Re: Hex String Handlers
Re: Hex String Handlers
- Subject: Re: Hex String Handlers
- From: "Arthur J. Knapp" <email@hidden>
- Date: Tue, 31 Dec 2002 11:18:24 -0500
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Date: Mon, 30 Dec 2002 10:54:25 -0500
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Subject: Re: Hex String Handlers
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From: "Arthur J. Knapp" <email@hidden>
I wrote:
>
Try this:
>
>
property ksHex : "0123456789ABCDEF"
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property ks256 : run script "
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set a to {}
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repeat with i from 0 to 255
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set a's end to ascii character i
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end
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return a as string"
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on StringToHex(s)
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set t to text item delimiters
Some more recent versions of AppleScript seem to require that
the "of AppleScript" syntax is always required with the text item
delimiters, so:
set t to AppleScript's text item delimiters
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set h to ""
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repeat with c in s
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set text item delimiters to c
It has recently been brought to my attention that some versions
of AppleScript are not going to behave as I would expect them to
in the above. It is safer to explictly coerce the "c" from the
"c in s" statment to a string before assigning it to the text
item delimiters:
repeat with c in s
set AppleScript's text item delimiters to (c as string)
>
set i to ks256's text item 1's length
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set h to h & ,
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ksHex's item (i div 16 + 1) & ,
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ksHex's item (i mod 16 + 1)
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end repeat
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set text item delimiters to t
set AppleScript's text item delimiters to t
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return h
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end StringToHex
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set str to "abc"
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try
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err of (str as Pascal string)
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on error m
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end try
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m's text from -((str's length) * 2 + 2) to -3 --> "616263"
I neglicted to mention a very obvious limitation of the above,
namely, that a Pascal string can only contain 255 characters of
text, so:
on StringToHex(s)
set c to s as C string
try
err of c
on error msg
end try
return msg's text -((s's length) * 2 + 4) thru -5
end
I would appreciate any feed back from users of OSX as to whether
or not this StringToHex() handler works for them, thank you.
{ Arthur Knapp, of <
http://www.STELLARViSIONs.com>
a r t h u r @ s t e l l a r v i s i o n s . c o m
"Safe the Nature" - political graffiti in Prague
}
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