mirror of
https://github.com/xiaoyifang/goldendict-ng.git
synced 2024-11-30 13:24:05 +00:00
112 lines
2.3 KiB
C++
112 lines
2.3 KiB
C++
/* This file is (c) 2008-2011 Konstantin Isakov <ikm@goldendict.org>
|
|
* Part of GoldenDict. Licensed under GPLv3 or later, see the LICENSE file */
|
|
|
|
#include "indexedzip.hh"
|
|
#include "zipfile.hh"
|
|
#include <zlib.h>
|
|
#include "dprintf.hh"
|
|
|
|
using namespace BtreeIndexing;
|
|
using std::vector;
|
|
|
|
bool IndexedZip::openZipFile( QString const & name )
|
|
{
|
|
zip.setFileName( name );
|
|
|
|
zipIsOpen = zip.open( QFile::ReadOnly );
|
|
|
|
return zipIsOpen;
|
|
}
|
|
|
|
bool IndexedZip::hasFile( gd::wstring const & name )
|
|
{
|
|
if ( !zipIsOpen )
|
|
return false;
|
|
|
|
vector< WordArticleLink > links = findArticles( name );
|
|
|
|
return !links.empty();
|
|
}
|
|
|
|
bool IndexedZip::loadFile( gd::wstring const & name, vector< char > & data )
|
|
{
|
|
if ( !zipIsOpen )
|
|
return false;
|
|
|
|
vector< WordArticleLink > links = findArticles( name );
|
|
|
|
if ( links.empty() )
|
|
return false;
|
|
|
|
// Now seek into the zip file and read its header
|
|
|
|
if ( !zip.seek( links[ 0 ].articleOffset ) )
|
|
return false;
|
|
|
|
ZipFile::LocalFileHeader header;
|
|
|
|
if ( !ZipFile::readLocalHeader( zip, header ) )
|
|
{
|
|
DPRINTF( "Failed to load header\n" );
|
|
return false;
|
|
}
|
|
|
|
// Which algorithm was used?
|
|
|
|
switch( header.compressionMethod )
|
|
{
|
|
case ZipFile::Uncompressed:
|
|
DPRINTF( "Uncompressed\n" );
|
|
data.resize( header.uncompressedSize );
|
|
return zip.read( &data.front(), data.size() ) == data.size();
|
|
|
|
case ZipFile::Deflated:
|
|
{
|
|
DPRINTF( "Deflated\n" );
|
|
|
|
// Now do the deflation
|
|
|
|
QByteArray compressedData = zip.read( header.compressedSize );
|
|
|
|
if ( compressedData.size() != (int)header.compressedSize )
|
|
return false;
|
|
|
|
data.resize( header.uncompressedSize );
|
|
|
|
z_stream stream;
|
|
|
|
memset( &stream, 0, sizeof( stream ) );
|
|
|
|
stream.next_in = ( Bytef * ) compressedData.data();
|
|
stream.avail_in = compressedData.size();
|
|
stream.next_out = ( Bytef * ) &data.front();
|
|
stream.avail_out = data.size();
|
|
|
|
if ( inflateInit2( &stream, -MAX_WBITS ) != Z_OK )
|
|
{
|
|
data.clear();
|
|
return false;
|
|
}
|
|
|
|
if ( inflate( &stream, Z_FINISH ) != Z_STREAM_END )
|
|
{
|
|
DPRINTF( "Not zstream end!" );
|
|
|
|
data.clear();
|
|
|
|
inflateEnd( &stream );
|
|
|
|
return false;
|
|
}
|
|
|
|
inflateEnd( &stream );
|
|
|
|
return true;
|
|
}
|
|
|
|
default:
|
|
|
|
return false;
|
|
}
|
|
}
|