Roman Yakovenko <roman.yakove...@gmail.com> writes:
> On Tue, Dec 8, 2009 at 5:55 PM, Nikolaus Rath <nikol...@rath.org> wrote:
>>
>> Hello,
>>
>> Is it possible to use Py++ to "convert" structures from a C header, say
>>
>> ,----
>> | struct flock
>> | {
>> | short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
>> | short int l_whence; /* Where `l_start' is relative to (like `lseek').
>> */
>> | #ifndef __USE_FILE_OFFSET64
>> | __off_t l_start; /* Offset where the lock begins. */
>> | __off_t l_len; /* Size of the locked area; zero means until EOF.
>> */
>> | #else
>> | __off64_t l_start; /* Offset where the lock begins. */
>> | __off64_t l_len; /* Size of the locked area; zero means until EOF.
>> */
>> | #endif
>> | __pid_t l_pid; /* Process holding the lock. */
>> | };
>> `----
>>
>> from fcntl.h into the corresponding ctypes Structure,
>>
>> ,----
>> | class flock_t(Structure):
>> | _fields_ = [
>> | ('l_type', c_short),
>> | ('l_whence', c_short),
>> | ('l_start', c_uint64),
>> | ('l_len', c_uint64),
>> | ('l_pid', c_int)
>> | ]
>> `----
>>
>> while automatically taking into account the #ifdefs and how types like
>> off_t and pid_t are actually defined on the target system?
>
> No, the generated code, will only work on the platform with the same
> struct definition.
So as long as I generate the code on the local platform (e.g. during
package installation) I will be fine, right? That's enough for me.
>> The introduction on
>> http://www.language-binding.net/pyplusplus/pyplusplus.html says that
>> Py++ can act as a code generator for ctypes, but I could not find any
>> documentation for the sort of application that I describe here.
>
> Unfortunately I don't have time to write one. I am extremely busy this days.
>
> You can take a look on gmplib example:
> http://pygccxml.svn.sourceforge.net/viewvc/pygccxml/pyplusplus_dev/examples/gmplib_dev/
> It is fully working.
This looks really interesting. I will try to modify that for use with my
library. Thanks for the link!
> You also can take a look on "wrap_library" "executable":
> http://sourceforge.net/projects/pygccxml/files/ctypes%20code%20generator/initial%20release/wrap_library.zip/download
>
> It creates ctypes code, using default settings.
This file seems to contain only lots of binary files, but no
documentation or .py files, so I am a bit lost. What exactly is it
supposed to do?
Best,
-Nikolaus
--
»Time flies like an arrow, fruit flies like a Banana.«
PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C
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