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aard.cc
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aard.cc
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/* This file is (c) 2008-2012 Konstantin Isakov <[email protected]>
* Part of GoldenDict. Licensed under GPLv3 or later, see the LICENSE file */
#include "aard.hh"
#include "btreeidx.hh"
#include "folding.hh"
#include "utf8.hh"
#include "chunkedstorage.hh"
#include "langcoder.hh"
#include "fsencoding.hh"
#include "decompress.hh"
#include "gddebug.hh"
#include "ftshelpers.hh"
#include "htmlescape.hh"
#include <map>
#include <set>
#include <string>
#ifdef _MSC_VER
#include <stub_msvc.h>
#endif
#include <QString>
#include <QSemaphore>
#include <QThreadPool>
#include <QAtomicInt>
#include <QDomDocument>
#include <QtEndian>
#include <QRegularExpression>
#include "ufile.hh"
#include "wstring_qt.hh"
#include "utils.hh"
namespace Aard {
using std::map;
using std::multimap;
using std::pair;
using std::set;
using std::string;
using gd::wstring;
using BtreeIndexing::WordArticleLink;
using BtreeIndexing::IndexedWords;
using BtreeIndexing::IndexInfo;
namespace {
DEF_EX_STR( exNotAardFile, "Not an AARD file", Dictionary::Ex )
DEF_EX_STR( exCantReadFile, "Can't read file", Dictionary::Ex )
DEF_EX_STR( exWordIsTooLarge, "Enountered a word that is too large:", Dictionary::Ex )
DEF_EX_STR( exSuddenEndOfFile, "Sudden end of file", Dictionary::Ex )
#pragma pack( push, 1 )
/// AAR file header
struct AAR_header
{
char signature[4];
char checksum[40];
quint16 version;
char uuid[16];
quint16 volume;
quint16 totalVolumes;
quint32 metaLength;
quint32 wordsCount;
quint32 articleOffset;
char indexItemFormat[4];
char keyLengthFormat[2];
char articleLengthFormat[2];
}
#ifndef _MSC_VER
__attribute__((packed))
#endif
;
struct IndexElement
{
quint32 wordOffset;
quint32 articleOffset;
}
#ifndef _MSC_VER
__attribute__((packed))
#endif
;
struct IndexElement64
{
quint32 wordOffset;
quint64 articleOffset;
}
#ifndef _MSC_VER
__attribute__((packed))
#endif
;
enum
{
Signature = 0x58524141, // AARX on little-endian, XRAA on big-endian
CurrentFormatVersion = 4 + BtreeIndexing::FormatVersion + Folding::Version
};
struct IdxHeader
{
quint32 signature; // First comes the signature, AARX
quint32 formatVersion; // File format version (CurrentFormatVersion)
quint32 chunksOffset; // The offset to chunks' storage
quint32 indexBtreeMaxElements; // Two fields from IndexInfo
quint32 indexRootOffset;
quint32 wordCount;
quint32 articleCount;
quint32 langFrom; // Source language
quint32 langTo; // Target language
}
#ifndef _MSC_VER
__attribute__((packed))
#endif
;
#pragma pack( pop )
bool indexIsOldOrBad( string const & indexFile )
{
File::Class idx( indexFile, "rb" );
IdxHeader header;
return idx.readRecords( &header, sizeof( header ), 1 ) != 1 ||
header.signature != Signature ||
header.formatVersion != CurrentFormatVersion;
}
void readJSONValue( string const & source, string & str, string::size_type & pos)
{
int level = 1;
char endChar;
str.push_back( source[pos] );
if( source[pos] == '{')
endChar = '}';
else if( source[pos] == '[' )
endChar = ']';
else if( source[pos] == '\"' )
{
str.clear();
endChar = '\"';
}
else
endChar = ',';
pos++;
char ch = 0;
char lastCh = 0;
while( !( ch == endChar && lastCh != '\\' && level == 0 )
&& pos < source.size() )
{
lastCh = ch;
ch = source[ pos++ ];
if( ( ch == '{' || ch == '[' ) && lastCh != '\\' )
level++;
if( ( ch == '}' || ch == ']' ) && lastCh != '\\' )
level--;
if( ch == endChar &&
( ( ch == '\"' && lastCh != '\\' ) || ch == ',' )
&& level == 1)
break;
str.push_back( ch );
}
}
map< string, string > parseMetaData( string const & metaData )
{
// Parsing JSON string
map< string, string > data;
string name, value;
string::size_type n = 0;
while( n < metaData.length() && metaData[n] != '{' )
n++;
while( n < metaData.length() )
{
// Skip to '"'
while( n < metaData.length() && metaData[n] != '\"' )
n++;
if( ++n >= metaData.length() )
break;
// Read name
while( n < metaData.length() &&
!( ( metaData[n] == '\"' || metaData[n] == '{' ) && metaData[n-1] != '\\' ) )
name.push_back( metaData[n++]);
// Skip to ':'
if( ++n >= metaData.length() )
break;
while( n < metaData.length() && metaData[n] != ':' )
n++;
if( ++n >= metaData.length() )
break;
// Find value start after ':'
while( n < metaData.length()
&& !( ( metaData[n] == '\"'
|| metaData[n] == '{'
|| metaData[n] == '['
|| ( metaData[n] >= '0' && metaData[n] <= '9' ) )
&& metaData[n-1] != '\\' ) )
n++;
if( n >= metaData.length() )
break;
readJSONValue( metaData, value, n);
data[name] = value;
name.clear();
value.clear();
if( ++n >= metaData.length() )
break;
}
return data;
}
class AardDictionary: public BtreeIndexing::BtreeDictionary
{
Mutex idxMutex;
Mutex aardMutex;
File::Class idx;
IdxHeader idxHeader;
ChunkedStorage::Reader chunks;
string dictionaryName;
File::Class df;
public:
AardDictionary( string const & id, string const & indexFile,
vector< string > const & dictionaryFiles );
~AardDictionary();
virtual string getName() throw()
{ return dictionaryName; }
virtual map< Dictionary::Property, string > getProperties() throw()
{ return map< Dictionary::Property, string >(); }
virtual unsigned long getArticleCount() throw()
{ return idxHeader.articleCount; }
virtual unsigned long getWordCount() throw()
{ return idxHeader.wordCount; }
inline virtual quint32 getLangFrom() const
{ return idxHeader.langFrom; }
inline virtual quint32 getLangTo() const
{ return idxHeader.langTo; }
virtual sptr< Dictionary::DataRequest > getArticle( wstring const &,
vector< wstring > const & alts,
wstring const &,
bool ignoreDiacritics )
;
virtual QString const& getDescription();
virtual sptr< Dictionary::DataRequest > getSearchResults( QString const & searchString,
int searchMode, bool matchCase,
int distanceBetweenWords,
int maxResults,
bool ignoreWordsOrder,
bool ignoreDiacritics );
virtual void getArticleText( uint32_t articleAddress, QString & headword, QString & text );
virtual void makeFTSIndex(QAtomicInt & isCancelled, bool firstIteration );
virtual void setFTSParameters( Config::FullTextSearch const & fts )
{
can_FTS = fts.enabled
&& !fts.disabledTypes.contains( "AARD", Qt::CaseInsensitive )
&& ( fts.maxDictionarySize == 0 || getArticleCount() <= fts.maxDictionarySize );
}
protected:
virtual void loadIcon() throw();
private:
/// Loads the article.
void loadArticle( quint32 address,
string & articleText,
bool rawText = false );
string convert( string const & in_data );
friend class AardArticleRequest;
};
AardDictionary::AardDictionary( string const & id,
string const & indexFile,
vector< string > const & dictionaryFiles ):
BtreeDictionary( id, dictionaryFiles ),
idx( indexFile, "rb" ),
idxHeader( idx.read< IdxHeader >() ),
chunks( idx, idxHeader.chunksOffset ),
df( dictionaryFiles[ 0 ], "rb" )
{
// Read dictionary name
idx.seek( sizeof( idxHeader ) );
vector< char > dName( idx.read< quint32 >() );
if( dName.size() )
{
idx.read( &dName.front(), dName.size() );
dictionaryName = string( &dName.front(), dName.size() );
}
// Initialize the index
openIndex( IndexInfo( idxHeader.indexBtreeMaxElements,
idxHeader.indexRootOffset ),
idx, idxMutex );
// Full-text search parameters
can_FTS = true;
ftsIdxName = indexFile + "_FTS";
if( !Dictionary::needToRebuildIndex( dictionaryFiles, ftsIdxName )
&& !FtsHelpers::ftsIndexIsOldOrBad( ftsIdxName, this ) )
FTS_index_completed.ref();
}
AardDictionary::~AardDictionary()
{
df.close();
}
void AardDictionary::loadIcon() throw()
{
if ( dictionaryIconLoaded )
return;
QString fileName =
QDir::fromNativeSeparators( FsEncoding::decode( getDictionaryFilenames()[ 0 ].c_str() ) );
// Remove the extension
fileName.chop( 3 );
if( !loadIconFromFile( fileName ) )
{
// Load failed -- use default icons
dictionaryNativeIcon = dictionaryIcon = QIcon(":/icons/icon32_aard.png");
}
dictionaryIconLoaded = true;
}
string AardDictionary::convert( const string & in )
{
string inConverted;
char inCh, lastCh = 0;
bool afterEol = false;
for( string::const_iterator i = in.begin(), j = in.end(); i != j; ++i )
{
inCh = *i;
if( lastCh == '\\' )
{
inConverted.erase( inConverted.size() - 1 );
lastCh = 0;
if( inCh == 'n' )
{
inConverted.append( "<br/>");
afterEol = true;
continue;
}
else if( inCh == 'r')
continue;
}
else if( inCh == ' ' && afterEol )
{
inConverted.append( " " );
continue;
} else
lastCh = inCh;
afterEol = false;
inConverted.push_back( inCh );
}
QString text = QString::fromUtf8( inConverted.c_str() );
text.replace( QRegularExpression( "<\\s*a\\s+href\\s*=\\s*\\\"(w:|s:){0,1}([^#](?!ttp://)[^\\\"]*)(.)",
QRegularExpression::DotMatchesEverythingOption ),
"<a href=\"bword:\\2\"");
text.replace( QRegularExpression( "<\\s*a\\s+href\\s*=\\s*'(w:|s:){0,1}([^#](?!ttp://)[^']*)(.)",
QRegularExpression::DotMatchesEverythingOption ),
"<a href=\"bword:\\2\"");
// Anchors
text.replace( QRegularExpression( "<a\\s+href=\"bword:([^#\"]+)#([^\"]+)" ),
"<a href=\"gdlookup://localhost/\\1?gdanchor=\\2" );
static QRegularExpression self_closing_divs( "(<div\\s+[^>]*)/>",
QRegularExpression::CaseInsensitiveOption ); // <div ... />
text.replace( self_closing_divs, "\\1></div>" );
// Fix outstanding elements
text += "<br style=\"clear:both;\" />";
return text.toUtf8().data();
}
void AardDictionary::loadArticle( quint32 address,
string & articleText,
bool rawText )
{
quint32 articleOffset = address;
quint32 articleSize;
quint32 size;
vector< char > articleBody;
articleText.clear();
while( 1 )
{
articleText = string( QObject::tr( "Article loading error" ).toUtf8().constData() );
try
{
Mutex::Lock _( aardMutex );
df.seek( articleOffset );
df.read( &size, sizeof(size) );
articleSize = qFromBigEndian( size );
// Don't try to read and decode too big articles,
// it is most likely error in dictionary
if( articleSize > 1048576 )
break;
articleBody.resize( articleSize );
df.read( &articleBody.front(), articleSize );
}
catch( std::exception &ex )
{
gdWarning( "AARD: Failed loading article from \"%s\", reason: %s\n", getName().c_str(), ex.what() );
break;
}
catch(...)
{
break;
}
if ( articleBody.empty() )
break;
articleText.clear();
string text = decompressBzip2( articleBody.data(), articleSize );
if( text.empty() )
text = decompressZlib( articleBody.data(), articleSize );
if( text.empty() )
text = string( articleBody.data(), articleSize );
if( text.empty() || text[ 0 ] != '[' )
break;
string::size_type n = text.find( '\"' );
if( n == string::npos )
break;
readJSONValue( text, articleText, n );
if( articleText.empty() )
{
n = text.find( "\"r\"" );
if( n != string::npos && n + 3 < text.size() )
{
n = text.find( '\"', n + 3 );
if( n == string::npos )
break;
string link;
readJSONValue( text, link, n );
if( !link.empty() )
{
string encodedLink;
encodedLink.reserve( link.size() );
bool prev = false;
for( string::const_iterator i = link.begin(); i != link.end(); ++i )
{
if( *i == '\\' )
{
if( !prev )
{
prev = true;
continue;
}
}
encodedLink.push_back( *i );
prev = false;
}
encodedLink = string( QUrl( QString::fromUtf8( encodedLink.data(), encodedLink.size() ) ).toEncoded().data() );
articleText = "<a href=\"" + encodedLink + "\">" + link + "</a>";
}
}
}
break;
}
if( !articleText.empty() )
{
if( rawText )
return;
articleText = convert( articleText );
}
else
articleText = string( QObject::tr( "Article decoding error" ).toUtf8().constData() );
// See Issue #271: A mechanism to clean-up invalid HTML cards.
string cleaner = "</font>""</font>""</font>""</font>""</font>""</font>"
"</font>""</font>""</font>""</font>""</font>""</font>"
"</b></b></b></b></b></b></b></b>"
"</i></i></i></i></i></i></i></i>"
"</a></a></a></a></a></a></a></a>";
string prefix( "<div class=\"aard\"" );
if( isToLanguageRTL() )
prefix += " dir=\"rtl\"";
prefix += ">";
articleText = prefix + articleText + cleaner + "</div>";
}
QString const& AardDictionary::getDescription()
{
if( !dictionaryDescription.isEmpty() )
return dictionaryDescription;
AAR_header dictHeader;
quint32 size;
vector< char > data;
{
Mutex::Lock _( aardMutex );
df.seek( 0 );
df.read( &dictHeader, sizeof(dictHeader) );
size = qFromBigEndian( dictHeader.metaLength );
data.resize( size );
df.read( &data.front(), size );
}
string metaStr = decompressBzip2( data.data(), size );
if( metaStr.empty() )
metaStr = decompressZlib( data.data(), size );
map< string, string > meta = parseMetaData( metaStr );
if( !meta.empty() )
{
map< string, string >::const_iterator iter = meta.find( "copyright" );
if( iter != meta.end() )
dictionaryDescription = QString( QObject::tr( "Copyright: %1%2" ) ).arg( QString::fromUtf8( iter->second.c_str() ) ).arg( "\n\n" );
iter = meta.find( "version" );
if( iter != meta.end() )
dictionaryDescription = QString( QObject::tr( "Version: %1%2" ) ).arg( QString::fromUtf8( iter->second.c_str() ) ).arg( "\n\n" );
iter = meta.find( "description" );
if( iter != meta.end() )
{
QString desc = QString::fromUtf8( iter->second.c_str() );
desc.replace( "\\n", "\n" );
desc.replace( "\\t", "\t" );
dictionaryDescription += desc;
}
}
if( dictionaryDescription.isEmpty() )
dictionaryDescription = "NONE";
return dictionaryDescription;
}
void AardDictionary::makeFTSIndex( QAtomicInt & isCancelled, bool firstIteration )
{
if( !( Dictionary::needToRebuildIndex( getDictionaryFilenames(), ftsIdxName )
|| FtsHelpers::ftsIndexIsOldOrBad( ftsIdxName, this ) ) )
FTS_index_completed.ref();
if( haveFTSIndex() )
return;
if( ensureInitDone().size() )
return;
if( firstIteration && getArticleCount() > FTS::MaxDictionarySizeForFastSearch )
return;
gdDebug( "Aard: Building the full-text index for dictionary: %s\n",
getName().c_str() );
try
{
FtsHelpers::makeFTSIndex( this, isCancelled );
FTS_index_completed.ref();
}
catch( std::exception &ex )
{
gdWarning( "Aard: Failed building full-text search index for \"%s\", reason: %s\n", getName().c_str(), ex.what() );
QFile::remove( FsEncoding::decode( ftsIdxName.c_str() ) );
}
}
void AardDictionary::getArticleText( uint32_t articleAddress, QString & headword, QString & text )
{
try
{
headword.clear();
string articleText;
loadArticle( articleAddress, articleText );
text = Html::unescape( QString::fromUtf8( articleText.data(), articleText.size() ) );
}
catch( std::exception &ex )
{
gdWarning( "Aard: Failed retrieving article from \"%s\", reason: %s\n", getName().c_str(), ex.what() );
}
}
sptr< Dictionary::DataRequest > AardDictionary::getSearchResults( QString const & searchString,
int searchMode, bool matchCase,
int distanceBetweenWords,
int maxResults,
bool ignoreWordsOrder,
bool ignoreDiacritics )
{
return new FtsHelpers::FTSResultsRequest( *this, searchString,searchMode, matchCase, distanceBetweenWords, maxResults, ignoreWordsOrder, ignoreDiacritics );
}
/// AardDictionary::getArticle()
class AardArticleRequest;
class AardArticleRequestRunnable: public QRunnable
{
AardArticleRequest & r;
QSemaphore & hasExited;
public:
AardArticleRequestRunnable( AardArticleRequest & r_,
QSemaphore & hasExited_ ): r( r_ ),
hasExited( hasExited_ )
{}
~AardArticleRequestRunnable()
{
hasExited.release();
}
virtual void run();
};
class AardArticleRequest: public Dictionary::DataRequest
{
friend class AardArticleRequestRunnable;
wstring word;
vector< wstring > alts;
AardDictionary & dict;
bool ignoreDiacritics;
QAtomicInt isCancelled;
QSemaphore hasExited;
public:
AardArticleRequest( wstring const & word_,
vector< wstring > const & alts_,
AardDictionary & dict_, bool ignoreDiacritics_ ):
word( word_ ), alts( alts_ ), dict( dict_ ), ignoreDiacritics( ignoreDiacritics_ )
{
QThreadPool::globalInstance()->start(
new AardArticleRequestRunnable( *this, hasExited ) );
}
void run(); // Run from another thread by DslArticleRequestRunnable
virtual void cancel()
{
isCancelled.ref();
}
~AardArticleRequest()
{
isCancelled.ref();
hasExited.acquire();
}
};
void AardArticleRequestRunnable::run()
{
r.run();
}
void AardArticleRequest::run()
{
if ( Utils::AtomicInt::loadAcquire( isCancelled ) )
{
finish();
return;
}
vector< WordArticleLink > chain = dict.findArticles( word, ignoreDiacritics );
for( unsigned x = 0; x < alts.size(); ++x )
{
/// Make an additional query for each alt
vector< WordArticleLink > altChain = dict.findArticles( alts[ x ], ignoreDiacritics );
chain.insert( chain.end(), altChain.begin(), altChain.end() );
}
multimap< wstring, pair< string, string > > mainArticles, alternateArticles;
set< quint32 > articlesIncluded; // Some synonims make it that the articles
// appear several times. We combat this
// by only allowing them to appear once.
wstring wordCaseFolded = Folding::applySimpleCaseOnly( word );
if( ignoreDiacritics )
wordCaseFolded = Folding::applyDiacriticsOnly( wordCaseFolded );
for( unsigned x = 0; x < chain.size(); ++x )
{
if ( Utils::AtomicInt::loadAcquire( isCancelled ) )
{
finish();
return;
}
if ( articlesIncluded.find( chain[ x ].articleOffset ) != articlesIncluded.end() )
continue; // We already have this article in the body.
// Now grab that article
string headword, articleText;
headword = chain[ x ].word;
try
{
dict.loadArticle( chain[ x ].articleOffset, articleText );
}
catch(...)
{
}
// Ok. Now, does it go to main articles, or to alternate ones? We list
// main ones first, and alternates after.
// We do the case-folded comparison here.
wstring headwordStripped =
Folding::applySimpleCaseOnly( Utf8::decode( headword ) );
if( ignoreDiacritics )
headwordStripped = Folding::applyDiacriticsOnly( headwordStripped );
multimap< wstring, pair< string, string > > & mapToUse =
( wordCaseFolded == headwordStripped ) ?
mainArticles : alternateArticles;
mapToUse.insert( pair< wstring, pair< string, string > >(
Folding::applySimpleCaseOnly( Utf8::decode( headword ) ),
pair< string, string >( headword, articleText ) ) );
articlesIncluded.insert( chain[ x ].articleOffset );
}
if ( mainArticles.empty() && alternateArticles.empty() )
{
// No such word
finish();
return;
}
string result;
multimap< wstring, pair< string, string > >::const_iterator i;
for( i = mainArticles.begin(); i != mainArticles.end(); ++i )
{
result += "<h3>";
result += i->second.first;
result += "</h3>";
result += i->second.second;
}
for( i = alternateArticles.begin(); i != alternateArticles.end(); ++i )
{
result += "<h3>";
result += i->second.first;
result += "</h3>";
result += i->second.second;
}
Mutex::Lock _( dataMutex );
data.resize( result.size() );
memcpy( &data.front(), result.data(), result.size() );
hasAnyData = true;
finish();
}
sptr< Dictionary::DataRequest > AardDictionary::getArticle( wstring const & word,
vector< wstring > const & alts,
wstring const &,
bool ignoreDiacritics )
{
return new AardArticleRequest( word, alts, *this, ignoreDiacritics );
}
} // anonymous namespace
vector< sptr< Dictionary::Class > > makeDictionaries(
vector< string > const & fileNames,
string const & indicesDir,
Dictionary::Initializing & initializing,
unsigned maxHeadwordsToExpand )
{
vector< sptr< Dictionary::Class > > dictionaries;
for( vector< string >::const_iterator i = fileNames.begin(); i != fileNames.end();
++i )
{
// Skip files with the extensions different to .aar to speed up the
// scanning
if ( i->size() < 4 ||
strcasecmp( i->c_str() + ( i->size() - 4 ), ".aar" ) != 0 )
continue;
// Got the file -- check if we need to rebuid the index
vector< string > dictFiles( 1, *i );
string dictId = Dictionary::makeDictionaryId( dictFiles );
string indexFile = indicesDir + dictId;
if ( Dictionary::needToRebuildIndex( dictFiles, indexFile ) ||
indexIsOldOrBad( indexFile ) )
{
try
{
gdDebug( "Aard: Building the index for dictionary: %s\n", i->c_str() );
{
QFileInfo info( FsEncoding::decode( i->c_str() ) );
if( static_cast< quint64 >( info.size() ) > ULONG_MAX )
{
gdWarning( "File %s is too large\n", i->c_str() );
continue;
}
}
File::Class df( *i, "rb" );
AAR_header dictHeader;
df.read( &dictHeader, sizeof(dictHeader) );
bool has64bitIndex = !strncmp( dictHeader.indexItemFormat, ">LQ", 4 );
if( strncmp( dictHeader.signature, "aard", 4 )
|| ( !has64bitIndex && strncmp( dictHeader.indexItemFormat, ">LL", 4 ) )
|| strncmp( dictHeader.keyLengthFormat, ">H", 2 )
|| strncmp( dictHeader.articleLengthFormat, ">L", 2) )
{
gdWarning( "File %s is not in supported aard format\n", i->c_str() );
continue;
}
vector< char > data;
quint32 size = qFromBigEndian( dictHeader.metaLength );
if( size == 0 )
{
gdWarning( "File %s has invalid metadata", i->c_str() );
continue;
}
data.resize( size );
df.read( &data.front(), size );
string metaStr = decompressBzip2( data.data(), size );
if( metaStr.empty() )
metaStr = decompressZlib( data.data(), size );
map< string, string > meta = parseMetaData( metaStr );
if( meta.empty() )
{
gdWarning( "File %s has invalid metadata", i->c_str() );
continue;
}
string dictName;
map< string, string >::const_iterator iter = meta.find( "title" );
if( iter != meta.end() )
dictName = iter->second;
string langFrom;
iter = meta.find( "index_language" );
if( iter != meta.end() )
langFrom = iter->second;
string langTo;
iter = meta.find( "article_language" );
if( iter != meta.end() )
langTo = iter->second;
if( ( dictName.compare( "Wikipedia") == 0 || dictName.compare( "Wikiquote" ) == 0 || dictName.compare( "Wiktionary" ) == 0 )
&& !langTo.empty() )
{
string capitalized = langTo.c_str();
capitalized[0] = toupper( capitalized[0] );
dictName = dictName + " (" + capitalized + ")";
}
quint16 volumes = qFromBigEndian( dictHeader.totalVolumes );
if( volumes > 1 )
{
QString ss=QString( " (%1/%2)").arg( qFromBigEndian( dictHeader.volume ), volumes );
dictName += ss.toLocal8Bit().data();
}
initializing.indexingDictionary( dictName );
File::Class idx( indexFile, "wb" );
IdxHeader idxHeader;
memset( &idxHeader, 0, sizeof( idxHeader ) );
// We write a dummy header first. At the end of the process the header
// will be rewritten with the right values.
idx.write( idxHeader );
idx.write( (quint32) dictName.size() );
if( !dictName.empty() )
idx.write( dictName.data(), dictName.size() );
IndexedWords indexedWords;
ChunkedStorage::Writer chunks( idx );
quint32 wordCount = qFromBigEndian( dictHeader.wordsCount );
set< quint32 > articleOffsets;
quint32 pos = df.tell();
quint32 wordsBase = pos + wordCount * ( has64bitIndex ? sizeof( IndexElement64 ) : sizeof( IndexElement ) );
quint32 articlesBase = qFromBigEndian( dictHeader.articleOffset );
data.clear();
for( quint32 j = 0; j < wordCount; j++ )
{
quint32 articleOffset;
quint32 wordOffset;
if( has64bitIndex )
{
IndexElement64 el64;
df.seek( pos );
df.read( &el64, sizeof(el64) );
articleOffset = articlesBase + qFromBigEndian( el64.articleOffset );
wordOffset = wordsBase + qFromBigEndian( el64.wordOffset );
}
else
{
IndexElement el;
df.seek( pos );
df.read( &el, sizeof(el) );
articleOffset = articlesBase + qFromBigEndian( el.articleOffset );
wordOffset = wordsBase + qFromBigEndian( el.wordOffset );
}
df.seek( wordOffset );