Home » Personal collection » Acorn hard disk » unzip_tools » !Infozip » ReadMe

ReadMe

This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.

Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.

Tape/disk: Home » Personal collection » Acorn hard disk » unzip_tools » !Infozip
Filename: ReadMe
Read OK: ✔
File size: 2844 bytes
Load address: 0000
Exec address: 0000
File contents
    ____      ____            _
   /  _/___  / __/___  ____  (_)___
   / // __ \/ /_/ __ \/_  / / / __ \
 _/ // / / / __/ /_/ / / /_/ / /_/ / version 3�05
/___/_/ /_/_/  \____/ /___/_/ .___/
                           /_/      A front-end for the Info-Zip routines

I, Harriet Bazley, accept no credit (and likewise take no blame) for the performance of the zip/unzip procedures used by this program.   They are nothing to do with me whatsoever.   There may well be more recent versions available (current versions used by Infozip are UnZip 5�50 and Zip 2�3).

Hardware required: RISC-OS 3�1 or greater and enough free memory to run both a taskwindow and this program - at least 400k during the actual compression / decompression.  Sorry.

How to use:
----------
          Drag a zipfile to the iconbar icon and a window will be displayed showing its contents.   Drag the icon(s) out of this window into a Filer directory window in order to decompress and save the contents into that directory.   A taskwindow will appear, showing the progress so far.
          Drag any other type of file/directory/application to the iconbar icon and a standard savebox window will be displayed.   Drag the zipfile icon out of this window into a Filer directory window in order to compress and save your files into that directory.  A taskwindow will appear, showing the progress so far.
         Note that you can still use your desktop while a taskwindow is on screen - the computer doesn't 'lock up' - but DON'T close the taskwindow until it has finished!

More details:
------------
 Filetypes:
          Infozip ignores the filetype of files dragged to its icon.   Instead it performs a quick check (see "Technical details" below) to decide whether they are zipfiles or not.   This is necessary because files from a DOS source are not filetyped, and because many RISC OS files of type "Archive" (the type created by this program) are not archived by zip routines but by native RISC OS methods, and cannot be decompressed by this program.
          In its contents window, Infozip distinguishes only between directories, applications and files.   There is no way of reading the correct sprite for an application or the correct filetype of a file using the command-line interface (which is all this program actually does�), so all applications use the default sprite and all files appear as untyped files.

 The zipfile contents window:
          Unlike the RISC OS FIler, only one contents window can be open at a time, so the pane at the top of the window displays the 'internal path' (in the zipfile's internal UNIX file format) of the currently-displayed directory.
          Double-clicking on a directory or application icon will 'open' that directory and display its contents in the window.   To go back up to the previous directory, click on the up arrow icon at the top left of the contents window, or select 'Open parent' from the menu.   ADJUST-clicking will open a Filer window showing the zipfile itself.
          Double-clicking on a file will decompress and Filer_Run it.   If you hold down SHIFT while double-clicking the file will instead be loaded into a text editor.
          Dragging an icon out of the window will decompress it.   Choosing 'Select all' from the menu allows you to drag out the entire contents of a directory at once.    Dragging any object - even another zipfile! - *into* the window will cause it to be added to the contents of the zipfile.   The display will be updated to reflect this.   Hold down SHIFT to move the object into the zipfile, i.e. to delete the original after zipping it.
          The 'Display' submenu allows you to sort the icons in the window by name order instead of by the order in which they were originally added to the zipfile.
          Selecting 'Delete' from the 'File "name"' submenu allows you to delete that object.   The entry 'Info' on this submenu displays a window giving information on the file's date and size.
          Selecting 'New directory' allows you to create a new empty directory within the zipfile.

 Options:
          "Convert text files to LF": Any text files (as opposed to machine code, graphics files, etc.) will be decompressed with RISC OS line endings rather than the CR+LF combination.   Text files will be reported as [text] while decompressing (unless you have "Quiet output" selected) - if you notice it getting one wrong, you can switch this option off.
          "Ignore directory structure": All the files within all the directories in the archive will be saved into the same output directory.   Note that this could cause you to exceed the old ADFS 77-file directory limit!
          "DOS names in lowercase":  In theory any files archived on a DOS-based computer should be translated into lowercase.   Uppercase filenames archived on a RISC OS machine are *not* affected.
          "Quiet output": the taskwindow will only open if there is an error, or if you are asked to confirm that you wish to overwrite a file (unless "Overwrite silently" is selected).
          "Only extract newer": files will only be extracted, overwriting existing files, if the datestamp of the archived version is more recent.   In addition, if you are extracting from the top level of the zipfile, you will be asked to confirm overwriting.
          If this option is off, archived files will automatically be extracted whether or not non-archived versions exist in the destination directory - be careful!
          "Zip images as single files": image files are no longer translated into directories when zipped.

The current option settings are saved when you click on 'Save' in the Configure window.

 The savebox:
          When this appears, drag the icon to a directory window to determine where the new zipfile will be created.

 The iconbar:
          If a zipfile catalogue is open, then clicking SELECT on the iconbar icon will bring it to the front of the window stack. Clicking ADJUST will allow you to create a new (empty) zipfile.   Clicking SHIFT-ADJUST will open the Configure window. The iconbar menu additionally provides access to the application manual.

  Self-extracting archives:
          Dragging an existing archive to the iconbar while holding down CONTROL allows you to convert it to a self-extracting archive which will decompress itself when double-clicked.  Note that the resulting archives will work on RISC-OS computers ONLY.
          Dragging a self-extracting archive to the iconbar while holding down CONTROL gives you the option to convert it back to a normal zipfile.

Possible causes of error
------------------------
"This file is already compressed":  There is no point trying to compress this file since the filetype indicates that it is already compressed.   The list of filetypes to be rejected is set in the !Boot file and can be edited.

"This archive is not a zip file":  Not all files of type &DDC are zip archives.   Sorry.

Infozip thinks my (uncompressed) file is an archive and opens a window full of non-existent files with silly names:   Your file happens to meet my (rather loose) zipfile detection criteria - sorry.   Try splitting up the 'P' and the 'K' if you can (see below under "Technical details"), or add it to the contents of another archive rather than trying to drag it to the iconbar on its own.

"zip warning: name not matched":  This error is almost invariably caused by problems in DOS/RISC-OS filename conversion.   Note in particular that RISC-OS filenames will cause trouble if they have more than one slash character "/" in them, i.e. 'Cash1/8/98'.   Try using the 'Select all' option from the top level of the archive, even if there is only one file in the archive.

"A previous copy of Infozip still seems to be running":  Trying to run two copies simultaneously is likely to cause both to crash, so you should normally click on Cancel!   However, if Infozip crashes really badly, or is quit via Alt-Break on a RISC-PC, it may get confused and believe that the crashed copy is still running - if this was the case you will need to click OK.

"Task still in progress":     This error usually occurs when you drag a selection of icons out of a Filer window into Infozip, rather than just one.   It can also occur if you try to <add> an object to the contents window while Infozip is still in the middle of compression/decompression.
   Unfortunately Infozip isn't capable of keeping track of more than one external task (in this case, a taskwindow) at a time.   If you want to zip a selection of files, the best way to do it is to put them all in one directory and to zip that.

Note that there is a non-fatal bug in the Info-ZIP zip routine under RISC OS 4 when zipping directly to RAMdisc which causes it to do so *twice*, resulting in an error for the second attempt.   I have reported this behaviour but have no great hopes of seeing it fixed in the near future.

Technical details:
------------------
  Infozip's 'type-checking' is extremely crude since I have no idea what the correct specification for a zipfile is!   It simply checks whether the two characters occurring 22 bytes before the end of a file are the letters "PK" or not, and assumes that any file without these letters is to be compressed and not decompressed.

  Infozip adds the !Infozip.Routines directory to <Run$Path> - this means that you can access the 'zip' and 'unzip' routines directly from the command line. If you already have a copy of the Info-ZIP routines (for instance in your library directory), these will override the copies inside !Infozip.

Copying, altering or borrowing from this program:
------------------------------------------------
        The desktop front-end program !Infozip is freeware.   Anybody may give it to as many other people as they like - and they may also improve it in any way they see fit, and may appropriate any good ideas they find therein for their own programs.

        Sources for the zip/unzip command-line routines used are available from Info-ZIP's home Website, http://www.info-zip.org/pub/infozip/ and many other sites - see the documentation in the !Infozip.Routines directory.   These routines are copyright Info-ZIP and modified versions should *not* be redistributed without contacting them first.  (Try Zip-Bugs@lists.wku.edu)
00000000  20 20 20 20 5f 5f 5f 5f  20 20 20 20 20 20 5f 5f  |    ____      __|
00000010  5f 5f 20 20 20 20 20 20  20 20 20 20 20 20 5f 0a  |__            _.|
00000020  20 20 20 2f 20 20 5f 2f  5f 5f 5f 20 20 2f 20 5f  |   /  _/___  / _|
00000030  5f 2f 5f 5f 5f 20 20 5f  5f 5f 5f 20 20 28 5f 29  |_/___  ____  (_)|
00000040  5f 5f 5f 0a 20 20 20 2f  20 2f 2f 20 5f 5f 20 5c  |___.   / // __ \|
00000050  2f 20 2f 5f 2f 20 5f 5f  20 5c 2f 5f 20 20 2f 20  |/ /_/ __ \/_  / |
00000060  2f 20 2f 20 5f 5f 20 5c  0a 20 5f 2f 20 2f 2f 20  |/ / __ \. _/ // |
00000070  2f 20 2f 20 2f 20 5f 5f  2f 20 2f 5f 2f 20 2f 20  |/ / / __/ /_/ / |
00000080  2f 20 2f 5f 2f 20 2f 20  2f 5f 2f 20 2f 20 76 65  |/ /_/ / /_/ / ve|
00000090  72 73 69 6f 6e 20 33 b7  30 35 0a 2f 5f 5f 5f 2f  |rsion 3.05./___/|
000000a0  5f 2f 20 2f 5f 2f 5f 2f  20 20 5c 5f 5f 5f 5f 2f  |_/ /_/_/  \____/|
000000b0  20 2f 5f 5f 5f 2f 5f 2f  20 2e 5f 5f 5f 2f 0a 20  | /___/_/ .___/. |
000000c0  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
000000d0  20 20 20 20 20 20 20 20  20 20 2f 5f 2f 20 20 20  |          /_/   |
000000e0  20 20 20 41 20 66 72 6f  6e 74 2d 65 6e 64 20 66  |   A front-end f|
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00000110  72 69 65 74 20 42 61 7a  6c 65 79 2c 20 61 63 63  |riet Bazley, acc|
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00000150  68 65 20 70 65 72 66 6f  72 6d 61 6e 63 65 20 6f  |he performance o|
00000160  66 20 74 68 65 20 7a 69  70 2f 75 6e 7a 69 70 20  |f the zip/unzip |
00000170  70 72 6f 63 65 64 75 72  65 73 20 75 73 65 64 20  |procedures used |
00000180  62 79 20 74 68 69 73 20  70 72 6f 67 72 61 6d 2e  |by this program.|
00000190  20 20 20 54 68 65 79 20  61 72 65 20 6e 6f 74 68  |   They are noth|
000001a0  69 6e 67 20 74 6f 20 64  6f 20 77 69 74 68 20 6d  |ing to do with m|
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000001c0  54 68 65 72 65 20 6d 61  79 20 77 65 6c 6c 20 62  |There may well b|
000001d0  65 20 6d 6f 72 65 20 72  65 63 65 6e 74 20 76 65  |e more recent ve|
000001e0  72 73 69 6f 6e 73 20 61  76 61 69 6c 61 62 6c 65  |rsions available|
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00000230  0a 48 61 72 64 77 61 72  65 20 72 65 71 75 69 72  |.Hardware requir|
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00000250  6f 72 20 67 72 65 61 74  65 72 20 61 6e 64 20 65  |or greater and e|
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000002d0  6d 70 72 65 73 73 69 6f  6e 2e 20 20 53 6f 72 72  |mpression.  Sorr|
000002e0  79 2e 0a 0a 48 6f 77 20  74 6f 20 75 73 65 3a 0a  |y...How to use:.|
000002f0  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 0a 20 20 20 20 20  |----------.     |
00000300  20 20 20 20 20 44 72 61  67 20 61 20 7a 69 70 66  |     Drag a zipf|
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000004a0  72 61 67 20 74 68 65 20  7a 69 70 66 69 6c 65 20  |rag the zipfile |
000004b0  69 63 6f 6e 20 6f 75 74  20 6f 66 20 74 68 69 73  |icon out of this|
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00000540  68 6f 77 69 6e 67 20 74  68 65 20 70 72 6f 67 72  |howing the progr|
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00000560  20 20 20 20 20 4e 6f 74  65 20 74 68 61 74 20 79  |     Note that y|
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000005b0  74 68 65 20 63 6f 6d 70  75 74 65 72 20 64 6f 65  |the computer doe|
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00000610  61 69 6c 73 3a 0a 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |ails:.----------|
00000620  2d 2d 0a 20 46 69 6c 65  74 79 70 65 73 3a 0a 20  |--. Filetypes:. |
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00000920  68 65 20 64 65 66 61 75  6c 74 20 73 70 72 69 74  |he default sprit|
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00000960  69 70 66 69 6c 65 20 63  6f 6e 74 65 6e 74 73 20  |ipfile contents |
00000970  77 69 6e 64 6f 77 3a 0a  20 20 20 20 20 20 20 20  |window:.        |
00000980  20 20 55 6e 6c 69 6b 65  20 74 68 65 20 52 49 53  |  Unlike the RIS|
00000990  43 20 4f 53 20 46 49 6c  65 72 2c 20 6f 6e 6c 79  |C OS FIler, only|
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000009b0  6e 64 6f 77 20 63 61 6e  20 62 65 20 6f 70 65 6e  |ndow can be open|
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000009d0  68 65 20 70 61 6e 65 20  61 74 20 74 68 65 20 74  |he pane at the t|
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000009f0  20 64 69 73 70 6c 61 79  73 20 74 68 65 20 27 69  | displays the 'i|
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000027e0  20 76 65 72 73 69 6f 6e  73 20 73 68 6f 75 6c 64  | versions should|
000027f0  20 2a 6e 6f 74 2a 20 62  65 20 72 65 64 69 73 74  | *not* be redist|
00002800  72 69 62 75 74 65 64 20  77 69 74 68 6f 75 74 20  |ributed without |
00002810  63 6f 6e 74 61 63 74 69  6e 67 20 74 68 65 6d 20  |contacting them |
00002820  66 69 72 73 74 2e 20 20  28 54 72 79 20 5a 69 70  |first.  (Try Zip|
00002830  2d 42 75 67 73 40 6c 69  73 74 73 2e 77 6b 75 2e  |-Bugs@lists.wku.|
00002840  65 64 75 29                                       |edu)|
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