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 #include <sal/log.hxx>
  24
  25 #include <com/sun/star/io/BufferSizeExceededException.hpp>
  26 #include <com/sun/star/lang/IllegalArgumentException.hpp>
  27
  28 using namespace ::com::sun::star;
  29 using namespace com::sun::star::uno;
  30 using namespace com::sun::star::io;
  31 using com::sun::star::lang::IllegalArgumentException;
  32
  33 #if OSL_DEBUG_LEVEL > 0
  34 #define THROW_WHERE SAL_WHERE
  35 #else
  36 #define THROW_WHERE ""
  37 #endif
  38
  39 ZipPackageBuffer::ZipPackageBuffer()
  40 : m_nBufferSize (n_ConstBufferSize)
  41 , m_nEnd(0)
  42 , m_nCurrent(0)
  43 , m_bMustInitBuffer ( true )
  44 {
  45 }
  46 ZipPackageBuffer::~ZipPackageBuffer()
  47 {
  48 }
  49
  50 sal_Int32 SAL_CALL ZipPackageBuffer::readBytes( Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
  51 {
  52     if (nBytesToRead < 0)
  53         throw BufferSizeExceededException(THROW_WHERE, *this );
  54
  55     if (nBytesToRead + m_nCurrent > m_nEnd)
  56         nBytesToRead = static_cast < sal_Int32 > (m_nEnd - m_nCurrent);
  57
  58     aData.realloc ( nBytesToRead );
  59     memcpy(aData.getArray(), m_aBuffer.getConstArray() + m_nCurrent, nBytesToRead);
  60     m_nCurrent +=nBytesToRead;
  61     return nBytesToRead;
  62 }
  63
  64 sal_Int32 SAL_CALL ZipPackageBuffer::readSomeBytes( Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
  65 {
  66     return readBytes(aData, nMaxBytesToRead);
  67 }
  68 void SAL_CALL ZipPackageBuffer::skipBytes( sal_Int32 nBytesToSkip )
  69 {
  70     if (nBytesToSkip < 0)
  71         throw BufferSizeExceededException(THROW_WHERE, *this );
  72
  73     if (nBytesToSkip + m_nCurrent > m_nEnd)
  74         nBytesToSkip = static_cast < sal_Int32 > (m_nEnd - m_nCurrent);
  75
  76     m_nCurrent+=nBytesToSkip;
  77 }
  78 sal_Int32 SAL_CALL ZipPackageBuffer::available(  )
  79 {
  80     return std::min<sal_Int64>(SAL_MAX_INT32, m_nEnd - m_nCurrent);
  81 }
  82 void SAL_CALL ZipPackageBuffer::closeInput(  )
  83 {
  84 }
  85 void SAL_CALL ZipPackageBuffer::writeBytes( const Sequence< sal_Int8 >& aData )
  86 {
  87     sal_Int64 nDataLen = aData.getLength(), nCombined = m_nEnd + nDataLen;
  88
  89     if ( nCombined > m_nBufferSize)
  90     {
  91         do
  92             m_nBufferSize *=2;
  93         while (nCombined > m_nBufferSize);
  94         m_aBuffer.realloc(static_cast < sal_Int32 > (m_nBufferSize));
  95         m_bMustInitBuffer = false;
  96     }
  97     else if (m_bMustInitBuffer)
  98     {
  99         m_aBuffer.realloc ( static_cast < sal_Int32 > ( m_nBufferSize ) );
 100         m_bMustInitBuffer = false;
 101     }
 102     memcpy( m_aBuffer.getArray() + m_nCurrent, aData.getConstArray(), static_cast < sal_Int32 > (nDataLen));
 103     m_nCurrent+=nDataLen;
 104     if (m_nCurrent>m_nEnd)
 105         m_nEnd = m_nCurrent;
 106 }
 107 void SAL_CALL ZipPackageBuffer::flush(  )
 108 {
 109 }
 110 void SAL_CALL ZipPackageBuffer::closeOutput(  )
 111 {
 112 }
 113 void SAL_CALL ZipPackageBuffer::seek( sal_Int64 location )
 114 {
 115     if ( location > m_nEnd || location < 0 )
 116         throw IllegalArgumentException(THROW_WHERE, uno::Reference< uno::XInterface >(), 1 );
 117     m_nCurrent = location;
 118 }
 119 sal_Int64 SAL_CALL ZipPackageBuffer::getPosition(  )
 120 {
 121     return m_nCurrent;
 122 }
 123 sal_Int64 SAL_CALL ZipPackageBuffer::getLength(  )
 124 {
 125     return m_nEnd;
 126 }
 127
 128 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */