Re: problem with regexp:regexp-split

> On 15 Dec 2016, at 23:55, Jean Louis <[email protected]> wrote:
> 
> Hello,
> 
> I have some problem in understanding.
> 
> (defparameter latitude "6° 45' 22.90\"    S")
> (defparameter longitude "35° 7' 23.60\"  E")
> 
> (regexp:regexp-split " " latitude)
> => ("6° " "5'" "22.90\"" "" "" "" "S")
> 
> That was my expected output for latitude, but I get problem with
> longitude:
> 
> (regexp:regexp-split " " longitude)
> => ("35° " "'" "23.60\"" "" "E")
> 
> So that is not the expected value for longitude, and I don't know what
> to do to make it happen, as I miss the number "7" there.



You also miss the 4 in the latitude, and you have superfluous spaces in the first items.

The problem you have is that your strings are converted to UTF-8 when they are passed to the C library regex(7), and the clisp regexp module is confused between the indices returned by regex(7) (which are byte indices), and characters that are decoded from UTF-8 byte sequences.

CL-USER> (setf CUSTOM:*MISC-ENCODING* charset:utf-8)
#<ENCODING CHARSET:UTF-8 :UNIX>
CL-USER> (regexp:regexp-split " " latitude)
("6° " "5'" "22.90\"" "" "" "" "S")
CL-USER> (regexp:regexp-split " " longitude)
("35° " "'" "23.60\"" "" "E")
CL-USER> 

If you convert instead the string into a 1-1 encoding, then it will work correctly:

CL-USER> (setf CUSTOM:*MISC-ENCODING* charset:iso-8859-1)
#<ENCODING CHARSET:ISO-8859-1 :UNIX>
CL-USER> (regexp:regexp-split " " latitude)
("6°" "45'" "22.90\"" "" "" "" "S")
CL-USER> (regexp:regexp-split " " longitude)
("35°" "7'" "23.60\"" "" "E")


https://sourceforge.net/p/clisp/bugs/691/
-- 
__Pascal J. Bourguignon__



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