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 <PackageConstants.hxx>
  22 #include <string.h>
  23
  24 #include <com/sun/star/io/BufferSizeExceededException.hpp>
  25 #include <com/sun/star/lang/IllegalArgumentException.hpp>
  26
  27 using namespace ::com::sun::star;
  28 using namespace com::sun::star::uno;
  29 using namespace com::sun::star::io;
  30 using com::sun::star::lang::IllegalArgumentException;
  31
  32 #if OSL_DEBUG_LEVEL > 0
  33 #define THROW_WHERE SAL_WHERE
  34 #else
  35 #define THROW_WHERE ""
  36 #endif
  37
  38 ZipPackageBuffer::ZipPackageBuffer()
  39 : m_nBufferSize (n_ConstBufferSize)
  40 , m_nEnd(0)
  41 , m_nCurrent(0)
  42 , m_bMustInitBuffer ( true )
  43 {
  44 }
  45 ZipPackageBuffer::~ZipPackageBuffer()
  46 {
  47 }
  48
  49 sal_Int32 SAL_CALL ZipPackageBuffer::readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
  50 {
  51     if (nBytesToRead < 0)
  52         throw BufferSizeExceededException(THROW_WHERE, *this );
  53
  54     if (nBytesToRead + m_nCurrent > m_nEnd)
  55         nBytesToRead = static_cast < sal_Int32 > (m_nEnd - m_nCurrent);
  56
  57     aData.realloc ( nBytesToRead );
  58     memcpy(aData.getArray(), m_aBuffer.getConstArray() + m_nCurrent, nBytesToRead);
  59     m_nCurrent +=nBytesToRead;
  60     return nBytesToRead;
  61 }
  62
  63 sal_Int32 SAL_CALL ZipPackageBuffer::readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
  64 {
  65     return readBytes(aData, nMaxBytesToRead);
  66 }
  67 void SAL_CALL ZipPackageBuffer::skipBytes( sal_Int32 nBytesToSkip )
  68 {
  69     if (nBytesToSkip < 0)
  70         throw BufferSizeExceededException(THROW_WHERE, *this );
  71
  72     if (nBytesToSkip + m_nCurrent > m_nEnd)
  73         nBytesToSkip = static_cast < sal_Int32 > (m_nEnd - m_nCurrent);
  74
  75     m_nCurrent+=nBytesToSkip;
  76 }
  77 sal_Int32 SAL_CALL ZipPackageBuffer::available(  )
  78 {
  79     return static_cast < sal_Int32 > (m_nEnd - m_nCurrent);
  80 }
  81 void SAL_CALL ZipPackageBuffer::closeInput(  )
  82 {
  83 }
  84 void SAL_CALL ZipPackageBuffer::writeBytes( const Sequence< sal_Int8 >& aData )
  85 {
  86     sal_Int64 nDataLen = aData.getLength(), nCombined = m_nEnd + nDataLen;
  87
  88     if ( nCombined > m_nBufferSize)
  89     {
  90         do
  91             m_nBufferSize *=2;
  92         while (nCombined > m_nBufferSize);
  93         m_aBuffer.realloc(static_cast < sal_Int32 > (m_nBufferSize));
  94         m_bMustInitBuffer = false;
  95     }
  96     else if (m_bMustInitBuffer)
  97     {
  98          m_aBuffer.realloc ( static_cast < sal_Int32 > ( m_nBufferSize ) );
  99         m_bMustInitBuffer = false;
 100     }
 101     memcpy( m_aBuffer.getArray() + m_nCurrent, aData.getConstArray(), static_cast < sal_Int32 > (nDataLen));
 102     m_nCurrent+=nDataLen;
 103     if (m_nCurrent>m_nEnd)
 104         m_nEnd = m_nCurrent;
 105 }
 106 void SAL_CALL ZipPackageBuffer::flush(  )
 107 {
 108 }
 109 void SAL_CALL ZipPackageBuffer::closeOutput(  )
 110 {
 111 }
 112 void SAL_CALL ZipPackageBuffer::seek( sal_Int64 location )
 113 {
 114     if ( location > m_nEnd || location < 0 )
 115         throw IllegalArgumentException(THROW_WHERE, uno::Reference< uno::XInterface >(), 1 );
 116     m_nCurrent = location;
 117 }
 118 sal_Int64 SAL_CALL ZipPackageBuffer::getPosition(  )
 119 {
 120     return m_nCurrent;
 121 }
 122 sal_Int64 SAL_CALL ZipPackageBuffer::getLength(  )
 123 {
 124     return m_nEnd;
 125 }
 126
 127 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */