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ICU-4399 fix simple case folding of U+0130: simple-case-folds to itself because it's not mentioned in CaseFolding.txt

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X-SVN-Rev: 17482
This commit is contained in:
Markus Scherer 2005-04-16 05:18:18 +00:00
parent 8ec2837d6b
commit 6c4ccc015e
1 changed files with 3 additions and 11 deletions
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14
icu4c/source/common/ucase.c
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@ -1421,15 +1421,7 @@ ucase_toFullTitle(const UCaseProps *csp, UChar32 c,
0049; C; 0069; # LATIN CAPITAL LETTER I
0130; F; 0069 0307; # LATIN CAPITAL LETTER I WITH DOT ABOVE
* U+0130 is otherwise lowercased to U+0069 (UnicodeData.txt).
*
* In case this code is used with CaseFolding.txt from an older version of Unicode
* where CaseFolding.txt contains mappings with a status of 'I' that
* have the opposite polarity ('I' mappings are included by default but excluded for Turkic),
* we must also hardcode the Unicode 3.2 mappings for the code points
* with 'I' mappings.
* Unicode 3.1.1 has 'I' mappings for U+0130 and U+0131.
* Unicode 3.2 has a 'T' mapping for U+0130, and lowercases U+0131 to itself (see UnicodeData.txt).
* U+0130 has no simple case folding (simple-case-folds to itself).
*/
/* return the simple case folding mapping for c */
@ -1453,8 +1445,8 @@ ucase_fold(UCaseProps *csp, UChar32 c, uint32_t options) {
/* 0049; C; 0069; # LATIN CAPITAL LETTER I */
return 0x69;
} else if(c==0x130) {
/* no simple default mapping for U+0130, use UnicodeData.txt */
return 0x69;
/* no simple case folding for U+0130 */
return c;
}
} else {
/* Turkic mappings */