comphelper/source/streaming/oslfile2streamwrap.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/NotConnectedException.hpp>
  24 #include <comphelper/oslfile2streamwrap.hxx>
  25 #include <o3tl/safeint.hxx>
  26 #include <osl/file.hxx>
  27
  28 #include <algorithm>
  29
  30 namespace comphelper
  31 {
  32     using namespace osl;
  33
  34
  35 OSLInputStreamWrapper::OSLInputStreamWrapper( File& _rFile )
  36     : m_pFile(&_rFile)
  37 {
  38 }
  39
  40
  41 OSLInputStreamWrapper::~OSLInputStreamWrapper()
  42 {
  43 }
  44
  45
  46 sal_Int32 SAL_CALL OSLInputStreamWrapper::readBytes(css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead)
  47 {
  48     if (!m_pFile)
  49         throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
  50
  51     if (nBytesToRead < 0)
  52         throw css::io::BufferSizeExceededException(OUString(),static_cast<css::uno::XWeak*>(this));
  53
  54     aData.realloc(nBytesToRead);
  55
  56     std::scoped_lock aGuard( m_aMutex );
  57
  58     sal_uInt64 nRead = 0;
  59     FileBase::RC eError = m_pFile->read(static_cast<void*>(aData.getArray()), nBytesToRead, nRead);
  60     if (eError != FileBase::E_None)
  61         throw css::io::BufferSizeExceededException(OUString(),static_cast<css::uno::XWeak*>(this));
  62
  63     // If the read character < MaxLength, adjust css::uno::Sequence
  64     if (nRead < o3tl::make_unsigned(nBytesToRead))
  65         aData.realloc( sal::static_int_cast< sal_Int32 >(nRead) );
  66
  67     return sal::static_int_cast< sal_Int32 >(nRead);
  68 }
  69
  70 sal_Int32 SAL_CALL OSLInputStreamWrapper::readSomeBytes(css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead)
  71 {
  72     if (!m_pFile)
  73         throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
  74
  75     if (nMaxBytesToRead < 0)
  76         throw css::io::BufferSizeExceededException(OUString(),static_cast<css::uno::XWeak*>(this));
  77
  78     return readBytes(aData, nMaxBytesToRead);
  79 }
  80
  81 void SAL_CALL OSLInputStreamWrapper::skipBytes(sal_Int32 nBytesToSkip)
  82 {
  83     std::scoped_lock aGuard( m_aMutex );
  84     if (!m_pFile)
  85         throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
  86
  87     sal_uInt64 nCurrentPos;
  88     FileBase::RC eError = m_pFile->getPos(nCurrentPos);
  89     if (eError != FileBase::E_None)
  90         throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
  91
  92     sal_uInt64 nNewPos = nCurrentPos + nBytesToSkip;
  93     eError = m_pFile->setPos(osl_Pos_Absolut, nNewPos);
  94     if (eError != FileBase::E_None)
  95         throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
  96 }
  97
  98 sal_Int32 SAL_CALL OSLInputStreamWrapper::available()
  99 {
 100     std::scoped_lock aGuard( m_aMutex );
 101     if (!m_pFile)
 102         throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
 103
 104     sal_uInt64 nPos;
 105     FileBase::RC eError = m_pFile->getPos(nPos);
 106     if (eError != FileBase::E_None)
 107         throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
 108
 109     eError = m_pFile->setPos(osl_Pos_End, 0);
 110     if (eError != FileBase::E_None)
 111        throw css::io::NotConnectedException(OUString(),static_cast<css::uno::XWeak*>(this));
 112
 113     sal_uInt64 nAvailable;
 114     eError = m_pFile->getPos(nAvailable);
 115     if (eError != FileBase::E_None)
 116        throw css::io::NotConnectedException(OUString(),static_cast<css::uno::XWeak*>(this));
 117
 118     nAvailable = nAvailable - nPos;
 119     eError = m_pFile->setPos(osl_Pos_Absolut, nPos);
 120     if (eError != FileBase::E_None)
 121        throw css::io::NotConnectedException(OUString(),static_cast<css::uno::XWeak*>(this));
 122     return std::min<sal_Int64>(nAvailable, SAL_MAX_INT32);
 123 }
 124
 125
 126 void SAL_CALL OSLInputStreamWrapper::closeInput()
 127 {
 128     if (!m_pFile)
 129         throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
 130
 131     m_pFile->close();
 132
 133     m_pFile = nullptr;
 134 }
 135
 136 /*************************************************************************/
 137 // css::io::XOutputStream
 138
 139
 140 OSLOutputStreamWrapper::OSLOutputStreamWrapper(osl::File & _rFile):
 141     rFile(_rFile)
 142 {}
 143
 144 OSLOutputStreamWrapper::~OSLOutputStreamWrapper() {}
 145
 146 void SAL_CALL OSLOutputStreamWrapper::writeBytes(const css::uno::Sequence< sal_Int8 >& aData)
 147 {
 148     sal_uInt64 nWritten;
 149     FileBase::RC eError = rFile.write(aData.getConstArray(),aData.getLength(), nWritten);
 150     if (eError != FileBase::E_None
 151         || nWritten != sal::static_int_cast< sal_uInt32 >(aData.getLength()))
 152     {
 153         throw css::io::BufferSizeExceededException(OUString(),static_cast<css::uno::XWeak*>(this));
 154     }
 155 }
 156
 157
 158 void SAL_CALL OSLOutputStreamWrapper::flush()
 159 {
 160 }
 161
 162
 163 void SAL_CALL OSLOutputStreamWrapper::closeOutput()
 164 {
 165     rFile.close();
 166 }
 167
 168 } // namespace comphelper
 169
 170
 171 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */