Line data    Source code

       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 <ByteGrabber.hxx>
      21             : #include <com/sun/star/io/XSeekable.hpp>
      22             : #include <com/sun/star/io/XInputStream.hpp>
      23             : 
      24             : using namespace ::com::sun::star;
      25             : 
      26             : #if OSL_DEBUG_LEVEL > 0
      27             : #define THROW_WHERE SAL_WHERE
      28             : #else
      29             : #define THROW_WHERE ""
      30             : #endif
      31             : 
      32             : /** ByteGrabber implements the >> operators on an XOutputStream. This is
      33             :  *  potentially quite slow and may need to be optimised
      34             :  */
      35             : 
      36       18260 : ByteGrabber::ByteGrabber(uno::Reference  < io::XInputStream > xIstream)
      37             : : xStream(xIstream)
      38             : , xSeek (xIstream, uno::UNO_QUERY )
      39       18260 : , aSequence ( 4 )
      40             : {
      41       18260 :     pSequence = aSequence.getArray();
      42       18260 : }
      43             : 
      44       18240 : ByteGrabber::~ByteGrabber()
      45             : {
      46       18240 : }
      47             : 
      48          36 : void ByteGrabber::setInputStream (uno::Reference < io::XInputStream > xNewStream)
      49             : {
      50          36 :     ::osl::MutexGuard aGuard( m_aMutex );
      51          36 :     xStream = xNewStream;
      52          36 :     xSeek = uno::Reference < io::XSeekable > (xNewStream, uno::UNO_QUERY);
      53          36 : }
      54             : 
      55             : // XInputStream chained
      56       83734 : sal_Int32 SAL_CALL ByteGrabber::readBytes( uno::Sequence< sal_Int8 >& aData,
      57             :                                         sal_Int32 nBytesToRead )
      58             :     throw(io::NotConnectedException, io::BufferSizeExceededException, io::IOException, uno::RuntimeException)
      59             : {
      60       83734 :     ::osl::MutexGuard aGuard( m_aMutex );
      61       83734 :     return xStream->readBytes(aData, nBytesToRead );
      62             : }
      63             : 
      64             : // XSeekable chained...
      65       95802 : sal_Int64 SAL_CALL ByteGrabber::seek( sal_Int64 location )
      66             :     throw(lang::IllegalArgumentException, io::IOException, uno::RuntimeException)
      67             : {
      68       95802 :     ::osl::MutexGuard aGuard( m_aMutex );
      69       95802 :     if (xSeek.is() )
      70             :     {
      71       95802 :         sal_Int64 nLen = xSeek->getLength();
      72       95802 :         if ( location < 0 || location > nLen )
      73           0 :             throw lang::IllegalArgumentException(THROW_WHERE, uno::Reference< uno::XInterface >(), 1 );
      74       95802 :         if (location > nLen )
      75           0 :             location = nLen;
      76       95802 :         xSeek->seek( location );
      77      191604 :         return location;
      78             :     }
      79             :     else
      80       95802 :         throw io::IOException(THROW_WHERE );
      81             : }
      82             : 
      83      108406 : sal_Int64 SAL_CALL ByteGrabber::getPosition(  )
      84             :         throw(io::IOException, uno::RuntimeException)
      85             : {
      86      108406 :     ::osl::MutexGuard aGuard( m_aMutex );
      87      108406 :     if (xSeek.is() )
      88      216812 :         return xSeek->getPosition();
      89             :     else
      90      108406 :         throw io::IOException(THROW_WHERE );
      91             : }
      92             : 
      93       71667 : sal_Int64 SAL_CALL ByteGrabber::getLength(  )
      94             :         throw(io::IOException, uno::RuntimeException)
      95             : {
      96       71667 :     ::osl::MutexGuard aGuard( m_aMutex );
      97       71667 :     if (xSeek.is() )
      98      143334 :         return xSeek->getLength();
      99             :     else
     100       71667 :         throw io::IOException(THROW_WHERE );
     101             : }
     102             : 
     103      283083 : sal_uInt16 ByteGrabber::ReadUInt16()
     104             : {
     105      283083 :     ::osl::MutexGuard aGuard( m_aMutex );
     106             : 
     107      283083 :     if (xStream->readBytes(aSequence, 2) != 2)
     108           0 :         return 0;
     109             : 
     110      283083 :     pSequence = aSequence.getConstArray();
     111             :     return static_cast <sal_uInt16>
     112      283083 :            ( (pSequence[0] & 0xFF)
     113      283083 :           | (pSequence[1] & 0xFF) << 8);
     114             : }
     115             : 
     116      295151 : sal_uInt32 ByteGrabber::ReadUInt32()
     117             : {
     118      295151 :     ::osl::MutexGuard aGuard( m_aMutex );
     119             : 
     120      295151 :     if (xStream->readBytes(aSequence, 4) != 4)
     121           0 :         return 0;
     122             : 
     123      295151 :     pSequence = aSequence.getConstArray();
     124             :     return static_cast < sal_uInt32 >
     125      295151 :             ( (pSequence[0] & 0xFF)
     126      295151 :           | ( pSequence[1] & 0xFF ) << 8
     127      295151 :           | ( pSequence[2] & 0xFF ) << 16
     128      295151 :           | ( pSequence[3] & 0xFF ) << 24 );
     129             : }
     130             : 
     131             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */