package/source/zippackage/ZipPackageBuffer.cxx

   1 /*************************************************************************
   2  *
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * Copyright 2008 by Sun Microsystems, Inc.
   6  *
   7  * OpenOffice.org - a multi-platform office productivity suite
   8  *
   9  * $RCSfile: ZipPackageBuffer.cxx,v $
  10  * $Revision: 1.18 $
  11  *
  12  * This file is part of OpenOffice.org.
  13  *
  14  * OpenOffice.org is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU Lesser General Public License version 3
  16  * only, as published by the Free Software Foundation.
  17  *
  18  * OpenOffice.org is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU Lesser General Public License version 3 for more details
  22  * (a copy is included in the LICENSE file that accompanied this code).
  23  *
  24  * You should have received a copy of the GNU Lesser General Public License
  25  * version 3 along with OpenOffice.org.  If not, see
  26  * <http://www.openoffice.org/license.html>
  27  * for a copy of the LGPLv3 License.
  28  *
  29  ************************************************************************/
  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_package.hxx"
  33 #include <ZipPackageBuffer.hxx>
  34 #include <string.h> // for memcpy
  35
  36 using namespace ::com::sun::star;
  37 using namespace com::sun::star::uno;
  38 using namespace com::sun::star::io;
  39 using com::sun::star::lang::IllegalArgumentException;
  40
  41 ZipPackageBuffer::ZipPackageBuffer(sal_Int64 nNewBufferSize )
  42 : m_nBufferSize (nNewBufferSize)
  43 , m_nEnd(0)
  44 , m_nCurrent(0)
  45 , m_bMustInitBuffer ( sal_True )
  46 {
  47 }
  48 ZipPackageBuffer::~ZipPackageBuffer(void)
  49 {
  50 }
  51
  52 sal_Int32 SAL_CALL ZipPackageBuffer::readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
  53         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
  54 {
  55     if (nBytesToRead < 0)
  56         throw BufferSizeExceededException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), *this );
  57
  58     if (nBytesToRead + m_nCurrent > m_nEnd)
  59         nBytesToRead = static_cast < sal_Int32 > (m_nEnd - m_nCurrent);
  60
  61     aData.realloc ( nBytesToRead );
  62     memcpy(aData.getArray(), m_aBuffer.getConstArray() + m_nCurrent, nBytesToRead);
  63     m_nCurrent +=nBytesToRead;
  64     return nBytesToRead;
  65 }
  66
  67 sal_Int32 SAL_CALL ZipPackageBuffer::readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
  68         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
  69 {
  70     return readBytes(aData, nMaxBytesToRead);
  71 }
  72 void SAL_CALL ZipPackageBuffer::skipBytes( sal_Int32 nBytesToSkip )
  73         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
  74 {
  75     if (nBytesToSkip < 0)
  76         throw BufferSizeExceededException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), *this );
  77
  78     if (nBytesToSkip + m_nCurrent > m_nEnd)
  79         nBytesToSkip = static_cast < sal_Int32 > (m_nEnd - m_nCurrent);
  80
  81     m_nCurrent+=nBytesToSkip;
  82 }
  83 sal_Int32 SAL_CALL ZipPackageBuffer::available(  )
  84         throw(NotConnectedException, IOException, RuntimeException)
  85 {
  86     return static_cast < sal_Int32 > (m_nEnd - m_nCurrent);
  87 }
  88 void SAL_CALL ZipPackageBuffer::closeInput(  )
  89         throw(NotConnectedException, IOException, RuntimeException)
  90 {
  91 }
  92 void SAL_CALL ZipPackageBuffer::writeBytes( const Sequence< sal_Int8 >& aData )
  93         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
  94 {
  95     sal_Int64 nDataLen = aData.getLength(), nCombined = m_nEnd + nDataLen;
  96
  97     if ( nCombined > m_nBufferSize)
  98     {
  99         do
 100             m_nBufferSize *=2;
 101         while (nCombined > m_nBufferSize);
 102         m_aBuffer.realloc(static_cast < sal_Int32 > (m_nBufferSize));
 103         m_bMustInitBuffer = sal_False;
 104     }
 105     else if (m_bMustInitBuffer)
 106     {
 107          m_aBuffer.realloc ( static_cast < sal_Int32 > ( m_nBufferSize ) );
 108         m_bMustInitBuffer = sal_False;
 109     }
 110     memcpy( m_aBuffer.getArray() + m_nCurrent, aData.getConstArray(), static_cast < sal_Int32 > (nDataLen));
 111     m_nCurrent+=nDataLen;
 112     if (m_nCurrent>m_nEnd)
 113         m_nEnd = m_nCurrent;
 114 }
 115 void SAL_CALL ZipPackageBuffer::flush(  )
 116         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
 117 {
 118 }
 119 void SAL_CALL ZipPackageBuffer::closeOutput(  )
 120         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
 121 {
 122 }
 123 void SAL_CALL ZipPackageBuffer::seek( sal_Int64 location )
 124         throw( IllegalArgumentException, IOException, RuntimeException)
 125 {
 126     if ( location > m_nEnd || location < 0 )
 127         throw IllegalArgumentException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >(), 1 );
 128     m_nCurrent = location;
 129 }
 130 sal_Int64 SAL_CALL ZipPackageBuffer::getPosition(  )
 131         throw(IOException, RuntimeException)
 132 {
 133     return m_nCurrent;
 134 }
 135 sal_Int64 SAL_CALL ZipPackageBuffer::getLength(  )
 136         throw(IOException, RuntimeException)
 137 {
 138     return m_nEnd;
 139 }