lotuswordpro/source/filter/benval.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*************************************************************************
   3  *
   4  *  The Contents of this file are made available subject to the terms of
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   7  *         - GNU Lesser General Public License Version 2.1
   8  *         - Sun Industry Standards Source License Version 1.1
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  10  *  Sun Microsystems Inc., October, 2000
  11  *
  12  *  GNU Lesser General Public License Version 2.1
  13  *  =============================================
  14  *  Copyright 2000 by Sun Microsystems, Inc.
  15  *  901 San Antonio Road, Palo Alto, CA 94303, USA
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  17  *  This library is free software; you can redistribute it and/or
  18  *  modify it under the terms of the GNU Lesser General Public
  19  *  License version 2.1, as published by the Free Software Foundation.
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  21  *  This library is distributed in the hope that it will be useful,
  22  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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  24  *  Lesser General Public License for more details.
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  31  *
  32  *  Sun Industry Standards Source License Version 1.1
  33  *  =================================================
  34  *  The contents of this file are subject to the Sun Industry Standards
  35  *  Source License Version 1.1 (the "License"); You may not use this file
  36  *  except in compliance with the License. You may obtain a copy of the
  37  *  License at http://www.openoffice.org/license.html.
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  46  *  The Initial Developer of the Original Code is: IBM Corporation
  47  *
  48  *  Copyright: 2008 by IBM Corporation
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  52  *  Contributor(s): _______________________________________
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  55  ************************************************************************/
  56
  57 #include <sal/config.h>
  58
  59 #include <algorithm>
  60 #include <cstring>
  61
  62 #include "bento.hxx"
  63
  64 namespace OpenStormBento
  65 {
  66
  67 size_t
  68 CBenValue::GetValueSize()
  69 {
  70     size_t Size = 0;
  71     CBenValueSegment * pCurr = nullptr;
  72     while ((pCurr = GetNextValueSegment(pCurr)) != nullptr)
  73         Size += pCurr->GetSize();
  74     return Size;
  75 }
  76
  77 void
  78 CBenValue::ReadValueData(void * pReadBuffer, size_t Offset,
  79   size_t Amt, size_t* pAmtRead)
  80 {
  81     size_t SegOffset = 0;
  82     *pAmtRead = 0;
  83     CBenValueSegment * pCurrSeg = nullptr;
  84     LtcBenContainer * pContainer = GetProperty()->GetContainer();
  85     BenByte* pBuffer = static_cast<BenByte*>(pReadBuffer);
  86
  87     /// pReadBuffer -- pointer to buffer of read result, allocated outside this function
  88     /// Offset          -- read buffer's start offset address, relative value in the whole value stream
  89     /// Amt             -- read buffer's size
  90     /// pAmtRead    -- return the actual read size
  91
  92     /// SegOffset     -- current segment's start address offset, relative value in the whole value stream
  93
  94     while ((pCurrSeg = GetNextValueSegment(pCurrSeg)) != nullptr)
  95     {
  96         if (Amt == 0)               /// whole buffer is full now, so return
  97             return;
  98
  99         if (SegOffset <= Offset && Offset < SegOffset + pCurrSeg->GetSize()) /// begin at current segment
 100         {
 101             size_t OffsetIntoSeg = Offset - SegOffset;  /// relative value in this value segment stream
 102
 103             size_t AmtThisSeg = std::min(Amt, pCurrSeg->GetSize() -
 104                 OffsetIntoSeg);           /// size read in this segment, it's minimal value between Amt &
 105                                           /// remain part from OffsetIntoSeg to the end of this segment
 106
 107             size_t AmtReadThisSeg; /// actual read size in this segment
 108             if (pCurrSeg->IsImmediate())
 109             {
 110                 std::memcpy(pBuffer, pCurrSeg->GetImmediateData() +
 111                   OffsetIntoSeg, AmtThisSeg);
 112                 AmtReadThisSeg = AmtThisSeg;
 113             }
 114             else
 115             {
 116                 pContainer->SeekToPosition(pCurrSeg->GetPosition() +
 117                         OffsetIntoSeg);
 118                 pContainer->Read(pBuffer, AmtThisSeg, &AmtReadThisSeg);
 119             }
 120
 121             *pAmtRead += AmtReadThisSeg;
 122
 123             if (AmtThisSeg != AmtReadThisSeg)
 124                 return;
 125
 126             pBuffer += AmtReadThisSeg;
 127             Offset += AmtReadThisSeg;
 128             Amt -= AmtReadThisSeg;
 129         }
 130
 131         SegOffset += pCurrSeg->GetSize();
 132     }
 133 }
 134
 135 }//end namespace OpenStormBento
 136
 137 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */