ucb/source/ucp/gvfs/gvfs_stream.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 "gvfs_stream.hxx"
  21 #include <com/sun/star/ucb/InteractiveAugmentedIOException.hpp>
  22
  23 #include <libgnomevfs/gnome-vfs-ops.h>
  24
  25 using namespace cppu;
  26 using namespace com::sun::star::io;
  27 using namespace com::sun::star::uno;
  28 using namespace com::sun::star::ucb;
  29 using namespace gvfs;
  30
  31
  32 Stream::Stream( GnomeVFSHandle         *handle,
  33         const GnomeVFSFileInfo *aInfo ) :
  34     m_eof (sal_False),
  35     m_bInputStreamCalled( sal_False ),
  36     m_bOutputStreamCalled( sal_False )
  37 {
  38     m_handle = handle;
  39     gnome_vfs_file_info_copy (&m_info, aInfo);
  40 }
  41
  42 Stream::~Stream( void )
  43 {
  44     if (m_handle) {
  45         gnome_vfs_close (m_handle);
  46         m_handle = NULL;
  47     }
  48 }
  49
  50 Any Stream::queryInterface( const Type &type )
  51     throw( RuntimeException )
  52 {
  53     Any aRet = ::cppu::queryInterface
  54         ( type,
  55           static_cast< XStream * >( this ),
  56           static_cast< XInputStream * >( this ),
  57           static_cast< XOutputStream * >( this ),
  58           static_cast< XSeekable * >( this ),
  59           static_cast< XTruncate * >( this ) );
  60
  61     return aRet.hasValue() ? aRet : OWeakObject::queryInterface( type );
  62 }
  63
  64 // -------------------------------------------------------------------
  65 //                            XStream
  66 // -------------------------------------------------------------------
  67
  68 com::sun::star::uno::Reference< com::sun::star::io::XInputStream > SAL_CALL
  69 Stream::getInputStream(  )
  70     throw( com::sun::star::uno::RuntimeException )
  71 {
  72     {
  73         osl::MutexGuard aGuard( m_aMutex );
  74         m_bInputStreamCalled = true;
  75     }
  76     return Reference< XInputStream >( this );
  77 }
  78
  79 com::sun::star::uno::Reference< com::sun::star::io::XOutputStream > SAL_CALL
  80 Stream::getOutputStream(  )
  81     throw( com::sun::star::uno::RuntimeException )
  82 {
  83     {
  84         osl::MutexGuard aGuard( m_aMutex );
  85         m_bOutputStreamCalled = true;
  86     }
  87     return Reference< XOutputStream >( this );
  88 }
  89
  90 // -------------------------------------------------------------------
  91 //                            XInputStream
  92 // -------------------------------------------------------------------
  93
  94 sal_Int32 SAL_CALL Stream::readBytes(
  95     Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
  96         throw( NotConnectedException,
  97                BufferSizeExceededException,
  98                IOException,
  99                RuntimeException )
 100 {
 101     GnomeVFSResult   result;
 102     GnomeVFSFileSize nBytesRead = 0;
 103
 104     if( ! m_handle )
 105         throw IOException();
 106
 107     if( m_eof ) {
 108         aData.realloc( 0 );
 109         return 0;
 110     }
 111
 112     try {
 113         aData.realloc( nBytesToRead );
 114     } catch ( const Exception &e ) {
 115         throw BufferSizeExceededException();
 116     }
 117
 118     do {
 119         result = gnome_vfs_read( m_handle, aData.getArray(),
 120                      nBytesToRead, &nBytesRead );
 121     } while( result == GNOME_VFS_ERROR_INTERRUPTED );
 122
 123     if (result != GNOME_VFS_OK &&
 124         result != GNOME_VFS_ERROR_EOF)
 125         throwOnError( result );
 126
 127     if (result == GNOME_VFS_ERROR_EOF)
 128         m_eof = sal_True;
 129
 130     aData.realloc( sal::static_int_cast<sal_uInt32>(nBytesRead) );
 131
 132     return sal::static_int_cast<sal_Int32>(nBytesRead);
 133 }
 134
 135 sal_Int32 SAL_CALL Stream::readSomeBytes(
 136     Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
 137             throw( NotConnectedException,
 138                BufferSizeExceededException,
 139                IOException,
 140                RuntimeException )
 141 {
 142     // Again - having 2 methods here just sucks; cf. filinpstr.cxx
 143     // This can never be an effective non-blocking API - so why bother ?
 144     return readBytes( aData, nMaxBytesToRead );
 145 }
 146
 147 void SAL_CALL Stream::skipBytes( sal_Int32 nBytesToSkip )
 148         throw( NotConnectedException,
 149                BufferSizeExceededException,
 150                IOException,
 151                RuntimeException )
 152 {
 153     GnomeVFSResult result;
 154
 155     if( ! m_handle )
 156         throw IOException();
 157
 158     result = gnome_vfs_seek( m_handle, GNOME_VFS_SEEK_CURRENT, nBytesToSkip );
 159
 160     if ( result == GNOME_VFS_ERROR_BAD_PARAMETERS ||
 161          result == GNOME_VFS_ERROR_NOT_SUPPORTED )
 162         g_warning ("FIXME: just read them in ...");
 163
 164     throwOnError( result );
 165 }
 166
 167 sal_Int32 SAL_CALL Stream::available(  )
 168         throw( NotConnectedException,
 169                IOException,
 170                RuntimeException )
 171 {
 172     return 0; // cf. filinpstr.cxx
 173 }
 174
 175 void SAL_CALL Stream::closeInput( void )
 176         throw( NotConnectedException,
 177                    IOException,
 178                    RuntimeException )
 179 {
 180     osl::MutexGuard aGuard( m_aMutex );
 181     m_bInputStreamCalled = false;
 182
 183     if( ! m_bOutputStreamCalled )
 184         closeStream();
 185 }
 186
 187 // -------------------------------------------------------------------
 188 //                            XSeekable
 189 // -------------------------------------------------------------------
 190
 191 void SAL_CALL Stream::seek( sal_Int64 location )
 192         throw( ::com::sun::star::lang::IllegalArgumentException,
 193                IOException,
 194                RuntimeException )
 195 {
 196     GnomeVFSResult result;
 197
 198     if( ! m_handle )
 199         throw IOException();
 200
 201     if ( location < 0 )
 202         throw ::com::sun::star::lang::IllegalArgumentException();
 203
 204     m_eof = sal_False;
 205     result = gnome_vfs_seek( m_handle, GNOME_VFS_SEEK_START, location );
 206
 207     if (result == GNOME_VFS_ERROR_EOF)
 208         throw ::com::sun::star::lang::IllegalArgumentException();
 209
 210     throwOnError( result );
 211 }
 212
 213 sal_Int64 SAL_CALL Stream::getPosition()
 214         throw( IOException,
 215                RuntimeException )
 216 {
 217     GnomeVFSFileSize nBytesIn = 0;
 218
 219     if( ! m_handle )
 220         throw IOException();
 221
 222     throwOnError( gnome_vfs_tell( m_handle, &nBytesIn ) );
 223
 224     return nBytesIn;
 225 }
 226
 227 sal_Int64 SAL_CALL Stream::getLength()
 228     throw( IOException, RuntimeException )
 229 {
 230     // FIXME: so this sucks; it may be stale but ...
 231     if (m_info.valid_fields & GNOME_VFS_FILE_INFO_FIELDS_SIZE)
 232         return m_info.size;
 233     else {
 234         g_warning ("FIXME: No valid length");
 235         return 0;
 236     }
 237 }
 238
 239 // -------------------------------------------------------------------
 240 //                            XTruncate
 241 // -------------------------------------------------------------------
 242
 243 void SAL_CALL Stream::truncate( void )
 244     throw( com::sun::star::io::IOException,
 245            com::sun::star::uno::RuntimeException )
 246 {
 247     if( ! m_handle )
 248         throw IOException();
 249
 250     throwOnError( gnome_vfs_truncate_handle( m_handle, 0 ) );
 251 }
 252
 253 // -------------------------------------------------------------------
 254 //                            XOutputStream
 255 // -------------------------------------------------------------------
 256
 257 void SAL_CALL Stream::writeBytes( const com::sun::star::uno::Sequence< sal_Int8 >& aData )
 258     throw( com::sun::star::io::NotConnectedException,
 259            com::sun::star::io::BufferSizeExceededException,
 260            com::sun::star::io::IOException,
 261            com::sun::star::uno::RuntimeException)
 262 {
 263     GnomeVFSResult   result = GNOME_VFS_OK;
 264     GnomeVFSFileSize toWrite = aData.getLength();
 265     const sal_Int8 *p = aData.getConstArray();
 266
 267     if( ! m_handle )
 268         throw IOException();
 269
 270     while( toWrite > 0) {
 271         GnomeVFSFileSize bytesWritten = 0;
 272
 273         result = gnome_vfs_write( m_handle, p, toWrite, &bytesWritten );
 274         if( result == GNOME_VFS_ERROR_INTERRUPTED )
 275             continue;
 276         throwOnError( result );
 277         g_assert( bytesWritten <= toWrite );
 278         toWrite -= bytesWritten;
 279         p += bytesWritten;
 280     }
 281 }
 282
 283 void SAL_CALL Stream::flush( void )
 284     throw( NotConnectedException, BufferSizeExceededException,
 285            IOException, RuntimeException )
 286 {
 287 }
 288
 289 void SAL_CALL Stream::closeOutput( void )
 290     throw( com::sun::star::io::NotConnectedException,
 291            com::sun::star::io::IOException,
 292            com::sun::star::uno::RuntimeException )
 293 {
 294     osl::MutexGuard aGuard( m_aMutex );
 295     m_bOutputStreamCalled = false;
 296
 297     if( ! m_bInputStreamCalled )
 298         closeStream();
 299 }
 300
 301 // -------------------------------------------------------------------
 302 //                            Misc.
 303 // -------------------------------------------------------------------
 304
 305 void Stream::closeStream( void )
 306     throw( ::com::sun::star::io::NotConnectedException,
 307            ::com::sun::star::io::IOException,
 308            ::com::sun::star::uno::RuntimeException )
 309 {
 310     if (m_handle) {
 311         gnome_vfs_close (m_handle);
 312         m_handle = NULL;
 313     } else
 314         throw IOException();
 315 }
 316
 317 void Stream::throwOnError( GnomeVFSResult result )
 318     throw( NotConnectedException,
 319            BufferSizeExceededException,
 320            IOException,
 321            RuntimeException )
 322 {
 323     if( result != GNOME_VFS_OK ) {
 324         OUString aMsg = OUString::createFromAscii
 325               ( gnome_vfs_result_to_string( result ) );
 326
 327         g_warning( "Input Stream exceptional result '%s' (%d)",
 328                gnome_vfs_result_to_string( result ), result );
 329
 330         throw IOException( aMsg, static_cast< cppu::OWeakObject * >( this ) );
 331     }
 332 }
 333
 334 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */