wrapstreamforshare.cxx

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#include <sal/config.h>
#include <sal/log.hxx>
 
#include <com/sun/star/io/IOException.hpp>
#include <utility>
#include <osl/diagnose.h>
 
#include "wrapstreamforshare.hxx"
 
using namespace ::com::sun::star;
 
#if OSL_DEBUG_LEVEL > 0
#define THROW_WHERE SAL_WHERE
#else
#define THROW_WHERE ""
#endif
 
WrapStreamForShare::WrapStreamForShare( uno::Reference< io::XInputStream > xInStream,
                                        rtl::Reference< comphelper::RefCountedMutex > xMutexRef )
: m_xMutex(std::move( xMutexRef ))
, m_xInStream(std::move( xInStream ))
, m_nCurPos( 0 )
{
    if ( !m_xMutex.is() || !m_xInStream.is() )
    {
        OSL_FAIL( "Wrong initialization of wrapping stream!" );
        throw uno::RuntimeException(THROW_WHERE );
    }
    m_xSeekable.set( m_xInStream, uno::UNO_QUERY_THROW );
}
 
WrapStreamForShare::~WrapStreamForShare()
{
}
 
// XInputStream
sal_Int32 SAL_CALL WrapStreamForShare::readBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
{
    if ( !m_xInStream.is() )
        throw io::IOException(THROW_WHERE );
 
    m_xSeekable->seek( m_nCurPos );
 
    sal_Int32 nRead = m_xInStream->readBytes( aData, nBytesToRead );
    m_nCurPos += nRead;
 
    return nRead;
}
 
sal_Int32 SAL_CALL WrapStreamForShare::readSomeBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
{
    if ( !m_xInStream.is() )
        throw io::IOException(THROW_WHERE );
 
    m_xSeekable->seek( m_nCurPos );
 
    sal_Int32 nRead = m_xInStream->readSomeBytes( aData, nMaxBytesToRead );
    m_nCurPos += nRead;
 
    return nRead;
}
 
void SAL_CALL WrapStreamForShare::skipBytes( sal_Int32 nBytesToSkip )
{
    ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 
    if ( !m_xInStream.is() )
        throw io::IOException(THROW_WHERE );
 
    m_xSeekable->seek( m_nCurPos );
 
    m_xInStream->skipBytes( nBytesToSkip );
    m_nCurPos = m_xSeekable->getPosition();
}
 
sal_Int32 SAL_CALL WrapStreamForShare::available()
{
    ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 
    if ( !m_xInStream.is() )
        throw io::IOException(THROW_WHERE );
 
    return m_xInStream->available();
}
 
void SAL_CALL WrapStreamForShare::closeInput()
{
    ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 
    if ( !m_xInStream.is() )
        throw io::IOException(THROW_WHERE );
 
    // the package is the owner so it will close the stream
    // m_xInStream->closeInput();
    m_xInStream.clear();
    m_xSeekable.clear();
}
 
// XSeekable
void SAL_CALL WrapStreamForShare::seek( sal_Int64 location )
{
    ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 
    if ( !m_xInStream.is() )
        throw io::IOException(THROW_WHERE );
 
    // let stream implementation do all the checking
    m_xSeekable->seek( location );
 
    m_nCurPos = m_xSeekable->getPosition();
}
 
sal_Int64 SAL_CALL WrapStreamForShare::getPosition()
{
    ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 
    if ( !m_xInStream.is() )
        throw io::IOException(THROW_WHERE );
 
    return m_nCurPos;
}
 
sal_Int64 SAL_CALL WrapStreamForShare::getLength()
{
    ::osl::MutexGuard aGuard( m_xMutex->GetMutex() );
 
    if ( !m_xInStream.is() )
        throw io::IOException(THROW_WHERE );
 
    return m_xSeekable->getLength();
}
 
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