This commit rewrites the docstring for int() to incorporate the documentation
changes made in issue #16036. It also switches the docstrings for int(),
str(), range(), and slice() to use multi-line signatures.
* Formatting string, int, float and complex use the _PyUnicodeWriter API. It
avoids a temporary buffer in most cases.
* Add _PyUnicodeWriter_WriteStr() to restore the PyAccu optimization: just
keep a reference to the string if the output is only composed of one string
* Disable overallocation when formatting the last argument of str%args and
str.format(args)
* Overallocation allocates at least 100 characters: add min_length attribute
to the _PyUnicodeWriter structure
* Add new private functions: _PyUnicode_FastCopyCharacters(),
_PyUnicode_FastFill() and _PyUnicode_FromASCII()
The speed up is around 20% in average.
PyLong_AsDouble() and PyLong_AsUnsignedLongLong() now raise TypeError (rather
than SystemError) when passed a non-integer argument, matching the behavior of
all the other PyLong_As*() functions.
types. Added a new API function, PyUnicode_TransformDecimalToASCII(),
which transforms non-ASCII decimal digits in a Unicode string to their
ASCII equivalents.
(instances of int, float, complex, decimal.Decimal and
fractions.Fraction) that makes it easy to maintain the invariant that
hash(x) == hash(y) whenever x and y have equal value.
svn+ssh://pythondev@svn.python.org/python/trunk
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r79843 | mark.dickinson | 2010-04-06 17:46:09 +0100 (Tue, 06 Apr 2010) | 4 lines
Issue #8259: Get rid of 'outrageous left shift count' error when
left-shifting an integer by more than 2**31 on a 64-bit machine. Also
convert shift counts to a Py_ssize_t instead of a C long.
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r79844 | mark.dickinson | 2010-04-06 17:47:55 +0100 (Tue, 06 Apr 2010) | 1 line
Misc/NEWS entry for r79843.
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r78918 | mark.dickinson | 2010-03-13 11:34:40 +0000 (Sat, 13 Mar 2010) | 4 lines
Issue #8014: Fix PyLong_As<c-integer-type> methods not to produce an
internal error on non-integer input: they now raise TypeError instead.
This is needed for attributes declared via PyMemberDefs.
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r78920 | mark.dickinson | 2010-03-13 13:23:05 +0000 (Sat, 13 Mar 2010) | 3 lines
Issue #8014: Fix incorrect error checks in structmember.c, and re-enable
previously failing test_structmember.py tests.
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r77842 | mark.dickinson | 2010-01-30 10:08:33 +0000 (Sat, 30 Jan 2010) | 4 lines
Issue #7767: Add new C-API function PyLong_AsLongLongAndOverflow, a
long long variant of PyLong_AsLongAndOverflow. Patch by Case Van
Horsen.
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r77234 | mark.dickinson | 2010-01-02 14:45:40 +0000 (Sat, 02 Jan 2010) | 7 lines
Refactor some longobject internals: PyLong_AsDouble and _PyLong_AsScaledDouble
(the latter renamed to _PyLong_Frexp) now use the same core code. The
exponent produced by _PyLong_Frexp now has type Py_ssize_t instead of the
previously used int, and no longer needs scaling by PyLong_SHIFT. This
frees the math module from having to know anything about the PyLong
implementation. This closes issue #5576.
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r75110 | mark.dickinson | 2009-09-28 17:52:40 +0100 (Mon, 28 Sep 2009) | 9 lines
Style/consistency/nano-optimization nit: replace occurrences of
(high_bits << PyLong_SHIFT) + low_bits with
(high_bits << PyLong_SHIFT) | low_bits
in Objects/longobject.c. Motivation:
- shouldn't unnecessarily mix bit ops with arithmetic ops (style)
- this pattern should be spelt the same way thoughout (consistency)
- it's very very very slightly faster: no need to worry about
carries to the high digit (nano-optimization).
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r72202 | mark.dickinson | 2009-05-02 18:55:01 +0100 (Sat, 02 May 2009) | 3 lines
Remove unnecessary use of context for long getters.
(Related to issue #5880).
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r71772 | mark.dickinson | 2009-04-20 22:13:33 +0100 (Mon, 20 Apr 2009) | 5 lines
Issue #3166: Make long -> float (and int -> float) conversions
correctly rounded, using round-half-to-even. This ensures that the
value of float(n) doesn't depend on whether we're using 15-bit digits
or 30-bit digits for Python longs.
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r70542 | mark.dickinson | 2009-03-23 18:25:13 +0000 (Mon, 23 Mar 2009) | 14 lines
Issue #5512: speed up the long division algorithm for Python longs.
The basic algorithm remains the same; the most significant speedups
come from the following three changes:
(1) normalize by shifting instead of multiplying and dividing
(2) the old algorithm usually did an unnecessary extra iteration of
the outer loop; remove this. As a special case, this means that
long divisions with a single-digit result run twice as fast as
before.
(3) make inner loop much tighter.
Various benchmarks show speedups of between 50% and 150% for long
integer divisions and modulo operations.
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- 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.
svn+ssh://pythondev@svn.python.org/python/trunk
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r69634 | mark.dickinson | 2009-02-15 10:13:41 +0000 (Sun, 15 Feb 2009) | 6 lines
Issue #5260: Various portability and standards compliance fixes, optimizations
and cleanups in Objects/longobject.c. The most significant change is that
longs now use less memory: average savings are 2 bytes per long on 32-bit
systems and 6 bytes per long on 64-bit systems. (This memory saving already
exists in py3k.)
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r68947 | mark.dickinson | 2009-01-25 22:12:31 +0000 (Sun, 25 Jan 2009) | 3 lines
No need for carry to be type twodigits in _PyLong_AsByteArray; digit is large enough.
This change should silence a compiler warning on Windows.
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r68890 | mark.dickinson | 2009-01-24 15:27:44 +0000 (Sat, 24 Jan 2009) | 6 lines
Issue #4393: fix 3 classes of potential portability problems in longobject.c:
- fix some places where counters into ob_digit were declared as
int instead of Py_ssize_t
- add (twodigit) casts where necessary
- fix code in _PyLong_AsByteArray that uses << on negative values
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- fast path wasn't being properly taken for negative ints;
thanks Victor Stinner for pointing this out.
- use Py_SAFE_DOWNCAST instead of direct casting to digit
(it's safer, especially if we ever consider moving to 30-bit
digits)
- cleaner way to write negation
nb_long: remove last remaining use of nb_long
(in the struct module) from the core, set nb_long slots on all builtin
and extension types to 0, and remove uses of __long__ in test_complex
and test_binop.
Reviewed by Benjamin Peterson.
svn+ssh://pythondev@svn.python.org/python/trunk
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r65459 | gregory.p.smith | 2008-08-04 00:13:29 +0000 (Mon, 04 Aug 2008) | 4 lines
- Issue #1857: subprocess.Popen.poll gained an additional _deadstate keyword
argument in python 2.5, this broke code that subclassed Popen to include its
own poll method. Fixed my moving _deadstate to an _internal_poll method.
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r65472 | andrew.kuchling | 2008-08-04 01:43:43 +0000 (Mon, 04 Aug 2008) | 3 lines
Bug 3228: Explicitly supply the file mode to avoid creating executable files,
and add corresponding tests.
Possible 2.5 backport candidate
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r65481 | gregory.p.smith | 2008-08-04 07:33:37 +0000 (Mon, 04 Aug 2008) | 22 lines
Adds a sanity check to avoid a *very rare* infinite loop due to a corrupt tls
key list data structure in the thread startup path.
This change is a companion to r60148 which already successfully dealt with a
similar issue on thread shutdown.
In particular this loop has been observed happening from this call path:
#0 in find_key ()
#1 in PyThread_set_key_value ()
#2 in _PyGILState_NoteThreadState ()
#3 in PyThreadState_New ()
#4 in t_bootstrap ()
#5 in pthread_start_thread ()
I don't know how this happens but it does, *very* rarely. On more than
one hardware platform. I have not been able to reproduce it manually.
(A flaky mutex implementation on the system in question is one hypothesis).
As with r60148, the spinning we managed to observe in the wild was due to a
single list element pointing back upon itself.
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r65518 | mark.dickinson | 2008-08-04 21:30:09 +0000 (Mon, 04 Aug 2008) | 7 lines
Issue #1481296: (again!) Make conversion of a float NaN to an int or
long raise ValueError instead of returning 0. Also, change the error
message for conversion of an infinity to an integer, replacing 'long' by
'integer', so that it's appropriate for both long(float('inf')) and
int(float('inf')).
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r65536 | andrew.kuchling | 2008-08-05 01:00:57 +0000 (Tue, 05 Aug 2008) | 1 line
Bug 3228: take a test from Niels Gustaebel's patch, and based on his patch, check for having os.stat available
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r65581 | guido.van.rossum | 2008-08-07 18:51:38 +0000 (Thu, 07 Aug 2008) | 3 lines
Patch by Ian Charnas from issue 3517.
Add F_FULLFSYNC if it exists (OS X only so far).
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r65609 | antoine.pitrou | 2008-08-09 17:22:25 +0000 (Sat, 09 Aug 2008) | 3 lines
#3205: bz2 iterator fails silently on MemoryError
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r65637 | georg.brandl | 2008-08-11 09:07:59 +0000 (Mon, 11 Aug 2008) | 3 lines
- Issue #3537: Fix an assertion failure when an empty but presized dict
object was stored in the freelist.
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r65641 | jesse.noller | 2008-08-11 14:28:07 +0000 (Mon, 11 Aug 2008) | 2 lines
Remove the fqdn call for issue 3270
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r65644 | antoine.pitrou | 2008-08-11 17:21:36 +0000 (Mon, 11 Aug 2008) | 3 lines
#3134: shutil referenced undefined WindowsError symbol
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r65645 | jesse.noller | 2008-08-11 19:00:15 +0000 (Mon, 11 Aug 2008) | 2 lines
Fix the connection refused error part of issue 3419, use errno module instead of a static list of possible connection refused messages.
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Chris Jerdonek
Mark Dickinson
Victor Stinner
Christian Heimes
Victor Stinner
Martin v. Löwis
Stefan Krah
Nadeem Vawda
Brian Curtin
Ezio Melotti
Mark Dickinson
Alexander Belopolsky
Georg Brandl
Benjamin Peterson
Antoine Pitrou
Stefan Krah
Alexandre Vassalotti
Raymond Hettinger
Neal Norwitz
Facundo Batista
Robert Schuppenies