ucb/source/ucp/gio/gio_seekable.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  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <com/sun/star/ucb/InteractiveAugmentedIOException.hpp>
  21 #include <ucbhelper/cancelcommandexecution.hxx>
  22 #include <string.h>
  23
  24 #include "gio_seekable.hxx"
  25 #include "gio_content.hxx"
  26
  27 using namespace com::sun::star;
  28
  29 namespace gio
  30 {
  31
  32 Seekable::Seekable(GSeekable *pStream) : mpStream(pStream)
  33 {
  34     if (!mpStream)
  35         throw io::NotConnectedException();
  36 }
  37
  38 Seekable::~Seekable()
  39 {
  40 }
  41
  42 void SAL_CALL Seekable::truncate()
  43     throw( io::IOException, uno::RuntimeException, std::exception )
  44 {
  45     if (!mpStream)
  46         throw io::NotConnectedException();
  47
  48     if (!g_seekable_can_truncate(mpStream))
  49         throw io::IOException("Truncate unsupported",
  50             static_cast< cppu::OWeakObject * >(this));
  51
  52     GError *pError=NULL;
  53     if (!g_seekable_truncate(mpStream, 0, NULL, &pError))
  54         convertToIOException(pError, static_cast< cppu::OWeakObject * >(this));
  55 }
  56
  57 void SAL_CALL Seekable::seek( sal_Int64 location )
  58     throw( lang::IllegalArgumentException, io::IOException, uno::RuntimeException, std::exception )
  59 {
  60     if (!mpStream)
  61         throw io::NotConnectedException();
  62
  63     if (!g_seekable_can_seek(mpStream))
  64         throw io::IOException("Seek unsupported",
  65             static_cast< cppu::OWeakObject * >(this));
  66
  67     GError *pError=NULL;
  68     if (!g_seekable_seek(mpStream, location, G_SEEK_SET, NULL, &pError))
  69         convertToIOException(pError, static_cast< cppu::OWeakObject * >(this));
  70 }
  71
  72 sal_Int64 SAL_CALL Seekable::getPosition() throw( io::IOException, uno::RuntimeException, std::exception )
  73 {
  74     if (!mpStream)
  75         throw io::NotConnectedException();
  76
  77     return g_seekable_tell(mpStream);
  78 }
  79
  80 sal_Int64 SAL_CALL Seekable::getLength() throw( io::IOException, uno::RuntimeException, std::exception )
  81 {
  82     if (!mpStream)
  83         throw io::NotConnectedException();
  84
  85     bool bOk = false;
  86     sal_uInt64 nSize = 0;
  87
  88     GFileInfo* pInfo = G_IS_FILE_INPUT_STREAM(mpStream)
  89         ? g_file_input_stream_query_info(G_FILE_INPUT_STREAM(mpStream), G_FILE_ATTRIBUTE_STANDARD_SIZE, NULL, NULL)
  90         : g_file_output_stream_query_info(G_FILE_OUTPUT_STREAM(mpStream), G_FILE_ATTRIBUTE_STANDARD_SIZE, NULL, NULL);
  91
  92     if (pInfo)
  93     {
  94         if (g_file_info_has_attribute(pInfo, G_FILE_ATTRIBUTE_STANDARD_SIZE))
  95         {
  96             nSize = g_file_info_get_size(pInfo);
  97             bOk = true;
  98         }
  99         g_object_unref(pInfo);
 100     }
 101
 102     if (!bOk)
 103     {
 104         GError *pError=NULL;
 105         sal_Int64 nCurr = getPosition();
 106         if (!g_seekable_seek(mpStream, 0, G_SEEK_END, NULL, &pError))
 107             convertToIOException(pError, static_cast< cppu::OWeakObject * >(this));
 108         nSize = getPosition();
 109         seek(nCurr);
 110         bOk = true;
 111     }
 112
 113     return nSize;
 114 }
 115
 116 uno::Any Seekable::queryInterface( const uno::Type &type ) throw( uno::RuntimeException, std::exception )
 117 {
 118     uno::Any aRet = ::cppu::queryInterface ( type,
 119         static_cast< XSeekable * >( this ) );
 120
 121     if (!aRet.hasValue() && g_seekable_can_truncate(mpStream))
 122         aRet = ::cppu::queryInterface ( type, static_cast< XTruncate * >( this ) );
 123
 124     return aRet.hasValue() ? aRet : OWeakObject::queryInterface( type );
 125 }
 126
 127 }
 128
 129 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */