ObjFW  History of src/OFLHAArchive.m of 60c6616ea4f83e6f

The naming was confusing, as it is used to refer to a specific file in
an archive and not the entire archive. file: [ddea1bb0a0] check-in: [34a3e817b3] user: js, branch: trunk, size: 14338 [annotate] [blame] [check-ins using] [diff]

Some names are too generic and might cause conflicts (e.g. zoo). file: [de067758a4] check-in: [13f0321eff] user: js, branch: trunk, size: 14394 [annotate] [blame] [check-ins using] [diff]

Only support for reading so far.

Compression methods 0 (uncompressed) and 2 (LZ77 + Huffman, apparently
identical to lh4/lh5) are supported. file: [97efb45aaf] check-in: [9a95da71d5] user: js, branch: trunk, size: 14379 [annotate] [blame] [check-ins using] [diff]

It's generally uncommon to prefix those.

Additionally, it might be worthwhile to try to get those actually
registered, which requires usage. file: [4f2f21f0fa] check-in: [9b3cae6cba] user: js, branch: trunk, size: 12782 [annotate] [blame] [check-ins using] [diff]

In order to not create a retain cycle, this changes the reference to the
last returned stream to an unsafe unretained one that the stream itself
resets to nil in its dealloc. file: [7d50694f14] check-in: [b53baf71ad] user: js, branch: trunk, size: 12736 [annotate] [blame] [check-ins using] [diff]

There's newer, less common LHA versions that allow 64 bit for the size.
However, for consistency with OFTarArchiveEntry, use unsigned long long
instead of uint64_t. file: [39715cb197] check-in: [6f13f74134] user: js, branch: trunk, size: 12091 [annotate] [blame] [check-ins using] [diff]

The old write API made it too easy to lose bytes when a stream is set to
non-blocking mode. The new API always throws when not all bytes were
written, which forces handling the number of bytes being written being
smaller than the number of bytes requested to be written. file: [9340f7479b] check-in: [d1d36ae522] user: js, branch: trunk, size: 12007 [annotate] [blame] [check-ins using] [diff]

Still miscompiles things. file: [d4b33ee3bc] check-in: [9e9ce6aa1c] user: js, branch: trunk, size: 12333 [annotate] [blame] [check-ins using] [diff]

This means refusing to close twice, calling -[close] from -[dealloc] and
not calling -[cancelAsyncRequests].

Calling -[cancelAsyncRequests] in -[close] is too dangerous, as -[close]
gets called by -[dealloc]: If the queue is the last reference to the
object, at the point where -[cancelAsyncRequests] removes it from the
queue, the object will start to deallocate and call into
-[cancelAsyncRequests] again, which is still in the middle of removing
it and now finds itself with an inconsistent state. file: [a09f2c8a17] check-in: [3b43d51006] user: js, branch: trunk, size: 12018 [annotate] [blame] [check-ins using] [diff]

This also adds a parameter for the actual and expected checksum. file: [1f3aa621cb] check-in: [8f21e8acb5] user: js, branch: trunk, size: 20045 [annotate] [blame] [check-ins using] [diff]

Apparently, there are two incompatible variants of LHA: One where the
sliding window is prefilled with zeros and one where it is prefilled
with spaces. It seems prefilling it with spaces is the original way,
while LHA on Amiga prefilled it with zeros.

As it is impossible to detect which one was used, a flag will be added
later to provide an Amiga compatibility mode. file: [19e9187eb0] check-in: [744956a000] user: js, branch: trunk, size: 18365 [annotate] [blame] [check-ins using] [diff]

This includes GCC thinking uint16_t and uint_fast16_t have a different
signedness and pointers to subclasses of OFStream and pointers to
OFStream being incompatible pointer types. file: [9530d9435c] check-in: [44413ada84] user: js, branch: trunk, size: 18221 [annotate] [blame] [check-ins using] [diff]

It is only necessary to extract files, so it makes sense to keep it as
is to be able to list files using an unknown method. file: [dc06a91f23] check-in: [1a6e3816c1] user: js, branch: trunk, size: 5515 [annotate] [blame] [check-ins using] [diff]

This is currently limited to reading uncompressed LHA level 2 files. file: [d7dfa4dbcd] check-in: [790b5344d6] user: js, branch: trunk, size: 5527 [annotate] [blame] [check-ins using]