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>
  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 #if OSL_DEBUG_LEVEL > 0
  29 #define THROW_WHERE SAL_WHERE
  30 #else
  31 #define THROW_WHERE ""
  32 #endif
  33
  34 ZipPackageBuffer::ZipPackageBuffer(sal_Int64 nNewBufferSize )
  35 : m_nBufferSize (nNewBufferSize)
  36 , m_nEnd(0)
  37 , m_nCurrent(0)
  38 , m_bMustInitBuffer ( true )
  39 {
  40 }
  41 ZipPackageBuffer::~ZipPackageBuffer()
  42 {
  43 }
  44
  45 sal_Int32 SAL_CALL ZipPackageBuffer::readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
  46         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception)
  47 {
  48     if (nBytesToRead < 0)
  49         throw BufferSizeExceededException(THROW_WHERE, *this );
  50
  51     if (nBytesToRead + m_nCurrent > m_nEnd)
  52         nBytesToRead = static_cast < sal_Int32 > (m_nEnd - m_nCurrent);
  53
  54     aData.realloc ( nBytesToRead );
  55     memcpy(aData.getArray(), m_aBuffer.getConstArray() + m_nCurrent, nBytesToRead);
  56     m_nCurrent +=nBytesToRead;
  57     return nBytesToRead;
  58 }
  59
  60 sal_Int32 SAL_CALL ZipPackageBuffer::readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
  61         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception)
  62 {
  63     return readBytes(aData, nMaxBytesToRead);
  64 }
  65 void SAL_CALL ZipPackageBuffer::skipBytes( sal_Int32 nBytesToSkip )
  66         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception)
  67 {
  68     if (nBytesToSkip < 0)
  69         throw BufferSizeExceededException(THROW_WHERE, *this );
  70
  71     if (nBytesToSkip + m_nCurrent > m_nEnd)
  72         nBytesToSkip = static_cast < sal_Int32 > (m_nEnd - m_nCurrent);
  73
  74     m_nCurrent+=nBytesToSkip;
  75 }
  76 sal_Int32 SAL_CALL ZipPackageBuffer::available(  )
  77         throw(NotConnectedException, IOException, RuntimeException, std::exception)
  78 {
  79     return static_cast < sal_Int32 > (m_nEnd - m_nCurrent);
  80 }
  81 void SAL_CALL ZipPackageBuffer::closeInput(  )
  82         throw(NotConnectedException, IOException, RuntimeException, std::exception)
  83 {
  84 }
  85 void SAL_CALL ZipPackageBuffer::writeBytes( const Sequence< sal_Int8 >& aData )
  86         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception)
  87 {
  88     sal_Int64 nDataLen = aData.getLength(), nCombined = m_nEnd + nDataLen;
  89
  90     if ( nCombined > m_nBufferSize)
  91     {
  92         do
  93             m_nBufferSize *=2;
  94         while (nCombined > m_nBufferSize);
  95         m_aBuffer.realloc(static_cast < sal_Int32 > (m_nBufferSize));
  96         m_bMustInitBuffer = false;
  97     }
  98     else if (m_bMustInitBuffer)
  99     {
 100          m_aBuffer.realloc ( static_cast < sal_Int32 > ( m_nBufferSize ) );
 101         m_bMustInitBuffer = false;
 102     }
 103     memcpy( m_aBuffer.getArray() + m_nCurrent, aData.getConstArray(), static_cast < sal_Int32 > (nDataLen));
 104     m_nCurrent+=nDataLen;
 105     if (m_nCurrent>m_nEnd)
 106         m_nEnd = m_nCurrent;
 107 }
 108 void SAL_CALL ZipPackageBuffer::flush(  )
 109         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception)
 110 {
 111 }
 112 void SAL_CALL ZipPackageBuffer::closeOutput(  )
 113         throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException, std::exception)
 114 {
 115 }
 116 void SAL_CALL ZipPackageBuffer::seek( sal_Int64 location )
 117         throw( IllegalArgumentException, IOException, RuntimeException, std::exception)
 118 {
 119     if ( location > m_nEnd || location < 0 )
 120         throw IllegalArgumentException(THROW_WHERE, uno::Reference< uno::XInterface >(), 1 );
 121     m_nCurrent = location;
 122 }
 123 sal_Int64 SAL_CALL ZipPackageBuffer::getPosition(  )
 124         throw(IOException, RuntimeException, std::exception)
 125 {
 126     return m_nCurrent;
 127 }
 128 sal_Int64 SAL_CALL ZipPackageBuffer::getLength(  )
 129         throw(IOException, RuntimeException, std::exception)
 130 {
 131     return m_nEnd;
 132 }
 133
 134 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */