Re: Routines for review: Hex <-> String
Re: Routines for review: Hex <-> String
- Subject: Re: Routines for review: Hex <-> String
- From: julifos <email@hidden>
- Date: Sat, 18 Jan 2003 12:08:26 +0100
>
> This is a cool method if you're running Smile, but... Why do you think the
>
> error msg "is rather fragile"? Error messages could change its syntax, but
>
> did they until now?
>
>
I stated so because I was thinking the error message might be
>
different depending on the language, but maybe I'm missing something
>
huge here - it has happened in the past, ?verdad? :-)
>
>
Emmanuel
I don't know? A japanese system should return japanese errors? I don't know.
Can't test it ;-)
Anyway, we can throw an error where we look for the offset of "<<" & ">>" or
where the first word is our data:
"Hello" as C string (or Pascal)
try
exists result
on error msg
--> msg = "<<data cstr48656C6C6F00>> whatever language."
--> play with msg's word 2
end try
But perhaps looking for | (offset of "<<" in msg) + 10 | & | (offset of ">>"
in msg) - 1 | is more accurate...
>
I like this.
>
>
set hex to stringtoHex("hello world")
>
-->{"68", "65", "6c", "6c", "6f", "20", "77", "6f", "72", "6c", "64"}
>
set AppleScript's text item delimiters to "%"
>
HexToString("%" & hex)
>
-->"hello world"
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set AppleScript's text item delimiters to ""
>
>
>
on stringtoHex(s)
>
words 2 thru ((length of s) + 1) of (do shell script "echo " & s & " |
>
hexdump -C")
>
end stringtoHex
Very short code! But this routine is very slow and it won't handle large
strings, unless you say:
text from word 2 of x to word y of x
(quick note off-topic: I've seen that
text from character 1 of x to character 5 of x
If much quicker than
characters 1 thru 5 of x as string
)
>
on HexToString(h)
>
do shell script "echo " & h & " | perl -ple
>
's/%([0-9a-fA-F]{2})/chr(hex($1))/ge' "
>
end HexToString
Hmmm... This doesn't work for me... Do I need install something? It returns:
--> "h656c6c6f20776f726c64"
JJ
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