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author | Steve Dower <steve.dower@microsoft.com> | 2017-02-04 15:05:50 -0800 |
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committer | Steve Dower <steve.dower@microsoft.com> | 2017-02-04 15:05:50 -0800 |
commit | 3b0e4320092ac0504b6670cafaf0301b908c91fc (patch) | |
tree | d3be1b6b844d61763bb366fa21ceed475e5703fd /Doc/c-api/slice.rst | |
parent | b2fa705fd3887c326e811c418469c784353027f4 (diff) | |
parent | f687fbcd73c14dfcbe086eb5cd94b298f1e81e72 (diff) | |
download | cpython-3b0e4320092ac0504b6670cafaf0301b908c91fc.tar.gz |
Issue #29392: Prevent crash when passing invalid arguments into msvcrt module.
Diffstat (limited to 'Doc/c-api/slice.rst')
-rw-r--r-- | Doc/c-api/slice.rst | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/Doc/c-api/slice.rst b/Doc/c-api/slice.rst index a825164918..5606ae41a5 100644 --- a/Doc/c-api/slice.rst +++ b/Doc/c-api/slice.rst @@ -56,3 +56,40 @@ Slice Objects .. versionchanged:: 3.2 The parameter type for the *slice* parameter was ``PySliceObject*`` before. + + .. versionchanged:: 3.6.1 + If ``Py_LIMITED_API`` is not set or set to the value between ``0x03050400`` + and ``0x03060000`` (not including) or ``0x03060100`` or higher + :c:func:`!PySlice_GetIndicesEx` is implemented as a macro using + :c:func:`PySlice_Unpack` and :c:func:`PySlice_AdjustIndices`. + Arguments *start*, *stop* and *step* are evaluated more than once. + + .. deprecated:: 3.6.1 + If ``Py_LIMITED_API`` is set to the value less than ``0x03050400`` or + between ``0x03060000`` and ``0x03060100`` (not including) + :c:func:`!PySlice_GetIndicesEx` is a deprecated function. + + +.. c:function:: int PySlice_Unpack(PyObject *slice, Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step) + + Extract the start, stop and step data members from a slice object as + C integers. Silently reduce values larger than ``PY_SSIZE_T_MAX`` to + ``PY_SSIZE_T_MAX``, silently boost the start and stop values less than + ``-PY_SSIZE_T_MAX-1`` to ``-PY_SSIZE_T_MAX-1``, and silently boost the step + values less than ``-PY_SSIZE_T_MAX`` to ``-PY_SSIZE_T_MAX``. + + Return ``-1`` on error, ``0`` on success. + + .. versionadded:: 3.6.1 + + +.. c:function:: Py_ssize_t PySlice_AdjustIndices(Py_ssize_t length, Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t step) + + Adjust start/end slice indices assuming a sequence of the specified length. + Out of bounds indices are clipped in a manner consistent with the handling + of normal slices. + + Return the length of the slice. Always successful. Doesn't call Python + code. + + .. versionadded:: 3.6.1 |