Commit Graph

51 Commits

Author SHA1 Message Date
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
Guido van Rossum f7e6b4b388 Pretty much rewritten to fulfull several long-standing wishes:
-- The whole implementation is now more table-driven.

-- Unsigned integers.  Format characters 'B', 'H', 'I' and 'L'
mean unsigned byte, short, int and long.  For 'I' and 'L', the return
value is a Python long integer if a Python plain integer can't
represent the required range (note: this is dependent on the size of
the relevant C types only, not of the sign of the actual value).

-- A new format character 's' packs/unpacks a string.  When given a
count prefix, this is the size of the string, not a repeat count like
for the other format characters; e.g. '10s' means a single 10-byte
string, while '10c' means 10 characters.  For packing, the string is
truncated or padded with null bytes as appropriate to make it fit.
For unpacking, the resulting string always has exactly the specified
number of bytes.  As a special case, '0s' means a single, empty
string (while '0c' means 0 characters).

-- Various byte order options.  The first character of the format
string determines the byte order, size and alignment, as follows:

First character		Byte order		size and alignment

	'@'		native			native
	'='		native			standard
	'<'		little-endian		standard
	'>'		big-endian		standard
	'!'		network (= big-endian)	standard

If the first character is not one of these, '@' is assumed.

Native byte order is big-endian or little-endian, depending on the
host system (e.g. Motorola and Sun are big-endian; Intel and DEC are
little-endian).

Native size and alignment are determined using the C compiler's sizeof
expression.  This is always combined with native byte order.

Standard size and alignment are as follows: no alignment is required
for any type (so you have to use pad bytes); short is 2 bytes; int and
long are 4 bytes.  In this mode, there is no support for float and
double.

Note the difference between '@' and '=': both use native byte order,
but the size and alignment of the latter is standardized.

The form '!' is available for those poor souls who can't remember
whether network byte order is big-endian or little-endian.

There is no way to indicate non-native byte order (i.e. force
byte-swapping); use the appropriate choice of '<' or '>'.
1996-12-31 01:41:25 +00:00
Barry Warsaw 30695fa3cd Renamed. 1996-12-12 23:32:31 +00:00
Guido van Rossum d266eb460e New permission notice, includes CNRI. 1996-10-25 14:44:06 +00:00
Jack Jansen 971e1df3df Quick hack so PowerPC macs can access system structures 1995-02-02 14:29:10 +00:00
Guido van Rossum 524b588553 Added 1995 to copyright message.
Setup.in: clarified Tk comments somewhat.
structmodule.c: use memcpy() instead of double precision assignment.
1995-01-04 19:10:35 +00:00
Guido van Rossum b6775db241 Merge alpha100 branch back to main trunk 1994-08-01 11:34:53 +00:00
Guido van Rossum 9bfef44d97 * Changed all copyright messages to include 1993.
* Stubs for faster implementation of local variables (not yet finished)
* Added function name to code object.  Print it for code and function
  objects.  THIS MAKES THE .PYC FILE FORMAT INCOMPATIBLE (the version
  number has changed accordingly)
* Print address of self for built-in methods
* New internal functions getattro and setattro (getattr/setattr with
  string object arg)
* Replaced "dictobject" with more powerful "mappingobject"
* New per-type functio tp_hash to implement arbitrary object hashing,
  and hashobject() to interface to it
* Added built-in functions hash(v) and hasattr(v, 'name')
* classobject: made some functions static that accidentally weren't;
  added __hash__ special instance method to implement hash()
* Added proper comparison for built-in methods and functions
1993-03-29 10:43:31 +00:00
Guido van Rossum 90ddb7b5cb unpack() now returns a tuple, not a list 1992-08-19 16:44:15 +00:00