Mercurial > cpython-lru_cache-weakref

annotate Objects/enumobject.c @ 64289:325d016c19f7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
#9689: add links from overview to in-depth class API descriptions.
author Georg Brandl <georg@python.org>
date Thu, 26 Aug 2010 14:30:15 +0000
parents 504c499e8c95
children 7d96679c5d46
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
23285
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
1 /* enumerate object */
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
2
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
3 #include "Python.h"
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
4
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
5 typedef struct {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
6 PyObject_HEAD
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
7 Py_ssize_t en_index; /* current index of enumeration */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
8 PyObject* en_sit; /* secondary iterator of enumeration */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
9 PyObject* en_result; /* result tuple */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
10 PyObject* en_longindex; /* index for sequences >= PY_SSIZE_T_MAX */
23285
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
11 } enumobject;
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
12
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
13 static PyObject *
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
14 enum_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
15 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
16 enumobject *en;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
17 PyObject *seq = NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
18 PyObject *start = NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
19 static char *kwlist[] = {"iterable", "start", 0};
23285
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
20
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
21 if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|O:enumerate", kwlist,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
22 &seq, &start))
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
23 return NULL;
23285
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
24
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
25 en = (enumobject *)type->tp_alloc(type, 0);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
26 if (en == NULL)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
27 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
28 if (start != NULL) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
29 start = PyNumber_Index(start);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
30 if (start == NULL) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
31 Py_DECREF(en);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
32 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
33 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
34 assert(PyLong_Check(start));
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
35 en->en_index = PyLong_AsSsize_t(start);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
36 if (en->en_index == -1 && PyErr_Occurred()) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
37 PyErr_Clear();
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
38 en->en_index = PY_SSIZE_T_MAX;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
39 en->en_longindex = start;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
40 } else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
41 en->en_longindex = NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
42 Py_DECREF(start);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
43 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
44 } else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
45 en->en_index = 0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
46 en->en_longindex = NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
47 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
48 en->en_sit = PyObject_GetIter(seq);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
49 if (en->en_sit == NULL) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
50 Py_DECREF(en);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
51 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
52 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
53 en->en_result = PyTuple_Pack(2, Py_None, Py_None);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
54 if (en->en_result == NULL) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
55 Py_DECREF(en);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
56 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
57 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
58 return (PyObject *)en;
23285
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
59 }
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
60
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
61 static void
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
62 enum_dealloc(enumobject *en)
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
63 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
64 PyObject_GC_UnTrack(en);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
65 Py_XDECREF(en->en_sit);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
66 Py_XDECREF(en->en_result);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
67 Py_XDECREF(en->en_longindex);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
68 Py_TYPE(en)->tp_free(en);
23285
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
69 }
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
70
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
71 static int
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
72 enum_traverse(enumobject *en, visitproc visit, void *arg)
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
73 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
74 Py_VISIT(en->en_sit);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
75 Py_VISIT(en->en_result);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
76 Py_VISIT(en->en_longindex);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
77 return 0;
23285
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
78 }
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
79
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
80 static PyObject *
43734
3e5edf19d5f0 Merged revisions 58221-58741 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
81 enum_next_long(enumobject *en, PyObject* next_item)
3e5edf19d5f0 Merged revisions 58221-58741 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
82 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
83 static PyObject *one = NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
84 PyObject *result = en->en_result;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
85 PyObject *next_index;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
86 PyObject *stepped_up;
43734
3e5edf19d5f0 Merged revisions 58221-58741 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
87
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
88 if (en->en_longindex == NULL) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
89 en->en_longindex = PyLong_FromSsize_t(PY_SSIZE_T_MAX);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
90 if (en->en_longindex == NULL)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
91 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
92 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
93 if (one == NULL) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
94 one = PyLong_FromLong(1);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
95 if (one == NULL)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
96 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
97 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
98 next_index = en->en_longindex;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
99 assert(next_index != NULL);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
100 stepped_up = PyNumber_Add(next_index, one);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
101 if (stepped_up == NULL)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
102 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
103 en->en_longindex = stepped_up;
43734
3e5edf19d5f0 Merged revisions 58221-58741 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
104
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
105 if (result->ob_refcnt == 1) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
106 Py_INCREF(result);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
107 Py_DECREF(PyTuple_GET_ITEM(result, 0));
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
108 Py_DECREF(PyTuple_GET_ITEM(result, 1));
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
109 } else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
110 result = PyTuple_New(2);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
111 if (result == NULL) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
112 Py_DECREF(next_index);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
113 Py_DECREF(next_item);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
114 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
115 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
116 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
117 PyTuple_SET_ITEM(result, 0, next_index);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
118 PyTuple_SET_ITEM(result, 1, next_item);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
119 return result;
43734
3e5edf19d5f0 Merged revisions 58221-58741 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
120 }
3e5edf19d5f0 Merged revisions 58221-58741 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
121
3e5edf19d5f0 Merged revisions 58221-58741 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
122 static PyObject *
23285
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
123 enum_next(enumobject *en)
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
124 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
125 PyObject *next_index;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
126 PyObject *next_item;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
127 PyObject *result = en->en_result;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
128 PyObject *it = en->en_sit;
23285
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
129
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
130 next_item = (*Py_TYPE(it)->tp_iternext)(it);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
131 if (next_item == NULL)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
132 return NULL;
24261
27e94cacb43b Remove the next() method -- one is supplied automatically by
Guido van Rossum <guido@python.org>
parents: 23832
diff changeset
133
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
134 if (en->en_index == PY_SSIZE_T_MAX)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
135 return enum_next_long(en, next_item);
43734
3e5edf19d5f0 Merged revisions 58221-58741 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
136
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
137 next_index = PyLong_FromSsize_t(en->en_index);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
138 if (next_index == NULL) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
139 Py_DECREF(next_item);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
140 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
141 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
142 en->en_index++;
29289
811ad5f2f701 * Beefed-up tests
Raymond Hettinger <python@rcn.com>
parents: 28711
diff changeset
143
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
144 if (result->ob_refcnt == 1) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
145 Py_INCREF(result);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
146 Py_DECREF(PyTuple_GET_ITEM(result, 0));
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
147 Py_DECREF(PyTuple_GET_ITEM(result, 1));
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
148 } else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
149 result = PyTuple_New(2);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
150 if (result == NULL) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
151 Py_DECREF(next_index);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
152 Py_DECREF(next_item);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
153 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
154 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
155 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
156 PyTuple_SET_ITEM(result, 0, next_index);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
157 PyTuple_SET_ITEM(result, 1, next_item);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
158 return result;
23285
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
159 }
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
160
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23285
diff changeset
161 PyDoc_STRVAR(enum_doc,
62566
504c499e8c95 Merged revisions 81465-81466,81468,81679,81735,81760,81868,82183 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents: 61466
diff changeset
162 "enumerate(iterable[, start]) -> iterator for index, value of iterable\n"
28711
820d9570edeb Add a useful docstring to enumerate.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 28320
diff changeset
163 "\n"
56216
a07568c7a82a Merged revisions 75057 via svnmerge from
Ezio Melotti <ezio.melotti@gmail.com>
parents: 54326
diff changeset
164 "Return an enumerate object. iterable must be another object that supports\n"
28711
820d9570edeb Add a useful docstring to enumerate.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 28320
diff changeset
165 "iteration. The enumerate object yields pairs containing a count (from\n"
62566
504c499e8c95 Merged revisions 81465-81466,81468,81679,81735,81760,81868,82183 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents: 61466
diff changeset
166 "start, which defaults to zero) and a value yielded by the iterable argument.\n"
504c499e8c95 Merged revisions 81465-81466,81468,81679,81735,81760,81868,82183 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents: 61466
diff changeset
167 "enumerate is useful for obtaining an indexed list:\n"
504c499e8c95 Merged revisions 81465-81466,81468,81679,81735,81760,81868,82183 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents: 61466
diff changeset
168 " (0, seq[0]), (1, seq[1]), (2, seq[2]), ...");
23285
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
169
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
170 PyTypeObject PyEnum_Type = {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
171 PyVarObject_HEAD_INIT(&PyType_Type, 0)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
172 "enumerate", /* tp_name */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
173 sizeof(enumobject), /* tp_basicsize */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
174 0, /* tp_itemsize */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
175 /* methods */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
176 (destructor)enum_dealloc, /* tp_dealloc */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
177 0, /* tp_print */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
178 0, /* tp_getattr */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
179 0, /* tp_setattr */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
180 0, /* tp_reserved */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
181 0, /* tp_repr */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
182 0, /* tp_as_number */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
183 0, /* tp_as_sequence */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
184 0, /* tp_as_mapping */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
185 0, /* tp_hash */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
186 0, /* tp_call */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
187 0, /* tp_str */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
188 PyObject_GenericGetAttr, /* tp_getattro */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
189 0, /* tp_setattro */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
190 0, /* tp_as_buffer */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
191 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
192 Py_TPFLAGS_BASETYPE, /* tp_flags */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
193 enum_doc, /* tp_doc */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
194 (traverseproc)enum_traverse, /* tp_traverse */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
195 0, /* tp_clear */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
196 0, /* tp_richcompare */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
197 0, /* tp_weaklistoffset */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
198 PyObject_SelfIter, /* tp_iter */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
