/**************************************************************************** ** $Id$ ** ** Localization database support. ** ** Created : 980906 ** ** Copyright (C) 1998-2003 Trolltech AS. All rights reserved. ** ** This file is part of the kernel module of the Qt GUI Toolkit. ** ** This file may be distributed under the terms of the Q Public License ** as defined by Trolltech AS of Norway and appearing in the file ** LICENSE.QPL included in the packaging of this file. ** ** This file may be distributed and/or modified under the terms of the ** GNU General Public License version 2 as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL included in the ** packaging of this file. ** ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition ** licenses may use this file in accordance with the Qt Commercial License ** Agreement provided with the Software. ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for ** information about Qt Commercial License Agreements. ** See http://www.trolltech.com/qpl/ for QPL licensing information. ** See http://www.trolltech.com/gpl/ for GPL licensing information. ** ** Contact info@trolltech.com if any conditions of this licensing are ** not clear to you. ** **********************************************************************/ #include "qplatformdefs.h" // POSIX Large File Support redefines open -> open64 static inline int qt_open(const char *pathname, int flags, mode_t mode) { return ::open(pathname, flags, mode); } #if defined(open) # undef open #endif // POSIX Large File Support redefines truncate -> truncate64 #if defined(truncate) # undef truncate #endif #include "qtranslator.h" #ifndef QT_NO_TRANSLATION #include "qfileinfo.h" #include "qwidgetlist.h" #include "qintdict.h" #include "qstring.h" #include "qapplication.h" #include "qfile.h" #include "qbuffer.h" #include "qdatastream.h" #include "qmap.h" #include "qtl.h" #if defined(Q_OS_UNIX) #define QT_USE_MMAP #endif // most of the headers below are already included in qplatformdefs.h // also this lacks Large File support but that's probably irrelevant #if defined(QT_USE_MMAP) // for mmap #include #include #include #include #include // for htonl #include #endif #include /* $ mcookie 3cb86418caef9c95cd211cbf60a1bddd $ */ // magic number for the file static const int MagicLength = 16; static const uchar magic[MagicLength] = { 0x3c, 0xb8, 0x64, 0x18, 0xca, 0xef, 0x9c, 0x95, 0xcd, 0x21, 0x1c, 0xbf, 0x60, 0xa1, 0xbd, 0xdd }; static bool match( const char* found, const char* target ) { // 0 means anything, "" means empty return found == 0 || qstrcmp( found, target ) == 0; } #if defined(Q_C_CALLBACKS) extern "C" { #endif /* Yes, unfortunately, we have code here that depends on endianness. The candidate is big endian (it comes from a .qm file) whereas the target endianness depends on the system Qt is running on. */ #ifdef Q_OS_TEMP static int __cdecl cmp_uint32_little( const void* target, const void* candidate ) #else static int cmp_uint32_little( const void* target, const void* candidate ) #endif { const uchar* t = (const uchar*) target; const uchar* c = (const uchar*) candidate; return t[3] != c[0] ? (int) t[3] - (int) c[0] : t[2] != c[1] ? (int) t[2] - (int) c[1] : t[1] != c[2] ? (int) t[1] - (int) c[2] : (int) t[0] - (int) c[3]; } #ifdef Q_OS_TEMP static int __cdecl cmp_uint32_big( const void* target, const void* candidate ) #else static int cmp_uint32_big( const void* target, const void* candidate ) #endif { const uchar* t = (const uchar*) target; const uchar* c = (const uchar*) candidate; return t[0] != c[0] ? (int) t[0] - (int) c[0] : t[1] != c[1] ? (int) t[1] - (int) c[1] : t[2] != c[2] ? (int) t[2] - (int) c[2] : (int) t[3] - (int) c[3]; } #if defined(Q_C_CALLBACKS) } #endif static int systemWordSize = 0; static bool systemBigEndian; static uint elfHash( const char * name ) { 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; } extern bool qt_detectRTLLanguage(); class QTranslatorPrivate { public: struct Offset { Offset() : h( 0 ), o( 0 ) { } Offset( const QTranslatorMessage& m, int offset ) : h( m.hash() ), o( offset ) { } bool operator<( const Offset&k ) const { return ( h != k.h ) ? h < k.h : o < k.o; } Q_DUMMY_COMPARISON_OPERATOR(QTranslatorPrivate::Offset) uint h; uint o; }; enum { Contexts = 0x2f, Hashes = 0x42, Messages = 0x69 }; QTranslatorPrivate() : unmapPointer( 0 ), unmapLength( 0 ), messageArray( 0 ), offsetArray( 0 ), contextArray( 0 ) #ifndef QT_NO_TRANSLATION_BUILDER , messages( 0 ) #endif { } // QTranslator must finalize this before deallocating it // for mmap'ed files, this is what needs to be unmapped. char * unmapPointer; unsigned int unmapLength; // for squeezed but non-file data, this is what needs to be deleted QByteArray * messageArray; QByteArray * offsetArray; QByteArray * contextArray; #ifndef QT_NO_TRANSLATION_BUILDER QMap * messages; #endif }; /*! \class QTranslator \brief The QTranslator class provides internationalization support for text output. \ingroup i18n \ingroup environment \mainclass An object of this class contains a set of QTranslatorMessage objects, each of which specifies a translation from a source language to a target language. QTranslator provides functions to look up translations, add new ones, remove them, load and save them, etc. The most common use of QTranslator is to: load a translator file created with \link linguist-manual.book Qt Linguist\endlink, install it using QApplication::installTranslator(), and use it via QObject::tr(). For example: \code int main( int argc, char ** argv ) { QApplication app( argc, argv ); QTranslator translator( 0 ); translator.load( "french.qm", "." ); app.installTranslator( &translator ); MyWidget m; app.setMainWidget( &m ); m.show(); return app.exec(); } \endcode Note that the translator must be created \e before the application's main window. Most applications will never need to do anything else with this class. The other functions provided by this class are useful for applications that work on translator files. We call a translation a "messsage". For this reason, translation files are sometimes referred to as "message files". It is possible to lookup a translation using findMessage() (as tr() and QApplication::translate() do) and contains(), to insert a new translation messsage using insert(), and to remove one using remove(). Translation tools often need more information than the bare source text and translation, for example, context information to help the translator. But end-user programs that are using translations usually only need lookup. To cater for these different needs, QTranslator can use stripped translator files that use the minimum of memory and which support little more functionality than findMessage(). Thus, load() may not load enough information to make anything more than findMessage() work. save() has an argument indicating whether to save just this minimum of information or to save everything. "Everything" means that for each translation item the following information is kept: \list \i The \e {translated text} - the return value from tr(). \i The input key: \list \i The \e {source text} - usually the argument to tr(). \i The \e context - usually the class name for the tr() caller. \i The \e comment - a comment that helps disambiguate different uses of the same text in the same context. \endlist \endlist The minimum for each item is just the information necessary for findMessage() to return the right text. This may include the source, context and comment, but usually it is just a hash value and the translated text. For example, the "Cancel" in a dialog might have "Anuluj" when the program runs in Polish (in this case the source text would be "Cancel"). The context would (normally) be the dialog's class name; there would normally be no comment, and the translated text would be "Anuluj". But it's not always so simple. The Spanish version of a printer dialog with settings for two-sided printing and binding would probably require both "Activado" and "Activada" as translations for "Enabled". In this case the source text would be "Enabled" in both cases, and the context would be the dialog's class name, but the two items would have disambiguating comments such as "two-sided printing" for one and "binding" for the other. The comment enables the translator to choose the appropriate gender for the Spanish version, and enables Qt to distinguish between translations. Note that when QTranslator loads a stripped file, most functions do not work. The functions that do work with stripped files are explicitly documented as such. \sa QTranslatorMessage QApplication::installTranslator() QApplication::removeTranslator() QObject::tr() QApplication::translate() */ /*! \enum QTranslator::SaveMode This enum type defines how QTranslator writes translation files. There are two modes: \value Everything files are saved with all available information \value Stripped files are saved with just enough information for end-user applications Note that when QTranslator loads a stripped file, most functions do not work. The functions that do work with stripped files are explicitly documented as such. */ /*! Constructs an empty message file object that is not connected to any file. The object is called \a name with parent \a parent. */ QTranslator::QTranslator( QObject * parent, const char * name ) : QObject( parent, name ) { d = new QTranslatorPrivate; } /*! Destroys the object and frees any allocated resources. */ QTranslator::~QTranslator() { if ( qApp ) qApp->removeTranslator( this ); clear(); delete d; } extern bool qt_detectRTLLanguage(); /*! Loads \a filename, which may be an absolute file name or relative to \a directory. The previous contents of this translator object is discarded. If the full file name does not exist, other file names are tried in the following order: \list 1 \i File name with \a suffix appended (".qm" if the \a suffix is QString::null). \i File name with text after a character in \a search_delimiters stripped ("_." is the default for \a search_delimiters if it is QString::null). \i File name stripped and \a suffix appended. \i File name stripped further, etc. \endlist For example, an application running in the fr_CA locale (French-speaking Canada) might call load("foo.fr_ca", "/opt/foolib"). load() would then try to open the first existing readable file from this list: \list 1 \i /opt/foolib/foo.fr_ca \i /opt/foolib/foo.fr_ca.qm \i /opt/foolib/foo.fr \i /opt/foolib/foo.fr.qm \i /opt/foolib/foo \i /opt/foolib/foo.qm \endlist \sa save() */ bool QTranslator::load( const QString & filename, const QString & directory, const QString & search_delimiters, const QString & suffix ) { clear(); QString prefix; if ( filename[0] == '/' #ifdef Q_WS_WIN || (filename[0] && filename[1] == ':') || filename[0] == '\\' #endif ) prefix = QString::fromLatin1( "" ); else prefix = directory; if ( prefix.length() ) { if ( prefix[int(prefix.length()-1)] != '/' ) prefix += QChar( '/' ); } QString fname = filename; QString realname; QString delims; delims = search_delimiters.isNull() ? QString::fromLatin1( "_." ) : search_delimiters; for ( ;; ) { QFileInfo fi; realname = prefix + fname; fi.setFile( realname ); if ( fi.isReadable() ) break; realname += suffix.isNull() ? QString::fromLatin1( ".qm" ) : suffix; fi.setFile( realname ); if ( fi.isReadable() ) break; int rightmost = 0; for ( int i = 0; i < (int)delims.length(); i++ ) { int k = fname.findRev( delims[i] ); if ( k > rightmost ) rightmost = k; } // no truncations? fail if ( rightmost == 0 ) return FALSE; fname.truncate( rightmost ); } // realname is now the fully qualified name of a readable file. #if defined(QT_USE_MMAP) #ifndef MAP_FILE #define MAP_FILE 0 #endif #ifndef MAP_FAILED #define MAP_FAILED -1 #endif int f; f = qt_open( QFile::encodeName(realname), O_RDONLY, 0666 ); if ( f < 0 ) { // qDebug( "can't open %s: %s", realname.ascii(), strerror( errno ) ); return FALSE; } struct stat st; if ( fstat( f, &st ) ) { // qDebug( "can't stat %s: %s", realname.ascii(), strerror( errno ) ); return FALSE; } char * tmp; tmp = (char*)mmap( 0, st.st_size, // any address, whole file PROT_READ, // read-only memory MAP_FILE | MAP_PRIVATE, // swap-backed map from file f, 0 ); // from offset 0 of f if ( !tmp || tmp == (char*)MAP_FAILED ) { // qDebug( "can't mmap %s: %s", filename.ascii(), strerror( errno ) ); return FALSE; } ::close( f ); d->unmapPointer = tmp; d->unmapLength = st.st_size; #else QFile f( realname ); if ( !f.exists() ) return FALSE; d->unmapLength = f.size(); d->unmapPointer = new char[d->unmapLength]; bool ok = FALSE; if ( f.open(IO_ReadOnly) ) { ok = d->unmapLength == (uint)f.readBlock( d->unmapPointer, d->unmapLength ); f.close(); } if ( !ok ) { delete [] d->unmapPointer; d->unmapPointer = 0; return FALSE; } #endif return do_load( (const uchar *) d->unmapPointer, d->unmapLength ); } /*! \overload \fn bool QTranslator::load( const uchar *data, int len ) Loads the .qm file data \a data of length \a len into the translator. The data is not copied. The caller must be able to guarantee that \a data will not be deleted or modified. */ bool QTranslator::do_load( const uchar *data, int len ) { if ( len < MagicLength || memcmp( data, magic, MagicLength ) != 0 ) { clear(); return FALSE; } QByteArray array; array.setRawData( (const char *) data, len ); QDataStream s( array, IO_ReadOnly ); bool ok = TRUE; s.device()->at( MagicLength ); Q_UINT8 tag = 0; Q_UINT32 blockLen = 0; s >> tag >> blockLen; while ( tag && blockLen ) { if ( (Q_UINT32) s.device()->at() + blockLen > (Q_UINT32) len ) { ok = FALSE; break; } if ( tag == QTranslatorPrivate::Contexts && !d->contextArray ) { d->contextArray = new QByteArray; d->contextArray->setRawData( array.data() + s.device()->at(), blockLen ); } else if ( tag == QTranslatorPrivate::Hashes && !d->offsetArray ) { d->offsetArray = new QByteArray; d->offsetArray->setRawData( array.data() + s.device()->at(), blockLen ); } else if ( tag == QTranslatorPrivate::Messages && !d->messageArray ) { d->messageArray = new QByteArray; d->messageArray->setRawData( array.data() + s.device()->at(), blockLen ); } if ( !s.device()->at(s.device()->at() + blockLen) ) { ok = FALSE; break; } tag = 0; blockLen = 0; if ( !s.atEnd() ) s >> tag >> blockLen; } array.resetRawData( (const char *) data, len ); if ( qApp && qApp->translators && qApp->translators->contains(this) ) qApp->setReverseLayout( qt_detectRTLLanguage() ); return ok; } #ifndef QT_NO_TRANSLATION_BUILDER /*! Saves this message file to \a filename, overwriting the previous contents of \a filename. If \a mode is \c Everything (the default), all the information is preserved. If \a mode is \c Stripped, any information that is not necessary for findMessage() is stripped away. \sa load() */ bool QTranslator::save( const QString & filename, SaveMode mode ) { QFile f( filename ); if ( f.open( IO_WriteOnly ) ) { squeeze( mode ); QDataStream s( &f ); s.writeRawBytes( (const char *)magic, MagicLength ); Q_UINT8 tag; if ( d->offsetArray != 0 ) { tag = (Q_UINT8) QTranslatorPrivate::Hashes; Q_UINT32 oas = (Q_UINT32) d->offsetArray->size(); s << tag << oas; s.writeRawBytes( d->offsetArray->data(), oas ); } if ( d->messageArray != 0 ) { tag = (Q_UINT8) QTranslatorPrivate::Messages; Q_UINT32 mas = (Q_UINT32) d->messageArray->size(); s << tag << mas; s.writeRawBytes( d->messageArray->data(), mas ); } if ( d->contextArray != 0 ) { tag = (Q_UINT8) QTranslatorPrivate::Contexts; Q_UINT32 cas = (Q_UINT32) d->contextArray->size(); s << tag << cas; s.writeRawBytes( d->contextArray->data(), cas ); } return TRUE; } return FALSE; } #endif /*! Empties this translator of all contents. This function works with stripped translator files. */ void QTranslator::clear() { if ( d->unmapPointer && d->unmapLength ) { #if defined(QT_USE_MMAP) munmap( d->unmapPointer, d->unmapLength ); #else delete [] d->unmapPointer; #endif d->unmapPointer = 0; d->unmapLength = 0; } if ( d->messageArray ) { d->messageArray->resetRawData( d->messageArray->data(), d->messageArray->size() ); delete d->messageArray; d->messageArray = 0; } if ( d->offsetArray ) { d->offsetArray->resetRawData( d->offsetArray->data(), d->offsetArray->size() ); delete d->offsetArray; d->offsetArray = 0; } if ( d->contextArray ) { d->contextArray->resetRawData( d->contextArray->data(), d->contextArray->size() ); delete d->contextArray; d->contextArray = 0; } #ifndef QT_NO_TRANSLATION_BUILDER delete d->messages; d->messages = 0; #endif if ( qApp ) { qApp->setReverseLayout( qt_detectRTLLanguage() ); QWidgetList *list = QApplication::topLevelWidgets(); QWidgetListIt it( *list ); QWidget *w; while ( ( w=it.current() ) != 0 ) { ++it; if (!w->isDesktop()) qApp->postEvent( w, new QEvent( QEvent::LanguageChange ) ); } delete list; } } #ifndef QT_NO_TRANSLATION_BUILDER /*! Converts this message file to the compact format used to store message files on disk. You should never need to call this directly; save() and other functions call it as necessary. \a mode is for internal use. \sa save() unsqueeze() */ void QTranslator::squeeze( SaveMode mode ) { if ( !d->messages ) { if ( mode == Stripped ) unsqueeze(); else return; } QMap * messages = d->messages; d->messages = 0; clear(); d->messageArray = new QByteArray; d->offsetArray = new QByteArray; QMap offsets; QDataStream ms( *d->messageArray, IO_WriteOnly ); QMap::Iterator it = messages->begin(), next; int cpPrev = 0, cpNext = 0; for ( it = messages->begin(); it != messages->end(); ++it ) { cpPrev = cpNext; next = it; ++next; if ( next == messages->end() ) cpNext = 0; else cpNext = (int) it.key().commonPrefix( next.key() ); offsets.replace( QTranslatorPrivate::Offset(it.key(), ms.device()->at()), (void*)0 ); it.key().write( ms, mode == Stripped, (QTranslatorMessage::Prefix) QMAX(cpPrev, cpNext + 1) ); } d->offsetArray->resize( 0 ); QMap::Iterator offset; offset = offsets.begin(); QDataStream ds( *d->offsetArray, IO_WriteOnly ); while ( offset != offsets.end() ) { QTranslatorPrivate::Offset k = offset.key(); ++offset; ds << (Q_UINT32)k.h << (Q_UINT32)k.o; } if ( mode == Stripped ) { QAsciiDict contextSet( 1511 ); int baudelaire; for ( it = messages->begin(); it != messages->end(); ++it ) contextSet.replace( it.key().context(), &baudelaire ); Q_UINT16 hTableSize; if ( contextSet.count() < 200 ) hTableSize = ( contextSet.count() < 60 ) ? 151 : 503; else if ( contextSet.count() < 2500 ) hTableSize = ( contextSet.count() < 750 ) ? 1511 : 5003; else hTableSize = 15013; QIntDict hDict( hTableSize ); QAsciiDictIterator c = contextSet; while ( c.current() != 0 ) { hDict.insert( (long) (elfHash(c.currentKey()) % hTableSize), c.currentKey() ); ++c; } /* The contexts found in this translator are stored in a hash table to provide fast lookup. The context array has the following format: Q_UINT16 hTableSize; Q_UINT16 hTable[hTableSize]; Q_UINT8 contextPool[...]; The context pool stores the contexts as Pascal strings: Q_UINT8 len; Q_UINT8 data[len]; Let's consider the look-up of context "FunnyDialog". A hash value between 0 and hTableSize - 1 is computed, say h. If hTable[h] is 0, "FunnyDialog" is not covered by this translator. Else, we check in the contextPool at offset 2 * hTable[h] to see if "FunnyDialog" is one of the contexts stored there, until we find it or we meet the empty string. */ d->contextArray = new QByteArray; d->contextArray->resize( 2 + (hTableSize << 1) ); QDataStream t( *d->contextArray, IO_WriteOnly ); Q_UINT16 *hTable = new Q_UINT16[hTableSize]; memset( hTable, 0, hTableSize * sizeof(Q_UINT16) ); t << hTableSize; t.device()->at( 2 + (hTableSize << 1) ); t << (Q_UINT16) 0; // the entry at offset 0 cannot be used uint upto = 2; for ( int i = 0; i < hTableSize; i++ ) { const char *con = hDict.find( i ); if ( con == 0 ) { hTable[i] = 0; } else { hTable[i] = (Q_UINT16) ( upto >> 1 ); do { uint len = (uint) qstrlen( con ); len = QMIN( len, 255 ); t << (Q_UINT8) len; t.writeRawBytes( con, len ); upto += 1 + len; hDict.remove( i ); } while ( (con = hDict.find(i)) != 0 ); do { t << (Q_UINT8) 0; // empty string (at least one) upto++; } while ( (upto & 0x1) != 0 ); // offsets have to be even } } t.device()->at( 2 ); for ( int j = 0; j < hTableSize; j++ ) t << hTable[j]; delete [] hTable; if ( upto > 131072 ) { qWarning( "QTranslator::squeeze: Too many contexts" ); delete d->contextArray; d->contextArray = 0; } } delete messages; } /*! Converts this message file into an easily modifiable data structure, less compact than the format used in the files. You should never need to call this function; it is called by insert() and friends as necessary. \sa squeeze() */ void QTranslator::unsqueeze() { if ( d->messages ) return; d->messages = new QMap; if ( !d->messageArray ) return; QDataStream s( *d->messageArray, IO_ReadOnly ); for ( ;; ) { QTranslatorMessage m( s ); if ( m.hash() == 0 ) break; d->messages->insert( m, (void *) 0 ); } } /*! Returns TRUE if this message file contains a message with the key (\a context, \a sourceText, \a comment); otherwise returns FALSE. This function works with stripped translator files. (This is is a one-liner that calls findMessage().) */ bool QTranslator::contains( const char* context, const char* sourceText, const char* comment ) const { return !findMessage( context, sourceText, comment ).translation().isNull(); } /*! Inserts \a message into this message file. This function does \e not work with stripped translator files. It may appear to, but that is not dependable. \sa remove() */ void QTranslator::insert( const QTranslatorMessage& message ) { unsqueeze(); d->messages->remove( message ); // safer d->messages->insert( message, (void *) 0 ); } /*! \fn void QTranslator::insert( const char *, const char *, const QString & ) \overload \obsolete */ /*! Removes \a message from this translator. This function works with stripped translator files. \sa insert() */ void QTranslator::remove( const QTranslatorMessage& message ) { unsqueeze(); d->messages->remove( message ); } /*! \fn void QTranslator::remove( const char *, const char * ) \overload \obsolete Removes the translation associated to the key (\a context, \a sourceText, "") from this translator. */ #endif /*! \fn QString QTranslator::find( const char*, const char*, const char* ) const \obsolete Please use findMessage() instead. Returns the translation for the key (\a context, \a sourceText, \a comment) or QString::null if there is none in this translator. */ /*! Returns the QTranslatorMessage for the key (\a context, \a sourceText, \a comment). If none is found, also tries (\a context, \a sourceText, ""). */ QTranslatorMessage QTranslator::findMessage( const char* context, const char* sourceText, const char* comment ) const { if ( context == 0 ) context = ""; if ( sourceText == 0 ) sourceText = ""; if ( comment == 0 ) comment = ""; #ifndef QT_NO_TRANSLATION_BUILDER if ( d->messages ) { QMap::ConstIterator it; it = d->messages->find( QTranslatorMessage(context, sourceText, comment) ); if ( it != d->messages->end() ) return it.key(); if ( comment[0] ) { it = d->messages->find( QTranslatorMessage(context, sourceText, "") ); if ( it != d->messages->end() ) return it.key(); } return QTranslatorMessage(); } #endif if ( !d->offsetArray ) return QTranslatorMessage(); /* Check if the context belongs to this QTranslator. If many translators are installed, this step is necessary. */ if ( d->contextArray ) { Q_UINT16 hTableSize = 0; QDataStream t( *d->contextArray, IO_ReadOnly ); t >> hTableSize; uint g = elfHash( context ) % hTableSize; t.device()->at( 2 + (g << 1) ); Q_UINT16 off; t >> off; if ( off == 0 ) return QTranslatorMessage(); t.device()->at( 2 + (hTableSize << 1) + (off << 1) ); Q_UINT8 len; char con[256]; for ( ;; ) { t >> len; if ( len == 0 ) return QTranslatorMessage(); t.readRawBytes( con, len ); con[len] = '\0'; if ( qstrcmp(con, context) == 0 ) break; } } size_t numItems = d->offsetArray->size() / ( 2 * sizeof(Q_UINT32) ); if ( !numItems ) return QTranslatorMessage(); if ( systemWordSize == 0 ) qSysInfo( &systemWordSize, &systemBigEndian ); for ( ;; ) { Q_UINT32 h = elfHash( QCString(sourceText) + comment ); char *r = (char *) bsearch( &h, d->offsetArray->data(), numItems, 2 * sizeof(Q_UINT32), systemBigEndian ? cmp_uint32_big : cmp_uint32_little ); if ( r != 0 ) { // go back on equal key while ( r != d->offsetArray->data() && cmp_uint32_big(r - 8, r) == 0 ) r -= 8; QDataStream s( *d->offsetArray, IO_ReadOnly ); s.device()->at( r - d->offsetArray->data() ); Q_UINT32 rh, ro; s >> rh >> ro; QDataStream ms( *d->messageArray, IO_ReadOnly ); while ( rh == h ) { ms.device()->at( ro ); QTranslatorMessage m( ms ); if ( match(m.context(), context) && match(m.sourceText(), sourceText) && match(m.comment(), comment) ) return m; if ( s.atEnd() ) break; s >> rh >> ro; } } if ( !comment[0] ) break; comment = ""; } return QTranslatorMessage(); } /*! Returns TRUE if this translator is empty, otherwise returns FALSE. This function works with stripped and unstripped translation files. */ bool QTranslator::isEmpty() const { return !( d->unmapPointer || d->unmapLength || d->messageArray || d->offsetArray || d->contextArray || (d->messages && d->messages->count()) ); } #ifndef QT_NO_TRANSLATION_BUILDER /*! Returns a list of the messages in the translator. This function is rather slow. Because it is seldom called, it's optimized for simplicity and small size, rather than speed. If you want to iterate over the list, you should iterate over a copy, e.g. \code QValueList list = myTranslator.messages(); QValueList::Iterator it = list.begin(); while ( it != list.end() ) { process_message( *it ); ++it; } \endcode */ QValueList QTranslator::messages() const { ((QTranslator *) this)->unsqueeze(); return d->messages->keys(); } #endif /*! \class QTranslatorMessage \brief The QTranslatorMessage class contains a translator message and its properties. \ingroup i18n \ingroup environment This class is of no interest to most applications. It is useful for translation tools such as \link linguist-manual.book Qt Linguist\endlink. It is provided simply to make the API complete and regular. For a QTranslator object, a lookup key is a triple (\e context, \e {source text}, \e comment) that uniquely identifies a message. An extended key is a quadruple (\e hash, \e context, \e {source text}, \e comment), where \e hash is computed from the source text and the comment. Unless you plan to read and write messages yourself, you need not worry about the hash value. QTranslatorMessage stores this triple or quadruple and the relevant translation if there is any. \sa QTranslator */ /*! Constructs a translator message with the extended key (0, 0, 0, 0) and QString::null as translation. */ QTranslatorMessage::QTranslatorMessage() : h( 0 ), cx( 0 ), st( 0 ), cm( 0 ) { } /*! Constructs an translator message with the extended key (\e h, \a context, \a sourceText, \a comment), where \e h is computed from \a sourceText and \a comment, and possibly with a \a translation. */ QTranslatorMessage::QTranslatorMessage( const char * context, const char * sourceText, const char * comment, const QString& translation ) : cx( context ), st( sourceText ), cm( comment ), tn( translation ) { // 0 means we don't know, "" means empty if ( cx == (const char*)0 ) cx = ""; if ( st == (const char*)0 ) st = ""; if ( cm == (const char*)0 ) cm = ""; h = elfHash( st + cm ); } /*! Constructs a translator message read from the \a stream. The resulting message may have any combination of content. \sa QTranslator::save() */ QTranslatorMessage::QTranslatorMessage( QDataStream & stream ) : cx( 0 ), st( 0 ), cm( 0 ) { QString str16; char tag; Q_UINT8 obs1; for ( ;; ) { tag = 0; if ( !stream.atEnd() ) stream.readRawBytes( &tag, 1 ); switch( (Tag)tag ) { case Tag_End: if ( h == 0 ) h = elfHash( st + cm ); return; case Tag_SourceText16: // obsolete stream >> str16; st = str16.latin1(); break; case Tag_Translation: stream >> tn; break; case Tag_Context16: // obsolete stream >> str16; cx = str16.latin1(); break; case Tag_Hash: stream >> h; break; case Tag_SourceText: stream >> st; break; case Tag_Context: stream >> cx; if ( cx == "" ) // for compatibility cx = 0; break; case Tag_Comment: stream >> cm; break; case Tag_Obsolete1: // obsolete stream >> obs1; break; default: h = 0; st = 0; cx = 0; cm = 0; tn = QString::null; return; } } } /*! Constructs a copy of translator message \a m. */ QTranslatorMessage::QTranslatorMessage( const QTranslatorMessage & m ) : cx( m.cx ), st( m.st ), cm( m.cm ), tn( m.tn ) { h = m.h; } /*! Assigns message \a m to this translator message and returns a reference to this translator message. */ QTranslatorMessage & QTranslatorMessage::operator=( const QTranslatorMessage & m ) { h = m.h; cx = m.cx; st = m.st; cm = m.cm; tn = m.tn; return *this; } /*! \fn uint QTranslatorMessage::hash() const Returns the hash value used internally to represent the lookup key. This value is zero only if this translator message was constructed from a stream containing invalid data. The hashing function is unspecified, but it will remain unchanged in future versions of Qt. */ /*! \fn const char *QTranslatorMessage::context() const Returns the context for this message (e.g. "MyDialog"). */ /*! \fn const char *QTranslatorMessage::sourceText() const Returns the source text of this message (e.g. "&Save"). */ /*! \fn const char *QTranslatorMessage::comment() const Returns the comment for this message (e.g. "File|Save"). */ /*! \fn void QTranslatorMessage::setTranslation( const QString & translation ) Sets the translation of the source text to \a translation. \sa translation() */ /*! \fn QString QTranslatorMessage::translation() const Returns the translation of the source text (e.g., "&Sauvegarder"). \sa setTranslation() */ /*! \enum QTranslatorMessage::Prefix Let (\e h, \e c, \e s, \e m) be the extended key. The possible prefixes are \value NoPrefix no prefix \value Hash only (\e h) \value HashContext only (\e h, \e c) \value HashContextSourceText only (\e h, \e c, \e s) \value HashContextSourceTextComment the whole extended key, (\e h, \e c, \e s, \e m) \sa write() commonPrefix() */ /*! Writes this translator message to the \a stream. If \a strip is FALSE (the default), all the information in the message is written. If \a strip is TRUE, only the part of the extended key specified by \a prefix is written with the translation (\c HashContextSourceTextComment by default). \sa commonPrefix() */ void QTranslatorMessage::write( QDataStream & stream, bool strip, Prefix prefix ) const { char tag; tag = (char)Tag_Translation; stream.writeRawBytes( &tag, 1 ); stream << tn; bool mustWriteHash = TRUE; if ( !strip ) prefix = HashContextSourceTextComment; switch ( prefix ) { case HashContextSourceTextComment: tag = (char)Tag_Comment; stream.writeRawBytes( &tag, 1 ); stream << cm; // fall through case HashContextSourceText: tag = (char)Tag_SourceText; stream.writeRawBytes( &tag, 1 ); stream << st; // fall through case HashContext: tag = (char)Tag_Context; stream.writeRawBytes( &tag, 1 ); stream << cx; // fall through default: if ( mustWriteHash ) { tag = (char)Tag_Hash; stream.writeRawBytes( &tag, 1 ); stream << h; } } tag = (char)Tag_End; stream.writeRawBytes( &tag, 1 ); } /*! Returns the widest lookup prefix that is common to this translator message and to message \a m. For example, if the extended key is for this message is (71, "PrintDialog", "Yes", "Print?") and that for \a m is (71, "PrintDialog", "No", "Print?"), this function returns \c HashContext. \sa write() */ QTranslatorMessage::Prefix QTranslatorMessage::commonPrefix( const QTranslatorMessage& m ) const { if ( h != m.h ) return NoPrefix; if ( cx != m.cx ) return Hash; if ( st != m.st ) return HashContext; if ( cm != m.cm ) return HashContextSourceText; return HashContextSourceTextComment; } /*! Returns TRUE if the extended key of this object is equal to that of \a m; otherwise returns FALSE. */ bool QTranslatorMessage::operator==( const QTranslatorMessage& m ) const { return h == m.h && cx == m.cx && st == m.st && cm == m.cm; } /*! \fn bool QTranslatorMessage::operator!=( const QTranslatorMessage& m ) const Returns TRUE if the extended key of this object is different from that of \a m; otherwise returns FALSE. */ /*! Returns TRUE if the extended key of this object is lexicographically before than that of \a m; otherwise returns FALSE. */ bool QTranslatorMessage::operator<( const QTranslatorMessage& m ) const { return h != m.h ? h < m.h : ( cx != m.cx ? cx < m.cx : (st != m.st ? st < m.st : cm < m.cm) ); } /*! \fn bool QTranslatorMessage::operator<=( const QTranslatorMessage& m ) const Returns TRUE if the extended key of this object is lexicographically before that of \a m or if they are equal; otherwise returns FALSE. */ /*! \fn bool QTranslatorMessage::operator>( const QTranslatorMessage& m ) const Returns TRUE if the extended key of this object is lexicographically after that of \a m; otherwise returns FALSE. */ /*! \fn bool QTranslatorMessage::operator>=( const QTranslatorMessage& m ) const Returns TRUE if the extended key of this object is lexicographically after that of \a m or if they are equal; otherwise returns FALSE. */ #endif // QT_NO_TRANSLATION