package/source/zippackage/wrapstreamforshare.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 <sal/config.h>
  21 #include <sal/log.hxx>
  22
  23 #include <com/sun/star/io/IOException.hpp>
  24 #include <utility>
  25 #include <osl/diagnose.h>
  26
  27 #include "wrapstreamforshare.hxx"
  28
  29 using namespace ::com::sun::star;
  30
  31 #if OSL_DEBUG_LEVEL > 0
  32 #define THROW_WHERE SAL_WHERE
  33 #else
  34 #define THROW_WHERE ""
  35 #endif
  36
  37 WrapStreamForShare::WrapStreamForShare( uno::Reference< io::XInputStream > xInStream,
  38                                         rtl::Reference< comphelper::RefCountedMutex > xMutexRef )
  39 : m_xMutex(std::move( xMutexRef ))
  40 , m_xInStream(std::move( xInStream ))
  41 , m_nCurPos( 0 )
  42 {
  43     if ( !m_xMutex.is() || !m_xInStream.is() )
  44     {
  45         OSL_FAIL( "Wrong initialization of wrapping stream!" );
  46         throw uno::RuntimeException(THROW_WHERE );
  47     }
  48     m_xSeekable.set( m_xInStream, uno::UNO_QUERY_THROW );
  49     mpByteReader = dynamic_cast<comphelper::ByteReader*>(m_xInStream.get());
  50     assert(mpByteReader);
  51 }
  52
  53 WrapStreamForShare::~WrapStreamForShare()
  54 {
  55 }
  56
  57 // XInputStream
  58 sal_Int32 SAL_CALL WrapStreamForShare::readBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
  59 {
  60     if ( !m_xInStream.is() )
  61         throw io::IOException(THROW_WHERE );
  62
  63     m_xSeekable->seek( m_nCurPos );
  64
  65     sal_Int32 nRead = m_xInStream->readBytes( aData, nBytesToRead );
  66     m_nCurPos += nRead;
  67
  68     return nRead;
  69 }
  70
  71 sal_Int32 SAL_CALL WrapStreamForShare::readSomeBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
  72 {
  73     if ( !m_xInStream.is() )
  74         throw io::IOException(THROW_WHERE );
  75
  76     m_xSeekable->seek( m_nCurPos );
  77
  78     sal_Int32 nRead = m_xInStream->readSomeBytes( aData, nMaxBytesToRead );
  79     m_nCurPos += nRead;
  80
  81     return nRead;
  82 }
  83
  84 sal_Int32 WrapStreamForShare::readSomeBytes( sal_Int8* aData, sal_Int32 nMaxBytesToRead )
  85 {
  86     if ( !m_xInStream.is() )
  87         throw io::IOException(THROW_WHERE );
  88
  89     m_xSeekable->seek( m_nCurPos );
  90
  91     sal_Int32 nRead = mpByteReader->readSomeBytes( aData, nMaxBytesToRead );
  92     m_nCurPos += nRead;
  93
  94     return nRead;
  95 }
  96
  97 void SAL_CALL WrapStreamForShare::skipBytes( sal_Int32 nBytesToSkip )
  98 {
  99     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 100
 101     if ( !m_xInStream.is() )
 102         throw io::IOException(THROW_WHERE );
 103
 104     m_xSeekable->seek( m_nCurPos );
 105
 106     m_xInStream->skipBytes( nBytesToSkip );
 107     m_nCurPos = m_xSeekable->getPosition();
 108 }
 109
 110 sal_Int32 SAL_CALL WrapStreamForShare::available()
 111 {
 112     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 113
 114     if ( !m_xInStream.is() )
 115         throw io::IOException(THROW_WHERE );
 116
 117     return m_xInStream->available();
 118 }
 119
 120 void SAL_CALL WrapStreamForShare::closeInput()
 121 {
 122     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 123
 124     if ( !m_xInStream.is() )
 125         throw io::IOException(THROW_WHERE );
 126
 127     // the package is the owner so it will close the stream
 128     // m_xInStream->closeInput();
 129     m_xInStream.clear();
 130     m_xSeekable.clear();
 131     mpByteReader = nullptr;
 132 }
 133
 134 // XSeekable
 135 void SAL_CALL WrapStreamForShare::seek( sal_Int64 location )
 136 {
 137     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 138
 139     if ( !m_xInStream.is() )
 140         throw io::IOException(THROW_WHERE );
 141
 142     // let stream implementation do all the checking
 143     m_xSeekable->seek( location );
 144
 145     m_nCurPos = m_xSeekable->getPosition();
 146 }
 147
 148 sal_Int64 SAL_CALL WrapStreamForShare::getPosition()
 149 {
 150     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 151
 152     if ( !m_xInStream.is() )
 153         throw io::IOException(THROW_WHERE );
 154
 155     return m_nCurPos;
 156 }
 157
 158 sal_Int64 SAL_CALL WrapStreamForShare::getLength()
 159 {
 160     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 161
 162     if ( !m_xInStream.is() )
 163         throw io::IOException(THROW_WHERE );
 164
 165     return m_xSeekable->getLength();
 166 }
 167
 168 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */