ctypes 0.9.2 released
theller at python.net
Thu Oct 28 20:38:57 CEST 2004
ctypes 0.9.2 released - Oct 28, 2004
ctypes is a ffi (Foreign Function Interface) package for Python
2.3 and higher.
ctypes allows to call functions exposed from dlls/shared libraries
and has extensive facilities to create, access and manipulate
simple and complicated C data types in Python - in other words:
wrap libraries in pure Python. It is even possible to implement C
callback functions in pure Python.
ctypes runs on Windows, MacOS X, Linux, Solaris, FreeBSD, OpenBSD.
It may also run on other systems, provided that libffi supports
On windows, ctypes contains a ctypes.com package which allows to
call and implement custom COM interfaces.
If you download the source distribution, please choose the ZIP
file for Windows, and the .tar.gz file for other systems.
These archive have different contents!
Changes in 0.9.2
Fixed several bugs and memory leaks.
ctypes is now tested on Windows, Linux (x86 and x86_64), OpenBSD
and Mac OS X.
Implemented some helper functions: memmove, memset, string_at, wstring_at.
The former act as their C library counterpart, the latter two allow
to read a zero-terminated (wide) strings at a certain address.
Implemented a cast(cobj, ctype) function, which creates a new object
of the specified ctype from an existing object.
ctypes now explicitely allocates executable memory for the callbacks
it creates, this makes it work correctly on platforms where
executing data is normally forbidden (OpenBSD, Win XP SP2 on AMD 64).
Fixed the unicode handling on non-windows platforms.
Bit fields in structures and unions are now implemented.
For a bit field, one would specify the width in bits as the third
part in the _fields_ list like this:
_fields_ = [("anInt", c_int),
("aBitField", c_int, 3)]
POINTER(None) now returns c_void_p. This change was made for easier
code generation, and makes sense since 'None' is the ctypes way to
Detailed changelogs are in CVS:
The ultimate purpose of the 0.9 release series is to shake out the
remaining bugs, especially on platforms I have no access to, and
to target a rock stable ctypes 1.0 release.
When ctypes 1.0 is released, the com framework will be split off
into a separate framework named 'comtypes'.
Downloads are available in the sourceforge files section
Separate source distributions are available for windows and non-windows systems.
Please use the .zip file for Windows (it contains the ctypes.com framework),
and use the .tar.gz file for non-Windows systems (it contains the
complete cross-platform libffi sources).
Binary windows installers, which contain compiled extension
modules, are also available, be sure to download the correct one
for the Python version you are using.
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