[sword-devel] #include <lzma.h> in xzcomprs.cpp - is this a bug or ?

[Peter von Kaehne]

I think the original rationale for the three experimental compression methods was to find something most suitable for limited resources devices. Given that my current phone has 100+ times RAM, 64 times HD equivalent space and 20 times the processor speed than the first desktop computer on which I run CrossWire software,  I am not convinced that even at conception this concern had much merit.

Sent from my phone. Apologies for brevity and typos.On 3 Nov 2016 7:57 am, Jaak Ristioja <jaak at ristioja.ee> wrote:
>
> Thanks you, Peter! Ok, so XzCompress is experimental and the most common
> ZipCompress is considered stable. But what about LZSSCompress and
> Bzip2Compress?
>
> Will the experimental compression methods be removed from stable Sword
> releases in the future?
>
> J
>
> On 03.11.2016 09:45, Peter von Kaehne wrote:
> > I can categorically say that there are no released CW modules using any compression other than zip. There might be some in our experimental repo. But they would not be released so.
> > 
> > I would think the same can be confirmed rapidly with all other official repos, Xiphos, IBT and eBible. I am convinced they will say the same.
> > 
> > It is unlikely that anyone else has done so, but who knows? I would not worry about it. 
> > 
> > Peter
> > 
> > Sent from my phone. Apologies for brevity and typos.On 3 Nov 2016 07:31, Jaak Ristioja <jaak at ristioja.ee> wrote:
> >>
> >> I just tried `./configure && make` Sword 1.7.4 and it did compile in
> >> xzcomprs.cpp. So I guess the stable releases DO include the experimental
> >> code.
> >>
> >> Usually it helps when experimental features have their own feature
> >> branches or similar. This not being a common practice in the Sword
> >> project, is probably one cause for other experimental code reaching
> >> trunk as well (see the "Infinite loop in SWModule multilemma window
> >> search" thread on this mailing list).
> >>
> >> Anyway, are you saying that removing/disabling this code will not break
> >> anything for end-users? Because there are no (known?) modules which have
> >> XZ compression? I think there's a risk it has already been used for
> >> production. Can you please elaborate?
> >>
> >> Best regards,
> >> J
> >>
> >> PS: Unrelated to the issue at hand, but this article might be of
> >> interest to the Sword project: "Xz format inadequate for long-term
> >> archiving" http://www.nongnu.org/lzip/xz_inadequate.html
> >>
> >> On 03.11.2016 08:51, Peter von Kaehne wrote:
> >>> Leaving aside the question of a bug, xzcompress.cpp is experimental code. It is not included in any releases so far AFAIK and should not be compiled into releases or used by frontends. 
> >>>
> >>> At least under autotools you need to ask to include it. 
> >>>
> >>> We have no modules created with it and would currently not allow any either. The only currently used and acceptable compression is zip.
> >>>
> >>> HTH
> >>>
> >>> Peter
> >>> Sent from my phone. Apologies for brevity and typos.On 3 Nov 2016 02:50, TS <outofthecube at icloud.com> wrote:
> >>>>
> >>>> In xzcomprs.cpp, at line 30, there’s the code:
> >>>>
> >>>> #include <lzma.h>
> >>>>
> >>>> Xcode was not happy about this since there is no header named this. It seems that in the previous version of PocketSword, the fix was just to set Xcode as to not include this file when compiling so that’s what I’m doing too. Since the SWORD framework does not include lzma.h as a file, this seems like a bug to me, but perhaps there's a reason for it?
> >>>>
> >>>> I couldn’t find any reference regarding this matter in specific in the wiki or mailing list.
> >>>>
> >>>>
> >>>> -TS
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