package/source/zippackage/ZipPackageBuffer.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <ZipPackageBuffer.hxx>
  21 #include <string.h> // for memcpy
  22
  23 using namespace ::com::sun::star;
  24 using namespace com::sun::star::uno;
  25 using namespace com::sun::star::io;
  26 using com::sun::star::lang::IllegalArgumentException;
  27
  28 ZipPackageBuffer::ZipPackageBuffer(sal_Int64 nNewBufferSize )
  29 : m_nBufferSize (nNewBufferSize)
  30 , m_nEnd(0)
  31 , m_nCurrent(0)
  32 , m_bMustInitBuffer ( sal_True )
  33 {
  34 }
  35 ZipPackageBuffer::~ZipPackageBuffer(void)
  36 {
  37 }
  38
  39 sal_Int32 SAL_CALL ZipPackageBuffer::readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
  40         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
  41 {
  42     if (nBytesToRead < 0)
  43         throw BufferSizeExceededException(OSL_LOG_PREFIX, *this );
  44
  45     if (nBytesToRead + m_nCurrent > m_nEnd)
  46         nBytesToRead = static_cast < sal_Int32 > (m_nEnd - m_nCurrent);
  47
  48     aData.realloc ( nBytesToRead );
  49     memcpy(aData.getArray(), m_aBuffer.getConstArray() + m_nCurrent, nBytesToRead);
  50     m_nCurrent +=nBytesToRead;
  51     return nBytesToRead;
  52 }
  53
  54 sal_Int32 SAL_CALL ZipPackageBuffer::readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
  55         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
  56 {
  57     return readBytes(aData, nMaxBytesToRead);
  58 }
  59 void SAL_CALL ZipPackageBuffer::skipBytes( sal_Int32 nBytesToSkip )
  60         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
  61 {
  62     if (nBytesToSkip < 0)
  63         throw BufferSizeExceededException(OSL_LOG_PREFIX, *this );
  64
  65     if (nBytesToSkip + m_nCurrent > m_nEnd)
  66         nBytesToSkip = static_cast < sal_Int32 > (m_nEnd - m_nCurrent);
  67
  68     m_nCurrent+=nBytesToSkip;
  69 }
  70 sal_Int32 SAL_CALL ZipPackageBuffer::available(  )
  71         throw(NotConnectedException, IOException, RuntimeException)
  72 {
  73     return static_cast < sal_Int32 > (m_nEnd - m_nCurrent);
  74 }
  75 void SAL_CALL ZipPackageBuffer::closeInput(  )
  76         throw(NotConnectedException, IOException, RuntimeException)
  77 {
  78 }
  79 void SAL_CALL ZipPackageBuffer::writeBytes( const Sequence< sal_Int8 >& aData )
  80         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
  81 {
  82     sal_Int64 nDataLen = aData.getLength(), nCombined = m_nEnd + nDataLen;
  83
  84     if ( nCombined > m_nBufferSize)
  85     {
  86         do
  87             m_nBufferSize *=2;
  88         while (nCombined > m_nBufferSize);
  89         m_aBuffer.realloc(static_cast < sal_Int32 > (m_nBufferSize));
  90         m_bMustInitBuffer = sal_False;
  91     }
  92     else if (m_bMustInitBuffer)
  93     {
  94          m_aBuffer.realloc ( static_cast < sal_Int32 > ( m_nBufferSize ) );
  95         m_bMustInitBuffer = sal_False;
  96     }
  97     memcpy( m_aBuffer.getArray() + m_nCurrent, aData.getConstArray(), static_cast < sal_Int32 > (nDataLen));
  98     m_nCurrent+=nDataLen;
  99     if (m_nCurrent>m_nEnd)
 100         m_nEnd = m_nCurrent;
 101 }
 102 void SAL_CALL ZipPackageBuffer::flush(  )
 103         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
 104 {
 105 }
 106 void SAL_CALL ZipPackageBuffer::closeOutput(  )
 107         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
 108 {
 109 }
 110 void SAL_CALL ZipPackageBuffer::seek( sal_Int64 location )
 111         throw( IllegalArgumentException, IOException, RuntimeException)
 112 {
 113     if ( location > m_nEnd || location < 0 )
 114         throw IllegalArgumentException(OSL_LOG_PREFIX, uno::Reference< uno::XInterface >(), 1 );
 115     m_nCurrent = location;
 116 }
 117 sal_Int64 SAL_CALL ZipPackageBuffer::getPosition(  )
 118         throw(IOException, RuntimeException)
 119 {
 120     return m_nCurrent;
 121 }
 122 sal_Int64 SAL_CALL ZipPackageBuffer::getLength(  )
 123         throw(IOException, RuntimeException)
 124 {
 125     return m_nEnd;
 126 }
 127
 128 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */