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 <unotools/streamhelper.hxx>
  21
  22 namespace utl
  23 {
  24
  25 //------------------------------------------------------------------------------
  26 void SAL_CALL OInputStreamHelper::acquire() throw ()
  27 {
  28     InputStreamHelper_Base::acquire();
  29 }
  30
  31 //------------------------------------------------------------------------------
  32 void SAL_CALL OInputStreamHelper::release() throw ()
  33 {
  34     InputStreamHelper_Base::release();
  35 }
  36
  37 //------------------------------------------------------------------------------
  38 sal_Int32 SAL_CALL OInputStreamHelper::readBytes(staruno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead)
  39     throw(stario::NotConnectedException, stario::BufferSizeExceededException, stario::IOException, staruno::RuntimeException)
  40 {
  41     if (!m_xLockBytes.Is())
  42         throw stario::NotConnectedException(OUString(), static_cast<staruno::XWeak*>(this));
  43
  44     if (nBytesToRead < 0)
  45         throw stario::BufferSizeExceededException(OUString(), static_cast<staruno::XWeak*>(this));
  46
  47     ::osl::MutexGuard aGuard( m_aMutex );
  48     aData.realloc(nBytesToRead);
  49
  50     sal_Size nRead;
  51     ErrCode nError = m_xLockBytes->ReadAt(m_nActPos, (void*)aData.getArray(), nBytesToRead, &nRead);
  52     // FIXME  nRead could be truncated on 64-bit arches
  53     m_nActPos += (sal_uInt32)nRead;
  54
  55     if (nError != ERRCODE_NONE)
  56         throw stario::IOException(OUString(), static_cast<staruno::XWeak*>(this));
  57
  58     // adjust sequence if data read is lower than the desired data
  59     if (nRead < (sal_uInt32)nBytesToRead)
  60         aData.realloc( nRead );
  61
  62     return nRead;
  63 }
  64
  65 void SAL_CALL OInputStreamHelper::seek( sal_Int64 location ) throw(::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException)
  66 {
  67     ::osl::MutexGuard aGuard( m_aMutex );
  68     // cast is truncating, but position would be truncated as soon as
  69     // put into SvLockBytes anyway
  70     m_nActPos = sal::static_int_cast<sal_uInt32>(location);
  71 }
  72
  73 sal_Int64 SAL_CALL OInputStreamHelper::getPosition(  ) throw(::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException)
  74 {
  75     return m_nActPos;
  76 }
  77
  78 sal_Int64 SAL_CALL OInputStreamHelper::getLength(  ) throw(::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException)
  79 {
  80     if (!m_xLockBytes.Is())
  81         return 0;
  82
  83     ::osl::MutexGuard aGuard( m_aMutex );
  84     SvLockBytesStat aStat;
  85     m_xLockBytes->Stat( &aStat, SVSTATFLAG_DEFAULT );
  86     return aStat.nSize;
  87 }
  88
  89 //------------------------------------------------------------------------------
  90 sal_Int32 SAL_CALL OInputStreamHelper::readSomeBytes(staruno::Sequence< sal_Int8 >& aData,
  91                                                      sal_Int32 nMaxBytesToRead)
  92     throw (stario::NotConnectedException, stario::BufferSizeExceededException, stario::IOException, staruno::RuntimeException)
  93 {
  94     // read all data desired
  95     return readBytes(aData, nMaxBytesToRead);
  96 }
  97
  98 //------------------------------------------------------------------------------
  99 void SAL_CALL OInputStreamHelper::skipBytes(sal_Int32 nBytesToSkip)
 100     throw (stario::NotConnectedException, stario::BufferSizeExceededException, stario::IOException, staruno::RuntimeException)
 101 {
 102     ::osl::MutexGuard aGuard( m_aMutex );
 103     if (!m_xLockBytes.Is())
 104         throw stario::NotConnectedException(OUString(), static_cast<staruno::XWeak*>(this));
 105
 106     if (nBytesToSkip < 0)
 107         throw stario::BufferSizeExceededException(OUString(), static_cast<staruno::XWeak*>(this));
 108
 109     m_nActPos += nBytesToSkip;
 110 }
 111
 112 //------------------------------------------------------------------------------
 113 sal_Int32 SAL_CALL OInputStreamHelper::available()
 114     throw (stario::NotConnectedException, stario::IOException, staruno::RuntimeException)
 115 {
 116     ::osl::MutexGuard aGuard( m_aMutex );
 117     if (!m_xLockBytes.Is())
 118         throw stario::NotConnectedException(OUString(), static_cast<staruno::XWeak*>(this));
 119
 120     return m_nAvailable;
 121 }
 122
 123 //------------------------------------------------------------------------------
 124 void SAL_CALL OInputStreamHelper::closeInput()
 125     throw (stario::NotConnectedException, stario::IOException, staruno::RuntimeException)
 126 {
 127     ::osl::MutexGuard aGuard( m_aMutex );
 128     if (!m_xLockBytes.Is())
 129         throw stario::NotConnectedException(OUString(), static_cast<staruno::XWeak*>(this));
 130
 131     m_xLockBytes = NULL;
 132 }
 133
 134 } // namespace utl
 135
 136
 137 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */