Commit Graph

348 Commits

Author SHA1 Message Date
Raymond Hettinger ea3fdf44a2 SF patch #659536: Use PyArg_UnpackTuple where possible.
Obtain cleaner coding and a system wide
performance boost by using the fast, pre-parsed
PyArg_Unpack function instead of PyArg_ParseTuple
function which is driven by a format string.
2002-12-29 16:33:45 +00:00
Raymond Hettinger f8bcfb13f1 SF Bug 645777: list.extend() works with any iterable and is no longer
experimental.
2002-12-29 05:49:09 +00:00
Michael W. Hudson a69c030c15 The final tweaks before closing
[ 633152 ] list slice ass ignores subtypes of list

Allow arbitrary sequences on the RHS of extended slices.
2002-12-05 21:32:32 +00:00
Tim Peters b9099c3df4 SF patch 637176: list.sort crasher
Armin Rigo's Draconian but effective fix for

SF bug 453523: list.sort crasher

slightly fiddled to catch more cases of list mutation.  The dreaded
internal "immutable list type" is gone!  OTOH, if you look at a list
*while* it's being sorted now, it will appear to be empty.  Better
than a core dump.
2002-11-12 22:08:10 +00:00
Neal Norwitz 03b109afc0 Use PyOS_snprintf() instead of sprintf and wrap the long line 2002-11-05 22:41:37 +00:00
Michael W. Hudson 5da854fe51 This is Alex Martelli's patch
[ 633870 ] allow any seq assignment to a list slice

plus a very silly little test case of my own.
2002-11-05 17:38:05 +00:00
Guido van Rossum bfa5a14adb Darn! Don't divide by zero. Bad fix. :-) 2002-10-11 23:39:35 +00:00
Guido van Rossum a5c0e6d6c8 Add checks for size overflow on list*n, list+list, tuple+tuple.
Will backport.
2002-10-11 21:05:56 +00:00
Neal Norwitz bb9c5f5032 PyObject_RichCompareBool() already returns -1, 0, or 1, so return its value 2002-09-05 21:32:55 +00:00
Raymond Hettinger aae5999b44 Micro-optimization for list_contains. Factored double if test
out of the loop.
2002-09-05 14:23:49 +00:00
Tim Peters e05f65a0c6 1. Combined the base and length arrays into a single array of structs.
This is friendlier for caches.

2. Cut MIN_GALLOP to 7, but added a per-sort min_gallop vrbl that adapts
   the "get into galloping mode" threshold higher when galloping isn't
   paying, and lower when it is.  There's no known case where this hurts.
   It's (of course) neutral for /sort, \sort and =sort.  It also happens
   to be neutral for !sort.  It cuts a tiny # of compares in 3sort and +sort.
   For *sort, it reduces the # of compares to better than what this used to
   do when MIN_GALLOP was hardcoded to 10 (it did about 0.1% more *sort
   compares before, but given how close we are to the limit, this is "a
   lot"!).  %sort used to do about 1.5% more compares, and ~sort about
   3.6% more.  Here are exact counts:

 i    *sort    3sort    +sort    %sort    ~sort    !sort
15   449235    33019    33016    51328   188720    65534  before
     448885    33016    33007    50426   182083    65534  after
      0.08%    0.01%    0.03%    1.79%    3.65%    0.00%  %ch from after

16   963714    65824    65809   103409   377634   131070
     962991    65821    65808   101667   364341   131070
      0.08%    0.00%    0.00%    1.71%    3.65%    0.00%

17  2059092   131413   131362   209130   755476   262142
    2057533   131410   131361   206193   728871   262142
      0.08%    0.00%    0.00%    1.42%    3.65%    0.00%

18  4380687   262440   262460   421998  1511174   524286
    4377402   262437   262459   416347  1457945   524286
      0.08%    0.00%    0.00%    1.36%    3.65%    0.00%

19  9285709   524581   524634   848590  3022584  1048574
    9278734   524580   524633   837947  2916107  1048574
      0.08%    0.00%    0.00%    1.27%    3.65%    0.00%

20 19621118  1048960  1048942  1715806  6045418  2097150
   19606028  1048958  1048941  1694896  5832445  2097150
      0.08%    0.00%    0.00%    1.23%    3.65%    0.00%

3. Added some key asserts I overlooked before.

4. Updated the doc file.
2002-08-10 05:21:15 +00:00
Tim Peters 6063e2615f PyList_Reverse(): This was leaking a reference to Py_None on every call.
I believe I introduced this bug when I refactored the reversal code so
that the mergesort could use it too.  It's not a problem on the 2.2 branch.
2002-08-08 01:06:39 +00:00
Tim Peters 66860f6da4 Sped the usual case for sorting by calling PyObject_RichCompareBool
directly when no comparison function is specified.  This saves a layer
of function call on every compare then.  Measured speedups:

 i    2**i  *sort  \sort  /sort  3sort  +sort  %sort  ~sort  =sort  !sort
15   32768  12.5%   0.0%   0.0% 100.0%   0.0%  50.0% 100.0% 100.0% -50.0%
16   65536   8.7%   0.0%   0.0%   0.0%   0.0%   0.0%  12.5%   0.0%   0.0%
17  131072   8.0%  25.0%   0.0%  25.0%   0.0%  14.3%   5.9%   0.0%   0.0%
18  262144   6.3% -10.0%  12.5%  11.1%   0.0%   6.3%   5.6%  12.5%   0.0%
19  524288   5.3%   5.9%   0.0%   5.6%   0.0%   5.9%   5.4%   0.0%   2.9%
20 1048576   5.3%   2.9%   2.9%   5.1%   2.8%   1.3%   5.9%   2.9%   4.2%

The best indicators are those that take significant time (larger i), and
where sort doesn't do very few compares (so *sort and ~sort benefit most
reliably).  The large numbers are due to roundoff noise combined with
platform variability; e.g., the 14.3% speedup for %sort at i=17 reflects
a printed elapsed time of 0.18 seconds falling to 0.17, but a change in
the last digit isn't really meaningful (indeed, if it really took 0.175
seconds, one electron having a lazy nanosecond could shift it to either
value <wink>).  Similarly the 25% at 3sort i=17 was a meaningless change
from 0.05 to 0.04.  However, almost all the "meaningless changes" were
in the same direction, which is good.  The before-and-after times for
*sort are clearest:

before after
  0.18  0.16
  0.25  0.23
  0.54  0.50
  1.18  1.11
  2.57  2.44
  5.58  5.30
2002-08-04 17:47:26 +00:00
Tim Peters 6bdbc9e0b1 SF bug 590366: Small typo in listsort:ParseTuple
The PyArg_ParseTuple() error string still said "msort".  Changed to "sort".
2002-08-03 02:28:24 +00:00
Tim Peters a64dc245ac Replaced samplesort with a stable, adaptive mergesort. 2002-08-01 02:13:36 +00:00
Michael W. Hudson 56796f672f Fix for
[ 587875 ] crash on deleting extended slice

The array code got simpler, always a good thing!
2002-07-29 14:35:04 +00:00
Martin v. Löwis 673c0a2247 Patch #574867: Correct list.extend docstring. 2002-07-28 16:35:57 +00:00
Tim Peters 330f9e9581 More sort cleanup: Moved the special cases from samplesortslice into
listsort.  If the former calls itself recursively, they're a waste of
time, since it's called on a random permutation of a random subset of
elements.  OTOH, for exactly the same reason, they're an immeasurably
small waste of time (the odds of finding exploitable order in a random
permutation are ~= 0, so the special-case loops looking for order give
up quickly).  The point is more for conceptual clarity.
Also changed some "assert comments" into real asserts; when this code
was first written, Python.h didn't supply assert.h.
2002-07-19 07:05:44 +00:00
Tim Peters 0fe977c4a9 binarysort() cleanup: Documented the key invariants, explained why they
imply this is a stable sort, and added some asserts.
2002-07-19 06:12:32 +00:00
Tim Peters 326b44871e listreverse(): Don't call the new reverse_slice unless the list
has something in it (else ob_item may be a NULL pointer).
2002-07-19 04:04:16 +00:00
Tim Peters a8c974c157 Cleanup yielding a small speed boost: before rich comparisons were
introduced, list.sort() was rewritten to use only the "< or not <?"
distinction.  After rich comparisons were introduced, docompare() was
fiddled to translate a Py_LT Boolean result into the old "-1 for <,
0 for ==, 1 for >" flavor of outcome, and the sorting code was left
alone.  This left things more obscure than they should be, and turns
out it also cost measurable cycles.

So:  The old CMPERROR novelty is gone.  docompare() is renamed to islt(),
and now has the same return conditinos as PyObject_RichCompareBool.  The
SETK macro is renamed to ISLT, and is even weirder than before (don't
complain unless you want to maintain the sort code <wink>).

Overall, this yields a 1-2% speedup in the usual (no explicit function
passed to list.sort()) case when sorting arrays of floats (as sortperf.py
does).  The boost is higher for arrays of ints.
2002-07-19 03:30:57 +00:00
Tim Peters 3b01a1217f Trimmed trailing whitespace. 2002-07-19 02:35:45 +00:00
Tim Peters 8e2e7ca330 Cleanup: Define one internal utility for reversing a list slice, and
use that everywhere.
2002-07-19 02:33:08 +00:00
Jeremy Hylton 938ace69a0 staticforward bites the dust.
The staticforward define was needed to support certain broken C
compilers (notably SCO ODT 3.0, perhaps early AIX as well) botched the
static keyword when it was used with a forward declaration of a static
initialized structure.  Standard C allows the forward declaration with
static, and we've decided to stop catering to broken C compilers.  (In
fact, we expect that the compilers are all fixed eight years later.)

I'm leaving staticforward and statichere defined in object.h as
static.  This is only for backwards compatibility with C extensions
that might still use it.

XXX I haven't updated the documentation.
2002-07-17 16:30:39 +00:00
Guido van Rossum 6b6272c857 Whitespace normalization. 2002-07-16 20:10:23 +00:00
Guido van Rossum 86103ae531 Make StopIteration a sink state. This is done by clearing out the
it_seq field when the end of the list is reached.

Also remove the next() method -- one is supplied automatically by
PyType_Ready() because the tp_iternext slot is set.  That's a good
thing, because the implementation given here was buggy (it never
raised StopIteration).
2002-07-16 20:07:32 +00:00
Guido van Rossum 5086e49a6e Make list_iter() really static. 2002-07-16 15:56:52 +00:00
Tim Peters 58cf361e35 docompare(): Another reasonable optimization from Jonathan Hogg for the
explicit comparison function case:  use PyObject_Call instead of
PyEval_CallObject.  Same thing in context, but gives a 2.4% overall
speedup when sorting a list of ints via list.sort(__builtin__.cmp).
2002-07-15 05:16:13 +00:00
Jeremy Hylton a4b4c3bf05 Don't declare a function with staticforward.
Just declare it static so that lame (BAD_STATIC_FORWARD) compilers
don't see a mismatch between the prototype and the function.
2002-07-13 03:51:17 +00:00
Tim Peters f2a0473350 docompare(): Use PyTuple_New instead of Py_BuildValue to build compare's
arg tuple.  This was suggested on c.l.py but afraid I can't find the msg
again for proper attribution.  For

    list.sort(cmp)

where list is a list of random ints, and cmp is __builtin__.cmp, this
yields an overall 50-60% speedup on my Win2K box.  Of course this is a
best case, because the overhead of calling cmp relative to the cost of
actually comparing two ints is at an extreme.  Nevertheless it's huge
bang for the buck.  An additionak 20-30% can be bought by making the arg
tuple an immortal static (avoiding all but "the first" PyTuple_New), but
that's tricky to make correct since docompare needs to be reentrant.  So
this picks the cherry and leaves the pits for Fred <wink>.

Note that this makes no difference to the

    list.sort()

case; an arg tuple gets built only if the user specifies an explicit
sort function.
2002-07-11 21:46:16 +00:00
Michael W. Hudson 9c14badc5f Fix the bug described in
http://mail.python.org/pipermail/python-dev/2002-June/025461.html

with test cases.

Also includes extended slice support for arrays, which I thought I'd
already checked in but obviously not.
2002-06-19 15:44:15 +00:00
Neal Norwitz 2c2e827029 Missed one use of new PyDoc_STRVAR macro 2002-06-14 02:04:18 +00:00
Neal Norwitz 35fc7606f0 SF #561244 Micro optimizations
Convert loops to memset()s.
2002-06-13 21:11:11 +00:00
Martin v. Löwis 14f8b4cfcb Patch #568124: Add doc string macros. 2002-06-13 20:33:02 +00:00
Guido van Rossum 75a20b19ef Fold remaining long lines. 2002-06-11 12:22:28 +00:00
Michael W. Hudson 5efaf7eac8 This is my nearly two year old patch
[ 400998 ] experimental support for extended slicing on lists

somewhat spruced up and better tested than it was when I wrote it.

Includes docs & tests.  The whatsnew section needs expanding, and arrays
should support extended slices -- later.
2002-06-11 10:55:12 +00:00
Tim Peters 93b2cc4e97 A bogus assert in the new listiter code prevented starting Python in a
debug build.  Repaired that, and rewrote other parts to reduce
long-winded casting.
2002-06-01 05:22:55 +00:00
Raymond Hettinger 14bd6de0ec SF 560736. Optimize list iteration by filling the tp_iter slot. 2002-05-31 21:40:38 +00:00
Neal Norwitz d4e5be5340 Closes: #556025 seg fault when doing list(xrange(1e9))
A MemoryError is now raised when the list cannot be created.
There is a test, but as the comment says, it really only
works for 32 bit systems.  I don't know how to improve
the test for other systems (ie, 64 bit or systems
where the data size != addressable size,
e.g. 64 bit data, but 48 bit addressable memory)
2002-05-22 23:19:17 +00:00
Neil Schemenauer 99b5d28467 PyObject_GC_Del can now be used as a function designator. 2002-04-12 02:44:22 +00:00
Guido van Rossum ff413af605 This is Neil's fix for SF bug 535905 (Evil Trashcan and GC interaction).
The fix makes it possible to call PyObject_GC_UnTrack() more than once
on the same object, and then move the PyObject_GC_UnTrack() call to
*before* the trashcan code is invoked.

BUGFIX CANDIDATE!
2002-03-28 20:34:59 +00:00
Guido van Rossum dbb53d9918 Fix of SF bug #475877 (Mutable subtype instances are hashable).
Rather than tweaking the inheritance of type object slots (which turns
out to be too messy to try), this fix adds a __hash__ to the list and
dict types (the only mutable types I'm aware of) that explicitly
raises an error.  This has the advantage that list.__hash__([]) also
raises an error (previously, this would invoke object.__hash__([]),
returning the argument's address); ditto for dict.__hash__.

The disadvantage for this fix is that 3rd party mutable types aren't
automatically fixed.  This should be added to the rules for creating
subclassable extension types: if you don't want your object to be
hashable, add a tp_hash function that raises an exception.

Also, it's possible that I've forgotten about other mutable types for
which this should be done.
2001-12-03 16:32:18 +00:00
Guido van Rossum 9475a2310d Enable GC for new-style instances. This touches lots of files, since
many types were subclassable but had a xxx_dealloc function that
called PyObject_DEL(self) directly instead of deferring to
self->ob_type->tp_free(self).  It is permissible to set tp_free in the
type object directly to _PyObject_Del, for non-GC types, or to
_PyObject_GC_Del, for GC types.  Still, PyObject_DEL was a tad faster,
so I'm fearing that our pystone rating is going down again.  I'm not
sure if doing something like

void xxx_dealloc(PyObject *self)
{
	if (PyXxxCheckExact(self))
		PyObject_DEL(self);
	else
		self->ob_type->tp_free(self);
}

is any faster than always calling the else branch, so I haven't
attempted that -- however those types whose own dealloc is fancier
(int, float, unicode) do use this pattern.
2001-10-05 20:51:39 +00:00
Tim Peters 52e0717215 Give the internal immutable list type .extend and .pop methods (they
"should have" been added here when they were added to lists).
2001-08-30 06:15:32 +00:00
Neil Schemenauer e83c00efd0 Use new GC API. 2001-08-29 23:54:21 +00:00
Martin v. Löwis e3eb1f2b23 Patch #427190: Implement and use METH_NOARGS and METH_O. 2001-08-16 13:15:00 +00:00
Tim Peters 6d6c1a35e0 Merge of descr-branch back into trunk. 2001-08-02 04:15:00 +00:00
Tim Peters 6ee4234802 SF bug #439104: Tuple richcompares has code-typo.
Symptom:  (1, 2, 3) <= (1, 2) returned 1.
This was already fixed in CVS for tuples, but an isomorphic error was in
the list richcompare code.
2001-07-06 17:45:43 +00:00
Tim Peters a7259597f1 SF bug 433228: repr(list) woes when len(list) big.
Gave Python linear-time repr() implementations for dicts, lists, strings.
This means, e.g., that repr(range(50000)) is no longer 50x slower than
pprint.pprint() in 2.2 <wink>.

I don't consider this a bugfix candidate, as it's a performance boost.

Added _PyString_Join() to the internal string API.  If we want that in the
public API, fine, but then it requires runtime error checks instead of
asserts.
2001-06-16 05:11:17 +00:00
Tim Peters 1af03e98d9 Change list.extend() error msgs and NEWS to reflect that list.extend()
now takes any iterable argument, not only sequences.

NEEDS DOC CHANGES -- but I don't think we settled on a concise way to
say this stuff.
2001-05-26 19:37:54 +00:00
Tim Peters 442914d265 Cruft cleanup: removed the #ifdef'ery in support of compiling to allow
multi-argument list.append(1, 2, 3) (as opposed to .append((1,2,3))).
2001-05-26 05:50:03 +00:00
Tim Peters 65b8b84839 roundupsize() and friends: fiddle over-allocation strategy for list
resizing.

Accurate timings are impossible on my Win98SE box, but this is obviously
faster even on this box for reasonable list.append() cases.  I give
credit for this not to the resizing strategy but to getting rid of integer
multiplication and divsion (in favor of shifting) when computing the
rounded-up size.

For unreasonable list.append() cases, Win98SE now displays linear behavior
for one-at-time appends up to a list with about 35 million elements.  Then
it dies with a MemoryError, due to fatally fragmented *address space*
(there's plenty of VM available, but by this point Win9X has broken user
space into many distinct heaps none of which has enough contiguous space
left to resize the list, and for whatever reason Win9x isn't coalescing
the dead heaps).  Before the patch it got a MemoryError for the same
reason, but once the list reached about 2 million elements.

Haven't yet tried on Win2K but have high hopes extreme list.append()
will be much better behaved now (NT & Win2K didn't fragment address space,
but suffered obvious quadratic-time behavior before as lists got large).

For other systems I'm relying on common sense:  replacing integer * and /
by << and >> can't plausibly hurt, the number of function calls hasn't
changed, and the total operation count for reasonably small lists is about
the same (while the operations are cheaper now).
2001-05-26 05:28:40 +00:00
Guido van Rossum b86c549c7c Fix core dump whenever PyList_Reverse() was called.
This fixes SF bug #132008, reported by Warren J. Hack.

The copyright for this patch (and this patch only) belongs to CNRI, as
part of the (yet to be issued) 1.6.1 release.

This is now checked into the HEAD branch.  Tim will check in a test
case to check for this specific bug, and an assertion in
PyArgs_ParseTuple() to catch similar bugs in the future.
2001-02-12 22:06:02 +00:00
Guido van Rossum 65e1cea6e3 Convert to rich comparisons:
- sort's docompare() calls RichCompare(Py_LT).

- list_contains(), list_index(), listcount(), listremove() call
  RichCompare(Py_EQ).

- Get rid of list_compare(), in favor of new list_richcompare().  The
  latter does some nice shortcuts, like when == or != is requested, it
  first compares the lengths for trivial accept/reject.  Then it goes
  over the items until it finds an index where the items differe; then
  it does more shortcut magic to minimize the number of additional
  comparisons.

- Aligned the comments for large struct initializers.
2001-01-17 22:11:59 +00:00
Jeremy Hylton db60bb5aad fix leak 2001-01-03 22:32:16 +00:00
Tim Peters 0e76ab2ecc Use METH_VARARGS instead of "1" in list method table. 2000-12-13 22:35:46 +00:00
Fred Drake d5fadf75e4 Rationalize use of limits.h, moving the inclusion to Python.h.
Add definitions of INT_MAX and LONG_MAX to pyport.h.
Remove includes of limits.h and conditional definitions of INT_MAX
and LONG_MAX elsewhere.

This closes SourceForge patch #101659 and bug #115323.
2000-09-26 05:46:01 +00:00
Guido van Rossum 8586991099 REMOVED all CWI, CNRI and BeOpen copyright markings.
This should match the situation in the 1.6b1 tree.
2000-09-01 23:29:29 +00:00
Thomas Wouters e289e0bd0c Support for the in-place operations introduced by augmented assignment. Only
the list object supports this currently, but other candidates are
gladly accepted (like arraymodule and such.)
2000-08-24 20:08:19 +00:00
Jack Jansen e979160f5e Added include for limits.h 2000-08-22 21:51:22 +00:00
Trent Mick a584664134 Check for overflow in list object insertion and raise OverflowError.
see: http://www.python.org/pipermail/python-dev/2000-August/014971.html
2000-08-13 22:47:45 +00:00
Thomas Wouters 334fb8985b Use 'void' directly instead of the ANY #define, now that all code is ANSI C.
Leave the actual #define in for API compatibility.
2000-07-25 12:56:38 +00:00
Vladimir Marangozov 467a67e74d Fix in PyList_New(). With GC enabled and when out of memory,
free() the GC pointer, not the object pointer.
2000-07-15 03:31:31 +00:00
Jeremy Hylton 03657cfdb0 replace PyXXX_Length calls with PyXXX_Size calls 2000-07-12 13:05:33 +00:00
Fred Drake a2f5511941 ANSI-fication of the sources. 2000-07-09 15:16:51 +00:00
Guido van Rossum 4cc6ac7b87 Neil Schemenauer: small fixes for GC 2000-07-01 01:00:38 +00:00
Guido van Rossum ffcc3813d8 Change copyright notice - 2nd try. 2000-06-30 23:58:06 +00:00
Guido van Rossum fd71b9e9d4 Change copyright notice. 2000-06-30 23:50:40 +00:00
Jeremy Hylton c5007aa5c3 final patches from Neil Schemenauer for garbage collection 2000-06-30 05:02:53 +00:00
Jeremy Hylton d08b4c4524 part 2 of Neil Schemenauer's GC patches:
This patch modifies the type structures of objects that
participate in GC.  The object's tp_basicsize is increased when
GC is enabled.  GC information is prefixed to the object to
maintain binary compatibility.  GC objects also define the
tp_flag Py_TPFLAGS_GC.
2000-06-23 19:37:02 +00:00
Jeremy Hylton 8caad49c30 Round 1 of Neil Schemenauer's GC patches:
This patch adds the type methods traverse and clear necessary for GC
implementation.
2000-06-23 14:18:11 +00:00
Andrew M. Kuchling 74042d6e5d Patch from /F:
this patch introduces PySequence_Fast and PySequence_Fast_GET_ITEM,
and modifies the list.extend method to accept any kind of sequence.
2000-06-18 18:43:14 +00:00
Fred Drake 56780257c6 Thomas Wouters <thomas@xs4all.net>:
The following patch adds "sq_contains" support to rangeobject, and enables
the already-written support for sq_contains in listobject and tupleobject.

The rangeobject "contains" code should be a bit more efficient than the
current default "in" implementation ;-) It might not get used much, but it's
not that much to add.

listobject.c and tupleobject.c already had code for sq_contains, and the
proper struct member was set, but the PyType structure was not extended to
include tp_flags, so the object-specific code was not getting called (Go
ahead, test it ;-). I also did this for the immutable_list_type in
listobject.c, eventhough it is probably never used. Symmetry and all that.
2000-06-15 14:50:20 +00:00
Fred Drake 914a2edb24 Improve TypeError exception message for list catenation. 2000-06-01 14:31:03 +00:00
Fred Drake b6a9ada757 Michael Hudson <mwh21@cam.ac.uk>:
Removed PyErr_BadArgument() calls and replaced them with more useful
error messages.
2000-06-01 03:12:13 +00:00
Guido van Rossum b18618dab7 Vladimir Marangozov's long-awaited malloc restructuring.
For more comments, read the patches@python.org archives.
For documentation read the comments in mymalloc.h and objimpl.h.

(This is not exactly what Vladimir posted to the patches list; I've
made a few changes, and Vladimir sent me a fix in private email for a
problem that only occurs in debug mode.  I'm also holding back on his
change to main.c, which seems unnecessary to me.)
2000-05-03 23:44:39 +00:00
Jeremy Hylton 37b1a26c89 add list_contains and tuplecontains: efficient implementations of tp_contains 2000-04-27 21:41:03 +00:00
Guido van Rossum d724b23420 Christian Tismer's "trashcan" patch:
Added wrapping macros to dictobject.c, listobject.c, tupleobject.c,
frameobject.c, traceback.c that safely prevends core dumps
on stack overflow. Macros and functions in object.c, object.h.
The method is an "elevator destructor" that turns cascading
deletes into tail recursive behavior when some limit is hit.
2000-03-13 16:01:29 +00:00
Guido van Rossum ef93b87f1c Added Christian Tismer's patch to allow list.append(a,b,c) back --
with a twist: you have to define NO_STRICT_LIST_APPEND manually
to enable multi-arg append().
2000-03-13 15:41:59 +00:00
Guido van Rossum c00a938be8 OKOK, Greg's right, I should've used the :name option in the argument
format strings.
2000-02-24 21:48:29 +00:00
Guido van Rossum 4aa24f9979 Made all list methods use PyArg_ParseTuple(), for more accurate
diagnostics.

*** INCOMPATIBLE CHANGE: This changes append(), remove(), index(), and
*** count() to require exactly one argument -- previously, multiple
*** arguments were silently assumed to be a tuple.
2000-02-24 15:23:03 +00:00
Guido van Rossum bffd683f73 The rest of the changes by Trent Mick and Dale Nagata for warning-free
compilation on NT Alpha.  Mostly added casts etc.
2000-01-20 22:32:56 +00:00
Guido van Rossum fa71701d46 When deallocating a list, DECREF the items from the end back to the start. 1999-06-09 15:19:34 +00:00
Guido van Rossum 9bcd1d7931 Improve text of some error messages, as suggested by Sean Reifschneider. 1999-04-19 17:44:39 +00:00
Guido van Rossum 3aa23fdd47 Jim Ahlstrom patch: cutoff should be a long for machines with 16-bit
ints.  (In theory, other variables should be widened to long as well,
but this won't ever be needed, since the len of a list is still an
int.)
1999-01-14 19:01:53 +00:00
Barry Warsaw dedf6d6804 listextend(): New method which implements L.extend(L2). 1998-10-09 16:37:25 +00:00
Guido van Rossum 2ccaf6f2f9 Remove a redundant check from list_slice() and list_ass_slice().
Noted by Greg Stein.
1998-10-07 13:24:13 +00:00
Guido van Rossum 3dd7f3fef0 Added doc strings for methods and a new pop() method. 1998-06-30 15:36:32 +00:00
Guido van Rossum 4281258b5f Minor cleanup by Tim after my changes:
+ Took the "list" argument out of the other functions that no longer need
it.  This speeds things up a little more.

+ Small comment changes in accord with that.

+ Exploited the now-safe ability to cache values in the partitioning loop.
Makes no timing difference on my flavor of Pentium, but this machine ran out
of registers 12 iterations ago.  It should yield a small speedup on a RISC
machine, and not hurt in any case.
1998-06-17 14:15:44 +00:00
Guido van Rossum 4c4e7df755 Tim's latest, with some of my changes (also a TP suggestion) added:
instead of testing whether the list changed size after each
comparison, temporarily set the type of the list to an immutable list
type.  This should allow continued use of the list for legitimate
purposes but disallows all operations that can change it in any way.
(Changes to the internals of list items are not caught, of cause;
that's not possible to detect, and it's not necessary to protect the
sort code, either.)
1998-06-16 15:18:28 +00:00
Guido van Rossum a119c0dd5e Tim's revision of the previous patch. He also added some sparts to
the median-of-three code to get a few percent back.
1998-05-29 17:56:32 +00:00
Guido van Rossum ae621ff7b7 Guard against changes in the list size during a compare or sort. 1998-05-28 20:18:46 +00:00
Guido van Rossum 9be628338d Tim's quicksort on May 25. 1998-05-26 15:06:32 +00:00
Guido van Rossum ed7adcff73 Tim's quicksort on May 13. 1998-05-13 21:21:24 +00:00
Guido van Rossum b7057640d1 Tim's quicksort on May 10. 1998-05-13 21:20:49 +00:00
Guido van Rossum e32907df67 Get rid of the unused ifdefed-out old sort code. 1998-04-28 17:54:03 +00:00
Guido van Rossum 82e6a8f80d Quicksort retuned by Tim Peters. 1998-04-28 13:17:56 +00:00
Guido van Rossum fb376dee55 Use Py_Repr{Enter,Leave} to display recursive lists in finite space.
(Jeremy will hardly recognize his patch :-)
1998-04-10 22:47:27 +00:00
Guido van Rossum 044b9dc1d7 Add back some safeguards on the index elements that were lost in the
last patch.  Dave Ascher found a case that dumps core without these:

def myComparison(x,y):
    return cmp(x%3,y%7)

z = range(12)
z.sort(myComparison)
1998-02-25 17:50:03 +00:00
Guido van Rossum 24e62e2c7c Modified quicksort by Raymund Galvin, after studying the GNU libg++
quicksort.  This should be much faster if there are lots of
duplicates, and otherwise at least as good.
1997-12-10 15:14:24 +00:00
Guido van Rossum a27d112213 Rename roundup() to roundupsize(), as there's a macro roundup() in the
sys/types.h header on many systems that may get pulled in (through
WANT_SIGFPE_HANDLER which pulls in signal.h).
1997-08-25 18:36:23 +00:00
Guido van Rossum 5d8123f34a Reordered list of methods to hopefully put the most frequently used
ones near the front.
1997-07-13 03:58:01 +00:00
Guido van Rossum c8b6df9004 PyObject_Compare can raise an exception now. 1997-05-23 00:06:51 +00:00
Guido van Rossum c0b618a2cc Quickly renamed the last directory. 1997-05-02 03:12:38 +00:00
Guido van Rossum 2095d24842 Tweaks to keep the Microsoft compiler quiet. 1997-04-09 19:41:24 +00:00
Guido van Rossum 19700b6a98 Add casts to CMPERROR macro to silence SunPro compiler warnings about
integer overflow in << operator.
1997-03-05 00:45:43 +00:00
Guido van Rossum cc15b42e59 Change comment about MINSIZE -- 10 is optimal for Python. 1996-12-16 03:32:39 +00:00
Guido van Rossum 3176bb1df2 Some more tuning of quicksort: use pointers instead of indexing. 1996-12-11 23:57:39 +00:00
Guido van Rossum 3f236dee3a Added new quicksort implementation, tailored to sorting arrays of
object pointers.  Should be a bit faster than the C library's qsort(),
and doesn't have the prohibition on recursion that Solaris qsort() has
in the threaded version of their C library.

Thanks to discussions with Tim Peters.
1996-12-10 23:55:39 +00:00
Guido van Rossum d266eb460e New permission notice, includes CNRI. 1996-10-25 14:44:06 +00:00
Guido van Rossum 929f1b83ea Use pre-created string objects for most common exceptions
(especially IndexError which is caught by 'for')
1996-08-09 20:51:27 +00:00
Guido van Rossum 1311e3ce73 args to call_object must be tuple or NULL 1995-07-12 02:22:06 +00:00
Guido van Rossum 5fe605889a a few peephole optimizations 1995-03-09 12:12:50 +00:00
Guido van Rossum 295d171650 explicitly init flags in methodlists 1995-02-19 15:55:19 +00:00
Guido van Rossum a46d51d9a4 round up list item counts to improve realloc performance 1995-01-26 22:59:43 +00:00
Jack Jansen 7874d1fe7e Fix NULL dereference in case of out-of-memory condition 1995-01-19 12:09:27 +00:00
Guido van Rossum b0fe3a9312 added reverselist; free recycling bin on error exit 1995-01-17 16:34:45 +00:00
Guido van Rossum ae7bf1a5e7 fix reentrancy bug in slice assignment 1995-01-17 10:21:11 +00:00
Guido van Rossum 6610ad9d6b Added 1995 to copyright message.
floatobject.c: fix hash().
methodobject.c: support METH_FREENAME flag bit.
1995-01-04 19:07:38 +00:00
Guido van Rossum d7047b395e Lots of minor changes. Note for mappingobject.c: the hash table pointer
can now be NULL.
1995-01-02 19:07:15 +00:00
Guido van Rossum 6cd2fe043b Correct problems found by THINK C 6.0 1994-08-29 12:45:32 +00:00
Guido van Rossum a3d78fb268 * posixmodule.c: added set{uid,gid}.
* {tuple,list,mapping,array}object.c: call printobject with 0 for flags
* compile.c (parsestr): use quote instead of '\'' at one crucial point
* arraymodule.c (array_getattr): Added __members__ attribute
1993-11-10 09:23:53 +00:00
Guido van Rossum dc4b93db70 * listobject.c (list_ass_slice): XDECREF instead of DECREF so
setlistslice() can be used to cut the unused part out of a freshly made
  slice (as done by bagof()).  [needed by the next mod!]
* structural changes to bagof(), map() etc.
1993-10-27 14:56:44 +00:00
Sjoerd Mullender a9c3c22c33 * Extended X interface: pixmap objects, colormap objects visual objects,
image objects, and lots of new methods.
* Added counting of allocations and deallocations of builtin types if
  COUNT_ALLOCS is defined.  Had to move calls to NEWREF down in some
  files.
* Bug fix in sorting lists.
1993-10-11 12:54:31 +00:00
Guido van Rossum 1fc238a813 Minor fixes / changes for Mac compatibility. 1993-07-29 08:25:09 +00:00
Guido van Rossum 234f942aef * Added gmtime/localtime/mktime and SYSV timezone globals to timemodule.c.
Added $(SYSDEF) to its build rule in Makefile.
* cgensupport.[ch], modsupport.[ch]: removed some old stuff.  Also
  changed files that still used it...  And made several things static
  that weren't but should have been...  And other minor cleanups...
* listobject.[ch]: add external interfaces {set,get}listslice
* socketmodule.c: fix bugs in new send() argument parsing.
* sunaudiodevmodule.c: added flush() and close().
1993-06-17 12:35:49 +00:00
Guido van Rossum bf80e5407f * stdwinmodule.c: various new commands: setwin{pos,size},
listfontnames, bitmap ops.
* listobject.c: use mkvalue() when possible; avoid weird error when
  calling append() without args.
* modsupport.c: new feature in getargs(): if the format string
  contains a semicolor the string after that is used as the error
  message instead of "bad argument list (format %s)" when there's an
  error.
1993-02-08 15:49:17 +00:00
Guido van Rossum 34679b7661 * Added Fixcprt.py: script to fix copyright message.
* various modules: added 1993 to copyright.
* thread.c: added copyright notice.
* ceval.c: minor change to error message for "+"
* stdwinmodule.c: check for error from wfetchcolor
* config.c: MS-DOS fixes (define PYTHONPATH, use DELIM, use osdefs.h)
* Add declaration of inittab to import.h
* sysmodule.c: added sys.builtin_module_names
* xxmodule.c, xxobject.c: fix minor errors
1993-01-26 13:33:44 +00:00
Guido van Rossum a2b7f40513 * Configure.py: use #!/usr/local/bin/python
* posixmodule.c: move extern function declarations to top
* listobject.c: cmp() arguments must be void* if __STDC__
* Makefile, allobjects.h, panelmodule.c, modsupport.c: get rid of
  strdup() -- it is a portability risk
* Makefile: enclosed ranlib command in parentheses for Sequent Make
  which aborts if the command is not found even if '-' is present
* timemodule.c: time() returns a floating point number, in microsecond
  precision if BSD_TIME is defined.
1993-01-04 09:09:59 +00:00
Guido van Rossum 7066dd75c5 * Makefile: added IMGFILE; moved some stuff around.
* flmodule.c: added some missing functions; changed readonly flags of
  some data members based upon FORMS documentation.
* listobject.c: fixed int/long arg lint bug (bites PC compilers).
* several: removed redundant print methods (repr is good enough).
* posixmodule.c: added (still experimental) process group functions.
1992-09-17 17:54:56 +00:00
Guido van Rossum ba3690cd09 Remove outdated warning in comments. 1992-09-03 20:44:36 +00:00
Guido van Rossum 1e28e5e596 * renamed malloc.h mymalloc.h, and added MALLARG as the type of the
argument to malloc() (size_t or unsigned int)

* listobject.c: check for overflow of the size of the object,
  so things like range(0x7fffffff) will raise MemoryError instead
  of calling malloc() with -4 (and then crashing -- malloc's fault)
1992-08-19 16:46:30 +00:00
Guido van Rossum ff4949eeee * Makefile: cosmetics
* socketmodule.c: get rid of makepair(); fix makesocketaddr to fix
  broken recvfrom()
* socketmodule: get rid of getStrarg()
* ceval.h: move eval_code() to new file eval.h, so compile.h is no
  longer needed.
* ceval.c: move thread comments to ceval.h; always make save/restore
  thread functions available (for dynloaded modules)
* cdmodule.c, listobject.c: don't include compile.h
* flmodule.c: include ceval.h
* import.c: include eval.h instead of ceval.h
* cgen.py: add forground(); noport(); winopen(""); to initgl().
* bltinmodule.c, socketmodule.c, fileobject.c, posixmodule.c,
  selectmodule.c:
  adapt to threads (add BGN/END SAVE macros)
* stdwinmodule.c: adapt to threads and use a special stdwin lock.
* pythonmain.c: don't include getpythonpath().
* pythonrun.c: use BGN/END SAVE instead of direct calls; also more
  BGN/END SAVE calls etc.
* thread.c: bigger stack size for sun; change exit() to _exit()
* threadmodule.c: use BGN/END SAVE macros where possible
* timemodule.c: adapt better to threads; use BGN/END SAVE; add
  longsleep internal function if BSD_TIME; cosmetics
1992-08-05 19:58:53 +00:00
Guido van Rossum e10a19ea6d listobject.c: added optional cmp function to list.sort(). 1992-08-03 19:05:37 +00:00
Guido van Rossum bab9d03855 Copyright for 1992 added 1992-04-05 14:26:55 +00:00
Guido van Rossum fa3da8aa7c Include modsupport.h for getargs(). 1992-01-27 16:53:23 +00:00
Guido van Rossum 32dffaa016 Fix assignment of a list to a slice of itself. 1991-12-24 13:27:34 +00:00
Guido van Rossum 87e7ea72a6 Use new exceptions. 1991-12-10 14:00:03 +00:00
Guido van Rossum e6f7d18e6b Added count() method.
Changed some conditional INCREFs into XINCREFs.
1991-10-20 20:20:40 +00:00
Guido van Rossum 909336104b printobject now returns an error code 1991-06-07 16:10:43 +00:00
Guido van Rossum bfe14c5c92 Add warning about Lambert's bug. 1991-04-16 08:41:06 +00:00
Guido van Rossum 4a450d06c7 Swapped list_ass_item and list_ass_slice to satisfy Standard C. 1991-04-03 19:05:18 +00:00
Guido van Rossum ed98d48027 Added repeat (for list*integet).
Added methods remove(), reverse() and index().
1991-03-06 13:07:53 +00:00
Guido van Rossum f70e43a073 Added copyright notice. 1991-02-19 12:39:46 +00:00
Guido van Rossum 3f5da24ea3 "Compiling" version 1990-12-20 15:06:42 +00:00
Guido van Rossum 84c76f52af Added external interface to sort a list. 1990-10-30 13:32:20 +00:00
Guido van Rossum 2a9096b5f9 New errors. 1990-10-21 22:15:08 +00:00
Guido van Rossum 85a5fbbdfe Initial revision 1990-10-14 12:07:46 +00:00