cpython/Objects/enumobject.c

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/* enumerate object */
#include "Python.h"
typedef struct {
PyObject_HEAD
long en_index; /* current index of enumeration */
PyObject* en_sit; /* secondary iterator of enumeration */
PyObject* en_result; /* result tuple */
} enumobject;
static PyObject *
enum_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
enumobject *en;
PyObject *seq = NULL;
static char *kwlist[] = {"sequence", 0};
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O:enumerate", kwlist,
&seq))
return NULL;
en = (enumobject *)type->tp_alloc(type, 0);
if (en == NULL)
return NULL;
en->en_index = 0;
en->en_sit = PyObject_GetIter(seq);
if (en->en_sit == NULL) {
Py_DECREF(en);
return NULL;
}
en->en_result = PyTuple_Pack(2, Py_None, Py_None);
if (en->en_result == NULL) {
Py_DECREF(en);
return NULL;
}
return (PyObject *)en;
}
static void
enum_dealloc(enumobject *en)
{
PyObject_GC_UnTrack(en);
Py_XDECREF(en->en_sit);
Py_XDECREF(en->en_result);
en->ob_type->tp_free(en);
}
static int
enum_traverse(enumobject *en, visitproc visit, void *arg)
{
Py_VISIT(en->en_sit);
Py_VISIT(en->en_result);
return 0;
}
static PyObject *
enum_next(enumobject *en)
{
PyObject *next_index;
PyObject *next_item;
PyObject *result = en->en_result;
PyObject *it = en->en_sit;
Merged revisions 53623-53858 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r53624 | peter.astrand | 2007-02-02 20:06:36 +0100 (Fri, 02 Feb 2007) | 1 line We had several if statements checking the value of a fd. This is unsafe, since valid fds might be zero. We should check for not None instead. ........ r53635 | kurt.kaiser | 2007-02-05 07:03:18 +0100 (Mon, 05 Feb 2007) | 2 lines Add 'raw' support to configHandler. Patch 1650174 Tal Einat. ........ r53641 | kurt.kaiser | 2007-02-06 00:02:16 +0100 (Tue, 06 Feb 2007) | 5 lines 1. Calltips now 'handle' tuples in the argument list (display '<tuple>' :) Suggested solution by Christos Georgiou, Bug 791968. 2. Clean up tests, were not failing when they should have been. 4. Remove some camelcase and an unneeded try/except block. ........ r53644 | kurt.kaiser | 2007-02-06 04:21:40 +0100 (Tue, 06 Feb 2007) | 2 lines Clean up ModifiedInterpreter.runcode() structure ........ r53646 | peter.astrand | 2007-02-06 16:37:50 +0100 (Tue, 06 Feb 2007) | 1 line Applied patch 1124861.3.patch to solve bug #1124861: Automatically create pipes on Windows, if GetStdHandle fails. Will backport. ........ r53648 | lars.gustaebel | 2007-02-06 19:38:13 +0100 (Tue, 06 Feb 2007) | 4 lines Patch #1652681: create nonexistent files in append mode and allow appending to empty files. ........ r53649 | kurt.kaiser | 2007-02-06 20:09:43 +0100 (Tue, 06 Feb 2007) | 4 lines Updated patch (CodeContext.061217.patch) to [ 1362975 ] CodeContext - Improved text indentation Tal Einat 16Dec06 ........ r53650 | kurt.kaiser | 2007-02-06 20:21:19 +0100 (Tue, 06 Feb 2007) | 2 lines narrow exception per [ 1540849 ] except too broad ........ r53653 | kurt.kaiser | 2007-02-07 04:39:41 +0100 (Wed, 07 Feb 2007) | 4 lines [ 1621265 ] Auto-completion list placement Move AC window below input line unless not enough space, then put it above. Patch: Tal Einat ........ r53654 | kurt.kaiser | 2007-02-07 09:07:13 +0100 (Wed, 07 Feb 2007) | 2 lines Handle AttributeError during calltip lookup ........ r53656 | raymond.hettinger | 2007-02-07 21:08:22 +0100 (Wed, 07 Feb 2007) | 3 lines SF #1615701: make d.update(m) honor __getitem__() and keys() in dict subclasses ........ r53658 | raymond.hettinger | 2007-02-07 22:04:20 +0100 (Wed, 07 Feb 2007) | 1 line SF: 1397711 Set docs conflated immutable and hashable ........ r53660 | raymond.hettinger | 2007-02-07 22:42:17 +0100 (Wed, 07 Feb 2007) | 1 line Check for a common user error with defaultdict(). ........ r53662 | raymond.hettinger | 2007-02-07 23:24:07 +0100 (Wed, 07 Feb 2007) | 1 line Bug #1575169: operator.isSequenceType() now returns False for subclasses of dict. ........ r53664 | raymond.hettinger | 2007-02-08 00:49:03 +0100 (Thu, 08 Feb 2007) | 1 line Silence compiler warning ........ r53666 | raymond.hettinger | 2007-02-08 01:07:32 +0100 (Thu, 08 Feb 2007) | 1 line Do not let overflows in enumerate() and count() pass silently. ........ r53668 | raymond.hettinger | 2007-02-08 01:50:39 +0100 (Thu, 08 Feb 2007) | 1 line Bypass set specific optimizations for set and frozenset subclasses. ........ r53670 | raymond.hettinger | 2007-02-08 02:42:35 +0100 (Thu, 08 Feb 2007) | 1 line Fix docstring bug ........ r53671 | martin.v.loewis | 2007-02-08 10:13:36 +0100 (Thu, 08 Feb 2007) | 3 lines Bug #1653736: Complain about keyword arguments to time.isoformat. Will backport to 2.5. ........ r53679 | kurt.kaiser | 2007-02-08 23:58:18 +0100 (Thu, 08 Feb 2007) | 6 lines Corrected some bugs in AutoComplete. Also, Page Up/Down in ACW implemented; mouse and cursor selection in ACWindow implemented; double Tab inserts current selection and closes ACW (similar to double-click and Return); scroll wheel now works in ACW. Added AutoComplete instructions to IDLE Help. ........ r53689 | martin.v.loewis | 2007-02-09 13:19:32 +0100 (Fri, 09 Feb 2007) | 3 lines Bug #1653736: Properly discard third argument to slot_nb_inplace_power. Will backport. ........ r53691 | martin.v.loewis | 2007-02-09 13:36:48 +0100 (Fri, 09 Feb 2007) | 4 lines Bug #1600860: Search for shared python library in LIBDIR, not lib/python/config, on "linux" and "gnu" systems. Will backport. ........ r53693 | martin.v.loewis | 2007-02-09 13:58:49 +0100 (Fri, 09 Feb 2007) | 2 lines Update broken link. Will backport to 2.5. ........ r53697 | georg.brandl | 2007-02-09 19:48:41 +0100 (Fri, 09 Feb 2007) | 2 lines Bug #1656078: typo in in profile docs. ........ r53731 | brett.cannon | 2007-02-11 06:36:00 +0100 (Sun, 11 Feb 2007) | 3 lines Change a very minor inconsistency (that is purely cosmetic) in the AST definition. ........ r53735 | skip.montanaro | 2007-02-11 19:24:37 +0100 (Sun, 11 Feb 2007) | 1 line fix trace.py --ignore-dir ........ r53741 | brett.cannon | 2007-02-11 20:44:41 +0100 (Sun, 11 Feb 2007) | 3 lines Check in changed Python-ast.c from a cosmetic change to Python.asdl (in r53731). ........ r53751 | brett.cannon | 2007-02-12 04:51:02 +0100 (Mon, 12 Feb 2007) | 5 lines Modify Parser/asdl_c.py so that the __version__ number for Python/Python-ast.c is specified at the top of the file. Also add a note that Python/Python-ast.c needs to be committed separately after a change to the AST grammar to capture the revision number of the change (which is what __version__ is set to). ........ r53752 | lars.gustaebel | 2007-02-12 10:25:53 +0100 (Mon, 12 Feb 2007) | 3 lines Bug #1656581: Point out that external file objects are supposed to be at position 0. ........ r53754 | martin.v.loewis | 2007-02-12 13:21:10 +0100 (Mon, 12 Feb 2007) | 3 lines Patch 1463026: Support default namespace in XMLGenerator. Fixes #847665. Will backport. ........ r53757 | armin.rigo | 2007-02-12 17:23:24 +0100 (Mon, 12 Feb 2007) | 4 lines Fix the line to what is my guess at the original author's meaning. (The line has no effect anyway, but is present because it's customary call the base class __init__). ........ r53763 | martin.v.loewis | 2007-02-13 09:34:45 +0100 (Tue, 13 Feb 2007) | 3 lines Patch #685268: Consider a package's __path__ in imputil. Will backport. ........ r53765 | martin.v.loewis | 2007-02-13 10:49:38 +0100 (Tue, 13 Feb 2007) | 2 lines Patch #698833: Support file decryption in zipfile. ........ r53766 | martin.v.loewis | 2007-02-13 11:10:39 +0100 (Tue, 13 Feb 2007) | 3 lines Patch #1517891: Make 'a' create the file if it doesn't exist. Fixes #1514451. ........ r53767 | martin.v.loewis | 2007-02-13 13:08:24 +0100 (Tue, 13 Feb 2007) | 3 lines Bug #1658794: Remove extraneous 'this'. Will backport to 2.5. ........ r53769 | martin.v.loewis | 2007-02-13 13:14:19 +0100 (Tue, 13 Feb 2007) | 3 lines Patch #1657276: Make NETLINK_DNRTMSG conditional. Will backport. ........ r53771 | lars.gustaebel | 2007-02-13 17:09:24 +0100 (Tue, 13 Feb 2007) | 4 lines Patch #1647484: Renamed GzipFile's filename attribute to name. The filename attribute is still accessible as a property that emits a DeprecationWarning. ........ r53772 | lars.gustaebel | 2007-02-13 17:24:00 +0100 (Tue, 13 Feb 2007) | 3 lines Strip the '.gz' extension from the filename that is written to the gzip header. ........ r53774 | martin.v.loewis | 2007-02-14 11:07:37 +0100 (Wed, 14 Feb 2007) | 2 lines Patch #1432399: Add HCI sockets. ........ r53775 | martin.v.loewis | 2007-02-14 12:30:07 +0100 (Wed, 14 Feb 2007) | 2 lines Update 1432399 to removal of _BT_SOCKADDR_MEMB. ........ r53776 | martin.v.loewis | 2007-02-14 12:30:56 +0100 (Wed, 14 Feb 2007) | 3 lines Ignore directory time stamps when considering whether to rerun libffi configure. ........ r53778 | lars.gustaebel | 2007-02-14 15:45:12 +0100 (Wed, 14 Feb 2007) | 4 lines A missing binary mode in AppendTest caused failures in Windows Buildbot. ........ r53782 | martin.v.loewis | 2007-02-15 10:51:35 +0100 (Thu, 15 Feb 2007) | 2 lines Patch #1397848: add the reasoning behind no-resize-on-shrinkage. ........ r53783 | georg.brandl | 2007-02-15 11:37:59 +0100 (Thu, 15 Feb 2007) | 2 lines Make functools.wraps() docs a bit clearer. ........ r53785 | georg.brandl | 2007-02-15 12:29:04 +0100 (Thu, 15 Feb 2007) | 2 lines Patch #1494140: Add documentation for the new struct.Struct object. ........ r53787 | georg.brandl | 2007-02-15 12:29:55 +0100 (Thu, 15 Feb 2007) | 2 lines Add missing \versionadded. ........ r53800 | brett.cannon | 2007-02-15 23:54:39 +0100 (Thu, 15 Feb 2007) | 11 lines Update the encoding package's search function to use absolute imports when calling __import__. This helps make the expected search locations for encoding modules be more explicit. One could use an explicit value for __path__ when making the call to __import__ to force the exact location searched for encodings. This would give the most strict search path possible if one is worried about malicious code being imported. The unfortunate side-effect of that is that if __path__ was modified on 'encodings' on purpose in a safe way it would not be picked up in future __import__ calls. ........ r53801 | brett.cannon | 2007-02-16 20:33:01 +0100 (Fri, 16 Feb 2007) | 2 lines Make the __import__ call in encodings.__init__ absolute with a level 0 call. ........ r53809 | vinay.sajip | 2007-02-16 23:36:24 +0100 (Fri, 16 Feb 2007) | 1 line Minor fix for currentframe (SF #1652788). ........ r53818 | raymond.hettinger | 2007-02-19 03:03:19 +0100 (Mon, 19 Feb 2007) | 3 lines Extend work on revision 52962: Eliminate redundant calls to PyObject_Hash(). ........ r53820 | raymond.hettinger | 2007-02-19 05:08:43 +0100 (Mon, 19 Feb 2007) | 1 line Add merge() function to heapq. ........ r53821 | raymond.hettinger | 2007-02-19 06:28:28 +0100 (Mon, 19 Feb 2007) | 1 line Add tie-breaker count to preserve sort stability. ........ r53822 | raymond.hettinger | 2007-02-19 07:59:32 +0100 (Mon, 19 Feb 2007) | 1 line Use C heapreplace() instead of slower _siftup() in pure python. ........ r53823 | raymond.hettinger | 2007-02-19 08:30:21 +0100 (Mon, 19 Feb 2007) | 1 line Add test for merge stability ........ r53824 | raymond.hettinger | 2007-02-19 10:14:10 +0100 (Mon, 19 Feb 2007) | 1 line Provide an example of defaultdict with non-zero constant factory function. ........ r53825 | lars.gustaebel | 2007-02-19 10:54:47 +0100 (Mon, 19 Feb 2007) | 2 lines Moved misplaced news item. ........ r53826 | martin.v.loewis | 2007-02-19 11:55:19 +0100 (Mon, 19 Feb 2007) | 3 lines Patch #1490190: posixmodule now includes os.chflags() and os.lchflags() functions on platforms where the underlying system calls are available. ........ r53827 | raymond.hettinger | 2007-02-19 19:15:04 +0100 (Mon, 19 Feb 2007) | 1 line Fixup docstrings for merge(). ........ r53829 | raymond.hettinger | 2007-02-19 21:44:04 +0100 (Mon, 19 Feb 2007) | 1 line Fixup set/dict interoperability. ........ r53837 | raymond.hettinger | 2007-02-21 06:20:38 +0100 (Wed, 21 Feb 2007) | 1 line Add itertools.izip_longest(). ........ r53838 | raymond.hettinger | 2007-02-21 18:22:05 +0100 (Wed, 21 Feb 2007) | 1 line Remove filler struct item and fix leak. ........
2007-02-23 11:07:44 -04:00
if (en->en_index == LONG_MAX) {
PyErr_SetString(PyExc_OverflowError,
"enumerate() is limited to LONG_MAX items");
return NULL;
}
next_item = (*it->ob_type->tp_iternext)(it);
if (next_item == NULL)
return NULL;
next_index = PyInt_FromLong(en->en_index);
if (next_index == NULL) {
Py_DECREF(next_item);
return NULL;
}
en->en_index++;
if (result->ob_refcnt == 1) {
Py_INCREF(result);
Py_DECREF(PyTuple_GET_ITEM(result, 0));
Py_DECREF(PyTuple_GET_ITEM(result, 1));
} else {
result = PyTuple_New(2);
if (result == NULL) {
Py_DECREF(next_index);
Py_DECREF(next_item);
return NULL;
}
}
PyTuple_SET_ITEM(result, 0, next_index);
PyTuple_SET_ITEM(result, 1, next_item);
return result;
}
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PyDoc_STRVAR(enum_doc,
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"enumerate(iterable) -> iterator for index, value of iterable\n"
"\n"
"Return an enumerate object. iterable must be an other object that supports\n"
"iteration. The enumerate object yields pairs containing a count (from\n"
"zero) and a value yielded by the iterable argument. enumerate is useful\n"
"for obtaining an indexed list: (0, seq[0]), (1, seq[1]), (2, seq[2]), ...");
PyTypeObject PyEnum_Type = {
PyObject_HEAD_INIT(&PyType_Type)
0, /* ob_size */
"enumerate", /* tp_name */
