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| author | Mark Dickinson <dickinsm@gmail.com> | 2009-03-18 20:06:12 (GMT) |
|---|---|---|
| committer | Mark Dickinson <dickinsm@gmail.com> | 2009-03-18 20:06:12 (GMT) |
| commit | bd7926478de92a2a0ef4440e1a9ae61b706a80d2 (patch) | |
| tree | f92ef0133e96195e1875cc74b046474aeb7be155 /Doc/library/sys.rst | |
| parent | e7f45b8e5948d7367c3754b0506b082d1296138f (diff) | |
| download | cpython-bd7926478de92a2a0ef4440e1a9ae61b706a80d2.zip cpython-bd7926478de92a2a0ef4440e1a9ae61b706a80d2.tar.gz cpython-bd7926478de92a2a0ef4440e1a9ae61b706a80d2.tar.bz2 | |
Issue #4258: Make it possible to use 30-bit digits for PyLongs:
- new configure option --enable-big-digits
- new structseq sys.int_info giving information about the internal format
By default, 30-bit digits are enabled on 64-bit machines but
disabled on 32-bit machines.
Diffstat (limited to 'Doc/library/sys.rst')
| -rw-r--r-- | Doc/library/sys.rst | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst index a00c516..091b4d6 100644 --- a/Doc/library/sys.rst +++ b/Doc/library/sys.rst @@ -413,6 +413,23 @@ always available. same information. +.. data:: int_info + + A struct sequence that holds information about Python's + internal representation of integers. The attributes are read only. + + +-------------------------+----------------------------------------------+ + | attribute | explanation | + +=========================+==============================================+ + | :const:`bits_per_digit` | number of bits held in each digit. Python | + | | integers are stored internally in base | + | | ``2**int_info.bits_per_digit`` | + +-------------------------+----------------------------------------------+ + | :const:`sizeof_digit` | size in bytes of the C type used to | + | | represent a digit | + +-------------------------+----------------------------------------------+ + + .. function:: intern(string) Enter *string* in the table of "interned" strings and return the interned string |