188 lines
6.4 KiB
C++
188 lines
6.4 KiB
C++
/*************************************************************************
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* $RCSfile: MemoryByteGrabber.hxx,v $
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*
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* $Revision: 1.4 $
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*
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* last change: $Author: rt $ $Date: 2005-09-08 16:12:48 $
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*
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* The Contents of this file are made available subject to
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* the terms of GNU Lesser General Public License Version 2.1.
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*
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2005 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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************************************************************************/
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#ifndef _MEMORY_BYTE_GRABBER_HXX_
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#define _MEMORY_BYTE_GRABBER_HXX_
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#ifndef _COM_SUN_STAR_IO_XINPUTSTREAM_HPP_
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#include <com/sun/star/io/XInputStream.hpp>
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#endif
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#ifndef _COM_SUN_STAR_IO_XSEEKABLE_HPP_
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#include <com/sun/star/io/XSeekable.hpp>
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#endif
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class MemoryByteGrabber
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{
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protected:
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const com::sun::star::uno::Sequence < sal_Int8 > maBuffer;
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const sal_Int8 *mpBuffer;
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sal_Int32 mnCurrent, mnEnd;
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public:
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MemoryByteGrabber ( const com::sun::star::uno::Sequence < sal_Int8 > & rBuffer )
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: maBuffer ( rBuffer )
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, mnCurrent ( 0 )
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, mpBuffer ( rBuffer.getConstArray() )
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, mnEnd ( rBuffer.getLength() )
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{
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}
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MemoryByteGrabber()
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{
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}
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const sal_Int8 * getCurrentPos () { return mpBuffer + mnCurrent; }
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// XInputStream chained
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sal_Int32 SAL_CALL readBytes( com::sun::star::uno::Sequence< sal_Int8 >& aData,
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sal_Int32 nBytesToRead )
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throw(com::sun::star::io::NotConnectedException, com::sun::star::io::BufferSizeExceededException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
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{
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if ( nBytesToRead < 0)
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throw com::sun::star::io::BufferSizeExceededException();
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if (nBytesToRead + mnCurrent > mnEnd)
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nBytesToRead = mnEnd - mnCurrent;
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aData.realloc ( nBytesToRead );
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memcpy ( aData.getArray(), mpBuffer + mnCurrent, nBytesToRead );
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mnCurrent += nBytesToRead;
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return nBytesToRead;
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}
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sal_Int32 SAL_CALL readSomeBytes( com::sun::star::uno::Sequence< sal_Int8 >& aData,
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sal_Int32 nMaxBytesToRead )
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throw(com::sun::star::io::NotConnectedException, com::sun::star::io::BufferSizeExceededException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
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{
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return readBytes( aData, nMaxBytesToRead );
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}
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void SAL_CALL skipBytes( sal_Int32 nBytesToSkip )
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throw(com::sun::star::io::NotConnectedException, com::sun::star::io::BufferSizeExceededException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
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{
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mnCurrent += nBytesToSkip;
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}
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sal_Int32 SAL_CALL available( )
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throw(com::sun::star::io::NotConnectedException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
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{
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return mnEnd - mnCurrent;
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}
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void SAL_CALL closeInput( )
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throw(com::sun::star::io::NotConnectedException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
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{
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}
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// XSeekable chained...
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sal_Int64 SAL_CALL seek( sal_Int64 location )
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throw(com::sun::star::lang::IllegalArgumentException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
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{
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if ( location < 0 || location > mnEnd )
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throw com::sun::star::lang::IllegalArgumentException ();
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mnCurrent = static_cast < sal_Int32 > ( location );
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return mnCurrent;
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}
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sal_Int64 SAL_CALL getPosition( )
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throw(com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
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{
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return mnCurrent;
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}
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sal_Int64 SAL_CALL getLength( )
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throw(com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
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{
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return mnEnd;
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}
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MemoryByteGrabber& operator >> (sal_Int8& rInt8)
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{
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if (mnCurrent + 1 > mnEnd )
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rInt8 = 0;
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else
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rInt8 = mpBuffer [mnCurrent++] & 0xFF;
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return *this;
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}
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MemoryByteGrabber& operator >> (sal_Int16& rInt16)
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{
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if (mnCurrent + 2 > mnEnd )
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rInt16 = 0;
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else
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{
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rInt16 = mpBuffer[mnCurrent++] & 0xFF;
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rInt16 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
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}
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return *this;
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}
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MemoryByteGrabber& operator >> (sal_Int32& rInt32)
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{
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if (mnCurrent + 4 > mnEnd )
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rInt32 = 0;
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else
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{
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rInt32 = mpBuffer[mnCurrent++] & 0xFF;
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rInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
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rInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 16;
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rInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 24;
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}
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return *this;
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}
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MemoryByteGrabber& operator >> (sal_uInt8& rInt8)
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{
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if (mnCurrent + 1 > mnEnd )
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rInt8 = 0;
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else
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rInt8 = mpBuffer [mnCurrent++] & 0xFF;
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return *this;
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}
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MemoryByteGrabber& operator >> (sal_uInt16& rInt16)
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{
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if (mnCurrent + 2 > mnEnd )
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rInt16 = 0;
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else
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{
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rInt16 = mpBuffer [mnCurrent++] & 0xFF;
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rInt16 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 8;
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}
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return *this;
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}
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MemoryByteGrabber& operator >> (sal_uInt32& rInt32)
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{
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if (mnCurrent + 4 > mnEnd )
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rInt32 = 0;
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else
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{
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rInt32 = mpBuffer [mnCurrent++] & 0xFF;
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rInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 8;
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rInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 16;
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rInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 24;
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}
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return *this;
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}
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};
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#endif
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