Commit Graph

52 Commits

Author SHA1 Message Date
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 a12c7a7620 Add PyDict_Copy() function to C API for dicts. It returns a new
dictionary that contains the same key/value pairs as p.
2000-03-30 22:27:31 +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
Fred Drake 52fccfda5b dict_has_key(): Accept only one parameter. PR#210 reported by
Andreas Jung <ajung@sz-sb.de>.
2000-02-23 15:47:16 +00:00
Guido van Rossum 2bc137909d Vladimir Marangozov contributed updated comments. 1999-03-24 19:06:42 +00:00
Guido van Rossum f05fc716d1 Remove dead code discovered by Vladimir Marangozov. 1998-11-16 22:46:30 +00:00
Guido van Rossum c1c7b1a699 Slight rearrangement of code in lookdict() by Vladimir Marangozov, to
make a common case slightly faster.
1998-10-06 16:01:14 +00:00
Guido van Rossum 0fd00334c6 Avoid using calloc(). This triggered an obscure bug on multiprocessor
Sparc Solaris 2.6 (fully patched!) that I don't want to dig into, but
which I suspect is a bug in the multithreaded malloc library that only
shows up when run on a multiprocessor.  (The program wasn't using
threads, it was just using the multithreaded C library.)
1998-07-16 15:06:13 +00:00
Guido van Rossum 474b19e2ab Make sure that PyDict_GetItem[String]() *never* raises an exception.
If the argument is not a dictionary, simply return NULL.  If the
hash() on the key fails, clear the error.
1998-05-14 01:00:51 +00:00
Guido van Rossum 255443b720 Use Py_Repr{Enter,Leave} to display recursive dictionaries in finite space.
(Jeremy will hardly recognize his patch :-)
1998-04-10 22:47:14 +00:00
Guido van Rossum 6fcfa72c63 Correct Barry's fix -- take care of {}.get(0). 1997-10-20 20:10:00 +00:00
Barry Warsaw 320ac331d1 dict_get(): Fixed a couple of stupid mistakes which caused crashes.
Also got rid of some unnecessary code.
1997-10-20 17:26:25 +00:00
Barry Warsaw c38c5da5d0 dict_get(): New method for item access with different semantics than
__getitem__().  This method never raises an exception; if the key is
not in the dictionary, the second (optional) argument is returned.  If
the second argument is not provided and the key is missing, None is
returned.

mapp_methods: added "get" method.
1997-10-06 17:49:20 +00:00
Guido van Rossum 4f3bf1e383 Don't intern the key string for getitem and delitem. 1997-09-29 23:31:11 +00:00
Guido van Rossum fd7a0b871f Made lookdict nearly twice as fast, resulting in a 5% overall
improvement of pystone.  Vladimir Marangozov.
1997-08-18 21:52:47 +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 a8d5131d57 Renamed dict.absorb() (too spungy) to dict.update(). 1997-06-02 17:13:37 +00:00
Guido van Rossum e3f5b9c8d1 Added dict.absorb() and dict.copy(). 1997-05-28 19:15:28 +00:00
Guido van Rossum 5b2121b25f PyObject_Compare can now return an error. Unfortunately, there are a
few places where we don't know how to test for them without losing
speed; don't know yet how to handle that.
1997-05-23 00:01:41 +00:00
Guido van Rossum 037b2205e8 Moved PyObject_{Get,Set}Attr to object.c.
Fixed two 'return NULL' that should be 'return -1'.
1997-05-20 18:35:19 +00:00
Guido van Rossum 3cca24570e Got rid of all the last_name_* bogosities. I don't think the
complexity saved much any more.  A simple benchmark (grail) showed
that there were 3 times as many misses as hits, and the same number of
times again the code was bypassed altogether due to the existence of
setattro/getattro.
1997-05-16 14:23:33 +00:00
Guido van Rossum a9e7a81137 Renamed from mappingobject.c to dictobject.c.
(Sorry Jack, all your projects will have to be changed again. :-( )
1997-05-13 21:02:11 +00:00
Guido van Rossum c0b618a2cc Quickly renamed the last directory. 1997-05-02 03:12:38 +00:00
Guido van Rossum 3648884490 (Jack:) Align mapping entries to 4-words if USE_CACHE_ALIGNED is defined. 1997-04-11 19:14:07 +00:00
Guido van Rossum 2095d24842 Tweaks to keep the Microsoft compiler quiet. 1997-04-09 19:41:24 +00:00
Guido van Rossum fb8f1cadb2 Add clear() method to dictionary objects. 1997-03-21 21:55:12 +00:00
Guido van Rossum efb4609c4a Small lookmapping nits:
- remove bogus initialization using uninitialized i
- derive initial incr from hash
- copy mp->ma_table into a local variable
1997-01-29 15:53:56 +00:00
Guido van Rossum 9e5656ca3f Final three poly table entries corrected by Tim Peters.
Reindented the whole table.
1997-01-29 04:45:16 +00:00
Guido van Rossum 16e93a8d59 Changed the lookup algorithm again, based on Reimer Behrends's post.
The table size is now constrained to be a power of two, and we use a
variable increment based on GF(2^n)-{0} (not that I have the faintest
idea what that is :-) which helps avoid the expensive '%' operation.

Some of the entries in the table of polynomials have been modified
according to a post by Tim Peters.
1997-01-28 00:00:11 +00:00
Guido van Rossum ca756f2a1d Forget keeping track of whether a dictionary contains all interned
string keys.  Just doing a pointer compare before the string compare
(in fact before the hash compare!) is just as fast.
1997-01-23 19:39:29 +00:00
Guido van Rossum 2a61e7428d String interning. 1997-01-18 07:55:05 +00:00
Guido van Rossum 7d18159614 Rewrote lookmapping() according to suggestions by Jyrki Alakuijala. 1997-01-16 21:06:45 +00:00
Guido van Rossum a0a69b8b42 Experimental new implementation of dictionary comparison. This
defines that a shorter dictionary is always smaller than a longer one.
For dictionaries of the same size, the smallest differing element
determines the outcome (which yields the same results as before,
without explicit sorting).
1996-12-05 21:55:55 +00:00
Guido van Rossum d266eb460e New permission notice, includes CNRI. 1996-10-25 14:44:06 +00:00
Guido van Rossum d8eb1b340f Support for tp_getattro, tp_setattro (Sjoerd) 1996-08-09 20:52:03 +00:00
Guido van Rossum 310968dc06 Speedup suggested by Sjoerd 1996-07-30 16:45:31 +00:00
Guido van Rossum 992ded8f12 fix free memory reads in dictlookup et al 1995-12-08 01:16:31 +00:00
Guido van Rossum 5fe605889a a few peephole optimizations 1995-03-09 12:12:50 +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 efc8713428 * Objects/mappingobject.c (mappingremove): don't call
lookmapping() for empty dictionary
1995-01-02 19:42:39 +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 1d5735e846 Merge back to main trunk 1994-08-30 08:27:36 +00:00
Guido van Rossum 8732d6aeea Fix lay-out of previous fix. 1993-11-23 17:54:03 +00:00
Guido van Rossum b376a4ad18 * timemodule.c: Add hack for Solaris 2.
* posixmodule.c: don't prototype getcwd() -- it's not portable...
* mappingobject.c: double-check validity of last_name_char in
  dict{lookup,insert,remove}.
* arraymodule.c: need memmove only for non-STDC Suns.
* Makefile: comment out HTML_LIBS and XT_USE by default
* pythonmain.c: don't prototype getopt() -- it's not standardized
* socketmodule.c: cast flags arg to {get,set}sockopt() and addrbuf arg to
  recvfrom() to (ANY*).
* pythonrun.c (initsigs): fix prototype, make it static
* intobject.c (LONG_BIT): only #define it if not already defined
* classobject.[ch]: remove all references to unused instance_convert()
* mappingobject.c (getmappingsize): Don't return NULL in int function.
1993-11-23 17:53:17 +00:00
Guido van Rossum 52f2c05401 * parsermodule.c, Makefile, config.c: rudimentary interface to the Python
parser.
* mappingobject.c (lookmapping): 'freeslot' was never used due to a bug in
  the code.
1993-11-10 12:53:24 +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 4199facacd Added getmappingsize(). (Needed by previous checkin of posixmodule.c) 1993-11-05 10:18:44 +00:00
Sjoerd Mullender 3bb8a05947 Several optimizations and speed improvements.
cstubs: Use Matrix type instead of float[4][4].
1993-10-22 12:04:32 +00:00
Guido van Rossum 1fc238a813 Minor fixes / changes for Mac compatibility. 1993-07-29 08:25:09 +00:00
Guido van Rossum 25831652fd Several changes in one:
(1) dictionaries/mappings now have attributes values() and items() as
well as keys(); at the C level, use the new function mappinggetnext()
to iterate over a dictionary.

(2) "class C(): ..." is now illegal; you must write "class C: ...".

(3) Class objects now know their own name (finally!); and minor
improvements to the way how classes, functions and methods are
represented as strings.

(4) Added an "access" statement and semantics.  (This is still
experimental -- as long as you don't use the keyword 'access' nothing
should be changed.)
1993-05-19 14:50:45 +00:00