* Compare the final item again using the proper operator */
|
|
return PyObject_RichCompare(vt->ob_item[i], wt->ob_item[i], op);
|
|
}
|
|
|
|
static PyObject *
|
|
tuple_subtype_new(PyTypeObject *type, PyObject *args, PyObject *kwds);
|
|
|
|
static PyObject *
|
|
tuple_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
|
|
{
|
|
PyObject *arg = NULL;
|
|
static char *kwlist[] = {"sequence", 0};
|
|
|
|
if (type != &PyTuple_Type)
|
|
return tuple_subtype_new(type, args, kwds);
|
|
if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:tuple", kwlist, &arg))
|
|
return NULL;
|
|
|
|
if (arg == NULL)
|
|
return PyTuple_New(0);
|
|
else
|
|
return PySequence_Tuple(arg);
|
|
}
|
|
|
|
static PyObject *
|
|
tuple_subtype_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
|
|
{
|
|
PyObject *tmp, *new, *item;
|
|
int i, n;
|
|
|
|
assert(PyType_IsSubtype(type, &PyTuple_Type));
|
|
tmp = tuple_new(&PyTuple_Type, args, kwds);
|
|
if (tmp == NULL)
|
|
return NULL;
|
|
assert(PyTuple_Check(tmp));
|
|
new = type->tp_alloc(type, n = PyTuple_GET_SIZE(tmp));
|
|
if (new == NULL)
|
|
return NULL;
|
|
for (i = 0; i < n; i++) {
|
|
item = PyTuple_GET_ITEM(tmp, i);
|
|
Py_INCREF(item);
|
|
PyTuple_SET_ITEM(new, i, item);
|
|
}
|
|
Py_DECREF(tmp);
|
|
return new;
|
|
}
|
|
|
|
PyDoc_STRVAR(tuple_doc,
|
|
"tuple() -> an empty tuple\n"
|
|
"tuple(sequence) -> tuple initialized from sequence's items\n"
|
|
"\n"
|
|
"If the argument is a tuple, the return value is the same object.");
|
|
|
|
static PySequenceMethods tuple_as_sequence = {
|
|
(inquiry)tuplelength, /* sq_length */
|
|
(binaryfunc)tupleconcat, /* sq_concat */
|
|
(intargfunc)tuplerepeat, /* sq_repeat */
|
|
(intargfunc)tupleitem, /* sq_item */
|
|
(intintargfunc)tupleslice, /* sq_slice */
|
|
0, /* sq_ass_item */
|
|
0, /* sq_ass_slice */
|
|
(objobjproc)tuplecontains, /* sq_contains */
|
|
};
|
|
|
|
static PyObject*
|
|
tuplesubscript(PyTupleObject* self, PyObject* item)
|
|
{
|
|
if (PyInt_Check(item)) {
|
|
long i = PyInt_AS_LONG(item);
|
|
if (i < 0)
|
|
i += PyTuple_GET_SIZE(self);
|
|
return tupleitem(self, i);
|
|
}
|
|
else if (PyLong_Check(item)) {
|
|
long i = PyLong_AsLong(item);
|
|
if (i == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
if (i < 0)
|
|
i += PyTuple_GET_SIZE(self);
|
|
return tupleitem(self, i);
|
|
}
|
|
else if (PySlice_Check(item)) {
|
|
int start, stop, step, slicelength, cur, i;
|
|
PyObject* result;
|
|
PyObject* it;
|
|
|
|
if (PySlice_GetIndicesEx((PySliceObject*)item,
|
|
PyTuple_GET_SIZE(self),
|
|
&start, &stop, &step, &slicelength) < 0) {
|
|
return NULL;
|
|
}
|
|
|
|
if (slicelength <= 0) {
|
|
return PyTuple_New(0);
|
|
}
|
|
else {
|
|
result = PyTuple_New(slicelength);
|
|
|
|
for (cur = start, i = 0; i < slicelength;
|
|
cur += step, i++) {
|
|
it = PyTuple_GET_ITEM(self, cur);
|
|
Py_INCREF(it);
|
|
PyTuple_SET_ITEM(result, i, it);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
}
|
|
else {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"tuple indices must be integers");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static PyObject *
|
|
tuple_getnewargs(PyTupleObject *v)
|
|
{
|
|
return Py_BuildValue("(N)", tupleslice(v, 0, v->ob_size));
|
|
|
|
}
|
|
|
|
static PyMethodDef tuple_methods[] = {
|
|
{"__getnewargs__", (PyCFunction)tuple_getnewargs, METH_NOARGS},
|
|
{NULL, NULL} /* sentinel */
|
|
};
|
|
|
|
static PyMappingMethods tuple_as_mapping = {
|
|
(inquiry)tuplelength,
|
|
(binaryfunc)tuplesubscript,
|
|
0
|
|
};
|
|
|
|
static PyObject *tuple_iter(PyObject *seq);
|
|
|
|
PyTypeObject PyTuple_Type = {
|
|
PyObject_HEAD_INIT(&PyType_Type)
|
|
0,
|
|
"tuple",
|
|
sizeof(PyTupleObject) - sizeof(PyObject *),
|
|
sizeof(PyObject *),
|
|
(destructor)tupledealloc, /* tp_dealloc */
|
|
(printfunc)tupleprint, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_compare */
|
|
(reprfunc)tuplerepr, /* tp_repr */
|
|
0, /* tp_as_number */
|
|
&tuple_as_sequence, /* tp_as_sequence */
|
|
&tuple_as_mapping, /* tp_as_mapping */
|
|
(hashfunc)tuplehash, /* 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 */
|
|
tuple_doc, /* tp_doc */
|
|
(traverseproc)tupletraverse, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
tuplerichcompare, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
tuple_iter, /* tp_iter */
|
|
0, /* tp_iternext */
|
|
tuple_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 */
|
|
0, /* tp_alloc */
|
|
tuple_new, /* tp_new */
|
|
PyObject_GC_Del, /* tp_free */
|
|
};
|
|
|
|
/* The following function breaks the notion that tuples are immutable:
|
|
it changes the size of a tuple. We get away with this only if there
|
|
is only one module referencing the object. You can also think of it
|
|
as creating a new tuple object and destroying the old one, only more
|
|
efficiently. In any case, don't use this if the tuple may already be
|
|
known to some other part of the code. */
|
|
|
|
int
|
|
_PyTuple_Resize(PyObject **pv, int newsize)
|
|
{
|
|
register PyTupleObject *v;
|
|
register PyTupleObject *sv;
|
|
int i;
|
|
int oldsize;
|
|
|
|
v = (PyTupleObject *) *pv;
|
|
if (v == NULL || v->ob_type != &PyTuple_Type ||
|
|
(v->ob_size != 0 && v->ob_refcnt != 1)) {
|
|
*pv = 0;
|
|
Py_XDECREF(v);
|
|
PyErr_BadInternalCall();
|
|
return -1;
|
|
}
|
|
oldsize = v->ob_size;
|
|
if (oldsize == newsize)
|
|
return 0;
|
|
|
|
if (oldsize == 0) {
|
|
/* Empty tuples are often shared, so we should never
|
|
resize them in-place even if we do own the only
|
|
(current) reference */
|
|
Py_DECREF(v);
|
|
*pv = PyTuple_New(newsize);
|
|
return *pv == NULL ? -1 : 0;
|
|
}
|
|
|
|
/* XXX UNREF/NEWREF interface should be more symmetrical */
|
|
_Py_DEC_REFTOTAL;
|
|
_PyObject_GC_UNTRACK(v);
|
|
_Py_ForgetReference((PyObject *) v);
|
|
/* DECREF items deleted by shrinkage */
|
|
for (i = newsize; i < oldsize; i++) {
|
|
Py_XDECREF(v->ob_item[i]);
|
|
v->ob_item[i] = NULL;
|
|
}
|
|
sv = PyObject_GC_Resize(PyTupleObject, v, newsize);
|
|
if (sv == NULL) {
|
|
*pv = NULL;
|
|
PyObject_GC_Del(v);
|
|
return -1;
|
|
}
|
|
_Py_NewReference((PyObject *) sv);
|
|
/* Zero out items added by growing */
|
|
if (newsize > oldsize)
|
|
memset(&sv->ob_item[oldsize], 0,
|
|
sizeof(*sv->ob_item) * (newsize - oldsize));
|
|
*pv = (PyObject *) sv;
|
|
_PyObject_GC_TRACK(sv);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
PyTuple_Fini(void)
|
|
{
|
|
#if MAXSAVESIZE > 0
|
|
int i;
|
|
|
|
Py_XDECREF(free_tuples[0]);
|
|
free_tuples[0] = NULL;
|
|
|
|
for (i = 1; i < MAXSAVESIZE; i++) {
|
|
PyTupleObject *p, *q;
|
|
p = free_tuples[i];
|
|
free_tuples[i] = NULL;
|
|
while (p) {
|
|
q = p;
|
|
p = (PyTupleObject *)(p->ob_item[0]);
|
|
PyObject_GC_Del(q);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*********************** Tuple Iterator **************************/
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
long it_index;
|
|
PyTupleObject *it_seq; /* Set to NULL when iterator is exhausted */
|
|
} tupleiterobject;
|
|
|
|
PyTypeObject PyTupleIter_Type;
|
|
|
|
static PyObject *
|
|
tuple_iter(PyObject *seq)
|
|
{
|
|
tupleiterobject *it;
|
|
|
|
if (!PyTuple_Check(seq)) {
|
|
PyErr_BadInternalCall();
|
|
return NULL;
|
|
}
|
|
it = PyObject_GC_New(tupleiterobject, &PyTupleIter_Type);
|
|
if (it == NULL)
|
|
return NULL;
|
|
it->it_index = 0;
|
|
Py_INCREF(seq);
|
|
it->it_seq = (PyTupleObject *)seq;
|
|
_PyObject_GC_TRACK(it);
|
|
return (PyObject *)it;
|
|
}
|
|
|
|
static void
|
|
tupleiter_dealloc(tupleiterobject *it)
|
|
{
|
|
_PyObject_GC_UNTRACK(it);
|
|
Py_XDECREF(it->it_seq);
|
|
PyObject_GC_Del(it);
|
|
}
|
|
|
|
static int
|
|
tupleiter_traverse(tupleiterobject *it, visitproc visit, void *arg)
|
|
{
|
|
if (it->it_seq == NULL)
|
|
return 0;
|
|
return visit((PyObject *)it->it_seq, arg);
|
|
}
|
|
|
|
static PyObject *
|
|
tupleiter_next(tupleiterobject *it)
|
|
{
|
|
PyTupleObject *seq;
|
|
PyObject *item;
|
|
|
|
assert(it != NULL);
|
|
seq = it->it_seq;
|
|
if (seq == NULL)
|
|
return NULL;
|
|
assert(PyTuple_Check(seq));
|
|
|
|
if (it->it_index < PyTuple_GET_SIZE(seq)) {
|
|
item = PyTuple_GET_ITEM(seq, it->it_index);
|
|
++it->it_index;
|
|
Py_INCREF(item);
|
|
return item;
|
|
}
|
|
|
|
Py_DECREF(seq);
|
|
it->it_seq = NULL;
|
|
return NULL;
|
|
}
|
|
|
|
PyTypeObject PyTupleIter_Type = {
|
|
PyObject_HEAD_INIT(&PyType_Type)
|
|
0, /* ob_size */
|
|
"tupleiterator", /* tp_name */
|
|
sizeof(tupleiterobject), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
/* methods */
|
|
(destructor)tupleiter_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,/* tp_flags */
|
|
0, /* tp_doc */
|
|
(traverseproc)tupleiter_traverse, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
PyObject_SelfIter, /* tp_iter */
|
|
(iternextfunc)tupleiter_next, /* tp_iternext */
|
|
};
|