Re: Searching for an assembly guru -- DART disk utility

From: David Ryskalczyk <d235j.1_at_email.domain.hidden>
Date: Sat, 20 Jan 2018 22:03:19 -0500

Fixed the RLE hookup and pushed to BitBucket at https://bitbucket.org/david_rysk/theunarchiver/commits/abe75473b0b8c2301821d2b8097d0cf351cd9516?at=DART

David

> On Jan 20, 2018, at 9:49 PM, David Ryskalczyk <d235j.1_at_email.domain.hidden> wrote:
> 
> Well I hooked up the DART implementation I wrote (but didn’t complete) for XADMaster 4.5 years ago and it seems to decompress LZH DART images fine, including the "problem" ones.
> I’ve attached a diff against current XADMaster (repo linked below)
> 
> Note that RLE decompression is not correctly hooked up in this implementation.
> 
> David
> 
> <XADDART_20180120.patch>
> 
>> On Jan 20, 2018, at 4:14 PM, David Ryskalczyk <d235j.1_at_email.domain.hidden> wrote:
>> 
>> I was able to disassemble DartLib.o, with ksherlock’s mpw (https://github.com/ksherlock/mpw) and the DumpObj tool that comes with MPW.
>> I’m not sure if there is a policy on posting such disassemblies to this list. If this is OK, I can post it, or alternatively I can send it to someone who asks.
>> That said, it is not particularly difficult to do this yourself.
>> 
>> Now it comes down to determining the differences between the DART LZH implementation and Dynamic LZH as implemented in http://bitbucket.org/kosovan/theunarchiver/src/9648ef3e389b77ece47f55f031e9468e4dae03b4/XADMaster/XADLZHDynamicHandle.m , which seems to work in most but not all cases.
>> 
>> David
>> 

>>> On Jan 20, 2018, at 9:21 AM, Natalia Portillo <claunia_at_email.domain.hidden> wrote:
>>>
>>> hdid and hdiutil are just frontends to the PrivateFramework
>>> DiskImages.framework. There's the algorithm
>>>
>>> On 20/01/18 10:15, gilles wrote:

>>>> After some code reading the disc image does not seem to be present in open source code from macos/darwin. The code should be in hdid (10.0 -> 10.2) or hdiutil (10.3+) . 
>>>> 

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Received on 2018-01-20 22:08:34