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optimize QString::toLower()/toUpper() for special cases, step 2

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from now, QUnicodeTables::specialCaseMap[] starts with a placeholder; so,
if somethingCaseSpecial is true, then somethingCaseDiff is always greater than 0

Change-Id: Ibb1870512836eee71b1521564c0745096c05b2f9
Merge-request: 70
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
Reviewed-by: Olivier
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
This commit is contained in:
Konstantin Ritt 2011-10-18 19:12:21 +02:00 committed by Qt by Nokia
parent 5f04962132
commit 9514138a5c
2 changed files with 10 additions and 6 deletions
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6
src/corelib/tools/qstring.cpp
View File

@ -4906,7 +4906,7 @@ QString QString::toLower() const
} else {
prop = qGetProp(*p);
}
if (prop->lowerCaseDiff || prop->lowerCaseSpecial) {
if (prop->lowerCaseDiff) {
if (QChar::isLowSurrogate(*p))
--p; // safe; diff is 0 for surrogates
QString s(d->size, Qt::Uninitialized);
@ -4967,7 +4967,7 @@ QString QString::toCaseFolded() const
} else {
prop = qGetProp(*p);
}
if (prop->caseFoldDiff || prop->caseFoldSpecial) {
if (prop->caseFoldDiff) {
if (QChar::isLowSurrogate(*p))
--p; // safe; diff is 0 for surrogates
QString s(d->size, Qt::Uninitialized);
@ -5028,7 +5028,7 @@ QString QString::toUpper() const
} else {
prop = qGetProp(*p);
}
if (prop->upperCaseDiff || prop->upperCaseSpecial) {
if (prop->upperCaseDiff) {
if (QChar::isLowSurrogate(*p))
--p; // safe; diff is 0 for surrogates
QString s(d->size, Qt::Uninitialized);

10
util/unicode/main.cpp
View File

@ -476,7 +476,10 @@ static int appendToSpecialCaseMap(const QList<int> &map)
utf16map.prepend(length);
specialCaseMaxLen = qMax(specialCaseMaxLen, length);
int i = 0;
if (specialCaseMap.isEmpty())
specialCaseMap << 0; // placeholder
int i = 1;
while (i < specialCaseMap.size()) {
int n = specialCaseMap.at(i);
if (n == length) {
@ -2251,8 +2254,9 @@ static QByteArray createPropertyInfo()
"}\n\n";
out += "static const ushort specialCaseMap[] = {";
int i = 0;
out += "static const ushort specialCaseMap[] = {\n";
out += " 0x0, // placeholder";
int i = 1;
while (i < specialCaseMap.size()) {
out += "\n ";
int n = specialCaseMap.at(i);