ucb/source/ucp/file/filinpstr.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/IOException.hpp>
  23 #include <com/sun/star/lang/IllegalArgumentException.hpp>
  24
  25 #include "filinpstr.hxx"
  26 #include "filerror.hxx"
  27
  28 using namespace fileaccess;
  29 using namespace com::sun::star;
  30
  31 #if OSL_DEBUG_LEVEL > 0
  32 #define THROW_WHERE SAL_WHERE
  33 #else
  34 #define THROW_WHERE ""
  35 #endif
  36
  37 XInputStream_impl::XInputStream_impl( const OUString& aUncPath, bool bLock )
  38     : m_aFile( aUncPath ),
  39       m_nErrorCode( TASKHANDLER_NO_ERROR ),
  40       m_nMinorErrorCode( TASKHANDLER_NO_ERROR )
  41 {
  42     sal_uInt32 nFlags = osl_File_OpenFlag_Read;
  43     if ( !bLock )
  44         nFlags |= osl_File_OpenFlag_NoLock;
  45
  46     osl::FileBase::RC err = m_aFile.open( nFlags );
  47     if( err != osl::FileBase::E_None )
  48     {
  49         m_nIsOpen = false;
  50         m_aFile.close();
  51
  52         m_nErrorCode = TASKHANDLING_OPEN_FOR_INPUTSTREAM;
  53         m_nMinorErrorCode = err;
  54     }
  55     else
  56         m_nIsOpen = true;
  57 }
  58
  59
  60 XInputStream_impl::~XInputStream_impl()
  61 {
  62     try
  63     {
  64         closeInput();
  65     }
  66     catch (io::IOException const &)
  67     {
  68         OSL_FAIL("unexpected situation");
  69     }
  70     catch (uno::RuntimeException const &)
  71     {
  72         OSL_FAIL("unexpected situation");
  73     }
  74 }
  75
  76 sal_Int32 SAL_CALL
  77 XInputStream_impl::readBytes(
  78                  uno::Sequence< sal_Int8 >& aData,
  79                  sal_Int32 nBytesToRead )
  80 {
  81     if( ! m_nIsOpen ) throw io::IOException( THROW_WHERE );
  82
  83     aData.realloc(nBytesToRead);
  84         //TODO! translate memory exhaustion (if it were detectable...) into
  85         // io::BufferSizeExceededException
  86
  87     sal_uInt64 nrc(0);
  88     if(m_aFile.read( aData.getArray(),sal_uInt64(nBytesToRead),nrc )
  89        != osl::FileBase::E_None)
  90         throw io::IOException( THROW_WHERE );
  91
  92     // Shrink aData in case we read less than nBytesToRead (XInputStream
  93     // documentation does not tell whether this is required, and I do not know
  94     // if any code relies on this, so be conservative---SB):
  95     if (sal::static_int_cast<sal_Int32>(nrc) != nBytesToRead)
  96         aData.realloc(sal_Int32(nrc));
  97     return static_cast<sal_Int32>(nrc);
  98 }
  99
 100 sal_Int32 SAL_CALL
 101 XInputStream_impl::readSomeBytes(
 102     uno::Sequence< sal_Int8 >& aData,
 103     sal_Int32 nMaxBytesToRead )
 104 {
 105     return readBytes( aData,nMaxBytesToRead );
 106 }
 107
 108
 109 void SAL_CALL
 110 XInputStream_impl::skipBytes( sal_Int32 nBytesToSkip )
 111 {
 112     m_aFile.setPos( osl_Pos_Current, sal_uInt64( nBytesToSkip ) );
 113 }
 114
 115
 116 sal_Int32 SAL_CALL
 117 XInputStream_impl::available()
 118 {
 119     sal_Int64 avail = getLength() - getPosition();
 120     return std::min<sal_Int64>(avail, SAL_MAX_INT32);
 121 }
 122
 123
 124 void SAL_CALL
 125 XInputStream_impl::closeInput()
 126 {
 127     if( m_nIsOpen )
 128     {
 129         osl::FileBase::RC err = m_aFile.close();
 130         if( err != osl::FileBase::E_None )
 131             throw io::IOException( THROW_WHERE );
 132         m_nIsOpen = false;
 133     }
 134 }
 135
 136
 137 void SAL_CALL
 138 XInputStream_impl::seek( sal_Int64 location )
 139 {
 140     if( location < 0 )
 141         throw lang::IllegalArgumentException( THROW_WHERE, uno::Reference< uno::XInterface >(), 0 );
 142     if( osl::FileBase::E_None != m_aFile.setPos( osl_Pos_Absolut, sal_uInt64( location ) ) )
 143         throw io::IOException( THROW_WHERE );
 144 }
 145
 146
 147 sal_Int64 SAL_CALL
 148 XInputStream_impl::getPosition()
 149 {
 150     sal_uInt64 uPos;
 151     if( osl::FileBase::E_None != m_aFile.getPos( uPos ) )
 152         throw io::IOException( THROW_WHERE );
 153     return sal_Int64( uPos );
 154 }
 155
 156 sal_Int64 SAL_CALL
 157 XInputStream_impl::getLength()
 158 {
 159     sal_uInt64 uEndPos;
 160     if ( m_aFile.getSize(uEndPos) != osl::FileBase::E_None )
 161         throw io::IOException( THROW_WHERE );
 162     return sal_Int64( uEndPos );
 163 }
 164
 165 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */