unotools/source/streaming/streamhelper.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 <sal/config.h>
  21
  22 #include <com/sun/star/io/BufferSizeExceededException.hpp>
  23 #include <com/sun/star/io/IOException.hpp>
  24 #include <com/sun/star/io/NotConnectedException.hpp>
  25 #include <unotools/streamhelper.hxx>
  26
  27 namespace utl
  28 {
  29
  30 sal_Int32 SAL_CALL OInputStreamHelper::readBytes(css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead)
  31 {
  32     if (!m_xLockBytes.is())
  33         throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
  34
  35     if (nBytesToRead < 0)
  36         throw css::io::BufferSizeExceededException(OUString(), static_cast<css::uno::XWeak*>(this));
  37
  38     ::osl::MutexGuard aGuard( m_aMutex );
  39     if (aData.getLength() < nBytesToRead)
  40         aData.realloc(nBytesToRead);
  41
  42     std::size_t nRead(0);
  43     ErrCode nError = m_xLockBytes->ReadAt(m_nActPos, static_cast<void*>(aData.getArray()), nBytesToRead, &nRead);
  44     m_nActPos += nRead;
  45
  46     if (nError != ERRCODE_NONE)
  47         throw css::io::IOException(OUString(), static_cast<css::uno::XWeak*>(this));
  48
  49     // adjust sequence if data read is lower than the desired data
  50     if (nRead < static_cast<std::size_t>(aData.getLength()))
  51         aData.realloc( nRead );
  52
  53     return nRead;
  54 }
  55
  56 void SAL_CALL OInputStreamHelper::seek( sal_Int64 location )
  57 {
  58     ::osl::MutexGuard aGuard( m_aMutex );
  59     m_nActPos = location;
  60 }
  61
  62 sal_Int64 SAL_CALL OInputStreamHelper::getPosition(  )
  63 {
  64     return m_nActPos;
  65 }
  66
  67 sal_Int64 SAL_CALL OInputStreamHelper::getLength(  )
  68 {
  69     if (!m_xLockBytes.is())
  70         return 0;
  71
  72     ::osl::MutexGuard aGuard( m_aMutex );
  73     SvLockBytesStat aStat;
  74     m_xLockBytes->Stat( &aStat );
  75     return aStat.nSize;
  76 }
  77
  78 sal_Int32 SAL_CALL OInputStreamHelper::readSomeBytes(css::uno::Sequence< sal_Int8 >& aData,
  79                                                      sal_Int32 nMaxBytesToRead)
  80 {
  81     // read all data desired
  82     return readBytes(aData, nMaxBytesToRead);
  83 }
  84
  85 void SAL_CALL OInputStreamHelper::skipBytes(sal_Int32 nBytesToSkip)
  86 {
  87     ::osl::MutexGuard aGuard( m_aMutex );
  88     if (!m_xLockBytes.is())
  89         throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
  90
  91     if (nBytesToSkip < 0)
  92         throw css::io::BufferSizeExceededException(OUString(), static_cast<css::uno::XWeak*>(this));
  93
  94     m_nActPos += nBytesToSkip;
  95 }
  96
  97 sal_Int32 SAL_CALL OInputStreamHelper::available()
  98 {
  99     ::osl::MutexGuard aGuard( m_aMutex );
 100     if (!m_xLockBytes.is())
 101         throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
 102
 103     return m_nAvailable;
 104 }
 105
 106 void SAL_CALL OInputStreamHelper::closeInput()
 107 {
 108     ::osl::MutexGuard aGuard( m_aMutex );
 109     if (!m_xLockBytes.is())
 110         throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
 111
 112     m_xLockBytes = nullptr;
 113 }
 114
 115 } // namespace utl
 116
 117 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */