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ICU-4211 fix broken reverse implementation

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X-SVN-Rev: 16786
This commit is contained in:
Doug Felt 2004-11-05 22:44:26 +00:00
parent 45752fe8c0
commit 61eede6243
1 changed files with 16 additions and 17 deletions
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33
icu4j/src/com/ibm/icu/text/UTF16.java
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@ -2156,23 +2156,22 @@ public final class UTF16
*/
public static StringBuffer reverse(StringBuffer source)
{
StringBuffer result = source.reverse();
int resultLength = result.length();
int maxLeadLength = resultLength - 2;
int i = 0;
while (i < resultLength) {
if (i <= maxLeadLength && isTrailSurrogate(result.charAt(i)) &&
isLeadSurrogate(result.charAt(i + 1))) {
char trail = result.charAt(i);
result.deleteCharAt(i);
result.insert(i + 1, trail);
i += 2;
}
else {
i ++;
}
}
return result;
int length = source.length();
StringBuffer result = new StringBuffer(length);
for (int i = length; i-- > 0;) {
char ch = source.charAt(i);
if (isTrailSurrogate(ch) && i > 0) {
char ch2 = source.charAt(i-1);
if (isLeadSurrogate(ch2)) {
result.append(ch2);
result.append(ch);
--i;
continue;
}
}
result.append(ch);
}
return result;
}
/**