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reimplement locale name to language, script and country splitting via ICU

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Signed-off-by: Ivailo Monev <xakepa10@laimg.moc>
This commit is contained in:
Ivailo Monev 2020-01-04 01:06:23 +00:00
parent ef0c068818
commit 118bbe0109
1 changed files with 31 additions and 72 deletions
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103
src/core/tools/qlocale.cpp
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@ -232,81 +232,40 @@ const QLocalePrivate *QLocalePrivate::findLocale(QLocale::Language language, QLo
return &localeTbl[0]; return &localeTbl[0];
} }
static const int bcp47max = 11; // worst case according to BCP47
static bool parse_locale_tag(const QString &input, int &i, QString *result, const QString &separators)
{
*result = QString(bcp47max, Qt::Uninitialized);
QChar *pch = result->data();
const QChar *uc = input.data() + i;
const int l = input.length();
int size = 0;
for (; i < l && size < bcp47max; ++i, ++size) {
if (separators.contains(*uc))
break;
if (! ((uc->unicode() >= 'a' && uc->unicode() <= 'z') ||
(uc->unicode() >= 'A' && uc->unicode() <= 'Z') ||
(uc->unicode() >= '0' && uc->unicode() <= '9')) ) // latin only
return false;
*pch++ = *uc++;
}
result->truncate(size);
return true;
}
bool qt_splitLocaleName(const QString &name, QString &lang, QString &script, QString &cntry) bool qt_splitLocaleName(const QString &name, QString &lang, QString &script, QString &cntry)
{ {
const int length = name.length(); const QByteArray latinname = name.toLatin1();
char getbuffer[20];
lang = script = cntry = QString(); UErrorCode error = U_ZERO_ERROR;
const int langresult = uloc_getLanguage(latinname.constData(), getbuffer, sizeof(getbuffer), &error);
const QString separators = QLatin1String("_-.@"); if (Q_UNLIKELY(U_FAILURE(error))) {
enum ParserState { NoState, LangState, ScriptState, CountryState }; qWarning("qt_splitLocaleName: uloc_getLanguage(%s) failed %s",
ParserState state = LangState; latinname.constData(), u_errorName(error));
for (int i = 0; i < length && state != NoState; ) { return false;
QString value;
if (!parse_locale_tag(name, i, &value, separators) ||value.isEmpty())
break;
QChar sep = i < length ? name.at(i) : QChar();
switch (state) {
case LangState:
if (!sep.isNull() && !separators.contains(sep)) {
state = NoState;
break;
}
lang = value;
if (i == length) {
// just language was specified
state = NoState;
break;
}
state = ScriptState;
break;
case ScriptState: {
// if it wasn't a script, maybe it is a country then?
cntry = value;
state = NoState;
for (qint16 ii = 0; ii < scriptTblSize; ii++) {
if (QString::fromLatin1(scriptTbl[ii].code) == value) {
script = value;
state = CountryState;
break;
}
}
break;
}
case CountryState:
cntry = value;
state = NoState;
break;
case NoState:
// shouldn't happen
qWarning("QLocale: This should never happen");
break;
}
++i;
} }
return lang.length() == 2 || lang.length() == 3; lang = QString::fromLatin1(getbuffer, langresult);
error = U_ZERO_ERROR;
memset(getbuffer, 0, sizeof(getbuffer));
const int scriptresult = uloc_getScript(latinname.constData(), getbuffer, sizeof(getbuffer), &error);
if (Q_UNLIKELY(U_FAILURE(error))) {
qWarning("qt_splitLocaleName: uloc_getScript(%s) failed %s",
latinname.constData(), u_errorName(error));
return false;
}
script = QString::fromLatin1(getbuffer, scriptresult);
error = U_ZERO_ERROR;
memset(getbuffer, 0, sizeof(getbuffer));
const int countryresult = uloc_getCountry(latinname.constData(), getbuffer, sizeof(getbuffer), &error);
if (Q_UNLIKELY(U_FAILURE(error))) {
qWarning("qt_splitLocaleName: uloc_getCountry(%s) failed %s",
latinname.constData(), u_errorName(error));
return false;
}
cntry = QString::fromLatin1(getbuffer, countryresult);
return true;
} }
void QLocalePrivate::getLangAndCountry(const QString &name, QLocale::Language &lang, void QLocalePrivate::getLangAndCountry(const QString &name, QLocale::Language &lang,