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  • Committer: John Arbash Meinel
  • Date: 2010-01-05 21:15:22 UTC
  • mto: (4934.1.9 2.1.0rc1-set-mtime)
  • mto: This revision was merged to the branch mainline in revision 4940.
  • Revision ID: john@arbash-meinel.com-20100105211522-s3vpbckrs9uvt11u
Move the functionality into osutils / extensions.

Aaron pointed out the functions should be on DiskTreeTransform not
spread some to TreeTransform.

Also, instead of using ctypes, we now just write our own function
in the win32 extension module. Which seems to work just fine.
And osutils.fset_mtime() is a thunk into that functionality.

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Lines of Context:
bzrlib/_walkdirs_win32.pyx
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    # Wide character functions
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    DWORD wcslen(WCHAR *)
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    ctypedef struct LARGE_INTEGER:
 
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        DWORD LowPart
 
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        DWORD HighPart
 
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    # TODO: Why does the win32 api use LARGE_INTEGER for this structure, but
 
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    #       FILETIME for the return from FindFirstFileW
 
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    ctypedef struct FILE_BASIC_INFO:
 
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         LARGE_INTEGER CreationTime
 
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         LARGE_INTEGER LastAccessTime
 
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         LARGE_INTEGER LastWriteTime
 
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         LARGE_INTEGER ChangeTime
 
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         DWORD FileAttributes
 
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    ctypedef enum FILE_INFO_BY_HANDLE_CLASS:
 
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        FileBasicInfo
 
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    int GetFileInformationByHandleEx(
 
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        HANDLE hFile, FILE_INFO_BY_HANDLE_CLASS type,
 
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        void* fileInformationBuffer, DWORD bufSize)
 
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    int SetFileInformationByHandle(
 
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        HANDLE hFile, FILE_INFO_BY_HANDLE_CLASS type,
 
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        void* fileInformationBuffer, DWORD bufSize)
 
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    long _get_osfhandle(int)
 
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cdef extern from "Python.h":
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    WCHAR *PyUnicode_AS_UNICODE(object)
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    object PyUnicode_AsUTF8String(object)
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import msvcrt
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import operator
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import stat
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    return (val * 1.0e-7) - 11644473600.0
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cdef FILETIME _timestamp_to_ftime(double timestamp):
 
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    """Convert a time-since-epoch to a FILETIME."""
 
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    cdef __int64 val
 
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    cdef FILETIME result
 
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    val = <__int64>((timestamp + 11644473600.0) * 1.0e7)
 
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    result.dwHighDateTime = val >> 32
 
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    result.dwLowDateTime = val & 0xFFFFFFFF
 
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    return result
 
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cdef int _should_skip(WIN32_FIND_DATAW *data):
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    """Is this '.' or '..' so we should skip it?"""
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    if (data.cFileName[0] != c'.'):
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                #       earlier Exception, so for now, I'm ignoring this
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        dirblock.sort(key=operator.itemgetter(1))
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        return dirblock
 
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def fset_mtime(fileno, mtime):
 
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    """See osutils.fset_mtime."""
 
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    cdef HANDLE the_handle
 
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    cdef FILE_BASIC_INFO bi
 
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    cdef FILETIME ft
 
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    cdef int retval
 
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    ft = _timestamp_to_ftime(mtime)
 
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    the_handle = <HANDLE>(_get_osfhandle(fileno))
 
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    if the_handle == <HANDLE>(-1):
 
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        raise OSError('Invalid fileno') # IOError?
 
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    retval = GetFileInformationByHandleEx(the_handle, FileBasicInfo,
 
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                                          &bi, sizeof(FILE_BASIC_INFO))
 
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    if retval != 1:
 
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        raise OSError('Failed to GetFileInformationByHandleEx')
 
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    bi.LastWriteTime.LowPart = ft.dwLowDateTime
 
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    bi.LastWriteTime.HighPart = ft.dwHighDateTime
 
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    retval = SetFileInformationByHandle(the_handle, FileBasicInfo,
 
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                                        &bi, sizeof(FILE_BASIC_INFO))
 
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    if retval != 1:
 
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        raise OSError('Failed to SetFileInformationByHandle')