[DiscordArchive] doesn't compressed headers usually include a few bytes to describe it ?
[DiscordArchive] doesn't compressed headers usually include a few bytes to describe it ?
Original source
doesn't compressed headers usually include a few bytes to describe it ?
rektbyfaith
02-14-2025, 11:29 PM #1Archived author: Titi • Posted: 2025-02-14T23:29:16.251000+00:00
Original source
doesn't compressed headers usually include a few bytes to describe it ?
Original source
I remember that from BLS files
![[Image: image.png?ex=690c86f5&is=690b3575&hm=84c...195215990&]](https://cdn.discordapp.com/attachments/1086807686571642900/1340103034432389130/image.png?ex=690c86f5&is=690b3575&hm=84c016d71c6c74d91bdeca1cb21dfb3e646d6bb979651d62fb9c913195215990&)
rektbyfaith
02-14-2025, 11:31 PM #2Archived author: Titi • Posted: 2025-02-14T23:31:01.442000+00:00
Original source
I remember that from BLS files
Original source
maybe there's extra info like mode, version etc if you're lucky
rektbyfaith
02-14-2025, 11:31 PM #3Archived author: Titi • Posted: 2025-02-14T23:31:24.699000+00:00
Original source
maybe there's extra info like mode, version etc if you're lucky
Original source
![[Image: image.png?ex=690c87e3&is=690b3663&hm=d95...3f229518c&]](https://cdn.discordapp.com/attachments/1086807686571642900/1340104035293724775/image.png?ex=690c87e3&is=690b3663&hm=d95d6490eacbc42fbe0695ccd53fe8d431537705a4d5e8d54a17d003f229518c&)
rektbyfaith
02-14-2025, 11:34 PM #4Archived author: 4bhorrent • Posted: 2025-02-14T23:34:59.991000+00:00
Original source
Original source
i am using `flate2` for it in Rust.
with the feature `zlib` it compiles a C library for linking against it, and with the compression setting 6 (default) it now produces a byte exact copy.
just if anyone else ever stumbles upon it, here you have it XD
rektbyfaith
02-14-2025, 11:36 PM #5Archived author: 4bhorrent • Posted: 2025-02-14T23:36:08.386000+00:00
Original source
i am using `flate2` for it in Rust.
with the feature `zlib` it compiles a C library for linking against it, and with the compression setting 6 (default) it now produces a byte exact copy.
just if anyone else ever stumbles upon it, here you have it XD
Original source
never knew that different implementations produced different output for the seemingly same settings (but on the other hand no wonder, compression setting is only a subset of settings of the algorithm... many might not be exposed in a library for usage).
rektbyfaith
02-14-2025, 11:37 PM #6Archived author: 4bhorrent • Posted: 2025-02-14T23:37:28.166000+00:00
Original source
never knew that different implementations produced different output for the seemingly same settings (but on the other hand no wonder, compression setting is only a subset of settings of the algorithm... many might not be exposed in a library for usage).
Original source
zlib itself seems to have a 2 byte header at the start... but i know too little to say anything concrete about it.
rektbyfaith
02-14-2025, 11:38 PM #7Archived author: 4bhorrent • Posted: 2025-02-14T23:38:47.992000+00:00
Original source
zlib itself seems to have a 2 byte header at the start... but i know too little to say anything concrete about it.
Original source
is compression even 100% determinstic? I'm not sure if you will get what you want
rektbyfaith
02-14-2025, 11:39 PM #8Archived author: stoneharry • Posted: 2025-02-14T23:39:53.974000+00:00
Original source
is compression even 100% determinstic? I'm not sure if you will get what you want
Original source
https://github.com/libyal/assorted/blob/...t.asciidoc maybe
rektbyfaith
02-14-2025, 11:39 PM #9Archived author: Titi • Posted: 2025-02-14T23:39:57.834000+00:00
Original source
https://github.com/libyal/assorted/blob/...t.asciidoc maybe
Original source
yes, at least most certainly for lossless compression
rektbyfaith
02-14-2025, 11:40 PM #10Archived author: 4bhorrent • Posted: 2025-02-14T23:40:11.174000+00:00
Original source
yes, at least most certainly for lossless compression
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