199 (iternextfunc)enum_next, /* tp_iternext */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
200 0, /* tp_methods */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
201 0, /* tp_members */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
202 0, /* tp_getset */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
203 0, /* tp_base */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
204 0, /* tp_dict */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
205 0, /* tp_descr_get */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
206 0, /* tp_descr_set */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
207 0, /* tp_dictoffset */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
208 0, /* tp_init */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
209 PyType_GenericAlloc, /* tp_alloc */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
210 enum_new, /* tp_new */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
211 PyObject_GC_Del, /* tp_free */
23285
afe263672fd8 - New builtin function enumerate(x), from PEP 279. Example:
Guido van Rossum <guido@python.org>
parents:
diff changeset
212 };
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
213
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
214 /* Reversed Object ***************************************************************/
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
215
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
216 typedef struct {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
217 PyObject_HEAD
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
218 Py_ssize_t index;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
219 PyObject* seq;
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
220 } reversedobject;
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
221
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
222 static PyObject *
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
223 reversed_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
224 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
225 Py_ssize_t n;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
226 PyObject *seq, *reversed_meth;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
227 static PyObject *reversed_cache = NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
228 reversedobject *ro;
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
229
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
230 if (type == &PyReversed_Type && !_PyArg_NoKeywords("reversed()", kwds))
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
231 return NULL;
47109
a02bc2a84d19 Merged revisions 63361-63373,63375,63377-63380 via svnmerge from
Alexandre Vassalotti <alexandre@peadrop.com>
parents: 47097
diff changeset
232
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
233 if (!PyArg_UnpackTuple(args, "reversed", 1, 1, &seq) )
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
234 return NULL;
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
235
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
236 reversed_meth = _PyObject_LookupSpecial(seq, "__reversed__", &reversed_cache);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
237 if (reversed_meth != NULL) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
238 PyObject *res = PyObject_CallFunctionObjArgs(reversed_meth, NULL);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
239 Py_DECREF(reversed_meth);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
240 return res;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
241 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
242 else if (PyErr_Occurred())
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
243 return NULL;
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
244
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
245 if (!PySequence_Check(seq)) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
246 PyErr_SetString(PyExc_TypeError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
247 "argument to reversed() must be a sequence");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
248 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
249 }
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
250
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
251 n = PySequence_Size(seq);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
252 if (n == -1)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
253 return NULL;
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
254
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
255 ro = (reversedobject *)type->tp_alloc(type, 0);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
256 if (ro == NULL)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
257 return NULL;
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
258
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
259 ro->index = n-1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
260 Py_INCREF(seq);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
261 ro->seq = seq;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
262 return (PyObject *)ro;
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
263 }
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
264
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
265 static void
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
266 reversed_dealloc(reversedobject *ro)
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
267 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
268 PyObject_GC_UnTrack(ro);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
269 Py_XDECREF(ro->seq);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
270 Py_TYPE(ro)->tp_free(ro);
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
271 }
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
272
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
273 static int
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
274 reversed_traverse(reversedobject *ro, visitproc visit, void *arg)
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
275 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
276 Py_VISIT(ro->seq);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
277 return 0;
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
278 }
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
279
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
280 static PyObject *
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
281 reversed_next(reversedobject *ro)
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
282 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
283 PyObject *item;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
284 Py_ssize_t index = ro->index;
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
285
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
286 if (index >= 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
287 item = PySequence_GetItem(ro->seq, index);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
288 if (item != NULL) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
289 ro->index--;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
290 return item;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
291 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
292 if (PyErr_ExceptionMatches(PyExc_IndexError) ||
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
293 PyErr_ExceptionMatches(PyExc_StopIteration))
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
294 PyErr_Clear();
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
295 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
296 ro->index = -1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
297 Py_CLEAR(ro->seq);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
298 return NULL;
31502
59538d3b7cd2 Make reversed() transparent with respect to length.
Raymond Hettinger <python@rcn.com>
parents: 31478
diff changeset
299 }
59538d3b7cd2 Make reversed() transparent with respect to length.
Raymond Hettinger <python@rcn.com>
parents: 31478
diff changeset
300
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
301 PyDoc_STRVAR(reversed_doc,
33273
4ca9fa2353bf Fix docstring typo.
Raymond Hettinger <python@rcn.com>
parents: 31908
diff changeset
302 "reversed(sequence) -> reverse iterator over values of the sequence\n"
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
303 "\n"
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
304 "Return a reverse iterator");
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
305
35636
e22334b1da67 Convert iterator __len__() methods to a private API.
