[Gambas-user] Base 64 question

[Fabien Bodard]

gb.xml !

2011/4/28 Caveat <Gambas at ...1950...>:
> Hi Richard,
>
> I don't know of any base64 decode function in Gambas, but then I didn't
> look that hard ;-)
>
> There are various different flavours of base64, so be sure you know
> which variant you're dealing with.
>
> I enclose with this mail a source archive of a little project I've put
> together (sorry, it's Gambas2, hope that's OK) that demonstrates
> decoding (and encoding) of base64 data.  I found the information on how
> to put together the encode and decode algorithms here:
> http://en.wikipedia.org/wiki/Base64
>
> There's also a reference to base64 in Gambas here:
> http://www.gambasforum.com/index.php?topic=330.0
> The algorithms given in those code snippets could well be far more
> efficient than mine.
>
> My Base64 Project
> -----------------
> First thing to try is just hit the Encode button, it should convert the
> text in the top textarea into base64 and place the result in the lower
> textarea. Generally, if the In textbox is blank, the input for Encode or
> Decode will be the upper textarea, and if the Out textbox is blank, the
> output of the Encode or Decode will be shown in the lower textarea.  To
> encode binary data, you'll need to use a file as input, so use the In
> textbox to specify the file name.  To decode base64 that represents
> binary data, you'll need to use a file as output, so use the Out textbox
> to specify the output file name.
>
> You can try out binary to base64 using fluffy.jpg (shipped with the
> project) as your In file.
>
> To test round-trip (so start with a binary, encode it to base64, then
> decode the base64 data to make an identical binary)... enter fluffy.jpg
> in the In textbox, blank the Out textbox, hit Encode.  In the lower
> textarea Select All, Copy... then in the upper textarea Paste.  Now
> clear the In textbox and enter coffee.jpg in the Out textbox.  Hit
> Decode.  You *should* find a new file in your Base64 project directory
> called coffee.jpg, and it *should* be identical to the fluffy.jpg
> shipped with the project.
>
> I'm not convinced that my completely untuned, horribly inefficient
> algorithms in Gambas will be the best way to go if speed is of the
> essence or if the pdf files are gonna be more than a few 100 kbs... you
> might find it quicker/more robust to call out to a built-in function in
> java/python/some other program...
>
> Anyways, all the (commented) source is there for you to see/fiddle
> with...so have fun, but if you have any questions, just give me a shout.
>
> Regards,
> Caveat
>
>
>
> On Thu, 2011-04-28 at 07:38 +1000, Ian Haywood wrote:
>> No, HL7 parsing is fine, let me restate the question: does gambas have
>> an inbuilt function to
>> decode base 64 data?
>>
>> Ian
>>
>> On Thu, Apr 28, 2011 at 3:48 AM, nando <nando_f at ...951...> wrote:
>> > Health Level 7 file format
>> > To start visit:
>> > http://en.wikipedia.org/wiki/Health_Level_7
>> >
>> >
>> > ---------- Original Message -----------
>> > From: richard terry <rterry at ...1946...>
>> > To: mailing list for gambas users <gambas-user at lists.sourceforge.net>
>> > Sent: Wed, 27 Apr 2011 18:13:57 +1000
>> > Subject: [Gambas-user] Base 64 question
>> >
>> >> Hi list,
>> >>
>> >> I've a HL7 file apparently with embedded base64 data (as a pdf) I wondered if
>> >> there iwas any way to de-encode the data, if that is the right syntax.
>> >>
>> >> Regards
>> >>
>> >> Richard
>> >>
>> >> ------------------------------------------------------------------------------
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>> > management toolset available today.  Delivers lowest initial
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>>
>> ------------------------------------------------------------------------------
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>> The most intuitive, comprehensive, and cost-effective network
>> management toolset available today.  Delivers lowest initial
>> acquisition cost and overall TCO of any competing solution.
>> http://p.sf.net/sfu/whatsupgold-sd
>> _______________________________________________
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>
>
> ------------------------------------------------------------------------------
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> The most intuitive, comprehensive, and cost-effective network
> management toolset available today.  Delivers lowest initial
> acquisition cost and overall TCO of any competing solution.
> http://p.sf.net/sfu/whatsupgold-sd
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>



-- 
Fabien Bodard