ucb/source/ucp/file/filrec.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
  21 #include "filrec.hxx"
  22
  23 namespace fileaccess {
  24
  25 void ReconnectingFile::disconnect()
  26 {
  27     m_aFile.close();
  28     m_bDisconnect = true;
  29 }
  30
  31 bool ReconnectingFile::reconnect()
  32 {
  33     bool bResult = false;
  34     if ( m_bFlagsSet )
  35     {
  36         disconnect();
  37         if ( m_aFile.open( m_nFlags ) == ::osl::FileBase::E_None
  38           || m_aFile.open( osl_File_OpenFlag_Read ) == ::osl::FileBase::E_None )
  39         {
  40             m_bDisconnect = false;
  41             bResult = true;
  42         }
  43     }
  44
  45     return bResult;
  46 }
  47
  48 ::osl::FileBase::RC ReconnectingFile::open( sal_uInt32 uFlags )
  49 {
  50     ::osl::FileBase::RC nResult = m_aFile.open( uFlags );
  51     if ( nResult == ::osl::FileBase::E_None )
  52     {
  53         if ( uFlags & osl_File_OpenFlag_Create )
  54             m_nFlags = (uFlags & ( ~osl_File_OpenFlag_Create )) | osl_File_OpenFlag_Write;
  55         else
  56             m_nFlags = uFlags;
  57
  58         m_bFlagsSet = true;
  59     }
  60
  61     return nResult;
  62 }
  63
  64 ::osl::FileBase::RC ReconnectingFile::close()
  65 {
  66     m_nFlags = 0;
  67     m_bFlagsSet = false;
  68     m_bDisconnect = false;
  69
  70     return m_aFile.close();
  71 }
  72
  73 ::osl::FileBase::RC ReconnectingFile::setPos( sal_uInt32 uHow, sal_Int64 uPos )
  74 {
  75     ::osl::FileBase::RC nRes = ::osl::FileBase::E_NETWORK;
  76
  77     if ( uHow == osl_Pos_Absolut && uPos > 0 )
  78     {
  79         if ( m_bDisconnect )
  80         {
  81             if ( reconnect() )
  82                 nRes = m_aFile.setPos( uHow, uPos );
  83         }
  84         else
  85         {
  86             // E_INVAL error code means in this case that
  87             // the file handler is invalid
  88             nRes = m_aFile.setPos( uHow, uPos );
  89             if ( ( nRes == ::osl::FileBase::E_NETWORK
  90                 || nRes == ::osl::FileBase::E_INVAL )
  91               && reconnect() )
  92                 nRes = m_aFile.setPos( uHow, uPos );
  93         }
  94     }
  95     else
  96     {
  97         if ( !m_bDisconnect )
  98             nRes = m_aFile.setPos( uHow, uPos );
  99     }
 100
 101     return nRes;
 102 }
 103
 104 ::osl::FileBase::RC ReconnectingFile::getPos( sal_uInt64& uPos )
 105 {
 106     if ( m_bDisconnect )
 107         return ::osl::FileBase::E_NETWORK;
 108
 109     return m_aFile.getPos( uPos );
 110 }
 111
 112 ::osl::FileBase::RC ReconnectingFile::setSize( sal_uInt64 uSize )
 113 {
 114     ::osl::FileBase::RC nRes = ::osl::FileBase::E_NETWORK;
 115
 116     if ( uSize == 0 )
 117     {
 118         if ( m_bDisconnect )
 119         {
 120             if ( reconnect() )
 121                 nRes = m_aFile.setSize( uSize );
 122         }
 123         else
 124         {
 125             // E_INVAL error code means in this case that
 126             // the file handler is invalid
 127             nRes = m_aFile.setSize( uSize );
 128             if ( ( nRes == ::osl::FileBase::E_NETWORK
 129                 || nRes == ::osl::FileBase::E_INVAL )
 130               && reconnect() )
 131                 nRes = m_aFile.setSize( uSize );
 132         }
 133     }
 134     else
 135     {
 136         if ( !m_bDisconnect )
 137             nRes = m_aFile.setSize( uSize );
 138     }
 139
 140     return nRes;
 141 }
 142
 143 ::osl::FileBase::RC ReconnectingFile::getSize( sal_uInt64 &rSize )
 144 {
 145     ::osl::FileBase::RC nRes = ::osl::FileBase::E_NETWORK;
 146
 147     if ( !m_bDisconnect )
 148         nRes = m_aFile.getSize( rSize );
 149
 150     // E_INVAL error code means in this case that
 151     // the file handler is invalid
 152     if ( ( nRes == ::osl::FileBase::E_NETWORK
 153         || nRes == ::osl::FileBase::E_INVAL )
 154       && reconnect() )
 155     {
 156         nRes = m_aFile.getSize( rSize );
 157
 158         // the repairing should be disconnected, since the position might be wrong
 159         // but the result should be retrieved
 160         disconnect();
 161     }
 162
 163     return nRes;
 164 }
 165
 166 ::osl::FileBase::RC ReconnectingFile::read( void *pBuffer, sal_uInt64 uBytesRequested, sal_uInt64& rBytesRead )
 167 {
 168     if ( m_bDisconnect )
 169         return ::osl::FileBase::E_NETWORK;
 170
 171     return m_aFile.read( pBuffer, uBytesRequested, rBytesRead );
 172 }
 173
 174 ::osl::FileBase::RC ReconnectingFile::write(const void *pBuffer, sal_uInt64 uBytesToWrite, sal_uInt64& rBytesWritten)
 175 {
 176     if ( m_bDisconnect )
 177         return ::osl::FileBase::E_NETWORK;
 178
 179     return m_aFile.write( pBuffer, uBytesToWrite, rBytesWritten );
 180 }
 181
 182 ::osl::FileBase::RC ReconnectingFile::sync() const
 183 {
 184     if ( m_bDisconnect )
 185         return ::osl::FileBase::E_NETWORK;
 186
 187     return m_aFile.sync();
 188 }
 189
 190 } // namespace fileaccess
 191
 192 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */