[fpc-pascal] Re: Widestrings length and character iteration

Christos Chryssochoidis c.chryssochoidis at gmail.com
Mon May 7 17:27:37 CEST 2007

Daniël Mantione wrote:
 > Op Mon, 7 May 2007, schreef Christos Chryssochoidis:
 >> Hi,
 >> Are there any rtl functions to compute the length (in characters) of a
 >> widestring and to iterate over its characters?
 > If you treat it as UCS-2: length(widestring_variable)
 >>  In my system (Mac OS X/fpc 2.1.3), a widestring is implemented as a 
 >> encoded string, as I found out.
 > Not possible, a widestring is UCS-2/UTF-16.

  I defined a widestring with 7 characters (code points), and the 
length() function returned the value 15. Of the 7 code points of that 
widestring only one of them was greater than $07FF (the maximum code 
point which can be encoded in 2 bytes under UTF-8). When I changed that 
character with another one with code not greater than $07FF, length() 
returned value 14... I also printed the byte values of one of the 
widestring's widechars, and the values printed indicated UTF-8 encoding.


 > Daniël
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