Checking legality of a string

[Eric Chatonet]

Hi Graham,

If your string is not 3000 chars long, you could just test the ASCII  
code of each char:

function RightStr pStr
   local tChar,tCharToNum
   -----
   repeat for each char tChar in pStr
     put charToNum(tChar) into tCharToNum
     if not (tCharToNum = 95 \
         or (tCharToNum >= 48 and tCharToNum <= 57) \
         or (tCharToNum >= 65 and tCharToNum <= 90) \
         or (tCharToNum >= 97 and tCharToNum <= 122)) then return false
   end repeat
   return true
end RightStr

Then

if not RightStr(<string>) then <statements> -- not a right string
else <other statements>

I think that there should be also a solution using matchText :-)
If you are interested in ASCCI code, look at charToNum and numToChar  
functions.
On the other hand, ASCII Picker, an utility you will find on my  
website might help you.

Le 25 janv. 06 à 16:25, graham samuel a écrit :

> What's the most economical way of checking that a string contains  
> only certain characters? I'm just trying to check if a string  
> contains letters, digits and underscores, and nothing else. The  
> ways I've thought of doing it seem clunky. Basically I want to script
>
> if myString contains only <list of legal characters> then...
>
> Just can't see the slick way of doing it. Maybe I should go outside  
> and check for mole damage instead...

Best Regards from Paris,
Eric Chatonet
------------------------------------------------------------------------ 
----------------------
http://www.sosmartsoftware.com/    eric.chatonet at sosmartsoftware.com/