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.
> 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.
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.
HTH
--
Roman Yakovenko
C++ Python language binding
http://www.language-binding.net/
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