qlocale.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

    success by setting *ok to true.

    This function ignores leading and trailing whitespace.

    \sa toUShort(), toString()
*/

short QLocale::toShort(const QString &s, bool *ok, int base) const
{
    qlonglong i = toLongLong(s, ok, base);
    if (i < SHRT_MIN || i > SHRT_MAX) {
        if (ok != 0)
            *ok = false;
        return 0;
    }
    return short(i);
}

/*!
    Returns the unsigned short int represented by the localized string
    \a s, using base \a base. If \a base is 0 the base is determined
    automatically using the following rules: If the string begins with
    "0x", it is assumed to be hexadecimal; if it begins with "0", it
    is assumed to be octal; otherwise it is assumed to be decimal.

    If the conversion fails the function returns 0.

    If \a ok is not 0, failure is reported by setting *ok to false, and
    success by setting *ok to true.

    This function ignores leading and trailing whitespace.

    \sa toShort(), toString()
*/

ushort QLocale::toUShort(const QString &s, bool *ok, int base) const
{
    qulonglong i = toULongLong(s, ok, base);
    if (i > USHRT_MAX) {
        if (ok != 0)
            *ok = false;
        return 0;
    }
    return ushort(i);
}

/*!
    Returns the int represented by the localized string \a s, using
    base \a base. If \a base is 0 the base is determined automatically
    using the following rules: If the string begins with "0x", it is
    assumed to be hexadecimal; if it begins with "0", it is assumed to
    be octal; otherwise it is assumed to be decimal.

    If the conversion fails the function returns 0.

    If \a ok is not 0, failure is reported by setting *ok to false, and
    success by setting *ok to true.

    This function ignores leading and trailing whitespace.

    \sa toUInt(), toString()
*/

int QLocale::toInt(const QString &s, bool *ok, int base) const
{
    qlonglong i = toLongLong(s, ok, base);
    if (i < INT_MIN || i > INT_MAX) {
        if (ok != 0)
            *ok = false;
        return 0;
    }
    return int(i);
}

/*!
    Returns the unsigned int represented by the localized string \a s,
    using base \a base. If \a base is 0 the base is determined
    automatically using the following rules: If the string begins with
    "0x", it is assumed to be hexadecimal; if it begins with "0", it
    is assumed to be octal; otherwise it is assumed to be decimal.

    If the conversion fails the function returns 0.

    If \a ok is not 0, failure is reported by setting *ok to false, and
    success by setting *ok to true.

    This function ignores leading and trailing whitespace.

    \sa toInt(), toString()
*/

uint QLocale::toUInt(const QString &s, bool *ok, int base) const
{
    qulonglong i = toULongLong(s, ok, base);
    if (i > UINT_MAX) {
        if (ok != 0)
            *ok = false;
        return 0;
    }
    return uint(i);
}

/*!
    Returns the long long int represented by the localized string \a
    s, using base \a base. If \a base is 0 the base is determined
    automatically using the following rules: If the string begins with
    "0x", it is assumed to be hexadecimal; if it begins with "0", it
    is assumed to be octal; otherwise it is assumed to be decimal.

    If the conversion fails the function returns 0.

    If \a ok is not 0, failure is reported by setting *ok to false, and
    success by setting *ok to true.

    This function ignores leading and trailing whitespace.

    \sa toInt(), toULongLong(), toDouble(), toString()
*/


qlonglong QLocale::toLongLong(const QString &s, bool *ok, int base) const
{
    return d->stringToLongLong(s, base, ok, QLocalePrivate::ParseGroupSeparators);
}

/*!
    Returns the unsigned long long int represented by the localized
    string \a s, using base \a base. If \a base is 0 the base is
    determined automatically using the following rules: If the string
    begins with "0x", it is assumed to be hexadecimal; if it begins
    with "0", it is assumed to be octal; otherwise it is assumed to be
    decimal.

    If the conversion fails the function returns 0.

    If \a ok is not 0, failure is reported by setting *ok to false, and
    success by setting *ok to true.

    This function ignores leading and trailing whitespace.

    \sa toLongLong(), toInt(), toDouble(), toString()
*/

qlonglong QLocale::toULongLong(const QString &s, bool *ok, int base) const
{
    return d->stringToUnsLongLong(s, base, ok, QLocalePrivate::ParseGroupSeparators);
}

/*!
    Returns the float represented by the localized string \a s, or 0.0
    if the conversion failed.

    If \a ok is not 0, reports failure by setting
    *ok to false and success by setting *ok to true.

    This function ignores leading and trailing whitespace.

    \sa toDouble(), toInt(), toString()
*/

#define QT_MAX_FLOAT 3.4028234663852886e+38

float QLocale::toFloat(const QString &s, bool *ok) const
{
    bool myOk;
    double d = toDouble(s, &myOk);
    if (!myOk || d > QT_MAX_FLOAT || d < -QT_MAX_FLOAT) {
        if (ok != 0)
            *ok = false;
        return 0.0;
    }
    if (ok != 0)
        *ok = true;
    return float(d);
}

/*!
    Returns the double represented by the localized string \a s, or
    0.0 if the conversion failed.

    If \a ok is not 0, reports failure by setting
    *ok to false and success by setting *ok to true.

    Unlike QString::toDouble(), this function does not fall back to
    the "C" locale if the string cannot be interpreted in this
    locale.

    \code
        bool ok;
        double d;

        QLocale c(QLocale::C);
        d = c.toDouble( "1234.56", &ok );  // ok == true, d == 1234.56
        d = c.toDouble( "1,234.56", &ok ); // ok == true, d == 1234.56
        d = c.toDouble( "1234,56", &ok );  // ok == false

        QLocale german(QLocale::German);
        d = german.toDouble( "1234,56", &ok );  // ok == true, d == 1234.56
        d = german.toDouble( "1.234,56", &ok ); // ok == true, d == 1234.56
        d = german.toDouble( "1234.56", &ok );  // ok == false

        d = german.toDouble( "1.234", &ok );    // ok == true, d == 1234.0
    \endcode

    Notice that the last conversion returns 1234.0, because '.' is the
    thousands group separator in the German locale.

    This function ignores leading and trailing whitespace.

    \sa toFloat(), toInt(), toString()
*/

double QLocale::toDouble(const QString &s, bool *ok) const
{
    return d->stringToDouble(s, ok, QLocalePrivate::ParseGroupSeparators);
}

/*!
    Returns a localized string representation of \a i.

    \sa toLongLong()
*/

QString QLocale::toString(qlonglong i) const
{
    return d->longLongToString(i, -1, 10, -1, QLocalePrivate::ThousandsGroup);
}

/*!
    \overload

    \sa toULongLong()
*/

QString QLocale::toString(qulonglong i) const
{
    return d->unsLongLongToString(i, -1, 10, -1, QLocalePrivate::ThousandsGroup);
}

/*!
    Returns a localized string representation of the given \a date in the
    specified \a format.
    If \a format is an empty string, an empty string is returned.
*/

QString QLocale::toString(const QDate &date, const QString &format) const
{
    QString result;

    int i = 0;
    while (i < format.size()) {
        if (format.at(i).unicode() == '\'') {
            result.append(readEscapedFormatString(format, &i));
            continue;
        }

        QChar c = format.at(i);
        int repeat = repeatCount(format, i);

        switch (c.unicode()) {
            case 'y':
                if (repeat >= 4)
                    repeat = 4;
                else if (repeat >= 2)
                    repeat = 2;

                switch (repeat) {
                    case 4:
                        result.append(d->longLongToString(date.year()));
                        break;
                    case 2:
                        result.append(d->longLongToString(date.year()%100, -1, 10, 2, QLocalePrivate::ZeroPadded));
                        break;
                    default:
                        repeat = 1;
                        result.append(c);
                        break;
                }
                break;

            case 'M':
                if (repeat > 4)
                    repeat = 4;
                switch (repeat) {
                    case 1:
                        result.append(d->longLongToString(date.month()));
                        break;
                    case 2:
                        result.append(d->longLongToString(date.month(), -1, 10, 2, QLocalePrivate::ZeroPadded));
                        break;
                    case 3:
                        result.append(d->month(date.month() - 1, true));
                        break;
                    case 4:
                        result.append(d->month(date.month() - 1));
                        break;
                }
                break;

            case 'd':
                if (repeat > 4)
                    repeat = 4;
                switch (repeat) {
                    case 1:
                        result.append(d->longLongToString(date.day()));
                        break;
                    case 2:
                        result.append(d->longLongToString(date.day(), -1, 10, 2, QLocalePrivate::ZeroPadded));
                        break;
                    case 3:
                        result.append(d->day(date.dayOfWeek(), true));
                        break;
                    case 4:
                        result.append(d->day(date.dayOfWeek()));
                        break;
                }
                break;

            default:
                result.append(QString(repeat, c));
                break;
        }

        i += repeat;
    }

    return result;
}

/*!
    Returns a localized string representation of the given \a date according
    to the specified \a format.
*/
QString QLocale::toString(const QDate &date, FormatType format) const
{
#ifndef QT_USE_DATABASE
    if (d == systemLocale())
        return systemDateToString(date, format);
#endif

    QString format_str = dateFormat(format);
    return toString(date, format_str);
}

static bool timeFormatContainsAP(const QString &format)
{
    int i = 0;
    while (i + 1 < format.size()) {
        if (format.at(i).unicode() == '\'') {
            readEscapedFormatString(format, &i);
            continue;
        }

        QChar c1 = format.at(i);
        QChar c2 = format.at(i + 1);
        if (c1.unicode() == 'a' && c2.unicode() == 'p'
            || c1.unicode() == 'A' && c2.unicode() == 'P')
            return true;

        ++i;
    }
    return false;
}

static QString timeZone()
{
#ifdef Q_OS_WIN
    _tzset();
# if defined(_MSC_VER) && _MSC_VER >= 1400
    size_t returnSize = 0;
    char timeZoneName[512];
    if (_get_tzname(&returnSize, timeZoneName, 512, 1))
        return QString();
    return QString::fromLocal8Bit(timeZoneName);
# else
    return QString::fromLocal8Bit(_tzname[1]);
# endif
#else
    tzset();
    return QString::fromLocal8Bit(tzname[1]);
#endif
}

/*!
    Returns a localized string representation of the given \a time according
    to the specified \a format.
    If \a format is an empty string, an empty string is returned.
*/
QString QLocale::toString(const QTime &time, const QString &format) const
{
    QString result;

    int hour12 = time.hour();
    enum { AM, PM } am_pm = AM;
    if (hour12 == 0) {
        am_pm = AM;
        hour12 = 12;
    } else if (hour12 < 12) {
        am_pm = AM;
    } else if (hour12 == 12) {
        am_pm = PM;
    } else {
        am_pm = PM;
        hour12 -= 12;
    }

    bool format_am_pm = timeFormatContainsAP(format);

    int i = 0;

    while (i < format.size()) {
        if (format.at(i).unicode() == '\'') {
            result.append(readEscapedFormatString(format, &i));
            continue;
        }

        QChar c = format.at(i);
        int repeat = repeatCount(format, i);

        switch (c.unicode()) {
            case 'h': {
                if (repeat > 2)
                    repeat = 2;

                int hour = format_am_pm ? hour12 : time.hour();

                switch (repeat) {
                    case 1:
                        result.append(d->longLongToString(hour));
                        break;
                    case 2:
                        result.append(d->longLongToString(hour, -1, 10, 2, QLocalePrivate::ZeroPadded));
                        break;
                }
                break;
            }
            case 'H':
                if (repeat > 2)
                    repeat = 2;

                switch (repeat) {
                    case 1:
                        result.append(d->longLongToString(time.hour()));
                        break;
                    case 2:
                        result.append(d->longLongToString(time.hour(), -1, 10, 2, QLocalePrivate::ZeroPadded));
                        break;
                }
                break;

            case 'm':
                if (repeat > 2)
                    repeat = 2;
                switch (repeat) {
                    case 1:
                        result.append(d->longLongToString(time.minute()));
                        break;
                    case 2:
                        result.append(d->longLongToString(time.minute(), -1, 10, 2, QLocalePrivate::ZeroPadded));
                        break;
                }
                break;

            case 's':
                if (repeat > 2)
                    repeat = 2;
                switch (repeat) {
                    case 1:
                        result.append(d->longLongToString(time.secon