ucb/source/ucp/cmis/std_inputstream.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
  10 #include <sal/config.h>
  11
  12 #include <com/sun/star/io/IOException.hpp>
  13 #include <com/sun/star/lang/IllegalArgumentException.hpp>
  14 #include <sal/log.hxx>
  15 #include <cppuhelper/queryinterface.hxx>
  16 #include <utility>
  17
  18 #include "std_inputstream.hxx"
  19
  20 using namespace com::sun::star;
  21
  22 namespace cmis
  23 {
  24     StdInputStream::StdInputStream( boost::shared_ptr< std::istream > pStream ) :
  25         m_pStream(std::move( pStream )),
  26         m_nLength( 0 )
  27     {
  28         if (m_pStream)
  29         {
  30             auto nInitPos = m_pStream->tellg( );
  31             m_pStream->seekg( 0, std::ios_base::end );
  32             auto nEndPos = m_pStream->tellg( );
  33             m_pStream->seekg( nInitPos, std::ios_base::beg );
  34
  35             m_nLength = sal_Int64( nEndPos - nInitPos );
  36         }
  37     }
  38
  39     StdInputStream::~StdInputStream()
  40     {
  41     }
  42
  43     uno::Any SAL_CALL StdInputStream::queryInterface( const uno::Type& rType )
  44     {
  45         uno::Any aRet = ::cppu::queryInterface( rType,
  46                                           static_cast< XInputStream* >( this ),
  47                                           static_cast< XSeekable* >( this ) );
  48
  49         return aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType );
  50     }
  51
  52     void SAL_CALL StdInputStream::acquire( ) noexcept
  53     {
  54         OWeakObject::acquire();
  55     }
  56
  57     void SAL_CALL StdInputStream::release( ) noexcept
  58     {
  59         OWeakObject::release();
  60     }
  61
  62     sal_Int32 SAL_CALL StdInputStream::readBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
  63     {
  64         std::scoped_lock aGuard( m_aMutex );
  65
  66         if ( 0 <= nBytesToRead && aData.getLength() < nBytesToRead )
  67             aData.realloc( nBytesToRead );
  68
  69         if (!m_pStream)
  70             throw io::IOException( );
  71
  72         sal_Int32 nRead = 0;
  73         try
  74         {
  75             m_pStream->read( reinterpret_cast< char* >( aData.getArray( ) ), nBytesToRead );
  76             nRead = m_pStream->gcount();
  77         }
  78         catch ( const std::ios_base::failure& e )
  79         {
  80             SAL_INFO( "ucb.ucp.cmis", "StdInputStream::readBytes() error: " << e.what() );
  81             throw io::IOException( );
  82         }
  83
  84         return nRead;
  85     }
  86
  87     sal_Int32 SAL_CALL StdInputStream::readSomeBytes( uno::Sequence< sal_Int8 >& aData,
  88             sal_Int32 nMaxBytesToRead )
  89     {
  90         std::scoped_lock aGuard( m_aMutex );
  91
  92         if ( 0 <= nMaxBytesToRead && aData.getLength() < nMaxBytesToRead )
  93             aData.realloc( nMaxBytesToRead );
  94
  95         if (!m_pStream)
  96             throw io::IOException( );
  97
  98         sal_Int32 nRead = 0;
  99         try
 100         {
 101             nRead = m_pStream->readsome( reinterpret_cast< char* >( aData.getArray( ) ), nMaxBytesToRead );
 102         }
 103         catch ( const std::ios_base::failure& e )
 104         {
 105             SAL_INFO( "ucb.ucp.cmis", "StdInputStream::readBytes() error: " << e.what() );
 106             throw io::IOException( );
 107         }
 108         return nRead;
 109     }
 110
 111     void SAL_CALL StdInputStream::skipBytes( sal_Int32 nBytesToSkip )
 112     {
 113         std::scoped_lock aGuard( m_aMutex );
 114
 115         if (!m_pStream)
 116             throw io::IOException( );
 117
 118         try
 119         {
 120             m_pStream->seekg( nBytesToSkip, std::ios_base::cur );
 121         }
 122         catch ( const std::ios_base::failure& e )
 123         {
 124             SAL_INFO( "ucb.ucp.cmis", "StdInputStream::readBytes() error: " << e.what() );
 125             throw io::IOException( );
 126         }
 127     }
 128
 129     sal_Int32 SAL_CALL StdInputStream::available( )
 130     {
 131         return std::min<sal_Int64>( SAL_MAX_INT32, m_nLength - getPosition() );
 132     }
 133
 134     void SAL_CALL StdInputStream::closeInput( )
 135     {
 136         // No need to implement this for an istream
 137     }
 138
 139     void SAL_CALL StdInputStream::seek( sal_Int64 location )
 140     {
 141         std::scoped_lock aGuard( m_aMutex );
 142
 143         if ( location < 0 || location > m_nLength )
 144             throw lang::IllegalArgumentException(
 145                     "Location can't be negative or greater than the length",
 146                     static_cast< cppu::OWeakObject* >( this ), 0 );
 147
 148         if (!m_pStream)
 149             throw io::IOException( );
 150
 151         try
 152         {
 153             m_pStream->clear( ); // may be needed to rewind the stream
 154             m_pStream->seekg( location, std::ios_base::beg );
 155         }
 156         catch ( const std::ios_base::failure& e )
 157         {
 158             SAL_INFO( "ucb.ucp.cmis", "StdInputStream::readBytes() error: " << e.what() );
 159             throw io::IOException( );
 160         }
 161     }
 162
 163     sal_Int64 SAL_CALL StdInputStream::getPosition( )
 164     {
 165         std::scoped_lock aGuard( m_aMutex );
 166
 167         if (!m_pStream)
 168             throw io::IOException( );
 169
 170         sal_Int64 nPos = m_pStream->tellg( );
 171         if ( -1 == nPos )
 172             throw io::IOException( );
 173
 174         return nPos;
 175     }
 176
 177     sal_Int64 SAL_CALL StdInputStream::getLength( )
 178     {
 179         return m_nLength;
 180     }
 181 }
 182
 183 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */