mirror of
https://github.com/marketideas/qasm.git
synced 2024-12-28 21:30:37 +00:00
132 lines
4.2 KiB
Plaintext
132 lines
4.2 KiB
Plaintext
NufxLib "samples" README
|
|
|
|
This directory contains some test programs and useful sample code.
|
|
|
|
|
|
test-basic
|
|
==========
|
|
|
|
Basic tests. Run this to verify that things are working.
|
|
|
|
On Win32 there will be a second executable, test-basic-d, that links against
|
|
the DLL rather than the static library.
|
|
|
|
|
|
exerciser
|
|
=========
|
|
|
|
This program allows you to exercise all of NufxLib's basic functions.
|
|
Run it without arguments and hit "?" for a list of commands.
|
|
|
|
If you think you have found a bug in NufxLib, you can use this to narrow
|
|
it down to a repeatable case.
|
|
|
|
|
|
imgconv
|
|
=======
|
|
|
|
A 2IMG disk image converter. You can convert ".2MG" files to ShrinkIt
|
|
disk archives, and ShrinkIt disk archives to 2IMG format. imgconv uses
|
|
a creator type of "NFXL".
|
|
|
|
You can use it like this:
|
|
|
|
% imgconv file.shk file.2mg
|
|
or
|
|
% imgconv file.2mg file.shk
|
|
|
|
It figures out what to do based on the filename. It will recognize ".sdk"
|
|
as a ShrinkIt archive.
|
|
|
|
Limitations: works for DOS-ordered and ProDOS-ordered 2MG images, but
|
|
not for raw nibble images. Converting from .shk only works if the first
|
|
record in the archive is a disk image; you don't get to pick the one you
|
|
want from an archive with several in it.
|
|
|
|
|
|
launder
|
|
=======
|
|
|
|
Run an archive through the laundry. This copies the entire contents of
|
|
an archive thread-by-thread, reconstructing it such that the data
|
|
matches the original even if the archive contents don't (e.g. records
|
|
are updated to version 3, files may be recompressed with LZW/2, option
|
|
lists are stripped out, etc).
|
|
|
|
The basic usage is:
|
|
|
|
% launder [-crfa] [-m method] infile.shk outfile.shk
|
|
|
|
The flags are:
|
|
|
|
-c Just copy data threads rather than recompressing them
|
|
-r Add threads in reverse order
|
|
-f Call NuFlush after every record
|
|
-a Call NuAbort after every record, then re-do the record and call NuFlush
|
|
-t Write to temp file, instead of writing directly into outfile.shk
|
|
|
|
The "-m method" flag allows you to specify the compression method. Valid
|
|
values are sq (SQueeze), lzw1 (ShrinkIt LZW/1), lzw2 (ShrinkIt LZW/2),
|
|
lzc12 (12-bit UNIX "compress"), lzc16 (16-bit UNIX "compress"), deflate
|
|
(zlib deflate), and bzip2 (libbz2 compression). The default is lzw2.
|
|
|
|
If you use the "-c" flag with an archive created by P8 ShrinkIt or NuLib,
|
|
the laundered archive may have CRC failures when you try to extract
|
|
from it. This is because "launder" creates version 3 records, which
|
|
are expected to have a valid CRC in the thread header. The only way
|
|
to compute the CRC is to uncompress the data, which "launder" doesn't
|
|
do when "-c" is set. The data itself is fine, it's just the thread CRC
|
|
that's wrong (if the data were hosed, the LZW/1 CRC would be bad too).
|
|
"launder" will issue a warning when it detects this situation.
|
|
|
|
By default, launder will try to keep the entire archive in memory and flush
|
|
all of the operations at the end. If you find that you're running out
|
|
of memory on very large archives, you can reduce the memory requirements
|
|
by specifying the "-f" flag.
|
|
|
|
|
|
test-names
|
|
==========
|
|
|
|
Tests Unicode filename handling. Run without arguments.
|
|
|
|
(This currently fails on Win32 because the Unicode filename support is
|
|
incomplete there.)
|
|
|
|
|
|
test-simple
|
|
===========
|
|
|
|
Simple test program. Give it the name of an archive, and it will display
|
|
the contents.
|
|
|
|
|
|
test-extract
|
|
============
|
|
|
|
Simple test program. Give it the name of an archive, and it will write
|
|
all filename threads into "out.buf", "out.fp", and "out.file" using three
|
|
different kinds of NuDataSinks.
|
|
|
|
|
|
test-twirl
|
|
==========
|
|
|
|
Like "launder", but not meant to be useful. This recompresses the file "in
|
|
place", deleting and adding threads within existing records several times.
|
|
The changes are periodically flushed, but the archive is never closed.
|
|
The goal is to test repeated updates on an open archive.
|
|
|
|
The CRC verification mechanism will fail on archives created with ProDOS
|
|
8 ShrinkIt. The older "version 1" records didn't have CRCs in the thread
|
|
headers, so you will get a series of messages that look like this:
|
|
|
|
ERROR: CRC mismatch: 0 old=0x0000 new=0x681b
|
|
ERROR: CRC mismatch: 1 old=0x0000 new=0x5570
|
|
ERROR: CRC mismatch: 2 old=0x0000 new=0x4ec5
|
|
|
|
This will leave the original archive alone, making a copy of it named
|
|
"TwirlCopy678" in the current directory. It overwrites its temp file,
|
|
"TwirlTmp789", without prompting.
|
|
|