ucbhelper/source/provider/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 "ucbhelper/std_inputstream.hxx"
  11
  12 using namespace std;
  13 using namespace com::sun::star;
  14
  15 namespace ucbhelper
  16 {
  17     StdInputStream::StdInputStream( boost::shared_ptr< istream > pStream ) :
  18         m_pStream( pStream ),
  19         m_nLength( 0 )
  20     {
  21         if ( m_pStream.get() )
  22         {
  23             streampos nInitPos = m_pStream->tellg( );
  24             m_pStream->seekg( 0, ios_base::end );
  25             streampos nEndPos = m_pStream->tellg( );
  26             m_pStream->seekg( nInitPos, ios_base::beg );
  27
  28             m_nLength = sal_Int64( nEndPos - nInitPos );
  29         }
  30     }
  31
  32     StdInputStream::~StdInputStream()
  33     {
  34     }
  35
  36     uno::Any SAL_CALL StdInputStream::queryInterface( const uno::Type& rType ) throw ( uno::RuntimeException )
  37     {
  38         uno::Any aRet = ::cppu::queryInterface( rType,
  39                                           ( static_cast< XInputStream* >( this ) ),
  40                                           ( static_cast< XSeekable* >( this ) ) );
  41
  42         return aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType );
  43     }
  44
  45     void SAL_CALL StdInputStream::acquire( ) throw( )
  46     {
  47         OWeakObject::acquire();
  48     }
  49
  50     void SAL_CALL StdInputStream::release( ) throw( )
  51     {
  52         OWeakObject::release();
  53     }
  54
  55     sal_Int32 SAL_CALL StdInputStream::readBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
  56         throw( io::NotConnectedException, io::BufferSizeExceededException,
  57                io::IOException, uno::RuntimeException)
  58     {
  59         osl::MutexGuard aGuard( m_aMutex );
  60
  61         if ( 0 <= nBytesToRead && aData.getLength() < nBytesToRead )
  62             aData.realloc( nBytesToRead );
  63
  64         if ( !m_pStream.get() )
  65             throw io::IOException( );
  66
  67         sal_Int32 nRead = 0;
  68         try
  69         {
  70             m_pStream->read( reinterpret_cast< char* >( aData.getArray( ) ), nBytesToRead );
  71             nRead = m_pStream->gcount();
  72         }
  73         catch ( const ios_base::failure& e )
  74         {
  75             SAL_INFO( "ucbhelper", "StdInputStream::readBytes() error: " << e.what() );
  76             throw io::IOException( );
  77         }
  78
  79         return nRead;
  80     }
  81
  82     sal_Int32 SAL_CALL StdInputStream::readSomeBytes( uno::Sequence< sal_Int8 >& aData,
  83             sal_Int32 nMaxBytesToRead )
  84         throw( io::NotConnectedException, io::BufferSizeExceededException,
  85                io::IOException, uno::RuntimeException)
  86     {
  87         osl::MutexGuard aGuard( m_aMutex );
  88
  89         if ( 0 <= nMaxBytesToRead && aData.getLength() < nMaxBytesToRead )
  90             aData.realloc( nMaxBytesToRead );
  91
  92         if ( !m_pStream.get() )
  93             throw io::IOException( );
  94
  95         sal_Int32 nRead = 0;
  96         try
  97         {
  98             nRead = m_pStream->readsome( reinterpret_cast< char* >( aData.getArray( ) ), nMaxBytesToRead );
  99         }
 100         catch ( const ios_base::failure& e )
 101         {
 102             SAL_INFO( "ucbhelper", "StdInputStream::readBytes() error: " << e.what() );
 103             throw io::IOException( );
 104         }
 105         return nRead;
 106     }
 107
 108     void SAL_CALL StdInputStream::skipBytes( sal_Int32 nBytesToSkip )
 109         throw( io::NotConnectedException, io::BufferSizeExceededException,
 110                io::IOException, uno::RuntimeException )
 111     {
 112         osl::MutexGuard aGuard( m_aMutex );
 113
 114         if ( !m_pStream.get() )
 115             throw io::IOException( );
 116
 117         try
 118         {
 119             m_pStream->seekg( nBytesToSkip, ios_base::cur );
 120         }
 121         catch ( const ios_base::failure& e )
 122         {
 123             SAL_INFO( "ucbhelper", "StdInputStream::readBytes() error: " << e.what() );
 124             throw io::IOException( );
 125         }
 126     }
 127
 128     sal_Int32 SAL_CALL StdInputStream::available( )
 129         throw(io::NotConnectedException, io::IOException, uno::RuntimeException )
 130     {
 131         return sal::static_int_cast< sal_Int32 >( m_nLength - getPosition() );
 132     }
 133
 134     void SAL_CALL StdInputStream::closeInput( )
 135         throw( io::NotConnectedException, io::IOException, uno::RuntimeException)
 136     {
 137         // No need to implement this for an istream
 138     }
 139
 140     void SAL_CALL StdInputStream::seek( sal_Int64 location )
 141         throw( lang::IllegalArgumentException, io::IOException, uno::RuntimeException )
 142     {
 143         osl::MutexGuard aGuard( m_aMutex );
 144
 145         if ( location < 0 || location > m_nLength )
 146             throw lang::IllegalArgumentException(
 147                     "Location can't be negative or greater than the length",
 148                     static_cast< cppu::OWeakObject* >( this ), 0 );
 149
 150         if ( !m_pStream.get() )
 151             throw io::IOException( );
 152
 153         try
 154         {
 155             m_pStream->clear( ); // may be needed to rewind the stream
 156             m_pStream->seekg( location, ios_base::beg );
 157         }
 158         catch ( const ios_base::failure& e )
 159         {
 160             SAL_INFO( "ucbhelper", "StdInputStream::readBytes() error: " << e.what() );
 161             throw io::IOException( );
 162         }
 163     }
 164
 165     sal_Int64 SAL_CALL StdInputStream::getPosition( )
 166         throw( io::IOException, uno::RuntimeException )
 167     {
 168         osl::MutexGuard aGuard( m_aMutex );
 169
 170         if ( !m_pStream.get() )
 171             throw io::IOException( );
 172
 173         sal_Int64 nPos = m_pStream->tellg( );
 174         if ( -1 == nPos )
 175             throw io::IOException( );
 176
 177         return nPos;
 178     }
 179
 180     sal_Int64 SAL_CALL StdInputStream::getLength( )
 181         throw ( io::IOException, uno::RuntimeException )
 182     {
 183         return m_nLength;
 184     }
 185 }
 186
 187 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */