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GZIP support

Discussion in 'Support' started by Stephen Howe, Jan 22, 2011.

  1. Stephen Howe

    Jun 7, 2008
    Likes Received:

    Using TCC 12.01.44

    1) If I do

    gzip /E1 B20100301.PVF.Z ..\B20100301.PVF

    it takes a long time to generate a ZIP using LZW algorithm (many minutes). It is a few seconds if it is /E0

    2) While it is doing this, it cannot be interrupted Ctrl-C or Ctrl-Break has no effect (until later)

    3) If I then do
    GZIP /V B20100301.PVF.Z
    afterwards, I see
    " The GZIP header is invalid."
    is this correct?

    If I do

    gzip /A B20100301.PVF.Z ..\B20100301.PVF

    it works. If I do

    gzip /A /L0 B20100301.PVF.Z ..\B20100301.PVF

    I get back a Usage complaint, despite the fact that /L0 is valid according to the help file.

    Usage : GZIP [A:[[-][+]rhsdaecjot] /A /E /Ln /M /O:[-]adegnrstu /Q /V] gzip arch
    ive [@file] file...

    5) From the help files, if I do GZIP /V (or UNGZIP /V), it is possible to see date time and filename (if available). Would it be possible to make compression method and level visible? Ditto for ZIP


    Stephen howe
  2. rconn

    rconn Administrator
    Staff Member

    May 14, 2008
    Likes Received:
    That's internal to the ZIP library; I'll pass it on to the developers.


    I doubt it, but it's not my code. It seems like a bug; I'll pass it on to the developers.

    The help is wrong; valid levels are 1 - 6.

    NITV. I don't know why this would be useful, but you can submit a suggestion for the next major version.

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