Line data    Source code

       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             : #ifndef _MEMORY_BYTE_GRABBER_HXX_
      20             : #define _MEMORY_BYTE_GRABBER_HXX_
      21             : 
      22             : #include <com/sun/star/io/XInputStream.hpp>
      23             : #include <com/sun/star/io/XSeekable.hpp>
      24             : #include <string.h>
      25             : 
      26        5719 : class MemoryByteGrabber
      27             : {
      28             : protected:
      29             :     const com::sun::star::uno::Sequence < sal_Int8 > maBuffer;
      30             :     const sal_Int8 *mpBuffer;
      31             :     sal_Int32 mnCurrent, mnEnd;
      32             : public:
      33        5719 :     MemoryByteGrabber ( const com::sun::star::uno::Sequence < sal_Int8 > & rBuffer )
      34             :     : maBuffer ( rBuffer )
      35        5719 :     , mpBuffer ( rBuffer.getConstArray() )
      36             :     , mnCurrent ( 0 )
      37       11438 :     , mnEnd ( rBuffer.getLength() )
      38             :     {
      39        5719 :     }
      40             :     MemoryByteGrabber()
      41             :     {
      42             :     }
      43      353940 :     const sal_Int8 * getCurrentPos () { return mpBuffer + mnCurrent; }
      44             : 
      45             :     // XInputStream chained
      46             :     sal_Int32 SAL_CALL readBytes( com::sun::star::uno::Sequence< sal_Int8 >& aData,
      47             :                                             sal_Int32 nBytesToRead )
      48             :         throw(com::sun::star::io::NotConnectedException, com::sun::star::io::BufferSizeExceededException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
      49             :     {
      50             :         if ( nBytesToRead < 0)
      51             :             throw com::sun::star::io::BufferSizeExceededException();
      52             : 
      53             :         if (nBytesToRead + mnCurrent > mnEnd)
      54             :             nBytesToRead = mnEnd - mnCurrent;
      55             : 
      56             :         aData.realloc ( nBytesToRead );
      57             :         memcpy( aData.getArray(), mpBuffer + mnCurrent, nBytesToRead );
      58             :         mnCurrent += nBytesToRead;
      59             :         return nBytesToRead;
      60             :     }
      61             : 
      62             :     sal_Int32 SAL_CALL readSomeBytes( com::sun::star::uno::Sequence< sal_Int8 >& aData,
      63             :                                                     sal_Int32 nMaxBytesToRead )
      64             :         throw(com::sun::star::io::NotConnectedException, com::sun::star::io::BufferSizeExceededException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
      65             :     {
      66             :         return readBytes( aData, nMaxBytesToRead );
      67             :     }
      68     1061820 :     void SAL_CALL skipBytes( sal_Int32 nBytesToSkip )
      69             :         throw(com::sun::star::io::NotConnectedException, com::sun::star::io::BufferSizeExceededException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
      70             :     {
      71     1061820 :         mnCurrent += nBytesToSkip;
      72     1061820 :     }
      73             :     sal_Int32 SAL_CALL available(  )
      74             :         throw(com::sun::star::io::NotConnectedException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
      75             :     {
      76             :         return mnEnd - mnCurrent;
      77             :     }
      78             :     void SAL_CALL closeInput(  )
      79             :         throw(com::sun::star::io::NotConnectedException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
      80             :     {
      81             :     }
      82             : 
      83             :     // XSeekable chained...
      84             :     sal_Int64 SAL_CALL seek( sal_Int64 location )
      85             :         throw(com::sun::star::lang::IllegalArgumentException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
      86             :     {
      87             :         if ( location < 0 || location > mnEnd )
      88             :             throw com::sun::star::lang::IllegalArgumentException ();
      89             :         mnCurrent = static_cast < sal_Int32 > ( location );
      90             :         return mnCurrent;
      91             :     }
      92             :     sal_Int64 SAL_CALL getPosition(  )
      93             :             throw(com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
      94             :     {
      95             :         return mnCurrent;
      96             :     }
      97             :     sal_Int64 SAL_CALL getLength(  )
      98             :             throw(com::sun::star::io::IOException, com::sun::star::uno::RuntimeException)
      99             :     {
     100             :         return mnEnd;
     101             :     }
     102             :     MemoryByteGrabber& operator >> (sal_Int8& rInt8)
     103             :     {
     104             :         if (mnCurrent + 1 > mnEnd )
     105             :             rInt8 = 0;
     106             :         else
     107             :             rInt8 = mpBuffer [mnCurrent++] & 0xFF;
     108             :         return *this;
     109             :     }
     110     2123640 :     MemoryByteGrabber& operator >> (sal_Int16& rInt16)
     111             :     {
     112     2123640 :         if (mnCurrent + 2 > mnEnd )
     113           0 :             rInt16 = 0;
     114             :         else
     115             :         {
     116     2123640 :             rInt16  =   mpBuffer[mnCurrent++] & 0xFF;
     117     2123640 :             rInt16 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
     118             :         }
     119     2123640 :         return *this;
     120             :     }
     121     1061820 :     MemoryByteGrabber& operator >> (sal_Int32& rInt32)
     122             :     {
     123     1061820 :         if (mnCurrent + 4 > mnEnd )
     124           0 :             rInt32 = 0;
     125             :         else
     126             :         {
     127     1061820 :             rInt32  =   mpBuffer[mnCurrent++] & 0xFF;
     128     1061820 :             rInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
     129     1061820 :             rInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 16;
     130     1061820 :             rInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 24;
     131             :         }
     132     1061820 :         return *this;
     133             :     }
     134             : 
     135             :     MemoryByteGrabber& operator >> (sal_uInt8& rInt8)
     136             :     {
     137             :         if (mnCurrent + 1 > mnEnd )
     138             :             rInt8 = 0;
     139             :         else
     140             :             rInt8 = mpBuffer [mnCurrent++] & 0xFF;
     141             :         return *this;
     142             :     }
     143             :     MemoryByteGrabber& operator >> (sal_uInt16& rInt16)
     144             :     {
     145             :         if (mnCurrent + 2 > mnEnd )
     146             :             rInt16 = 0;
     147             :         else
     148             :         {
     149             :             rInt16  =   mpBuffer [mnCurrent++] & 0xFF;
     150             :             rInt16 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 8;
     151             :         }
     152             :         return *this;
     153             :     }
     154     1061820 :     MemoryByteGrabber& operator >> (sal_uInt32& rInt32)
     155             :     {
     156     1061820 :         if (mnCurrent + 4 > mnEnd )
     157           0 :             rInt32 = 0;
     158             :         else
     159             :         {
     160     1061820 :             rInt32  =   mpBuffer [mnCurrent++] & 0xFF;
     161     1061820 :             rInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 8;
     162     1061820 :             rInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 16;
     163     1061820 :             rInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 24;
     164             :         }
     165     1061820 :         return *this;
     166             :     }
     167             : };
     168             : 
     169             : #endif
     170             : 
     171             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */