sliceobject ssize_t (and index) not completed

[jimjjewett]

BPO	1456470
Nosy	@loewis

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/loewis'
closed_at = <Date 2006-04-03.11:38:29.000>
created_at = <Date 2006-03-22.22:06:13.000>
labels = ['extension-modules']
title = 'sliceobject ssize_t (and index) not completed'
updated_at = <Date 2006-04-03.11:38:29.000>
user = 'https://bugs.python.org/jimjjewett'

bugs.python.org fields:

activity = <Date 2006-04-03.11:38:29.000>
actor = 'loewis'
assignee = 'loewis'
closed = True
closed_date = None
closer = None
components = ['Extension Modules']
creation = <Date 2006-03-22.22:06:13.000>
creator = 'jimjjewett'
dependencies = []
files = []
hgrepos = []
issue_num = 1456470
keywords = []
message_count = 3.0
messages = ['27849', '27850', '27851']
nosy_count = 2.0
nosy_names = ['loewis', 'jimjjewett']
pr_nums = []
priority = 'high'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue1456470'
versions = ['Python 2.5']

[jimjjewett]

sliceobject and ceval changed the parameter types of
slice objects to ssize_t, but the code still requires
an int (sometimes not even a long); it should use the
new __index__ slot; at the very least, it should be
consistent about what it does accept.

In http://svn.python.org/view/python/trunk/Objects/
sliceobject.c?rev=42382&view=markup

[issue 1] function PySlice_GetIndices takes Py_ssize_t
parameters for (length, start, stop, step)

but then does a PyInt_Check on each of start, stop,
step. (An XXX to allow longs was also removed.) It *
should* use the new __index__ slot.

[issue 2] Later in the same file, function slice_
indices takes a PyObject len parameter, but then uses
PyInt_AsLong rather than __index__ (or even PyInt_
AsSsize_t) to create Py_ssize_t ilen.

[issue 3]

http://svn.python.org/view/python/trunk/Python/ceval.c?
rev=42382&view=markup

function _PyEval_SliceIndex accepts only ints and
longs, and longs will be converted to ints with
clipping.

It should allow anything with __index__, and clip only
to ssize_t rather than int.

[issue 4] ISINT still insists on int or long -- I
thought I saw a fix for this already in the index
patches.

[issue 5]
apply_slice and assign_slice changed the types of ilow
and ihigh, but still initializes them to INT_MAX
rather than ssize_t max.

[loewis]

Logged In: YES
user_id=21627

Would you like to work on a patch?

[loewis]

Logged In: YES
user_id=21627

I believe these are all fixed as of 43583 (and earlier).