That's right - the initialization figures out the endianness of the
system it's running on. It's necessary to know the endianness of the
system it's running on so that it does the right thing with it's inputs.
For instance, in your case, the input is little-endian whatever kind
of system you're running, so if your system is also little-endian, it
doesn't need to reverse the bytes before decoding, whereas if your
system is big-endian, it knows it has to reverse the bytes before
decoding.
The bug (now fixed in 2.9 beta) was with the 'n' and 'N' binary
decode specifiers, which aren't used in the library, so weren't a
factor.
Assuming your case is unsigned, little-endian integers, you'd use
getUIntLE().
Best,
Mark
On 8 Jan 2008, at 12:00, Dave wrote:
Hi Mark,
Thanks a bunch! I was just playing binaryEncode/Decode when you
mail popped up. I've downloaded the stack. One quick question
though. In the Initialization you set the the endian flag, is this
is based on the type of system you are running on? e.g. (Big or
Little Endian?). If so is this because of the bug you mentioned in
the readme file?
Thanks again and All the Best
Dave
On 8 Jan 2008, at 11:34, Mark Smith wrote:
Dave, you can download a small library I wrote for exactly this
sort of thing:
go to http://www.futility.co.uk/futsoft/revolutionstuff.html
and download libBinConvert.
If you don't want to have to use yet another library, you can just
copy the appropriate function ( getIntLE() or getUIntLE() ) out of
the library.
Best,
Mark
On 8 Jan 2008, at 11:19, Dave wrote:
Hi,
I've tried a few things, such as:
put empty into myData
repeat 4 times
read from file myFile for 1 char
put it before myData
end repeat
But this doesn't work - just returns 0.
Not sure how to go about this in RunRev, although in C it was be
sooooooooooooooooooooo simple!
All the Best
Dave
On 8 Jan 2008, at 11:13, Mark Schonewille wrote:
Hi Dave,
You need to write a function to revert the numbers manually. I'd
say that's an easy task to do.
Best regards,
Mark Schonewille
--
Economy-x-Talk Consulting and Software Engineering
http://economy-x-talk.com
http://www.salery.biz
Quickly extract data from your HyperCard stacks with
DIFfersifier. http://differsifier.economy-x-talk.com
Op 8-jan-2008, om 12:08 heeft Dave het volgende geschreven:
Happy New Year to All!
Does anyone know of an easy way to read a 4 bytes (32 bit)
little endian number from a file?
I am running on a Mac and the file I am trying to process
*always* is stored in Little Endian Format, for instance:
The number 0x00000000BC (188) is stored in the file as:
0xBC000000 (a VERY large number!)
I want to get 188 when I read these four bytes.
Any ideas???
Thanks a lot
All the Best
Dave
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