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92 lines
2.7 KiB
Plaintext
92 lines
2.7 KiB
Plaintext
NufxLib "samples" README
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This directory contains some test programs and useful sample code.
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test-basic
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==========
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Basic tests. Run this to verify that things are working.
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exerciser
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=========
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This program allows you to exercise all of NufxLib's basic functions.
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Run it without arguments and hit "?" for a list of commands.
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If you think you have found a bug in NufxLib, you can use this to narrow
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it down to a repeatable case.
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imgconv
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=======
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A 2IMG disk image converter. You can convert ".2MG" files to ShrinkIt
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disk archives, and ShrinkIt disk archives to 2IMG format. imgconv uses
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a creator type of "NFXL".
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You can use it like this:
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% imgconv file.shk file.2mg
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or
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% imgconv file.2mg file.shk
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It figures out what to do based on the filename. It will recognize ".sdk"
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as a ShrinkIt archive.
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Limitations: works for DOS-ordered and ProDOS-ordered 2MG images, but
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not for raw nibble images. Converting from .shk only works if the first
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record in the archive is a disk image; you don't get to pick the one you
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want from an archive with several in it.
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launder
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=======
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Run an archive through the laundry. This copies the entire contents of
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an archive thread-by-thread, reconstructing it such that the data
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matches the original even if the archive contents don't (e.g. records
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are updated to version 3, files may be recompressed with LZW/2, option
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lists are stripped out, etc).
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The basic usage is:
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% launder [-crfa] infile.shk outfile.shk
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The flags are:
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-c Just copy threads rather than recompressing them
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-r Add threads in reverse order
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-f Call NuFlush after every record
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-a Call NuAbort after every record, then re-do the record and call NuFlush
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-t Write to temp file, instead of writing directly into outfile.shk
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If you use the "-c" flag with an archive created by P8 ShrinkIt or NuLib,
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the laundered archive may have CRC failures. This is because "launder"
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creates version 3 records, which are expected to have a valid CRC in the
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thread header. The only way to compute the CRC is to uncompress the data,
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which "launder" doesn't do when "-c" is set. The data itself is fine,
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it's just the thread CRC that's wrong (if the data were hosed, the LZW/1
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CRC would be bad too). "launder" will issue a warning when it detects
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this situation.
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If you find that you're running out of memory on very large archives, you
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can reduce the memory requirements by specifying the "-f" flag.
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test-simple
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===========
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Simple test program. Give it the name of an archive, and it will display
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the contents.
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test-extract
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============
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Simple test program. Give it the name of an archive, and it will write
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all filename threads into "out.buf", "out.fp", and "out.file" using three
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different kinds of NuDataSinks.
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