benval.cxx

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#include <sal/config.h>
 
#include <algorithm>
#include <cstring>
 
#include "bento.hxx"
 
namespace OpenStormBento
{
 
size_t
CBenValue::GetValueSize()
{
    size_t Size = 0;
    CBenValueSegment * pCurr = nullptr;
    while ((pCurr = GetNextValueSegment(pCurr)) != nullptr)
        Size += pCurr->GetSize();
    return Size;
}
 
void
CBenValue::ReadValueData(void * pReadBuffer, size_t Offset,
  size_t Amt, size_t* pAmtRead)
{
    size_t SegOffset = 0;
    *pAmtRead = 0;
    CBenValueSegment * pCurrSeg = nullptr;
    LtcBenContainer * pContainer = GetProperty()->GetContainer();
    BenByte* pBuffer = static_cast<BenByte*>(pReadBuffer);
 
 
 
    while ((pCurrSeg = GetNextValueSegment(pCurrSeg)) != nullptr)
    {
        if (Amt == 0)               
            return;
 
        if (SegOffset <= Offset && Offset < SegOffset + pCurrSeg->GetSize()) 
        {
            size_t OffsetIntoSeg = Offset - SegOffset;  
 
            size_t AmtThisSeg = std::min(Amt, pCurrSeg->GetSize() -
                OffsetIntoSeg);           
 
            size_t AmtReadThisSeg; 
            if (pCurrSeg->IsImmediate())
            {
                std::memcpy(pBuffer, pCurrSeg->GetImmediateData() +
                  OffsetIntoSeg, AmtThisSeg);
                AmtReadThisSeg = AmtThisSeg;
            }
            else
            {
                pContainer->SeekToPosition(pCurrSeg->GetPosition() +
                        OffsetIntoSeg);
                pContainer->Read(pBuffer, AmtThisSeg, &AmtReadThisSeg);
            }
 
            *pAmtRead += AmtReadThisSeg;
 
            if (AmtThisSeg != AmtReadThisSeg)
                return;
 
            pBuffer += AmtReadThisSeg;
            Offset += AmtReadThisSeg;
            Amt -= AmtReadThisSeg;
        }
 
        SegOffset += pCurrSeg->GetSize();
    }
}
 
}//end namespace OpenStormBento
 
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