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yllLiBe

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Posts posted by yllLiBe


  1. Hello.

     

    I have found a bit of a problem.

    In the build mode, pressing Enter key or some combination keys (such as ctrl-z [undo], ctrl-y [redo], and so on) in the volume label field of ISO9660 cause an `Unacceptable Character' balloon.

    So I can't undo this field.

    Maybe fields of Joliet and UDF doesn't have this problem because there are no restrictions.

     

    Regards


  2. Thanks for your reply.

     

    I guessed timestamp truncation may be because of some reasons for UDF specification, but now I understand it was not.

     

    From what I can figure out now, the following *should* work... (please correct me if I'm wrong!)

    (snip)

     

    It seems to be correct, but let me show the way to get a little more precisive timestamp.

     

    #include <windows.h>
    #include <stdio.h>
    
    int main(int argc, char *argv[])
    {
       SYSTEMTIME SystemTime;
       FILETIME CreationTime, LastAccessTime, LastWriteTime;
       int Centiseconds;
       ULARGE_INTEGER uli;
       HANDLE h = CreateFile(L"foo", 0, 0, NULL, CREATE_ALWAYS, 0, NULL);
       GetFileTime(h, &CreationTime, &LastAccessTime, &LastWriteTime);
    
       FileTimeToSystemTime(&LastWriteTime, &SystemTime);
       printf("A: Centiseconds: %d\n", (Centiseconds = SystemTime.wMilliseconds / 10));
       printf("A: HundredsofMicroseconds: %d\n", (SystemTime.wMilliseconds - (Centiseconds * 10)) * 10);
       printf("A: Microseconds: %d\n", 0);
    
       uli.LowPart = LastWriteTime.dwLowDateTime;
       uli.HighPart = LastWriteTime.dwHighDateTime;
       printf("B: Centiseconds: %d\n", (uli.QuadPart / 100000) % 100);
       printf("B: HundredsofMicroseconds: %d\n", (uli.QuadPart / 1000) % 100);
       printf("B: Microseconds: %d\n", (uli.QuadPart / 10) % 100);
    
       CloseHandle(h);
       return 0;
    }
    

     

    The result of above code is here.

     

    <command prompt>
    C:\Data\Make\Programs\test_nanosecond\Debug>test_nanosecond.exe
    A: Centiseconds: 71
    A: HundredsofMicroseconds: 80
    A: Microseconds: 0
    B: Centiseconds: 71
    B: HundredsofMicroseconds: 87
    B: Microseconds: 50
    
    <cygwin bash shell>
    $ ls --full-time foo
    -rwx------+ 1 yllLiBe なし(*) 0 2011-01-05 23:17:55.718750000 +0900 foo
    
    (*): means `no group' in English.
    

     

    Case A is the way you've written above.

    It uses FileTimeToSystemTime() to get a value of milliseconds.

     

    Case B is the way to use the FILETIME structure directly which has 100-nanosecond intervals. [MSDN]

    This can get a little more precisive value of timestamp.

    FYI, timestamp tick looks like 0.000125 sec (= 125 microseconds) in my environment actually.

    I can see the time such as HH:MM:SS.mmm125000 and HH:MM:SS.mmm750000 by `ls --full-time', but I can't see HH:MM:SS.mmm100000 and HH:MM:SS.mmm200000.

     

    Could you consider to change timestamp conversion more precise in the next update?

     

    Sincerely yours.


  3. Hello.

    I'm an ImgBurn user from Japan.

    Thanks for the great software.

     

    Can I build disc image with keeping timestamp precision in milliseconds?

    Or is there any reason why ImgBurn truncate timestamp in the second time scale?

     

    I confirmed following.

    1. NTFS has 100 nanosecond precision of timestamp. ( http://msdn.microsoft.com/en-us/library/ms724290%28VS.85%29.aspx )
    2. I can get milliseconds of timestamp by FindFirstFile() function and FileTimeToSystemTime() function.
    3. At Cygwin Bash shell, `ls --full-time' displays nanoseconds of timestamp (ofcourse it doesn't have full resolution.)
    4. timestamp structure of UDF 1.02 has Microseconds field. ( http://www.osta.org/specs/pdf/udf102.pdf )
    5. Viewing a disc image file built by ImgBurn with binary editor, Centiseconds, HundredsofMicroseconds and Microseconds field seem to be zero.

     

    I tried to burn a disc which contains image files and thumbnail files created by certain image viewer.

    But image files in the disc has a little different timestamp from original files, so the image viewer recreates thumbnails.

    This is the reason I want to store timestamp in milliseconds.

     

    Sorry for my poor English.

    Sincerely yours.

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