[Chicken-users] UTF8 egg case conversion problem

[Mehmet Köse]

Hi everyone,

utf8-string-downcase cannot convert "Latin Letter With Dot Above"
correctly. (U-0130, only Turkish has this letter afaik.) This one-line
patch fixes the problem for me:

--- utf8-case-map.scm.orig      2011-01-04 00:08:10.559095845 +0200
+++ utf8-case-map.scm   2011-01-04 00:28:16.022095891 +0200
@@ -267,7 +267,7 @@
      ((#x00CD) (and (lang? opt "lt") dotted-small-i/acute))
      ((#x0128) (and (lang? opt "lt") dotted-small-i/tilde))
      ;; Turkish and Azeri
-     ((#x0130) (if (lang? opt "tr" "az") #\I dotted-small-i))
+     ((#x0130) (if (lang? opt "tr" "az") #\i dotted-capital-i))
      ((#x0307) (and (lang? opt "tr" "az") ""))
      ((#x0049) (and (lang? opt "tr" "az") dotless-small-i))
      (else #f))

I also tried to understand what this dotted-small-i (U-0307) does with no luck.
Here is what we use for our "two distinct letters instead of I and i" problem,
in practice:

small: i (U-0069)  capital: İ (U-0130)
small: ı (U-0131)  capital: I (U-0049)

Mehmet Kose.