sizeof(enumobject), /* tp_basicsize */
0, /* tp_itemsize */
/* methods */
(destructor)enum_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
Py_TPFLAGS_BASETYPE, /* tp_flags */
enum_doc, /* tp_doc */
(traverseproc)enum_traverse, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
PyObject_SelfIter, /* tp_iter */
(iternextfunc)enum_next, /* tp_iternext */
0, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
PyType_GenericAlloc, /* tp_alloc */
enum_new, /* tp_new */
PyObject_GC_Del, /* tp_free */
};
/* Reversed Object ***************************************************************/
typedef struct {
PyObject_HEAD
Py_ssize_t index;
PyObject* seq;
} reversedobject;
static PyObject *
reversed_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
Py_ssize_t n;
PyObject *seq;
reversedobject *ro;
if (!PyArg_UnpackTuple(args, "reversed", 1, 1, &seq))
return NULL;
if (PyObject_HasAttrString(seq, "__reversed__"))
return PyObject_CallMethod(seq, "__reversed__", NULL);
if (!PySequence_Check(seq)) {
PyErr_SetString(PyExc_TypeError,
"argument to reversed() must be a sequence");
return NULL;
}
n = PySequence_Size(seq);
if (n == -1)
return NULL;
ro = (reversedobject *)type->tp_alloc(type, 0);
if (ro == NULL)
return NULL;
ro->index = n-1;
Py_INCREF(seq);
ro->seq = seq;
return (PyObject *)ro;
}
static void
reversed_dealloc(reversedobject *ro)
{
PyObject_GC_UnTrack(ro);
Py_XDECREF(ro->seq);
ro->ob_type->tp_free(ro);
}
static int
reversed_traverse(reversedobject *ro, visitproc visit, void *arg)
{
Py_VISIT(ro->seq);
return 0;
}
static PyObject *
reversed_next(reversedobject *ro)
{
PyObject *item;
Py_ssize_t index = ro->index;
if (index >= 0) {
item = PySequence_GetItem(ro->seq, index);
if (item != NULL) {
ro->index--;
return item;
}
if (PyErr_ExceptionMatches(PyExc_IndexError) ||
PyErr_ExceptionMatches(PyExc_StopIteration))
PyErr_Clear();
}
ro->index = -1;
Py_CLEAR(ro->seq);
return NULL;
}
PyDoc_STRVAR(reversed_doc,
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"reversed(sequence) -> reverse iterator over values of the sequence\n"
"\n"
"Return a reverse iterator");
static PyObject *
reversed_len(reversedobject *ro)
{
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Py_ssize_t position, seqsize;
if (ro->seq == NULL)
return PyInt_FromLong(0);
seqsize = PySequence_Size(ro->seq);
if (seqsize == -1)
return NULL;
position = ro->index + 1;
return PyInt_FromSsize_t((seqsize < position) ? 0 : position);
}
PyDoc_STRVAR(length_hint_doc, "Private method returning an estimate of len(list(it)).");
static PyMethodDef reversediter_methods[] = {
{"__length_hint__", (PyCFunction)reversed_len, METH_NOARGS, length_hint_doc},
{NULL, NULL} /* sentinel */
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};
PyTypeObject PyReversed_Type = {
PyObject_HEAD_INIT(&PyType_Type)
0, /* ob_size */
"reversed", /* tp_name */
sizeof(reversedobject), /* tp_basicsize */
0, /* tp_itemsize */
/* methods */
(destructor)reversed_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
Py_TPFLAGS_BASETYPE, /* tp_flags */
reversed_doc, /* tp_doc */
(traverseproc)reversed_traverse,/* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
PyObject_SelfIter, /* tp_iter */
(iternextfunc)reversed_next, /* tp_iternext */
reversediter_methods, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
PyType_GenericAlloc, /* tp_alloc */
reversed_new, /* tp_new */
PyObject_GC_Del, /* tp_free */
};