package/source/zipapi/ByteGrabber.cxx

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  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_package.hxx"
  33 #include <ByteGrabber.hxx>
  34 #include <com/sun/star/io/XSeekable.hpp>
  35 #include <com/sun/star/io/XInputStream.hpp>
  36
  37 using namespace ::com::sun::star;
  38
  39 /** ByteGrabber implements the >> operators on an XOutputStream. This is
  40  *  potentially quite slow and may need to be optimised
  41  */
  42
  43 ByteGrabber::ByteGrabber(uno::Reference  < io::XInputStream > xIstream)
  44 : xStream(xIstream)
  45 , xSeek (xIstream, uno::UNO_QUERY )
  46 , aSequence ( 4 )
  47 {
  48     pSequence = aSequence.getArray();
  49 }
  50
  51 ByteGrabber::~ByteGrabber()
  52 {
  53 }
  54 void ByteGrabber::setInputStream (uno::Reference < io::XInputStream > xNewStream)
  55 {
  56     xStream = xNewStream;
  57     xSeek = uno::Reference < io::XSeekable > (xNewStream, uno::UNO_QUERY);
  58 }
  59
  60 // XInputStream chained
  61 sal_Int32 SAL_CALL ByteGrabber::readBytes( uno::Sequence< sal_Int8 >& aData,
  62                                         sal_Int32 nBytesToRead )
  63     throw(io::NotConnectedException, io::BufferSizeExceededException, io::IOException, uno::RuntimeException)
  64 {
  65     return xStream->readBytes(aData, nBytesToRead );
  66 }
  67
  68 // XSeekable chained...
  69 sal_Int64 SAL_CALL ByteGrabber::seek( sal_Int64 location )
  70     throw(lang::IllegalArgumentException, io::IOException, uno::RuntimeException)
  71 {
  72     if (xSeek.is() )
  73     {
  74         sal_Int64 nLen = xSeek->getLength();
  75         if ( location < 0 || location > nLen )
  76             throw lang::IllegalArgumentException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >(), 1 );
  77         if (location > nLen )
  78             location = nLen;
  79         xSeek->seek( location );
  80         return location;
  81     }
  82     else
  83         throw io::IOException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >() );
  84 }
  85 sal_Int64 SAL_CALL ByteGrabber::getPosition(  )
  86         throw(io::IOException, uno::RuntimeException)
  87 {
  88     if (xSeek.is() )
  89         return xSeek->getPosition();
  90     else
  91         throw io::IOException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >() );
  92 }
  93 sal_Int64 SAL_CALL ByteGrabber::getLength(  )
  94         throw(io::IOException, uno::RuntimeException)
  95 {
  96     if (xSeek.is() )
  97         return xSeek->getLength();
  98     else
  99         throw io::IOException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >() );
 100 }
 101 ByteGrabber& ByteGrabber::operator >> (sal_Int8& rInt8)
 102 {
 103     if (xStream->readBytes(aSequence,1) != 1)
 104         rInt8 = 0;
 105     else
 106         rInt8 = aSequence[0] & 0xFF;
 107     return *this;
 108 }
 109 ByteGrabber& ByteGrabber::operator >> (sal_Int16& rInt16)
 110 {
 111     if (xStream->readBytes ( aSequence, 2) != 2)
 112         rInt16 = 0;
 113     else
 114     {
 115         pSequence = aSequence.getConstArray();
 116         rInt16 = static_cast <sal_Int16>
 117                ( (pSequence[0] & 0xFF)
 118               | (pSequence[1] & 0xFF) << 8);
 119     }
 120     return *this;
 121 }
 122 ByteGrabber& ByteGrabber::operator >> (sal_Int32& rInt32)
 123 {
 124     if (xStream->readBytes(aSequence, 4) != 4)
 125         rInt32 = 0;
 126     else
 127     {
 128         pSequence = aSequence.getConstArray();
 129         rInt32 = static_cast < sal_Int32 >
 130                 ( (pSequence[0] & 0xFF)
 131               | ( pSequence[1] & 0xFF ) << 8
 132               | ( pSequence[2] & 0xFF ) << 16
 133               | ( pSequence[3] & 0xFF ) << 24 );
 134     }
 135     return *this;
 136 }
 137
 138 ByteGrabber& ByteGrabber::operator >> (sal_uInt8& rInt8)
 139 {
 140     if (xStream->readBytes(aSequence,1) != 1)
 141         rInt8 = 0;
 142     else
 143         rInt8 = static_cast < sal_uInt8 > (aSequence[0] & 0xFF );
 144     return *this;
 145 }
 146 ByteGrabber& ByteGrabber::operator >> (sal_uInt16& rInt16)
 147 {
 148     if (xStream->readBytes(aSequence, 2) != 2)
 149         rInt16 = 0;
 150     else
 151     {
 152         pSequence = aSequence.getConstArray();
 153         rInt16 = static_cast <sal_uInt16>
 154                ( (pSequence[0] & 0xFF)
 155               | (pSequence[1] & 0xFF) << 8);
 156     }
 157     return *this;
 158 }
 159 ByteGrabber& ByteGrabber::operator >> (sal_uInt32& ruInt32)
 160 {
 161     if (xStream->readBytes(aSequence, 4) != 4)
 162         ruInt32 = 0;
 163     else
 164     {
 165         pSequence = aSequence.getConstArray();
 166         ruInt32 = static_cast < sal_uInt32 >
 167                 ( (pSequence[0] & 0xFF)
 168               | ( pSequence[1] & 0xFF ) << 8
 169               | ( pSequence[2] & 0xFF ) << 16
 170               | ( pSequence[3] & 0xFF ) << 24 );
 171     }
 172     return *this;
 173 }