/*************************************************************************
 *
 *  $RCSfile: unomemorystream.cxx,v $
 *
 *  $Revision: 1.2 $
 *
 *  last change: $Author: hjs $ $Date: 2000-11-03 17:30:14 $
 *
 *  The Contents of this file are made available subject to the terms of
 *  either of the following licenses
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 *         - GNU Lesser General Public License Version 2.1
 *         - Sun Industry Standards Source License Version 1.1
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 *  Sun Microsystems Inc., October, 2000
 *
 *  GNU Lesser General Public License Version 2.1
 *  =============================================
 *  Copyright 2000 by Sun Microsystems, Inc.
 *  901 San Antonio Road, Palo Alto, CA 94303, USA
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 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
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 *  except in compliance with the License. You may obtain a copy of the
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#include <toolkit/helper/unomemorystream.hxx>
#include <algorithm>

//  ----------------------------------------------------
//  class UnoMemoryStream
//  ----------------------------------------------------
UnoMemoryStream::UnoMemoryStream( sal_uInt32 nInitSize, sal_uInt32 nResize )
    : SvMemoryStream( nInitSize, nResize )
{
}

// ::com::sun::star::uno::XInterface
::com::sun::star::uno::Any UnoMemoryStream::queryInterface( const ::com::sun::star::uno::Type & rType ) throw(::com::sun::star::uno::RuntimeException)
{
    ::com::sun::star::uno::Any aRet = ::cppu::queryInterface( rType,
                                        SAL_STATIC_CAST( ::com::sun::star::io::XInputStream*, this ) );
    return (aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType ));
}


// ::com::sun::star::io::XInputStream
sal_Int32 UnoMemoryStream::readBytes( ::com::sun::star::uno::Sequence< sal_Int8 >& rData, sal_Int32 nBytesToRead ) throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException)
{
    ::osl::Guard< ::osl::Mutex > aGuard( GetMutex() );

    sal_Int32 nRead = available();
    if ( nRead > nBytesToRead )
        nRead = nBytesToRead;

    rData = ::com::sun::star::uno::Sequence< sal_Int8 >( nRead );
    Read( rData.getArray(), nRead );

    return nRead;
}

sal_Int32 UnoMemoryStream::readSomeBytes( ::com::sun::star::uno::Sequence< sal_Int8 >& rData, sal_Int32 nMaxBytesToRead ) throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException)
{
    ::osl::Guard< ::osl::Mutex > aGuard( GetMutex() );

    sal_Int32 nAvailable = available();
    if( nAvailable )
    {
        return readBytes( rData, std::min( nMaxBytesToRead , nAvailable ) );
    }
    else
    {
        // Not the most effective method, but it sticks to the specification
        return readBytes( rData, 1 );
    }
}

void UnoMemoryStream::skipBytes( sal_Int32 nBytesToSkip ) throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException)
{
    ::osl::Guard< ::osl::Mutex > aGuard( GetMutex() );

    SeekRel( nBytesToSkip );
}

sal_Int32 UnoMemoryStream::available() throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException)
{
    ::osl::Guard< ::osl::Mutex > aGuard( GetMutex() );

    sal_uInt32 nPos = Tell();
    sal_uInt32 nEnd = Seek( STREAM_SEEK_TO_END );
    Seek( nPos );
    return nEnd - nPos;
}

void UnoMemoryStream::closeInput() throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException)
{
    // nothing to do
}