AOO410/main/ucb/source/ucp/gio/gio_seekable.cxx

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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
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 * software distributed under the License is distributed on an
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#include <rtl/memory.h>
#include <com/sun/star/ucb/InteractiveAugmentedIOException.hpp>
#include <ucbhelper/cancelcommandexecution.hxx>
#include <string.h>

#include "gio_seekable.hxx"
#include "gio_content.hxx"

using namespace com::sun::star;

namespace gio
{

Seekable::Seekable(GSeekable *pStream) : mpStream(pStream)
{
    if (!mpStream)
        throw io::NotConnectedException();
}

Seekable::~Seekable( void )
{
}

void SAL_CALL Seekable::truncate( void )
    throw( io::IOException, uno::RuntimeException )
{
    if (!mpStream)
        throw io::NotConnectedException();

    if (!g_seekable_can_truncate(mpStream))
        throw io::IOException(rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("Truncate unsupported")),
            static_cast< cppu::OWeakObject * >(this));
    
    GError *pError=NULL;
    if (!g_seekable_truncate(mpStream, 0, NULL, &pError))
        convertToException(pError, static_cast< cppu::OWeakObject * >(this));
}

void SAL_CALL Seekable::seek( sal_Int64 location )
    throw( lang::IllegalArgumentException, io::IOException, uno::RuntimeException )
{
    if (!mpStream)
        throw io::NotConnectedException();

    if (!g_seekable_can_seek(mpStream))
        throw io::IOException(rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("Seek unsupported")),
            static_cast< cppu::OWeakObject * >(this));

    GError *pError=NULL;
    if (!g_seekable_seek(mpStream, location, G_SEEK_SET, NULL, &pError))
        convertToException(pError, static_cast< cppu::OWeakObject * >(this));
}

sal_Int64 SAL_CALL Seekable::getPosition() throw( io::IOException, uno::RuntimeException )
{
    if (!mpStream)
        throw io::NotConnectedException();

    return g_seekable_tell(mpStream);
}

sal_Int64 SAL_CALL Seekable::getLength() throw( io::IOException, uno::RuntimeException )
{
    if (!mpStream)
        throw io::NotConnectedException();

    bool bOk = false;
    sal_uInt64 nSize = 0;

    GFileInfo* pInfo = G_IS_FILE_INPUT_STREAM(mpStream) 
        ? g_file_input_stream_query_info(G_FILE_INPUT_STREAM(mpStream), const_cast<char*>(G_FILE_ATTRIBUTE_STANDARD_SIZE), NULL, NULL) 
        : g_file_output_stream_query_info(G_FILE_OUTPUT_STREAM(mpStream), const_cast<char*>(G_FILE_ATTRIBUTE_STANDARD_SIZE), NULL, NULL);

    if (pInfo)
    {
        if (g_file_info_has_attribute(pInfo, G_FILE_ATTRIBUTE_STANDARD_SIZE))
        {
            nSize = g_file_info_get_size(pInfo);
            bOk = true;
        }
        g_object_unref(pInfo);
    }

    if (!bOk)
    {
        GError *pError=NULL;
        sal_Int64 nCurr = getPosition();
        if (!g_seekable_seek(mpStream, 0, G_SEEK_END, NULL, &pError))
            convertToException(pError, static_cast< cppu::OWeakObject * >(this));
        nSize = getPosition();
        seek(nCurr);
        bOk = true;
    }

    if (!bOk)
        throw io::IOException(rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("Getting size unsupported")),
            static_cast< cppu::OWeakObject * >(this));

    return nSize;
}

uno::Any Seekable::queryInterface( const uno::Type &type ) throw( uno::RuntimeException )
{
    uno::Any aRet = ::cppu::queryInterface ( type,
        static_cast< XSeekable * >( this ) );

    if (!aRet.hasValue() && g_seekable_can_truncate(mpStream))
        aRet = ::cppu::queryInterface ( type, static_cast< XTruncate * >( this ) );

    return aRet.hasValue() ? aRet : OWeakObject::queryInterface( type );
}

}