Commit Graph

59 Commits

Author SHA1 Message Date
Tim Peters 9905b943f7 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
refactoring to get all the duplicates of this delicate code out of the
cPickle and struct modules.
2003-03-20 20:53:32 +00:00
Tim Peters d50ade68ec SF bug 705836: struct.pack of floats in non-native endian order
pack_float, pack_double, save_float:  All the routines for creating
IEEE-format packed representations of floats and doubles simply ignored
that rounding can (in rare cases) propagate out of a long string of
1 bits.  At worst, the end-off carry can (by mistake) interfere with
the exponent value, and then unpacking yields a result wrong by a factor
of 2.  In less severe cases, it can end up losing more low-order bits
than intended, or fail to catch overflow *caused* by rounding.

Bugfix candidate, but I already backported this to 2.2.

In 2.3, this code remains in severe need of refactoring.
2003-03-20 18:32:13 +00:00
Guido van Rossum 960bc5490b (Most of) SF patch 601369 (Christos Georgiou): obmalloc,structmodule:
64bit, big endian (issue 2 only).

This adds a bunch of memcpy calls via a temporary variable to avoid
alignment errors.  That's needed for some platforms.
2002-09-03 18:42:21 +00:00
Mark Hammond fe51c6d66e Excise DL_EXPORT/DL_IMPORT from Modules/*. Required adding a prototype
for Py_Main().

Thanks to Kalle Svensson and Skip Montanaro for the patches.
2002-08-02 02:27:13 +00:00
Martin v. Löwis 14f8b4cfcb Patch #568124: Add doc string macros. 2002-06-13 20:33:02 +00:00
Neal Norwitz 187ae56166 Get rid of more PyArg_Parse & METH_OLDARGS.
PyArg_Parse( "s" )  -> PyString_AsString
  PyArg_Parse( "t#" ) -> PyString_AsStringAndSize
2002-04-02 18:17:57 +00:00
Fred Drake 2eeec9bde5 Fix typo. 2002-02-14 07:16:30 +00:00
Fred Drake 78f6c867ae Use PyModule_AddObject() instead of accessing the module dict directly. 2002-02-14 07:11:23 +00:00
Guido van Rossum e2ae77b8b8 SF patch #474590 -- RISC OS support 2001-10-24 20:42:55 +00:00
Tim Peters 0891ac017d The 'p' (Pascal string) pack code acts unreasonably when the string size
and count exceed 255.  Changed to preserve as much of the string as
possible (instead of count%256 characters).
2001-09-15 02:35:15 +00:00
Tim Peters 3dac559299 SF bug #442520: test_struct fails on SPARC.
The ob_sval member of a string object isn't necessarily aligned to better
than a native long, so the new "q" and "Q" struct codes can't get away w/
casting tricks on platforms where LONG_LONG requires stricter-than-long
alignment.  After I thought of a few elaborate workarounds, Guido bashed
me over the head with the obvious memcpy approach, herewith implemented.
2001-07-18 20:47:31 +00:00
Tim Peters da9c5b35a3 The new {b,l}p_{u,}longlong() didn't check get_pylong()'s return for NULL.
Repaired that, and added appropriate tests for it to test_struct.py.
2001-06-13 01:26:35 +00:00
Tim Peters 7a3bfc3a47 Added q/Q standard (x-platform 8-byte ints) mode in struct module.
This completes the q/Q project.

longobject.c _PyLong_AsByteArray:  The original code had a gross bug:
the most-significant Python digit doesn't necessarily have SHIFT
significant bits, and you really need to count how many copies of the sign
bit it has else spurious overflow errors result.

test_struct.py:  This now does exhaustive std q/Q testing at, and on both
sides of, all relevant power-of-2 boundaries, both positive and negative.

NEWS:  Added brief dict news while I was at it.
2001-06-12 01:22:22 +00:00
Tim Peters 2d4e077f23 Trimmed trailing whitespace. 2001-06-11 16:57:33 +00:00
Tim Peters 3023f78819 Simplify some convolution by simply not recognizing 'q' and 'Q' at all
in native mode on platforms that don't HAVE_LONG_LONG.
2001-06-11 16:51:56 +00:00
Tim Peters be80085514 Make clear in the docstring that "std" applies to both size and alignment,
not just to alignment.  Spotted by Guido.

Bugfix candidate.
2001-06-11 16:45:33 +00:00
Tim Peters 7b9542a3f7 Initial support for 'q' and 'Q' struct format codes: for now, only in
native mode, and only when config #defines HAVE_LONG_LONG.  Standard mode
will eventually treat them as 8-byte ints across all platforms, but that
likely requires a new set of routines in longobject.c first (while
sizeof(long) >= 4 is guaranteed by C, there's nothing in C we can rely
on x-platform to hold 8 bytes of int, so we'll have to roll our own;
I'm thinking of a simple pair of conversion functions, Python long
to/from sized vector of unsigned bytes; that may be useful for GMP
conversions too; std q/Q would call them with size fixed at 8).

test_struct.py:  In addition to adding some native-mode 'q' and 'Q' tests,
got rid of unused code, and repaired a non-portable assumption about
native sizeof(short) (it isn't 2 on some Cray boxes).

libstruct.tex:  In addition to adding a bit of 'q'/'Q' docs (more needed
later), removed an erroneous footnote about 'I' behavior.
2001-06-10 23:40:19 +00:00
Tim Peters f0e717bdb1 Repair portability of sign extension when reading signed ints on boxes
where sizeof(long)==8.  This *was* broken on boxes where signed right
shifts didn't sign-extend, but not elsewhere.  Unfortunately, apart
from the Cray T3E I don't know of such a box, and Guido has so far
refused to buy me any Cray machines for home Python testing <wink>.

More immediately interesting would be if someone could please test
this on *any* sizeof(long)==8 box, to make sure I didn't break it.
2001-04-08 23:39:38 +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
Martin v. Löwis 2af72d5d6d Use symbolic constants for allowable short ranges. 2000-09-15 08:10:33 +00:00
Martin v. Löwis 66de5497c5 Check range for bytes and shorts. Closes bug #110845. 2000-09-15 07:31:57 +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
Peter Schneider-Kamp 7e01890986 merge Include/my*.h into Include/pyport.h
marked my*.h as obsolete
2000-07-31 15:28:04 +00:00
Thomas Wouters f3f33dcf03 Bunch of minor ANSIfications: 'void initfunc()' -> 'void initfunc(void)',
and a couple of functions that were missed in the previous batches. Not
terribly tested, but very carefully scrutinized, three times.

All these were found by the little findkrc.py that I posted to python-dev,
which means there might be more lurking. Cases such as this:

long
func(a, b)
	long a;
	long b; /* flagword */
{

and other cases where the last ; in the argument list isn't followed by a
newline and an opening curly bracket. Regexps to catch all are welcome, of
course ;)
2000-07-21 06:00:07 +00:00
Peter Schneider-Kamp 41c36ffe83 ANSI-fication 2000-07-10 12:29:26 +00:00
Tim Peters dbd9ba6a6c Nuke all remaining occurrences of Py_PROTO and Py_FPROTO. 2000-07-09 03:09:57 +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
Fred Drake 137507ea03 Michael Hudson <mwh21@cam.ac.uk>:
Removed PyErr_BadArgument() calls and replaced them with more useful
error messages.
2000-06-01 02:02:46 +00:00
Guido van Rossum 43713e5a28 Massive patch by Skip Montanaro to add ":name" to as many
PyArg_ParseTuple() format string arguments as possible.
2000-02-29 13:59:29 +00:00
Guido van Rossum 3886bb6997 Add DL_EXPORT() to all modules that could possibly be used
on BeOS or Windows.
1998-12-04 18:50:17 +00:00
Guido van Rossum 78694d970f Patches from Greg Stein to support 'P' format in struct module's
native format, as void* (translated to Python int or long).
Also adds PyLong_FromVoidPtr and PyLong_AsVoidPtr to longobject.c.
1998-09-18 14:14:13 +00:00
Guido van Rossum 39ef2274a3 Unsigned 1 and 2 byte sized formats shouldn't result in long integer values! 1998-06-29 04:00:40 +00:00
Fred Drake d3dbb38e98 get_long(): Use PyErr_ExceptionMatches(...) instead of PyErr_Occurred(...). 1998-05-28 04:35:49 +00:00
Guido van Rossum 730806d3d9 Make new gcc -Wall happy 1998-04-10 22:27:42 +00:00
Guido van Rossum 9897f0f847 Oops, left in a non-standard multi-line doc string that GCC finds okay
but other compilers don't like.
1997-12-21 06:46:20 +00:00
Guido van Rossum 414fd4843a Added doc strings, suggested by Charles G. Waldman (but massaged quite a bit). 1997-12-19 04:24:24 +00:00
Guido van Rossum 8f3c812e22 Fix due to Bill Noon for problem discovered by Ken Manheimer: packing
0.0 as float or double would yield the representation for 1.0!
1997-11-04 17:12:33 +00:00
Guido van Rossum 0cb96de269 Apply two changes, systematically:
(1) Use PyErr_NewException("module.class", NULL, NULL) to create the
    exception object.

(2) Remove all calls to Py_FatalError(); instead, return or
    ignore the errors -- the import code now checks PyErr_Occurred()
    after calling a module's init function, so it's no longer a
    fatal error for the initialization to fail.

Also did some small cleanups, e.g. removed unnecessary test for
"already initialized" from initfpectl(), and unified
initposix()/initnt().

I haven't checked this very thoroughly, so while the changes are
pretty trivial -- beware of untested code!
1997-10-01 04:29:29 +00:00
Guido van Rossum 9eb671fac3 Contribution by Hannu Krosing (with some changes).
Added 'p' format character for Pascal string (i.e. leading length
byte).  This uses the count prefix line 's' does, except that the
count includes the length byte; i.e. '10p' takes 10 bytes packed but
has space for a length byte and 9 data bytes.
1997-09-05 07:08:39 +00:00
Guido van Rossum e20aef574a Ignore whitespace between formats (not internal to a count+format). 1997-08-26 20:39:54 +00:00
Guido van Rossum 7844e38a98 Keep Microsoft VC happy. 1997-04-11 20:44:04 +00:00
Guido van Rossum 6c87ecaff1 Changed the ``add/sub_offset'' hacks for dealing with C's unsigned
int/long types, and use the new PyLong_FromUnsignedLong() and
PyLong_AsUnsignedLong() interfaces instead.

Semantic change: the 'I' format will now always return a long int.
1997-01-03 19:08:16 +00:00
Guido van Rossum b9d338cbfb Fill pad bytes with zeros (fixing a bug dating from the very first version!). 1997-01-03 15:40:33 +00:00
Barry Warsaw b9a781e177 Scratch the ears of gcc -Wall. 1997-01-03 00:26:28 +00:00
Guido van Rossum 4ccc531f34 Ok, ok, I've fixed gradual underflow on packing too.
Still don't know what to do with Inf/NaN, so I raise an exception on
pack(), and something random decided by ldexp() will happen on
unpack().
1997-01-02 23:23:20 +00:00
Guido van Rossum 07ef655222 Oops -- unpack float/double didn't do the right thing if e==0. 1997-01-02 22:31:07 +00:00
Guido van Rossum 74679b455f Support float and double in non-native formats.
These use the ANSI/IEEE standard, which is also used by XDR;
so the _xdr module may become obsolete.
1997-01-02 22:21:36 +00:00
Guido van Rossum 60c50614e1 Added better handling of unsigned longs -- a Python long returned by
unpack('L', ...) is now acceptable to pack('L', ...).
1996-12-31 16:29:52 +00:00
Guido van Rossum 3aa27fd315 Fix the first bugs... treatment of 0 count was wrong, and memchr()
should be memset().
1996-12-31 02:10:45 +00:00