We have a new paper available, covering various popular encoding
algorithms - Base64, Base32, ASCII85, Hex. It includes a full
description of each algorithm, with worked examples.

This is freely available from the white papers section of our website
(www.morello.co.uk) or from the ImagingStuff site
(www.imagingstuff.com). Feel free to link to it or mirror it.

Comments are welcomed, please contact us via the website.

Tom

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imagingstuff@hotmail.com (ImagingStuff) wrote in message news:<83010b73.0309251554.576fa831@postin
g.google.com>...
quote:

> We have a new paper available, covering various popular encoding
> algorithms - Base64, Base32, ASCII85, Hex. It includes a full
> description of each algorithm, with worked examples.
>
> This is freely available from the white papers section of our website
> (www.morello.co.uk) or from the ImagingStuff site
> (www.imagingstuff.com). Feel free to link to it or mirror it.
>
> Comments are welcomed, please contact us via the website.
>
> Tom


Nice file!


Ernst

[ Post a follow-up to this message ]

In article <83010b73.0309251554.576fa831@posting.google.com>,
ImagingStuff <imagingstuff@hotmail.com> wrote:
quote:

> We have a new paper available, covering various popular encoding
> algorithms - Base64, Base32, ASCII85, Hex. It includes a full
> description of each algorithm, with worked examples.
>
> This is freely available from the white papers section of our website
> (www.morello.co.uk) or from the ImagingStuff site
> (www.imagingstuff.com). Feel free to link to it or mirror it.
>
> Comments are welcomed, please contact us via the website.


i think there's a problem / error with the part about ascii85 in that
binaryencoding.pdf document.

i could be wrong, but i was using that document to try and write an
ascii85 decoding bit of code to use in the pdf reading code i am
currently writing, and i went through the ascii85 section of that
document, doing the ascii85 decoding myself in order to work out how to
write the code for it and the numbers didn't add up.

&I<X6 is the first batch of 5 ascii85 chars in the example. the
document gives those 5 values 5, 72, 27, 55, 21. the second value 72
should be 40 i think, so from then on it's off because of that.

i think that that is the case. i was doing the process backwards so
maybe i got muddled?

[ Post a follow-up to this message ]

Ben,

If you are looking for tight, simple C code to use or check your work
against, take a look at http://www.webcom.com/~haahr/sources.html.

Specifically, ftp://ftp.webcom.com/pub/haahr/src/encode85.c and
ftp://ftp.webcom.com/pub/haahr/src/decode85.c.

Regards,
Frank


"ben" <x@x.x> wrote in message news:071020031902526182%x@x.x...
quote:

> In article <83010b73.0309251554.576fa831@posting.google.com>,
> ImagingStuff <imagingstuff@hotmail.com> wrote:
> 
>
> i think there's a problem / error with the part about ascii85 in that
> binaryencoding.pdf document.
>
> i could be wrong, but i was using that document to try and write an
> ascii85 decoding bit of code to use in the pdf reading code i am
> currently writing, and i went through the ascii85 section of that
> document, doing the ascii85 decoding myself in order to work out how to
> write the code for it and the numbers didn't add up.
>
> &I<X6 is the first batch of 5 ascii85 chars in the example. the
> document gives those 5 values 5, 72, 27, 55, 21. the second value 72
> should be 40 i think, so from then on it's off because of that.
>
> i think that that is the case. i was doing the process backwards so
> maybe i got muddled?

[ Post a follow-up to this message ]

"Frank Mackie" <me@home.com> wrote in
news:qPIgb.69452$Of2.2726715@twister.tampabay.rr.com:
quote:

> Ben,
>
> If you are looking for tight, simple C code to use or check your work
> against, take a look at http://www.webcom.com/~haahr/sources.html.
>
> Specifically, ftp://ftp.webcom.com/pub/haahr/src/encode85.c and
> ftp://ftp.webcom.com/pub/haahr/src/decode85.c.
>
> Regards,
> Frank
>



If you looking for simple code. You can easily translate a file to
any printable character set using some of my bijectvie condition
huffman compressors.


David A. Scott
--
My Crypto code
http://cryptography.org/cgi-bin/cry...sc/scott19u.zip
http://cryptography.org/cgi-bin/cry...sc/scott16u.zip
http://www.jim.com/jamesd/Kong/scott19u.zip old version
My Compression code http://bijective.dogma.net/
**TO EMAIL ME drop the roman "five" **
Disclaimer:I am in no way responsible for any of the statements
made in the above text. For all I know I might be drugged.
As a famous person once said "any cryptograhic
system is only as strong as its weakest link"

[ Post a follow-up to this message ]

In article <qPIgb.69452$Of2.2726715@twister.tampabay.rr.com>, Frank
Mackie <me@home.com> wrote:
quote:

> Ben,
>
> If you are looking for tight, simple C code to use or check your work
> against, take a look at http://www.webcom.com/~haahr/sources.html.
>
> Specifically, ftp://ftp.webcom.com/pub/haahr/src/encode85.c and
> ftp://ftp.webcom.com/pub/haahr/src/decode85.c.
>
> Regards,
> Frank
>


great, yes i probably will use that although i think my code's nearly
there but i haven't handled the 'z' and end of data parts yet. but
that's bound to be more efficient i guess.

thanks.


quote:

>
> "ben" <x@x.x> wrote in message news:071020031902526182%x@x.x... 
>
>

[ Post a follow-up to this message ]