[PATCH STABLE] windows: make win32 mandatory (issue1922)

[Adrian Buehlmann]

On 2011-01-20 19:59, Aaron Cohen wrote:
> Would using ctypes directly help?

Yeah. ctypes are cool. But they require python 2.5.

> Such as, for instance:
> 
> import ctypes
> 
> class FILETIME(ctypes.Structure):
>     _fields_ = [
>         ('dwLowDateTime',       ctypes.c_uint),
>         ('dwHighDateTime',      ctypes.c_uint),
>     ]
> 
> class BY_HANDLE_FILE_INFORMATION(ctypes.Structure):
>     _fields_ = [
>         ('dwFileAttributes',        ctypes.c_uint),
>         ('ftCreationTime',          FILETIME),
>         ('ftLastAccessTime',        FILETIME),
>         ('ftLastWriteTime',         FILETIME),
>         ('dwVolumeSerialNumber',    ctypes.c_uint),
>         ('nFileSizeHigh',           ctypes.c_uint),
>         ('nFileSizeLow',            ctypes.c_uint),
>         ('nNumberOfLinks',          ctypes.c_uint),
>         ('nFileIndexHigh',          ctypes.c_uint),
>         ('nFileIndexLow',           ctypes.c_uint),
>     ]
> 
> _GENERIC_READ = 0x80000000
> 
> _FILE_SHARE_READ = 0x00000001
> 
> _OPEN_EXISTING = 3
> 
> def _getfileinfo(pathname):
>     if isinstance(pathname, str):
>         #TODO: I'm not sure how mercurial likes to do this
>         pathname = unicode(pathname)
> 
>     fh = ctypes.windll.kernel32.CreateFileW(pathname,
>             _GENERIC_READ, _FILE_SHARE_READ,
>             None, _OPEN_EXISTING, 0, None)
>     if fh == -1:
>         raise OSError(errno.ENOENT, 'The system cannot find the file specified')
> 
>         info = BY_HANDLE_FILE_INFORMATION()
>         # TODO: Raise an appropriate exception if this returns true
>         ctypes.windll.kernel32.GetFileInformationByHandle(fh,
> ctypes.pointer(info))
>         return info
> 
> def nlinks(pathname):
>     return _getfileinfo(pathname).nNumberOfLinks
> 
>