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QUrl stringprep: recalculate the current position if the size changes

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If the case folding operation results in either expansion or reduction
of the string, we need to adapt. Reduction happens most often when a
non-BMP character is case-folded to a character in the BMP (example:
mathematical signs at U+1D400-1D7FF). Expansion happens in the rare
case of symbols containing words, like U+2121 ℡ (this is part of the
unit test), and one common case: the German sharp S (ß) is expanded to
"ss".

Change-Id: I1bdbdc908b958a89bf30e4bb648d65dfdd9097f8
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
This commit is contained in:
Thiago Macieira 2013-06-07 18:39:12 -07:00 committed by The Qt Project
parent d4dba8a5c4
commit 2ccf4c32cc
1 changed files with 2 additions and 1 deletions
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3
src/corelib/io/qurlidna.cpp
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@ -1472,7 +1472,8 @@ static void mapToLowerCase(QString *str, int from)
if (uc <= 0xffff)
str->replace(i, 1, reinterpret_cast<const QChar *>(&entry->mapping[0]), l);
else
str->replace(i-1, 2, reinterpret_cast<const QChar *>(&entry->mapping[0]), l);
str->replace(--i, 2, reinterpret_cast<const QChar *>(&entry->mapping[0]), l);
i += l - 1;
d = 0;
} else {
if (!d)