package/source/zipapi/ByteGrabber.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 <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 /** ByteGrabber implements the >> operators on an XOutputStream. This is
  27  *  potentially quite slow and may need to be optimised
  28  */
  29
  30 ByteGrabber::ByteGrabber(uno::Reference  < io::XInputStream > xIstream)
  31 : xStream(xIstream)
  32 , xSeek (xIstream, uno::UNO_QUERY )
  33 , aSequence ( 4 )
  34 {
  35     pSequence = aSequence.getArray();
  36 }
  37
  38 ByteGrabber::~ByteGrabber()
  39 {
  40 }
  41
  42 void ByteGrabber::setInputStream (uno::Reference < io::XInputStream > xNewStream)
  43 {
  44     ::osl::MutexGuard aGuard( m_aMutex );
  45     xStream = xNewStream;
  46     xSeek = uno::Reference < io::XSeekable > (xNewStream, uno::UNO_QUERY);
  47 }
  48
  49 // XInputStream chained
  50 sal_Int32 SAL_CALL ByteGrabber::readBytes( uno::Sequence< sal_Int8 >& aData,
  51                                         sal_Int32 nBytesToRead )
  52     throw(io::NotConnectedException, io::BufferSizeExceededException, io::IOException, uno::RuntimeException)
  53 {
  54     ::osl::MutexGuard aGuard( m_aMutex );
  55     return xStream->readBytes(aData, nBytesToRead );
  56 }
  57
  58 // XSeekable chained...
  59 sal_Int64 SAL_CALL ByteGrabber::seek( sal_Int64 location )
  60     throw(lang::IllegalArgumentException, io::IOException, uno::RuntimeException)
  61 {
  62     ::osl::MutexGuard aGuard( m_aMutex );
  63     if (xSeek.is() )
  64     {
  65         sal_Int64 nLen = xSeek->getLength();
  66         if ( location < 0 || location > nLen )
  67             throw lang::IllegalArgumentException(OSL_LOG_PREFIX, uno::Reference< uno::XInterface >(), 1 );
  68         if (location > nLen )
  69             location = nLen;
  70         xSeek->seek( location );
  71         return location;
  72     }
  73     else
  74         throw io::IOException(OSL_LOG_PREFIX, uno::Reference< uno::XInterface >() );
  75 }
  76
  77 sal_Int64 SAL_CALL ByteGrabber::getPosition(  )
  78         throw(io::IOException, uno::RuntimeException)
  79 {
  80     ::osl::MutexGuard aGuard( m_aMutex );
  81     if (xSeek.is() )
  82         return xSeek->getPosition();
  83     else
  84         throw io::IOException(OSL_LOG_PREFIX, uno::Reference< uno::XInterface >() );
  85 }
  86
  87 sal_Int64 SAL_CALL ByteGrabber::getLength(  )
  88         throw(io::IOException, uno::RuntimeException)
  89 {
  90     ::osl::MutexGuard aGuard( m_aMutex );
  91     if (xSeek.is() )
  92         return xSeek->getLength();
  93     else
  94         throw io::IOException(OSL_LOG_PREFIX, uno::Reference< uno::XInterface >() );
  95 }
  96
  97 ByteGrabber& ByteGrabber::operator >> (sal_Int8& rInt8)
  98 {
  99     ::osl::MutexGuard aGuard( m_aMutex );
 100     if (xStream->readBytes(aSequence,1) != 1)
 101         rInt8 = 0;
 102     else
 103         rInt8 = aSequence[0] & 0xFF;
 104     return *this;
 105 }
 106
 107 ByteGrabber& ByteGrabber::operator >> (sal_Int16& rInt16)
 108 {
 109     ::osl::MutexGuard aGuard( m_aMutex );
 110     if (xStream->readBytes ( aSequence, 2) != 2)
 111         rInt16 = 0;
 112     else
 113     {
 114         pSequence = aSequence.getConstArray();
 115         rInt16 = static_cast <sal_Int16>
 116                ( (pSequence[0] & 0xFF)
 117               | (pSequence[1] & 0xFF) << 8);
 118     }
 119     return *this;
 120 }
 121
 122 ByteGrabber& ByteGrabber::operator >> (sal_Int32& rInt32)
 123 {
 124     ::osl::MutexGuard aGuard( m_aMutex );
 125
 126     if (xStream->readBytes(aSequence, 4) != 4)
 127         rInt32 = 0;
 128     else
 129     {
 130         pSequence = aSequence.getConstArray();
 131         rInt32 = static_cast < sal_Int32 >
 132                 ( (pSequence[0] & 0xFF)
 133               | ( pSequence[1] & 0xFF ) << 8
 134               | ( pSequence[2] & 0xFF ) << 16
 135               | ( pSequence[3] & 0xFF ) << 24 );
 136     }
 137     return *this;
 138 }
 139
 140 ByteGrabber& ByteGrabber::operator >> (sal_uInt8& rInt8)
 141 {
 142     ::osl::MutexGuard aGuard( m_aMutex );
 143
 144     if (xStream->readBytes(aSequence,1) != 1)
 145         rInt8 = 0;
 146     else
 147         rInt8 = static_cast < sal_uInt8 > (aSequence[0] & 0xFF );
 148     return *this;
 149 }
 150 ByteGrabber& ByteGrabber::operator >> (sal_uInt16& rInt16)
 151 {
 152     ::osl::MutexGuard aGuard( m_aMutex );
 153
 154     if (xStream->readBytes(aSequence, 2) != 2)
 155         rInt16 = 0;
 156     else
 157     {
 158         pSequence = aSequence.getConstArray();
 159         rInt16 = static_cast <sal_uInt16>
 160                ( (pSequence[0] & 0xFF)
 161               | (pSequence[1] & 0xFF) << 8);
 162     }
 163     return *this;
 164 }
 165 ByteGrabber& ByteGrabber::operator >> (sal_uInt32& ruInt32)
 166 {
 167     ::osl::MutexGuard aGuard( m_aMutex );
 168
 169     if (xStream->readBytes(aSequence, 4) != 4)
 170         ruInt32 = 0;
 171     else
 172     {
 173         pSequence = aSequence.getConstArray();
 174         ruInt32 = static_cast < sal_uInt32 >
 175                 ( (pSequence[0] & 0xFF)
 176               | ( pSequence[1] & 0xFF ) << 8
 177               | ( pSequence[2] & 0xFF ) << 16
 178               | ( pSequence[3] & 0xFF ) << 24 );
 179     }
 180     return *this;
 181 }
 182
 183 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */