qtranslator.cpp File Reference

#include "qplatformdefs.h"
#include "qtranslator.h"
#include "qfileinfo.h"
#include "qstring.h"
#include "qstringlist.h"
#include "qcoreapplication.h"
#include "qcoreapplication_p.h"
#include "qdatastream.h"
#include "qdir.h"
#include "qfile.h"
#include "qmap.h"
#include "qalgorithms.h"
#include "qhash.h"
#include "qtranslator_p.h"
#include "qlocale.h"
#include "qresource.h"
#include "private/qcore_unix_p.h"
#include <sys/mman.h>
#include <errno.h>
#include <stdlib.h>
#include "qobject_p.h"

Go to the source code of this file.

Classes
class	QTranslatorPrivate

Macros
#define	CHECK_RANGE
#define	MAP_FAILED   -1
#define	MAP_FILE   0
#define	QT_USE_MMAP

Enumerations
enum	Tag {   Tag_End = 1, Tag_SourceText16, Tag_Translation, Tag_Context16,   Tag_Obsolete1, Tag_SourceText, Tag_Context, Tag_Comment,   Tag_Obsolete2 }

Functions
static uint	elfHash (const char *name)
static QString	find_translation (const QLocale &locale, const QString &filename, const QString &prefix, const QString &directory, const QString &suffix)
static QString	getMessage (const uchar *m, const uchar *end, const char *context, const char *sourceText, const char *comment, int numerus)
static bool	match (const uchar *found, const char *target, uint len)
static int	numerusHelper (int n, const uchar *rules, int rulesSize)
static quint16	read16 (const uchar *data)
static quint32	read32 (const uchar *data)
static quint8	read8 (const uchar *data)

Variables
static const uchar	magic [MagicLength]
static const int	MagicLength = 16

Macro Definition Documentation

CHECK_RANGE

#define CHECK_RANGE

Value:

do { \
        if (i >= rulesSize) \
            return -1; \
    } while (0)

Referenced by numerusHelper().

MAP_FAILED

#define MAP_FAILED   -1

Referenced by QTranslatorPrivate::do_load().

MAP_FILE

#define MAP_FILE   0

Referenced by QTranslatorPrivate::do_load().

QT_USE_MMAP

#define QT_USE_MMAP

Definition at line 64 of file qtranslator.cpp.

Enumeration Type Documentation

Tag

enum Tag

Enumerator
Tag_End
Tag_SourceText16
Tag_Translation
Tag_Context16
Tag_Obsolete1
Tag_SourceText
Tag_Context
Tag_Comment
Tag_Obsolete2

Definition at line 86 of file qtranslator.cpp.

         { Tag_End = 1, Tag_SourceText16, Tag_Translation, Tag_Context16, Tag_Obsolete1,
           Tag_SourceText, Tag_Context, Tag_Comment, Tag_Obsolete2 };

Function Documentation

elfHash()

static uint elfHash ( const char *  name )

static

Definition at line 110 of file qtranslator.cpp.

Referenced by QTranslatorPrivate::do_translate().

{
    const uchar *k;
    uint h = 0;
    uint g;

    if (name) {
        k = (const uchar *) name;
        while (*k) {
            h = (h << 4) + *k++;
            if ((g = (h & 0xf0000000)) != 0)
                h ^= g >> 24;
            h &= ~g;
        }
    }
    if (!h)
        h = 1;
    return h;
}

find_translation()

static QString find_translation ( const QLocale &  locale, const QString &  filename, const QString &  prefix, const QString &  directory, const QString &  suffix  )

static

Definition at line 586 of file qtranslator.cpp.

Referenced by QTranslator::load().

{
    QString path;
    if (QFileInfo(filename).isRelative()) {
        path = directory;
        if (!path.isEmpty() && !path.endsWith(QLatin1Char('/')))
            path += QLatin1Char('/');
    }

    QFileInfo fi;
    QString realname;
    QStringList fuzzyLocales;

    // see http://www.unicode.org/reports/tr35/#LanguageMatching for inspiration

    QStringList languages = locale.uiLanguages();
#if defined(Q_OS_UNIX) && !defined(Q_OS_SYMBIAN)
    for (int i = languages.size()-1; i >= 0; --i) {
        QString lang = languages.at(i);
        QString lowerLang = lang.toLower();
        if (lang != lowerLang)
            languages.insert(i+1, lowerLang);
    }
#endif

    // try explicit locales names first
    foreach (QString localeName, languages) {
        localeName.replace(QLatin1Char('-'), QLatin1Char('_'));

        realname = path + filename + prefix + localeName + (suffix.isNull() ? QLatin1String(".qm") : suffix);
        fi.setFile(realname);
        if (fi.isReadable() && fi.isFile())
            return realname;

        realname = path + filename + prefix + localeName;
        fi.setFile(realname);
        if (fi.isReadable() && fi.isFile())
            return realname;

        fuzzyLocales.append(localeName);
    }

    // start guessing
    foreach (QString localeName, fuzzyLocales) {
        for (;;) {
            int rightmost = localeName.lastIndexOf(QLatin1Char('_'));
            // no truncations? fail
            if (rightmost <= 0)
                break;
            localeName.truncate(rightmost);

            realname = path + filename + prefix + localeName + (suffix.isNull() ? QLatin1String(".qm") : suffix);
            fi.setFile(realname);
            if (fi.isReadable() && fi.isFile())
                return realname;

            realname = path + filename + prefix + localeName;
            fi.setFile(realname);
            if (fi.isReadable() && fi.isFile())
                return realname;
        }
    }

    if (!suffix.isNull()) {
        realname = path + filename + suffix;
        fi.setFile(realname);
        if (fi.isReadable() && fi.isFile())
            return realname;
    }

    realname = path + filename + prefix;
    fi.setFile(realname);
    if (fi.isReadable() && fi.isFile())
        return realname;

    realname = path + filename;
    fi.setFile(realname);
    if (fi.isReadable() && fi.isFile())
        return realname;

    return QString();
}

getMessage()

static QString getMessage ( const uchar *  m, const uchar *  end, const char *  context, const char *  sourceText, const char *  comment, int  numerus  )

static

Definition at line 806 of file qtranslator.cpp.

Referenced by QTranslatorPrivate::do_translate().

{
    const uchar *tn = 0;
    uint tn_length = 0;
    int currentNumerus = -1;

    for (;;) {
        uchar tag = 0;
        if (m < end)
            tag = read8(m++);
        switch((Tag)tag) {
        case Tag_End:
            goto end;
        case Tag_Translation: {
            int len = read32(m);
            if (len % 1)
                return QString();
            m += 4;
            if (++currentNumerus == numerus) {
                tn_length = len;
                tn = m;
            }
            m += len;
            break;
        }
        case Tag_Obsolete1:
            m += 4;
            break;
        case Tag_SourceText: {
            quint32 len = read32(m);
            m += 4;
            if (!match(m, sourceText, len))
                return QString();
            m += len;
        }
            break;
        case Tag_Context: {
            quint32 len = read32(m);
            m += 4;
            if (!match(m, context, len))
                return QString();
            m += len;
        }
            break;
        case Tag_Comment: {
            quint32 len = read32(m);
            m += 4;
            if (*m && !match(m, comment, len))
                return QString();
            m += len;
        }
            break;
        default:
            return QString();
        }
    }
end:
    if (!tn)
        return QString();
    QString str = QString((const QChar *)tn, tn_length/2);
    if (QSysInfo::ByteOrder == QSysInfo::LittleEndian) {
        for (int i = 0; i < str.length(); ++i)
            str[i] = QChar((str.at(i).unicode() >> 8) + ((str.at(i).unicode() << 8) & 0xff00));
    }
    return str;
}

match()

static bool match ( const uchar *  found, const char *  target, uint  len  )

static

Definition at line 101 of file qtranslator.cpp.

Referenced by QDBusAbstractInterface::callWithArgumentList(), QTranslatorPrivate::do_translate(), QRegExpMatchState::drain(), findEncoding(), QFontDatabase::findFont(), getFcPattern(), QGraphicsAnchorLayoutPrivate::getGraphParts(), getMessage(), QTreeView::keyboardSearch(), QAbstractItemView::keyboardSearch(), QFontEngineMultiFT::loadEngine(), loadFc(), loadWin(), QFontDatabase::loadXlfd(), QResourceRoot::mappingRoot(), QShortcutMap::matches(), QKeySequence::matches(), QRegExpAutomatonState::QRegExpAutomatonState(), registerFont(), QCss::StyleSelector::selectorMatches(), QEglContext::setApi(), QAbstractItemModel::sibling(), and QDir::temp().

{
    // catch the case if \a found has a zero-terminating symbol and \a len includes it.
    // (normalize it to be without the zero-terminating symbol)
    if (len > 0 && found[len-1] == '\0')
        --len;
    return (memcmp(found, target, len) == 0 && target[len] == '\0');
}

numerusHelper()

static int numerusHelper ( int  n, const uchar *  rules, int  rulesSize  )

static

Definition at line 130 of file qtranslator.cpp.

Referenced by QTranslatorPrivate::do_translate().

{
#define CHECK_RANGE \
    do { \
        if (i >= rulesSize) \
            return -1; \
    } while (0)

    int result = 0;
    int i = 0;

    if (rulesSize == 0)
        return 0;

    for (;;) {
        bool orExprTruthValue = false;

        for (;;) {
            bool andExprTruthValue = true;

            for (;;) {
                bool truthValue = true;

                CHECK_RANGE;
                int opcode = rules[i++];

                int leftOperand = n;
                if (opcode & Q_MOD_10) {
                    leftOperand %= 10;
                } else if (opcode & Q_MOD_100) {
                    leftOperand %= 100;
                } else if (opcode & Q_LEAD_1000) {
                    while (leftOperand >= 1000)
                        leftOperand /= 1000;
                }

                int op = opcode & Q_OP_MASK;

                CHECK_RANGE;
                int rightOperand = rules[i++];

                switch (op) {
                default:
                    return -1;
                case Q_EQ:
                    truthValue = (leftOperand == rightOperand);
                    break;
                case Q_LT:
                    truthValue = (leftOperand < rightOperand);
                    break;
                case Q_LEQ:
                    truthValue = (leftOperand <= rightOperand);
                    break;
        case Q_BETWEEN:
                    int bottom = rightOperand;
                    CHECK_RANGE;
                    int top = rules[i++];
                    truthValue = (leftOperand >= bottom && leftOperand <= top);
                }

                if (opcode & Q_NOT)
                    truthValue = !truthValue;

                andExprTruthValue = andExprTruthValue && truthValue;

                if (i == rulesSize || rules[i] != Q_AND)
                    break;
                ++i;
            }

            orExprTruthValue = orExprTruthValue || andExprTruthValue;

            if (i == rulesSize || rules[i] != Q_OR)
                break;
            ++i;
        }

        if (orExprTruthValue)
            return result;

        ++result;

        if (i == rulesSize)
            return result;

        if (rules[i++] != Q_NEWRULE)
            break;
    }
    return -1;
}

read16()

static quint16 read16 ( const uchar *  data )

static

Definition at line 752 of file qtranslator.cpp.

Referenced by QTranslatorPrivate::do_translate().

{
    return (data[0] << 8) | (data[1]);
}

read32()

static quint32 read32 ( const uchar *  data )

static

Definition at line 757 of file qtranslator.cpp.

Referenced by QTranslatorPrivate::do_load(), QTranslatorPrivate::do_translate(), and getMessage().

{
    return (data[0] << 24)
        | (data[1] << 16)
        | (data[2] << 8)
        | (data[3]);
}

read8()

static quint8 read8 ( const uchar *  data )

static

Definition at line 747 of file qtranslator.cpp.

Referenced by QTranslatorPrivate::do_load(), QTranslatorPrivate::do_translate(), and getMessage().

{
    return *data;
}

Variable Documentation

magic

const uchar magic[MagicLength]

static

Initial value:

= {
    0x3c, 0xb8, 0x64, 0x18, 0xca, 0xef, 0x9c, 0x95,
    0xcd, 0x21, 0x1c, 0xbf, 0x60, 0xa1, 0xbd, 0xdd
}

Definition at line 96 of file qtranslator.cpp.

Referenced by QTranslatorPrivate::do_load().

MagicLength

const int MagicLength = 16

static

Definition at line 95 of file qtranslator.cpp.

Referenced by QTranslatorPrivate::do_load().