282 lines
9.5 KiB
C++
282 lines
9.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <ZipOutputStream.hxx>
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#include <com/sun/star/packages/zip/ZipConstants.hpp>
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#include <com/sun/star/io/XOutputStream.hpp>
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#include <comphelper/storagehelper.hxx>
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#include <osl/time.h>
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#include <PackageConstants.hxx>
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#include <ZipEntry.hxx>
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#include <ZipPackageStream.hxx>
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using namespace com::sun::star;
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using namespace com::sun::star::io;
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using namespace com::sun::star::uno;
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using namespace com::sun::star::packages::zip::ZipConstants;
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/** This class is used to write Zip files
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*/
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ZipOutputStream::ZipOutputStream( const uno::Reference < io::XOutputStream > &xOStream )
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: m_xStream(xOStream)
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, m_aChucker(xOStream)
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, m_bFinished(false)
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, m_pCurrentEntry(NULL)
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{
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}
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ZipOutputStream::~ZipOutputStream( void )
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{
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for (sal_Int32 i = 0, nEnd = m_aZipList.size(); i < nEnd; i++)
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delete m_aZipList[i];
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}
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void ZipOutputStream::putNextEntry( ZipEntry& rEntry, bool bEncrypt )
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throw(IOException, RuntimeException)
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{
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assert(!m_pCurrentEntry && "Forgot to close an entry before putNextEntry()?");
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if (rEntry.nTime == -1)
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rEntry.nTime = getCurrentDosTime();
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if (rEntry.nMethod == -1)
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rEntry.nMethod = DEFLATED;
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rEntry.nVersion = 20;
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rEntry.nFlag = 1 << 11;
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if (rEntry.nSize == -1 || rEntry.nCompressedSize == -1 ||
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rEntry.nCrc == -1)
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{
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rEntry.nSize = rEntry.nCompressedSize = 0;
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rEntry.nFlag |= 8;
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}
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m_bEncrypt = bEncrypt;
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sal_Int32 nLOCLength = writeLOC(rEntry);
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rEntry.nOffset = m_aChucker.GetPosition() - nLOCLength;
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m_aZipList.push_back( &rEntry );
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m_pCurrentEntry = &rEntry;
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}
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void ZipOutputStream::rawWrite( Sequence< sal_Int8 >& rBuffer, sal_Int32 /*nNewOffset*/, sal_Int32 nNewLength )
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throw(IOException, RuntimeException)
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{
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m_aChucker.WriteBytes( Sequence< sal_Int8 >(rBuffer.getConstArray(), nNewLength) );
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}
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void ZipOutputStream::rawCloseEntry()
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throw(IOException, RuntimeException)
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{
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if ( m_pCurrentEntry->nMethod == DEFLATED && ( m_pCurrentEntry->nFlag & 8 ) )
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writeEXT(*m_pCurrentEntry);
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if (m_bEncrypt)
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m_pCurrentEntry->nMethod = STORED;
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m_pCurrentEntry = NULL;
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}
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void ZipOutputStream::finish( )
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throw(IOException, RuntimeException)
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{
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if (m_bFinished)
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return;
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if (m_aZipList.size() < 1)
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OSL_FAIL("Zip file must have at least one entry!\n");
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sal_Int32 nOffset= static_cast < sal_Int32 > (m_aChucker.GetPosition());
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for (sal_Int32 i =0, nEnd = m_aZipList.size(); i < nEnd; i++)
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writeCEN( *m_aZipList[i] );
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writeEND( nOffset, static_cast < sal_Int32 > (m_aChucker.GetPosition()) - nOffset);
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m_bFinished = true;
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m_xStream->flush();
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}
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void ZipOutputStream::writeEND(sal_uInt32 nOffset, sal_uInt32 nLength)
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throw(IOException, RuntimeException)
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{
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m_aChucker << ENDSIG;
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m_aChucker << static_cast < sal_Int16 > ( 0 );
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m_aChucker << static_cast < sal_Int16 > ( 0 );
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m_aChucker << static_cast < sal_Int16 > ( m_aZipList.size() );
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m_aChucker << static_cast < sal_Int16 > ( m_aZipList.size() );
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m_aChucker << nLength;
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m_aChucker << nOffset;
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m_aChucker << static_cast < sal_Int16 > ( 0 );
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}
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static sal_uInt32 getTruncated( sal_Int64 nNum, bool *pIsTruncated )
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{
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if( nNum >= 0xffffffff )
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{
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*pIsTruncated = true;
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return 0xffffffff;
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}
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else
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return static_cast< sal_uInt32 >( nNum );
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}
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void ZipOutputStream::writeCEN( const ZipEntry &rEntry )
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throw(IOException, RuntimeException)
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{
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if ( !::comphelper::OStorageHelper::IsValidZipEntryFileName( rEntry.sPath, true ) )
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throw IOException("Unexpected character is used in file name." );
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OString sUTF8Name = OUStringToOString( rEntry.sPath, RTL_TEXTENCODING_UTF8 );
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sal_Int16 nNameLength = static_cast < sal_Int16 > ( sUTF8Name.getLength() );
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m_aChucker << CENSIG;
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m_aChucker << rEntry.nVersion;
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m_aChucker << rEntry.nVersion;
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m_aChucker << rEntry.nFlag;
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m_aChucker << rEntry.nMethod;
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bool bWrite64Header = false;
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m_aChucker << static_cast < sal_uInt32> ( rEntry.nTime );
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m_aChucker << static_cast < sal_uInt32> ( rEntry.nCrc );
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m_aChucker << getTruncated( rEntry.nCompressedSize, &bWrite64Header );
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m_aChucker << getTruncated( rEntry.nSize, &bWrite64Header );
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m_aChucker << nNameLength;
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m_aChucker << static_cast < sal_Int16> (0);
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m_aChucker << static_cast < sal_Int16> (0);
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m_aChucker << static_cast < sal_Int16> (0);
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m_aChucker << static_cast < sal_Int16> (0);
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m_aChucker << static_cast < sal_Int32> (0);
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m_aChucker << getTruncated( rEntry.nOffset, &bWrite64Header );
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if( bWrite64Header )
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{
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// FIXME64: need to append a ZIP64 header instead of throwing
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// We're about to silently lose people's data - which they are
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// unlikely to appreciate so fail instead:
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throw IOException( "File contains streams that are too large." );
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}
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Sequence < sal_Int8 > aSequence( (sal_Int8*)sUTF8Name.getStr(), sUTF8Name.getLength() );
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m_aChucker.WriteBytes( aSequence );
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}
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void ZipOutputStream::writeEXT( const ZipEntry &rEntry )
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throw(IOException, RuntimeException)
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{
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bool bWrite64Header = false;
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m_aChucker << EXTSIG;
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m_aChucker << static_cast < sal_uInt32> ( rEntry.nCrc );
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m_aChucker << getTruncated( rEntry.nCompressedSize, &bWrite64Header );
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m_aChucker << getTruncated( rEntry.nSize, &bWrite64Header );
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if( bWrite64Header )
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{
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// FIXME64: need to append a ZIP64 header instead of throwing
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// We're about to silently lose people's data - which they are
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// unlikely to appreciate so fail instead:
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throw IOException( "File contains streams that are too large." );
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}
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}
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sal_Int32 ZipOutputStream::writeLOC( const ZipEntry &rEntry )
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throw(IOException, RuntimeException)
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{
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if ( !::comphelper::OStorageHelper::IsValidZipEntryFileName( rEntry.sPath, true ) )
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throw IOException("Unexpected character is used in file name." );
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OString sUTF8Name = OUStringToOString( rEntry.sPath, RTL_TEXTENCODING_UTF8 );
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sal_Int16 nNameLength = static_cast < sal_Int16 > ( sUTF8Name.getLength() );
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m_aChucker << LOCSIG;
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m_aChucker << rEntry.nVersion;
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m_aChucker << rEntry.nFlag;
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// If it's an encrypted entry, we pretend its stored plain text
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if (m_bEncrypt)
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m_aChucker << static_cast < sal_Int16 > ( STORED );
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else
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m_aChucker << rEntry.nMethod;
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bool bWrite64Header = false;
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m_aChucker << static_cast < sal_uInt32 > (rEntry.nTime);
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if ((rEntry.nFlag & 8) == 8 )
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{
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m_aChucker << static_cast < sal_Int32 > (0);
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m_aChucker << static_cast < sal_Int32 > (0);
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m_aChucker << static_cast < sal_Int32 > (0);
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}
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else
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{
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m_aChucker << static_cast < sal_uInt32 > (rEntry.nCrc);
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m_aChucker << getTruncated( rEntry.nCompressedSize, &bWrite64Header );
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m_aChucker << getTruncated( rEntry.nSize, &bWrite64Header );
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}
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m_aChucker << nNameLength;
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m_aChucker << static_cast < sal_Int16 > (0);
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if( bWrite64Header )
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{
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// FIXME64: need to append a ZIP64 header instead of throwing
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// We're about to silently lose people's data - which they are
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// unlikely to appreciate so fail instead:
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throw IOException( "File contains streams that are too large." );
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}
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Sequence < sal_Int8 > aSequence( (sal_Int8*)sUTF8Name.getStr(), sUTF8Name.getLength() );
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m_aChucker.WriteBytes( aSequence );
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return LOCHDR + nNameLength;
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}
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sal_uInt32 ZipOutputStream::getCurrentDosTime()
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{
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oslDateTime aDateTime;
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TimeValue aTimeValue;
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osl_getSystemTime ( &aTimeValue );
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osl_getDateTimeFromTimeValue( &aTimeValue, &aDateTime);
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// at year 2108, there is an overflow
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// -> some decision needs to be made
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// how to handle the ZIP file format (just overflow?)
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// if the current system time is before 1980,
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// then the time traveller will have to make a decision
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// how to handle the ZIP file format before it is invented
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// (just underflow?)
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assert(aDateTime.Year > 1980 && aDateTime.Year < 2108);
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sal_uInt32 nYear = static_cast <sal_uInt32> (aDateTime.Year);
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if (nYear>=1980)
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nYear-=1980;
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else if (nYear>=80)
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{
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nYear-=80;
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}
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sal_uInt32 nResult = static_cast < sal_uInt32>( ( ( ( aDateTime.Day) +
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( 32 * (aDateTime.Month)) +
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( 512 * nYear ) ) << 16) |
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( ( aDateTime.Seconds/2) +
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( 32 * aDateTime.Minutes) +
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( 2048 * static_cast <sal_uInt32 > (aDateTime.Hours) ) ) );
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return nResult;
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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