Raymond Hettinger <python@rcn.com>
parents: 33386
diff changeset
306 static PyObject *
31635
04eb2ebb46e2 Tidied up the implementations of reversed (including the custom ones
Raymond Hettinger <python@rcn.com>
parents: 31634
diff changeset
307 reversed_len(reversedobject *ro)
04eb2ebb46e2 Tidied up the implementations of reversed (including the custom ones
Raymond Hettinger <python@rcn.com>
parents: 31634
diff changeset
308 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
309 Py_ssize_t position, seqsize;
31908
058821d8aefd * Add unittests for iterators that report their length
Raymond Hettinger <python@rcn.com>
parents: 31635
diff changeset
310
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
311 if (ro->seq == NULL)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
312 return PyLong_FromLong(0);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
313 seqsize = PySequence_Size(ro->seq);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
314 if (seqsize == -1)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
315 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
316 position = ro->index + 1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
317 return PyLong_FromSsize_t((seqsize < position) ? 0 : position);
31635
04eb2ebb46e2 Tidied up the implementations of reversed (including the custom ones
Raymond Hettinger <python@rcn.com>
parents: 31634
diff changeset
318 }
04eb2ebb46e2 Tidied up the implementations of reversed (including the custom ones
Raymond Hettinger <python@rcn.com>
parents: 31634
diff changeset
319
36484
20f75d5e79e9 Renamed _length_cue() to __length_hint__(). See:
Armin Rigo <arigo@tunes.org>
parents: 36002
diff changeset
320 PyDoc_STRVAR(length_hint_doc, "Private method returning an estimate of len(list(it)).");
35636
e22334b1da67 Convert iterator __len__() methods to a private API.
Raymond Hettinger <python@rcn.com>
parents: 33386
diff changeset
321
e22334b1da67 Convert iterator __len__() methods to a private API.
Raymond Hettinger <python@rcn.com>
parents: 33386
diff changeset
322 static PyMethodDef reversediter_methods[] = {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
323 {"__length_hint__", (PyCFunction)reversed_len, METH_NOARGS, length_hint_doc},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
324 {NULL, NULL} /* sentinel */
31478
f30aaac00195 Let reversed() work with itself.
Raymond Hettinger <python@rcn.com>
parents: 31466
diff changeset
325 };
f30aaac00195 Let reversed() work with itself.
Raymond Hettinger <python@rcn.com>
parents: 31466
diff changeset
326
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
327 PyTypeObject PyReversed_Type = {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
328 PyVarObject_HEAD_INIT(&PyType_Type, 0)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
329 "reversed", /* tp_name */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
330 sizeof(reversedobject), /* tp_basicsize */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
331 0, /* tp_itemsize */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
332 /* methods */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
333 (destructor)reversed_dealloc, /* tp_dealloc */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
334 0, /* tp_print */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
335 0, /* tp_getattr */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
336 0, /* tp_setattr */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
337 0, /* tp_reserved */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
338 0, /* tp_repr */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
339 0, /* tp_as_number */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
340 0, /* tp_as_sequence */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
341 0, /* tp_as_mapping */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
342 0, /* tp_hash */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
343 0, /* tp_call */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
344 0, /* tp_str */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
345 PyObject_GenericGetAttr, /* tp_getattro */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
346 0, /* tp_setattro */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
347 0, /* tp_as_buffer */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
348 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
349 Py_TPFLAGS_BASETYPE, /* tp_flags */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
350 reversed_doc, /* tp_doc */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
351 (traverseproc)reversed_traverse,/* tp_traverse */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
352 0, /* tp_clear */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
353 0, /* tp_richcompare */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
354 0, /* tp_weaklistoffset */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
355 PyObject_SelfIter, /* tp_iter */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
356 (iternextfunc)reversed_next, /* tp_iternext */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
357 reversediter_methods, /* tp_methods */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
358 0, /* tp_members */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
359 0, /* tp_getset */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
360 0, /* tp_base */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
361 0, /* tp_dict */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
362 0, /* tp_descr_get */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
363 0, /* tp_descr_set */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
364 0, /* tp_dictoffset */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
365 0, /* tp_init */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
366 PyType_GenericAlloc, /* tp_alloc */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
367 reversed_new, /* tp_new */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 56216
diff changeset
368 PyObject_GC_Del, /* tp_free */
30865
41c4e143e6e6 Implement and apply PEP 322, reverse iteration
Raymond Hettinger <python@rcn.com>
parents: 30835
diff changeset
369 };