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 }
  50
  51 WrapStreamForShare::~WrapStreamForShare()
  52 {
  53 }
  54
  55 // XInputStream
  56 sal_Int32 SAL_CALL WrapStreamForShare::readBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
  57 {
  58     if ( !m_xInStream.is() )
  59         throw io::IOException(THROW_WHERE );
  60
  61     m_xSeekable->seek( m_nCurPos );
  62
  63     sal_Int32 nRead = m_xInStream->readBytes( aData, nBytesToRead );
  64     m_nCurPos += nRead;
  65
  66     return nRead;
  67 }
  68
  69 sal_Int32 SAL_CALL WrapStreamForShare::readSomeBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
  70 {
  71     if ( !m_xInStream.is() )
  72         throw io::IOException(THROW_WHERE );
  73
  74     m_xSeekable->seek( m_nCurPos );
  75
  76     sal_Int32 nRead = m_xInStream->readSomeBytes( aData, nMaxBytesToRead );
  77     m_nCurPos += nRead;
  78
  79     return nRead;
  80 }
  81
  82 void SAL_CALL WrapStreamForShare::skipBytes( sal_Int32 nBytesToSkip )
  83 {
  84     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
  85
  86     if ( !m_xInStream.is() )
  87         throw io::IOException(THROW_WHERE );
  88
  89     m_xSeekable->seek( m_nCurPos );
  90
  91     m_xInStream->skipBytes( nBytesToSkip );
  92     m_nCurPos = m_xSeekable->getPosition();
  93 }
  94
  95 sal_Int32 SAL_CALL WrapStreamForShare::available()
  96 {
  97     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
  98
  99     if ( !m_xInStream.is() )
 100         throw io::IOException(THROW_WHERE );
 101
 102     return m_xInStream->available();
 103 }
 104
 105 void SAL_CALL WrapStreamForShare::closeInput()
 106 {
 107     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 108
 109     if ( !m_xInStream.is() )
 110         throw io::IOException(THROW_WHERE );
 111
 112     // the package is the owner so it will close the stream
 113     // m_xInStream->closeInput();
 114     m_xInStream.clear();
 115     m_xSeekable.clear();
 116 }
 117
 118 // XSeekable
 119 void SAL_CALL WrapStreamForShare::seek( sal_Int64 location )
 120 {
 121     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 122
 123     if ( !m_xInStream.is() )
 124         throw io::IOException(THROW_WHERE );
 125
 126     // let stream implementation do all the checking
 127     m_xSeekable->seek( location );
 128
 129     m_nCurPos = m_xSeekable->getPosition();
 130 }
 131
 132 sal_Int64 SAL_CALL WrapStreamForShare::getPosition()
 133 {
 134     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 135
 136     if ( !m_xInStream.is() )
 137         throw io::IOException(THROW_WHERE );
 138
 139     return m_nCurPos;
 140 }
 141
 142 sal_Int64 SAL_CALL WrapStreamForShare::getLength()
 143 {
 144     ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 145
 146     if ( !m_xInStream.is() )
 147         throw io::IOException(THROW_WHERE );
 148
 149     return m_xSeekable->getLength();
 150 }
 151
 152 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */