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Patch #2488: Add sys.maxsize.

This commit is contained in:
Martin v. Löwis 2008-05-20 08:11:19 +00:00
parent b7e419ebb9
commit 4dd019fde3
3 changed files with 10 additions and 0 deletions
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5
Doc/library/sys.rst
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@ -521,6 +521,11 @@ always available.
is at least 2\*\*31-1. The largest negative integer is ``-maxint-1`` --- the is at least 2\*\*31-1. The largest negative integer is ``-maxint-1`` --- the
asymmetry results from the use of 2's complement binary arithmetic. asymmetry results from the use of 2's complement binary arithmetic.
.. data:: maxsize
The largest positive integer supported by the platform's Py_ssize_t type,
and thus the maximum size lists, strings, dicts, and many other containers
can have.
.. data:: maxunicode .. data:: maxunicode

2
Misc/NEWS
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@ -12,6 +12,8 @@ What's New in Python 2.6 beta 1?
Core and Builtins Core and Builtins
----------------- -----------------
- Patch #2488: Add sys.maxsize.
- Issue #2353: file.xreadlines() now emits a Py3k warning. - Issue #2353: file.xreadlines() now emits a Py3k warning.
- Issue #2863: generators now have a ``gen.__name__`` attribute that - Issue #2863: generators now have a ``gen.__name__`` attribute that

3
Python/sysmodule.c
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@ -992,6 +992,7 @@ PyDoc_STR(
Static objects:\n\ Static objects:\n\
\n\ \n\
maxint -- the largest supported integer (the smallest is -maxint-1)\n\ maxint -- the largest supported integer (the smallest is -maxint-1)\n\
maxsize -- the largest supported length of containers.\n\
maxunicode -- the largest supported character\n\ maxunicode -- the largest supported character\n\
builtin_module_names -- tuple of module names built into this interpreter\n\ builtin_module_names -- tuple of module names built into this interpreter\n\
version -- the version of this interpreter as a string\n\ version -- the version of this interpreter as a string\n\
@ -1345,6 +1346,8 @@ _PySys_Init(void)
PyString_FromString(Py_GetPrefix())); PyString_FromString(Py_GetPrefix()));
SET_SYS_FROM_STRING("exec_prefix", SET_SYS_FROM_STRING("exec_prefix",
PyString_FromString(Py_GetExecPrefix())); PyString_FromString(Py_GetExecPrefix()));
SET_SYS_FROM_STRING("maxsize",
PyInt_FromSsize_t(PY_SSIZE_T_MAX));
SET_SYS_FROM_STRING("maxint", SET_SYS_FROM_STRING("maxint",
PyInt_FromLong(PyInt_GetMax())); PyInt_FromLong(PyInt_GetMax()));
SET_SYS_FROM_STRING("py3kwarning", SET_SYS_FROM_STRING("py3kwarning",