[luatex] problem with slnunicode's find

[luigi scarso]

On Wed, Mar 3, 2010 at 5:18 PM, Stephan Hennig <mailing_list at arcor.de> wrote:
>
> My original problem has already been solved by the function posted in my
> second mail.[1]  Here's a slightly modified version:
>
> function utf8_find(str, pattern, init)
>    local s = unicode.utf8.sub(str, init)
>    -- search for first occurrence of pattern
>    s = unicode.utf8.match(s, "^.-" .. pattern)
>    -- calculate end point of match
>    local e = s and init + unicode.utf8.len(s) - 1
>    -- calculate beginning of match
>    local b = e and e - unicode.utf8.len(pattern) + 1
>    -- return indices of found match, or nil
>    return b, e
> end

I like this one because it's not mixed with string.*:
we all know that unicode.utf8.match
operate  in "octect point of view mode "
and unicode.utf8.len in "unicode  point of view mode" .




-- 
luigi