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
   5  *  either of the following licenses
   6  *
   7  *         - GNU Lesser General Public License Version 2.1
   8  *         - Sun Industry Standards Source License Version 1.1
   9  *
  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
  16  *
  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.
  20  *
  21  *  This library is distributed in the hope that it will be useful,
  22  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  24  *  Lesser General Public License for more details.
  25  *
  26  *  You should have received a copy of the GNU Lesser General Public
  27  *  License along with this library; if not, write to the Free Software
  28  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  29  *  MA  02111-1307  USA
  30  *
  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.
  38  *
  39  *  Software provided under this License is provided on an "AS IS" basis,
  40  *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
  41  *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
  42  *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
  43  *  See the License for the specific provisions governing your rights and
  44  *  obligations concerning the Software.
  45  *
  46  *  The Initial Developer of the Original Code is: IBM Corporation
  47  *
  48  *  Copyright: 2008 by IBM Corporation
  49  *
  50  *  All Rights Reserved.
  51  *
  52  *  Contributor(s): _______________________________________
  53  *
  54  *
  55  ************************************************************************/
  56 #include "first.hxx"
  57 #include "assert.h"
  58 namespace OpenStormBento
  59 {
  60
  61 unsigned long
  62 CBenValue::GetValueSize()
  63 {
  64     unsigned long Size = 0;
  65     pCBenValueSegment pCurr = NULL;
  66     while ((pCurr = GetNextValueSegment(pCurr)) != NULL)
  67         Size += pCurr->GetSize();
  68     return Size;
  69 }
  70
  71 BenError
  72 CBenValue::ReadValueData(BenDataPtr pReadBuffer, unsigned long Offset,
  73   unsigned long Amt, unsigned long * pAmtRead)
  74 {
  75     BenError Err;
  76     unsigned long SegOffset = 0;
  77     *pAmtRead = 0;
  78     pCBenValueSegment pCurrSeg = NULL;
  79     pLtcBenContainer pContainer = GetContainer();
  80     BenByteDataPtr pBuffer = static_cast<BenByteDataPtr>(pReadBuffer);
  81
  82     /// pReadBuffer -- pointer to buffer of read result, allocated outside this function
  83     /// Offset          -- read buffer's start offset address, relative value in the whole value stream
  84     /// Amt             -- read buffer's size
  85     /// pAmtRead    -- return the actual read size
  86
  87     /// SegOffset     -- current segment's start address offset, relative value in the whole value stream
  88
  89     while ((pCurrSeg = GetNextValueSegment(pCurrSeg)) != NULL)
  90     {
  91         if (Amt == 0)               /// whole buffer is full now, so return
  92             return BenErr_OK;
  93
  94         if (SegOffset <= Offset && Offset < SegOffset + pCurrSeg->GetSize()) /// begin at current segment
  95         {
  96             unsigned long OffsetIntoSeg = Offset - SegOffset;  /// relative value in this value segment stream
  97
  98             unsigned long AmtThisSeg = UtMin(Amt, pCurrSeg->GetSize() -
  99                 OffsetIntoSeg);           /// size read in this segment, it's minimal value between Amt &
 100                                           /// remain part from OffsetIntoSeg to the end of this segment
 101
 102             unsigned long AmtReadThisSeg; /// actual read size in this segment
 103             if (pCurrSeg->IsImmediate())
 104             {
 105                 UtHugeMemcpy(pBuffer, pCurrSeg->GetImmediateData() +
 106                   OffsetIntoSeg, AmtThisSeg);
 107                 AmtReadThisSeg = AmtThisSeg;
 108             }
 109             else
 110             {
 111                 if ((Err = pContainer->SeekToPosition(pCurrSeg->GetPosition() +
 112                         OffsetIntoSeg)) != BenErr_OK)
 113                     return Err;
 114
 115                 if ((Err = pContainer->Read(pBuffer, AmtThisSeg,
 116                                             &AmtReadThisSeg)) != BenErr_OK)
 117                     return Err;
 118             }
 119
 120             *pAmtRead += AmtReadThisSeg;
 121
 122             if (AmtThisSeg != AmtReadThisSeg)
 123                 return BenErr_UnexpectedEndOfFile;
 124
 125             pBuffer += AmtReadThisSeg;
 126             Offset += AmtReadThisSeg;
 127             Amt -= AmtReadThisSeg;
 128         }
 129
 130         SegOffset += pCurrSeg->GetSize();
 131     }
 132     return BenErr_OK;
 133 }
 134
 135 }//end namespace OpenStormBento
 136
 137 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */