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