C++ QLatin1String::size方法代码示例

bool parseIntOption(const QString &parameter,const QLatin1String &option,
                    IntType minimumValue, IntType maximumValue, IntType *target)
{
    const int valueLength = parameter.size() - option.size() - 1;
    if (valueLength < 1 || !parameter.startsWith(option) || parameter.at(option.size()) != QLatin1Char('='))
        return false;
    bool ok;
    const QStringRef valueRef = parameter.rightRef(valueLength);
    const int value = valueRef.toInt(&ok);
    if (ok) {
        if (value >= minimumValue && value <= maximumValue)
            *target = static_cast<IntType>(value);
        else {
            qWarning() << "Value" << value << "for option" << option << "out of range"
                << minimumValue << ".." << maximumValue;
        }
    } else {
        qWarning() << "Invalid value" << valueRef << "for option" << option;
    }
    return true;
}

Telegram::Peer Telegram::Peer::fromString(const QString &string)
{
    // Possible schemes: user1234, chat1234, channel1234
    if (string.length() < 5) {
        return Peer();
    }
    bool ok = true;
    switch (string.at(0).toLatin1()) {
    case 'u': // user
        if (string.startsWith(c_userPrefix)) {
            uint userId = string.midRef(c_userPrefix.size()).toUInt(&ok);
            if (ok) {
                return Peer::fromUserId(userId);
            }
        }
        break;
    case 'c': // chat or channel
        if (string.at(3).toLatin1() == 't') {
            if (string.startsWith(c_chatPrefix)) {
                uint chatId = string.midRef(c_chatPrefix.size()).toUInt(&ok);
                if (ok) {
                    return Peer::fromChatId(chatId);
                }
            }
        } else {
            if (string.startsWith(c_channelPrefix)) {
                uint channelId = string.midRef(c_channelPrefix.size()).toUInt(&ok);
                if (ok) {
                    return Peer::fromChannelId(channelId);
                }
            }
        }
        break;
    default:
        break;
    }
    return Peer();
}

void CMakeCbpParser::parseBuildTargetOption()
{
    if (attributes().hasAttribute(QLatin1String("output"))) {
        m_buildTarget.executable = attributes().value(QLatin1String("output")).toString();
        CMakeTool *tool = CMakeKitInformation::cmakeTool(m_kit);
        if (tool)
            m_buildTarget.executable = tool->mapAllPaths(m_kit, m_buildTarget.executable);
    } else if (attributes().hasAttribute(QLatin1String("type"))) {
        const QStringRef value = attributes().value(QLatin1String("type"));
        if (value == QLatin1String("2") || value == QLatin1String("3"))
            m_buildTarget.targetType = TargetType(value.toInt());
    } else if (attributes().hasAttribute(QLatin1String("working_dir"))) {
        m_buildTarget.workingDirectory = attributes().value(QLatin1String("working_dir")).toString();

        QFile cmakeSourceInfoFile(m_buildTarget.workingDirectory
                                  + QStringLiteral("/CMakeFiles/CMakeDirectoryInformation.cmake"));
        if (cmakeSourceInfoFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
            QTextStream stream(&cmakeSourceInfoFile);
            const QLatin1String searchSource("SET(CMAKE_RELATIVE_PATH_TOP_SOURCE \"");
            while (!stream.atEnd()) {
                const QString lineTopSource = stream.readLine().trimmed();
                if (lineTopSource.startsWith(searchSource)) {
                    m_buildTarget.sourceDirectory = lineTopSource.mid(searchSource.size());
                    m_buildTarget.sourceDirectory.chop(2); // cut off ")
                    break;
                }
            }
        }

        if (m_buildTarget.sourceDirectory.isEmpty()) {
            QDir dir(m_buildDirectory);
            const QString relative = dir.relativeFilePath(m_buildTarget.workingDirectory);
            m_buildTarget.sourceDirectory
                    = FileName::fromString(m_sourceDirectory).appendPath(relative).toString();
        }
    }
    while (!atEnd()) {
        readNext();
        if (isEndElement())
            return;
        else if (isStartElement())
            parseUnknownElement();
    }
}

bool OsmAnd::WorldRegions_P::loadWorldRegions(
    QHash< QString, std::shared_ptr<const WorldRegion> >& outRegions,
    const IQueryController* const controller) const
{
    const std::shared_ptr<QIODevice> ocbfFile(new QFile(owner->ocbfFileName));
    if (!ocbfFile->open(QIODevice::ReadOnly))
        return false;

    const std::shared_ptr<ObfReader> ocbfReader(new ObfReader(ocbfFile));
    const auto& obfInfo = ocbfReader->obtainInfo();
    if (!obfInfo)
    {
        ocbfFile->close();

        return false;
    }

    for(const auto& mapSection : constOf(obfInfo->mapSections))
    {
        // Check if request is aborted
        if (controller && controller->isAborted())
        {
            ocbfFile->close();

            return false;
        }

        bool idsCaptured = false;
        uint32_t nameId = std::numeric_limits<uint32_t>::max();
        uint32_t idId = std::numeric_limits<uint32_t>::max();
        uint32_t downloadNameId = std::numeric_limits<uint32_t>::max();
        uint32_t regionPrefixId = std::numeric_limits<uint32_t>::max();
        uint32_t regionSuffixId = std::numeric_limits<uint32_t>::max();
        const QLatin1String localizedNameTagPrefix("name:");
        const auto localizedNameTagPrefixLen = localizedNameTagPrefix.size();
        const auto worldRegionsCollector =
            [&outRegions, &idsCaptured, &nameId, &idId, &downloadNameId, &regionPrefixId, &regionSuffixId, localizedNameTagPrefix, localizedNameTagPrefixLen]
            (const std::shared_ptr<const OsmAnd::Model::BinaryMapObject>& worldRegionMapObject) -> bool
            {
                const auto& rules = worldRegionMapObject->section->encodingDecodingRules;
                if (!idsCaptured)
                {
                    nameId = rules->name_encodingRuleId;

                    QHash< QString, QHash<QString, uint32_t> >::const_iterator citRule;
                    if ((citRule = rules->encodingRuleIds.constFind(QLatin1String("key_name"))) != rules->encodingRuleIds.cend())
                        idId = citRule->constBegin().value();
                    if ((citRule = rules->encodingRuleIds.constFind(QLatin1String("download_name"))) != rules->encodingRuleIds.cend())
                        downloadNameId = citRule->constBegin().value();
                    if ((citRule = rules->encodingRuleIds.constFind(QLatin1String("region_prefix"))) != rules->encodingRuleIds.cend())
                        regionPrefixId = citRule->constBegin().value();
                    if ((citRule = rules->encodingRuleIds.constFind(QLatin1String("region_suffix"))) != rules->encodingRuleIds.cend())
                        regionSuffixId = citRule->constBegin().value();

                    idsCaptured = true;
                }

                QString name;
                QString id;
                QString downloadName;
                QString regionPrefix;
                QString regionSuffix;
                QHash<QString, QString> localizedNames;
                for(const auto& localizedNameEntry : rangeOf(constOf(worldRegionMapObject->names)))
                {
                    const auto ruleId = localizedNameEntry.key();
                    if (ruleId == idId)
                    {
                        id = localizedNameEntry.value().toLower();
                        continue;
                    }
                    else if (ruleId == nameId)
                    {
                        name = localizedNameEntry.value();
                        continue;
                    }
                    else if (ruleId == downloadNameId)
                    {
                        downloadName = localizedNameEntry.value().toLower();
                        continue;
                    }
                    else if (ruleId == regionPrefixId)
                    {
                        regionPrefix = localizedNameEntry.value().toLower();
                        continue;
                    }
                    else if (ruleId == regionSuffixId)
                    {
                        regionSuffix = localizedNameEntry.value().toLower();
                        continue;
                    }

                    const auto& nameTag = rules->decodingRules[localizedNameEntry.key()].tag;
                    if (!nameTag.startsWith(localizedNameTagPrefix))
                        continue;
                    const auto languageId = nameTag.mid(localizedNameTagPrefixLen).toLower();
                    localizedNames.insert(languageId, localizedNameEntry.value());
                }

                QString parentId = regionSuffix;
//.........这里部分代码省略.........

QString bytesToUtf8(QLatin1String bytes) {
	return QString::fromUtf8(bytes.data(), bytes.size());
}